JP6393895B2 - Refrigeration cycle equipment - Google Patents

Description

  The present invention relates to a refrigeration cycle apparatus using a mixed working fluid containing CO2.

  In general, the refrigeration cycle apparatus comprises a compressor, a four-way valve if necessary, a radiator (or a condenser), a decompressor such as a capillary tube or an expansion valve, an evaporator, etc., and constitutes a refrigeration cycle. Cooling or heating action is performed by circulating a refrigerant inside.

  As refrigerants in these refrigeration cycle apparatuses, chlorofluorocarbons (fluorocarbons are described as ROO or ROOXX are defined by the US ASHRAE 34 standard. Hereinafter, they are indicated as ROO or RXX. ) Or halogenated hydrocarbons derived from methane or ethane are known.

  In recent years, a refrigeration cycle apparatus using a natural refrigerant such as carbon dioxide (R744) in place of a chlorofluorocarbon refrigerant has been proposed from the viewpoint of global environmental problems (see, for example, Patent Document 1).

JP 2010-134509 A

  However, since carbon dioxide has a low critical temperature, there is a problem that the high pressure side of the refrigeration cycle is in a supercritical state and the coefficient of performance decreases.

  In consideration of the above-described conventional problems, the present invention provides a mixed working fluid more suitable for a refrigeration cycle apparatus used for heating applications such as a vending machine having a heating function and a hot water heater. It aims at providing the refrigerating-cycle apparatus to be used.

In order to solve the above-described conventional problems, a refrigeration cycle apparatus of the present invention includes a refrigeration cycle used for a heating application to which a compressor, a radiator, a decompressor, and an evaporator are connected, and serves as a refrigerant for the refrigeration cycle. Carbon dioxide and 1,1,2-trifluoroethylene, and the diacid
This is a refrigeration cycle apparatus using a mixed working fluid in which carbonized carbon is 70 wt% or more and the 1,1,2-trifluoroethylene is 30 wt% or less.

In addition, a refrigeration cycle used for heating applications connected to a compressor, a radiator, a decompressor, and an evaporator is provided, and carbon dioxide, 1,1,2-trifluoroethylene, and difluoromethane are used as refrigerants for the refrigeration cycle. The carbon dioxide is 70 wt% or more, and the sum of the 1,1,2-trifluoroethylene and the difluoromethane is 30 wt% or less, and the difluoromethane wt% is the 1,1 , A refrigeration cycle apparatus that is 2% by weight or more of 2-trifluoroethylene.

  The present invention can provide a refrigeration cycle apparatus using a refrigerant suitable for a refrigeration cycle apparatus that is used at a high-pressure side heat exchange temperature of 30 ° C. to 40 ° C., which is the ambient temperature of the product, by increasing the critical temperature. In addition, a refrigeration cycle apparatus using a refrigerant more suitable for a refrigeration cycle apparatus used for heating can be obtained.

Refrigerant circuit diagram of refrigeration cycle apparatus of vending machine according to this embodiment Refrigerant circuit diagram of a refrigeration cycle apparatus according to a modification of the present embodiment

  1st invention is equipped with the refrigerating cycle which connected the compressor, the heat radiator, the decompressor, and the evaporator, The carbon dioxide and 1,1, 2- trifluoroethylene are included as a refrigerant | coolant of the said refrigerating cycle, This is a refrigeration cycle apparatus using a mixed working fluid in which 1,1,2-trifluoroethylene is 30% by weight or less. According to this, the coefficient of performance (COP) in the operation | movement which used the heat radiator as the utilization side heat exchanger can be improved, and 1,1, 2- trifluoroethylene can be made nonflammable.

  A second invention includes a refrigeration cycle to which a compressor, a radiator, a decompressor, and an evaporator are connected, and carbon dioxide, 1,1,2-trifluoroethylene, and difluoromethane are used as refrigerants of the refrigeration cycle. And the sum of the 1,1,2-trifluoroethylene and the difluoromethane is 30% by weight or less, and the weight% of the difluoromethane is not less than the weight% of the 1,1,2-trifluoroethylene. Cycle equipment. According to this, disproportionation reaction of 1,1,2-trifluoroethylene can be suppressed while suppressing the global warming potential (GWP).

