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Refrigeration cycle device

a technology of refrigerating cycle and apparatus, which is applied in the direction of refrigeration components, compression machines with several condensers, light and heating apparatus, etc., can solve the problems of high cost and achieve the effect of suppressing disproportionation and high composition ratio

Inactive Publication Date: 2017-03-23
MITSUBISHI ELECTRIC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about a refrigeration system that uses two different refrigerants, one of which has a higher boiling point than usual. The system separates out this excess refrigerant and stores it in a separate tank. This results in a refrigerant mixture that prevents the first refrigerant from becoming unevenly distributed and causes disproportionation. By using this mixture, the system is designed to prevent the first refrigerant from becoming unevenly distributed and causing problems with the refrigeration process.

Problems solved by technology

However, such a refrigerant has a high boiling point with low performance and thus keeping the same performance as that of the related art may cause many technical problems resulting in high cost.

Method used

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first embodiment

[0021]The configuration of a refrigeration cycle apparatus will be first discussed below.

[0022]FIG. 1 is a schematic diagram of the refrigeration cycle apparatus according to a first embodiment.

[0023]As shown in FIG. 1, the refrigeration cycle apparatus according to the first embodiment has a refrigeration cycle including a compressor 1, a first condenser 2, a liquid separator 3, a second condenser 4, a refrigerant heat exchanger 5, a first expansion valve 6, and an evaporator 7 that are sequentially connected via a refrigerant pipe serving as a main passage 8. A gas outlet 3a provided to an upper part of the liquid separator 3 is connected to the second condenser 4.

[0024]A liquid outlet 3b provided to a lower part of the liquid separator 3 is connected to the compressor 1 via a bypass 9. The bypass 9 is connected to an intermediate pressure part (an intermediate pressure between a high pressure and a low pressure, will be referred to as a medium pressure) in a compression chamber. ...

second embodiment

[0055]The configuration of a refrigeration cycle apparatus will be first described below.

[0056]The working refrigerant of the refrigeration cycle apparatus according to a second embodiment is identical to that of the first embodiment and thus differences in configuration will be discussed below.

[0057]FIG. 3 is a schematic diagram of the refrigeration cycle apparatus according to the second embodiment.

[0058]The refrigeration cycle apparatus according to the second embodiment has a refrigeration cycle including a compressor 11, an oil separator 12, a four-way valve 13, an exterior heat exchanger 14, an exterior expansion valve 15, interior expansion valves 16, interior heat exchangers 17, the four-way valve 13, and an accumulator 18 that are sequentially connected. The interior expansion valves 16 and the interior heat exchangers 17 are connected in parallel. A gas outlet 12a of the oil separator 12 is connected to the four-way valve 13. An oil return port 12b of the oil separator 12 ...

third embodiment

[0085]The configuration of a refrigeration cycle apparatus will be first described below.

[0086]The working refrigerant of the refrigeration cycle apparatus according to a third embodiment is identical to that of the first embodiment and thus differences in configuration will be discussed below.

[0087]FIG. 4 is a schematic diagram of the refrigeration cycle apparatus according to the third embodiment.

[0088]As shown in FIG. 4, the refrigeration cycle apparatus according to the third embodiment includes a compressor 30, a four-way valve 31, a user-side heat exchanger 32, a subcooler 33, an expansion valve 34 acting as a first decompression device, and a heat-source-side heat exchanger 35. These components are sequentially connected via refrigerant pipes and are stored in a refrigeration cycle unit 100.

[0089]A component separation circuit includes a refrigerant rectifier 40 acting as a component separating unit, a refrigerant reservoir 41 for retaining refrigerant, a first cooler 42, a s...

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Abstract

A refrigeration cycle apparatus operating with standard composition refrigerant that is a zeotropic refrigerant mixture containing at least first refrigerant and second refrigerant having a higher boiling point than the first refrigerant at the same pressure, the refrigeration cycle apparatus including a main circuit in which a compressor, a first heat exchanger, an expansion valve, and a second heat exchanger are sequentially connected, and a component separation circuit connected to the main circuit, the first refrigerant having a property of disproportionation, the component separation circuit being configured to separate and store, from the main circuit, mixed refrigerant containing the first refrigerant having a higher composition ratio than in the standard composition refrigerant in an operation of a separation-storage mode separating the components of the standard composition refrigerant.

Description

TECHNICAL FIELD[0001]The present invention relates to a refrigeration cycle apparatus in which a zeotropic refrigerant mixture is used as working refrigerant.BACKGROUND ART[0002]Low-GWP refrigerants have been recently developed to suppress the influence of global warming. Conventionally used R410A is a refrigerant with good performance but has a GWP (global warming potential) of about 2000. Thus, R410A has been replaced with R32 having a GWP one third that of R410. R32 is a good-performance refrigerant with physical properties relatively similar to those of R410A and has a GWP of about 600. To achieve lower GWPs, fluoropropene (HFO) refrigerants such as HFO1234yf have been developed. However, such a refrigerant has a high boiling point with low performance and thus keeping the same performance as that of the related art may cause many technical problems resulting in high cost.[0003]Accordingly, a refrigeration cycle apparatus has been proposed in which a low-GWP refrigerant (e.g., H...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25B43/00F25B31/00F25B41/06F25B6/04F25B13/00
CPCF25B43/00F25B6/04F25B13/00F25B41/067F25B31/004F25B2600/2513F25B43/006F25B2400/05F25B2400/121F25B2400/23F25B2341/0661F25B41/062F25B2400/13F25B41/34F25B41/24Y02B30/70F25B41/385
Inventor SHIMAZU, YUSUKE
Owner MITSUBISHI ELECTRIC CORP
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