JP2014152990A - Refrigerator-freezer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a refrigerator-freezer which reduces power consumption.SOLUTION: A refrigerator-freezer includes control means 50 which controls an airflow regulator 26 for a cold room so that a flow rate of cool air supplied to the cold room 1 is minimized when a temperature detected by a cold room thermistor 22 reaches a lower limit temperature and the flow rate of the cool air is increased so as to be higher than the minimum airflow rate when the temperature detected by the cold room thermistor 22 reaches an upper limit temperature. The control means 50 regulates the cool air flow rate which is set when the cool air flow rate is increased so as to be higher than the minimum air flow rate on the basis of a load in the cold room 1.

Description

  The present invention relates to a refrigerator-freezer.

  As a conventional refrigerator-freezer, in order to keep the temperature in the refrigerator compartment within a predetermined range, the upper limit temperature and the lower limit temperature of the freezer compartment and the refrigerator compartment are set according to the outside air temperature, and the temperature of the refrigerator compartment has reached the upper limit temperature. Sometimes the refrigeration room air volume regulator is opened, and when the refrigeration room temperature reaches the lower limit temperature, the refrigeration room air volume regulator is closed to cool the refrigeration room and refrigerate according to the outside air temperature. Some have changed the opening degree of the air volume regulator in the room (for example, Patent Document 1).

JP 2009-115337 A ([0040], FIG. 17)

  The refrigerator-freezer described in Patent Document 1 controls the opening degree of the air volume regulator in the refrigerator compartment according to the outside air temperature, but the opening degree of the air volume regulator in the refrigerator compartment is controlled according to the load of food in the refrigerator compartment. It was not something to control.

  Therefore, for example, when the refrigeration room is heavily loaded and the air volume regulator in the refrigeration room has a small opening (when the amount of air supplied to the refrigeration room is small), the refrigeration room is difficult to cool. The temperature of the room is unlikely to decrease, and the time until the temperature detection means of the refrigerator compartment detects the lower limit temperature set according to the outside air temperature is extended.

  In addition, when the air volume supplied to the refrigerator compartment decreases, the air volume supplied to the freezer compartment increases, but the refrigerator air volume regulator adjusts until the lower limit temperature of the refrigerator compartment set according to the outside air temperature is detected. Due to the open state, the time until the temperature detecting means of the freezer detects the lower limit temperature is also extended.

  Here, since the compressor stops when it reaches the lower limit temperature of the freezer compartment set according to the outside air temperature, when the time until the temperature detection means of the freezer compartment detects the lower limit temperature of the freezer compartment, The operating time of the compressor is also extended. For this reason, it has been desired to shorten the operation time of the compressor and suppress the deterioration of the power consumption.

  The present invention has been made against the background described above, and an object thereof is to obtain a refrigerator-freezer that reduces power consumption.

  A refrigerator-freezer according to the present invention includes a refrigerator compartment, a freezer compartment, a compressor that is operation-controlled based on the temperature in the freezer compartment, and a cooler that generates cold air using a refrigerant supplied from the compressor. A fan that guides the cool air generated by the cooler to the inside of the refrigerator compartment and the inside of the freezer compartment, a branch air passage formed on the downstream side of the fan, the branch air passage, and the refrigerator compartment Refrigeration room air passages that communicate with each other, a freezer compartment air passage that communicates between the branch air passage and the freezer compartment, and a freezer compartment air passage that is supplied to the refrigerating compartment from the refrigerating compartment air passage A refrigeration room air volume adjuster that continuously or stepwise adjusts the amount of cold air between a minimum air volume and a maximum air volume, temperature detection means for detecting the temperature inside the refrigeration room, and the temperature detection When the temperature detected by the means reaches the lower limit temperature, it is supplied to the refrigerator compartment. Controlling the air volume regulator for the refrigerator compartment so that the amount of cool air to be reached becomes the minimum air volume, and when the temperature detected by the temperature detecting means reaches the upper limit temperature, the amount of cool air is increased more than the minimum air volume. Control means for controlling the refrigeration room air volume adjuster, and the control means controls the amount of cold air when the amount of cold air is increased from the minimum air volume based on the load in the refrigeration room. is there.

  According to the present invention, the amount of cold air when supplying cold air to the refrigerator compartment is controlled based on the load in the refrigerator compartment. For this reason, for example, when the load in the refrigerator compartment is low, it is possible to suppress unnecessarily cold air being supplied to the refrigerator compartment, and the amount of cold air supplied to the freezer compartment can be relatively increased. Therefore, the operation time of the compressor is shortened, and the amount of power consumption accompanying the operation of the compressor can be reduced.

It is a front view of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is the longitudinal cross-sectional view which looked at the refrigerator-freezer which concerns on Embodiment 1 of this invention from the side surface. It is a front view in the state where the door of the refrigerator-freezer according to Embodiment 1 of the present invention was removed. It is a figure which shows the structure of the air volume regulator for refrigerator compartment which concerns on Embodiment 1 of this invention. It is a time chart which shows the temperature change of the refrigerator compartment, the operation | movement of the air volume regulator for refrigerator compartments, the temperature change of a freezer compartment, and the operation | movement of a compressor when the refrigerator compartment of the refrigerator-freezer concerning a comparative example is low load. It is a time chart which shows the temperature change of the refrigerator compartment when the refrigerator compartment of the refrigerator-freezer which concerns on Embodiment 1 of this invention is low load, operation | movement of the air volume regulator for refrigerator compartments, temperature change of a freezer compartment, and operation | movement of a compressor. is there. It is a graph which shows the temperature change of the refrigerator compartment thermistor when the refrigerator compartment of the refrigerator-freezer which concerns on Embodiment 1 of this invention is at the time of high load and low load. It is a table | surface which shows an example of the temperature fall amount of the refrigerator compartment thermistor according to the load in the refrigerator compartment of the refrigerator-freezer which concerns on Embodiment 1 of this invention. It is a graph which shows an example of the relationship between the opening degree of the refrigerator air volume regulator of the refrigerator-freezer which concerns on Embodiment 1 of this invention, and the air volume supplied to a refrigerator compartment. It is a graph which shows the refrigerator compartment temperature for every open time of the refrigerator compartment of the refrigerator-freezer which concerns on Embodiment 2 of this invention. It is a table | surface which shows the investigation result about the water temperature of the plastic bottle in the pocket of the refrigerator compartment door of the refrigerator-freezer which concerns on Embodiment 2 of this invention.

