JP2010025484A - Cooling storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling storage capable of preventing degradation of quality of a stored object in a cooling compartment by preventing a temperature in the cooling compartment from excessively rising. <P>SOLUTION: In the cooling storage, the inside of the cooling compartment 5 is cooled by supplying a refrigerant compressed by a compressor 12 and liquefied by a condenser 13, to a cooler 6. A refrigerant inlet 6a of the cooler 6 is connected to a refrigerant outlet 12b side of the compressor 12 through the solenoid valve 15, and a refrigerant outlet 6b of the cooler 6 is connected to a refrigerant inlet 12a side of the compressor 12. When a detection temperature of a temperature sensor 18 disposed in the cooling compartment 5 reaches an ON temperature value Dn or more, the compressor 12 is operated, and further the solenoid valve 15 is switched on when a standby time Lt has passed from a starting time of the operation of the compressor 12. When the detection temperature D of the temperature sensor 18 reaches an OFF temperature value Df or less thereafter, the solenoid valve 15 is switched off and the compressor 12 is stopped. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a refrigerator in which a cooling chamber is cooled by supplying a vaporized refrigerant, which is compressed by the operation of a compressor and liquefied by a condenser, to a cooler disposed in the cooling chamber.

  For example, Patent Document 1 is known as this type of refrigerator. In the refrigerator of Patent Document 1, the refrigerant inlet of the cooler is connected to the refrigerant outlet side of the compressor via an electromagnetic valve, and the electromagnetic valve is turned on (opened) in conjunction with the operation of the compressor. Then, the refrigerant compressed by the compressor and liquefied by the condenser is supplied to the cooler, and the cooling chamber is cooled. When the temperature of the cooling chamber decreases to a predetermined temperature, the compressor stops, and the solenoid valve is turned off (closed) in conjunction with the stop, whereby the supply of refrigerant to the cooler is stopped.

JP-A-53-97663 (FIG. 1)

  In the refrigerator of Patent Document 1, since the solenoid valve is turned on in conjunction with the operation of the compressor, the high-temperature and high-pressure refrigerant gas generated immediately after the start of the compressor operation flows into the cooler via the solenoid valve. . For this reason, the cooler is warmed by the refrigerant gas, and thereby the temperature in the cooling chamber rises excessively. As a result, for example, when the cooling room is a freezing room, the stored material stored in the freezing room is inadvertently thawed, resulting in deterioration of the quality of the stored material.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to prevent an excessive increase in the temperature in the cooling chamber and prevent deterioration in the quality of stored items in the cooling chamber. .

The refrigerator according to the present invention includes a cooling chamber 5 and a cooler 6 disposed in the cooling chamber 5, and the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 is supplied to the cooler 6. As a result, the inside of the cooling chamber 5 is cooled. The refrigerant inlet 6a of the cooler 6 is connected to the refrigerant outlet 12b side of the compressor 12 via the solenoid valve 15, and the refrigerant outlet 6b of the cooler 6 is connected to the refrigerant inlet 12a side of the compressor 12, The cooling chamber 5 is provided with a temperature sensor 18 for detecting the temperature in the cooling chamber 5, and the detected temperature D of the temperature sensor 18 is not less than a predetermined on-temperature value Dn when the compressor 12 is stopped. Then, the compressor 12 is operated, and then the compressor 12 is stopped when the detected temperature D of the temperature sensor 18 becomes equal to or lower than a predetermined off-temperature value Df.
The refrigerator is turned on when the electromagnetic valve 15 is turned off when a predetermined waiting time Lt has elapsed from the start time of the operation of the compressor 12, and thereafter the detected temperature D of the temperature sensor 18 is turned off. It is characterized by being turned off when it becomes Df or less.

