Capacity variable rotary compressor and air-conditioning circulatory system

Abstract

The invention discloses a capacity variable rotary compressor containing a first compressing chamber selectively compressing and idling a coolant and a second compressing chamber compressing coolant, and an air-conditioning circulatory system arranged with the compressor. The capacity variable rotary compressor comprises a first vane, wherein when the first vane moves forwards, the first compressing chamber compresses the coolant, and when the first vane moves backwards, the first compressing chamber idles; a vane control unit selectively connecting back of the first vane and one of the high-pressure side and low-pressure side of the air-conditioning circulatory system; a counter flow preventing unit for preventing coolant of the second compressing chamber from flowing back to a suction side of the air-conditioning circulatory system through the first compressing chamber when the first compressing chamber idles, and preventing coolant from flowing back to a liquid storing tank throughthe first compressing chamber when the first compressing chamber idles.

Description

technical field [0001] The present invention relates to a variable-capacity rotary compressor and an air-conditioning cycle system equipped with the compressor, in particular to a compressor capable of selectively compressing and idling refrigerant in one of a pair of compression chambers. A variable capacity rotary compressor that changes capacity and an air conditioning cycle system equipped with the compressor. Background technique [0002] Generally, a rotary compressor is a device applied to an air conditioning cycle system to compress refrigerant. Recently, there is a capacity-changing variable-capacity rotary compressor that can effectively cope with various cooling loads. [0003] Korean Laid-Open Patent No. 10-2008-0016349 discloses a conventional variable capacity rotary compressor. Such existing variable capacity rotary compressors such as figure 1 As shown, a drive device 20 that generates a rotational force in the airtight container 10 and a compression devic...

AI Technical Summary

Problems solved by technology

[0006] However, for this existing variable capacity rotary compressor, in order to be able to rotate the rotating shaft and the first and second roller rings, the components of the compression device are separated by a small distance, so that when the first When the compression chamber is idling and is in a low-pressure state, a part of the high-temperature and high-pressure refrigerant compressed in the second compression chamber flows back to the liquid storage tank through the gap between the above-mentioned separated components. The mixture of high-temperature and high-pressure refrigerant countercurrently flowing in the second compression chamber will heat the refrigerant inside the liquid storage tank, resulting in a decrease in the density of the refrigerant and an increase in volume, thereby reducing the amount of refrigerant sucked into the second compression chamber, resulting in possible Decreased performance of variable capacity rotary compressors

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