  According to a third invention, in the first or second invention, the apparatus includes a plurality of product storage chambers, the evaporator is disposed in parallel in each of the product storage chambers, and the heat dissipation is performed in at least one of the product storage chambers. A container is placed. According to this, the operation efficiency of a vending machine or the like that can heat the product storage room can be improved.

  According to a fourth invention, in the first or second invention, the heat medium having water as a main component is heated by a radiator. According to this, operation efficiency, such as a hot water heater which heats water with a radiator, can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
The mixed working fluid according to Embodiment 1 of the present invention includes (1) carbon dioxide (CO2, R744, boiling point -78 ° C) and (2) 1,1,2-trifluoroethylene (CF2 = CHF, R1123, boiling point). -51 ° C), a two-component working fluid. The excellent characteristics when the mixed working fluid in the present embodiment is used as the refrigerant of the refrigeration cycle apparatus are shown below.

(Table 1) shows the performance as a refrigerant of a mixed working fluid of two-component system composed of carbon dioxide (CO2) and 1,1,2-trifluoroethylene (R1123) in which R1123 is 10 wt% to 40 wt%. Compared to a single refrigerant with CO2.

  In (Table 1), the refrigeration performance is as follows: the evaporator outlet temperature is −5 ° C., the high pressure is 10 MPa, the decompressor inlet temperature is 30 ° C., and the compressor suction temperature is 15 ° C. is there. In addition, this condition assumes a general condition when heating at least 1 room | chamber in the refrigerating-cycle apparatus used for a vending machine. The heating capacity was determined from the discharge temperature to the beverage temperature, and the cooling capacity was determined from the evaporator inlet temperature to the evaporator outlet temperature. The heating capacity, heating COP, cooling capacity, and cooling COP are shown as a ratio with each value of the CO2 single refrigerant as 100.

  Further, by mixing up to 30% by weight of R1123, it is possible to improve the heating capacity, which is the amount of heat that can be used in the internal gas cooler, as compared with a single CO2 refrigerant. Further, by mixing up to 40% by weight of R1123, heating COP (ratio of heating capacity to compressor input) can be improved as compared with a CO2 single refrigerant.

  On the other hand, by mixing R1123, the cooling capacity (amount of heat that can be used in the evaporator) and the cooling COP (ratio of the cooling capacity to the compressor input) are reduced as compared with the CO2 single refrigerant.

  In the two-component system of CO2 and R1123, considering the heating capacity and heating COP comprehensively (that is, specifying a mixing ratio suitable for heating (heating) applications), a mixture containing 30 wt% or less of R1123 is desirable. More desirably, a mixture containing 10% by weight or more of R1123 is desirable.

  Furthermore, considering the refrigeration performance during heating (heating) (heating capacity, heating COP, etc.) and the refrigeration performance during cooling (cooling capacity, cooling COP, etc.) comprehensively (ie for heating (heating) applications) A mixture containing 20 wt% or less of R1123 is desirable, given a mixing ratio that is suitable and suitable for cooling applications.

In addition, since the critical temperature of R1123 is higher than the critical temperature of a CO2 single refrigerant | coolant, the mixture which mixed R1123 will have a critical temperature more than the critical temperature of a CO2 single refrigerant | coolant. (Table 1) shows critical temperatures when R1123 is mixed. By mixing R1123, the critical temperature becomes high, so that the cooling COP can be improved. By raising the critical temperature, the heat exchange temperature on the high-pressure side is suitable for a refrigeration cycle apparatus used at 30 to 40 ° C., which is the ambient temperature of the product.

  In particular, a mixture in which 70% by weight of CO 2 and 30% by weight of R1123 are mixed has a critical temperature of 44 ° C., so that the heat exchange temperature on the high pressure side is 40 ° C. or lower and is suitable for a refrigeration cycle apparatus used for cooling applications. . Or it is suitable for the refrigerating cycle apparatus used for the heating application when the heat exchange temperature on the high pressure side is 50 ° C. or higher.

  In the two-component system of CO2 and R1123, an azeotrope is not formed, and a non-azeotrope having an evaporation temperature gradient is formed. However, in a mixture in which 30 wt% or less of R1123 is mixed, the evaporation temperature gradient is almost 10 deg or less, and the non-azeotropic property is small, and there is a problem such as adhesion of frost to the evaporator when used in a refrigeration cycle apparatus. It is a refrigerant that is difficult to generate and easy to handle.