The refrigerator according to the present invention includes a plurality of cooling chambers 51 and 52, and coolers 61 and 62 disposed in the cooling chambers 51 and 52, respectively. By supplying the refrigerant that has been compressed and liquefied by the condenser 13, the inside of each of the cooling chambers 51 and 52 is cooled. The refrigerant inlets 61a and 62a of the respective coolers 61 and 62 are connected to the refrigerant outlet 12b side of the compressor 12 via the electromagnetic valves 151 and 152, respectively, and the refrigerant outlets 61b and 62b of the respective coolers 61 and 62 are compressed. The temperature sensors 181 and 182 for detecting the temperatures in the cooling chambers 51 and 52 are arranged in the cooling chambers 51 and 52, respectively. Any one of the detected temperatures D1 and D2 of the cooling chambers 51 and 52 detected by the temperature sensors 181 and 182 in a state where the engine is stopped is a predetermined on-temperature Dn1 and Dn2 set for each cooling chamber 51 and 52. If it becomes above, the compressor 12 will operate | move.
Then, when a predetermined waiting time Lt has elapsed from the start time of the operation of the compressor 12, the electromagnetic valves 151 corresponding to the cooling chambers 51 and 52 in which the detected temperatures D1 and D2 become the on-temperature values Dn1 and Dn2 or more. When 152 is turned on from off and then the detected temperatures D1 and D2 of the cooling chambers 51 and 52 are equal to or lower than the predetermined off temperatures Df1 and Df2 set for the respective cooling chambers 51 and 52, the off temperature Df1 The electromagnetic valves 151 and 152 corresponding to the cooling chambers 51 and 52 that are equal to or lower than Df2 are turned off from on, and the compressor 12 is stopped when all the electromagnetic valves 151 and 152 are turned off. The same applies to the case where there are three or more cooling chambers.

  In the refrigerator according to the present invention, when the detected temperature D of the temperature sensor 18 is equal to or higher than the ON temperature value Dn while the compressor 12 is stopped, the compressor 12 is activated. When the standby time Lt elapses from the operation start time of the compressor 12, the solenoid valve 15 is turned on from off. Thus, the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 starts to be supplied to the cooler 6 through the electromagnetic valve 15, and the inside of the cooling chamber 5 is cooled by the heat of vaporization of the refrigerant. When the temperature in the cooling chamber 5 decreases due to the cooling and the detected temperature D of the temperature sensor 18 becomes equal to or lower than the off temperature value Df, the electromagnetic valve 15 is turned off and the compressor 12 is stopped.

  According to this, since the solenoid valve 15 is off immediately after the start of the operation of the compressor 12, it is possible to reliably prevent the high-temperature and high-pressure refrigerant gas generated immediately after the start of the operation of the compressor 12 from flowing into the cooler 6. Therefore, it is possible to prevent the cooler 6 from being warmed by the refrigerant gas, and to prevent the temperature in the cooling chamber 5 from rising excessively. For example, stored items stored frozen in the freezing chamber 52 as the cooling chamber 5. Can be prevented from being inadvertently thawed and deteriorating the quality of the stock. That is, according to the present invention, it is possible to effectively prevent the stored item from being inadvertently warmed and the quality of the stored item to deteriorate, and it is possible to obtain a highly reliable refrigerator.

  The same applies to the case where the refrigerator has two or more cooling chambers 5. That is, when any of the detected temperatures D1 and D2 of the temperature sensors 181 and 181 of the cooling chambers 51 and 52 becomes equal to or higher than the on-temperature value Dn1 and Dn2 while the compressor 12 is stopped, the compressor 12 is activated. To do. When the standby time Lt elapses from the start time of the operation of the compressor 12, the solenoid valves 151 and 152 for the cooling chambers 51 and 52 having the ON temperature values Dn1 and Dn2 or more are turned on. Thus, the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 starts to be supplied to the coolers 61 and 62 via the electromagnetic valves 151 and 152 which are turned on, and the on-temperature value is determined by the heat of vaporization of the refrigerant. The insides of the cooling chambers 51 and 52 that have become Dn1 and Dn2 or more are cooled. Then, when the temperature in the cooling chambers 51 and 52 decreases and the detected temperatures D1 and D2 of the temperature sensors 181 and 182 of the cooling chambers 51 and 52 become equal to or lower than the off-temperature values Df1 and Df2, the off-temperature Df1 The solenoid valves 151 and 152 for the cooling chambers 51 and 52 that have become Df2 or less are turned off. When all the solenoid valves 151 and 152 are turned off, the compressor 12 stops.

