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Refrigeration cycle device

A circulation device and refrigerant technology, applied in the direction of irreversible cycle compressors, refrigerators, refrigeration components, etc., can solve problems such as corrosion of metal components, and achieve the effect of inhibiting decomposition reactions

Inactive Publication Date: 2022-05-06
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, as described in Patent Document 1 (International Publication No. 2015 / 060407) and Patent Document 2 (Japanese Patent Laid-Open No. 2016-56340 ), refrigerants having carbon-carbon double bonds such as unsaturated halogenated hydrocarbons produces acid when broken down
Due to this acid, there is a problem that corrosion of metal members etc. constituting the refrigerant circuit occurs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] (refrigerant circuit)

[0029] figure 1 It is a schematic diagram showing an example of the refrigerant circuit of the refrigeration cycle apparatus of this embodiment. As far as refrigeration cycle equipment is concerned, such as figure 1 As shown in , it has: outdoor unit 1, indoor unit 2, etc. The outdoor unit 1 and the indoor unit 2 are connected using a liquid pipe 8 and a gas pipe 9 .

[0030] The outdoor unit 1 includes a compressor 3, a condenser 5, an outdoor blower 5a, and the like, and the compressor 3 and the condenser 5 are connected by piping. The indoor unit 2 includes an expansion valve 6, an evaporator 7, an indoor blower 7a, and the like, and the expansion valve 6 and the evaporator 7 are connected by piping.

[0031] The compressor 3 of the outdoor unit 1 and the evaporator 7 of the indoor unit 2 are connected by a gas pipe 9 . The condenser 5 of the outdoor unit 1 and the expansion valve 6 of the indoor unit 2 are connected by a liquid pipe 8 . ...

Embodiment approach 2

[0074] In this embodiment, at least a part of the surface of the copper-containing member is coated with a coating material that is inactive to the halogenated hydrocarbon, that is, a coating material that does not contain copper, so that at least a part of the surface of the copper-containing member does not Refrigerant contact. The other points are the same as those in Embodiment 1, and thus redundant descriptions are omitted.

[0075] The coating material not containing copper is not particularly limited as long as it does not contain copper, and examples thereof include hard materials, resin materials, and the like. In addition, when at least a part of the surface of the copper-containing member is coated with the coating material, the coating material is coated to such an extent that the surface of the copper-containing member to be coated is not exposed.

[0076] Examples of hard materials include tin, nickel, chromium, aluminum, iron, molybdenum, graphite, diamond-like...

Embodiment approach 3

[0088] The surface of the copper wire used as wiring in the motor 13 of the compressor 3 is covered with the above-mentioned covering material. Furthermore, as the bearing 20a, a member whose surface copper is not exposed is used. The other points are the same as those in Embodiment 2, and thus redundant descriptions are omitted.

[0089] As a result, the reaction between the halogenated hydrocarbon and copper is suppressed, the decomposition of the refrigerant is suppressed (performance degradation), and the deterioration of the components of the compressor 3 is also suppressed. As a result, performance degradation of the refrigeration cycle apparatus is suppressed.

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Abstract

This refrigeration cycle device is provided with a refrigerant circuit (100) in which a refrigerant containing a halogenated hydrocarbon circulates, and is characterized in that the halogenated hydrocarbon has at least one of a C-I bond, a C-Br bond, and a C-Cl bond and does not have a double bond, and at least one of the members constituting the refrigerant circuit (100) is a copper-containing member. At least a portion of the surface of the copper-containing member is not in contact with the refrigerant.

Description

technical field [0001] The present invention relates to refrigeration cycle devices. Background technique [0002] Currently, refrigerants used in refrigeration cycle devices are regulated by, for example, the Freon Emission Control Act (enacted in April 2015). Specifically, the upper limit of the GWP (Global Warming Potential: Global Warming Potential) value of the refrigerant used is limited. Therefore, refrigerants with lower GWP values ​​are required. [0003] As refrigerants with a low GWP value, for example, unsaturated halogenated hydrocarbons including hydrofluoroolefins (HFO) or hydrochlorofluoroolefins (HCFO) having a carbon-carbon double bond are being studied. [0004] However, as described in Patent Document 1 (International Publication No. 2015 / 060407) and Patent Document 2 (Japanese Patent Laid-Open No. 2016-56340 ), refrigerants having carbon-carbon double bonds such as unsaturated halogenated hydrocarbons Acids are produced on decomposition. Due to this ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F25B49/02
CPCF25B1/00F25B9/002C09K5/044F25B41/40
Inventor 平塚研吾外山悟小岛健嗣小山修平
Owner MITSUBISHI ELECTRIC CORP