JP2011052934A - Refrigerator - Google Patents

Abstract

An object of the present invention is to obtain a refrigerator that suppresses temperature rise in a plurality of storage rooms in different temperature zones and has improved energy saving.
A refrigeration temperature zone chamber and a refrigeration temperature zone chamber, a cooler disposed in a cooler chamber provided behind the refrigeration temperature zone chamber, and a machine room provided behind the refrigeration temperature zone chamber. A compressor disposed in the fan, a blower that blows cold air from the cooler chamber to the refrigeration temperature zone chamber and the refrigeration temperature zone chamber, a refrigeration chamber damper that controls the supply of cold air to the refrigeration temperature zone chamber, A freezer compartment damper for controlling the supply of cold air to the freezing temperature zone chamber, and a refrigerator refrigerating operation for driving the compressor and the blower with the freezer damper closed and the refrigerator compartment damper open. And a freezer compartment cooling operation for driving the compressor and the blower in a state where the freezer damper is opened and the refrigerator compartment damper is closed, and the refrigerator compartment cooling operation and the freezer compartment cooling operation are performed. Time-sharing control is performed alternately every predetermined time And wherein the door.
[Selection] Figure 8

Description

  The present invention relates to a refrigerator.

  In a vapor compression refrigerator that cools the refrigerator compartment and the freezer compartment with a single cooler, an air passage is provided for circulating the cold air cooled by the single cooler between the refrigerator compartment and the freezer compartment with a blower. Some of them are provided with a damper for opening and closing the blow of cool air only in an air passage that circulates cool air in the chamber. When the refrigerator is cooled, the damper is opened so that cool air is simultaneously sent to the refrigerator and the freezer to cool the refrigerator. When it is detected that the refrigerating room is cooled by a sensor or the like provided in the refrigerating room, the damper is closed and the operation proceeds to the freezing room cooling operation in which the cold air is blown only to the freezing room.

  However, when the temperature of the refrigerator compartment rises, such as when a lot of food is packed in the refrigerator compartment or when the refrigerator compartment door is opened and closed frequently, the refrigerator compartment does not cool easily even if it is in the refrigerator compartment cooling operation. The freezer temperature rises without shifting to the cooling operation.

  As a control when the refrigerating room becomes high in this way, a technique disclosed in Patent Document 1 is known. This is done by opening and closing the damper that blows cool air to the refrigerator compartment in a time-sharing manner, so that the refrigerator compartment cooling operation time is not so long and the temperature of the freezer compartment is suppressed. it can. In addition, by changing the time division time, the distribution of cool air to be sent to each of the refrigerator compartment and the freezer compartment can be changed, and each compartment can be efficiently cooled.

JP 2006-17371 A

  However, in patent document 1, since the air path of the freezer compartment is not separated, cold air is blown to both the refrigerator compartment and the freezer compartment when the refrigerator compartment is cooled. When the refrigerator compartment is cooled, especially when the temperature of the refrigerator compartment is high, the return cold air from the high temperature refrigerator compartment and the return cold air from the freezer compartment merge to increase the cooler temperature, and the refrigerator compartment can be cooled, but the refrigerator compartment can be cooled. The chamber had a problem that high-temperature cold air was blown into the freezer compartment and the freezer temperature was increased.

  Further, at this time, in order to suppress the temperature rise in the freezer compartment and maintain the cooler temperature at a low temperature, the compressor has to be rotated at a high speed, which causes a problem of reduced energy saving. It was.

  Then, in view of the said subject, an object of this invention is to obtain the refrigerator which improved the energy-saving property while suppressing the temperature rise of several storage chambers from which a temperature range differs.

  In order to achieve the above object, the present invention provides a cooling temperature zone chamber and a freezing temperature zone chamber defined in a heat insulating box, and a cooling unit disposed in a cooler chamber provided behind the freezing temperature zone chamber. A compressor disposed in a machine room provided behind the refrigeration temperature zone chamber, a blower that blows cool air from the cooler chamber to the refrigeration temperature zone chamber and the refrigeration temperature zone chamber, and the refrigeration A refrigeration room damper for controlling the supply of cold air to the temperature zone chamber, and a freezer compartment damper for controlling the supply of cold air to the refrigeration temperature zone chamber, wherein the freezer damper is closed and the refrigeration chamber damper is opened. A refrigerating room cooling operation for driving the compressor and the blower in the state, and a freezing room cooling operation for driving the compressor and the blower in a state where the freezer damper is opened and the refrigerating chamber damper is closed. The refrigerator compartment cooling operation and the freezer compartment cooling Wherein the split control is when alternately performing the rolling every predetermined time.