  In Table 1, the flammability indicates the rank of the flammability classification defined by the US ASHRAE 34 standard. In this standard, non-toxic substances are classified as A, A1, A2, and A3 according to the degree of flammability. Here, R744 is classified into substantially incombustible A1 as in the case of R22, R125, R134a, etc., which are conventionally used refrigerants. R1123 is classified as weakly flammable A2.

  When CO2 and R1123 were mixed, an experiment based on the US ASHRAE 34 standard was conducted. As a result, it was found that when R1123 is less than about 33% by weight, it can be determined as an A1 refrigerant.

  In a two-component system of CO2 and R1123, in view of comprehensively adding flammability to refrigeration performance, a mixture containing R1123 of 33% by weight or less is desirable, and more preferably 30% in consideration of filling errors during mixing. Mixtures containing up to wt% R1123 are desirable.

  Further, such a mixed working fluid has no effect on the stratospheric ozone layer and has a low GWP, and therefore has little effect on global warming.

  FIG. 1 is a refrigerant circuit diagram of a vending machine provided with the refrigeration cycle apparatus of the present embodiment.

  As shown in FIG. 1, the vending machine 100 includes a product storage 1 that stores products such as canned beverages, and a machine room (not shown) that is disposed below the product storage 1. The product storage 1 is divided into three sections, a first cooling greenhouse 2 for cooling or heating the stored product, a second cooling greenhouse 3 (hot / cold switching product storage room), and cooling the stored product. And a dedicated cooling room 4 (cold dedicated product storage room). When there is no need to particularly distinguish the first cooling greenhouse 2, the second cooling greenhouse 3, and the cooling exclusive room 4, they are simply referred to as a product storage room or a room. In each room, a product storage shelf (not shown) is suspended at the top, and the product is stored inside.

  The vending machine 100 includes a refrigeration cycle 5 in which a mixed working fluid of CO2 and R1123 circulates as a refrigerant. The refrigeration cycle 5 includes a compressor 7 that compresses the refrigerant, a gas cooler 9 as a radiator, a strainer 11, Openable and closable first to third solenoid valves (open / close valves) 13, 14, 15; first to third capillary tubes (decompressors) 16, 17, 18; first to third evaporators 19, 20, 21, And it is comprised including the internal heat exchanger 22.

The compressor 7 is an inverter type rotary compressor that can compress the refrigerant to the supercritical pressure on the high pressure side of the refrigeration cycle 5. The compressor 7 compresses the low-pressure refrigerant sucked from the refrigerant suction pipe 23, and the high-temperature and high-pressure refrigerant is discharged to the refrigerant discharge pipe 24.

  The refrigerant discharge pipe 24 is connected to the inlet side of the gas cooler 9, and the outlet side pipe 26 having the strainer 11 is connected to the outlet side of the gas cooler 9. Between the outlet side pipe 26 and the refrigerant suction pipe 23, first to third evaporators 19, 20, and 21 are connected in parallel to each other. The first to third evaporators 19, 20, and 21 are disposed in the first cooling chamber 2, the second cooling chamber 3, and the cooling chamber 4, respectively. Between the strainer 11 and the first to third evaporators 19, 20, 21, the first to third solenoid valves 13, 14, 15 and the first to third capillary tubes 16 are arranged along the refrigerant flow direction. , 17 and 18 are provided in series, respectively.

  The refrigerant suction pipe 23 is provided with a check valve 25 for preventing the refrigerant from flowing backward.

  The internal heat exchanger 22 is disposed between the refrigerant suction pipe 23 and the outlet side pipe 26 of the gas cooler 9, and the high-pressure refrigerant cooled by the gas cooler 9 and the low-pressure evaporated by the evaporators 19, 20, and 21, respectively. Heat exchange is performed with the gas refrigerant. In the present embodiment, by providing the internal heat exchanger 22, the refrigerant that has passed through the gas cooler 9 can be further cooled to increase the cooling capacity.

  The gas cooler 9 is provided with a gas cooler blower fan 27 that blows air toward the gas cooler 9. Similarly, the first to third evaporators 19, 20, and 21 have first to third evaporator fans 28, 29, and 30 that blow air toward the first to third evaporators 19, 20, and 21, respectively. And the 1st-3rd evaporator temperature detection sensors 31, 32, and 33 which detect the temperature of the 1st-3rd evaporators 19, 20, and 21 are arrange | positioned.

