Solenoid valve control method for heat pump air conditioning system

Abstract

The invention provides a solenoid valve control method for a heat pump air-conditioning system, which solves the noise problem caused by refrigerant impact in the prior art by optimizing the control strategy of the existing heat pump air-conditioning system. The solenoid valve control method includes the following steps: when the air conditioner is started or the air conditioner is in the starting state, judge whether the solenoid valve needs to be activated according to the acquired mode command, and if so, judge whether the pressure difference (ΔP) at both ends of the solenoid valve is less than a predetermined value (x), and control the solenoid valve to perform mode switching action after the pressure difference (△P) is less than the predetermined value (x). In the present invention, the pressure difference at both ends of the solenoid valve is used as a reference to control the solenoid valve to perform mode switching when the pressure difference is less than a predetermined value, thereby reducing the impact of the refrigerant caused by the mode switching, and further reducing the noise caused by the impact of the refrigerant , On the basis of the existing valve body structure, the noise reduction processing of mode switching is realized.

Description

technical field [0001] The invention relates to the technical field of air conditioning systems, in particular to a method for controlling a solenoid valve of a heat pump air conditioning system. Background technique [0002] The heat pump air conditioning system realizes the switching between cooling mode and heating mode through the action of a group of solenoid valves. [0003] The heat pump mode control unit controls the action of the solenoid valve according to the mode switching command. When the solenoid valve is in action, the heat pump air-conditioning system will generate very strong noise due to the impact of the refrigerant. In the prior art, the noise problem is solved by changing the structure of the valve body. However, this solution has problems such as high cost and long period. [0004] Therefore, it is urgent to design a solenoid valve control method for the heat pump air-conditioning system, so as to solve the noise problem by optimizing the solenoid va...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a solenoid valve control method for a heat pump air-conditioning system, by optimizing the control strategy of the existing heat pump air-conditioning system, to solve the noise problem caused by refrigerant impact in the prior art

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