  In addition, a refrigeration room temperature sensor for detecting the temperature of the refrigeration temperature zone chamber is provided, and when the temperature detected by the refrigeration room temperature sensor reaches a predetermined temperature, the time division control is started.

  A door switch for detecting an open state of the door of the refrigerated temperature zone, and when the door opening detection number of times by the door switch reaches a predetermined number within a predetermined time, or the door opening detection time is predetermined The time-sharing control is started when the time is exceeded.

  Further, the number of revolutions of the compressor is higher during the freezer compartment cooling operation than during the refrigerator compartment cooling operation.

  In addition, before the transition from the refrigerator compartment cooling operation to the freezer compartment cooling operation, the blower is stopped and the freezer compartment damper is opened, and then the fan is driven.

  Further, a temperature controller for adjusting the temperature of each of the refrigeration temperature zone chamber and the freezing temperature zone chamber is provided, and each of the refrigerator compartment cooling operation and the freezer compartment cooling operation is based on a set value of the temperature regulator. It is characterized by setting time.

  ADVANTAGE OF THE INVENTION According to this invention, the refrigerator which suppressed the temperature rise of the several store room from which a temperature range differs, and improved energy-saving property can be obtained.

The front external view of the refrigerator which concerns on embodiment of this invention. XX sectional drawing of FIG. 1 showing the structure in the refrigerator compartment which concerns on embodiment of this invention. The front view showing the structure in the refrigerator compartment which concerns on embodiment of this invention. The flowchart showing the control at the time of the stable operation of the refrigerator which concerns on embodiment of this invention. The time chart showing the control at the time of the stable operation of the refrigerator which concerns on embodiment of this invention. The time chart showing the control at the time of the refrigerator compartment high temperature of the refrigerator which concerns on the conventional embodiment. The flowchart showing the control at the time of the refrigerator compartment high temperature of the refrigerator which concerns on embodiment of this invention. The time chart showing the control at the time of the refrigerator compartment high temperature of the refrigerator which concerns on embodiment of this invention.

  An embodiment of a refrigerator according to the present invention will be described with reference to FIGS. 1 to 8.

  FIG. 1 is a front external view of a refrigerator according to the present embodiment, FIG. 2 is a vertical sectional view taken along line XX in FIG. 1 illustrating a configuration inside the refrigerator, and FIG. 3 is a configuration inside the refrigerator. It is a front view showing, and is a diagram showing the arrangement of the cold air duct and the outlet.

  As shown in FIG. 1, the refrigerator 1 of this embodiment is comprised from the upper part from the refrigerator compartment 2, the ice-making room 3, the upper stage freezer room 4, the lower stage freezer room 5, and the vegetable compartment 6. FIG. In the following description, the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5 may be collectively referred to as the freezing chamber 60.

  The refrigerating room 2 includes front and rear refrigerating room doors 2a and 2b which are divided into left and right sides. The ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 are each a drawer-type ice making room door. 3a, an upper freezer compartment door 4a, a lower freezer compartment door 5a, and a vegetable compartment door 6a. Hereinafter, the refrigerator compartment doors 2a and 2b, the ice making compartment door 3a, the upper freezer compartment door 4a, the lower freezer compartment door 5a, and the vegetable compartment door 6a are simply referred to as doors 2a, 2b, 3a, 4a, 5a, and 6a.

  The refrigerator 1 has a door sensor (not shown) that detects the open / closed state of each door of the doors 2a, 2b, 3a, 4a, 5a, and 6a, and a state determined to be the door open state for a predetermined time, for example, 1 minute. When the operation is continued, an alarm (not shown) for notifying the user, a temperature setting unit (not shown) for setting the temperature of the refrigerator compartment 2 and the vegetable compartment 6, and the temperature setting of the freezer compartment 60 are provided.

  As shown in FIG. 2, the outside of the refrigerator 1 and the inside of the refrigerator are separated by a heat insulating box 10 formed by filling a foam heat insulating material (foamed polyurethane). The heat insulating box 10 of the refrigerator 1 has a plurality of vacuum heat insulating materials 25 mounted thereon.

