JPH11304328A - Cooling operation controller of refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator which can raise the cooling efficiency of a freezing cycle and cool both of a freezing room and a refrigerating room with a cooler at a proper evaporation temperature. SOLUTION: This controller has a refrigerating room 14 and a freezing room 22 heat-insulated from each other. The cooling inside the refrigerator is performed, by switching the refrigerating room cooling operation to circulate a refrigerant to an evaporator 50 for refrigeration and an evaporator 52 for freezing, and the freezing room-cooling operation to circulate the refrigerant only to the evaporator 52 for freezing alternately by means of a three-way valve 68. The initial operation time ratio between both cooling operations is set in advance. Then, the number of revolution in operation of a compressor 46 required for each cooling operation is obtained, based on the operation time ratio, the required cooling capacity wherein the ambient temperature is taken into consideration, and others.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator cooling operation control device.

[0002]

2. Description of the Related Art In a conventional refrigerator in which a freezer compartment and a refrigerator compartment are cooled by two evaporators, a refrigerating evaporator and a refrigerating evaporator are connected in series in a refrigerant circuit. Was. In addition, the refrigerating cycle is configured by reducing the aperture of the refrigerating evaporator without having a cooling blower in each of the freezing compartment and the refrigerating compartment.

[0003]

However, in the refrigerator configured as described above, the cooling efficiency of the refrigeration cycle is reduced because the refrigerator having a relatively high temperature is cooled by a low-temperature evaporator. There was a problem.

[0004] In the above-mentioned refrigerator, the temperature of the refrigerating evaporator becomes extremely low even when the freezer compartment is cooled. However, there is also a problem that the refrigeration evaporator is liable to frost due to high humidity in the refrigeration room. When frost is formed on the evaporator for refrigeration in this way, the heat exchange efficiency of the refrigeration evaporator is reduced and the power consumption is increased. There is a problem that compression occurs and the reliability of components provided in the refrigeration cycle is reduced.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to improve the cooling efficiency of a refrigeration cycle and to set both a freezing room and a refrigerating room at an appropriate evaporation temperature. To provide a refrigerator that can be cooled by an evaporator.

[0006]

According to the first aspect of the present invention, there is provided a refrigerating machine provided with a compressor, a condenser, a refrigerating expansion device, a refrigerating evaporator provided with a refrigerating blower, and a refrigerating blower. The evaporator and the evaporator are sequentially connected in a ring shape, and the refrigerant branch pipe is branched from between the condenser and the refrigeration throttle device.The refrigerant branch pipe is provided with a refrigeration throttle device, and the downstream side of the refrigerant branch pipe is connected to the refrigerant branch pipe. A refrigerant circuit connected between the refrigerating evaporator and the refrigerating evaporator, and further provided with flow path switching means for switching the distribution destination of the refrigerant flowing out of the condenser between the refrigerating evaporator side and the refrigerant branch pipe side. A cooling chamber cooling operation performed by switching the flow path switching means to the refrigeration evaporator side and stopping the refrigeration blower while driving the refrigeration blower, and switching the flow path switching means to the refrigerant branch pipe side and refrigeration. For refrigeration while driving air blower A refrigerator cooling operation control apparatus characterized by performing the freezing compartment cooling operation performed by the wind machine is stopped by switching the time ratio alternately.

According to a second aspect of the present invention, there is provided a compressor having a variable capacity,
A condenser, a refrigeration throttle device, a refrigeration evaporator provided with a refrigeration blower, and a refrigeration evaporator provided with a refrigeration fan are sequentially connected in a ring shape. And a refrigerant branch pipe branched from between the refrigerant branch pipe and the refrigerant branch pipe. The refrigerant branch pipe is provided with a refrigerating throttle device, and the downstream side of the refrigerant branch pipe is connected between the refrigeration evaporator and the refrigerating evaporator. A refrigerant circuit provided with a flow path switching means for switching the refrigerant between the refrigeration evaporator side and the refrigerant branch pipe side, the refrigeration chamber cooling operation for switching the flow path switching means to the refrigeration evaporator side and driving the refrigeration blower And, by switching the flow path switching means to the refrigerant branch pipe side, the compression function force when performing each cooling operation and the operation continuation time ratio between the two cooling operations are set by the respective reference temperature and the outside air temperature driving the refrigeration blower. And freezer compartment cooling operation and refrigerator compartment It is refrigerator cooling operation control device according to claim which has been made and a retirement operation to alternate.

