KR102168703B1 - Refrigerator and control method thereof - Google Patents

Abstract

An embodiment of the present invention relates to a refrigerator and a refrigerator control method, comprising: a cabinet having an upper storage space and a lower storage space; A drawer door provided in a lower storage space so as to be able to be drawn in and out of the lower storage space and opening and closing the lower storage space; An elevating device provided in the drawer door to seat food and elevating in an up-down direction; A pull-out motor providing power for pull-out and pull-out of the drawer door; A lifting motor connected to the lifting device and providing power for lifting the lifting device; An operation unit for inputting a user's manipulation for the operation of the drawer door; And a control unit electrically connected to the operation unit, the withdrawal and inlet motor, and the lift motor, wherein the control unit lowers the lift device when a set time elapses in a state in which the lift device is lifted.

Description

Refrigerator and control method of refrigerators {Refrigerator and control method thereof}

The present invention relates to a refrigerator and a control method of the refrigerator.

In general, refrigerators are home appliances that allow low-temperature storage of food in an internal storage space that is shielded by a door. To this end, the refrigerator is configured to store the stored food in an optimal state by cooling the interior of the storage space using cold air generated through heat exchange with the refrigerant circulating through the refrigeration cycle.

Recent refrigerators are gradually becoming larger and multifunctional in accordance with changes in dietary life and the trend of high-end products, and refrigerators with various structures and convenience devices that enable users' convenience and efficient use of internal space are being released. .

The storage space of the refrigerator can be opened and closed by a door. In addition, it may be classified into various types of refrigerators according to the arrangement of the storage space and the structure of the door opening and closing the storage space.

Refrigerator doors can be classified into a rotating door in which the storage space is opened and closed by rotation, and a drawer door in which the storage space is opened and closed.

In addition, the drawer door is often disposed in the lower area of the refrigerator. When the drawer door is disposed in the lower area of the refrigerator, the waist must be bowed to take out the basket or food accommodated in the drawer door, and the basket or If the weight of the food is heavy, you may feel inconvenient to use the basket or cause injury.

In order to solve this problem, various structures in which a drawer-type door can be elevated have been developed.

Representatively, U.S. Patent No. 9,377,238 discloses a refrigerator provided with a lifting mechanism for lifting a bin provided in a refrigerator compartment.

An object of the present invention is to provide a refrigerator and a method for controlling the refrigerator to automatically perform drawing in/out and lifting of a drawer door according to a user's manipulation.

An object of the present invention is to provide a refrigerator and a method for controlling a refrigerator in which a drawer door can be continuously moved in and out and moved up and down by a user's manipulation.

An object of the present invention is to provide a refrigerator and a method for controlling the refrigerator in which a drawer door is automatically lowered when a set time elapses in an elevated state.

An object of the present invention is to provide a refrigerator and a method for controlling a refrigerator in which a drawer door is forcibly lowered and retracted by manipulating a control unit before a set time elapses while the drawer door is raised.

An object of the present invention is to provide a refrigerator and a control method of the refrigerator capable of adjusting a set time from when a drawer door is raised to a start of lowering of the drawer door.

An object of the present invention is to provide a refrigerator and a method for controlling the refrigerator capable of restraining withdrawal of the drawer door during the entire period in which the drawer door is raised and lowered.

A method of controlling a refrigerator according to an embodiment of the present invention includes: an operation input step of inputting a user's operation; A drawer door pulling step in which the drawer door is opened while the drawer door is pulled out by driving the drawer door according to the user's manipulation input; A lifting device lifting step of stopping the driving of the drawer door and then driving the lifting motor to start the lifting of the lifting device when detecting that the drawer door has been pulled out by a pull-out detection device for a set distance or more; A lifting device stopping step of stopping driving of the lifting motor when the lifting device is raised to a set height by the lifting detection device; A descending step of a lifting device in which the lifting motor is driven to lower the lifting device when a descending signal of the lifting device is input by a control unit; And a drawer door retracting step of stopping the drive of the lift motor and then driving the drawer door to close while the drawer door is retracted when it senses that the lowering of the lifter is completed by the lift detection device, and The control unit is characterized in that in the step of stopping the lifting device, lowering the lifting device when a set time elapses after stopping the driving of the lifting motor.

The set time can be inputted through the user's display manipulation.

In the step of stopping the lifting device, when the user manipulates the operation unit to input the lowering operation, the control unit may lower the lifting device even within the set time.

In the step of stopping the lifting device, when the user manipulates the operation unit to input an open hold operation, the set time may be reset.

When the operation unit is operated, the set time is increased, so that the execution time of the stopping step of the lifting device may be increased.

It is possible to increase the setting time step by step according to the number of operations of the manipulation unit.

When the operation unit is operated, the set time may be initialized.

When the drawer door withdrawal step is completed, it is possible to further perform a door withdrawal restraint step for restraining the movement of the drawer door.

The step of restraining the door withdrawal may be maintained until the step of lowering the lifting device is completed.

In the door pull-out and pull-out restraint step, the pull-out and pull-out motor may be braked by the control unit to restrict pull-out or pull-out of the drawer door.

In the door pull-out and retrieval restraint step, it is possible to restrain the movement of the drawer door itself in the front and rear directions.

When detecting that the lifting device is completely lowered by the lifting detection device, it is possible to perform a door pull-out restraint releasing step of releasing the restraint of the drawer door.

In the step of stopping the lifting device, it is possible to output the change in the set time to the outside.

The change in the setting time may be displayed on the screen through the display.

The change in the set time may be audio output by the speaker.

The manipulation unit includes a microphone, and it is possible to input a manipulation by receiving a user's voice through the microphone.

A refrigerator according to an embodiment of the present invention includes a cabinet including an upper storage space and a lower storage space; A drawer door provided in a lower storage space so as to be able to be drawn in and out of the lower storage space and opening and closing the lower storage space; An elevating device provided in the drawer door to seat food and elevating in an up-down direction; A pull-out motor providing power for pull-out and pull-out of the drawer door; A lifting motor connected to the lifting device and providing power for lifting the lifting device; An operation unit for inputting a user's manipulation for the operation of the drawer door; And a control unit electrically connected to the operation unit, the withdrawal and inlet motor, and the lift motor, wherein the control unit lowers the lift device when a set time elapses in a state in which the lift device is lifted.

The operation unit may be able to manipulate the change or initialization of the set time.

The operation unit may input an operation so that the lifting device is lowered before the lapse of the set time.

The motor includes a brake for preventing rotation, and the control unit may restrain the drawer door from rotating by the brake when the drawer door is pulled out by a set distance.

The controller may release the restraint of the withdrawal motor so that the withdrawal motor rotates forward and backward only in a state in which the lifting device is lowered.

In the refrigerator and the control method of the refrigerator according to the proposed embodiment, the following effects can be expected.

A refrigerator according to an embodiment of the present invention is configured to allow a part of the storage space inside the drawer door to be lifted or lowered while the drawer door is pulled out. Accordingly, the user does not have to bend the waist excessively when the food inside the drawer door disposed below is stored, so that the convenience of use can be improved.

In addition, when the user manipulates the operation unit, the drawer door is configured so that both withdrawal, in-out and elevating can be performed continuously, so that direct manipulation of the refrigerator can be minimized to improve convenience in use.

In particular, in a state in which the lifting device inside the drawer door is raised so that the user can easily store food, the drawer door maintains the lifting state of the lifting device for a lyrical time, and when the set time elapses, the platform is automatically lifted without additional operation. Convenience of use can be maximized by allowing the teeth to descend and the drawer door to close.

In addition, when the drawer door is to be closed before the lapse of the set time, the lifting device is lowered without delay and the drawer door is closed without delay through the manipulation of the operation unit, thereby minimizing the loss of cold air in the compartment.

In addition, there is an advantage that convenience of use can be further improved by allowing the set time to be adjusted by a user's manipulation according to a pattern or situation of a storage operation.

In addition, while the lifting device is elevated, the drawer door can be restrained from being pulled out, and thus the drawer door is closed while the lifting device is being driven, thereby preventing a situation in which a refrigerator is damaged or a user's safety problem occurs.

In addition, since the lifting device is performed only in a state in which the drawer door is completely constrained, there is an advantage of securing stability when food is stored, as well as preventing flow during operation of the lifting device.

1 is a front view of a refrigerator according to an embodiment of the present invention.
2 is a cross-sectional view schematically illustrating an elevated state of a lower drawer door of a refrigerator according to an embodiment of the present invention.
3 is a perspective view of the container of the lower drawer door separated.
4 is an exploded perspective view of the lower drawer door as viewed from the front in which the drawer part and the door part are separated.
5 is a rear view of the door part.
6 is a rear view of a state in which the door cover of the door portion is removed.
7 is a perspective view of the driving device in a state in which the driving device and the lifting device are connected.
8 is a front perspective view of the driving device.
9 is a front perspective view showing the internal structure of the driving device.
10 is a partial enlarged view showing a structure in which power is transmitted to a screw of the driving device.
11 is a perspective view of the drawer part.
12 is an exploded perspective view of the drawer part.
13 is a perspective view of a lifting device according to an embodiment of the present invention.
14 is a view showing a state in which the upper frame of the lifting device is raised.
15 is a view showing a state in which the lever of the present invention is connected to the lifting device.
16 is a block diagram schematically illustrating a connection between a control unit and components connected to the control unit according to an embodiment of the present invention.
17 is a flow chart showing the drawing-out and lifting operation of the drawer door.
18 is a perspective view of the drawer door in a closed state.
19 is a perspective view of a state in which the drawer door is completely withdrawn.
20 is a cross-sectional view illustrating a state of the drawer in the state of FIG. 19.
21 is a perspective view showing the state of the driving device and the lifting device in the state of FIG. 19;
22 is a cross-sectional view showing a state of the drawer in a state in which the lifting device is raised.
23 is a cross-sectional view showing a state of the drawer in a state in which the lifting device is raised and waiting.
FIG. 24 is a perspective view showing states of the driving device and the lifting device in the state of FIG. 23.
25 is a cross-sectional view showing a state of the drawer in a state in which the lifting device is lowered.
26 is a cross-sectional view showing a state of the drawer in a state in which the drawer door is retracted.
27 is a flowchart showing an operation for adjusting the waiting time of the lifting state of the lifting device.
28 is a flow chart showing an operation for performing a pull-out and elevating operation of the drawer door by a user's individual operation.
29 is a flowchart illustrating an operation of closing the drawer door again after being withdrawn.
30 is a flowchart illustrating an operation when an obstacle is recognized during withdrawal of the drawer door.
31 is a flow chart showing an operation when an obstacle is recognized during retraction of the drawer door.
32 is a flowchart illustrating an operation when an obstacle is recognized during ascent of the lifting device.
33 is a flow chart showing an operation when an obstacle is recognized during descending of the lifting device.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the constituent elements of the embodiment of the present invention, terms such as first, second, A, B, (a), (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

1 is a front view of a refrigerator according to an embodiment of the present invention. And, FIG. 2 is a cross-sectional view schematically illustrating an elevated state of a lower drawer door of a refrigerator according to an embodiment of the present invention.

1 and 2, the refrigerator 1 may have an external shape formed by a cabinet 10 forming a storage space and a door 2 shielding the opened front surface of the cabinet 10. have.

The storage space inside the cabinet 10 may be divided into a plurality of spaces. For example, the upper space 11 of the cabinet 10 may be divided into a refrigerating chamber, and the lower space 12 may be divided into a freezing chamber. Of course, the upper space and the lower space may be divided into separate spaces maintained at different temperatures rather than a refrigerating compartment or a freezing compartment, and may be referred to as an upper space and a lower space.

The door 2 may include a rotating door 20 that opens and closes the upper space by rotation, and a drawer door 30 that opens and closes the lower space by drawing in/out. The lower space may be further divided up and down, and the drawer door 30 may include a drawer door 30 provided at an upper portion and a drawer door 30 provided at a lower portion.

In addition, the rotating door 20 and the drawer door 30 are formed of a metal material to form an exterior that is exposed to the front.

The present invention has been described on the basis of a refrigerator in which the rotating door 20 and the drawer door 30 are disposed together, but the present invention is not limited thereto, and all types of refrigerators provided with a drawer-type door Will be applicable. In addition, the rotary door 20 may be provided at an upper portion and may be referred to as an upper door, and the drawer door 30 may be provided at a lower portion to be referred to as a lower door.

It may be composed of at least a transparent panel 21 of the rotating door 20. The transparent panel 21 may have a structure capable of seeing the inside of the cabinet. For example, a lighting device (not shown) may be provided inside the storage space or on the rear surface of the rotating door 20, and the interior of the cabinet is brightened according to the turning on and off of the lighting device. Selective perspective of the inside is possible.

Meanwhile, the transparent panel 21 may be composed of a plurality of panels, and an insulating space is formed between the plurality of panels to prevent deterioration of the cooling performance inside the cabinet. In addition, a display 211 may be provided inside the transparent panel 21. Accordingly, it may also be possible to output a screen through the transparent panel 21.

The display 211 may be installed on the entire transparent panel 21 or may be partially installed. Of course, the display 211 may be installed on the entire transparent panel 21 and may be partially output.

In addition, the transparent panel 21 may include a touch sensor to perform a touch manipulation of a screen output through the display 211, and an operation input of the refrigerator 1 may also be possible. Accordingly, the screen output through the display 211 may function as a manipulation unit, and the display 211 may be referred to as a manipulation unit.

In addition, the transparent panel 21 may be configured as a separate door, and may be configured to open and close the opening of the transparent panel 21 to access the basket 212 provided in the rotating door 20. have. That is, the rotary door 20 may be configured as a double door so that both the opening and closing of the rotary door 20 and the opening and closing of the transparent panel 21 are possible.