  The inside of the refrigerator is separated from the refrigerator compartment 2 by the heat insulating partition wall 28, the upper freezing chamber 4 and the ice making chamber 3 (see FIG. 1, the ice making chamber 3 is not shown in FIG. 2). The lower freezer compartment 5 and the vegetable compartment 6 are separated.

  A plurality of door pockets 32 are provided on the inner side of the doors 2a and 2b (see FIG. 1). The refrigerator compartment 2 is partitioned into a plurality of storage spaces in the vertical direction by a plurality of shelves 36.

  As shown in FIG. 2, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are integrated with doors 3a, 4a, 5a, 6a provided in front of the respective compartments, and storage containers 3b, 4b, 5b. , 6b are provided, and the storage containers 4b, 5b, 6b can be pulled out by placing a hand on a handle portion (not shown) of the doors 4a, 5a, 6a and pulling it out to the front side. Similarly, the ice making chamber 3 shown in FIG. 1 is provided with an unillustrated storage container (indicated by (3b) in FIG. 2) integrally with the door 3a. The container 3b can be pulled out by pulling it out.

  As shown in FIG. 2 (see FIGS. 3 to 5 as appropriate), the cooler 7 is provided in a cooler storage chamber 8 provided substantially at the back of the lower freezing chamber 5 and is provided above the cooler 7. The air cooled (cooled air, hereinafter, low-temperature air cooled by the cooler 7) is cooled by exchanging heat with the cooler 7 by the blower (internal fan) 9 is a refrigerator air blow duct 11, The refrigeration chamber 2, the upper refrigeration chamber 4, the lower refrigeration chamber 5, and the ice making chamber 3 are sent through the upper refrigeration chamber air duct 12, the cold air duct 13, and an ice making chamber air duct (not shown). Air blowing to each room is controlled by opening and closing the refrigerator compartment damper 20 and the freezer compartment damper 50.

  Incidentally, the air ducts of the refrigerator compartment 2, the ice making chamber 3, the upper freezer compartment 4, and the lower freezer compartment 5 are provided on the back side of each compartment of the refrigerator 1 as indicated by broken lines in FIG.

  Specifically, when the refrigerator compartment damper 20 is in the open state and the freezer compartment damper 50 is in the closed state, the cold air is sent to the refrigerator compartment 2 from the outlets 2c provided in multiple stages via the refrigerator compartment air duct 11. After the cooling of the refrigerator compartment, the vegetables are introduced from the refrigerator compartment return port 2d provided in the lower right portion of the rear side of the refrigerator compartment, and are provided in the upper right portion of the rear side of the vegetable compartment 6 through the refrigerator compartment-vegetable compartment communication duct 16. The vegetable room is cooled by flowing into the vegetable room 6 from the room outlet 6c. The cold air that has cooled the vegetable compartment is returned from the vegetable compartment return port 6d provided in front of the lower part of the heat insulating partition wall 29 via the vegetable compartment return duct 18 and returned to the vegetable compartment having a width substantially equal to the width of the cooler 7. It flows in from the outlet 18a (see FIG. 3).

  Although the freezer damper 50 is omitted in FIG. 3, when the freezer damper 50 is in an open state, the cold air heat-exchanged by the cooler 7 is not shown in the drawing by an internal fan 9 and an ice making chamber air duct or upper freezer Air is blown from the outlets 3c and 4c to the ice making chamber 3 and the upper freezer compartment 4 through the air duct 12, and is blown from the outlet 5c to the upper freezer compartment 4 through the cool air duct 13. Generally, cold air having a low temperature with respect to the ambient temperature forms a downward flow from the upper side to the lower side, so that a larger amount of cold air is supplied to the upper side of the room, so that the room can be cooled well. In the refrigerator of the present embodiment, a freezer compartment cooling damper is provided, but by installing it above the internal fan, the air blow from the internal fan can be smoothly performed and the ice making unit positioned at the upper stage of the freezing temperature zone chamber. Consideration is given so that air can be blown into the chamber 3 and the upper freezing chamber 4.