According to a third aspect of the present invention, there is provided a refrigerator having a refrigerating compartment and a refrigerating compartment and having a variable capacity compressor, a condenser, a refrigerating expansion device, a refrigerating evaporator provided with a refrigerating blower, and a refrigerating machine. And a refrigerating evaporator provided with a blower for the refrigerant are sequentially connected in a ring shape, and a refrigerant branch pipe is branched from between the condenser and the refrigerating throttle device, and the refrigerant branch pipe is provided with a refrigerating throttle device. A flow path that connects the downstream side of the refrigerant branch pipe between the refrigeration evaporator and the refrigerating evaporator, and further switches the distribution destination of the refrigerant flowing out of the condenser between the refrigeration evaporator side and the refrigerant branch pipe side. A refrigerant circuit provided with switching means, a cooling chamber cooling operation performed by switching the flow path switching means to the refrigeration evaporator side and driving the refrigeration blower while stopping the refrigeration blower, and a flow path switching means. Switch to refrigerant branch side and send for freezing A refrigerator cooling operation control device that alternately switches between the freezing room cooling operation performed by stopping the refrigeration blower while driving the refrigerator, and a refrigerator room temperature sensor that detects the temperature in the refrigerator room, A freezer compartment temperature sensor for detecting the temperature inside the freezer compartment, an outside air temperature sensor for detecting the outside air temperature, and control means are provided, and the control means is set for each of the freezer compartment cooling operation and the refrigerator compartment cooling operation. Using the predetermined reference temperature and the outside air temperature, the compression capacity of the compressor when performing each of the cooling operations and the operation duration ratio between the two cooling operations are grasped, and the grasped compression capacity and operation duration ratio are grasped. The cooling operation control device for a refrigerator is characterized in that the cooling room cooling operation and the refrigerator room cooling operation are alternately performed based on the above.

According to a fourth aspect of the present invention, the control means is configured to determine a difference between the inside temperature of the freezer compartment and a predetermined upper limit temperature of the freezer compartment and a difference between the inside temperature of the refrigerator compartment and the predetermined upper limit temperature of the refrigerator compartment. 4. The cooling operation control device for a refrigerator according to claim 3, wherein adjustment of the compression capacity of the compressor and adjustment of the rotation speed of each of the blowers are performed based on the adjustment.

According to a fifth aspect of the present invention, there is provided the cooling operation control apparatus for a refrigerator according to the fourth aspect, wherein the control means changes the compression capacity of the compressor in a stepwise manner.

According to a sixth aspect of the present invention, when the compression capacity of the compressor in performing any one of the freezing room cooling operation and the refrigerating room cooling operation exceeds a predetermined upper reference capacity, While adjusting the operation duration ratio so that the duration of the cooling operation becomes longer, when the compression capacity of the compressor when performing any of the cooling operations falls below a predetermined lower reference capacity, 5. The cooling operation control device for a refrigerator according to claim 4, wherein the operation duration time ratio is adjusted so that the duration of the cooling operation is shortened.

According to a seventh aspect of the present invention, the control means is characterized in that the compressor has a minimum compression capacity when performing any of the cooling operations, and the internal temperature of the cooling side is a predetermined operation. When the internal temperature of the uncooled side has not yet reached the predetermined operation start temperature when the stop temperature is reached, the operation of the compressor is stopped, and after the compressor is stopped, the freezing room or the refrigerator is stopped. 5. The cooling operation control device for a refrigerator according to claim 4, wherein the cooling operation is restarted from the one in which the inside temperature of the chamber reaches the predetermined operation start temperature first.

