WO2018086503A1 - Refrigerator shelf lifting synchronization system - Google Patents

Abstract

A refrigerator shelf lifting synchronization system (10) is provided, comprising: a controller, a shelf body (11), and at least two lifting mechanisms (12). The lifting mechanism (12) comprises: a motor (121); a drive screw (122); a guide rod (123), provided with a top position-limiting device (126) and a bottom position-limiting device (127); and a connecting member (124), provided with a sliding nut (125), wherein the sliding nut (125) moves up and down to drive the connecting member (124) and the shelf body (11) to move along the guide rod (123). When the connecting member (124) touches the top position-limiting device (126) or the bottom position-limiting device (127), the top position-limiting device (126) or the bottom position-limiting device (127) feeds back a position signal of the connecting member (124) to the controller. The controller is configured to control, according to the position signal fed back by the top position-limiting device (126) or the bottom position-limiting device (127), the motor to stop running.

Description

Refrigerator rack lifting and synchronization system

The present application claims the priority of the Chinese Patent Application No. 201610990482.9, the entire disclosure of which is hereby incorporated by reference in its entirety in its entirety in .

Technical field

The invention belongs to the technical field of household appliances, and in particular relates to a lifting synchronization system of a refrigerator shelf.

Background technique

At present, at least one rack for holding articles is usually provided in a refrigerating compartment of a refrigerator, and a rib for supporting the rack is disposed on a wall of the refrigerator compartment of the refrigerator, and the rack is placed on the rib Upper, thereby dividing the refrigeration compartment into a plurality of storage spaces.

With the development of technology, the electric lifting rack is installed in the refrigerator, and its main function is to meet the storage of different volumes of food, and the height between the racks can be electrically adjusted within an effective range, without disassembling the rack and improving the user. Experience. However, during the use of the electric lifting rack, the following problems occur: when the rack rises to the highest point or drops to the lowest point, the rack is restricted by the lifting stroke, and the motor is forced to block, the motor There are noise and heat problems when stalling.

Summary of the invention

It is an object of the present invention to provide a lifting synchronization system for a refrigerator rack that effectively solves the above problems.

In order to achieve the above object, the present invention provides a lifting synchronization system for a refrigerator rack,

The utility model comprises: a controller, a rack body and at least two lifting mechanisms, the lifting mechanism comprising:

a motor, wherein the motor is provided with a sensor, and the motor and the sensor are electrically connected to the controller;

a drive screw coupled to the motor and driven by the motor;

a guiding rod is disposed in parallel with the driving screw, and the guiding rod is provided with a top limiting device and a bottom limiting device electrically connected to the controller;

a connecting member fixed to the rack body, wherein the connecting member is provided with a sliding nut adapted to the driving screw, and when the rack body and the lifting mechanism are assembled, the connecting member Slidingly sleeved on the guiding rod, the sliding nut is sleeved on the driving screw, and the motor drives the driving screw to rotate to drive the sliding nut to lift and lower to drive the connecting member and the shelf body along The guide rod moves;

When the connecting member touches the top limiting device or the bottom limiting device during the moving process, the top limiting device or the bottom limiting device feeds back a position signal of the connecting member to the controller, The controller is set to be based on The position signal fed back by the top limiting device or the bottom limiting device controls the motor to stop running.

As a further improvement of the present invention, the motor is provided with a rotor, and the controller is further configured to control the rotation speed and the number of steps of each motor according to the rotation speed and the step number signal of the corresponding motor fed back by each of the sensors. For synchronization.

As a further improvement of the present invention, a rotor is provided in the motor, and the rotor is coupled to the drive screw.

As a further improvement of the present invention, the rotor is provided with a magnetic gear that operates in synchronization with the rotor, and the sensor converts the sensed gear rotational speed into an electrical signal for feedback to the controller.

As a further improvement of the present invention, the magnetic gear includes a magnetic tooth boss and a non-magnetic groove.

As a further improvement of the present invention, the opposite sides of the rack body are provided with a support member, and the rack body is fixedly connected to the connecting member through the support member.

As a further improvement of the present invention, the two lifting mechanisms are disposed on both sides of the rear wall of the refrigerator liner.

As a further improvement of the invention, the sensor is a Hall sensor.

As a further improvement of the present invention, the controller is integrated with a storage unit, and the controller stores the number of motor running steps sensed by the sensor to the storage when the rack is lifted to any position and the power is turned off. unit.