On the other hand, the rotating door 20 may not be provided with a transparent panel 21, and in this case, a separate display for displaying the operating state of the refrigerator 1 may be provided on the front of the rotating door 20. I can.

A first proximity sensing device 213 may be provided on one side of the front side of the rotating door 20. The first proximity sensing device 213 is for detecting the proximity of the user, and may be configured as a device such as an ultrasonic or laser sensor that can detect that the user is positioned in front of the refrigerator 1.

In addition, at one side of the rotary door 20, a first operation unit 214 capable of operating withdrawal of the drawer door 30 may be provided. The first manipulation unit 214 may be disposed on one of the left and right sides of the rotary door 20. Therefore, the first manipulation unit 214 may not be exposed to the outside.

In addition, the first manipulation unit 214 is disposed inside the rotation door 20 and is configured with a touch sensor, so that the user inputs manipulation by touching the surface of the rotation door 20. .

On the other hand, through the manipulation of the first operation unit 214, the drawer door 30 may be set to move in/out and lift. For example, the drawer door 30 can be continuously and automatically performed through a single operation. In addition, according to the user's setting, the drawer door 30 may be pulled out and moved up and down by separate operations.

The setting states of the drawer door 30 withdrawal and inlet and the lifting operation may be displayed through the display 211. In addition, when a touch manipulation of the display 211 is possible, an operation setting of the drawer door 30 through the display 211 may also be possible.

Meanwhile, the input for the operation of the drawer door 30 may be made valid only when a user's proximity is sensed by the first proximity sensing device 213. That is, when the user stands in front of the refrigerator with the intention of using the refrigerator 1, the first proximity sensing device 213 may detect the user. In such a state, when a manipulation signal of the first manipulation unit 214 is input, the drawer door 30 may be operated. Accordingly, it is possible to prevent the drawer door 30 from being pulled out and moved up and down due to an erroneous operation.

Meanwhile, a second operation unit 301 may be provided on the drawer door 30. The second operation unit 301 may be provided on one side of the drawer door 30 positioned at the bottom of the drawer door 30, and the second operation unit 301 may be configured by a touch or a button method. . Of course, if the upper drawer door 30 is also elevating, the second operation unit 301 may be provided in the front of the upper drawer door 30 as well.

In addition, as shown in the drawing, the third operation unit 302 may be provided at the lower end of the lower drawer door 30. The third manipulation unit 302 may be configured to output a virtual switch by irradiating an image on the floor surface and input manipulation in a manner in which a user approaches a corresponding area. Through the third operation unit 302, the drawer door 30 may be input/exited and lifted.

In the case of the third operation unit 302, since it is provided on the lower door, it may interfere with a user when the lower door is automatically pulled out and in, and thus may be used for lifting and lowering of the lower drawer door 30 instead of withdrawal. Of course, when the cabinet 10 is provided with a door opening device (not shown) for opening the rotary door 20, the third operation unit 302 is operated to open the rotary door 20. It would also be possible.

The drawer door 30 may be operated for automatic withdrawal and/or automatic elevation by at least one of a plurality of operation units 214, 301, and 302. Of course, only one of the plurality of manipulation units 214, 301, and 302 may be provided as needed.

On the other hand, the operation units (214,301,302) are composed of a plurality of can be used for the drawer door 30 withdrawal and lowering, and according to a combination or sequential operation of the plurality of operation units 214,301,302 It can also be manipulated.

When the operation parts 214, 301, and 302 are operated to store food stored in the lower drawer door 30, the drawer door 30 is pulled out to the front, and then the container inside the drawer door 30 ( 36) can be elevated.

Meanwhile, the container 36 may have a predetermined height. Since the container 36 is seated in the lifting device 80 to be described later, the height of the container 36 may be added to the height of the lifting device 80 when the lifting device 80 is raised. Accordingly, when the lifting device 80 is raised, it may be located at a point where it is very easy for a user to access the container 36 or lift the container 36.

Therefore, the container 326 can be completely accommodated in the drawer 32 when the drawer door 30 is withdrawn, and is at a higher position than the lower storage space 12 when the lifting device 80 is raised. It can be formed to be positioned.

On the other hand, the shape of the container 36 is not limited, but may be a shape corresponding to the size of the front space (see S1 in FIG. 3), and has a predetermined height even when the lifting device 80 is raised. It would be desirable to be configured so that the food contained therein does not come off.

By such an operation, the food or container 36 inside the drawer door 30 disposed at the lowermost position can be more easily lifted and used.

The drawer door 30 is automatically pulled back and forth by a pull-out motor 14 and pinion 141 provided in the cabinet 10 and a pull-out rack 34 provided on the lower surface of the drawer door 30 It could be. In addition, the container inside the drawer door 30 located at the bottom may be lifted and lowered by a driving device 40 and a lifting device 80 provided in the drawer door 30.

Hereinafter, a configuration for the operation of the drawer door 30 and the drawer door 30 of the present invention will be described in more detail. Unless otherwise stated, the lower drawer door 30 is referred to as a drawer door or I will call it the door.

Meanwhile, the embodiment of the present invention is not limited to the number and shape of drawer doors, and may be applied to all refrigerators provided with a drawer-type door in a lower storage space.

3 is a perspective view of the container of the lower drawer door separated. 4 is an exploded perspective view of the lower drawer door as viewed from the front in which the drawer part and the door part are separated.

1 to 4, the drawer door 30 has a door part 31 that opens and closes the storage space, and is coupled to the rear surface of the door part 31 so as to be drawn in and out with the door part 31. It may include a drawer 32.

The door part 31 may be exposed to the outside of the cabinet 10 to form the exterior of the refrigerator 1, and the drawer part 32 is disposed inside the cabinet 10 to form a storage space. can do. In addition, the door portion 31 and the drawer portion 32 may be combined with each other to be withdrawn in and out of the front and rear directions.

The drawer part 32 is always located on the rear surface of the door part 31 and may form a space in which food or containers for storage are accommodated. The inside of the drawer part 32 may form an upper storage space, and the outside of the drawer part 32 may have an exterior formed by a plurality of plates (391,392,395 in FIG. 13).

The plurality of plates 391, 392, 395 may be made of a metal material such as stainless steel, and are provided outside as well as inside of the drawer part 32 so that the entire drawer part 32 has the same texture as stainless steel or stainless steel. Can be formed.

In a state in which the drawer door 30 is retracted, a machine room 3 in which a compressor and a condenser constituting a refrigeration cycle are disposed may be disposed behind the drawer door 30. Accordingly, the rear part of the drawer part 32 may have an upper end protruding more than a lower end, and the rear part of the drawer part 32 may include an inclined surface 321.

Further, on both sides of the drawer part 32, draw-out rails 33 that guide the draw-out of the drawer door 30 may be provided. The drawer door 30 can be mounted to the cabinet 10 so as to be retractable by the draw-out rail 33. The lead-in/out rail 33 may be shielded by an outer side plate 391 so as not to be exposed to the outside. The draw-out rail 33 may be configured in a rail structure that can be extended in multiple stages.

A rail bracket 331 is provided on the draw-out rail 33, and the rail bracket 331 may extend from one side of the draw-out rail 33 to both sides of the drawer part 32. In addition, the rail bracket 331 may be fixedly coupled to the interior wall of the cabinet. Accordingly, the drawer part 32, that is, the drawer door 30 may be mounted to the cabinet 10 so as to be retractable by the draw-out rail 33.

In addition, the draw-out rail 33 may be provided at the bottom of both side surfaces of the drawer part 32. In addition, the lower ends of both sides of the drawer part 32 are mounted in a form that is seated above the draw-out rail 33, and thus, the draw-out rail 33 may be referred to as the under rail. .

A pull-out rack 34 may be provided on the lower surface of the drawer part 32. The draw-out rack 34 may be disposed on both sides, and is connected with the drive of the draw-out motor 14 mounted on the cabinet 10 to enable automatic draw-out of the drawer door 30. That is, when the operation unit 22 and 301 inputs an operation, the draw-out motor 14 is driven so that the drawer door 30 can be pulled in and out according to the movement of the draw-out rack 34. At this time, the drawer door 30 can be stably pulled in and out by the pull-out rail 33.

Meanwhile, the inside of the drawer unit 32 may be divided into a front space S1 and a rear space S2. The front space S1 may include a lifting device 80 that is lifted up and down, and a container 36 that is seated in the lifting device 80 and lifted together with the lifting device 80.

The container 36 is shown in the form of a basket with an open top, but may have a closed box structure such as a kimchi container, and a plurality of containers may be stacked or disposed side by side.

In addition, when the drawer door 30 is withdrawn, the entire drawer part 32 cannot be withdrawn out of the storage space due to the limitation of the withdrawal distance of the drawer door 30, and at least the front space (S1) It is drawn out of the storage space, and all or part of the rear space S2 is located inside the storage space inside the cabinet 10.

In such a structure, the draw-out distance of the drawer door 30 may be limited by the draw-out rack 34 or the draw-out rail 33, and the drawer door 30 in a pull-out state as the draw-out distance increases. This is because it becomes difficult to maintain a stable state as the moment applied to the pull-out rail 33 or the pull-out rack 34 may be deformed or damaged.

Inside the front space (S1), a lifting device 80 and a container 36 are accommodated, and the lifting device 80 is lifted up and down, while the food or container 36 seated in the lifting device 80 ) Can be raised and lowered together. In addition, the lifting device 80 may be provided below the container 36. Accordingly, when the container 36 is mounted, the lifting device 80 may be covered by the container 36, and no configuration of the lifting device 80 is exposed to the outside.

A separate drawer cover 37 may be provided in the rear space S2. The front space S1 and the rear space S2 may be partitioned by the drawer cover 37. When the drawer cover 37 is mounted, the front and upper surfaces of the rear space S2 are shielded so that the unused space is not exposed to the outside.

With the mounting of the drawer cover 37, the rear space S2 is covered when the drawer door 30 is withdrawn, and only the front space S1 is exposed when the drawer door 30 is pulled out. It becomes possible to provide an appearance. In addition, the remaining space except for the space in which the lifting device 80 and the container 36 are mounted is covered to prevent problems such as food dropping or getting objects caught in the gap during lifting.

However, when the drawer cover 37 is separated, it becomes accessible to the rear space S2, and food can be stored in the rear space S2. In order to utilize the rear space S2, a separate pocket or a container corresponding to the shape of the rear space may be disposed in the rear space S2.

And, in order to utilize the entire space inside the drawer part 32, the lifting device 80 inside the drawer part 32 can be simply detachably mounted, and the lifting device 80 and the drawer cover 37 By separating the drawer unit 32, the entire inner space may be utilized.

External appearances of the inner and outer surfaces of the drawer 32 may be formed by plates (see 391, 392, and 395 in FIG. 13), and the external and internal appearances of the drawer 32 are shielded by shielding the components mounted on the drawer 32. You can make it look neat. The plates (see 391, 392, and 395 in FIG. 13) may be formed in a plurality, and may be formed of a stainless material to provide a more luxurious and clean appearance.

Meanwhile, the door part 31 and the drawer part 32 constituting the drawer door 30 may have a structure that can be separated and coupled to each other. Assembly workability and serviceability may be improved through the detachable structure of the door part 31 and the drawer part 32.

The rear surface of the door part 31 and the front surface of the drawer part 32 may be coupled to each other, and when the door part 31 and the drawer part 32 are combined, the power for lifting the lifting device 80 It can be configured to provide.

A driving device (refer to 40 in FIG. 6) for lifting the lifting device 80 may be disposed in the door part 31, and the door part 31 and the drawer part 32 may be selectively connected. .

In particular, the driving device (refer to 40 in FIG. 6) provided in the door 31 may be configured with components operated by an input of power and components for transmitting power to the lifting device 80. Therefore, when the service of the driving device (refer to 40 in FIG. 6) is required, the door part 31 can be separated to take action, and only the door part 31 can be replaced to take a simple action.

The door part 31 and the drawer part 32 may be coupled by a pair of door frames 316 provided on both sides.

The door frame 316 includes a door coupling portion 316a extending in the vertical direction and coupled to the door portion 31, and a drawer coupling portion 316b extending rearward from the lower end of the door coupling portion 316a. It may include.

The door coupling portion 316a may be coupled to the door portion 31 by a separate coupling member, or may be coupled to one side of the door portion 31 by a simple coupling structure. Further, the drawer coupling part 316b may be disposed to be inserted into both sides of the drawer part 32 so as to be adjacent to the draw-out rail 33. In addition, the drawer coupling portion 316b may be mounted on the drawer portion 32 in a state coupled to the draw-out rail 33. Can be inserted and placed.

In a state in which the door coupling part 316a is coupled to the door part 31, the drawer coupling part 316b may be inserted into the drawer part 32 to support the drawer part 32. In addition, the drawer coupling portion 316b may be coupled to the drawer portion 32 by a separate coupling member, or may be coupled to each other by a structure that fits each other.

In addition, when the door part 31 and the drawer part 32 are combined, a part of the lifting device 80 is provided on the front of the drawer part 32 so that the driving device 40 and the lifting device 80 can be connected. A drawer opening 35 through which is exposed may be formed.

On the other hand, the door part 31 is formed to substantially open and close the storage space of the cabinet 10 and at the same time form a front exterior of the refrigerator 1.

The door part 31 includes an outer case 311 forming a part of the front and circumferential surfaces, a door liner 314 forming a rear surface, an upper decor 312 and a lower decor 313 forming the upper and lower surfaces. The appearance can be formed by this. In addition, an insulating material (not shown) may be filled inside the door portion 31 between the outer case 311 and the door liner 314.

Hereinafter, the door portion 31 constituting the drawer door 30 and the driving device 40 provided in the door portion 31 will be described in more detail with reference to the drawings.