  The first and second cooling greenhouses 2 and 3 are provided with first and second electric heaters 34 and 35 for heating the room, respectively. Further, the first cooling greenhouse 2, the second cooling greenhouse 3, and the cooling exclusive chamber 4 are provided with first to third indoor temperature detection sensors 36, 37, and 38 for detecting the temperature of each room.

  The refrigeration cycle 5 includes a heat exchanger (heating unit) that performs heating by using waste heat generated by cooling. That is, the refrigerant discharge pipe 24 of the compressor 7 is provided with a three-way valve 50, and the three-way valve 50 has a refrigerant in an internal radiator (internal gas cooler) 51 disposed in the first cooling greenhouse 2. An inlet side pipe 52 is connected, and a refrigerant outlet side pipe 53 of the internal gas cooler 51 is connected between the three-way valve 50 and the gas cooler 9 to a pipe 59 which is a part of the refrigerant discharge pipe 24.

  The internal gas cooler 51 is formed as an integrated heat exchanger that shares the fins with the first evaporator 19.

  The high-temperature and high-pressure refrigerant discharged from the compressor 7 flows into the internal gas cooler 51, whereby the inside of the first cooling greenhouse 2 can be heated, and the internal gas cooler 51 serves as a heating unit. Function.

  Further, the gas cooler 9 is provided with an outside-compartment evaporator 58 that shares the fins with the gas cooler 9, and a refrigerant outlet side pipe 54 of the outside-compartment evaporator 58 is connected to the refrigerant suction pipe 23 of the compressor 7. Yes. The refrigerant inlet side pipe 55 of the outside evaporator 58 has an outside capillary tube 56 and an outside solenoid valve 57 and is connected to the outlet side pipe 26 of the gas cooler 9.

  The outside evaporator 58 is an evaporator for achieving a heat balance when the refrigerant is circulated through the inside gas cooler 51 in order to heat the first cooling greenhouse 2. The refrigerant is circulated to the outside evaporator 58 after being opened.

  Each part of the vending machine 100 is operation-controlled based on the controller 40, cools the product stored in the cooling exclusive chamber 4 to an appropriate temperature, and, according to the setting of the user, the first cooling greenhouse 2, 2 Cool or warm the product stored in the cooling greenhouse 3 to an appropriate temperature.

  The operation of the vending machine 100 configured as described above will be described.

  First, when all the chambers are set to be cooled, the compressors 7 are started by opening all the first to third electromagnetic valves 13, 14, 15. The first to third solenoid valves 13, 14, 15 may be opened at the same time, or may be opened in order at intervals. The refrigerant discharged from the compressor 7 flows through the refrigerant discharge pipe 24 and flows into the gas cooler 9 to be cooled. The cooled liquid refrigerant is distributed into three, passes through the first to third electromagnetic valves 13, 14, 15, and is depressurized by the first to third capillary tubes 16, 17, 18. The third evaporators 19, 20, and 21 evaporate and cool the surrounding air. The evaporated and evaporated refrigerant joins again and returns to the compressor 7 through the refrigerant suction pipe 23.

  In this embodiment, in order to reduce the load at the time of cooling, among the first cooling greenhouse 2, the second cooling greenhouse 3, and the cooling exclusive chamber 4, the electromagnetic valves of two chambers having a high indoor temperature are opened, Cool the two chambers. And when one chamber falls to target temperature, the electromagnetic valve of this chamber is closed, and the other chamber and the electromagnetic valves of the remaining chambers that have not been cooled are opened to cool the two chambers. When the two chambers are cooled to the target temperature, the remaining one chamber is cooled to the target temperature.

  Next, when the first cooling greenhouse 2 is heated and the second cooling greenhouse 3 and the cooling exclusive chamber 4 are set to cool, the first electromagnetic valve 13 is closed, the second electromagnetic valve 14 and the second 3 Open the solenoid valve 15 and start the compressor 7. In this case, since the first electromagnetic valve 13 is closed, the liquid refrigerant cooled by the gas cooler 9 does not flow through the first evaporator 19.

