变频空调电子膨胀阀的控制方法

Method for controlling electronic expansion valve of variable-frequency air conditioner

Abstract

本发明公开了一种将空调的电子膨胀阀控制方法分成两部分,即初始开度控制和冷媒目标排出温度控制。空调在开始运行时电子膨胀阀已经处于一个初始化后的开度,有利于冷媒的流动,有效降低了冷媒的排出压力,并且从初始化后的开度向目标开度值运动,行程较从最小开度向目标开度值少,有效减少了运行的时间。而且空调运行后,电子膨胀阀会根据机器测出的室外空气温度、冷媒排出温度、压缩机的运行频率来调整节电子膨胀阀的开度,使电子膨胀阀的开度控制始终处于最合适的开度值,有效降低冷媒排出温度,降低了冷媒排出压力以及空调的负荷。
The invention discloses a method for controlling an electronic expansion valve of an air conditioner, which comprises initial aperture control and refrigerant target exhaust temperature control. When the air conditioner starts to operate, the electronic expansion valve is in an aperture after initialization, thereby being beneficial to the flow of a refrigerant, effectively reducing the exhaust pressure of the refrigerant, realizing the movement from the aperture after initialization to a target aperture value, shortening the stroke from the minimum aperture to the target aperture value, and effectively shortening the operating time. After the air conditioner operates, the aperture of the electronic expansion valve can be adjusted according to the outdoor air temperature which is measuredby a machine, the exhaust temperature of the refrigerant and the operating efficiency of a compressor, thus the aperture of the electronic expansion valve is controlled to be the optimum aperture value, the exhaust temperature of the refrigerant is effectively reduced, and the exhaust pressure of the refrigerant and the load of the air conditioner are reduced.

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