JP2010025485A - Refrigerator-freezer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator-freezer capable of elongating service life of a heater and a relay for switching operation and stop of the heater while preventing the inside of a refrigerating compartment from being excessively cooled. <P>SOLUTION: In the refrigerator-freezer, refrigerant inlets 7a, 9a of coolers 7, 9 of the refrigerating compartment 5 and a freezing compartment 6 are respectively connected to a refrigerant outlet 12b side of the same compressor 12 through solenoid valves 15, 19. Temperature sensors 25, 26 are respectively disposed in the refrigerating compartment 5 and the freezing compartment 6, and a control section 23 controls on/off of the solenoid valves 15, 19, and controls an operation of a heat-retention heater 22. The control section 23 starts measurement of time when a detection temperature DR of the refrigerating compartment 5 becomes a heater-on temperature value DHn or less in a state that the solenoid valve 15 for the refrigerating compartment is off and the solenoid valve 19 for the freezing compartment is on, and operates the heat retention heater 22 when the detection temperature DR of the refrigerating compartment 5 is the heater-on temperature value DHn or less when a measured time T is over a standby time Ht. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a refrigerator-freezer that includes a refrigerator compartment and a freezer compartment and that cools the refrigerator compartment and the refrigerator compartment using a single compressor and condenser.

  As this kind of refrigerator-freezer, what is shown, for example in patent documents 1 and 2 is mentioned. In the refrigerator-freezer of patent document 1 and 2, the refrigerator compartment and the freezer compartment are formed by partitioning the interior with a partition wall. A cooler is disposed in each of the refrigerator compartment and the freezer compartment, and after the refrigerant is compressed by the compressor and liquefied by the condenser, the refrigerant is sent to the cooler in each room and vaporized. As a result, each room is cooled. The refrigerant discharged from the refrigerant outlet of each cooler returns to the compressor.

  Moreover, in the refrigerator-freezer of patent document 1, the temperature sensor is each arrange | positioned in each room | chamber interior of a refrigerator compartment and a freezer compartment. And in the refrigerator-freezer of patent document 1, the control part (controller) arrange | positioned in this refrigerator-freezer is based on the detected temperature in each temperature sensor, between a compressor and the cooler of each compressor and each chamber. The operation with the three-way valve provided in the pipe line is controlled so that the temperature in each room is within a predetermined set temperature range.

Japanese Patent Laying-Open No. 2007-93052 (FIG. 1-2) Japanese Utility Model Publication No. 55-73794 (FIG. 1)

  In the refrigerator-freezer as shown in Patent Document 1 or Patent Document 2, for example, even if the temperature of the refrigerator compartment is equal to or lower than a predetermined set temperature range and the supply of refrigerant to the refrigerator for the refrigerator compartment is stopped. When the freezer compartment is being cooled, the compressor is operating. Along with this, the pressure on the refrigerant outlet side of the refrigerator for the refrigerator compartment decreases, the refrigerant remaining in the refrigerator for the refrigerator compartment is vaporized and the refrigerator compartment is cooled, and the temperature in the refrigerator compartment is lowered. To do.

  That is, for example, in the refrigerator refrigerator of Patent Document 1, when the refrigerator compartment is cooled below a predetermined temperature range, the three-way valve is switched and the refrigerant is sent to the refrigerator refrigerator. However, since the refrigerant is not sent, the residual refrigerant is vaporized as described above and the temperature of the refrigerator compartment is lowered. In this case, the stored items in the refrigerator compartment are frozen.

  On the other hand, in the refrigerator-freezer of patent document 2, the heater is provided in the refrigerator compartment, and when the compressor stops and the refrigerant is not supplied to the refrigerator for the refrigerator compartment, the heater is operated (ON). Thus, the surface temperature of the cooler is kept at 0 ° C. or higher. By using such a heater, it is possible to prevent the temperature in the refrigerator compartment from being excessively lowered.

  However, if the heater is operated each time the compressor stops, an excessive ON / OFF operation of the relay that switches the operation and stop of the heater is caused by this amount, which shortens the life of the relay and excessively operates the heater. As a result, the life of the heater is shortened. Further, every time the compressor is stopped, the power consumption is increased by the amount that the heater is operated.