  That is, according to the present invention, since both the solenoid valves 151 and 152 are off immediately after the start of the operation of the compressor 12, the high-temperature and high-pressure refrigerant gas generated immediately after the start of the operation of the compressor 12 is supplied to the coolers 61 and 62. There is no inflow. As a result, the coolers 61 and 62 are warmed by the refrigerant gas, and the temperature in the cooling chambers 51 and 52 rises excessively. For example, stored items that are stored frozen are inadvertently thawed, It is possible to reliably prevent the quality from deteriorating. In other words, it is possible to effectively prevent the stored items in the cooling chambers 51 and 52 from being inadvertently heated and deteriorating the quality of the stored items.

  An embodiment of a refrigerator according to the present invention will be described with reference to FIGS. In FIG. 2, the cooler includes a case main body 1 with a heat insulating structure whose front surface is open, a partition wall 2 with a heat insulating structure that partitions the internal space of the case main body 1 up and down, and a machine room disposed below the case main body 1. 3 is provided. In the case body 1, a refrigerating chamber 51 serving as the cooling chamber 5 is configured above the partition wall 2, and a freezing chamber 52 serving as the cooling chamber 5 is configured below the partition wall 2.

  In the refrigerator compartment 51 and the freezer compartment 52, coolers 61 and 62 as the cooler 6 are respectively arranged. The cooler 61 of the refrigerator compartment 51 is arranged at the upper end portion in the duct 4 arranged at the rear part of the refrigerator compartment 51. The cold air in the refrigerator compartment 51 sucked into the duct 4 by the fan 8 disposed in the upper opening of the duct 4 is cooled by the cooler 61 and then blown out into the refrigerator compartment 51 from the lower opening of the duct 4. The The cooler 62 of the freezer compartment 52 is formed in a panel shape and disposed on the inner wall of the freezer compartment 52. The inside of the refrigerator compartment 51 is cooled to 3 ° C., for example, and the inside of the freezer compartment 52 is cooled to −30 ° C., for example. Each front opening of the refrigerator compartment 51 and the freezer compartment 52 is opened and closed by the doors 10 and 11 having a heat insulating structure.

  A refrigeration mechanism 7 shown in FIG. 1 and FIG. 2 is arranged in the machine room 3, and the refrigeration mechanism 7 includes a single compressor 12 and a single condenser 13. The refrigerant inlets 61a and 62a of the respective coolers 61 and 62 are connected to the refrigerant outlet 13b of the condenser 13 via the expansion valves 141 and 142 as the expansion valves 14 and the electromagnetic valves 151 and 152 as the electromagnetic valves 15, respectively. Then, the refrigerant inlet 13 a of the condenser 13 is connected to the refrigerant outlet 12 b of the compressor 12. That is, the refrigerant inlets 61 a and 62 a side of the coolers 61 and 62 are connected to the refrigerant outlet 12 b side of the same compressor 12 through the same condenser 13, respectively. In addition, the refrigerant outlet 61b of the cooler 61 in the refrigerator compartment 51 is connected to the refrigerant inlet 12a of the compressor 12 via the capillary tube 20, and the refrigerant outlet 62b of the cooler 62 in the freezer compartment 52 is connected to the check valve 21. To the refrigerant inlet 12 a of the compressor 12. That is, the refrigerant outlets 61b and 62b of the respective coolers 61 and 62 are connected to the refrigerant inlet 12a side of the compressor 12, respectively.

  A heater 16 is disposed in the refrigerator compartment 51 so as to face the cooler 7, and the heater 16 is used for defrosting the cooler 61 in the refrigerator compartment 51. In the refrigerating room 51 and the freezing room 52, temperature sensors 181 and 182 as temperature sensors 18 for detecting the temperature in the respective rooms 51 and 52 are arranged. The condenser 13 is cooled by the air blown by the fan 17.