Embodiment 1 FIG.
FIG. 1 is a front view of a refrigerator-freezer 100 according to Embodiment 1 of the present invention.
FIG. 2 is a longitudinal sectional view of the refrigerator-freezer 100 according to Embodiment 1 of the present invention as seen from the side.
As shown in FIGS. 1 and 2, the refrigerator-freezer 100 includes a refrigerator-freezer body 100A having a substantially rectangular parallelepiped shape. The inside of the refrigerator-freezer main body 100A is partitioned by the partition plate 7, and, for example, the refrigerator compartment 1, the ice making compartment 2, the switching compartment 3, the freezer compartment 4, and the vegetable compartment 5 are formed. Hereinafter, these rooms may be collectively referred to simply as storage rooms.

  The front of each storage chamber is opened, and the opening is provided with a door that closes the opening so as to be opened and closed. Specifically, the refrigerator compartment left door 1 a and the refrigerator compartment right door 1 b are attached to the front opening of the refrigerator compartment 1, the ice making compartment door 2 a is attached to the front opening of the ice making compartment 2, and the switching compartment 3 has a front opening. A switching chamber door 3 a is attached, a freezer compartment door 4 a is attached to the front opening of the freezer compartment 4, and a vegetable compartment door 5 a is attached to the front opening of the vegetable compartment 5. For example, a handle (not shown) is attached to the front surface of the door.

  The refrigerating room 1 is a storage room provided at the uppermost stage in the refrigerator 100 and is a storage room in which the inside is maintained in a refrigerating temperature zone and is higher than the temperature zone of the freezing room 4. The ice making room 2 and the switching room 3 are storage rooms provided side by side below the refrigerating room 1, and are storage rooms in which the inside is maintained in a freezing temperature zone. The switching chamber 3 can be switched between a freezing temperature and a soft freezing temperature. The freezing room 4 is a storage room provided below the ice making room 2 and the switching room 3, and the inside is maintained in a freezing temperature zone and is lower than the temperature zone of the refrigerating room 1. The vegetable room 5 is a storage room provided below the freezing room 4. The vegetable room 5 is a storage room in which the inside is maintained in a refrigerated temperature zone as in the refrigerated room 1, but the temperature is higher than that in the refrigerated room 1. The positions of the ice making chamber 2 and the switching chamber 3 may be reversed.

  An operation panel 12 for adjusting the set temperatures of the refrigerator compartment 1, the switching compartment 3, the freezer compartment 4, and the vegetable compartment 5 is attached to the refrigerator door left door 1a. In addition, the arrangement | positioning location of the operation panel 12 is not limited to the refrigerator compartment left door 1a, For example, you may arrange | position in the refrigerator compartment.

  As shown in FIGS. 1 and 2, the refrigerator-freezer main body 100A includes an inner box 9 that forms the inner wall of the refrigerator-freezer main body 100A, and an outer box 10 that forms the outer wall of the refrigerator-freezer main body 100A. A vacuum heat insulating material is provided between the inner box 9 and the outer box 10. Specifically, a ceiling vacuum insulation 14a is provided on the ceiling of the refrigerator main body 100A, a left side vacuum insulation 14b is provided on the left side of the refrigerator refrigerator main body 100A, and a right side vacuum insulation is provided on the right side of the refrigerator refrigerator main body 100A. The material 14c is provided, and the back surface vacuum heat insulating material 14d is provided on the back surface of the refrigerator-freezer main body 100A. In the following description, these vacuum heat insulating materials may be collectively referred to as a vacuum heat insulating material 14.

  The vacuum heat insulating material 14 reduces the amount of heat intrusion from the outside of the refrigerator / freezer 100 to the inside (inside the refrigerator) of the refrigerator / freezer 100, and the thermal conductivity λ is 0.0020 W / m · K. Between the vacuum heat insulating material 14 and the inner box 9, urethane having a thermal conductivity λ of 0.0200 W / m · K is filled.

  As shown in FIG. 2, a fan 15 and a cooler 16 that is located below the fan 15 and generates cool air are provided behind the freezer compartment 4. A compressor 17 is provided behind the vegetable compartment 5 and below the cooler 16. The cooler 16 and the compressor 17, the condenser (not shown) and the capillary tube (not shown) constitute a refrigerant circuit. A branch air passage 24 is formed on the front side of the fan 15 to divide the cold air sent from the fan 15 into air passages that reach the respective storage chambers. The air passage branched from the branch air passage 24 to the refrigerator compartment 1 is referred to as a refrigerator compartment air passage 30, and the air passage branched from the branch air passage 24 to the freezer compartment 4 is connected to the freezer compartment air passage 31. (Refer to FIG. 2).

  An outside air temperature sensor 18 is provided in front of the upper surface of the refrigerator-freezer main body 100A, and a control means 50 is provided above the back surface of the refrigerator-freezer main body 100A. The outside air temperature sensor 18 detects outside air temperature. The control means 50 controls the opening degree of the refrigeration room air volume adjuster 26 described later based on temperature information detected by the refrigerator compartment thermistor 22 described later, and based on temperature information detected by the refrigerator compartment thermistor 23 described later. To control the compressor 17. The control means 50 is comprised by hardware, such as a circuit device which implement | achieves this function, for example. The position where the outside air temperature sensor 18 and the control means 50 are provided is not limited to the position shown in FIG.

FIG. 3 is a front view of the refrigerator-freezer 100 according to Embodiment 1 of the present invention with the door removed.
As shown in FIGS. 2 and 3, a refrigerator compartment thermistor 22, a refrigerator compartment thermistor 23, and a refrigerator air volume regulator 26 are provided on the back side of the refrigerator 100. The refrigerator compartment thermistor 22 detects the temperature in the refrigerator compartment, and is installed in the refrigerator compartment. The freezer compartment thermistor 23 detects the temperature in the freezer compartment 4 and is installed in the freezer compartment. The refrigerator compartment thermistor 22 corresponds to the temperature detecting means of the present invention. Moreover, the arrangement | positioning position of the refrigerator compartment thermistor 22 and the freezer compartment thermistor 23 which are shown by FIG. 2, FIG. 3 is an example, and is not limited to this.