5 is a rear view of the door part. And, Figure 6 is a rear view of a state in which the door cover of the door portion is removed. 7 is a perspective view of the driving device in a state in which the driving device and the lifting device are connected. And, Figure 8 is a front perspective view of the drive device. And, Figure 9 is a front perspective view showing the internal structure of the driving device. And, Figure 10 is a partial enlarged view showing a structure in which power is transmitted to the screw of the driving device.

4 to 10, the door portion 31 may have a front surface formed by the out plate 311 and a rear surface formed by the door liner 314.

In addition, a driving device 40 for operating the lifting device 80 may be provided inside the door part 31. The driving device 40 is disposed inside the door part 31, but is not buried in the heat insulating material, but is provided inside the space formed by the door liner 314, and the door cover 315 It may be configured to be shielded by and not exposed to the outside.

In detail, an insulating material may be filled between the out plate 311 and the door liner 314, and insulate the inside of the storage space 12.

Further, the door liner 314 may be provided with a door recessed portion that is recessed inward. The door recessed portion may be formed in a shape corresponding to the shape of the driving device 40 and may be recessed into the inside of the drawer door 30. In addition, the door recessed portion may be recessed so that electrical components including the door light 318 for illuminating the interior of the container are further mounted.

The door light 318 is formed long in the horizontal direction from the left to the right of the rear surface of the drawer door 30, and is located at the top of the inner region of the gasket 317 formed along the circumference of the rear surface of the drawer door 30 Can be.

The door light 318 is configured such that a plurality of LEDs and light irradiated from the LEDs are directed toward the inside of the drawer door 30, particularly the drawer part 32, and the drawer door 30 is withdrawn. In the open state, the inside of the drawer 32 is illuminated.

The door cover 315 is for forming a rear exterior of the door part 31 and shields the driving device 40 mounted on the door part 31. The door cover 315 may be formed in a plate shape, and may be shielded so that the driving device 40 is not exposed in a state in which the driving device 40 is mounted.

The door cover 315 may have a cover recessed portion formed at a corresponding position so as to cover the driving device 40 from the rear. The cover depression may be formed such that a front surface of the door cover 315, that is, a surface facing the driving device 40, is recessed, and a rear surface of the door cover 315, that is, a surface facing the inside of the storage space, may be formed to protrude. .

In addition, the side cutouts 315a may be formed at both left and right side ends of the door cover 315. The side cutout 315a may provide a space for the door frame 316 to be coupled to the door part.

Meanwhile, cover openings 315b may be formed at both sides of the lower end of the door cover 315. The cover opening 315b exposes the receiving portion 421a of the lever 42, which is a component of the driving device 40, and access to the receiving portion 421a through the cover opening 315b is It becomes possible. In addition, the cover opening 315b may be located at a position facing the drawer opening 35.

Therefore, when the door part 31 and the drawer part 32 are coupled, the cover opening 315b and the drawer opening (35 in FIG. 13) can communicate with each other, and thus, the cover opening 315b and The receiving part 421a and the coupling part 842c of the lifting device 80 may be coupled through the drawer opening 35. That is, the driving device 40 and the lifting device 80 may be connected to each other, and the lifting device 80 may be raised or lowered according to the operation of the driving device 40. In addition, it may be possible to separate only the lifting device 80 through the separation of the receiving portion 421a and the coupling portion 842c in a state in which the door portion 31 and the drawer portion 32 are coupled.

On the other hand, in the center of the lower end of the door cover 315, a cable hole 315c through which cables connected to electrical components such as the driving device 40 provided in the door part 31 and the door light 318 enter and exit is further provided. Can be formed. Wires entering and leaving through the cable hole 315c may pass under the drawer 32 and be connected to the cabinet 10.

A door gasket 317 may be provided along the rear circumference of the door part 31, and when the drawer door 30 is closed, the door gasket 317 contacts the front surface of the cabinet 10 to be airtight. I can.

Meanwhile, the driving device 40 may be shielded by the door cover 315 and disposed inside the door part 31. The power of the driving device 40 may be transmitted to the lifting device 80. At this time, the driving device 40 simultaneously transmits power to the left and right sides of the lifting device 80 so that the lifting device 80 does not incline or tilt to one side under any circumstances, and lifts and descends in a horizontal state. You can do it.

Hereinafter, the configuration of the driving device 40 will be described in detail.

The driving device 40 includes a motor assembly 60, a pair of screw units 50, 50a disposed on both sides of the motor assembly 60, and connected to each of the screw units 50, 50a. It may include a pair of levers 42.

In detail, the motor assembly 60 may be located in the center portion in the left-right direction of the door portion 31. Further, it may be configured to enable the operation of the screw units 50 and 50a and the lever 42 on both sides by driving the motor assembly 60 including one lifting motor 64.

Particularly, the motor assembly 60 may adjust the amount of deceleration and transmitted force through a combination of a plurality of gears.

In addition, the motor assembly 60 has a structure in which the lifting motor 64 and gears are arranged up and down in order to minimize a space that is depressed when mounted on the door part 31, and in particular, the motor assembly 60 It may be formed to widen the width in the left and right directions to minimize the thickness of the material and to minimize the thickness in the front and rear directions.

In addition, the lifting motor 64 constituting the motor assembly 60 may protrude toward the drawer part 32 to minimize the depression depth of the door part 31 to ensure thermal insulation performance.

The elevating motor 64 provides power for elevating the elevating device 80 and may be configured to be able to rotate forward and backward. Accordingly, when the lifting signal of the lifting device 80 is input, it is rotated forward and backward, thereby providing power for lifting the lifting device 80. Further, it may be stopped when a load of the lift motor 64 or a stop signal is input by detection of a sensor.

The motor assembly 60 includes a motor case 61 in which the lifting motor 64 is installed, and a motor cover 62 coupled to the motor case 61 and covering the lifting motor 64. I can.

The axis of rotation of the lifting motor 64 may protrude from the motor case 61 toward the opposite side of the motor cover 62. In addition, the motor assembly 60 may further include a power transmission unit for transmitting the power of the lifting motor 64. The power transmission unit may be located on the opposite side of the lifting motor 64 with respect to the motor case 61.

Further, the power transmission unit may be formed of a combination of a plurality of gears, and may be shielded by a cover member 66 mounted on the opposite side of the lifting motor 64.

The power transmission unit may include a driving gear 651 connected to the shaft of the lifting motor 64 passing through the motor case 61. The power transmission unit may further include a first transmission gear 652 meshed with the driving gear 651 from a lower side of the driving gear 651.

The first transmission gear 652 may be, for example, a multi-stage gear. As an example, the first transmission gear 652 includes a first gear 652a meshed with the driving gear 651 and a second gear 652b having a diameter smaller than that of the first gear 652a. Can include. Each of the first gear 652a and the second gear 652b may be a spur gear.

The power transmission unit may further include a second transmission gear 653 meshing with the first transmission gear 652. The second transmission gear 653 may mesh with the first transmission gear 652 from a lower side of the first transmission gear 652. The second transmission gear 653 includes a first gear 653a meshing with the second gear 652a of the first transmission gear 652, and a first gear having a larger diameter than the first gear 653a. It may include 2 gears 653b.

Each of the first gear 653a and the second gear 653b of the second transmission gear 653 may be a spur gear. In addition, the second gear 653b of the second transmission gear 653 may be located below the first gear 652a of the first transmission gear 652. Accordingly, an increase in the front and rear width of the driving device 60 can be prevented by the first transmission gear 652 and the second transmission gear 653.

The power transmission unit may further include a third transmission gear 654 meshed with the second transmission gear 653. The third transmission gear 654 may mesh with the second gear 653b under the second gear 653b of the second transmission gear 653. The third transmission gear 654 may be a spur gear. A portion of the third transmission gear 654 may be disposed to overlap the second transmission gear 653 in the front-rear direction.

A gear shaft for rotatably supporting the plurality of transmission gears may be provided in the motor case 61.

The power transmission unit may include a pair of cross gears 655 and 656 meshed with the third transmission gear 654. The pair of crossover gears 655 and 656 are arranged to be spaced apart from each other in the left and right direction, and the rotation center is lower than the rotation center of the third transmission gear 654 to be meshed with the third transmission gear 654. have.

Each of the crossed gears (655, 656) is a spur gear (655a, 656a) and a helical gear form so that the cross gears (655, 656) can mesh with the third transmission gear (654). It may include first helical gear units 655b and 656b.

In addition, the rotation center lines of the cross gears 655 and 656 spaced apart from each other may extend horizontally to each other.

The power transmission unit may further include a pair of second helical gear units 657 and 657a meshing with each of the cross gears 655 and 656.

The second helical gear parts 657 and 657a may mesh with the first helical gear parts 655b and 656b. The rotation center lines of the second helical gear units 657 and 657a may be disposed to cross the rotation center lines of the cross gears 655 and 656. Accordingly, the first helical gear units 655b and 656b and the second helical gear units 657 and 657a are intersected with each other, and may be configured to be engaged with each other to transmit rotation.

The rotation center lines of the cross gears 655 and 656 may extend in the front-rear direction, and the rotation center lines of the second helical gear units 657 and 657a may extend in the vertical direction. Further, the rotation center lines of the second helical gear units 657 and 657a disposed on both left and right sides may be inclined in a direction that is further away from each other toward the upper side.

As described above, the use of a pair of crossed helical gears has the advantage that the power transmission direction can be easily switched and the structure for power transmission becomes compact. In particular, even when a large force is transmitted for the lifting of the lifting device 80, a large noise is not generated.

The pair of screw units 50 and 50a may be disposed on both left and right sides of the motor assembly 60.

The pair of screw units (50, 50a) are disposed on both left and right sides of the inside of the door part (31), and the pair of screw units (50, 50a) differ only in their mounting positions, and their structure and shape Are the same.

Power of the lifting motor 64 may be transmitted from the lower side of the screw units 50 and 50a.

The screw units 50 and 50a on both sides may be formed to be symmetrical with respect to the motor assembly 60. Accordingly, the motor assembly 60 may be disposed between the screw units 50 and 50a positioned on both sides, and the screw units 50 and 50a disposed on both sides are the distance between the top and bottom. Can be arranged to get closer and closer.

The screw units 50 and 50a may include screws 52 and 52a that are rotated by receiving power from the lifting motor 64. The screws 52 and 52a may be inclined to extend in a vertical direction, with an upper end facing the outside and a lower end facing the outside.

The screws 52 and 52a may be connected to the second helical gear units 657 and 657a. That is, the screws 52 and 52a may be rotated together when the second helical gear units 657 and 657a are rotated. For example, an insertion portion may be formed in the second helical gear portions 657 and 657a, and an accommodation groove in which the insertion portion is accommodated may be formed in the screw 52.

Accordingly, the screws 52 and 52a are also disposed to be symmetrical on both left and right sides with respect to the motor assembly 60, and may be disposed obliquely on the same center line as the center line of the second helical gear units 657 and 657a. . Accordingly, the screws 52 and 52a on both sides of the left and right sides have an arrangement that is farther away from each other as it goes upward.

The screw units 50 and 50a may further include screw holders 56 and 56a through which the screws 52 and 52a are coupled.

The screw holders 56 and 56a may be moved vertically along the screws 52 and 52a when the screws 52 and 52a are rotated. In addition, the lever 42 may be coupled to the screw holders 56 and 56a. When the screw holders 56 and 56a are moved, the lever 42 may be rotated.

In detail, a holder through hole 561 is formed in the center of the screw holders 56 and 56a. The holder through-hole 561 is formed to pass through the screw holders 56 and 56a, and is inserted and mounted so that the screws 52 and 52a pass through the holder through-hole 561. A thread coupled to the screw may be formed on the inner side of the holder through hole 561. Accordingly, when the screws 52 and 52a are rotated, the screw holders 56 and 56a are movable along the screws 52 and 52a.

In addition, guide holes 562 are formed on both left and right sides of the holder penetrating portion 561. The guide hole 562 is a portion through which the guide bars 53 and 54 to be described below pass, and the screw holders 56 and 56a may be moved along the guide bars 53 and 54. In this case, a bearing or other configuration for reducing friction is disposed on the inner surface of the guide hole 562 to facilitate the movement of the screw holders 56 and 56a.

Since a pair of the guide bars 53 and 54 are configured to pass through the guide hole 562, the screw holders 56 and 56a do not flow left and right, and a stable lift is possible. In particular, stable lifting is possible even in a situation where a heavy load is applied to drive the lifting device 80, and noise is not generated.

In addition, a magnet 563 may be provided in the screw holder 56a. As an example, a magnet mounting groove 563a into which a magnet is pressed may be formed in the screw holder 56a, and the magnet 563 may be inserted into the magnet mounting groove 563a.

The magnet 563 is for detecting the position of the screw holder 56a, and when the screw holder 56a is located at the lowest or upper end of the screws 52, 52a, a lift detection device to be described below. (55) will be able to detect this. That is, whether the magnet 563 mounted on the screw holder 56a is sensed, it is possible to determine the completion of the ascending and descending of the lifting device.

Further, although not shown in detail, the holder connector 564 may be mounted on the opposite side of the rear surface of the screw holder 56a on which the magnet 563 is provided, that is, the front surface of the screw holder.

The holder connector 564 is for connecting the lever 42 and the screw holders 56 and 56a, and may be fixedly mounted to the screw holders 56 and 56a. That is, the holder connector 564 may be coupled to the screw holders 56 and 56a while passing through the lever 42. The lever 42 may include a rectangular slot 426 so that the holder connector 564 does not interfere with the rotation of the lever 42.

Since the screw units 50 and 50a are disposed on both left and right sides, extension lines of the screws 52 and 52a on both left and right sides may cross outside of the driving device 40.

The lever 42 connects the screw holders 56 and 56a and the lifting device 80, and both ends may be coupled to the screw holders 56 and 56a and the lifting device 70, respectively.