  The present invention has been made to solve the above-described problems, and can prolong the life of the heater and the relay for switching between the operation and stop of the heater while preventing the refrigerator from being overcooled. An object of the present invention is to provide a refrigerator-freezer that can save power by not operating a heater more than necessary.

  The refrigerator-freezer according to the present invention has a refrigerator compartment 5 and a refrigerator compartment 6, and coolers 7 and 9 are arranged in the refrigerator compartment 5 and the refrigerator compartment 6, respectively, and are supplied to the respective refrigerators 7 and 9. The object is a refrigerator-freezer in which the refrigerator compartment 5 and the freezer compartment 6 are cooled by the heat of vaporization of the refrigerant. The refrigerant inlets 7a and 9a of the respective coolers 7 and 9 are connected to the refrigerant outlet 12b side of the same compressor 12 via the electromagnetic valves 15 and 19, respectively, and the refrigerant outlets 7b of the respective coolers 7 and 9 are connected. 9b is connected to the refrigerant inlet 12a side of the compressor 12, respectively, and in the refrigerator compartment 5 and the freezer compartment 6, temperature sensors 25 and 26 for detecting the temperature in each chamber 5 and 6 are arranged, Based on the temperature detected by the temperature sensors 25 and 26, the electromagnetic valves 15 and 19 are controlled to be turned on and off so that the chambers 5 and 6 are within a predetermined temperature range, and the inside of the refrigerator compartment 5 is heated. A control unit 23 for controlling the operation of the heat retaining heater 22 is provided. The control unit 23 is for the refrigerator compartment in a state where the electromagnetic valve 15 for the refrigerator compartment is off and the electromagnetic valve 19 for the freezer compartment is on. Temperature DR detected by the temperature sensor 25 of the refrigerator compartment 5 Timekeeping is started when the predetermined heater-on temperature value DHn or lower, and when the detected time DR of the refrigerator compartment 5 is equal to or lower than the heater-on temperature value DHn when the predetermined time Ht elapses. 22 is operated, and when the detected temperature DR of the refrigerator compartment 5 is higher than the heater ON temperature value DHn, the heat retaining heater 22 is not operated.

  The controller 23 stops the operation of the heat retaining heater 22 when the detected temperature DR of the refrigerating chamber 5 becomes equal to or higher than a predetermined heater off temperature value DHf that is higher than the heater on temperature value DHn after the heat retaining heater 22 is operated. It is supposed to let you.

  The heat retaining heater 22 is disposed so as to face the cooler 7 of the refrigerator compartment 5 and can also serve as a heater for defrosting the cooler 7 for the refrigerator compartment.

  In the present invention, the control unit 23 determines that the detection temperature DR of the refrigerating chamber 5 is equal to or lower than the heater on-temperature value DHn in a state where the refrigerating chamber electromagnetic valve 15 is off and the freezing chamber electromagnetic valve 19 is on. Even when the time measurement is started and the time T has exceeded the predetermined standby time Ht, if the detected temperature DR of the refrigerator compartment 5 is equal to or lower than the heater-on temperature value DHn, the heat retaining heater 22 is operated. Thereby, the inside of the refrigerator compartment 5 is heated.

  That is, when the refrigerating room solenoid valve 15 is off, the refrigerant is not sent to the refrigerating room cooler 7, but the already sent refrigerant remains in the cooler 7. If the freezer compartment solenoid valve 19 is on even when the refrigerator compartment solenoid valve 15 is off, the compressor 12 operates to send the refrigerant to the freezer compartment cooler 9. Yes. By the operation of the compressor 12, the pressure on the refrigerant outlet 7b side of the cooler 7 for the refrigerator compartment is lowered, and thereby the refrigerant remaining in the cooler 7 is vaporized. The inside of the refrigerator compartment 5 is cooled by this vaporization heat, and the temperature in the refrigerator compartment 5 falls. In the present invention, even when the time T has passed the standby time Ht, if the detected temperature DR of the refrigerator compartment 5 is equal to or lower than the heater-on temperature value DHn, the heat retaining heater 22 is turned on to heat the refrigerator compartment 5 Thus, the inside of the refrigerator compartment 5 is prevented from becoming excessively cold due to the vaporization of the residual refrigerant. As a result, it is possible to prevent the stored items in the refrigerator compartment 5 from being frozen or the temperature fluctuation range in the refrigerator compartment 5 from being increased, resulting in quality deterioration of the stored items.