  The refrigerating room air volume adjuster 26 is provided in the refrigerating room air passage 30, and the air volume supplied to the refrigerating room 1 from the branch air passage 24 by adjusting the cross-sectional area of the refrigerating room air passage 30. Adjust. A refrigerator compartment air passage 21 is formed on the refrigerator compartment air volume regulator 26 side of the refrigerator compartment 1. The refrigerator compartment air passage 21 is an air passage located downstream of the branch air passage 24, the refrigerator compartment air passage 30, and the refrigerator compartment air volume regulator 26. A refrigeration room air volume adjuster 26 is located near the entrance of the refrigeration room air path 21 (between the refrigeration room 1, the ice making room 2, and the switching room 3) in the refrigeration room air path 30. The ice making room air volume adjuster 27 adjusts the air volume supplied to the ice making room 2 and is located near the entrance of the refrigerating room air passage 21 located on the rear side of the refrigerating room (switching between the refrigerating room 1 and the ice making room 2). (Between chamber 3). The switching chamber air volume adjuster 28 adjusts the air volume supplied to the switching chamber 3 and is located on the back side of the switching chamber 3. The vegetable room air volume adjuster 29 adjusts the air volume supplied to the vegetable room 5, and is located on the back side of the switching room 3. The positions of the switching room air volume adjuster 28 and the vegetable room air volume adjuster 29 may be reversed. The freezer compartment outlet 20 is an opening that is formed on the back side of the freezer compartment 4 and communicates the inside of the freezer compartment 4 with the branch air passage 24.

  When the fan 15 rotates, the cool air cooled by the cooler 16 flows into the branch air passage 24 by the suction force of the fan 15, and from the branch air passage 24 to each regulator (refrigeration room air volume regulator 26, ice chamber air volume). The storage room (refrigeration room 1, ice making room 2, switching room 3, vegetable) through at least one of the regulator 27, the switching room air volume regulator 28, the vegetable room air volume regulator 29) and the freezer compartment outlet 20 It blows out from the blower outlet of the chamber 5 and the freezer compartment 4).

  The amount of air supplied to the freezer compartment outlet 20 is controlled by the refrigerator air volume regulator 26, the ice making air volume regulator 27, the switching room air volume regulator 28, and the vegetable room air volume regulator 29. It is determined by the opening of the air path leading to. For example, when the air volume adjuster 26 for the refrigeration room, the air volume adjuster 27 for the ice making room, the air volume adjuster 28 for the switching room, and the air volume adjuster 29 for the vegetable room all have their air paths fully closed, All of the cold air introduced into the branch air passage 24 by 15 flows into the freezer compartment outlet 20 and is supplied to the freezer compartment 4.

  The cold air blown out from the branch air passage 24 toward the refrigerating room air volume adjuster 26 passes through the refrigerating room air passage 21 located at the back of the refrigerating room, and the cold air enters the refrigerating room from the plurality of refrigerating room outlets 1c. Blown out. Next, the cold air circulated in the refrigerator compartment flows from the refrigerator compartment cold air return port 1d located on the floor of the refrigerator compartment 1 into the vegetable compartment ceiling air passage 25 of the vegetable compartment 5 located at the lower part of the refrigerator main body 100A, The cold air blown from the outlet of the vegetable compartment 5 circulates in the vegetable compartment 5 and flows into the vegetable compartment ceiling air passage 25. Thus, the cold air that has flowed into the vegetable compartment ceiling air passage 25 from different paths merges and returns to the cooler 16.

FIG. 4 is a diagram showing a structure of the refrigerator air volume adjuster 26 according to the first embodiment of the present invention.
FIG. 4A is a front view of the refrigerator air volume regulator 26.
FIG. 4B is a cross-sectional view taken along the line AA in FIG. 4A (when the baffle 33 is fully opened).

  As shown in FIG. 4 (a), the refrigerator air volume adjuster 26 includes a gear storage case 32, a baffle 33, and a cold air leakage prevention sheet made of foamed polyurethane or foamed polyethylene that is attached to the baffle 33. 34 and a frame 35. As shown in FIG. 4B, the frame 35 is formed with a cold air passage portion 36 that is an opening through which the cold air passes.

  The gear storage case 32 includes a motor (not shown), a gear (not shown), and a drive shaft (not shown), and is fixed to the frame 35 with screws (not shown). When the motor of the gear storage case 32 is driven, the baffle 33 rotates within a range of 0 to 90 degrees via the gear and the drive shaft of the gear storage case 32. The angle of the horizontal baffle 33 indicated by the dotted line in FIG. 4B is 0 degree, and the angle of the vertical baffle 33 indicated by the solid line in FIG. 4B is 90 degrees.

  When the baffle 33 rotates, the amount of cold air supplied to the refrigerator compartment 1 is adjusted. Specifically, as the angle of the baffle 33 approaches 90 degrees, the amount of cool air supplied to the refrigerating chamber 1 through the cool air passage portion 36 increases, and as the angle of the baffle 33 approaches 0 degrees, the cold air passes. The amount of cold air supplied to the refrigerator compartment 1 via the part 36 is reduced. Note that the control means 50 controls the angle of the baffle 33. Further, when the opening degree of the baffle 33 is 0 degree, the cold air leakage prevention sheet 34 comes into close contact with the outer frame rib 37 of the frame 35, and the cold air is not supplied to the refrigerator compartment 1 through the cold air passage portion 36. In the present embodiment, when the baffle 33 of the refrigerator air volume regulator 26 is in a fully open state (90 degrees), the amount of cold air supplied to the refrigerator compartment 1 is the maximum air volume. In addition, when the baffle 33 of the refrigerator air volume regulator 26 is in the fully closed state (0 degrees), the amount of cool air supplied to the refrigerator room 1 becomes the minimum air volume (cold air supply is stopped). Note that when the air volume supplied to the refrigerator compartment 1 is set to the minimum air volume, the supply of cool air does not necessarily have to be stopped completely, and a certain amount of cool air may be supplied. “Closed state” refers to a fully closed state.

  The upper limit opening of the refrigerator air volume regulator 26 is assumed to satisfy the cooling capacity (for example, so as not to deviate from the JIS standard), when the refrigerator / freezer 100 is installed and started and the load in the cabinet is overloaded. And it is designed at 90 degrees. For this reason, when the opening degree of the refrigerator air volume regulator 26 is 90 degrees, the cold air that has passed through the cold air passage 36 does not refract and blows upward without hitting the refrigerator air volume regulator 26. In addition, since the installation start-up and the overload state do not always occur, the opening degree of the refrigerator air volume adjuster 26 is adjusted according to the load in the warehouse, and the air volume supplied to the refrigerator room 1 is adjusted. Is desirable. In addition, in the case of 90 degree | times or more, since the area of the cold passage part 36 does not change and the air volume blown off does not change, it is set to 90 degree | times at maximum.