The screw units 50 and 50a may further include a housing 51 accommodating the screws 52 and 52a.

The housing 51 forms an outer shape of the screw units 50 and 50a, and forms a space in which screws 52 and 52a and screw holders 56 and 56a can be accommodated, and is opened. The portion may be shielded by a cover member 66 to be described later.

The housing 51 may be formed by bending a plate-shaped metal material or may be formed of a plastic material.

The housing 51 may include a first accommodating portion 511 accommodating the screws 52 and 52a and a second accommodating portion 512 accommodating the second helical gear portions 657 and 657a. have.

The first accommodation part 511 and the second accommodation part 512 may be partitioned by a partition wall 513. The second accommodating part 512 is located below the first accommodating part 511.

Part of the crossover gears 655 and 656 may be accommodated in the second accommodating part 512. That is, the crossover gears 655 and 656 and the second helical gear parts 657 and 657a may be connected within the second receiving part 512.

The lower side of the screw 52, 52a penetrates the partition wall 513, and the second helical gear portions 657, 657a are coupled to the screws 52, 52a that have penetrated the partition wall 513 do.

One or more guide bars 53 and 54 for guiding the rise of the screw holders 56 and 56a may be provided in the housing 51. The one or more guide bars 53 and 54 extend in parallel with the screws 52 and 52a in a state spaced apart from the screws 52 and 52a.

A plurality of guide bars (53, 54) are provided in the housing (51) so that the screw holders (56, 56a) are not inclined to either right or left around the screws (52, 52a), the plurality of guides The screw 52 may be positioned between the bars 53 and 54.

The motor case 61 and the pair of housings 51 may be integrally formed. In addition, a single cover member 66 may cover the motor case 61 and the pair of housings 51.

That is, the cover member 66 is fastened to the motor case 61 to cover the power transmission unit, and is fastened to the pair of housings 51, the screw 52, 52a, the guide bar 53, 54), the screw holders 56 and 56a can be covered.

Of course, if necessary, the cover member 66 may be composed of a plurality of parts respectively shielding the power transmission unit and the screw units 50 and 50a to be configured to open and close each independently.

In the present embodiment, since the driving device 40 exists in the form of a single module, the driving device 40 is compact, so that the driving device 40 can be easily installed on the door part 31.

In addition, since a single cover member 66 covers the motor case 61 and the pair of housings 51 together, when the cover member 66 is separated, it is easily placed inside the power transmission unit or the housing 51. There is an advantage of being able to access, and service is easy.

Meanwhile, a lift detection device 55 may be provided in the screw unit 50a on one side of the screw units 50 and 50a on both left and right sides. Since the left and right screw units 50a are simultaneously operated by one motor assembly 60, even if the lifting detection device 55 is provided only on one screw unit 50a, the operation of the lifting device 80 is effectively performed. Can be detected. Therefore, the lift detection device 55 may be provided on either side of the left and right screw units 50 and 50a.

The elevating detection device 55 is for determining whether the elevating device 80 has completed elevating or not, and determines whether the elevating apparatus 80 has elevated or descended based on the operation of the driving device 40.

The lift detection device 55 may be mounted on the cover member 66 and may be disposed vertically along the screw unit 50a.

The lifting detection device 55 may include a support plate 551, detection sensors 552 and 553 mounted on the support plate 551, and a case 554 accommodating the support plate 551. .

The support plate 551 is formed in a plate shape, and is configured such that a pair of detection sensors 552 and 553 can be mounted on both sides. The support plate 551 may simply be formed of a plate-like material to which the detection sensors 552 and 553 can be fixedly mounted at a detection position. In addition, the support plate 551 may be a substrate on which the detection sensors 552 and 553 are mounted.

As the detection sensors 552 and 553, a sensor that detects the magnet 563 may be used. The detection sensor may be a Hall sensor that detects the position of a magnet. Of course, other sensors or devices for sensing the magnet 563 may be provided in place of the Hall sensor as needed.

In addition, in place of the magnet 563 and the Hall sensor, another configuration or device capable of detecting a specific position of the screw holder 56a may be used.

One of the detection sensors 552 and 553 is mounted at a position corresponding to the position of the magnet 563 when the lifting device 80 is raised, and the magnet 563 when the lifting device 80 is lowered. The other can be mounted at a position corresponding to the position of ). Accordingly, when any one of the pair of detection sensors 552 and 553 recognizes the magnet, the lifting device 80 determines that the ascending or descending is completed.

The support plate 551 on which the detection sensors 552 and 553 are mounted may be accommodated in the case 554. The case 554 may be a part of the cover member 66. The case 554 may be recessed from the inner surface of the cover member 66 and may provide a space in which the support plate 551 is accommodated. Of course, the case 554 may be configured separately and may have a structure mounted on the cover member 66.

The case 554 forms a space for accommodating the support plate 551. In addition, a connector 555 may be provided on the support plate 551. The connector 555 is configured such that wires extending from the pair of detection sensors 552 and 553 are connected, and the wire 555a can be connected from the outside. That is, the support plate 551 or the detection sensors 552 and 553 are not required to be separated, and the wires can be connected from the outside in a connector 555 coupling method.

When the support plate 551 is a substrate on which the detection sensors 552 and 553 are mounted, the connector 555 may be disposed on the support plate 551 corresponding to the connector mounting part 951.

11 is a perspective view of the drawer part. And, Figure 12 is an exploded perspective view of the drawer.

3, 11, and 12, the drawer part 32 is provided on the inside of the drawer body 38 and the drawer body 38 forming the overall shape of the drawer part 32. It may include a lifting device 80 capable of lifting the container and food, and a plurality of plates 391, 392, and 395 forming the inner exterior of the drawer part 32.

In detail, the drawer body 38 may be injection formed of a plastic material, and forms the overall shape of the drawer part 32. The drawer body 38 has a basket shape with an open top surface to form a food storage space therein. The rear surface of the drawer body 38 may be an inclined surface 321, so that interference with the machine room 3 may not occur.

The door frame 316 may be mounted on both sides of the drawer part 32. The door frame 316 may be coupled to the frame mounting portions 383 on both sides of the lower surface of the drawer unit 32 or the lower left and right sides of the drawer unit 32, and the door frame 316 is coupled to the drawer unit 32 The drawer part 32 and the door part 31 may be integrally coupled to be drawn in and out together.

The door frame 316 and the drawer unit 32 may be coupled to each other by a coupling structure by a separate coupling member or a fitting structure between the door frame 316 and the drawer unit 32.

Draw-out racks 34 may be provided on both left and right sides of the lower surface of the drawer part 32. The drawer part 32 may be withdrawn in the front and rear direction by the withdrawal rack 34. In detail, at least a portion of the drawer unit 32 is located inside the storage space while being mounted on the cabinet 10. In addition, the withdrawal rack 34 may be coupled to a pinion gear 141 provided on the bottom surface of the storage space. Accordingly, when the pull-out motor 14 is driven, the pinion gear 141 rotates to move the pull-out rack 34, and the drawer door 30 can be pulled out.

Rail mounting portions 382 on which draw-out rails 33 for guiding the draw-out of the drawer body 38 are mounted may be formed under both side surfaces of the drawer body 38. The rail mounting portion 382 extends from a front end to a rear end, and a space may be formed therein to accommodate the draw-out rail 33.

The draw-out rail 33 is a rail extending in multiple stages, one end may be fixed to the storage space inside the cabinet 10, the other end is fixed to the rail mounting portion 382 to the drawer door 30 It is possible to make the withdrawal in and out more stable.

Meanwhile, a magnet 380 may be provided on one of both side surfaces of the drawer body 38. In addition, a pull-in detection device 151 may be provided at a position corresponding to the position of the magnet 380 in a state in which the drawer door 30 is completely retracted. Accordingly, the pull-in detection device 151 detects the magnet 380 in a state in which the drawer door 30 is completely pulled in, and determines the completion of the pull-in of the drawer door 30. In addition, when the complete retraction of the drawer door 30 is detected, the retraction motor 14 may be stopped. The ingress detection device 151 may have a structure such as a switch, and various structures capable of detecting the ingress of the drawer door 30 may be possible.

Further, the drawer body 38 may be provided with a plurality of plates 391, 392, and 395 made of a plate-shaped metal material such as stainless steel to form at least a part of the interior and exterior of the drawer body 38.

In detail, outer side plates 391 may be provided on both left and right side surfaces outside the drawer body 38. The outer side plates 391 are mounted on both left and right sides of the drawer body 38 to form the exterior of both sides, and in particular, the door frame 316 and the draw-out rails mounted on both sides of the drawer body 38 ( 33) It can be prevented from being exposed to the outside.

A plurality of reinforcing ribs 384 may be formed on both sides of the outer surface of the drawer body 38 to intersect in the horizontal and vertical direction. The reinforcing rib 384 increases the strength of the drawer body 38 itself so that the drawer body 38 is more resistant to the weight of the door increased by the provision of the driving device 40 and the lifting device 80. It can be made to keep its shape firmly.

In addition, the reinforcing ribs 384 may support the outer side plates 391 mounted on both side surfaces, and thus, the appearance of the drawer part 32 may be maintained firmly.

Inner side plates 392 may be provided on both left and right sides of the drawer body 38 inside. The inner side plate 392 is mounted on both left and right side surfaces of the drawer body 38 and may form both left and right side surfaces of the drawer body 38.

The inner plate 395 may include a front portion 395a, a bottom portion 395b, and a rear portion 395c having sizes and shapes corresponding to the inner front, bottom, and rear surfaces of the drawer body 38.

The entire inner surface of the drawer body 38 may be formed by the inner side plate 392 and the inner plate 395, and the inner surface of the drawer body 38 may provide a metallic texture.

Therefore, the storage space inside the drawer 32 may have a metallic texture as a whole, and the food stored therein can be stored coldly in a more even area as a whole, as well as visually excellent cooling performance and storage performance for the user. Can provide.

The drawer cover 37 is bent at the upper end of the cover front part 371 and the cover front part 371 partitioning the inside of the drawer body 38 into a front space S1 and a rear space S2, It may include a cover upper surface portion 372 shielding the upper surface of the rear space (S2).

That is, when the drawer cover 37 is mounted, only the front space S1 in which the lifting device 80 is disposed may be exposed inside the drawer body 38, and the rear space S2 is the drawer. It can be shielded by the cover 37.

Meanwhile, an elevating device 80 may be provided inside the drawer body 38. The lifting device 80 has a structure that is connected to the driving device 40 so as to be able to move up and down, and both left and right sides may be raised and lowered uniformly.

In order to couple the lifting device 80 and the driving device 40, a drawer opening 35 is formed in the lower front surface of the drawer part 32.

On the other hand, the lifting device 80 is configured as a scissor type, and is folded in a lowered state, and unfolded in an elevated state so that the container or food seated on the upper surface is raised and lowered.

In addition, the lifting device 80 may include a support plate 81, and the support plate 81 may provide a seating surface of the container 36 or a surface on which food is seated.

Meanwhile, the height of the drawer opening 35 may be located at a position lower than the upper end of the lifting device 80, that is, the upper surface of the support plate 81. Accordingly, in the state in which the lifting device 80 is mounted, it is possible to prevent the drawer opening 35 from being visible to the inside of the drawer part 32 in any state.

In addition, the support plate 81 has a size and shape corresponding to the front space to prevent foreign matters from penetrating into the lifting device 80 provided below the front space S1, and the lifting device 80 By blocking access to ), safety accidents can be fundamentally prevented.

13 is a perspective view of a lifting device according to an embodiment of the present invention. 14 is a view showing a state in which the upper frame of the lifting device is raised. And, Figure 15 is a view showing a state in which the lever of the present invention is connected to the lifting device.

13 to 15, the lifting device 80 may be provided on the bottom of the inner side of the drawer part 32, and may be detachably provided inside the drawer part 32.

In addition, the lifting device 80 may include an upper frame 82 and a lower frame 83 and a scissor assembly 84 disposed between the upper frame 82 and the lower frame 83.

In detail, the upper frame 82 is formed in a rectangular frame shape corresponding to the size of the inner front space S1 of the drawer part 32, and the support plate 81 may be mounted on the upper surface.

The upper frame 82 is moved in the vertical direction of the lifting device 80 and substantially supports the food or container 36 together with the support plate 81.

The upper frame 82 may include a frame portion 821 forming a circumferential shape of the upper frame 82 as a whole, and a partition portion 822 partitioning the space inside the frame portion 821 into left and right sides. I can.

Since the frame portion 821 and the partition portion 822 are configured to form an outer frame and support the support plate 81, high strength is required. Accordingly, the frame portion 821 and the partition portion 822 are metal It may be formed of a material, and may be formed in a shape in which both ends are bent to increase strength and prevent deformation.

Further, a slide guide 824 for guiding the movement of the scissor assembly 84 may be formed on the lower side of the frame part 821 by receiving the end of the scissor assembly 84.

The scissor assembly 84 may be disposed in the spaces 823 and 824 on both sides of the partition 822, respectively.

The slide guide 824 may define a long hole 824a through which the scissor assembly 84 can pass. Accordingly, the scissor assembly 84 can be moved along the slide guide 824.

The lower frame 83 may have the same or similar structure to the upper frame 82 only in a direction different from that of the upper frame 82.

The lower frame 83 may include a frame portion and a partition portion. In addition, a slide guide 834 may be formed on the upper surface of the lower frame 83 to accommodate the end of the scissor assembly 84 to guide the movement of the scissor assembly 84.

The slide guide 834 may define a long hole 834a through which the scissor assembly 84 can pass. Accordingly, the scissor assembly 84 can be moved along the slide guide 834.

The scissor assembly 84 may be provided on both left and right sides, and both sides of the scissor assembly 84 are operated by receiving power from one of the lifting motors 64, and thus may be raised and lowered by the same height at the same time.