  In addition, a cooler temperature sensor 35 attached to the cooler is located in the upper left portion when viewed from the front of the cooler 7, a refrigerating room temperature sensor 33 is provided in the refrigerating room 2, and a freezing room temperature sensor 34 is provided in the lower freezing room 5. The temperature of the cooler 7 (hereinafter referred to as “cooler temperature”), the temperature of the refrigerator compartment 2 (hereinafter referred to as “refrigerator compartment temperature”), and the temperature of the lower freezer compartment 5 (hereinafter referred to as “freezer compartment temperature”). ) Can be detected. Furthermore, the refrigerator 1 includes an outside temperature sensor (not shown) that detects the temperature outside the refrigerator. The vegetable room 6 is also provided with a vegetable room temperature sensor 33a.

  Incidentally, in this embodiment, isobutane is used as a refrigerant, and the amount of refrigerant enclosed is as small as about 80 g.

  On the top surface of the ceiling wall of the refrigerator 1 is arranged a control board 31 equipped with a microcomputer having a timer function, a semiconductor memory for recording temperature setting values, etc., an interface circuit, etc. (see FIG. 2). 31 is an open / closed door for each of the outside air temperature sensor, cooler temperature sensor 35, refrigerator temperature sensor 33, vegetable room temperature sensor 33a, freezer temperature sensor 34, doors 2a, 2b, 3a, 4a, 5a and 6a. Connected to the door sensor for detecting the state respectively, a temperature setter (not shown) provided on the inner wall of the refrigerator compartment 2, a temperature setter (not shown) provided on the inner wall of the lower freezer compartment 5, and the like, preinstalled in the ROM Actuators (not shown) that control the compressor 24 to be turned on and off by the program, individually drive the refrigerator compartment damper 20 and the freezer compartment damper 50 Control over data, performs ON / OFF control or rotating speed control of the internal fan 9.

  Next, with respect to the cooling operation control of the refrigerator according to the present embodiment, first, the refrigerator is turned on and a sufficient amount of time has elapsed after the food is charged and the door is opened and closed. This will be described with reference to the flowchart and the time chart of FIG.

First, in S1, the temperature detected by the freezer temperature sensor 34 is lower than the compressor OFF set temperature _TFoff , and the compressor and the blower are stopped.

Next, in S2, when the temperature detected by the freezer temperature sensor 34 is equal to or lower than the compressor ON set temperature _TFon , the process returns to S1 to continue the stopped state of the compressor and the blower. On the other hand, when the temperature detected by the freezer temperature sensor 34 becomes _{equal to} or higher than the compressor ON set temperature T _Fon , the compressor and the blower start operation in S3.

Next, in S4, if the temperature detected by the refrigerating room temperature sensor 33 is _{equal to} or higher than the refrigerating room damper 20 opening set temperature T _Ron , the refrigerating room damper 20 is opened and the freezing room damper 50 is closed in S5. The cooling room cooling operation is started. On the other hand, when the detected temperature of the refrigerating room temperature sensor 33 is lower than T _Ron in S4, or the detected temperature of the refrigerating room temperature sensor 33 is lower than the set temperature T _{Roff of the} refrigerating room damper by the refrigerating room cooling operation in S6. In this case, the refrigerator compartment cooling operation is started with the refrigerator compartment damper 20 closed and the freezer compartment damper 50 opened in S7.

Next, if the detected temperature of the freezer temperature sensor 34 becomes lower than _TFoff during the freezer cooling operation in S8, the compressor is stopped and the process returns to S1. On the other hand, if the detected temperature of the refrigerator temperature sensor 33 becomes T _Ron or higher during the freezer cooling operation in S8, the process returns to S3, the refrigerator colder damper 20 is opened, the freezer damper 50 is closed, and the refrigerator colder operation is performed again. Begin.

During the operation control in the stable state, as shown on the right side of the time chart of FIG. 5, when a large amount of food that has not been sufficiently cooled is packed, or the door of the refrigerator compartment is opened and closed frequently, the detection of the refrigerator compartment temperature sensor 33 is performed. When the temperature becomes high, the refrigerator compartment damper 20 is opened, the freezer compartment damper 50 is closed, and the refrigerator compartment cooling operation is started. However, when the temperature of the refrigerating room becomes high and the temperature detected by the refrigerating room temperature sensor 33 does not immediately reach _{TRoff, the} time during which the operation does not shift to the freezing room cooling operation becomes long, and the temperature of the freezing room increases.