  In the refrigerator, on and off of the electromagnetic valves 151 and 152 are controlled based on the detected temperatures of the temperature sensors 181 and 182 so that the chambers 51 and 52 are within a predetermined temperature range, and the compressor 12 A control unit 23 is provided for controlling the operation and stop of the motor. The control unit 23 operates the compressor 12 when at least one of the electromagnetic valves 151 and 152 is on (opened), and turns off the compressor 12 when both the electromagnetic valves 151 and 152 are off (closed). Stop. When the electromagnetic valve 151 for the refrigerator compartment is turned on, the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 is supplied to the refrigerator 61 for the refrigerator compartment, and the inside of the refrigerator compartment 51 is cooled by the heat of vaporization of the refrigerant. Is done. Also, when the freezer compartment solenoid valve 152 is turned on, the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 is supplied to the freezer compartment cooler 62, and the heat of vaporization of the refrigerant causes the inside of the freezer compartment 52. Is cooled.

  Next, operation | movement of the refrigerator of this invention is demonstrated using the flowchart of FIG. 3, and the timing chart of FIG. The control unit 23 incorporates a timer 24 (FIG. 1) for timekeeping, and the timer 24 is reset at the start of execution of the flowchart of FIG. 3 (hereinafter referred to as this flowchart). At the start of execution of this flowchart, both the solenoid valves 151 and 152 are turned off and the compressor 12 is stopped. As a result, the temperature of the refrigerator compartment 51 and the freezer compartment 52 rises. It is assumed that it is in a state.

  First, the controller 23 detects a temperature D1 detected by the temperature sensor 181 in the refrigerating chamber 51 equal to or higher than a predetermined refrigeration on-temperature value Dn1 (for example, 7 ° C.) or a temperature detected by the temperature sensor 182 in the freezer compartment 52. Is determined to be equal to or higher than a predetermined freezing on-temperature value Dn2 (for example, −28 ° C.) (S1, S2). For example, when the detected temperature D2 of the freezer compartment 52 is lower than the on-temperature value Dn2 for freezing (NO in S2) and the detected temperature D1 of the refrigerating chamber 51 becomes equal to or higher than the on-temperature value Dn1 for freezer (S1 YES: Time t1), the control unit 23 starts the operation of the compressor 12 (S3), and starts counting by the timer 24 (S4).

  When the time T measured by the timer 24 exceeds a predetermined standby time Lt (for example, 60 seconds) set in advance (YES in S5: time t2), the control unit 23 controls the refrigerator 51 as described above. Since the detected temperature D1 is equal to or higher than the refrigeration on-temperature value Dn1 (YES in S6), the refrigeration room electromagnetic valve 151 is turned on (S7). Thus, the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 is supplied to the refrigerator 61 for the refrigerator compartment, and the inside of the refrigerator compartment 51 is cooled by the heat of vaporization of the refrigerant. Here, it is described that the detected temperature D2 of the freezer compartment 52 is lower than the on-temperature value Dn2 for freezing, and the electromagnetic valve 152 for the freezer compartment is off.

  Thereafter, when the detected temperature D1 of the refrigerating room 51 becomes equal to or lower than a predetermined refrigerating off temperature value Df1 (eg, 3 ° C.) (YES in S10), the control unit 23 sets the refrigerating room electromagnetic valve 151. Is turned off (S11: time t3). Since the freezer electromagnetic valve 152 is off as described above, all the electromagnetic valves 151 and 152 are turned off (YES in S14), and the control unit 23 stops the compressor 12 (S15), The timer 24 is reset (S16). Next, the control unit 23 returns to S1 and repeats the processes after S1.

  Further, for example, when the detected temperature D1 of the refrigerating chamber 51 is lower than the refrigeration on-temperature value Dn1 (NO in S1) and the detected temperature D2 of the freezer compartment 52 becomes equal to or higher than the refrigeration on-temperature value Dn2. (S2: YES: time t4), the control unit 23 operates the compressor 12 and starts measuring time by the timer 24 (S3, S4).

  When the standby time Lt has elapsed (YES in S5), the control unit 23 determines that the detected temperature D2 of the freezer compartment 52 is equal to or higher than the freezing on-temperature value Dn2 as described above (YES in S8). The freezer electromagnetic valve 152 is turned on (S9: time t5). Thus, the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 is supplied to the cooler 62 for the freezer compartment, and the inside of the freezer compartment 52 is cooled by the heat of vaporization of the refrigerant. Here, it is described that the detected temperature D1 of the refrigerating chamber 51 is lower than the on-temperature value Dn1 for refrigerating, and the electromagnetic valve 151 for refrigerating chamber is turned off.

