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Refrigeration cycling device

A circulation device and switching device technology, applied in the direction of reversible cycle compressors, refrigerators, refrigeration components, etc., can solve the problems of cost increase, gas refrigerant popularization restrictions, etc., to reduce expansion loss, simple structure, improve heating effect of ability

Inactive Publication Date: 2014-02-05
GUANGDONG MEIZHI COMPRESSOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the most popular household air conditioner with a rotary compressor must consider the cost increase
Therefore, the application and popularization of gas refrigerant injection in rotary compressors is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] figure 1 The illustrated two-cylinder rotary compressor 120 is composed of an inverter-type motor unit 130 whose rotation speed can be changed on a hermetic casing 2 , and a compression element 140 arranged under the motor unit 130 . The high-pressure gas refrigerant (pressure Pd) discharged from the exhaust pipe 3 passes through the four-way valve 105 and becomes a condensed refrigerant in the indoor heat exchanger 100. After that, it is decompressed by the first expansion valve 102a, and the liquid refrigerant in the gas The liquid separator 108 is separated into medium-pressure gas refrigerant (pressure Pi) and liquid refrigerant. Therefore, the subcooling of the liquid refrigerant increases.

[0066] The liquid refrigerant continues to decompress through the second expansion valve 102b, and becomes a low-pressure gas refrigerant (pressure PS) in the outdoor heat exchanger 110, and then passes through the four-way valve 105 and the liquid reservoir 107 to connect wi...

Embodiment 2

[0080] From the viewpoint of the comfort and energy efficiency of the air conditioner for a year, there are product plans that do not use gas refrigerant injection in either the heating mode or the cooling mode, or there are products that suspend gas refrigerant injection during operation by selecting a mode planning. In addition, it is necessary to stop gas refrigerant injection during late night operation and dehumidification operation with a small air-conditioning load, or low-load operation after the room temperature stabilizes. As a means to achieve the purpose, Embodiment 2 is concerned with the technique of stopping or releasing the compression action of the second cylinder 10b having a small displacement.

[0081] First, design changes of the second embodiment as compared with the first embodiment will be described. Figure 4 What is shown is a cross-sectional view of the compression element 140, and embodiment 2 is equipped with a magnet 16 at the rear end of the sec...

Embodiment 3

[0085] Figure 9 The illustrated embodiment 3 is another application of the embodiment 2, which can be used when the injection of gas refrigerant is stopped no matter in the heating mode or the cooling mode. Embodiment 3 uses the rotary compressor 120 like Embodiment 2. Among them, the first two-way valve 106a and the second two-way valve 106b are omitted, and a three-way valve 116 is added.

[0086] Such as Figure 9 As shown, the three-way valve 116 is respectively connected to the medium-pressure suction pipe 5, the refrigerant delivery pipe 103 and the pipeline between the exhaust pipe 3 and the four-way valve 105, and the medium-pressure suction pipe 116 can be selectively used The pipe 5 communicates with the refrigerant conveying pipe 103, and at this moment, one end of the pipe connecting the three-way valve 116 between the exhaust pipe 3 and the four-way valve 105 is closed. Furthermore, the gas refrigerant (pressure Pi) in the gas-liquid separator 108 flows into t...

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PUM

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Abstract

The invention discloses a refrigeration cycling device comprising a double-cylinder rotary compressor, a liquid accumulator, an indoor heat exchanger, an outdoor heat exchanger, a gas-liquid separator and a medium-pressure gas suction pipe. The double-cylinder rotary compressor comprises a shell provided with an exhaust pipe, a motor and a compression device, the compression device comprises a first cylinder provided with a first compression cavity and a first silencer and a second cylinder provided with a second compression cavity and a second silencer, and the first silencer and the second silencer are communicated with the exhaust pipe; the liquid accumulator is connected to the first compression cavity through a low-pressure gas suction pipe; the gas-liquid separator is connected between the indoor heat exchanger and the outdoor heat exchanger; the medium-pressure gas suction pipe is connected between the second compression cavity and the gas-liquid separator. The refrigeration cycling device is simple in structure, and refrigerating capacity is enhanced and efficiency is improved.

Description

technical field [0001] The present invention relates to a refrigerating cycle device of a gas refrigerant injection type rotary compressor applied to air conditioners, refrigerators and the like. Background technique [0002] At present, the heating technology of air conditioners, especially the improvement of the heating capacity in low outside air temperature, has been a difficult subject for many years even in principle. [0003] In order to solve this problem, in recent years, the application of gas refrigerant injection method to compressors and refrigeration cycles has attracted more attention, especially the research on the characteristics of double-cylinder rotary compressors has made progress. However, further improvement in heating efficiency is desired. In addition, the most popular household air conditioner with a rotary compressor must consider the cost increase. Therefore, the application and popularization of the gas refrigerant injection type in the rotary ...

Claims

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Application Information

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IPC IPC(8): F25B13/00F25B31/02
Inventor 小津政雄杨国用王玲
Owner GUANGDONG MEIZHI COMPRESSOR
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