  On the other hand, according to the present invention, when the measured time T passes the standby time Ht and the detected temperature DR of the refrigerator compartment 5 is higher than the heater-on temperature value DHn, the heat retaining heater 22 does not operate. That is, even if the detected temperature DR of the refrigerator compartment 5 becomes equal to or lower than the heater ON temperature value DHn, for example, immediately after this, when the freezer compartment electromagnetic valve 19 is turned off and the compressor 12 is stopped, the refrigerator compartment cooling is performed. The pressure drop on the refrigerant outlet 7b side of the cooler 7 is stopped, and the vaporization of the refrigerant remaining in the cooler 7 is suppressed. For this reason, the temperature in the refrigerator compartment 5 becomes higher than the heater ON temperature value DHn at an early stage. In this case, the time in which the refrigerator compartment 5 is equal to or lower than the heater-on temperature value DHn is short, so that the stored items in the refrigerator compartment 5 are not frozen or deteriorated in quality. In such a case, by not operating the heat retaining heater 22, it is possible to prevent the heat retaining heater 22 from being frequently operated and stopped. Thus, in order to operate and stop the heat retaining heater 22, for example, the number of opening and closing of the relay connected to the heat retaining heater 22 can be reduced, and the life of the relay can be extended. The life of the heat retaining heater 22 can be extended by decreasing. Furthermore, power saving can be achieved by not operating the heat retaining heater 22 more than necessary.

  If the detected temperature DR of the refrigerating chamber 5 becomes higher than the heater off temperature value DHf that is higher than the heater on temperature value DHn after the heat retaining heater 22 is activated, the operation of the heat retaining heater 22 is stopped. The warming heater 22 can be operated until the temperature is sufficiently warmed, and the inside of the refrigerator compartment 5 can be reliably prevented from becoming too low.

  If the heat insulation heater 22 also serves as a heater for defrosting the cooler 7 for the refrigerator compartment, it is not necessary to provide the heat insulation heater 22 separately from the heater for defrosting. Can be prevented.

  An embodiment of a refrigerator-freezer according to the present invention will be described with reference to FIGS. In FIG. 2, the refrigerator / freezer 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. And the refrigerator compartment 5 is comprised in the upper part of the partition wall 2 in the case main body 1, and the freezer compartment 6 is comprised in the lower part of the partition wall 2. FIG. That is, the present refrigerator-freezer has a refrigerator compartment 5 and a freezer compartment 6.

  In the refrigerator compartment 5 and the freezer compartment 6, coolers 7 and 9 are arranged, respectively. The cooler 7 of the refrigerator compartment 5 is arranged at the upper end portion in the duct 4 arranged at the rear portion of the refrigerator compartment 5. The cold air in the refrigerator compartment 5 sucked into the duct 4 by the fan 8 arranged in the upper opening of the duct 4 is cooled by the cooler 7 and then blown out from the lower opening of the duct 4 into the refrigerator compartment 5. The The cooler 9 of the freezer compartment 6 is formed in a panel shape and disposed on the inner wall of the freezer compartment 6. The inside of the refrigerator compartment 5 is cooled to 5 ° C., for example, and the inside of the freezer compartment 6 is cooled to −30 ° C., for example. Each front opening of the refrigerator compartment 5 and the freezer compartment 6 is opened and closed by the doors 10 and 11 having a heat insulating structure.

  As shown in FIG. 1, a refrigeration mechanism 18 is disposed in the machine room 3, and the refrigeration mechanism 18 includes a single compressor 12 and a single condenser 13. The refrigerant inlets 7a and 9a of the respective coolers 7 and 9 are connected to the refrigerant outlet 13b of the condenser 13 via the expansion valves 16 and 20 and the electromagnetic valves 15 and 19, respectively, and the refrigerant inlet 13a of the condenser 13 is Connected to the refrigerant outlet 12 b of the compressor 12. That is, the refrigerant inlets 7 a and 9 a side of the coolers 7 and 9 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 7b of the cooler 7 in the refrigerator compartment 5 is connected to the refrigerant inlet 12a of the compressor 12 via the capillary tube 17, and the refrigerant outlet 9b of the cooler 9 in the freezer compartment 6 is connected to the check valve 21. To the refrigerant inlet 12 a of the compressor 12. That is, the refrigerant outlets 7b and 9b of the coolers 7 and 9 are connected to the refrigerant inlet 12a side of the compressor 12, respectively.