  In addition, if the air volume supplied to the refrigerator compartment 1 can be adjusted in multiple stages within the range from the state of the minimum air volume to the state of the maximum air volume, the specific configuration of the air volume regulator 26 for the refrigerator compartment Is not limited to that illustrated in FIG. Moreover, the width | variety of the air volume adjustment of the refrigerator air volume regulator 26 is not limited, but should just adjust an air volume continuously or in steps.

  The ice making air volume regulator 27, the switching room air volume regulator 28, and the vegetable room air volume regulator 29 have the same structure as the refrigerator air volume regulator 26. It is desirable to set the area of the cold air passage 36. That is, it is generally desirable that the refrigerator air volume regulator 26 be larger in size and dimensions of the air volume regulator than other air volume regulators.

  Below, the control method of the air volume regulator 26 for refrigerator compartments of a comparative example and this Embodiment 1 is demonstrated using FIG.5 and FIG.6. For convenience of explanation, the comparative example will be described with the same reference numerals as those in the first embodiment.

  FIG. 5 shows the temperature change of the refrigerator compartment 1 when the refrigerator compartment of the refrigerator-freezer 100 according to the comparative example has a low load, the operation of the air volume regulator 26 for the refrigerator compartment, the temperature change of the refrigerator compartment 4, and the operation of the compressor 17. It is a time chart which shows. FIG. 5 is obtained under the conditions that the internal volume of the refrigerator compartment 1 is 271 L, the thermal conductivity λ of the vacuum heat insulating material 14 is 0.0020 W / m · K, and the outside air temperature is 30 degrees. Under this condition, the operation time from the start of operation of the compressor 17 to the stop thereof was 190 minutes. The operation of the compressor 17 of the refrigerator-freezer 100 according to the comparative example is controlled based on the freezer temperature. Specifically, when the freezer temperature reaches the upper limit temperature, the operation of the compressor 17 is started (ON), and when the freezer temperature reaches the lower limit temperature, the operation of the compressor 17 is stopped (OFF).

  In the comparative example, the control means 50 switches the refrigerator air volume regulator 26 to a fully open state or a fully closed state using the temperature detected by the refrigerator compartment thermistor 22. Specifically, if the refrigerator air volume regulator 26 of the comparative example is the same as that shown in FIG. 4, the refrigerator air volume regulator 26 when the temperature of the refrigerator thermistor 22 reaches a predetermined upper limit temperature. The opening degree of the baffle 33 is fully opened (90 degrees), and when the temperature of the refrigerator compartment thermistor 22 reaches a predetermined lower limit temperature, the opening degree of the baffle 33 of the refrigerator air volume regulator 26 is fully closed ( 0 degrees).

  At time t0, the refrigerator compartment temperature is the upper limit temperature, the refrigerator air volume regulator 26 is fully open, the freezer compartment temperature is the upper limit temperature, and the compressor 17 is ON. If the refrigeration room air flow regulator 26 is kept in a fully open state when the load in the refrigeration room is low, the amount of air supplied to the refrigeration room 1 increases more than necessary. The temperature is reached (time t1).

  When the control means 50 determines that the temperature of the refrigerator compartment thermistor 22 has reached the lower limit temperature (time t1), the controller 50 switches the refrigerator air volume regulator 26 to the fully closed state. At this time, since the amount of air supplied to the refrigerator compartment 1 is reduced as compared with the fully opened state, the temperature of the refrigerator compartment gradually increases, while the amount of air supplied to the refrigerator compartment 1 is reduced and supplied to the freezer compartment 4. Since the air volume increases when compared with the fully open state, the freezer temperature gradually decreases.

  Here, from the time when the temperature of the refrigerator compartment thermistor 22 reaches the upper limit temperature until the temperature decreases again to the lower limit temperature, the refrigerator air volume regulator 26 is fully opened (time t0 to t1), and the refrigerator compartment temperature is rapidly reduced. To reach the lower temperature limit. The refrigeration room air flow controller 26 when the cold air is supplied into the refrigeration room 1 is designed to be fully open when the refrigerator / freezer 100 is installed and activated or the load in the refrigerator is overloaded. However, the refrigerator-freezer 100 is not always installed and activated or overloaded. Therefore, when the inside of the refrigerator compartment 1 is lightly loaded, the air volume to the refrigerator compartment 1 is too large when the refrigerator air volume regulator 26 is fully opened. If the amount of cool air flowing into the refrigerator compartment 1 is too large, the speed until the refrigerator compartment thermistor 22 detects the lower limit temperature is also increased. For this reason, the temperature of the refrigerator compartment thermistor 22 may reach the lower limit temperature before the cold air supplied into the refrigerator compartment is sufficiently circulated into the refrigerator compartment to reach a uniform temperature. In this case, although the temperature of the refrigerator compartment thermistor 22 has reached the lower limit temperature, the inside of the refrigerator compartment becomes higher than the temperature detected by the refrigerator compartment thermistor 22 as a whole. Therefore, when the temperature detected by the refrigerator compartment thermistor 22 reaches the lower limit temperature and the refrigerator air volume regulator 26 is fully closed, the interior of the refrigerator compartment 1 is not cooled to the lower limit temperature as a whole. The refrigeration room temperature detected by the temperature rises rapidly and reaches the upper limit temperature (time t2).

When the control means 50 determines that the temperature detected by the refrigerator compartment thermistor 22 has reached the upper limit temperature (time t2), the controller 50 switches the refrigerator air volume regulator 26 to the fully open state.
Switching between opening and closing of the refrigerator air volume regulator 26 as described above is repeated until the freezer temperature reaches the lower limit (time t3), and the refrigerator temperature changes between the upper limit temperature and the lower limit temperature.

When it is determined that the freezer temperature has reached the lower limit temperature (time t3), the control unit 50 stops the operation of the compressor 17 (OFF). When the operation of the compressor 17 stops, the freezer temperature rises and reaches the upper limit temperature (time t4).
When it is determined that the freezer temperature has reached the upper limit temperature (time t4), the control unit 50 starts (ON) the operation of the compressor 17. The subsequent change in the temperature of the refrigerator compartment and the open / close state of the refrigerator air volume regulator 26 are the same as the state after the operation of the refrigerator-freezer 100 is started.

  Thus, in the comparative example, the control means 50 switches the refrigerator air volume regulator 26 to the fully open state or the fully closed state based on the temperature detected by the refrigerator compartment thermistor 22. In the comparative example, even if the refrigeration room has a low load, the refrigeration room air volume regulator 26 is fully opened, so that cold air is excessively supplied into the refrigeration room 1.