According to the first, second and third aspects of the present invention, the refrigerant is circulated only through the refrigeration evaporator and the refrigeration compartment is driven by driving only the refrigeration fan, and the refrigeration is performed by driving only the refrigeration fan. The refrigerator is cooled by alternately switching the room cooling operation. Therefore, the freezing compartment and the refrigerating compartment can be cooled with appropriate refrigerating capacity, respectively, and the cooling efficiency can be improved. Further, since the refrigerating evaporator can be maintained at an appropriate temperature, it is possible to prevent frost formation on the evaporator and contribute to liquid compression.

According to the fourth aspect of the present invention, since the cooling capacity is adjusted based on the difference between the internal temperature and each upper limit temperature, the cooling efficiency can be further improved by a more appropriate cooling operation.

According to the fifth aspect of the present invention, since the compression capacity of the compressor is changed stepwise, the compressor can be driven while avoiding, for example, the resonance frequency of the entire refrigerator, thereby improving the quietness. Becomes possible.

According to the sixth aspect of the present invention, it is possible to prevent an extremely large load from being applied to the compressor, thereby improving the reliability of the compressor. Further, it is possible to further improve the cooling efficiency by avoiding the useless cooling operation.

According to the seventh aspect of the present invention, it is possible to avoid the useless cooling operation and to keep the inside of the refrigerator at a more appropriate temperature by the efficient cooling operation.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of the refrigerator of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view showing a refrigerator 10 of the present embodiment with a door opened. The cabinet 12 which is the main body of the refrigerator 10 has a refrigerator compartment 14 and a vegetable compartment 1 from the top.
6, a temperature switching room 18 and a freezing room 22 are provided. An ice making chamber 20 is provided on the left side of the temperature switching chamber 18. And the vegetable room 16, the temperature switching room 18, the ice making room 20
A heat insulating partition 24 is disposed between the two.

At the lower part of the refrigerator compartment 14, a chilled compartment 26 for maintaining the temperature inside the refrigerator at about 0 ° C. is provided. The vegetable compartment 16 is provided with a drawer-type vegetable compartment door (not shown), and the vegetable container 28 can be pulled out together with the door.
The temperature switching chamber 18 has a draw-out type temperature switching chamber door (not shown).
The temperature switching chamber container 30 can be pulled out together with the door. The freezer compartment 22 is also provided with a drawer-type freezer compartment door (not shown), with which the freezer container 32 can be pulled out. An ice making device 34 is provided near the ceiling of the ice making room 20, and an ice storage container 36 is provided below the ice making device 34. The tank 44 that supplies water to the ice making device 34 is provided on the left side of the chilled chamber 26.

Next, the structure and arrangement of the refrigeration cycle of the refrigerator 10 will be described with reference to FIG. 1, FIG. 2 which is a longitudinal sectional view of the refrigerator, and FIG. 3 which outlines the arrangement of the refrigeration cycle apparatus. . First, the compressor 46 is provided in a machine room 48 provided at the bottom of the cabinet 12, that is, at a lower rear portion of the freezing room 22. The refrigerator 10 has two evaporators, one for refrigeration and the other for freezing.
Is disposed behind the vegetable compartment 16, and the freezing evaporator 52 is provided at the upper rear portion of the freezing compartment 22. A refrigeration blower 54 is provided above the refrigeration evaporator 50, and a refrigeration blower 56 is provided above the refrigeration evaporator 52. A defrost heater 98 is provided below the freezing evaporator 52.
Is provided.