As a further improvement of the present invention, the storage unit is an EPROM or an EEPROM.

The invention has the beneficial effects that: a limiting device is arranged at a limit position of the lifting and lowering stroke of the rack, the limiting device can determine the position state of the shelf, and feed back the position state signal to the controller for logic analysis, thereby controlling the motor Stop running to prevent the motor block from forwarding heat and noise.

DRAWINGS

1 is a schematic structural view of a lifting synchronization system of a refrigerator shelf according to an embodiment of the present invention;

2 is a schematic structural view of a lifting synchronization system of a refrigerator shelf according to another embodiment of the present invention;

FIG. 3 is a schematic diagram showing the interaction principle of a rotor, a magnetic gear and a sensor according to an embodiment of the present invention.

detailed description

The present invention will be described in detail below in conjunction with the embodiments shown in the drawings. However, the embodiments are not intended to limit the invention, and the structural, method, or functional changes made by those skilled in the art in accordance with the embodiments are included in the scope of the present invention.

The terms "upper", "upper", "lower", "lower", and the like, as used herein, are used to describe the relative position of the space for the purpose of illustration and description. The relationship of a unit or feature. Terms of spatial relative position may be intended to include different orientations of the device in use or operation other than the orientation shown in the figures. For example, elements that are described as "below" or "beneath" other elements or features are "above" other elements or features. Thus, the exemplary term "lower" can encompass both the above and the Assume The device can be oriented (rotated 90 degrees or other orientations) in other ways and the spatially related descriptors used herein interpreted accordingly.

Referring to Figure 1, a preferred embodiment of the lifting synchronization system 10 of the refrigerator rack of the present invention is shown. The lifting synchronization system 10 of the refrigerator rack comprises a controller (not shown), a rack body 11 and a lifting mechanism 12, wherein the lifting mechanism 12 further comprises: a motor, a driving screw connected to the motor and driven by the motor, The guide rod, the rack body 11 is slidably disposed on the guide rod by a connecting member, and a rotor and a sensor for sensing the motion state of the rotor are provided in the motor.

In the present embodiment, the rack body 11 belongs to an ultra-wide rack, and at least two lifting mechanisms 12 are required to provide sufficient power to complete the lifting movement of the rack body 11 to provide a more flexible space for storing food materials. The lifting mechanisms 12 are respectively disposed on both sides of the rear wall of the refrigerator inner casing (not shown).

Specifically, one of the lifting mechanisms 12 includes: a first motor, a first driving screw, a first guiding rod and a first connecting member adapted to the first guiding rod, the first guiding rod is disposed adjacent to the first driving screw and two Parallel, one end of the first guiding rod and the first driving screw are fixed on the top wall of the inner chamber of the refrigerator compartment, and the other end of the first transmission screw is fixedly connected with the rotor of the first motor, the first transmission screw and the first The rotor of a motor rotates synchronously, and the other end of the first guide rod is fixed to the outer casing of the first motor. The other lifting mechanism 12 includes a second motor, a second driving screw, a second guiding rod and a second connecting member adapted to the second guiding rod. The second guiding rod and the second driving screw are disposed adjacent to each other and are parallel to each other. One end of the second guiding rod and the second driving screw are fixed on the top wall of the indoor chamber of the refrigerator, and the other end of the second driving screw is fixedly connected with the rotor of the second motor, and the rotor of the second driving screw and the second motor Simultaneously rotating, the other end of the second guide rod is fixed to the outer casing of the second motor.

Further, the opposite sides of the rack body 11 are provided with a support member 111, and the rack body 11 is fixedly connected to the connecting member through the support member 111.

Providing a first sliding nut adapted to the first transmission screw on the first connecting member, and a second sliding nut adapted to the second driving screw on the second connecting member, when the rack body 11 is lifted and lowered After the assembly of the mechanism 12 is completed, the first connecting member is slidably sleeved on the first guiding rod, the first sliding nut is sleeved on the first driving screw, and the second connecting member is slidably sleeved on the second guiding rod, The two sliding nuts are sleeved on the second transmission screw. The drive screw is driven by the motor such that the slide nut moves along the drive screw to move along the guide rod body 11 along the guide rod.