  For this reason, opening and closing of the refrigerator air volume regulator 26 occurs a plurality of times, the air volume supplied to the freezer compartment 4 is insufficient, and the cooling time until the temperature of the freezer compartment 4 reaches the control temperature becomes longer. Here, the compressor 17 stops when the temperature of the freezer compartment thermistor 23 reaches the lower limit temperature of the freezer compartment 4. Therefore, if the cooling time of the freezer compartment 4 becomes long, the time until the compressor 17 stops is extended and the power consumption is deteriorated.

Then, against the background as described above, the refrigerator-freezer 100 according to the first embodiment is configured as follows.
FIG. 6 shows the temperature change of the refrigerator compartment 1 when the refrigerator compartment of the refrigerator-freezer 100 according to Embodiment 1 of the present invention has a low load, the operation of the air volume regulator 26 for the refrigerator compartment, the temperature change of the refrigerator compartment 4, and the compression. 18 is a time chart showing the operation of the machine 17. FIG. 6 is obtained under the conditions that the internal volume of the refrigerator compartment 1 is 271 L, the thermal conductivity λ of the vacuum heat insulating material 14 is 0.0020 W / m · K, and the outside air temperature is 30 degrees. Note that the operation of the compressor 17 of the refrigerator-freezer 100 according to Embodiment 1 is controlled based on the freezer temperature, as in the comparative example. Specifically, when the freezer temperature reaches the upper limit temperature, the operation of the compressor 17 is started (ON), and when the freezer temperature reaches the lower limit temperature, the operation of the compressor 17 is stopped (OFF).

  In the first embodiment, similarly to the comparative example, the control unit 50 switches the refrigerator air volume regulator 26 to an open state or a closed state based on the temperature detected by the refrigerator compartment thermistor 22. The difference between the first embodiment and the comparative example is that the control means 50 controls the opening when the refrigerator air volume regulator 26 is in an open state based on the load in the refrigerator in a plurality of stages. is there.

  At time t0, the refrigerator compartment temperature is the upper limit temperature, the refrigerator air volume regulator 26 is in the open state (for example, 90 degrees), the freezer compartment temperature is the upper limit temperature, and the compressor 17 is in the ON state. The control means 50 opens the refrigerator air volume adjuster 26, and further adjusts the opening of the refrigerator air volume adjuster 26 based on the load in the refrigerator compartment. At this time, the larger the load in the refrigerator compartment, the larger the opening degree of the refrigerator air volume regulator 26 increases the amount of cold air supplied to the refrigerator compartment 1. In the present embodiment, since the opening degree of the refrigerator air volume regulator 26 is variable in the range from 0 degrees to 90 degrees, the control means 50 sets the opening degree of the refrigerator air volume regulator 26 to 0 degrees. Over 90 degrees and below 90 degrees. Then, an amount of cold air corresponding to the opening degree of the refrigerator air volume regulator 26 is supplied to the refrigerator compartment 1, and the refrigerator compartment temperature detected by the refrigerator compartment thermistor 22 gradually decreases to reach the lower limit temperature (time t1). In FIG. 6, the graph when the refrigerator air volume regulator 26 is “open” is a straight line for the purpose of illustration, but the opening degree of the refrigerator air volume regulator 26 at this time is the above-described opening degree. As it differs according to the load in the refrigerator compartment, it is not necessarily constant.

In FIG. 6, the freezer compartment temperature is shown to be constant until the refrigerator compartment temperature reaches the lower limit temperature. However, when the opening degree of the refrigerator air volume regulator 26 is small. Since the amount of air supplied into the freezer compartment 4 increases, the freezer compartment temperature actually decreases gradually.
A specific method for calculating the load in the refrigerator compartment will be described later.

  When the controller 50 determines that the temperature of the refrigerator compartment thermistor 22 has reached the lower limit temperature (time t1), the controller 50 closes the refrigerator air volume regulator 26 (0 ° C.). When the refrigerator air volume regulator 26 is in the closed state, the amount of air supplied to the refrigerator room 1 is lost, the temperature of the refrigerator compartment gradually increases, the amount of air supplied to the freezer compartment 4 increases, and the temperature of the refrigerator compartment gradually decreases. The freezer temperature reaches the lower limit temperature (time t3).

  When the temperature of the freezer compartment thermistor 23 reaches the lower limit temperature (time t3), the control means 50 stops the operation of the compressor 17. When the operation of the compressor 17 is stopped (OFF), the freezer temperature rises to reach the upper limit temperature, and the temperature of the refrigerator compartment thermistor 22 also reaches the upper limit temperature (time t2).

  When the control means 50 determines that the temperature of the refrigerator compartment thermistor 22 has reached the upper limit temperature, it switches the refrigerator compartment air volume regulator 26 to the open state and starts (ON) the operation of the compressor 17 (time t2). Then, the control means 50 controls the angle of the refrigerator air volume adjuster 26 in the open state within the range from the lower limit temperature to the upper limit temperature based on the load in the refrigerator compartment. The subsequent change in the temperature of the refrigerator compartment and the open / close state of the refrigerator air volume regulator 26 are the same as the state after the operation of the refrigerator-freezer 100 is started.

  In this way, by controlling the opening degree of the refrigerator air volume regulator 26 within the range from the lower limit temperature to the upper limit temperature based on the load in the refrigerator compartment, the amount of air supplied to the refrigerator compartment 1 is minimized. Can be suppressed. For this reason, the number of times of opening and closing the refrigerator air volume adjuster 26 from when the compressor 17 starts operating once until it stops can be set to one. Therefore, the compressor 17 can be stopped earlier than the comparative example, and the power consumption can be reduced.

  In addition, since the operation time of the compressor 17 is also dependent on the internal volume of the refrigerator compartment 1, a heat insulation structure, and external temperature, the operation time of the compressor 17 is not limited to what was illustrated in FIG. 5, FIG. . For the same reason, the number of opening times of the refrigerator air volume regulator 26 in the comparative example of FIG. 5 is not limited to the example of FIG.

Next, determination of the load in the refrigerator compartment 1 according to the first embodiment will be specifically described. In the first embodiment, the load in the refrigerator compartment 1 is determined based on the amount of decrease in the temperature in the refrigerator compartment 1.
FIG. 7 is a graph showing a temperature change of the refrigerator compartment thermistor 22 when the refrigerator compartment according to Embodiment 1 of the present invention is under a high load and a low load.