FIG. 4 is a diagram showing a refrigerant circuit provided in the refrigerator. Hereinafter, the flow of the refrigerant will be described with reference to FIG. The refrigerant flowing out of the compressor 46 is supplied to a muffler 58, a heat radiating pipe 60, a condenser 62, a dew proof pipe 64,
A three-way valve (flow path switching means) 68 passes through the dryer 66. In the three-way valve 68, the refrigerant flow path branches, one of which is directed to the refrigeration capillary tube (throttle device) 70, and the other is directed to the refrigeration capillary tube (throttle device) 72 provided in the refrigerant branch pipe 103. From the refrigeration capillary tube 70 to the above-mentioned refrigeration evaporator 50, it becomes one with the outlet side of the refrigeration capillary tube 72,
It reaches the above-mentioned freezing evaporator 52. Thereafter, the flow returns to the compressor 46 through the accumulator 74 and the suction pipe 76.

Further, the refrigerator has a freezer compartment temperature sensor 101 for detecting the inside temperature tF of the freezer compartment 22 and a refrigerator compartment temperature sensor 102 for detecting the inside temperature tR of the refrigerator compartment 14.
And an outside air temperature sensor 104 for detecting an outside air temperature tA, and a control unit (control means) for controlling a refrigeration cycle is configured using a microcomputer or the like. The control unit switches the three-way valve 68 to the refrigerating evaporator 50 side and drives the refrigerating blower 54 while stopping the refrigerating blower 56 to perform a refrigerating room cooling operation. Switching to the side of the branch pipe 103 and driving of the refrigerating blower 56 while stopping the refrigerating blower 54 perform a freezing room cooling operation. And the refrigerator compartment cooling operation is performed by the refrigerator compartment cooling time T.
Since the compressor 46 is operated at the refrigerating operation speed fR during the period R, the freezing room cooling operation is performed by operating the compressor 46 at the refrigerating operation speed fF during the freezing room cooling time TF. However, the control performed by the control unit at this time will be described below with reference to the flowchart of FIG.

In step S1, the time ratio between the freezing room cooling time TF and the refrigerating room cooling time TR is initially set. For example, when the outside air temperature tA is 30 ° C., the freezing room cooling time TF is set to 30 minutes, the refrigerator room cooling time TR is set to 15 minutes, and the time ratio is set to 2: 1.

Next, at step S2, the compression capacity of the compressor 46, that is, the operating speed is calculated using the outside air temperature tA. FIG. 6 shows a method of this calculation. First, the control section stores the correlation between the outside air temperature tA and the required refrigerating capacity for predetermined reference temperatures set for the freezing compartment 22 and the refrigerating compartment 14, respectively. Here, the reference temperature of the freezer compartment 22 is -18 ° C, and the reference temperature of the refrigerator compartment 14 is 3 ° C. And the outside air temperature sensor 104
, The cooling capacity required for the freezing room 22 and the refrigerating room 14 is grasped from the stored correlation. The controller stores the correlation between the operating speed of the compressor 46 and the refrigerating capacity for each evaporating temperature of the refrigerating evaporator 52 and the refrigerating evaporator 50. Then, from this correlation, the operating speed of the compressor 46 required for each cooling operation, that is, the freezing operating speed fF and the refrigeration operating speed fR are determined.

After the freezing room cooling time TF and the refrigerator room cooling time TR and the operating speeds fF and fR of the compressor 46 in each cooling operation are obtained in this way, the cooling operation is started in step S3. Here, the description will be continued assuming that the operation has been started from the freezing compartment cooling operation.

In step S4, the duration of the freezing room cooling operation started in step S3 and the freezing room cooling time TF
Compare with If the freezing room cooling time TF has not yet elapsed, this step S4 is repeated. on the other hand,
When the freezing room cooling time TF has elapsed since the start of the freezing room cooling operation, the process proceeds to step S5. This step S5
Then, the inside temperature of the uncooled side, that is, the refrigerator room temperature tR and the refrigerator room upper limit temperature tRu are compared. When the refrigerator compartment temperature tR is higher than the refrigerator compartment upper limit temperature tRu, the process proceeds to step S6, and when the refrigerator compartment temperature tR is lower than the refrigerator compartment upper limit temperature tRu, the process proceeds to step S7. Then, in step S6, the refrigeration operation speed fR is decreased, and in step S7, the refrigeration operation speed fR is increased. That is, the steps S6 and S7 adjust the refrigerating operation speed fR. Therefore, an adjustment method at this time will be described next with reference to a time chart of FIG.

