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Refrigeration cycle device

A refrigeration cycle and refrigerant technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of complex switching control, complex circuit structure, etc.

Inactive Publication Date: 2020-04-17
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] According to the study of the inventors of the present application, as in Patent Document 1, when a plurality of heat exchangers are provided and the same heat exchanger (in Patent Document 1, an outdoor heat exchanger) is switched to a radiator and In the refrigeration cycle device of any of the heat absorbers, since a pressure regulating valve and a switching valve are required in the refrigerant circuit, the circuit structure becomes complicated
In addition, since it is necessary to obtain an appropriate cycle balance in each operation mode, complicated control is required for switching.

Method used

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Comparison scheme
Effect test

no. 1 approach

[0054] First, refer to Figure 1 ~ Figure 3 A first embodiment of the present invention will be described. The refrigeration cycle device 10 of the first embodiment is applied to a vehicle air conditioner 1 mounted on an electric vehicle that obtains driving force for vehicle running from a running motor.

[0055] In the vehicle air conditioner 1 , the refrigeration cycle device 10 functions to adjust the temperature of the blown air blown into the vehicle interior, which is a space to be air-conditioned. This blown air corresponds to the heat exchange object fluid in this invention.

[0056]In addition, the vehicle air conditioner 1 can realize a plurality of operation modes by switching the refrigerant circuit according to the operation mode. The plurality of operation modes include a cooling mode, a heating mode, a dehumidification and heating mode, and the like.

[0057] The cooling mode is an operation mode for cooling the blown air to cool the vehicle interior, and is...

no. 2 approach

[0184] Next, refer to Figure 4 A second embodiment different from the first embodiment described above will be described. In addition, in Figure 4 In , the same reference numerals are attached to the same or corresponding parts as those of the first embodiment. This also applies to the following drawings.

[0185] Similar to the first embodiment, the refrigeration cycle device 10 of the second embodiment is applied to a vehicle air conditioner 1 mounted on an electric vehicle, and functions to adjust the temperature of blown air blown into the vehicle interior as a space to be air-conditioned.

[0186] Such as Figure 4 As shown, the vehicle air conditioner 1 of the second embodiment includes a refrigeration cycle device 10 , a high-temperature-side heat medium circuit 20 , and an indoor air-conditioning unit 50 as in the first embodiment.

[0187] The structures of the high-temperature-side heat medium circuit 20 and the indoor air-conditioning unit 50 in the second emb...

no. 3 approach

[0265] Next, refer to Figure 6 A third embodiment different from the above-described embodiments will be described. The refrigeration cycle device 10 of the third embodiment is applied to the vehicle air conditioner 1 mounted on an electric vehicle as in the above-mentioned embodiments, and functions to adjust the temperature of the blown air blown into the vehicle interior as a space to be air-conditioned.

[0266] Such as Figure 6 As shown, in the vehicle air conditioner 1 of the third embodiment, the high temperature side water-refrigerant heat exchanger 12, the high temperature side heat medium circuit 20, etc. The exchanger 12b serves as a heating unit.

[0267] Therefore, in the third embodiment, the indoor condenser 12a and the outdoor heat exchanger 12b function as the heating unit in the present invention. The structure of the third embodiment is basically the same as that of the first embodiment except this point.

[0268] An indoor condenser 12a is connected t...

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Abstract

A refrigeration cycle device (10) is configured so as to have a compressor (11), a high-temperature-side water-refrigerant heat exchanger (12), a branch unit (14a), an expansion valve (15a) for cooling, an expansion valve (15b) for heat absorption, an indoor evaporator (16) and an outdoor evaporator (18). The expansion valve (15a) for cooling and the indoor evaporator (16) are connected to one refrigerant outlet of the branch unit (14a), and the expansion valve (15b) for heat absorption and the outdoor evaporator (18) are connected to the other refrigerant outlet of the branch unit. In a cooling mode, the device is switched to a refrigerant circuit in which refrigerant that has been decompressed in the expansion valve (15a) for cooling is made to exchange heat with the blown air in the indoor evaporator (16), and in a heating mode, the device is switched to the refrigerant circuit in which refrigerant that has been decompressed in the expansion valve (15b) for heat absorption is made to exchange heat in the outdoor evaporator (18), thereby absorbing heat from the outside air and heating the blown air.

Description

[0001] Cross-references to related applications [0002] This application is based on the JP Patent application 2017-187648 for which it applied on September 28, 2017, The content of this indication is incorporated in this application by reference. technical field [0003] The invention relates to a refrigeration cycle device. Background technique [0004] Conventionally, the technology described in Patent Document 1 is known as a technology related to a vapor compression refrigeration cycle device applied to an air conditioner. [0005] The refrigeration cycle of Patent Document 1 is configured to be able to reheat the cooled and dehumidified blown air in accordance with the cooling mode for cooling the blown air blown into the vehicle interior which is the space to be air-conditioned by the device, and the heating mode for heating the blown air. The dehumidification heating mode and other operation modes can be used to switch the refrigerant circuit and so on. [0006] F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B5/02B60H1/22F25B1/00F25B5/04F25B29/00
CPCB60H1/22F25B1/00F25B5/02F25B5/04F25B29/00F25B39/04
Inventor 牧本直也加藤吉毅布施卓哉
Owner DENSO CORP
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