Therefore, even when supporting a heavy load, it can be effectively lifted and lowered by a pair of the scissors assembly 84, which is independently applied to both sides, and at this time, the scissors assembly 84 is the upper frame 82, that is, The support plate 81 may be elevated in a horizontal state.

The scissor assembly 84 may include a first scissor frame 841 in the form of a square frame, and a second scissor frame 845 in the form of a rectangular frame rotatably connected to the first scissor frame 841. have.

The left and right widths of the second scissor frame 845 may be smaller than the left and right widths of the first scissor frame 841. Accordingly, the second scissor frame 845 may be connected to the first scissor frame 841 while being positioned within an area formed by the first scissor frame 841.

The first scissor frame 841 may include a lower shaft (841a in FIG. 24) and an upper shaft (841b in FIG. 24) extending in a horizontal direction.

The lower shaft (841a in FIG. 24) is rotatably supported by the lower frame 83, and the upper shaft (841b in FIG. 24) is disposed to pass through the sliding guide 824 of the upper frame 82. .

The first scissor frame 841 may be connected to a first rod (852a in FIG. 24) and an upper shaft (841b in FIG. 24) extending in the vertical direction.

The second scissor frame 845 includes a lower shaft 851a and an upper shaft (not shown) extending in a horizontal direction, and a first rod 852a and a second rod 852b extending in the vertical direction. I can.

The first rod 842a of the first scissor frame 84 includes an extension 842b protruding to be connected to the lever 42, and a coupling portion 842c provided at an end of the extension 842b. It may include.

The lever 42 may include a receiving portion 421a accommodating the coupling portion 842c for coupling with the coupling portion 842c.

An end of the coupling portion 842c may be formed in a non-circular shape. Therefore, when the lever 42 is rotated while the coupling portion 842c is accommodated in the receiving portion 421a, the lever 42 can be prevented from spinning with the coupling portion 842a. .

The coupling part 842a and the extension part 842b may pass through the drawer opening 35, and the extension part 842b may be located on the drawer opening 35. Accordingly, the lifting device 80 inside the drawer part 32 may be connected to the driving device 40 outside the drawer part 32 by the extension part 842b and the coupling part 842a.

Hereinafter, a state in which the drawer door 30 of the refrigerator 1 according to an embodiment of the present invention having the above structure is pulled out and moved up and down will be described in more detail with reference to the drawings.

16 is a block diagram schematically illustrating a connection between a control unit and components connected to the control unit according to an embodiment of the present invention. And, Figure 17 is a flow chart showing the drawing in and out and lifting operation of the drawer door. In addition, FIGS. 18 to 26 are views showing a state of the drawer door in the drawer door withdrawal/lowering operation.

Referring to these drawings, the refrigerator 1 maintains a state in which both the rotary door 20 and the drawer door 30 are closed as shown in FIG. 18 in the food storage state. In this state, the user can store food by pulling out the drawer door 30.

The drawer door 30 may be provided with a plurality of upper and lower sides. The drawer door 30 provided at the lower portion of the drawer door 30 may be disposed adjacent to the upper drawer door 30 without a separate handle for drawing in and out. That is, a gap is hardly seen between the upper drawer door 30 and the lower drawer door 30, so that the front appearance of the refrigerator 1 can look very neat and luxurious.

In order to withdraw the drawer door 30 at the bottom, a user may input a draw-out operation of the drawer door by manipulating the operation unit.

At this time, the user can input the operation of the drawer door 30 through the manipulation of the plurality of manipulation units 214,301,302. In this case, when the manipulation units 214, 301, and 302 are manipulated, the proximity sensing device 213 recognizes the proximity of the user.

Therefore, only when any one of the manipulation units 214, 301, and 302 is operated in a state in which the user's proximity is recognized by the proximity sensing device 213, it is determined as a valid manipulation input and the drawer door 30 is to be pulled out. I can.

For example, when a user stands in front of the refrigerator 1 and operates the first operation unit 214, the proximity sensing device 213 generates a signal for detecting the proximity of the user, and the first operation unit Reference numeral 214 generates a user's manipulation signal. Accordingly, the control unit 90 may finally determine as an effective operation input for the operation of the drawer door 30, and allow the drawer door 30 to start withdrawal.

If the proximity sensing device 213 does not detect the user's proximity or if any one of the manipulation units 214, 301, and 302 is not input, the drawer door 30 is not opened. [S110: Operation input step]

When the control unit 90 for controlling the overall operation of the refrigerator 1 determines that the manipulation input is valid in the manipulation input step, the withdrawal motor 14 starts the operation of the withdrawal motor 14. Control.

When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled forward. The drawer door 30 may be withdrawn while the draw-out rail 33 is extended.

The draw-out rack 34 provided on the bottom surface of the drawer door 30 may be coupled with a pinion gear 141 that rotates when the draw-out motor 14 provided in the cabinet 10 is driven, and thus the The drawer door 30 is pulled in and out according to the driving of the pull-out motor 14.

The drawer door 30 may be pulled out until it becomes a state as shown in FIGS. 19 and 20. In this case, the draw-out distance of the drawer door 30 may be at least a distance in which the front space S1 inside the drawer part 32 can be completely exposed to the outside. Therefore, as shown in Figs. 19 and 20, when the drawer door 30 is completely pulled out, the door 20, 30 or the cabinet in which the container or food is disposed above when the lifting device 80 is elevated. (10) will not interfere.

Looking in more detail at the state in which the drawer door 30 is pulled out, when the drawer door 30 is pulled out for lifting, the front space S1 is completely pulled out of the lower storage space 12. It must be in a state.

In particular, the rear end (L1) of the front space (S1) must be in a state that is more pulled out than the front end (L2) of the cabinet 10 or the upper door 20, and prevent interference when the lifting device 80 is elevated. In order to prevent it, it must be located in front of the cabinet 10 or the front end L2 of the upper door 20 at least.

In addition, as shown in FIG. 20, the drawer door 30 may not be completely pulled out of the drawer part 32, and may be pulled out only to a position to avoid interference when the lifting device 80 is elevated. At this time, at least a portion of the rear space S2 of the drawer 32 is located inside the lower storage space 12. That is, the rear end L3 of the drawer part 32 is positioned at least inside the lower storage space 12.

Therefore, even when the weight of the drawer door 30 including the driving device 40 and the lifting device 80 is added to the weight of the storage object, the draw-out rail 33 or the drawer door 30 itself It is possible to ensure a stable withdrawal and lifting operation without sagging or damage of.

The draw-out distance of the drawer door 30 may be determined by the draw-out detection device 152 disposed in the cabinet 10 and/or the drawer door 30. The withdrawal detection device 152 and the pull-in detection device 151 may be collectively referred to as pull-out detection devices 151 and 152.

The withdrawal detection device 152 is located on one side of the drawer part 32 such as the draw-out rack 34 or the draw-out rail 33 so that the drawer door 30 can be completely pulled out. It may be composed of a detection sensor that senses the provided magnet 389.

For example, as illustrated, a magnet 389 may be provided on the bottom of the drawer part 32 and the withdrawal detection device 152 may be provided on the bottom surface of the cabinet 10. Also, the withdrawal detection device 152 may be provided at a position corresponding to a position of the magnet 389 in a state in which the drawer door 30 is completely withdrawn. Accordingly, the withdrawal state of the drawer door 30 may be determined by the withdrawal detection device 152.

If necessary, a switch is provided at a position where the drawer door 30 is completely retracted and a position at which the drawer door 30 is completely retracted, so that the drawer door 30 may be sensed, and the number of revolutions of the drawer door 30 may be counted , A sensor measuring the distance between the rear surface of the door part 31 and the front end of the cabinet 10 or counting the draw-out time of the drawer door 30 may detect the draw-out of the drawer door 30.

When the withdrawal detection device 152 detects that the drawer door 30 has been withdrawn to a set distance, the control unit 90 may determine that the withdrawal of the drawer door 30 has been completed, and the drawer door In order to complete the withdrawal of 30, the drive of the draw-out motor 14 is stopped. [S120: Drawer door withdrawal step]

In this case, in a state in which the drawer door 30 is pulled out, the pull-out motor 14 may be in a broken state so that it is no longer rotated. That is, while the lifting device 80 inside the drawer door 30 is operating, the drawer door 30 must be kept in a pulled-out state. To this end, the withdrawal motor 14 may be a motor (commonly referred to as a braking motor or a brake motor) provided with a brake capable of selectively restraining the motor.

For example, if the drawer door 30 is moved or closed while the lifting device 80 is being driven, there is a possibility of a safety accident. In addition, if the drawer door 30 flows or closes during the operation of the lifting device 80, a problem of falling or damage of the food being stored may occur, and a problem of damage to the structure for lifting or the refrigerator itself may occur. have. Therefore, the drawer door 30 should be able to maintain a fixed state in which no more withdrawal or entry is possible even if an external force is applied to the drawer door 30 while at least the operation of the lifting device 80 is performed.

The withdrawal motor 14 may be prevented from rotating even if an external force is applied by its own braking structure. Of course, if necessary, the drawer door 30 itself may be constrained so that the drawer door 30 is maintained in a pulled-out state. [S130: Door withdrawal and entry restraint step]

Meanwhile, the drive device 40 and the lifting device 80 are not operated until the drawer door 30 is completely pulled out as shown in FIGS. 19 and 20, and the lifting device 80 is It stays in its lowest state.

Before the lifting device 80 is raised, as shown in FIG. 21, the lever 42 and the screw holder are located at the lowest position, and the lifting detection device 55 detects this and the current state is determined by the lifting device. It is judged that (80) is in a fully lowered state.

In detail, when the lifting device 80 is completely lowered, the screw holder 56a may be positioned at the lowest position. In this case, the magnet 563 provided in the screw holder 56a is positioned at a position corresponding to the detection sensor 93 located below the pair of detection sensors 552 and 553. Accordingly, since the magnet 563 is sensed by the detection sensor 93 located below, the lifting device 80 may be determined to be completely lowered.

If it is determined that the lifting device 80 is in a completely lowered state by the lifting detection device 55, the driving device 40 may start the operation when the user's manipulation or the complete withdrawal of the drawer door 30 I can.

If the lifting detection device 55 determines that the lifting device 80 is not completely lowered, an abnormal signal may be output and the driving device 40 may not be operated.

When the drawer door 30 is pulled out by a set distance, the control unit 90 instructs the operation of the lifting motor 64. Then, the driving device 40 is operated by the lifting motor, and the lifting device 80 is raised as shown in FIG. 22.

When the drawer door 30 is completely pulled out and the pull-out motor 14 is stopped, the lift motor 64 may be driven by the control unit 90. The lifting device 80 may be configured to be operated only in a situation in which the drawer door 30 is sufficiently pulled out to ensure the safe lifting of the food or container 36 seated in the lifting device 80.

That is, when the drawer door 30 is pulled out and the front space S1 is completely exposed to the outside, the lifting device 80 is operated, and the container 36 seated on the lifting device 80 or stored food It is possible to prevent interference with the other doors 20 and 30 or the cabinet 10.

In addition, in order to prevent damage to the user's safety and stored food, the operation of the lifting device 80 may be started after a set time has elapsed after the withdrawal of the drawer door 30 is confirmed.

In this embodiment, the lifting of the lifting device 80 means that the upper frame 82 is raised by the scissor assembly 84, and the descending of the lifting device 80 is caused by the scissor assembly 84. This means that the upper frame 82 is lowered.

The driving device 40 is in a state connected to the lifting device 80, and thus, power can be transmitted to the lifting device 80. With the start of the operation of the driving device 40, power is transmitted to the lifting device 80, and the lifting device 80 starts to ascend.

In detail, when the lifting motor 64 rotates forward and backward by the lifting or descending signal of the lifting device 80, the driving device 40 starts the operation. Driven by the lifting motor 64 rotates a plurality of gears between the lifting motor 64 and the screws 52 and 50a, thereby rotating the screws 52 and 50a. As the screws 52 and 50a on both sides are rotated, the screw holders 56 and 56a rise and the lever 42 is rotated.

When the lever 42 is moved upward, the height of the first rod 842a of the first scissor frame 84 connected to the lever 42 increases by increasing the height of the lever 42. Further, the scissor assembly 84 can be unfolded by increasing the height of the first rod 842a of the first scissor frame 84.

Eventually, as the scissor assembly 84 is unfolded, the upper frame 82 rises, and the container 36 or food seated on the support plate 81 rises, and finally, as shown in FIG. 23 The lifting device 80 is raised to the maximum height.

Meanwhile, the lifting device 80 is stopped when it is raised to a sufficient height to facilitate access to the food or container 36 mounted on the lifting device 80 as shown in FIG. 23. In such a state, the user can easily lift the food or container 36 without excessively bowing the waist. [S140: elevating device rising step]

When the lifting device 80 is lifted, the lever 42 and the screw holder are located at the highest positions, and the lifting detection device 55 detects this and the current state is determined by the lifting device 80 It is judged to be in a completely elevated state.

When it is determined by the lifting detection device 55 that the lifting device 80 is in a fully raised state as shown in FIG. 24, the lifting motor 64 is stopped. In such a state, the lifting device 80 is located inside the drawer part 32, but the food or container 36 seated in the lifting device 80 is more than the opened upper surface of the drawer part 32. It can be located in a high position, allowing easy access by the user.

In particular, since it is not necessary to bend the waist excessively for lifting the container 36, a safer and more convenient operation is possible.

Looking in more detail with reference to FIG. 23 for the state in which the lifting device 80 is raised to the maximum, the lifting device 80 is positioned at least at a position lower than the upper end of the drawer part 32.

When the container 36 is seated in the driving device 80 and viewed from the container 36, the upper end H1 of the container 36 is the upper end H2 of the lower storage space 12. ) Can be raised to a higher position. The height at this time is such that the user can reach out and lift the container 36 without bending the waist, and may be the most suitable height for use.