Since the two lifting mechanisms 12 are symmetrically assembled with the rack body 11, the structures of the two lifting mechanisms 12 are identical. The following is an example of one of the lifting mechanisms 12:

As shown in FIGS. 2 and 3, the first motor 121 is activated, and the rotor 1211 therein drives the first transmission screw 122 to rotate, so that the sliding nut 125 moves up and down along the transmission screw, and the first connecting member 124 moves along the guiding rod to drive and rest. The frame body 11 moves along the guide bar 123.

Further, a first sensor 1212 is disposed in the first motor 121, and the first motor 121 and the first sensor 1212 are electrically connected to a controller (not shown). Preferably, the first sensor 1212 is a Hall sensor. The rotor 1211 of the first motor 121 is provided with a magnetic gear 13 which is synchronously operated with the rotor. The first sensor 1212 can detect different states of the magnetic tooth boss and the non-magnetic groove on the gear by the principle of electromagnetic induction. Thereby, the rotational speed of the magnetic gear 13 is obtained, and the sensed gear rotational speed is converted into an electrical signal fed back to the controller.

Since the lifting and lowering of the rack requires at least two lifting mechanisms 12, in the embodiment, the controller receives the rotation speed and the step number signals of the corresponding motor fed back by the first sensor and the second sensor, and the controller analyzes the first motor and When the speed signal of the second motor has a difference value, the logic operation is performed, and the signal of the motor running is compensated, so that the motor with slow speed is relatively accelerated, the motor with fast speed is relatively decelerated, and the controller continuously detects the speed and The drive signal is compensated, and the speed and the number of steps of each motor are controlled to gradually synchronize.

Accordingly, the present invention also provides a control method for a lifting synchronization system using the above-described refrigerator rack, which comprises the following steps:

S1: The sensor collects the speed and the step number signal of each motor and feeds back to the controller, and the controller receives the speed and the step number signal of the corresponding motor fed back by the first sensor and the second sensor.

S2. When the controller analyzes the difference between the speed of the different motors and the number of steps, the controller sends a control signal to each motor to adjust the speed and the number of steps of each motor until the motors run synchronously. When the controller analyzes that the speed signals of the first motor and the second motor have different values, perform a logic operation and compensate by driving the signal of the motor running, so that the motor with slow speed is relatively accelerated, and the motor with fast speed is relatively decelerated. The controller continuously detects the speed and drive signal compensation, and controls the speed and the number of steps of each motor to gradually synchronize.

When the weight load is placed on the rack near the side of the first motor, the first motor is subjected to greater resistance than the second motor, and the first motor operates at a slower speed than the second motor, the first sensor and the second The real-time sensor collects the speed signals of the first motor and the second motor and transmits them to the controller. The controller analyzes that the speed signals of the first motor and the second motor have different values, performs logic operations, and compensates by driving signals of the motor. The first motor is relatively accelerated, the second motor is relatively decelerated, and the rotational speed and the drive signal compensation are continuously detected, so that the two motors can be operated synchronously.

When the weight load is placed on the shelf near the side of the second motor, the reverse control logic is the same as above.

Further, the guiding rod is further provided with a top limiting device 126 and a bottom limiting device 127 electrically connected to the controller. When the connecting member touches the top limiting device 126 or the bottom limiting device 127, the top limit is The device 126 or the bottom stop device 127 feeds back the position signal of the connector to the controller, and the controller is arranged to control the motor to stop operating according to the position signal fed back by the top limit device 126 or the bottom limit device 127.

Preferably, the top limiting device 126 and the bottom limiting device 127 are both contact switches.

When the first motor 121 and the second motor (not labeled) have an unsynchronized deviation during operation, the first connecting member 124 or the second connecting member (not numbered) will sequentially reach the highest point of the rising stroke or the lowest of the descending stroke. At this point, the first arriving connector will touch the top limiting device 126 or the bottom limiting device 127, and the top limiting device 126 or the bottom limiting device 127 will feed back the position signal of the connector to the controller (high/low The level signal), the controller controls the corresponding motor to stop according to the position signal fed back by the top limiting device 126 or the bottom limiting device 127, and the motor corresponding to the connected connector continues to run until the connected connector touches After the top limiting device 126 or the bottom limiting device 127 stops running, the motor block is prevented from forwarding heat and generating noise, and the problem of motor running deviation is effectively reset.

