Control method of electronic expansion valve of air conditioner
An electronic expansion valve and control method technology, applied in heating and ventilation control systems, refrigerators, heating methods, etc., can solve the problems of increasing the maintenance probability of air conditioners, shortening the service life of capacitors, etc., to achieve reliable design solutions and reduce start-up The effect of reducing resistance and inrush current values
Inactive Publication Date: 2014-12-10
WUHU MATY AIR CONDITIONING EQUIP CO LTD
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The invention discloses a control method of an electronic expansion valve of an air conditioner. The maximum opening of the electronic expansion valve is 480 pulses. The control method comprises the steps that after a starting instruction is received, a control system of the air conditioner opens the electronic expansion valve to the maximum opening or to more than 70% of the maximum opening, and then a compressor is started; after the compressor is started and operates for a period of time till operating stably, the opening of the electronic expansion valve is adjusted to the target operating opening; an air conditioner system operates normally; when a shutting-down instruction is received, the control system of the air conditioner opens the electronic expansion valve completely. According to the technical scheme, due to the fact that the electronic expansion valve is completely opened in the starting process, the coolant pressure difference between the two ends of a system throttling device can be reduced, the starting resistance of the compressor can be reduced, and the starting current can be reduced. The service life of system elements can be prolonged. A small-capacitance capacitor can be used, and therefore the system cost can be lowered, and impact on a power grid and other household appliances can be reduced.
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