  On the other hand, the first electric heater 34 is energized, and the high-temperature and high-pressure refrigerant discharged from the compressor 7 is caused to flow into the internal gas cooler 51, whereby the first cooling greenhouse 2 is heated until it reaches a predetermined temperature. Is executed. Moreover, the 1st evaporator ventilation fan 28 is drive | operated and the temperature unevenness in the 1st cooling heating greenhouse 2 by the heat warmed by the 1st electric heater 34 or the internal gas cooler 51 is prevented.

  About the cooling operation of the 2nd cooling greenhouse 3 and the cooling exclusive room 4, since it is the same as that of the case where all the above-mentioned rooms are cooled, description is abbreviate | omitted.

  When the second cooling greenhouse 3 is heated and the first cooling greenhouse 2 and the cooling exclusive chamber 4 are set to be cooled, the second electromagnetic valve 14 is closed, the first electromagnetic valve 13 and The third electromagnetic valve 15 is opened and the compressor 7 is started. In this case, the second electric heater 35 is energized and heating is performed until the second cooling greenhouse 3 reaches a predetermined temperature. Further, the second evaporator blower fan 29 is operated. Furthermore, when the first cooling greenhouse 2 and the second cooling greenhouse 3 are heated and the cooling exclusive chamber 4 is set to cool, the first electromagnetic valve 13 and the second electromagnetic valve 14 are closed, The third electromagnetic valve 15 is opened and the compressor 7 is started. In this case, the first electric heater 34 is energized, and the high-temperature and high-pressure refrigerant discharged from the compressor 7 is caused to flow into the internal gas cooler 51, and the second electric heater 35 is energized to supply the first cooling chamber 2. And heating is performed until the 2nd cooling greenhouse 3 each reaches predetermined temperature. The first evaporator blower fan 28 and the second evaporator blower fan 29 are operated.

  In the above-described embodiment, an electromagnetic valve as an on-off valve and a capillary tube as a pressure reducing means are provided. However, an electric expansion valve whose opening degree can be freely changed is provided, and this electric expansion valve is an on-off valve. It is good also as a structure which has a function with a pressure reduction means together.

  According to the present embodiment, since a mixed working fluid comprising CO 2 and R 1123 and containing 30 wt% or less of R 1123 is used as the refrigerant, high efficiency is achieved in the operation of heating the first cooling greenhouse 2. Driving is possible. In particular, the effect becomes remarkable in the operation which heats the 1st cooling greenhouse 2 to 50 degreeC or more.

  If a mixed working fluid of CO2 and R1123 is used, the efficiency at the time of cooling operation is lowered. (1) Since the vending machine in recent years has improved the heat insulation performance of the main body, the cooling operation is performed. (2) Since the temperature of the beverage that has been warmed begins to drop from the beverage stored in the lower part of the product storage room, which has a fast carry-out opportunity, it is difficult to keep warm for a long time, Considering that it is important to use a mixed working fluid of CO2 and R1123 suitable for heating (heating) applications, it is beneficial for a vending machine.

<Modification 1>
A modified example of the mixed working fluid obtained by mixing R1123 with CO2 will be described.

  The critical temperature (78.1 ° C.) of difluoromethane (CH 2 F 2, R 32, boiling point −51.7 ° C.) is higher than the critical temperature of the CO 2 single refrigerant (critical temperature 31.1 ° C.). The critical temperature will have a critical temperature that is greater than or equal to the critical temperature of the CO2 single refrigerant.

  Further, since the temperature characteristic of R32 is close to that of R1123, even when R32 is mixed with CO2 instead of R1123, the same tendency as in (Table 1) is exhibited and the same effect as described above is exhibited.

  In addition, when R1123 generates a radical, it may be changed to another compound by a disproportionation reaction. Since the disproportionation reaction involves a large heat release, the reliability of the compressor and the refrigeration cycle apparatus may be reduced. For this reason, when using R1123 for a compressor or a refrigeration cycle apparatus, it is necessary to suppress this disproportionation reaction. However, the CO2 molecule itself is nonpolar but is polarized to an oxygen atom as a constituent atom, and CO2 may promote the disproportionation reaction of R1123 by its action. On the other hand, R32 also polarizes to fluorine atoms, but the degree of polarization is smaller than that of oxygen atoms.