  In the graph shown in FIG. 7, the horizontal axis represents time, and the vertical axis represents the temperature detected by the refrigerator compartment thermistor 22. Moreover, the amount of temperature decrease of the refrigerator compartment thermistor 22 between time T1 and time T2 when the refrigerator compartment is under high load is indicated by (xy) ° C. In addition, the amount of temperature decrease of the refrigerator compartment thermistor 22 from time T1 to time T2 when the refrigerator compartment is under low load is indicated by (a−b) ° C. As shown in FIG. 7, the temperature decrease amount (xy) ° C. when the refrigeration chamber is under a high load is smaller than the temperature decrease amount (ab) ° C. when the refrigeration chamber is under a low load. This is because the refrigerator compartment is less likely to be cooled when the refrigerator compartment is heavily loaded than when the refrigerator compartment is lightly loaded. Thus, the amount of temperature drop in the refrigerator compartment varies depending on the load state in the refrigerator compartment. Therefore, in the first embodiment, the load state of whether the refrigeration room is a high load or a low load is determined using the temperature decrease amount in the refrigeration room.

Next, a specific example of determination of the load in the refrigeration room based on the temperature drop amount in the refrigeration room will be described.
FIG. 8 is a table showing an example of the temperature decrease amount of the refrigerator compartment thermistor 22 according to the load in the refrigerator compartment of the refrigerator-freezer 100 according to Embodiment 1 of the present invention.
In the example shown in FIG. 8, the refrigerator compartment thermistor 22 is 60 under the conditions where the internal volume of the refrigerator compartment 1 is 271 L, the thermal conductivity λ of the vacuum heat insulating material 14 is 0.0020 W / m · K, and the outside air temperature is 30 degrees. The amount of temperature decrease when the partial temperature is detected is shown for each load in the refrigerator compartment.
In the example of FIG. 8, when the predetermined load (the reference load) is in the refrigerator compartment 1, the temperature decrease amount of the refrigerator compartment thermistor 22 was 3.1 ° C. For example, the amount of temperature decrease is set as a reference value A for determining the load in the refrigerator compartment as a high load or a low load.

When the temperature drop per unit time of the refrigerator compartment thermistor 22 is 0.9 ° C. (FIG. 8), the control means 50 determines that the load is high because it is smaller than the reference value A (3.1 ° C.). The opening degree of the refrigerator air volume regulator 26 is increased in accordance with, for example, the difference between the reference value A and the temperature drop amount of the refrigerator compartment thermistor 22.
On the other hand, when the temperature decrease per unit time of the refrigerator compartment thermistor 22 is 4.2 ° C. (FIG. 8), the control means 50 is larger than the reference value A (3.1 ° C.) and thus has a low load. Determination is made, and the opening degree of the air volume adjuster 26 for the refrigerating room is made smaller, for example, according to the difference between the reference value A and the temperature decrease amount of the refrigerating room thermistor 22.

The reference value A is not limited to the above-described numerical value (3.1 ° C.) because it depends on the internal volume of the refrigerator compartment 1, the heat insulating structure, and the outside air temperature.
Further, a reference value A corresponding to the outside temperature detected by the outside temperature sensor 18 may be provided.
Further, in FIG. 8, the thermal conductivity of the vacuum heat insulating material 14 is shown as one index indicating the performance of the heat insulating structure of the refrigerator / freezer 100. It is also preferable to consider other structures that affect the heat insulation performance of the.

Hereinafter, with reference to FIG. 6 described above, the load in the refrigerator compartment 1 is determined based on the temperature drop amount of the refrigerator compartment thermistor 22, and the refrigerator air volume regulator 26 is opened based on the load in the refrigerator compartment 1. The operation and action of the refrigerator-freezer 100 of the first embodiment for controlling the degree will be specifically described.
At time t <b> 0 shown in FIG. 6, the control means 50 opens the refrigerator air volume regulator 26. At this time, the control means 50 determines the load in the refrigerator compartment using the temperature decrease amount of the refrigerator compartment thermistor 22, and controls the opening degree of the refrigerator air volume regulator 26 based on the determined load. For this reason, the refrigerator compartment 1 is supplied with an amount of cold air corresponding to the load in the refrigerator compartment 1. Therefore, for example, when the load in the refrigerator compartment 1 is low, an excessive amount of cold air is not supplied into the refrigerator compartment 1, and the amount of cold air supplied to the freezer compartment 4 is relatively increased. Can do. Therefore, the cooling rate of the freezer compartment 4 can be increased.

And if the control means 50 judges that the temperature of the refrigerator compartment thermistor 22 reached the minimum temperature (time t1), it will make the refrigerator air volume regulator 26 a closed state (0 degree | times).
As described above, according to the first embodiment, when the refrigerator compartment 1 has a low load, it is possible to suppress supply of excessive cold air into the refrigerator compartment 1, so that the amount of cold air supplied to the refrigerator compartment 1 is reduced. The air volume to the freezer compartment 4 can be increased by the reduced amount, and the freezer compartment 4 can be easily cooled. Therefore, the compressor 17 can be stopped quickly, and the operation time of the compressor 17 can be shortened, so that there is an effect of reducing power consumption.

Next, the relationship between the opening degree of the refrigerator air volume regulator 26 according to Embodiment 1 and the air volume supplied to the refrigerator room 1 will be described.
FIG. 9 is a graph showing an example of the relationship between the opening degree of the refrigerator air volume regulator 26 of the refrigerator-freezer 100 according to Embodiment 1 of the present invention and the air volume supplied to the refrigerator room 1.

  As shown in FIG. 9, the increase in the air volume per unit angle when the opening degree of the refrigerator air volume regulator 26 is in the range of 40 degrees to 90 degrees indicates that the opening degree of the refrigerator air volume regulator 26 is 0 degrees. It is smaller than the increase in air volume per unit angle in the range of ˜40 degrees. That is, the air volume depending on the area of the cool air passage portion 36 when the opening degree of the air volume adjuster 26 for the refrigerator compartment is 40 degrees, and the cold air passage section 36 when the air volume adjuster 26 for the refrigerator compartment is 90 degrees (fully open). The change with the air volume due to the area is small.

  For this reason, when the load in the refrigerator compartment is a high load, the opening amount of the refrigerator air volume adjuster 26 is set so as to exceed approximately 40 degrees, thereby ensuring a sufficient amount of air supplied to the refrigerator compartment 1. The time until the refrigerator compartment temperature reaches the lower limit temperature is shortened. If the time until the refrigerator compartment temperature reaches the lower limit temperature becomes earlier, the time until the refrigerator air volume regulator 26 is closed becomes earlier, the amount of air supplied to the freezer compartment 4 increases, and the temperature of the freezer compartment increases. The time until the lower limit temperature is reached also becomes faster. Therefore, the compressor 17 can be stopped quickly to shorten the operation time, so that the power consumption can be reduced. In the first embodiment, the graph having the characteristics shown in FIG. 9 is used. However, this is an example and is not particularly limited.