In addition, a memory unit is integrated on the controller, and when the rack is lifted to any position and the power is turned off, the controller stores the number of motor running steps sensed by the sensor to the storage unit. The number of motor running steps detected by the sensor is transmitted to the storage unit on the controller to memorize the position information of the motor at the time of power-off, which effectively solves the problem that when the rack is lifted to the highest minimum travel limit point after power-on again, The problem that the motor may be blocked by the limit.

Preferably, the storage unit is an EPROM or an EEPROM.

The lifting synchronization system of the refrigerator rack of the present invention and the control method thereof preferably solve the following three problems:

1. When a motor failure does not turn, the sensor detects the motor speed stop signal, immediately feeds back to the controller, and controls another motor to stop running, effectively solving the problem that the non-faulty motor continues to run and block the heat transfer;

2. When the weight on the rack is unbalanced and the left and right motors are unevenly loaded, the sensor collects the speed and running steps of the two motors from time to time and feeds back to the controller. The controller coordinates the two motors at the same time. Operation, effectively solving the problem of tilting the rack;

3. When the rack is lifted to any position and the power is turned off, the number of motor running steps detected by the Hall sensor is transmitted to the storage unit on the controller, and the position information of the motor at the moment of power failure is effectively solved. After the power is turned on again, when the rack is lifted to the highest and minimum travel limit points, the motor may stop blocking and jam.

It is apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the invention is defined by the appended claims instead All changes in the meaning and scope of equivalent elements are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim.

In addition, it should be understood that although the description is described in terms of embodiments, not every embodiment includes only one independent technical solution. The description of the specification is merely for the sake of clarity, and those skilled in the art should regard the specification as a whole. The technical solutions in the respective embodiments may also be combined as appropriate to form other embodiments that can be understood by those skilled in the art.

Claims (10)

A lifting synchronization system for a refrigerator shelf, comprising: a controller, a shelf body and at least two lifting mechanisms, wherein the lifting mechanism comprises: a motor, wherein the motor is provided with a sensor, and the motor and the sensor are electrically connected to the controller; a drive screw coupled to the motor and driven by the motor; a guiding rod is disposed in parallel with the driving screw, and the guiding rod is provided with a top limiting device and a bottom limiting device electrically connected to the controller; a connecting member fixed to the rack body, wherein the connecting member is provided with a sliding nut adapted to the driving screw, and when the rack body and the lifting mechanism are assembled, the connecting member Slidingly sleeved on the guiding rod, the sliding nut is sleeved on the driving screw, and the motor drives the driving screw to rotate to drive the sliding nut to lift and lower to drive the connecting member and the shelf body along The guide rod moves; When the connecting member touches the top limiting device or the bottom limiting device during the moving process, the top limiting device or the bottom limiting device feeds back a position signal of the connecting member to the controller, The controller is configured to control the motor to stop operating based on a position signal fed back by the top limit device or the bottom limit device. The lifting synchronization system of the refrigerator rack according to claim 1, wherein the controller is further configured to control the rotation speed of each motor according to the rotation speed and the step number signal of the corresponding motor fed back by each of the sensors The number of steps and the number of steps gradually become synchronized. The lifting synchronization system for a refrigerator rack according to claim 2, wherein a rotor is disposed in the motor, and the rotor is coupled to the transmission screw. A lifting synchronization system for a refrigerator rack according to claim 3, wherein said rotor is provided with a magnetic gear, said magnetic gear is synchronized with said rotor, said sensor will sense the gear speed The conversion to an electrical signal is fed back to the controller. A lifting synchronization system for a refrigerator rack according to claim 4, wherein said magnetic gear comprises a magnetic tooth boss and a non-magnetic groove. The lifting synchronization system of the refrigerator rack according to claim 1, wherein the opposite sides of the rack body are provided with a support member, and the rack body is connected to the rack through the support member. Piece fixed connection. The lifting synchronization system for a refrigerator shelf according to claim 1, wherein the two lifting mechanisms are disposed on both sides of a rear wall of the refrigerator liner. A lifting synchronization system for a refrigerator rack according to claim 2, wherein said sensor is a Hall sensor. The lifting synchronous control method for a refrigerator rack according to claim 1, wherein the controller is integrated with a storage unit, and when the rack is lifted to any position, the controller is turned off. The number of motor running steps sensed by the sensor is stored to the storage unit. A lifting synchronization system for a refrigerator rack according to claim 1, wherein said storage unit is an EPROM or an EEPROM.

Images