  Thereafter, when the detected temperature D2 of the freezer compartment 52 is equal to or lower than a predetermined freezing off temperature value Df2 (for example, −31 ° C.) set in advance (YES in S12), the control unit 23 controls the electromagnetic valve for the freezer compartment. 152 is turned off (S13: time t6). At this time, as described above, since the solenoid valve 151 for the refrigerator compartment is off, all the solenoid valves 151 and 152 are turned off (YES in S14), the control unit 23 stops the compressor 12, and The timer 24 is reset (S15, S16). Next, the control unit 23 returns to S1 and repeats the processes after S1.

  As described above, in the present invention, the temperature of the refrigerator compartment 51 and the freezer compartment 52 rises in a state where all the solenoid valves 151 and 152 are off and the compressor 12 is stopped. Even if one of the detected temperatures D1 and D2 of the freezer compartment 52 becomes the on temperature value Dn1 and Dn2 or more and the compressor 12 is activated, the standby time Lt is reduced from the time (time t1, t4) when the operation is started. Until the time has elapsed, the solenoid valves 151 and 152 are not turned on.

  This prevents the high-temperature and high-pressure refrigerant gas generated immediately after the start of the operation of the compressor 12 from flowing into the coolers 61 and 62. Accordingly, the coolers 61 and 62 are warmed by the refrigerant gas, and the temperatures in the refrigerator compartment 51 and the freezer compartment 52 are excessively increased. For example, stored items stored frozen in the freezer compartment 52 are inadvertently thawed. Thus, it is possible to reliably prevent the quality of stored items from deteriorating.

  The present invention can be applied even when only one cooling chamber 5 is used, or when only one of the plurality of cooling chambers 5 is used. For example, a case where only one chamber is used as the cooling chamber 5 will be described. The control unit 23 sets the temperature D detected by the temperature sensor 18 in a state where the compressor 12 is stopped in advance. When the temperature becomes equal to or higher than the predetermined on-temperature value Dn, the compressor 12 is operated and the time measurement by the timer 24 is started.

  When the time T of the timer 24 has passed the standby time Lt, the control unit 23 turns on the cooling chamber electromagnetic valve 15 from OFF. Thus, the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 is supplied toward the refrigerant inlet 6a side of the cooler 6, and the inside of the freezer compartment 52 is cooled by the heat of vaporization of the refrigerant. The vaporized refrigerant is discharged from the refrigerant outlet 6 b of the cooler 6 and returns to the compressor 12. Thereafter, when the detected temperature D of the cooling chamber 5 becomes equal to or lower than a predetermined off temperature value Df set in advance, the control unit 23 turns off the electromagnetic valve 15 and stops the compressor 12 and resets the timer 24. To do.

  That is, also in this case, the temperature in the cooling chamber 5 rises while the compressor 12 is stopped, and the detected temperature D becomes equal to or higher than the ON temperature value Dn. The electromagnetic valve 15 is not turned on until the standby time Lt elapses from the time when the operation starts. As a result, the high-temperature and high-pressure refrigerant gas generated immediately after the start of the operation of the compressor 12 flows into the cooler 6, and the cooler 6 is warmed by the refrigerant gas to reliably prevent the quality of stored items from deteriorating. can do.

  The present invention can be applied even when there are three or more cooling chambers 5. Also in this case, the control unit 23 determines whether any one of the detected temperatures D of the temperature sensors 25 arranged in each cooling chamber 5 in a state where the compressor 12 is stopped is set in advance for each cooling chamber 5. When the temperature becomes equal to or higher than the ON temperature value Dn, the compressor 12 is operated and the timer 24 starts measuring time. Then, when the standby time Lt elapses, the control unit 23 turns on the cooling chamber electromagnetic valve 15 that is equal to or higher than the on-temperature value Dn. Thereafter, when the detected temperature D of the cooling chamber 5 becomes equal to or lower than a predetermined off temperature value Df set in advance, the electromagnetic valve 15 for the cooling chamber that has become equal to or lower than the off temperature value Df is turned off. Then, when all the solenoid valves 15 are turned off, the compressor 12 stops.