  As shown in FIG. 2, a heat retaining heater 22 is disposed in the refrigerator compartment 5 so as to face the cooler 7, and the heat retaining heater 22 is used for defrosting the cooler 7 in the refrigerator compartment 5 and refrigerated. Used for heating in the chamber 5. In the refrigerator compartment 5 and the freezer compartment 6, temperature sensors 25 and 26 (FIG. 1) for detecting the temperatures in the respective compartments 5 and 6 are arranged. The condenser 13 is cooled by the air blown by the fan 14.

  The refrigerator-freezer controls the on / off of the solenoid valves 15 and 19 so that the interiors of the chambers 5 and 6 are within a predetermined temperature range based on the detected temperatures of the temperature sensors 25 and 26, and the heat retaining heater 22. The control part 23 which controls the action | operation of is provided. The warming heater 22 is operated by a relay (not shown) that is controlled to open and close by the control unit 23.

  The control unit 23 operates the compressor 12 when at least one of the electromagnetic valves 15 and 19 is on (opened), and the compressor 23 when the electromagnetic valves 15 and 19 are off (closed). 12 is stopped. When the refrigerating room electromagnetic valve 15 is turned on, the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 is supplied to the refrigerating room cooler 7, and the inside of the refrigerating room 5 is cooled by the heat of vaporization of the refrigerant. Is done. Further, when the freezer compartment electromagnetic valve 19 is turned on, the refrigerant compressed by the compressor 12 and liquefied by the condenser 13 is supplied to the freezer compartment cooler 9, and the heat of vaporization of the refrigerant causes the inside of the freezer compartment 6. Is cooled.

  Next, operation | movement of the refrigerator-freezer of this invention is demonstrated using the flowchart of FIG. 3, and the timing chart of FIG. The flowchart of FIG. 3 (hereinafter referred to as this flowchart) is executed in a state where the electromagnetic valve 15 for the refrigerator compartment is turned off and the electromagnetic valve 19 for the freezer compartment is turned on. The control unit 23 incorporates a timer 29 (FIG. 1) for timekeeping, and the timer 29 is reset when the execution of this flowchart is started.

  Prior to the execution of this flowchart, the control unit 23, as shown in the timing chart of FIG. 4, is a predetermined refrigerator compartment valve in which the detected temperature DR of the refrigerator compartment 5 by the temperature sensor 25 for the refrigerator compartment is set in advance. When the on-temperature value Dn1 (for example, 7 ° C.) or more is reached, the electromagnetic valve 15 for the refrigerator compartment is turned on, and then the detected temperature DR falls below a predetermined refrigerator compartment valve off-temperature value Df1 (for example, 3 ° C.). Then, the solenoid valve 15 is turned off. Moreover, the control part 23 is for freezer compartment, if the detection temperature DF of the freezer compartment 6 in the temperature sensor 26 for freezer compartment becomes more than predetermined freezer compartment valve ON temperature value Dn2 (for example, -28 degreeC). The solenoid valve 19 is turned on, and then the solenoid valve 19 is turned off when the detected temperature DF falls below a predetermined freezer compartment valve off temperature value Df2 (for example, −31 ° C.).

  And when the control part 23 performs this flowchart, it is judged first whether the detection temperature DR of the refrigerator compartment 5 is below predetermined heater ON temperature value DHn (for example, 2 degreeC) set beforehand ( S1) If the detected temperature DR exceeds the heater ON temperature value DHn (NO in S1), whether or not the solenoid valve 15 for the refrigerator compartment is off and the solenoid valve 19 for the freezer compartment is on. Is discriminated (S2, S3). If the electromagnetic valve 15 for the refrigerator compartment is off and the electromagnetic valve 19 for the freezer compartment is on (YES in S2 and S3), the process returns to S1 and the processes after S1 are repeated. Note that the heater ON temperature value DHn is set to a temperature value lower than the refrigerator compartment valve OFF temperature value Df1.

