What is the significance of the central air-conditioning electronic expansion valve to the central air-conditioning refrigerant? _Maintenance

　　【】The role of electronic expansion valve to adjust the flow rate The central air-conditioning electronic expansion valve controls the opening of the valve by sensing the change in the refrigerant superheat at the outlet of the evaporator through the temperature sensor, thereby adjusting the refrigerant flow into the evaporator. Make the refrigerant flow in the copper tube match the heat load of the evaporator. When the heat load of the evaporator increases, the opening degree of the central air-conditioning electronic expansion valve will also increase, that is, the refrigerant flow rate will also increase, and vice versa, the refrigerant flow rate will decrease.

The function of 　　 electronic expansion valve controls the degree of superheat. The central air-conditioning electronic expansion valve has the function of controlling the superheat of the refrigerant at the outlet of the evaporator. This function of controlling the superheat can ensure the sufficient heat transfer area of u200bu200bthe evaporator Utilization can also prevent the occurrence of accidents that are accompanied by liquid hammer damage to the compressor during suction, so that the central air-conditioning compressor has a longer service life.

The role of the electronic expansion valve is the 'throttle and depressurization' central air-conditioning electronic expansion valve, which can change the saturated liquid of the normal temperature and high pressure refrigerant into the low temperature and low pressure refrigerant liquid and produce a little flash gas. The pressure is reduced, and the purpose of absorbing heat to the outside is realized, and the heat in the absorbed room can be accurately reached. The function of the electronic expansion valve is to control the evaporative liquid level. The electronic expansion valve of the central air-conditioning controls the opening of the valve by sensing the change in the superheat of the refrigerant at the outlet of the evaporator, thereby adjusting the refrigerant flow into the evaporator to make it copper. The flow of refrigerant in the tube matches the heat load of the evaporator. When the heat load of the evaporator increases, the opening degree of the central air-conditioning electronic expansion valve will also increase, that is, the refrigerant flow rate will also increase, and vice versa, the refrigerant flow rate will decrease.

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