  If the detected temperature D of the plurality of temperature sensors 25 becomes equal to or higher than the ON temperature value Dn within the standby time Lt, the cooling chamber solenoid valve becomes equal to or higher than the ON temperature value Dn when the standby time Lt elapses. 15 will be turned on.

It is a block block diagram which shows the refrigerator which concerns on this invention. It is a schematic longitudinal cross-sectional view which shows schematic structure of the refrigerator which concerns on this invention. It is a flowchart which shows operation | movement of the control part which concerns on this invention. It is a timing chart which shows operation | movement of the control part which concerns on this invention.

Explanation of symbols

5 Cooling chamber 6, 61, 62 Cooler 6a, 61a, 62a Coolant refrigerant inlet 6b, 61b, 62b Cooler refrigerant outlet 12 Compressor 12a Compressor refrigerant inlet 12b Compressor refrigerant outlet 13 Condenser 15, 151/152 Solenoid valve 18/181/182 Temperature sensor 23 Control unit 51 Refrigerating room 52 Freezing room

Claims (2)

It has a cooling chamber (5) and a cooler (6) arranged in the cooling chamber (5), and is compressed by the compressor (12) into the cooler (6) and liquefied by the condenser (13). In the cooling chamber in which the inside of the cooling chamber (5) is cooled by being supplied with the refrigerant,
The refrigerant inlet (6a) of the cooler (6) is connected to the refrigerant outlet (12b) side of the compressor (12) via the electromagnetic valve (15), and the refrigerant outlet (6b) of the cooler (6) Connected to the refrigerant inlet (12a) side of the compressor (12),
In the cooling chamber (5), a temperature sensor (18) for detecting the temperature in the cooling chamber (5) is disposed,
When the detected temperature (D) of the temperature sensor (18) is equal to or higher than a predetermined on-temperature value (Dn) in a state where the compressor (12) is stopped, the compressor (12) is operated, and then the temperature sensor ( When the detected temperature (D) of 18) is equal to or lower than a predetermined off-temperature value (Df), the compressor (12) is stopped.
The solenoid valve (15) turns from off to on when a predetermined waiting time (Lt) has elapsed from the start time of operation of the compressor (12), and then the detected temperature (D) of the temperature sensor (18) A refrigerator characterized by being turned off when the temperature is equal to or lower than an off temperature value (Df). A plurality of cooling chambers (51, 52) and coolers (61, 62) disposed in the respective cooling chambers (51, 52) are provided, and compressors (12) are provided in these coolers (61, 62). In the cooler in which the inside of each cooling chamber (51, 52) is cooled by supplying the refrigerant compressed in the condenser and liquefied by the condenser (13), each cooler (61, 62) ) Refrigerant inlets (61a and 62a) are connected to the refrigerant outlet (12b) side of the compressor (12) via solenoid valves (151 and 152), respectively, and the refrigerant outlets (61 and 62) of the refrigerant (61 and 62) 61b and 62b) are connected to the refrigerant inlet (12a) side of the compressor (12),
In each cooling chamber (51, 52), a temperature sensor (181, 182) for detecting the temperature in the cooling chamber (51, 52) is arranged, respectively.
One of the detected temperatures (D1 and D2) of the cooling chambers (51 and 52) detected by the temperature sensors (181 and 182) in a state where the compressor (12) is stopped is the cooling chamber (51 and 52). ) When the temperature becomes equal to or higher than a predetermined on-temperature (Dn1 · Dn2) set every time, the compressor (12) is activated.
When a predetermined waiting time (Lt) has elapsed from the start time of the operation of the compressor (12), the cooling chamber (51.multidot.51.multidot.D1) becomes equal to or higher than the detected temperature (D1.multidot.Dn2). 52) the solenoid valves (151 and 152) corresponding to 52) are turned on from OFF, and then the detected temperatures (D1 and D2) of the cooling chambers (51 and 52) are set for each cooling chamber (51 and 52). The electromagnetic valves (151 and 152) corresponding to the cooling chambers (51 and 52) that are lower than or equal to the off temperature (Df1 and Df2) are turned off from on when the predetermined off temperature (Df1 and Df2) is reached.
The refrigerator characterized by stopping the compressor (12) when all the solenoid valves (151, 152) are turned off.

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