  Here, the time division control when the refrigerator compartment becomes high temperature in a conventional refrigerator without a freezer damper will be described with reference to the time chart of FIG. A conventional refrigerator is provided with a damper for opening and closing the blow of cold air only in an air passage that circulates cold air in the refrigerator compartment. The freezer compartment air passage is not provided with a damper for opening and closing the cool air, and is configured to always send the cool air to the freezer if the blower is in operation (freezing in the refrigerator of this embodiment). The chamber damper 50 is always in the same state as the open state).

Time-division control is started when the refrigerator compartment is _{filled with unchilled} food and the refrigerator compartment temperature rises and the refrigerator compartment temperature sensor becomes _{equal to} or higher than the refrigerator compartment high temperature determination value T _Rhi . The refrigerator compartment damper is changed from the closed state to the opened state, and both the refrigerator compartment and the freezer compartment are simultaneously blown and cooled. After the cooling time t _RF of the refrigerating room and the freezing room, the refrigerating room damper is closed and cold air is blown only to the freezing room to cool the freezing room. After the freezing chamber cooling time t _F, again with the refrigerator compartment damper opened to cool the refrigerator compartment and the freezer compartment.

  Thus, when the temperature of the refrigerator compartment becomes high, the refrigerator compartment cooling operation and the freezer compartment cooling operation are controlled in a time-sharing manner, and the refrigerator compartment cooling operation is periodically performed.

However, when the refrigerator is cooled, if food that is not very cold is put in the refrigerator, the temperature of the refrigerator increases. In this case, the return cold air in the refrigerator compartment having a high temperature is mixed with the return cold air in the freezer compartment, and the temperature of the cooler rises. Thereby, cold air with high temperature will be blown into the freezer compartment, and the temperature rise of the freezer compartment will increase. To cool down to its elevated temperature component is may be the proportion of the freezing compartment cooling time t _F, the ratio of the cooling time of the refrigerating compartment the contrary is very small, the cooling rate of the refrigerating compartment is slow turn into. Also, in order to prevent the freezer compartment cooling time ratio from being reduced and prevent the freezer compartment temperature from rising when the refrigerator compartment is cooled, the compressor rotation speed must be set higher than that during freezer compartment cooling to maintain the cooler temperature at a low temperature. The number of revolutions must be made, and energy saving is very bad.

  Therefore, the control of this embodiment will be described using the flowchart of FIG. 7 and the time chart of FIG.

When a large amount of uncooled food is packed into the refrigerator compartment from the stable operation (normal operation), the refrigerator compartment temperature rises. In S11, when the temperature detected by the refrigerating room temperature sensor 33 is equal to or higher than the refrigerating room high temperature determination value T _Rhi (for example, about + 8 ° C.), when the refrigerating room door open / close switch detects the open state a predetermined number of times within a predetermined time, Alternatively, this control is started when an open state for a predetermined time or longer is detected.

First, in S12, the refrigerator compartment damper 20 is opened, the freezer compartment damper 50 is closed, and the refrigerator compartment cooling operation is started. And in S13, when the temperature of the refrigerator compartment temperature sensor 33 falls below _TRoff , this control is complete _| finished and it returns to the stable driving _| operation (normal driving _| operation).

Further, if the detected temperature of the refrigerating compartment temperature sensor 33 is higher than T _Roff, after the microcomputer of the timer on the substrate has passed the refrigerating compartment cooling time t _R time, sensed temperature of the refrigerating compartment temperature sensor 33 reaches below T _Roff Even if it is not, it shifts to the freezer compartment cooling operation. At this time, at the time of switching from the refrigerator compartment cooling operation to the freezer compartment operation, the cooler temperature is high in the refrigerator cooling operation, and the temperature of the cooler is maintained even if the compressor speed during the freezer compartment cooling is high. Gets cold after a delay. For this reason, if the blower 9 is operated while the cooler temperature is high and cold air having a high temperature is sent to the freezer compartment, the temperature of the freezer compartment will rise.

  Therefore, at the time of switching from the refrigerator compartment cooling operation to the freezer compartment cooling operation, that is, in S15, the blower 9 is stopped for a certain period of time, for example, about 90 seconds, or until the temperature of the cooler becomes lower than the predetermined temperature. After the temperature of 7 becomes sufficiently low, the blower 9 is operated in S16 to blow cool air into the freezer compartment. Thereby, the temperature rise of a freezer compartment can be suppressed.