  On the other hand, when the detected temperature DR of the refrigerator compartment 5 becomes equal to or lower than the heater-on temperature value DHn in S1 (YES in S1), the control unit 23 starts counting by the timer 29 (S4: time t1), and the timer 29 measures time T. However, until a predetermined standby time Ht (for example, 60 seconds) set in advance is elapsed (NO in S5), the process proceeds to S2 and the processes after S2 are repeated. When the timing time T has passed the standby time Ht (YES in S5: time t2), the control unit 23 has the detected temperature DR of the refrigerator compartment 5 equal to or lower than a predetermined heater off temperature value DHf (for example, 3 ° C.). Whether or not (S6).

  When YES in S5, the detected temperature DR of the refrigerator compartment 5 is equal to or lower than the heater on temperature value DHn, and is lower than the heater off temperature value DHf (NO in S6). (S7). The operation of the heat retaining heater 22 heats the refrigerator compartment 5 and raises the temperature in the refrigerator compartment 5. Thereafter, when the detected temperature DR of the refrigerator compartment 5 becomes equal to or higher than the heater off temperature value DHf (YES in S6: time t3), the controller 23 stops the operation of the heat retaining heater 22 and stops the heating in the refrigerator compartment 5. (S8), and the execution of this flowchart ends. The heater off temperature value DHf is a temperature value higher than the heater on temperature value DHn.

  On the other hand, even if the detected temperature DR of the refrigerating chamber 5 once becomes equal to or lower than the heater ON temperature value DHn in S1 (YES in S1: time t4), the detected temperature DR of the refrigerating chamber 5 becomes the heater ON temperature value before the standby time Ht elapses. When it becomes higher than DHn (NO in S1, time t5), the control unit 23 does not proceed to S6, for example, waits for the electromagnetic valve 15 for the refrigerator compartment to be turned on (YES in S2), and then executes this flowchart. finish. In this case, the heat retaining heater 22 does not operate.

  In S2 and S3, for example, when the detected temperature DF of the freezer compartment 6 is equal to or lower than the freezer valve off temperature value Df2 and the electromagnetic valve 19 for the freezer compartment is off (NO in S3), When the temperature in the refrigerator compartment 5 rises because the outside air temperature is high and the solenoid valve 15 for the refrigerator compartment is on (NO in S2), the control unit 23 ends the execution of this flowchart.

  Thus, in the present invention, the control unit 23 determines that the detection temperature DR of the refrigerator compartment 5 is the heater on temperature value DHn in a state where the electromagnetic valve 15 for the refrigerator compartment is off and the solenoid valve 19 for the freezer compartment is on. Time measurement starts when the temperature falls below, and when the detected time DR of the refrigerator compartment 5 is equal to or lower than the heater-on temperature value DHn when the time T passes the standby time Ht, the heat retaining heater 22 is operated.

  That is, when the refrigerating room solenoid valve 15 is off, the refrigerant is not sent to the refrigerating room cooler 7, but the refrigerant already sent remains in the cooler 7 as a liquid. Further, when the electromagnetic valve 19 for the freezer compartment is on even if the electromagnetic valve 15 for the refrigerator compartment is off, the compressor 12 operates to send the refrigerant to the cooler 9 for the freezer compartment. Due to the operation of the compressor 12, the pressure on the refrigerant outlet 7b side of the cooler 7 for the refrigerating chamber is reduced, whereby the remaining refrigerant in the cooler 7 is vaporized, and the inside of the refrigerating chamber 5 is cooled by this heat of vaporization. As a result, the temperature in the refrigerator compartment 5 decreases. According to the present invention, if the detected temperature DR of the refrigerating chamber 5 is equal to or lower than the heater on temperature value DHn when the timing time T has passed the standby time Ht, the heat retaining heater 22 is turned on to heat the refrigerating chamber 5 and refrigerate. The inside of the chamber 5 is prevented from becoming excessively low temperature due to vaporization of the residual refrigerant.