  In other words, mixing R32 whose polarization is smaller than CO2 reduces the disproportionation reaction caused by CO2, and R1123 and R32 have similar physical characteristics, so the behavior during phase change such as condensation evaporation is integrated. Thus, the disproportionation reaction of R1123 can be suppressed by the action of reducing the disproportionation reaction opportunity. In particular, in terms of suppressing the disproportionation reaction, the mixing ratio (wt%) of R32 to be mixed is equal to or higher than the mixing ratio (wt%) of R1123, whereby the molar weight of R32 is 1. The effect of suppressing the disproportionation reaction is 6 times or more, and the mixing ratio (wt%) or more is desirable.

  On the other hand, from the viewpoint of preventing global warming, the mixing ratio (% by weight) of R32 having a high GWP of 675 should be kept low.

  For this purpose, (1) carbon dioxide (CO2, R744, boiling point -78 ° C), (2) 1,1,2-trifluoroethylene (CF2 = CHF, R1123, boiling point -51 ° C), and (3) difluoro A three-component system consisting of methane (CH2F2, R32, boiling point-51.7 ° C), the sum of the mixing ratio of (2) R1123 and (3) R32 is 30 wt% or less, and (3) R32 is (2) R1123 It is desirable to mix more than the mixing ratio.

For example, a mixed refrigerant with 70 wt% CO 2, 15 wt% R 1123, and 15 wt% R 32 can have a GWP of about 100, which is sufficiently smaller than a conventional HFC refrigerant, and has a flammability rank. It is a refrigerant suitable for heating (heating) applications that can be an A1 refrigerant and can suppress the disproportionation reaction of R1123.

<Modification 2>
In the above embodiment, although it demonstrated as a refrigerating cycle suitable for a vending machine, you may comprise a refrigerating cycle as FIG. 2 shows, for example. The refrigeration cycle apparatus shown in FIG. 2 mainly includes a compressor 61, a radiator 62, a decompressor 63, and an evaporator 64, and these devices are connected by a pipe so that a mixed working fluid circulates.

  If the radiator 62 is configured so that the mixed working fluid and water flow in opposition, it is suitable as a heat pump water heater that heats water to a temperature of 65 ° C. or higher.

  Further, if the radiator 62 is configured to heat water mixed with an antifreeze such as propylene glycol, it is suitable as a hot water heater.

  As described above, since the refrigeration cycle apparatus according to the present invention can improve the refrigeration performance during heating (heating) operation, it is used for vending machines, heat pump water heaters, car air conditioner units, air conditioners, dehumidifiers, and the like. It can also be applied to.

2 First cooling chamber (hot / cold switching product storage room)
3 Second cooling greenhouse (hot / cold switching product storage room)
4 Cooling room (cold product storage room)
5 Refrigeration cycle 7, 61 Compressor 9 Gas cooler 13 First solenoid valve (open / close valve)
14 Second solenoid valve (open / close valve)
15 3rd solenoid valve (open / close valve)
19 1st evaporator 20 2nd evaporator 21 3rd evaporator 34 1st electric heater (heating part)
35 Second electric heater (heating unit)
40 controller 62 radiator 63 decompressor 64 evaporator 100 vending machine

Claims (4)

It is equipped with a refrigeration cycle used for heating applications with a compressor, radiator, decompressor, and evaporator connected.
As a refrigerant of the refrigeration cycle, carbon dioxide and 1,1,2-trifluoroethylene are included, the carbon dioxide is 70% by weight or more, and the 1,1,2-trifluoroethylene is 30% by weight or less. A refrigeration cycle apparatus using a mixed working fluid. It is equipped with a refrigeration cycle used for heating applications with a compressor, radiator, decompressor, and evaporator connected.
The refrigerant of the refrigeration cycle includes carbon dioxide, 1,1,2-trifluoroethylene and difluoromethane, the carbon dioxide is 70% by weight or more, and the 1,1,2-trifluoroethylene and the difluoro The refrigeration cycle apparatus, wherein the sum of methane is 30% by weight or less, and the weight% of the difluoromethane is not less than 1% by weight of the 1,1,2-trifluoroethylene. The refrigeration cycle according to claim 1, further comprising a plurality of product storage chambers, wherein the evaporator is disposed in parallel in each of the product storage chambers, and the radiator is disposed in at least one of the product storage chambers. apparatus. The refrigeration cycle apparatus according to claim 1 or 2, wherein a heat medium mainly composed of water is heated by the radiator.