  As shown in FIG. 9, the increase in the air volume per unit angle in the range of 0 to 40 degrees of opening of the refrigerator air volume adjuster 26 is 40 degrees of the opening of the refrigerator air volume adjuster 26. It is smaller than the air volume per unit angle in the range of ˜90 degrees. That is, the air volume according to the area of the cold air passage portion 36 when the opening degree of the refrigerator air volume regulator 26 is 40 degrees, and the cold air passage section when the refrigerator air volume regulator 26 is 0 degrees (fully closed). The change with the air volume by the area of 36 is large.

  For this reason, when the load in the refrigerating room is low, the air volume supplied to the refrigerating room 1 is suppressed to the minimum necessary by setting the opening degree of the air quantity regulator 26 for the refrigerating room to about 40 degrees or less. The amount of air supplied to the freezer compartment 4 is increased and the freezer compartment 4 is easily cooled. Therefore, the compressor 17 can be stopped quickly to shorten the operation time, so that the power consumption can be reduced.

  In addition, since the air volume supplied into the refrigerator compartment depends on the area of the cold passage portion 36 of the refrigerator air volume regulator 26 and the internal volume of the refrigerator compartment 1, the refrigerator compartment described in the first embodiment has a low load. And it is not limited to the reference | standard of the opening degree at the time of determining with high load.

  As described above, the refrigerator-freezer 100 according to Embodiment 1 controls the amount of cold air when supplying cold air to the refrigerator compartment 1 based on the load in the refrigerator compartment 1. For this reason, for example, when the load in the refrigerating chamber is low, it is possible to prevent the refrigerating chamber 1 from being supplied with unnecessarily cold air, thereby relatively reducing the amount of cold air supplied to the freezing chamber 4. Since it can be increased, the operation time of the compressor 17 is shortened, and the power consumption accompanying the operation of the compressor 17 can be reduced.

Embodiment 2. FIG.
Since the room arrangement and the refrigerator air passage in the second embodiment are the same as those in the first embodiment, description thereof is omitted.
In the first embodiment, the reference value A and the temperature drop amount of the refrigerator compartment thermistor 22 are compared to determine the load in the refrigerator compartment. On the other hand, in this Embodiment 2, the load in a refrigerator compartment is determined based on the open time of the refrigerator compartment left door 1a or the refrigerator compartment right door 1b. In the second embodiment, as in the first embodiment, the controller 50 opens the refrigerator air volume regulator 26 using the temperature of the refrigerator compartment thermistor 22 detected at predetermined time intervals. Switch between state and closed state.

  FIG. 10 is a graph showing the refrigerator temperature for each open time of the refrigerator compartment 1 of the refrigerator-freezer 100 according to Embodiment 2 of the present invention. Specifically, it represents the temperature of the refrigerator compartment 1 for each opening time of the refrigerator compartment left door 1a and the refrigerator compartment right door 1b when the number of times the refrigerator compartment left door 1a or refrigerator compartment right door 1b is opened 50 times per hour. ing. In addition, the above-mentioned opening frequency is detected by an open / close sensor (not shown), for example. Moreover, the above open time is measured by a timer (not shown), for example.

As shown in FIG. 10, the temperature in the refrigerator compartment is about 1 ° C. when the opening time per time is 5 seconds, and the temperature in the refrigerator room is about 2 ° C. when the opening time per time is 10 seconds. Yes, the temperature in the refrigerator compartment was about 10 ° C. when the opening time per time was 15 seconds, and the temperature in the refrigerator room was about 15 ° C. when the opening time per time was 20 seconds.
Thus, it turns out that the temperature in a refrigerator compartment becomes high when the opening time of a door becomes long. That is, by detecting the opening time, it can be determined whether the refrigerator compartment has a low load or a high load. The graph shown in FIG. 10 is obtained under the conditions where the internal volume of the refrigerator compartment 1 is 271 L, the thermal conductivity λ of the vacuum heat insulating material 14 is 0.0020 W / m · K, and the outside air temperature is 32 degrees. It is.

  Therefore, in the second embodiment, in order to determine the load in the refrigerator compartment as a high load or a low load, the opening time per operation of the refrigerator door left door 1a and the refrigerator door right door 1b is used as a reference value for load determination. To do. Hereinafter, an example of a method for determining the reference value B, which is a reference value for load determination, will be described.

FIG. 11 is a table showing the survey results on the water temperature of the plastic bottles in the pockets of the refrigerator compartment door of the refrigerator-freezer 100 according to Embodiment 2 of the present invention.
As shown in FIG. 11, many people feel that when the water temperature of the PET bottle is 0 to 3 ° C., it is too cold or feels like a tooth, and when the water temperature of the PET bottle is 4 to 7 ° C. Many people felt that when the water temperature of the PET bottle was 8 to 10 ° C., it was not warm or cold. Based on the result of this investigation, for example, the opening time per time when the temperature of the refrigerator compartment is 10 ° C. is set as the reference value B. Specifically, as shown in FIG. 10, when the temperature in the refrigerator compartment is 10 ° C., the opening time per time is 15 seconds.

If the control means 50 determines that the open time of the refrigerator compartment left door 1a and the refrigerator compartment right door 1b is longer than the reference value B of 15 seconds, the temperature of the refrigerator compartment 1 tends to increase, so the load in the refrigerator compartment is reduced. It is predicted that the load is high, and the opening of the refrigerator air volume regulator 26 is controlled to be large.
On the other hand, if the control means 50 determines that the opening time of the refrigerator compartment left door 1a and the refrigerator compartment right door 1b is shorter than the reference value B of 15 seconds, the temperature of the refrigerator compartment 1 is not easily increased. The load is predicted to be low, and control is performed so that the opening degree of the refrigerator air volume regulator 26 is reduced.