That is, the driving device 40 has a structure that is lifted from the inside of the drawer part 32, but the container 36 is in a state in which the container 36 is seated in the lifting device 80. It can be located at a height that is easily accessible. [S150: Stopping the elevator device]

And, when the lifting device 80 reaches a set height, the lifting motor 64 is stopped, and the timer 91 counts the stop time of the lifting motor 64. That is, in a state in which the lifting device 80 has been lifted, the lifting device 80 waits for a set time.

The control unit 90 determines whether the time counted by the timer 91 reaches a set time. If the control unit 90 determines that the set time has elapsed after the lifting device 80 is stopped, the lifting motor 64 starts reverse rotation and the lifting device 80 descends.

In this case, the setting time may be set to approximately 90 seconds. The set time may be set to a time sufficient for the user to store food. If the set time is too short, the lifting device 80 may descend before completing the storage of food, causing inconvenience in use.If the set time is too long, the drawer door 30 is exposed for a long time in an open state. As a result, the loss of cold air may become excessive, and there may be problems in that cooling performance is deteriorated and power consumption is increased. Accordingly, the setting period may be set to about 90 seconds or less.

Of course, the setting time may be set by the user through manipulation of the display 211 or a voice input through the microphone 93, and may be adjusted to an appropriate time desired by the user.

In addition, the elapse of the set time may be displayed on the screen through the display 211 or externally output through the speaker 92 while the lifting device 80 is stopped and waiting. Accordingly, the user may recognize a change in the set time and perform a food storage operation, and may determine when the drawer door 30 is closed. [S161: Step of judging the elapse of the set time]

On the other hand, when the user wants to close the drawer door 30 by completing the food storage operation before the set time has elapsed, the lifting device 80 is lowered by manipulating any one of the operation units 214, 301, and 302. Operation can be entered.

In addition, the user can determine the remaining time until the drawer door 30 is closed through the screen output from the display 211 or the voice output from the speaker 92, and accordingly, the food storage operation speed Can be determined. And, even when the remaining time remains until the drawer door 30 is closed, any one of the manipulation units 214, 301, 302 is operated to lower the lifting device 80 and the drawer door 30 is retracted. You can also force the operation.

That is, in the elevated state of the lifting device 80, before the set time elapses, the user inputs a manipulation input of any one of the manipulation units 214, 301, and 302 in order to lower the lifting device 80 and retract the drawer door 30. Is done. [S162: Lowering operation input step]

When the set time elapses or the lowering operation is input, the control unit 90 instructs the operation of the lifting motor 64, and the lifting device 80 starts to descend as shown in FIG. 25.

The descending of the lifting device 80 may be performed by reverse rotation of the lifting motor 64, and may be gradually performed through a process opposite to the lifting process of the lifting device 80 described above.

In addition, when the lifting device 80 is finished descending as shown in FIG. 20, the lifting device 55 detects the completion of descending of the lifting device 80. That is, when the magnet 563 is detected by the detection sensor 93 located below, the control unit 90 determines that the lifting device 80 is descending and stops driving the lifting motor 64. . [S170: step of descending the elevator device]

When the lowering completion signal of the lifting device 80 is received, the control unit 90 simultaneously releases the restraint of the withdrawal motor 14. The control unit 90 may release the braking of the draw-out motor 14 or release the restraint of the drawer door 30 so that the drawer door 30 is in a retractable state. That is, the control unit 90 completely restrains the withdrawal of the drawer door 30 until the lifting device 80 is lowered so that the lifting operation of the lifting device 80 is stably performed, and at the same time, food is stored. The work also makes it easy and safe to perform. [S180: Step of releasing restraint for door withdrawal]

In addition, when the braking of the draw-out motor 14 is released, the controller 90 instructs the draw-out motor 14 to rotate in reverse. The drawer door 30 may be pulled in as shown in FIG. 26 by the reverse rotation of the pull-out motor 14. [S190: Drawer door retracting step]

The withdrawal motor 14 rotates in reverse until the drawer door 30 is completely closed. As shown in FIG. 18, when the drawer door 30 is completely closed, it is possible to detect the completion of the retraction of the drawer door 30 by the retraction detection device 151. In addition, when the drawer door 30 is retracted, the standby state is maintained so that the drawer door 30 can be opened again.

In addition, the control unit 90 controls the devices constituting the refrigeration cycle to continuously maintain the standby state until a user's manipulation is input and to perform an operation for cooling the interior of the container.

Meanwhile, the present invention may further include various other control methods in addition to the above-described control method. Hereinafter, various control methods of a refrigerator according to an embodiment of the present invention will be described.

Hereinafter, other control methods of the refrigerator will be described in detail with reference to the drawings. Among the steps of the control method to be described below, steps identical to those of the above-described control method are denoted by the same reference numerals, and detailed descriptions thereof will be omitted. In addition, at least one or more of the following control methods may be combined with each other.

The drawer door 30 stops for a set time while the lifting device 80 is raised, and the set time at this time can be adjusted by the user. Hereinafter, a control method for adjusting the set time will be described in more detail.

27 is a flowchart showing an operation for adjusting the waiting time of the lifting state of the lifting device.

As shown, the user can input the operation of the drawer door 30 through at least one of the manipulation units 214, 301, and 302 for the drawer door 30 to be pulled out and inserted. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, only when any one of the manipulation units 214, 301, and 302 is operated in a state in which the user's proximity is recognized by the proximity sensing device 213, it is determined as a valid manipulation input and the drawer door 30 is to be pulled out. I can.

On the other hand, before the operation for withdrawal of the drawer door 30, the user can set the set time to wait while the lifting device is raised by manipulating the display 211. The user can set by entering an appropriate setting time according to the usage environment and pattern. [S110: Operation input step]

When a valid user's manipulation is input, the control unit 90 controls the draw-out motor 14 to start the operation of the draw-out motor 14. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled out to the front, and is pulled out until a state as shown in Figs. 19 and 20, and then stopped. do. In this case, the withdrawal detection device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

And, although not shown, as the drawer door pull-out step is completed, the pull-out motor 14 may be constrained by a brake, and the door pull-out restriction step may be further performed as in the above-described embodiment. have.

On the other hand, when the drawer door 30 is pulled out by a set distance, the control unit 90 instructs the operation of the lifting motor 64. Then, the driving device 40 is operated by the lifting motor 64, and the lifting device 80 is raised. [S140: elevating device rising step]

The lifting device 80 is stopped when it is raised to a sufficient height to facilitate access to the food or container 36 seated on the lifting device 80 as shown in FIG. 23. In such a state, the user can easily lift the food or container 36 without excessively bowing the waist. [S150: Stopping the elevator device]

And, when the lifting device 80 reaches a set height, the lifting motor 64 is stopped, and the timer 91 counts the stop time of the lifting motor 64. That is, in a state in which the lifting device 80 has been lifted, the lifting device 80 waits for a set time.

In addition, the elapse of the set time may be displayed on the screen through the display 211 or externally output through the speaker 92 while the lifting device 80 is stopped and waiting. Accordingly, the user may recognize a change in the set time and perform a food storage operation, and may determine when the drawer door 30 is closed. [S161: Step of judging the elapse of the set time]

On the other hand, there may be a situation in which the elevating device 80 must be maintained in an elevated state for a longer time than a set time depending on the situation while the user is receiving food. In such a situation, the user may be able to arbitrarily adjust the set time through manipulation of the operation units 214,301, and 302. [S163: Setting time operation input step]

That is, when it is thought that the increase of the set time is necessary while the lifting device 80 is waiting to rise, the user manipulates the operation units 214, 301, and 302 so that the lifting device 80 is elevated and the drawer door ( 30) can be kept open.

For example, when the user manipulates the manipulation units 214,301,302, counting for the increase in the set time may be stopped, and the user manipulates the manipulation units 214,301,302 again while the food is stored, Counting may be started or the lowering operation input step as described above may be performed.

In addition, the set time itself may be increased by the user manipulating the manipulation units 214,301, and 302. The setting time may be increased or initialized in steps according to the number or time of pressing the manipulation units 214, 301, and 302 so that the setting time may be substantially increased. At this time, the increased setting time is one-time, and after the drawer door 30 is completely retracted, it may be reset to the initially set setting time. Of course, it may also be possible to reduce the setting time through the manipulation of the manipulation units 214, 301, and 302.

Meanwhile, the manipulation units 214, 301, and 302 may be configured to enable input by a touch or press operation. In addition, the manipulation units 214, 301, and 302 may include a microphone 93 or a microphone module capable of recognizing voice, and a user may conveniently manipulate the increase or decrease of the set time through voice during a food storage operation.

In addition, the elapsed state of the set time as well as the reset state of the set time by the user may be output through the display 211 or the speaker 92 to be fed back to the user. [S200: Setting time reset step]

When the set time elapses or the lowering operation is input, the control unit 90 instructs the operation of the lifting motor 64, and the lifting device 80 is lowered. In addition, when the lifting device 80 is lowered as shown in FIG. 20, the controller 90 stops driving the lifting motor 64. [S170: step of descending the elevator device]

On the other hand, although not shown, when the lowering of the lifting device is completed, the above-described door pull-out restraint release step may be performed so that the pull-out motor 14 is in a rotatable state.

And, in a state in which the lifting device 80 is completely lowered and the lifting motor 64 is stopped, the control unit 90 drives the drawer door 30 so that the drawer door 30 is retracted. I can. The pull-out motor 14 is operated until the state as shown in FIG. 18 is reached, and the drawer door 30 is completely closed. [S190: Drawer door retracting step]

Meanwhile, in the drawer door 30, the drawer door 30 may be automatically withdrawn and moved in a single operation according to the user's setting, and the withdrawal and lifting may be performed by each individual operation. . Hereinafter, a method of controlling an operation according to the setting of the drawer door 30 will be described.

28 is a flow chart showing an operation for performing a pull-out and elevating operation of the drawer door by a user's individual operation.

As shown, the user may set the operation mode of the drawer door 30 before opening and closing the drawer door 30. That is, the user may set the operation of the automatic lifting or lowering mode through the manipulation of the display 211.

If the automatic lifting mode is set through the manipulation of the display 211, the drawer door 30 can be automatically moved in and out of the drawer by manipulating the manipulation units 214, 301, and 302 once.

In the case of the automatic lifting mode, the same operation as in FIGS. 17 and 27 can be performed.

On the other hand, in the case of setting to the manual lifting mode through the manipulation of the display 211, the drawer door 30 is pulled out and opened by the user's manipulation, and the lifting device 80 is raised by the user's additional manipulation. And after being lowered, the drawer door 30 is closed.

In this way, the user may preset an operation mode of the drawer door 30 desired by the user through the display 211 before using the drawer door 30. In addition, whenever the operation units 214, 301, and 302 are operated, the drawer door 30 may be operated in a previously set operation mode. [S300: Operation mode setting step]

In the case where the automatic operation mode is set in the operation mode setting step, the operation as shown in FIGS. 17 and 27 can be performed, and a detailed description thereof will be omitted.

Hereinafter, when the operation mode setting step is set to the manual operation mode, the operation of the drawer door 30 will be described.

In order to withdraw/exit the drawer door 30 at the bottom, the user can input the operation of the drawer door 30 through at least one of the manipulation units 214, 301, and 302. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, only when any one of the manipulation units 214, 301, and 302 is operated in a state in which the user's proximity is recognized by the proximity sensing device 213, it is determined as a valid manipulation input and the drawer door 30 is to be pulled out. I can.

On the other hand, before the operation for withdrawal of the drawer door 30, the user can set the set time to wait while the lifting device is raised by manipulating the display 211. The user can set by entering an appropriate setting time according to the usage environment and pattern. [S110: Operation input step]

When a valid user's manipulation is input, the control unit 90 controls the draw-out motor 14 to start the operation of the draw-out motor 14. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled out to the front, and is pulled out until a state as shown in Figs. 19 and 20, and then stopped. do. In this case, the withdrawal detection device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

Meanwhile, in a state in which the drawer door 30 is pulled out, the user may input the operation of the lifting device 80 by re-operating the manipulation units 214, 301, and 302. When the lifting operation of the lifting device 80 is input while the drawer door 30 is pulled out, the control unit 90 causes the lifting device 80 to rise. [S311: step of determining the lifting operation input]

On the other hand, in a state in which the drawer door 30 has been withdrawn, the user may input an operation of closing the drawer door 30 by re-operating the manipulation units 214, 301, and 302. When the user only wants to open the drawer door 30 to check the food inside, since there is no need to lift the lifting device 80, the drawer door 30 can be closed. When an operation of closing the drawer door 30 is input by the control unit 90, the drawer door 30 may be closed by performing a retracting step of the drawer door 30. [S312: Close operation input step]

On the other hand, when a user inputs an operation of lifting the lifting device 80, the controller 90 raises the lifting device 80. In this case, the withdrawal motor 14 may be restrained by a brake, and the door withdrawal restraint step may be further performed as in the above-described embodiment.

In a state in which the withdrawal and inlet motor 14 is constrained, the control unit 90 instructs the operation of the lifting motor 64. Then, the driving device 40 is operated by the lifting motor 64, and the lifting device 80 is raised. [S140: elevating device rising step]

The lifting device 80 is stopped when it is raised to a sufficient height to facilitate access to the food or container 36 seated on the lifting device 80 as shown in FIG. 23. In such a state, the user can easily lift the food or container 36 without excessively bowing the waist. [S150: Stopping the elevator device]

And, when the lifting device 80 reaches a set height, the lifting motor 64 is stopped, and the timer 91 counts the stop time of the lifting motor 64. That is, in a state in which the lifting device 80 has been lifted, the lifting device 80 waits for a set time.