  On the other hand, according to the present invention, when the measured time T passes the standby time Ht and the detected temperature DR of the refrigerator compartment 5 is higher than the heater-on temperature value DHn, the heat retaining heater 22 does not operate. That is, for example, even if the detected temperature DR of the refrigerator compartment 5 is equal to or lower than the heater on temperature value DHn, immediately after this, when the electromagnetic valve 19 for the freezer compartment is turned off and the compressor 12 is stopped, the refrigerator compartment cooling is performed. The pressure drop on the refrigerant outlet 7b side of the cooler 7 is stopped, and the vaporization of the refrigerant remaining in the cooler 7 is suppressed. For this reason, the temperature in the refrigerator compartment 5 becomes higher than the heater ON temperature value DHn at an early stage. In such a case, by not operating the heat retaining heater 22, it is possible to prevent the heat retaining heater 22 from being frequently operated and stopped.

  For example, the controller 23 activates the heat retaining heater 22 at a predetermined time (nighttime or the like) to defrost the cooler 7 for the refrigerator compartment. In this flowchart, after the warming heater 22 is activated in S7, if the detected temperature DR of the refrigerator compartment 5 is equal to or higher than the heater off temperature value DHf (YES in S6), the warming heater 22 is deactivated. After the operation of 22, the operation of the heat retaining heater 22 may be stopped when a predetermined time has elapsed. The heater on temperature value DHn may be equal to the heater off temperature value DHf.

It is a block block diagram which shows the freezer refrigerator which concerns on this invention. It is a schematic longitudinal cross-sectional view which shows schematic structure of the freezer 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 Refrigerating room 6 Freezer room 7/9 Cooler 7a / 9a Cooler refrigerant inlet 7b / 9b Cooler refrigerant outlet 12 Compressor 12a Compressor refrigerant inlet 12b Compressor refrigerant outlet 15/19 Solenoid valve 22 Insulating heater 23 Control unit 25/26 Temperature sensor

Claims (3)

While having a refrigerator compartment (5) and a freezer compartment (6), the refrigerator (7 * 9) is each arrange | positioned to these refrigerator compartment (5) and freezer compartment (6), and each cooler (7 * 9) A refrigerator-freezer in which the refrigerator compartment (5) and the freezer compartment (6) are cooled by the heat of vaporization of the refrigerant supplied to
Refrigerant inlets (7a, 9a) of the respective coolers (7, 9) are connected to the refrigerant outlet (12b) side of the same compressor (12) via electromagnetic valves (15, 19), respectively. The refrigerant outlets (7b, 9b) of (7, 9) are connected to the refrigerant inlet (12a) side of the compressor (12), respectively.
In the refrigerator compartment (5) and the freezer compartment (6), temperature sensors (25, 26) for detecting the temperature in each compartment (5, 6) are arranged, respectively.
Based on the temperature detected by each temperature sensor (25, 26), on / off of each solenoid valve (15, 19) is controlled so that the inside of each chamber (5, 6) is within a predetermined temperature range. (5) A control unit (23) for controlling the operation of the heat retaining heater (22) for heating the inside is provided,
The control unit (23) is configured to store the refrigerator compartment (5) by the temperature sensor (25) for the refrigerator compartment in a state where the solenoid valve (15) for the refrigerator compartment is turned off and the solenoid valve (19) for the refrigerator compartment is turned on. ) Starts to time when the detected temperature (DR) becomes equal to or lower than a predetermined heater-on temperature value (DHn), and when the time (T) exceeds a predetermined waiting time (Ht), the refrigerator compartment (5) When the detected temperature (DR) is equal to or lower than the heater on temperature value (DHn), the insulated heater (22) is operated, and the detected temperature (DR) of the refrigerator compartment (5) is higher than the heater on temperature value (DHn). In the refrigerator-freezer, the heat retaining heater (22) is not operated.   The control unit (23), after the heat retaining heater (22) is operated, detects a predetermined heater off temperature value (DHf) in which the detected temperature (DR) of the refrigerator compartment (5) is higher than the heater on temperature value (DHn). ) The refrigerator-freezer according to claim 1, wherein the heat-retaining heater (22) is stopped when the above is reached.   The heat-retaining heater (22) is arranged facing the cooler (7) of the refrigerator compartment (5) and serves also as a defrosting heater of the refrigerator (7) for the refrigerator compartment. 2. The refrigerator-freezer according to 2.

Images