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Refrigeration cycle device

A technology of circulation device and circulation direction, which is applied in the direction of fluid circulation arrangements, compressors with reversible circulation, refrigerators, etc., can solve the problems of the lack of development of the application of micro-flammable refrigerants, etc., to prevent malfunctions, reduce the amount of production, The effect of suppressing deterioration

Pending Publication Date: 2022-06-24
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on this background, the application of low-GWP slightly flammable refrigerants has not been developed in air conditioners such as multi-connected air conditioners (multi-room air conditioners) for high-rise buildings. The current situation is to use R410A

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0206] The refrigeration cycle apparatus of Example 1 and the refrigeration cycle apparatus of Comparative Example 1 were operated for 3000 hours. Then, the refrigerant piping between the compressor and the four-way valve was cut, the inner surface was cut out, and the state of generation and adhesion of the deterioration product was observed with a scanning electron microscope.

[0207] Figure 4 It is a scanning electron microscope image of the surface after the durability test of the refrigerant piping connected to the discharge side of the compressor was observed.

[0208] like Figure 4 As shown, in Example 1 in which the refrigerant piping between the compressor and the four-way valve was a stainless steel pipe, almost no product was found on the inner surface of the stainless steel pipe after the durability test. On the other hand, in Comparative Example 1 in which the refrigerant piping between the compressor and the four-way valve was a copper pipe, adhesion of a la...

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Abstract

The invention provides a refrigeration cycle device capable of reducing the generation amount of copper iodide generated by the reaction of a refrigerant and preventing the malfunction of equipment for a long period of time. A refrigeration cycle device is provided with: a compressor that compresses a refrigerant; a four-way valve for switching the circulation direction of the refrigerant compressed by the compressor; a condenser that condenses the refrigerant flowing out from the four-way valve; a pressure reducer for reducing the pressure of the refrigerant condensed by the condenser; and an evaporator that evaporates the refrigerant decompressed by the decompressor, in which the refrigerant is a mixed refrigerant containing trifluoroiodomethane, and the vapor pressure at 25 DEG C is 1.1-1.8 MPa (inclusive). The compressor is a hermetic electric compressor provided with a compression mechanism part and a motor for driving the compression mechanism part in a hermetic container and filled with a refrigerator oil for lubricating the sliding part, and the refrigerator oil is polyol ester oil having a total acid value of 0.1 mgKOH / g or less. The refrigerant piping in a section in which the refrigerant becomes a high temperature of 70 DEG C or higher during the operation of the refrigeration cycle is a steel pipe, a stainless steel pipe, an aluminum pipe, or an aluminum alloy pipe.

Description

technical field [0001] The present invention relates to a refrigeration cycle apparatus using a refrigerant having a small global warming potential (GWP). Background technique [0002] Today, in order to prevent global warming, various countermeasures against climate change have been taken internationally. At the 21st Conference of the Parties to the Framework Convention on Climate Change (COP21) held in 2015, the Paris Agreement was adopted and the long-term goals to be achieved in the future were determined. The purpose of the Paris Agreement is to pursue efforts to keep the rise in the global average temperature sufficiently lower than 2°C and suppress it to 1.5°C compared to before the Industrial Revolution. [0003] In Japan, method maintenance for preventing global warming associated with fluorine compounds continues to develop. Regarding the use and management of fluorine-based refrigerants used in refrigerating and air-conditioning equipment, the "Law on the Ration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B13/00F25B31/00F25B41/00F25B41/20C09K5/04C10M169/04F04B39/02
CPCF25B13/00F25B41/20F25B41/00F25B31/002C09K5/044C10M169/048F04B39/023F04B39/0215C10M2207/283C10M2223/041C10M2223/04C10M2207/026C10M2207/042C10N2040/30
Inventor 太田亮内藤宏治多田修平
Owner HITACHI JOHNSON CONTROLS AIR CONDITIONING INC