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

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Problems solved by technology

In addition, the most popular household air conditioner with a rotary compressor must consider the cost increa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0064] [Example 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 sealed 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 the condensed refrigerant in the indoor heat exchanger 100. After that, the pressure is reduced by the first expansion valve 102a. The liquid separator 108 is separated into a medium-pressure gas refrigerant (pressure Pi) and a liquid refrigerant. Therefore, the supercooling of the liquid refrigerant increases.

[0066] The liquid refrigerant continues to pass through the second expansion valve 102b to reduce pressure and becomes a low-pressure gas refrigerant (pressure PS) in the outdoor heat exchanger 110. After that, it passes through the four-way valve 105 and the accumulator 107, and is connec...

Example Embodiment

[0079] [Example 2]

[0080] From the viewpoint of the comfort and energy efficiency of air conditioners within one year, there are product plans that do not use gas refrigerant injection in either heating mode or cooling mode, or products that suspend gas refrigerant injection during operation by selecting the mode Planning. In addition, it is necessary to stop the gas refrigerant injection in a state such as late-night operation and dehumidification operation with a small air-conditioning load, or low-load operation after the room temperature has stabilized. As a means to achieve its purpose, the second embodiment is related to the stop or release stop technique of the compression action of the second cylinder 10b with a small displacement.

[0081] First, the design changes of Example 2 compared with Example 1 will be described. Figure 4 Shown is a cross-sectional view of the compression element 140. In the second embodiment, a magnet 16 is provided at the rear end of the secon...

Example Embodiment

[0084] [Example 3]

[0085] Picture 9 The illustrated embodiment 3 is another application of the embodiment 2, which can be used when the gas refrigerant injection is stopped regardless of the heating mode or the cooling mode state. In the third embodiment, the rotary compressor 120 is used as in the second embodiment. 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 Picture 9 As shown, the three-way valve 116 is respectively connected to the intermediate 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 intermediate pressure can be selectively sucked through the three-way valve 116 The pipe 5 is in communication with the refrigerant delivery pipe 103. At this time, one end of the pipeline connecting the three-way valve 116 between the exhaust pipe 3 and the four-way valve 105 is closed. Furthermore, the gas re...

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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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