In S16, the timer is reset, the refrigerator compartment damper 20 is closed, the freezer compartment damper 50 is opened, the blower 9 is operated, and the system is shifted to the freezer compartment cooling operation. Next, in S17, when the freezer temperature sensor 34 decreases to _TFoff , the present control is terminated and the operation returns to the stable operation (normal operation).

Further, when the temperature of the freezing compartment temperature sensor 34 is higher than T _Foff, after the timer has elapsed freezing compartment cooling time t _F time in S18, the timer is reset back to S12, the refrigerating compartment damper 20 open, the freezing compartment damper 50 is closed and the refrigerating room cooling operation is started again.

  Thus, the refrigerator compartment cooling operation and the freezer compartment cooling operation are alternately performed in a time division manner. The rotation speed of the compressor during time-sharing control is such that the temperature of the cooler can be maintained at a lower temperature in order to cool the freezer room to about −18 ° C. when the freezer is cooled. . On the other hand, the refrigerator temperature should just be kept at about 3 degreeC. Therefore, in the refrigerator of the present embodiment, since the cold air blown into the refrigerator compartment is separated from the freezer compartment, the cooler temperature during the refrigerator compartment cooling operation is a temperature sufficiently higher than the cooler temperature during the freezer compartment cooling, for example, The rotation speed may be about −10 ° C. to −15 ° C.

  Therefore, even when the refrigerating room is hot, the cooler temperature at the time of cooling the refrigerating room can be made higher than that at the time of cooling the refrigerating room, and the rotational speed of the compressor can be made lower than that at the time of freezing room cooling operation. . In this embodiment, the rotational speed is slightly higher than the compressor rotational speed during stable operation.

The time division times t _R and t _F can be changed according to the set value of the temperature controller. For example, when the temperature controller is strong setting of the freezing compartment, it is possible to increase the cold air quantity blown to the freezing chamber by increasing the t _F.

  With the above control, even when the refrigerator compartment becomes hot, the refrigerator compartment cooling operation and the freezer compartment cooling operation are separated and alternately cooled in a time division manner, so that the refrigerator compartment can be cooled without increasing its temperature. The chamber can be cooled from a hot state. Moreover, energy saving property can be improved by making the rotation speed of the compressor low.

  As described above, the refrigeration temperature zone chamber and the refrigeration temperature zone chamber defined in the heat insulation box, the cooler disposed in the cooler chamber provided behind the refrigeration temperature zone chamber, and the refrigeration temperature zone A compressor disposed in a machine room provided at the rear of the chamber, a blower for blowing cool air from the cooler chamber to the refrigeration temperature zone chamber and the refrigeration temperature zone chamber, and cooling air to the refrigeration temperature zone chamber A refrigerating room damper for controlling supply, and a freezing room damper for controlling supply of cold air to the freezing temperature zone chamber, wherein the compressor and the refrigerating room damper are closed and the refrigerating room damper is opened. A refrigerating room cooling operation for driving the blower, and a refrigerating room cooling operation for driving the compressor and the blower with the freezer damper opened and the refrigerating room damper opened. The operation and the freezer cooling operation are exchanged at predetermined intervals. Is the time-sharing control performed.

  Thereby, the refrigerator compartment air passage and the freezer compartment air passage can be separated, and cool air having a temperature suitable for cooling each of the refrigerator compartment and the refrigerator compartment can be blown.

  In addition, by cooling each temperature zone chamber in a time-sharing manner, it is possible to increase the circulation amount of cold air to the freezing temperature zone chamber. Therefore, even during the cooling of the refrigerated temperature zone chamber, the temperature rise of the freezing temperature zone chamber can be suppressed. Furthermore, when the refrigeration temperature zone chamber is cooled, energy saving is good without increasing the rotational speed of the compressor.

  Next, a refrigerating room temperature sensor for detecting the temperature of the refrigerating temperature zone chamber is provided, and when the temperature detected by the refrigerating room sensor reaches a predetermined temperature, the time division control is started. Thereby, when the refrigeration temperature zone chamber becomes high temperature, the time-sharing control is started, and efficient cooling can be performed.

  Next, a door switch for detecting the open state of the door of the refrigerated temperature zone is provided, and when the number of times of opening and closing the door reaches a predetermined number within a predetermined time, or the opening time of the chamber door exceeds a predetermined time In this case, the time division control is started. Thereby, the temperature rise of the refrigeration temperature zone chamber is predicted, and the time division control is started, so that efficient cooling can be performed.