In the freezing room cooling operation started by driving the compressor 46 at the freezing operation speed fF at time T0, the freezing room cooling time TF elapses at time T1. Therefore, at this time T1, the following equation fR2 = fR + α · (tR−tRu) (1) is calculated, and the adjusted refrigerating operation speed fR2 is obtained.
fR is the previously set refrigerating operation speed, and α is a constant. Therefore, the refrigerator compartment temperature tR becomes equal to the refrigerator compartment upper limit temperature tRu.
When the temperature is higher than the upper limit temperature tRu, the refrigeration operation speed fR increases by an amount proportional to the difference, and when the refrigerator temperature tR is lower than the upper limit temperature tRu, the refrigeration similarly increases. Operating speed fR decreases, and the refrigeration operating speed fR of the compressor 46 is adjusted.

The above description has been made on the assumption that the freezing compartment cooling operation is being performed. However, step S described later
In the routine after the operation is switched to the refrigerator compartment cooling operation in step 10, since the uncooled side is the freezer compartment 22 in step S5, the freezer compartment temperature tF is compared with the freezer compartment upper limit temperature tFu. The operation speed of the compressor 46 in this case is adjusted using the following equation: fF2 = fF + β · (tF−tFu) (2) fF2 is the refrigeration operation speed after adjustment, fF is the refrigeration operation speed set previously, and β is a constant.

Further, the operating rotational speeds fR2 and fF2 determined as described above are set in several steps (for example, 30, 38, 4) which are set to avoid resonance points of vibration and noise in the entire refrigerator.
(5 stages of 7, 59, 73 rps), and the operating speed of the compressor 46 is changed stepwise. The rotation speeds of the blowers 54 and 56 are also adjusted in accordance with the adjustment of the operation rotation speed of the compressor 46. Of course, when the operating rotation speed of the compressor 46 is increased, the rotation speed of the blowers 54 and 56 is increased, and when the operating rotation speed of the compressor 46 is reduced, the rotation speed of the blowers 54 and 56 is reduced. . The rotation speeds of the blowers 54 and 56 at this time are also changed stepwise at several stages (for example, three stages) of rotation speeds set to avoid resonance points of vibration and noise in the entire refrigerator. I have.

After the operating speed of the compressor 46 has been adjusted as described above, it is next determined in step S8 whether or not a condition for stopping the compressor 46 has been satisfied. This condition is that both the refrigerating operation speed fF and the refrigerating operation speed fR are equal to or lower than the minimum operation speed (accordingly, the compressor 4
6 is equal to or less than the minimum compression capacity), and the temperature inside the refrigerator (freezing room temperature tF in the above description) on the cooling side has reached its lower limit temperature (similarly, the freezing room lower limit temperature tFl). The temperature in the free side (refrigerator temperature tR in the above case)
Is established when the temperature has not yet reached the upper limit temperature (similarly, the refrigerator upper limit temperature tRu). If this condition is satisfied, the process proceeds to step S11 described below. If not, the process proceeds to step S9.