Hereinafter, referring to FIG. 6 described above, the load in the refrigerator compartment 1 is determined based on the opening time of the door of the refrigerator compartment 1, and the air volume regulator 26 for the refrigerator compartment is opened based on the load in the refrigerator compartment 1. The operation and action of the refrigerator-freezer 100 of the second embodiment for controlling the degree will be specifically described.
At time t <b> 0 shown in FIG. 6, the control means 50 opens the refrigerator air volume regulator 26. At this time, the control means 50 determines the load in the refrigerator compartment using the temperature decrease amount of the refrigerator compartment thermistor 22, and controls the opening degree of the refrigerator air volume regulator 26 based on the determined load. For this reason, the refrigerator compartment 1 is supplied with an amount of cold air corresponding to the load in the refrigerator compartment 1. Therefore, for example, when the load in the refrigerator compartment 1 is low, an excessive amount of cold air is not supplied into the refrigerator compartment 1, and the amount of cold air supplied to the freezer compartment 4 is relatively increased. Can do. Therefore, the cooling rate of the freezer compartment 4 can be increased.

And if the control means 50 judges that the temperature of the refrigerator compartment thermistor 22 reached the minimum temperature (time t1), it will make the refrigerator air volume regulator 26 a closed state (0 degree | times).
As described above, according to the first embodiment, when the refrigerator compartment 1 has a low load, it is possible to suppress supply of excessive cold air into the refrigerator compartment 1, so that the amount of cold air supplied to the refrigerator compartment 1 is reduced. The air volume to the freezer compartment 4 can be increased by the reduced amount, and the freezer compartment 4 can be easily cooled. Therefore, the compressor 17 can be stopped quickly, and the operation time of the compressor 17 can be shortened, so that there is an effect of reducing power consumption.

  The reference value B depends on the internal volume of the refrigerator compartment 1, the heat insulating structure, the outside air temperature, the number of times the refrigerator compartment left door 1a and the refrigerator compartment right door 1b are opened, and thus the refrigerator compartment left door 1a and refrigerator compartment as described above. It is not limited to the opening time of the right door 1b.

  Moreover, you may combine Embodiment 1, 2 mentioned above. That is, the load in the refrigerator compartment is calculated using the reference value A within a certain predetermined time range, the load in the refrigerator compartment is calculated using the reference value B within another predetermined time range, and the air volume regulator 26 for the refrigerator compartment is calculated. The degree of opening may be controlled.

  In the first and second embodiments, the control unit 50 determines whether the refrigeration room has a high load or a low load based on the reference value A or the reference value B. The determination level is not limited to two stages, and may be three or more stages. Specifically, for example, the load is determined in three stages, such as level 1, level 2, and level 3, in order of increasing load. When the load is level 1, the opening degree of the refrigerator air volume regulator 26 is set to 20 degrees. When it is 2, the opening degree may be 40 degrees, and when it is level 3, the opening degree may be 60 degrees.

  DESCRIPTION OF SYMBOLS 1 Refrigerating room, 1a Refrigerating room left door, 1b Refrigerating room right door, 1c Refrigerating room outlet, 1d Refrigerating room cold air return port, 2 Ice making room, 2a Ice making room door, 3 Switching room, 3a Switching room door, 4 Freezing room 4a Freezer compartment door, 5 Vegetable compartment, 5a Vegetable compartment door, 7 Partition plate, 9 Inner box, 10 Outer box, 12 Operation panel, 14 Vacuum insulation, 14a Ceiling vacuum insulation, 14b Left side vacuum insulation, 14c Right side vacuum insulating material, 14d Back vacuum insulating material, 15 Fan, 16 Cooler, 17 Compressor, 18 Outside temperature sensor, 20 Freezer outlet, 21 Refrigerated room air passage, 22 Refrigerated room thermistor, 23 Freezer Thermistor, 24 branch air channel, 25 vegetable room ceiling air channel, 26 air conditioner for refrigerator room, 27 air volume controller for ice making room, 28 air volume controller for switching room, 29 air volume controller for vegetable room, 30 air conditioner for cold room Path, 31 air path for freezer, 32 gear storage case, 33 baffle, 34 cold air leakage prevention sheet, 35 frame, 36 cold air passage, 37 outer frame rib, 50 control means, 100 freezer refrigerator, 100A freezer refrigerator body, A Reference value, B reference value, λ thermal conductivity.

Claims (7)

A refrigerator room,
A freezer room,
A compressor whose operation is controlled based on the temperature in the freezer compartment;
A cooler that generates cold air using a refrigerant supplied from the compressor;
A fan for guiding cold air generated by the cooler to the inside of the refrigerator compartment and the inside of the freezer compartment;
A branch air passage formed on the downstream side of the fan, a refrigerating chamber air passage communicating the branch air passage and the refrigerating chamber, and a freezer compartment air passage communicating the branch air passage and the freezer compartment ,
The air volume for the refrigerator compartment that is provided in the air passage for the refrigerator compartment and adjusts the amount of cold air supplied from the air passage for the refrigerator compartment to the refrigerator compartment continuously or stepwise between the minimum air amount and the maximum air amount. A regulator,
Temperature detecting means for detecting the temperature inside the refrigerator compartment;
When the temperature detected by the temperature detecting means reaches the lower limit temperature, the air temperature controller for the refrigerator compartment is controlled so that the amount of the cold air supplied to the refrigerator compartment becomes the minimum air volume, and the temperature detecting means detects the temperature. Control means for controlling the refrigeration room air volume adjuster so as to increase the amount of cold air than the minimum air volume when the reached temperature reaches the upper limit temperature,
The control means includes
The refrigerator-freezer characterized by controlling the quantity of cold air when increasing the quantity of cold air rather than the minimum air volume based on the load in the refrigerator compartment. The control means includes
The refrigerator / freezer according to claim 1, wherein the load is determined based on a decrease in temperature detected by the temperature detection unit. A timer for detecting the opening time of the refrigerator compartment door;
The control means includes
2. The refrigerator-freezer according to claim 1, wherein the load is determined based on an opening time per one time of the door of the refrigerator compartment detected by the timer. The refrigerator air volume regulator is
A damper device that opens or closes the air passage for the refrigerator compartment continuously or stepwise;
The said control means controls the opening degree of the said damper apparatus based on the load in the said refrigerator compartment. The refrigerator-freezer as described in any one of Claims 1-3 characterized by the above-mentioned. It has an outside temperature sensor that detects the outside temperature,
The control means includes
The air conditioner for the refrigerator compartment is controlled based on the load in the refrigerator compartment and the outside air temperature detected by the outside air temperature sensor. Freezer refrigerator. The temperature detecting means includes
It is a refrigerator compartment thermistor installed in the back side in the refrigerator compartment. The refrigerator-freezer as described in any one of Claims 1-5 characterized by the above-mentioned. The refrigerator air volume regulator is
It is installed in the back side of the said refrigerator compartment. The refrigerator-freezer as described in any one of Claims 1-6 characterized by the above-mentioned.

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