Air conditioning system and control method

Abstract

The invention provides an air conditioning system and a control method. The air conditioning system comprises a compressor (1), an evaporator (2), a condenser (3), a throttling device (4) and a firstfour-way valve (5), wherein one of two connecting ends of the first four-way valve (5) communicates with an air suction port of the compressor (1), the other one of the two connecting ends of the first four-way valve (5) communicates with an exhaust port of the compressor (1), and the first four-way valve (5) can be controlled to communicate with the two connecting ends after the air conditioningsystem is shut down, so that the air suction port of the compressor (1) communicates with the exhaust port. According to the air conditioning system, the two ends are controlled to communicate after the air conditioning system is shut down, so that the air suction port of the compressor effectively communicates with the exhaust port, the contact of the compressor with an outside pipeline is closed, refrigerant is prevented from continuously transferring to enter the compressor, the condition of low insulation resistance when the air conditioning system is turned on is avoided, and the system failure rate is reduced.

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. Background technique [0002] For ordinary split-type air conditioners, the compressor is vertical, and the plug-in terminals of the live body in the compressor and the motor are located on the top of the compressor. As long as the whole machine is well grounded, the insulation resistance of the system can meet the requirements. [0003] However, for bus air conditioners, car air conditioners, and air-conditioning systems that must use horizontal compressors, the refrigerant in the air-conditioning system migrates into the compressor, flooding the live and exposed winding plug-in terminals and winding solder joints in the compressor. When the system is turned on and powered on, these charged bodies exposed in the compressor are short-circuited with the inner wall of the compressor shell through the liquid refri...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art, especially in the horizontal compressor air conditioner, that the refrigerant migrates into the compressor after shutdown, flooding the live and exposed winding plug-in terminals and winding solder joints in the compressor. and other parts lead to the defect that the insulation resistance is too low when the whole machine is turned on, thereby providing an air conditioning system and a control method

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