  Next, the rotational speed of the compressor is set higher during the freezer compartment cooling operation than during the refrigerator compartment cooling operation. Thereby, the rotation speed of a compressor can be made into a low rotation speed at the time of cooling operation of a refrigeration temperature zone room rather than at the time of cooling operation of a freezing temperature zone room, and energy saving property can be made high.

  Next, before shifting from the refrigerator compartment cooling operation to the freezer compartment cooling operation, the blower is stopped and the freezer compartment damper is opened, and then the fan is driven. Thereby, the temperature rise of the freezing temperature zone chamber when shifting from the cooling operation of the refrigerating temperature zone chamber to the cooling operation of the freezing temperature zone chamber can be suppressed.

  Next, a temperature controller for adjusting the temperature of each of the refrigeration temperature zone chamber and the freezing temperature zone chamber is provided, and each of the refrigerator compartment cooling operation and the freezer compartment cooling operation is performed based on a set value of the temperature regulator. Set the time. Thereby, the ratio of the cool air which blows to each temperature zone room can be changed, and each temperature zone room can be cooled efficiently.

1 Refrigerator 2 Refrigerated room (refrigerated temperature zone)
3 Ice making room (freezing temperature zone)
4 Upper freezer room (freezing temperature room)
5 Lower freezer compartment (freezing temperature zone)
6 Vegetable room (refrigerated temperature room)
7 Cooler 8 Cooler storage room 9 Blower (Blower in the cabinet)
DESCRIPTION OF SYMBOLS 10 Heat insulation box 11 Refrigerating room air duct 12 Upper freezer room air duct 13 Cold air duct 15 Refrigerating room duct 16 Refrigerating room-vegetable room communication duct 17 Freezing room return port 18 Vegetable room return duct 18a Vegetable room return discharge port 19 Machine room 20 Cold room damper 21 Evaporating dish 22 Defrost heater 23 ヒ ー タ 24 Compressor 31 Control board 33 Cold room temperature sensor 33a Vegetable room temperature sensor 34 Freezer room temperature sensor 35 Cooler temperature sensor 50 Freezer room damper 53 Upper cover 54 Partition plate 60 Freezing Room

Claims (6)

A refrigerated temperature zone chamber and a freezing temperature zone compartment defined in a heat insulation box,
A cooler disposed in a cooler chamber provided behind the freezing temperature zone chamber;
A compressor disposed in a machine room provided behind the refrigerated temperature zone;
A blower for blowing cold air from the cooler room to the refrigeration temperature zone room and the refrigeration temperature zone room;
A refrigerating room damper for controlling the supply of cold air to the refrigerating temperature zone;
A freezer compartment damper that controls the supply of cold air to the freezer temperature zone chamber,
A refrigerating room cooling operation for driving the compressor and the blower in a state where the freezer damper is closed and the refrigerating room damper is opened;
A freezer compartment cooling operation for driving the compressor and the blower with the freezer compartment damper open and the refrigerator compartment damper closed;
A refrigerator in which time-division control is performed in which the refrigerator compartment cooling operation and the freezer compartment cooling operation are alternately performed at predetermined time intervals.   2. The refrigerator according to claim 1, further comprising a refrigerator temperature sensor that detects a temperature of the refrigerator compartment, and the time-division control is started when a temperature detected by the refrigerator temperature sensor reaches a predetermined temperature. The refrigerator described.   A door switch that detects an open state of the door of the refrigerated temperature zone, and when the door opening detection count by the door switch reaches a predetermined number of times within a predetermined time, or the door opening detection time is a predetermined time 2. The refrigerator according to claim 1, wherein the time-sharing control is started when the number exceeds.   The refrigerator according to any one of claims 1 to 3, wherein the rotation speed of the compressor is higher during the freezer compartment cooling operation than during the refrigerator compartment cooling operation.   Before moving from the said refrigerator compartment cooling operation to the said freezer compartment cooling operation, after stopping the said air blower and making the said freezer compartment damper into an open state, the said air blower is driven, It is characterized by the above-mentioned. The refrigerator in any one.   A temperature controller for adjusting the temperature of each of the refrigeration temperature zone chamber and the freezing temperature zone chamber is provided, and the respective times of the refrigerator compartment cooling operation and the freezer compartment cooling operation are determined based on the set values of the temperature regulator. The refrigerator according to any one of claims 1 to 3, wherein the refrigerator is set.

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