Control method of double-cylinder variable-capacity compressor air conditioning system

Abstract

The invention belongs to the field of air conditioning systems, particularly relates to a double-cylinder variable-capacity compressor air conditioning system and a control method thereof. The air conditioning system comprises a large-cylinder circulation loop and a small-cylinder signal loop, wherein the large-cylinder circulation loop is formed by connecting a variable-capacity compressor, a first three-way pipe, a four-way selector valve, an outdoor heat exchanger, a throttle mechanism, an indoor heat exchanger and a second three-way pipe in sequence, and the small-cylinder signal loop is formed by connecting the variable-capacity compressor, the first three-way pipe and the three-way selector valve in sequence. In the control method of the double-cylinder variable-capacity compressor air conditioning system, the opening and the closing of the small-cylinder signal loop are controlled by the switch on / off condition of the three-way selector valve, thereby realizing reliable and active control for a small cylinder of an air conditioner, ensuring the operation of the air conditioner and bringing about good comfort to users; in addition, frost on the outdoor heat exchanger can be removed faster and more completely in the automatic defrosting process, and therefore, users feel more comfortable.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to an air conditioning system and a control method thereof with double-cylinder variable capacity compressors. Background technique [0002] In recent years, the method of changing the number of rotations of motors through frequency conversion technology to improve air conditioning capacity control and energy efficiency has become popular. However, this method of frequency conversion technology has high technical difficulty in application, and the decrease in reliability and cost caused by increasing the number of electronic components controlled Disadvantages of being tall. In order to solve this problem, Samsung, Meizhi and other companies have developed a double-cylinder rotary compressor with advantages in control and cost (such as the double-cylinder rotary compressor announced by zl200610122631.6, zl200910039449.8, zl200910039449.8 Rotary compressor), how...

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Problems solved by technology

[0002] In recent years, the method of changing the number of rotations of motors through frequency conversion technology to improve air conditioning capacity control and energy efficiency has become popular. However, this method of frequency conversion technology has high technical difficulty in application, and the decrease in reliability and cost caused by increasing the number of electronic components controlled Disadvantages of being taller

In order to solve this problem, companies such as Samsung and Meizhi have developed a double-cylinder rotary compressor with advantages in control and cost (such as the double-cylinder rotary compressor announced by zl200610122631.6, zl200910039449.8, zl200910039449.8 Rotary compressor), however, at present, more studies are aimed at the innovation of the structure of the double-cylinder variable-capacity compressor and the control of the compressor body, how to use the double-cylinder variable-capacity compressor to form an air-conditioning system and how to efficiently implement the air-conditioning system Reasonable controls are currently blank

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