Four-way valve, air conditioning unit and control method

Abstract

The invention provides a four-way valve, an air conditioner unit and a control method, including a main valve body, a valve chamber is arranged in the main valve body, a valve core is arranged in the valve chamber, and a The D communication port, the E communication port, the S communication port and the C communication port connected to the valve chamber. The four-way valve, the air conditioner unit and the control method provided by the present invention, by changing the four-way valve to have a third position, can close the E communication port, and then close the shell side of the evaporator, effectively preventing the refrigerant from being affected by the inertia It enters the gas-liquid separator through the E communication port, and the refrigerant is sealed in the shell side, and there is heat exchange with the water inside the heat exchange tube in the evaporator. Under low temperature conditions, water condensation in the heat exchange tube is avoided. Frozen cracked heat exchange tubes.

Description

technical field [0001] The invention relates to the technical field of air-conditioning equipment, in particular to a four-way valve, an air-conditioning unit and a control method. Background technique [0002] When the flooded shell-and-tube unit is cooling or heating, it is adjusted by changing the connection mode of the connection port of the four-way valve. There is an inertial process when the unit is shut down, which causes the refrigerant to migrate from the shell tube to the gas-liquid separator in a large amount, which will cause the compressor suction port to suck in a large amount of refrigerant from the gas-liquid separator when the unit is restarted, resulting in a large amount of compressor suction. liquid problem. Contents of the invention [0003] In order to solve the above technical problems, a four-way valve, an air conditioning unit and a control method are provided to prevent the refrigerant from migrating in large quantities into the gas-liquid separ...

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Problems solved by technology

[0002] When the flooded shell-and-tube unit is cooling or heating, it is adjusted by changing the connection mode of the connection port of the four-way valve. There is an inertial process at the moment when the unit is shut down, which causes a large amount of refrigerant to migrate from the shell tube to the gas-liquid separator, which will cause the compressor suction port to suck in a large amount of refrigerant from the gas-liquid separator when the unit is restarted, resulting in a large amount of compressor suction. liquid problem

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