In addition, the elapse of the set time may be displayed on the screen through the display 211 or externally output through the speaker 92 while the lifting device 80 is stopped and waiting. Accordingly, the user may recognize a change in the set time and perform a food storage operation, and may determine when the drawer door 30 is closed. [S161: Step of judging the elapse of the set time]

On the other hand, when the user wants to close the drawer door 30 by completing the food storage operation before the set time has elapsed, the lifting device 80 is lowered by manipulating any one of the operation units 214, 301, and 302. Operation can be entered.

In addition, the user can determine the remaining time until the drawer door 30 is closed through the screen output from the display 211 or the voice output from the speaker 92, and accordingly, the food storage operation speed Can be determined. And, even when the remaining time remains until the drawer door 30 is closed, any one of the manipulation units 214, 301, 302 is operated to lower the lifting device 80 and the drawer door 30 is retracted. You can also force the operation.

That is, in the elevated state of the lifting device 80, before the set time elapses, the user inputs a manipulation input of any one of the manipulation units 214, 301, and 302 in order to lower the lifting device 80 and retract the drawer door 30. Is done. [S162: Lowering operation input step] Of course, before the set time elapses, the set time adjustment step may be performed to further maintain the open state of the drawer door 30.

When the set time elapses or the lowering operation is input, the control unit 90 instructs the operation of the lifting motor 64, and the lifting device 80 is lowered. In addition, when the lifting device 80 is lowered as shown in FIG. 20, the controller 90 stops driving the lifting motor 64. [S170: step of descending the elevator device]

On the other hand, although not shown, when the lowering of the lifting device is completed, the above-described door pull-out restraint release step may be performed so that the pull-out motor 14 is in a rotatable state.

And, in a state in which the lifting device 80 is completely lowered and the lifting motor 64 is stopped, the control unit 90 drives the drawer door 30 so that the drawer door 30 is retracted. I can. The pull-out motor 14 is operated until the state as shown in FIG. 18 is reached, and the drawer door 30 is completely closed. [S190: Drawer door retracting step]

Of course, if necessary, the user may allow only the drawer door 30 to be pulled in/out when the manipulation units 214, 301, and 302 are manipulated through the manipulation of the display 211 and the lifting device 80 may be deactivated.

When a failure of the lifting device 80 or the user does not want to use the lifting device 80, this may be set through the display 211. That is, the drawer door 30 can be set to any one of a pull-out mode, an automatic lift mode, and a manual lift mode.

Meanwhile, when the drawer door 30 is opened by a user's manipulation, the drawer door 30 is completely pulled out and then stopped, or the drawer door 30 is completely pulled out and stopped in an elevated state.

Therefore, it is necessary to check the drawer door 30 and close the drawer door 30 during the withdrawal process. In particular, when the drawer door 30 is in a mode in which the drawer door 30 is automatically pulled out and moved up and down, once the drawer door 30 is opened, the lifting device 80 must be lifted up and down, so only simple confirmation by opening the drawer door 30 If you want, you may end up doing unnecessary work. Hereinafter, a method of controlling the drawer door 30 for preventing such a problem will be described.

29 is a flowchart illustrating an operation of closing the drawer door again after being withdrawn.

As shown, the user can input the operation of the drawer door 30 through at least one of the manipulation units 214, 301, and 302 for the drawer door 30 to be pulled out and inserted. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, only when any one of the manipulation units 214, 301, and 302 is operated in a state in which the user's proximity is recognized by the proximity sensing device 213, it is determined as a valid manipulation input and the drawer door 30 is to be pulled out. I can. [S110: Operation input step]

When a valid user's manipulation is input, the control unit 90 controls the draw-out motor 14 to start the operation of the draw-out motor 14. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled out to the front, and is pulled out until a state as shown in Figs. 19 and 20, and then stopped. do. In this case, the withdrawal detection device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

In a state in which the drawer door 30 is being pulled out, the user can input the stop of the drawer door 30 by manipulating the manipulation units 214, 301, and 302. [S400: Drawer door stop input] When the drawer door 30 is pulled out due to a user's misoperation, or when the drawer door 30 is opened to a desired point only for simple confirmation, the operation unit 214,301,302 is operated. The draw-out motor 14 may be stopped and the draw-out of the drawer door 30 may be stopped. [S410: Stopping the withdrawal/inflow motor]

With the drawer door 30 open, the timer 91 counts the time the drawer door 30 is open. In addition, when it is determined that the drawer door 30 is open for more than a set time, the control unit 90 causes the drawer door 30 to be closed. [S421: Step of judging the elapse of the set time]

On the other hand, if the user has completed checking the inside of the drawer door 30 in a state in which the set time has not elapsed, a closing operation of the drawer door 30 may be input by manipulating the operation units 214, 301, and 302. The control unit 90 may cause the drawer door 30 to be closed by the manipulation of the manipulation units 214, 301, and 302. [S422: Drawer door closing input determination step]

Meanwhile, in a state in which the set time has not elapsed, the user may push the drawer door 30 to close it. At this time, the user does not need to push the drawer door 30 to completely close, and pushes the drawer door 30 to generate a load larger than the size set in the reverse rotation direction (the direction opposite to the rotation direction when drawing out). In a cycle, the controller 90 detects this and rotates the drawer door 30 so that the drawer door 30 is closed. [S423: Drawer door push input determination step]

That is, when the drawer door 30 is stopped during withdrawal by a user's stop input, a set time has elapsed, a closing operation through the operation units 214,301,302 is input, or the drawer door 30 is pushed and closed. When an operation is input, the control unit 90 may reversely rotate the drawer door 30 so that the drawer door 30 can be closed so that the drawer door 30 is completely closed as shown in FIG. 18. [S190: Drawer door retracting step]

When there is no operation of the operation units 214, 301, and 302 for stopping the door while the drawer door 30 is being pulled out, the operation of the drawer door 30 may be performed in an automatic lifting mode or a manual lifting mode. [S440: elevating operation stage]

Meanwhile, a situation in which the refrigerator 1 is unable to operate normally may occur due to an obstacle during the withdrawal of the drawer door or during elevation. Hereinafter, a method of controlling the drawer door 30 when the obstacle is recognized will be described.

30 is a flowchart illustrating an operation when an obstacle is recognized during withdrawal of the drawer door.

As shown, the user can input the operation of the drawer door 30 through at least one of the manipulation units 214, 301, and 302 for the drawer door 30 to be pulled out and inserted. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, only when any one of the manipulation units 214, 301, and 302 is operated in a state in which the user's proximity is recognized by the proximity sensing device 213, it is determined as a valid manipulation input and the drawer door 30 is to be pulled out. I can. [S110: Operation input step]

When a valid user's manipulation is input, the control unit 90 controls the draw-out motor 14 to start the operation of the draw-out motor 14. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled out to the front, and is pulled out until a state as shown in Figs. 19 and 20, and then stopped. do. In this case, the withdrawal detection device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

If the drawer door 30 is unable to perform the normal withdrawal completion while the drawer door 30 is being pulled out, the control unit 90 determines that the obstacle has been recognized. For example, when an object or a person's body is located on the path through which the drawer door 30 is pulled out, food is caught between the drawer doors 30, or structural damage to the drawer door 30, etc. When the drawer door 30 is withdrawn due to a cause, it may be determined as an obstacle or an obstacle.

The control unit 90 normally pulls out the drawer door 30 due to an obstacle when the drawer door 30 is not pulled out within a set time, or when a load greater than the load set on the pull-out motor 14 is applied. It is judged that this is impossible.

On the other hand, if the controller 90 determines that the failure condition is, the failure condition may be immediately output through the display 211 or the speaker 92. Therefore, it is possible to induce immediate action by the user. [S500: Disability judgment step]

When the control unit 90 determines that an obstacle has occurred, the control unit 90 stops the operation of the withdrawal/retracting motor 14. When the draw-out motor 14 is continuously operated, damage to food, a safety problem for the user may occur, or damage to the refrigerator itself may be caused, so that the control unit 90 controls the draw-out motor 14 Will stop. When the drawer door is stopped, the user can remove the obstacle or the obstacle. [S510: In/out motor stop step]

When the drawer door 30 is partially opened, the timer 91 counts the time the drawer door 30 is open. In addition, when it is determined that the drawer door 30 is open for more than a set time, the control unit 90 causes the drawer door 30 to be closed. When the user removes the obstacle or resolves the obstacle, the drawer door may be closed when the set time elapses. [S521: Determining the elapse of the set time]

In addition, when the user removes the obstacle or resolves the obstacle in a state in which the set time has not elapsed, a closing operation of the drawer door 30 may be input by manipulating the operation units 214, 301, and 302. The control unit 90 may cause the drawer door 30 to be closed by the manipulation of the manipulation units 214, 301, and 302. [S522: Drawer door closing input determination step]

In addition, when the user removes the obstacle or solves the obstacle situation in a state in which the set time has not elapsed, the drawer door 30 may be pushed to close. At this time, the user does not need to push the drawer door 30 to be completely closed, and pushes the drawer door 30 to generate a load larger than the size set in the reverse rotation direction (the direction opposite to the rotation direction when pulling out). As long as the cycle is performed, the controller 90 detects this and rotates the drawer door 30 so that the drawer door 30 is closed. [S523: Drawer door push input determination step]

That is, when the drawer door 30 is stopped while being pulled out by an obstacle, a set time elapses, a closing operation through the operation units 214,301, 302 is input, or a closing operation is input by pushing the drawer door 30 In this case, the control unit 90 may reversely rotate the drawer door 30 so that the drawer door 30 can be closed so that the drawer door 30 is completely closed as shown in FIG. 18. [S530: Drawer door retracting step]

On the other hand, when the user removes the obstacle or solves the obstacle situation in a state in which the set time has not elapsed, the drawer door 30 may be pulled to open. [S523: Drawer door pull input determination step] At this time, the user does not need to push the drawer door 30 to completely close, and the size set in the direction of rotation (the direction in which the drawer is rotated) by the withdrawal motor 14 As long as the above load is pushed to occur, the controller 90 detects this and rotates the drawer door 30 to open the drawer door 30. [S540: Additional drawer door step]

In addition, when the drawer door 30 is pulled out, the operation of the drawer door 30 may be performed in an automatic lifting mode or a manual lifting mode. [S550: elevating operation stage]

31 is a flow chart showing an operation when an obstacle is recognized during retraction of the drawer door.

As shown, the user can input the operation of the drawer door 30 through at least one of the manipulation units 214, 301, and 302 for the drawer door 30 to be pulled out and inserted. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, only when any one of the manipulation units 214, 301, and 302 is operated in a state in which the user's proximity is recognized by the proximity sensing device 213, it is determined as a valid manipulation input and the drawer door 30 is to be pulled out. I can. [S110: Operation input step]

When a valid user's manipulation is input, the control unit 90 controls the draw-out motor 14 to start the operation of the draw-out motor 14. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled out to the front, and is pulled out until a state as shown in Figs. 19 and 20, and then stopped. do. In this case, the withdrawal detection device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

And, although not shown, as the drawer door pull-out step is completed, the pull-out motor 14 may be constrained by a brake, and the door pull-out restriction step may be further performed as in the above-described embodiment. have.

On the other hand, when the drawer door 30 is pulled out by a set distance, the control unit 90 instructs the operation of the lifting motor 64. Then, the driving device 40 is operated by the lifting motor 64, and the lifting device 80 is raised. [S140: elevating device rising step]

The lifting device 80 is stopped when it is raised to a sufficient height to facilitate access to the food or container 36 seated on the lifting device 80 as shown in FIG. 23. In such a state, the user can easily lift the food or container 36 without excessively bowing the waist. [S150: Stopping the elevator device]

The control unit instructs the operation of the lifting motor 64 when a set time elapses or a descending signal of the lifting device is input, and the lifting device 80 descends. In addition, when the lifting device 80 is lowered as shown in FIG. 20, the controller 90 stops driving the lifting motor 64. [S170: step of descending the elevator device]

On the other hand, although not shown, when the lowering of the lifting device is completed, the above-described door pull-out restraint release step may be performed so that the pull-out motor 14 is in a rotatable state.

If the drawer door 30 is unable to complete the normal retraction while the drawer door 30 is being retracted in progress, the controller 90 determines that an obstacle has been recognized. For example, when an object or a person's body is located on the path through which the drawer door 30 is pulled out, food is caught between the drawer doors 30, or structural damage to the drawer door 30, etc. When the drawer door 30 is retracted due to a cause, it may be determined as an obstacle or an obstacle.

The control unit 90 normally pulls in the drawer door 30 by an obstacle when the drawer door 30 is not pulled in within a set time, or when a load greater than the set load is applied to the pull-out motor 14. It is judged that this is impossible.