In step S9, when the compression capacity on the side to be cooled exceeds a predetermined upper compression capacity, or when the compression capacity falls below a predetermined lower compression capacity,
The time ratio between the freezer compartment cooling time TF and the refrigerator compartment cooling time TR is adjusted. That is, the refrigeration operation speed fR2 on the side to be cooled next becomes equal to the predetermined upper reference operation speed (for example, 6
0 rps), the refrigerating room cooling time TR is lengthened, but the refrigerating operation speed fR is further reduced in spite of the fact that it is a predetermined lower reference operation speed (for example, 30 rps). Is adjusted, the refrigerator compartment cooling time TR is shortened. The same applies to the freezing room cooling time TF. When the adjustment of the operation speed and the operation continuation time ratio is completed, the operation is switched from the freezer compartment cooling operation to the refrigerator compartment cooling operation or from the refrigerator compartment cooling operation to the freezer compartment cooling operation in step S10, and step S4 is performed. Return to

On the other hand, when the condition for stopping the compressor 46 is satisfied in step S8, the process proceeds to step S11 to stop the operation of the compressor 46. And step S1
In step 2, it is monitored whether any of the internal temperatures tF and tR has not reached the predetermined operation start temperature. That is, the refrigerator compartment temperature tR is not higher than the refrigerator compartment upper limit temperature tRu, and the freezer compartment temperature tF is the freezer compartment upper limit temperature tFu.
It is to monitor whether it is higher than that. First, the refrigerator compartment temperature tR is changed to the refrigerator compartment upper limit temperature tRu.
If it is higher than the above, the process proceeds to step S13 to start the refrigerator compartment cooling operation, and returns to step S4. on the other hand,
When the freezing room temperature tF becomes higher than the freezing room upper limit temperature tFu first, the process proceeds to step S14 to start the freezing room cooling operation, and returns to step S4.

In the refrigerator configured and controlled as described above, the entire refrigerator is cooled by alternately performing the freezing room cooling operation and the refrigerator room cooling operation. Therefore, when cooling the refrigerating compartment at a relatively high temperature, the refrigerating cycle can be operated at a high evaporating temperature, whereby the cooling efficiency can be improved. Liquid compression can be avoided. At this time, the operation duration ratio and the compressor 4
The operating rotational speeds fF and fR of No. 6 are set based on the required refrigerating capacity (heat leak) grasped using the outside air temperature tA. Therefore, by performing an appropriate operation according to the use state of the refrigerator, the cooling efficiency can be further improved.

The cooling operation is performed by setting the freezing room cooling time TF and the refrigerator compartment cooling time TR in advance. Therefore, the freezing room cooling operation and the refrigerating room cooling operation are not switched at short intervals, for example, every 10 minutes, and the three-way valve 68, the rotation speed of the blowers 54 and 56, the compressor 4
6 can be prevented from frequently changing, and the reliability of the element parts can be improved.

When switching the cooling operation, the compressor 4
6, the rotational speeds fF and fR and the rotational speeds of the blowers 54 and 56 are adjusted. Therefore, the load of food etc.
Even when it is thrown into 4, 22, an appropriate cooling operation corresponding to it can be performed. At this time, the operating rotational speeds fF and fR of the compressor 46 and the blowers 54 and 56
Is gradually changed so as not to coincide with the vibration resonance point of the entire refrigerator. Therefore, it is possible to reliably prevent the silence from being impaired.

In the refrigerator, when the operating speeds fF and fR of the compressor 46 become equal to or higher than a predetermined upper reference speed, the operation continuation time ratio between the freezing room cooling operation and the refrigerator room cooling operation is adjusted. ing. Therefore, the compressor 46
It is avoided that the operation is continued with a large load applied to the device, so that the reliability of the device can be further improved. Further, the time ratio is adjusted also when the operation speed becomes equal to or lower than a predetermined lower reference speed. Therefore, useless cooling operation can be prevented, and the cooling efficiency can be further improved.

Further, for example, under a low load condition where the environmental temperature is 15 ° C. or less and the door is not opened and closed, the heat leak is very small. The capacity may be excessive. In such a refrigerator, the compressor 46 is stopped in such a case, so that useless cooling operation is reliably avoided. Then, when the compressor 46 is stopped, the cooling operation is performed from the side where the temperatures tF and tR reach the upper limit temperatures tFu and tRu first. Therefore, the temperatures tF and tR in the refrigerator can be reliably maintained at an appropriate low temperature.

[0039]

As described above, according to the first aspect of the present invention, the freezing room cooling operation performed by driving only the refrigeration fan and the refrigeration room cooling operation performed by driving only the refrigeration fan are alternately switched. Cooling the refrigerator. Therefore, the freezing compartment and the refrigerating compartment can be cooled with appropriate refrigerating capacity, respectively, and the cooling efficiency can be improved. Further, since the refrigerating evaporator can be maintained at an appropriate temperature, it is possible to prevent frost formation on the evaporator and contribute to liquid compression.

According to the second aspect of the present invention, the cooling capacity is adjusted based on the difference between the internal temperature and each upper limit temperature.
Cooling efficiency can be further improved by a more appropriate cooling operation.

Further, according to the third aspect of the invention, since the compression capacity of the compressor is changed stepwise, the compressor can be driven while avoiding the resonance frequency of the entire refrigerator, for example.
It is possible to improve quietness.

According to the fourth aspect of the present invention, it is possible to prevent an extremely large load from being applied to the compressor, thereby improving the reliability of the compressor. In addition, it is possible to further improve the cooling efficiency by avoiding unnecessary cooling operation.

According to the fifth aspect of the present invention, the inside of the refrigerator can be maintained at a more appropriate temperature by an efficient cooling operation avoiding useless cooling operation.

[Brief description of the drawings]

FIG. 1 is a front view showing the inside of a cabinet of a refrigerator according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the refrigerator.

FIG. 3 is an arrangement diagram of each device constituting a refrigeration cycle of the refrigerator.

FIG. 4 is a refrigerant circuit diagram of the refrigerator.

FIG. 5 is a flowchart illustrating control performed by a control unit.

FIG. 6 is a graph illustrating control performed by a control unit.

FIG. 7 is a time chart illustrating the above control.

[Explanation of symbols]

 14 Refrigeration Room 22 Refrigeration Room 46 Compressor 50 Refrigeration Evaporator 52 Refrigeration Evaporator 54 Refrigeration Blower 56 Refrigeration Blower 62 Condenser 70 Refrigeration Capillary Tube 72 Refrigeration Capillary Tube 101 Freezing Room Temperature Sensor 102 Refrigeration Room Temperature Sensor 104 Outside air temperature sensor

Claims (7)