On the other hand, if the controller 90 determines that the failure condition is, the failure condition may be immediately output through the display 211 or the speaker 92. Therefore, it is possible to induce immediate action by the user. [S600: Disability judgment step]

When the control unit 90 determines that an obstacle has occurred, the control unit 90 stops the operation of the withdrawal/retracting motor 14. When the draw-out motor 14 is continuously operated, damage to food, a safety problem for the user may occur, or damage to the refrigerator itself may be caused, so that the control unit 90 controls the draw-out motor 14 Will stop. When the drawer door is stopped, the user can remove the obstacle or the obstacle. [S610: In/out motor stop step]

When the drawer door 30 is partially opened, the timer 91 counts the time the drawer door 30 is open. In addition, when it is determined that the drawer door 30 is open for more than a set time, the control unit 90 causes the drawer door 30 to be closed. When the user removes the obstacle or resolves the obstacle, the drawer door may be closed when the set time elapses. [S621: Step of judging the elapse of the set time]

In addition, when the user removes the obstacle or resolves the obstacle in a state in which the set time has not elapsed, a closing operation of the drawer door 30 may be input by manipulating the operation units 214, 301, and 302. The control unit 90 may cause the drawer door 30 to be closed by the manipulation of the manipulation units 214, 301, and 302. [S622: Drawer door closing input determination step]

In addition, when the user removes the obstacle or solves the obstacle situation in a state in which the set time has not elapsed, the drawer door 30 may be pushed to close. At this time, the user does not need to push the drawer door 30 to completely close, and pushes the drawer door 30 to generate a load larger than the size set in the reverse rotation direction (the direction opposite to the rotation direction when drawing out). In a cycle, the controller 90 detects this and rotates the drawer door 30 so that the drawer door 30 is closed. [S623: Drawer door push input determination step]

That is, when the drawer door 30 is stopped during retraction due to an obstacle, a set time elapses, a closing operation is input through the operation units 214,301, 302, or a closing operation is input by pushing the drawer door 30 In this case, the control unit 90 may reversely rotate the drawer door 30 so that the drawer door 30 can be closed so that the drawer door 30 is completely closed as shown in FIG. 18. [S630: Drawer door retracting step]

On the other hand, when the user attempts to solve the failure situation by reopening the door in a state in which the set time has not elapsed, the drawer door 30 may be pulled and opened. [S523: Drawer door pull input determination step] At this time, the user does not need to push the drawer door 30 to completely close, and the size set in the direction of rotation (the direction in which the drawer is rotated) by the withdrawal motor 14 As long as the above load is pushed to occur, the controller 90 detects this and rotates the drawer door 30 to open the drawer door 30. [S540: Additional drawer door step]

32 is a flowchart illustrating an operation when an obstacle is recognized during ascent of the lifting device.

As shown, the user can input the operation of the drawer door 30 through at least one of the manipulation units 214, 301, and 302 for the drawer door 30 to be pulled out and inserted. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, only when any one of the manipulation units 214, 301, and 302 is operated in a state in which the user's proximity is recognized by the proximity sensing device 213, it is determined as a valid manipulation input and the drawer door 30 is to be pulled out. I can. [S110: Operation input step]

When a valid user's manipulation is input, the control unit 90 controls the draw-out motor 14 to start the operation of the draw-out motor 14. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled out to the front, and is pulled out until a state as shown in Figs. 19 and 20, and then stopped. do. In this case, the withdrawal detection device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

And, although not shown, as the drawer door pull-out step is completed, the pull-out motor 14 may be constrained by a brake, and the door pull-out restriction step may be further performed as in the above-described embodiment. have.

On the other hand, when the drawer door 30 is pulled out by a set distance, the control unit 90 instructs the operation of the lifting motor 64. Then, the driving device 40 is operated by the lifting motor 64, and the lifting device 80 is raised. [S140: elevating device rising step]

In a state in which the ascent of the lifting device 80 is in progress, if the lifting device 80 cannot perform the normal ascent completion, the controller 90 determines that an obstacle has been recognized. For example, various causes, such as when an object or a person's body is located on the path through which the lifting device 80 is elevated, food is caught between the drawer doors 30, or structural damage of the drawer door 30 As a result, it may be determined as an obstacle or an obstacle when the lifting device 80 rises.

When the lifting device 80 fails to complete the ascent within a set time, or if a load greater than the set load is applied to the lifting motor 64, the normal ascent of the lifting device 80 is caused by an obstacle. It is judged as impossible.

On the other hand, if the controller 90 determines that the failure condition is, the failure condition may be immediately output through the display 211 or the speaker 92. Therefore, it is possible to induce immediate action by the user. [S700: Disability judgment step]

When the control unit 90 determines that an obstacle has occurred, the control unit 90 stops the operation of the lift motor 64. When the lift motor 64 is continuously operated, the control unit 90 stops the lift motor 64 because food damage, user safety problems, or fear of damage to the refrigerator itself may occur. Will be ordered. And. In a state in which the lifting device 80 is stopped, the user can remove the obstacle or solve the obstacle situation. [S710: Step of stopping the withdrawal and ingress motor]

When the lifting device 80 is partially elevated, the timer 91 counts the time from the point when the lifting device 80 is stopped. In addition, when the time counted by the timer elapses more than the set time, the control unit 90 causes the drawer door 30 to close. [S621: Step of judging the elapse of the set time]

In addition, when the user removes the obstacle or resolves the obstacle situation while the set time has not elapsed, the operation units 214, 301 and 302 may be operated to input the lowering operation of the lifting device 80. The control unit 90 may cause the lifting device 80 to descend by the manipulation of the manipulation units 214, 301, and 302. [S722: step of determining the input of the descent of the elevator]

The control unit instructs the operation of the lifting motor 64 when a set time elapses or a descending signal of the lifting device is input, and the lifting device 80 descends. In addition, when the lifting device 80 is lowered as shown in FIG. 20, the controller 90 stops driving the lifting motor 64. [S170: step of descending the elevator device]

On the other hand, although not shown, when the lowering of the lifting device is completed, the above-described door pull-out restraint release step may be performed so that the pull-out motor 14 is in a rotatable state.

And, in a state in which the lifting device 80 is completely lowered and the lifting motor 64 is stopped, the control unit 90 drives the drawer door 30 so that the drawer door 30 is retracted. I can. The pull-out motor 14 is operated until the state as shown in FIG. 18 is reached, and the drawer door 30 is completely closed. [S190: Drawer door retracting step]

In addition, since the drawer door 30 is in a state in which the obstacles of the withdrawal, entry and elevation of the drawer door 30 are resolved, the drawer door 30 can operate normally when a user's operation is input thereafter.

33 is a flow chart showing an operation when an obstacle is recognized during descending of the lifting device.

As shown, the user can input the operation of the drawer door 30 through at least one of the manipulation units 214, 301, and 302 for the drawer door 30 to be pulled out and inserted. At this time, the proximity sensing device 213 recognizes the user's proximity.

Therefore, only when any one of the manipulation units 214, 301, and 302 is operated in a state in which the user's proximity is recognized by the proximity sensing device 213, it is determined as a valid manipulation input and the drawer door 30 is to be pulled out. I can. [S110: Operation input step]

When a valid user's manipulation is input, the control unit 90 controls the draw-out motor 14 to start the operation of the draw-out motor 14. When the draw-out motor 14 is driven by the instruction of the control unit 90, the drawer door 30 is pulled out to the front, and is pulled out until a state as shown in Figs. 19 and 20, and then stopped. do. In this case, the withdrawal detection device 152 may detect a state in which the drawer door 30 is completely withdrawn and determine the withdrawal state of the drawer door 30. [S120: Drawer door withdrawal step]

And, although not shown, as the drawer door pull-out step is completed, the pull-out motor 14 may be constrained by a brake, and the door pull-out restriction step may be further performed as in the above-described embodiment. have.

On the other hand, when the drawer door 30 is pulled out by a set distance, the control unit 90 instructs the operation of the lifting motor 64. Then, the driving device 40 is operated by the lifting motor 64, and the lifting device 80 is raised. [S140: elevating device rising step]

The lifting device 80 is stopped when it is raised to a sufficient height to facilitate access to the food or container 36 seated on the lifting device 80 as shown in FIG. 23. In such a state, the user can easily lift the food or container 36 without excessively bowing the waist. [S150: Stopping the elevator device]

The control unit instructs the operation of the lifting motor 64 when a set time elapses or a descending signal of the lifting device is input, and the lifting device 80 descends. [S170: step of descending the elevator device]

When the lifting device 80 is unable to complete the normal descending while the lifting device 80 is descending, the controller 90 determines that the obstacle has been recognized. For example, various causes, such as when an object or a person's body is located on the path through which the lifting device 80 is elevated, food is caught between the drawer doors 30, or structural damage of the drawer door 30 As a result, it may be determined as an obstacle or an obstacle when the lifting device 80 descends.

The control unit 90 prevents the normal descent of the elevating apparatus 80 due to an obstacle when the elevating device 80 does not complete the descent within a set time, or when a load greater than the load set to the elevating motor 64 is applied. It is judged as impossible.

On the other hand, if the controller 90 determines that the failure condition is, the failure condition may be immediately output through the display 211 or the speaker 92. Therefore, it is possible to induce immediate action by the user. [S800: Determination stage of failure]

When the control unit 90 determines that an obstacle has occurred, the control unit 90 stops the operation of the lift motor 64. When the lift motor 64 is continuously operated, the control unit 90 stops the lift motor 64 because food damage, user safety problems, or fear of damage to the refrigerator itself may occur. Will be ordered. And. In a state in which the lifting device 80 is stopped, the user can remove the obstacle or solve the obstacle situation. [S810: In/out motor stop step]

In a state in which the lifting device 80 is partially lowered, the timer 91 counts the time from the point when the lifting device 80 is stopped. In addition, when the time counted by the timer elapses more than a set time, the control unit 90 causes the lifting device 80 to descend. [S821: Step of judging the elapse of the set time]

In addition, when the user removes the obstacle or solves the obstacle situation in a state in which the set time has not elapsed, the lowering operation of the lifting device 80 may be input by operating the operation units 214,301,302. The control unit 90 may cause the lifting device 80 to be closed by the manipulation of the manipulation units 214, 301, and 302. [S822: step of determining the descending input of the lifting device]

The control unit instructs the operation of the lifting motor 64 when a set time elapses or a descending signal of the lifting device is input, and the lifting device 80 descends. In addition, when the lifting device 80 is lowered as shown in FIG. 20, the controller 90 stops driving the lifting motor 64. [S170: step of descending the elevator device]

On the other hand, although not shown, when the lowering of the lifting device is completed, the above-described door pull-out restraint release step may be performed so that the pull-out motor 14 is in a rotatable state.

And, in a state in which the lifting device 80 is completely lowered and the lifting motor 64 is stopped, the control unit 90 drives the drawer door 30 so that the drawer door 30 is retracted. I can. The pull-out motor 14 is operated until the state as shown in FIG. 18 is reached, and the drawer door 30 is completely closed. [S190: Drawer door retracting step]

In addition, since the drawer door 30 is in a state in which the obstacles of the withdrawal, entry and elevation of the drawer door 30 are resolved, the drawer door 30 can operate normally when a user's operation is input thereafter.

Claims (20)

An operation input step of inputting a user's operation;
A drawer door pulling step in which the drawer door is opened while the drawer door is pulled out by driving the drawer door according to the user's manipulation input;
A lifting device lifting step of stopping the drive of the drawer door and then driving the lifting motor to start the lifting of the lifting device when detecting that the drawer door has been pulled out by the pull-out detection device for a predetermined distance;
A lifting device stopping step of stopping driving of the lifting motor when the lifting device is raised to a set height by the lifting detection device;
A step of lowering the lifting device in which the lifting motor is driven by a control unit to lower the lifting device when a set time elapses after stopping the driving of the lifting motor; And
And a drawer door retracting step of stopping the drive of the lift motor and then driving the drawer door to close while the drawer door is retracted when it senses that the lowering of the lifter is completed by the lift detection device, and
In the step of stopping the lifting device,
When the user enters the open hold operation, the set time is reset,
In the step of lowering the lifting device,
When the user inputs a descending signal of the lifting device even within the set time, the control unit lowers the lifting device.
The method of claim 1,
The set time can be input through a user's display manipulation.
delete delete The method of claim 1,
The control method of a refrigerator, characterized in that when the open holding operation is input, the set time is increased, so that the execution time of the stopping step of the lifting device is increased.
The method of claim 5,
The control method of a refrigerator, characterized in that the set time is incrementally increased according to the number of times the open holding operation is input.
The method of claim 1,
The control method of a refrigerator, wherein the set time is initialized when the open maintenance operation is input.
The method of claim 1,
When the step of drawing out the drawer door is completed,
A method of controlling a refrigerator, characterized in that the step of restricting the movement of the drawer door is further performed.
The method of claim 8,
The control method of a refrigerator, characterized in that the door pull-out restraint step is maintained until the lifting device lowering step is completed.
The method of claim 8,
In the door pull-out restraint step, the pull-out motor is braked by the control unit to restrict pulling out or pulling of the drawer door.
The method of claim 8,
The control method of a refrigerator, characterized in that the movement of the drawer door itself in a forward/rear direction is restricted in the door withdrawal and in/out restraint step.
The method of claim 8,
And performing a door pull-out restraint releasing step of releasing restraints of the drawer door when the lift detecting device detects that the hoisting device is completely lowered.
The method of claim 1,
In the step of stopping the lifting device, the control method of a refrigerator, wherein the change in the set time is output to the outside.
The method of claim 13,
The change of the set time is displayed on a screen through a display.
The method of claim 13,
The control method of a refrigerator, characterized in that the change in the set time is output by a speaker.
A cabinet having an upper storage space and a lower storage space;
A drawer door provided in a lower storage space so as to be able to be drawn in and out of the lower storage space and opening and closing the lower storage space;
An elevating device provided in the drawer door to seat food and elevating in an up-down direction;
A pull-out motor providing power for pull-out and pull-out of the drawer door;
A lifting motor connected to the lifting device and providing power for lifting the lifting device;
An operation unit for inputting a user's manipulation for the operation of the drawer door; And
And a control unit electrically connected to the operation unit, the withdrawal and inlet motor, and the lift motor,
The control unit lowers the lifting device when a set time elapses in the state in which the lifting device is completed, and lowers the lifting device when the user inputs a descending signal of the lifting device through the control unit even within the set time period. When the user inputs an open maintenance operation within the refrigerator, the set time is reset.
The method of claim 16,
The refrigerator, characterized in that it is possible to manipulate the change or initialization of the set time through the operation unit.
delete The method of claim 16,
The motor includes a brake for preventing rotation,
And the control unit restrains the drawer door from rotating by the brake when the drawer door is pulled out by a set distance.
The method of claim 19,
And the control unit releases restraint of the draw-out motor so that the draw-out motor rotates forward and backward only in a state in which the lifting device is lowered.

Images