[Claims] 1. A compressor, a condenser, a refrigerating expansion device,
A refrigeration evaporator provided with a refrigeration blower and a refrigeration evaporator provided with a refrigeration blower are sequentially connected in a ring shape, and have a refrigerant branch pipe branched from between the condenser and the refrigeration expansion device. The refrigerant branch pipe is provided with a refrigeration throttle device, and the downstream side of the refrigerant branch pipe is connected between the refrigeration evaporator and the refrigeration evaporator. A refrigerant circuit provided with a flow path switching means for switching between the cooling device side and the refrigerant branch pipe side, switching the flow path switching means to the refrigeration evaporator side and driving the refrigeration blower while stopping the refrigeration blower. Refrigeration room cooling operation performed by switching the flow path switching means to the refrigerant branch pipe side and driving the refrigeration blower while stopping the refrigeration blower by alternately switching at a time ratio. Characterized by Refrigerator cooling operation control device. 2. A compressor having a variable capacity, a condenser, a refrigerating expansion device, a refrigerating evaporator provided with a refrigerating blower, and a refrigerating evaporator provided with a refrigerating blower are sequentially connected in a ring shape. And a refrigerant branch pipe branched from between the condenser and the refrigeration throttle device. The refrigerant branch pipe is provided with a refrigeration throttle device, and a downstream side of the refrigerant branch pipe is provided with a refrigeration evaporator and a refrigeration evaporator. And a refrigerant circuit provided with flow path switching means for switching the refrigerant from the condenser between the refrigeration evaporator side and the refrigerant branch pipe side, wherein the flow path switching means is provided on the refrigeration evaporator side. Compressor function when performing each cooling operation by switching the cooling chamber driving operation to drive the refrigeration blower and switching the flow path switching means to the refrigerant branch pipe side to drive the refrigeration fan by the respective reference temperature and outside air temperature. And the operation duration between both cooling operations Set, refrigerator cooling operation control apparatus characterized by being made to perform alternately and refrigerating compartment cooling operation and the freezing compartment cooling operation. 3. A refrigerator having a refrigerating compartment and a freezing compartment, a compressor having a variable capacity, a condenser, a refrigerating expansion device, a refrigerating evaporator having a refrigerating blower, and a refrigerating blower. A refrigerant evaporator is sequentially connected in a ring shape. The refrigerant evaporator further includes a refrigerant branch pipe branched from between the condenser and the refrigeration expansion device. Side is connected between the refrigerating evaporator and the refrigerating evaporator, and further provided is a flow path switching means for switching the distribution destination of the refrigerant flowing out of the condenser between the refrigerating evaporator side and the refrigerant branch pipe side. A refrigerant circuit, switching the flow path switching means to the refrigeration evaporator side and driving the refrigeration blower while stopping the refrigeration blower, and switching the flow path switching means to the refrigerant branch pipe side To drive the refrigeration blower together with A cooling operation control device for a refrigerator that alternately switches between a freezing room cooling operation performed by stopping a refrigerating blower and a refrigerator room temperature sensor for detecting a temperature in the refrigerator room, and a refrigerator room temperature sensor for detecting a temperature in the refrigerator room. A freezer compartment temperature sensor for detecting a temperature, an outside air temperature sensor for detecting an outside air temperature, and control means, wherein the control means includes a predetermined reference temperature set for each of the freezer compartment cooling operation and the refrigerator compartment cooling operation. Based on the compression capacity of the compressor and the operation duration ratio between the two cooling operations when performing each of the cooling operations using the outside air temperature, and based on the obtained compression capacity and operation duration ratio, A refrigerator cooling operation control device characterized in that a freezer compartment cooling operation and a refrigerator compartment cooling operation are alternately performed. 4. The compressor according to claim 1, wherein said control means is configured to control the compressor based on a difference between a temperature inside the freezer compartment and a predetermined upper limit temperature of the freezer compartment and a difference between a temperature inside the refrigerator and a predetermined upper limit temperature of the refrigerator compartment. 4. The cooling operation control device for a refrigerator according to claim 3, wherein adjustment of the compression capacity and adjustment of the rotation speed of each of the blowers are performed. 5. The cooling operation control device for a refrigerator according to claim 4, wherein the control means changes the compression capacity of the compressor in a stepwise manner. 6. When the compression capacity of the compressor during one of the freezing compartment cooling operation and the refrigerator compartment cooling operation exceeds a predetermined upper reference capacity, the control means controls the cooling operation. While adjusting the operation duration ratio so that the duration becomes longer, when the compression capacity of the compressor during any of the cooling operations falls below a predetermined lower reference capacity, the duration of the cooling operation The cooling operation control device for a refrigerator according to claim 4, wherein the operation continuation time ratio is adjusted so as to shorten the operation time ratio. 7. The control means according to claim 1, wherein each of the compressors has a minimum compression capacity when performing a cooling operation, and the temperature in the refrigerator on the cooling side has reached a predetermined operation stop temperature. When the inside temperature of the uncooled side has not yet reached the predetermined operation start temperature, the operation of the compressor is stopped, and after the compressor is stopped, the inside of the freezer compartment or the refrigerator compartment inside the compartment is stopped. The cooling operation control device for a refrigerator according to claim 4, wherein the cooling operation is restarted when the temperature first reaches the predetermined operation start temperature.