Adjusting method and adjusting device of electronic expansion valve for air conditioning unit

Abstract

The invention provides an adjusting method of an electronic expansion valve for an air conditioning unit. The method comprises the steps of detecting indoor environment temperature Ti, outdoor environment temperature To and compressor running frequency f when the air conditioning unit is stared and runs, determining the initial opening degree P1 of the electronic expansion valve through the formula of P1= A*Ti + B*To + C*f + D, controlling the initial opening degree of the electronic expansion valve according to the P1, detecting the actual exhaust gas temperature T of a compressor after the air conditioning unit runs stably, enabling the electronic expansion valve to maintain a current opening degree state when the T is in an optimum target exhaust gas temperature range, reducing the opening degree of the electronic expansion valve when the T is lower than the lower limiting value of the optimum target exhaust gas temperature range, increasing the opening degree of the electronic expansion valve when the T is higher than the upper limiting value of the optimum target exhaust gas temperature range, and returning to a former step. The adjusting method reduces the time needed for adjusting the electronic expansion valve, and improves the reliability of the running of the air conditioning unit. The invention further provides an adjusting device of the electronic expansion valve for the air conditioning unit.

Description

technical field [0001] The invention relates to the technical field of adjusting the opening degree of an electronic expansion valve of an air-conditioning unit, and more specifically relates to an adjusting method and an adjusting device for an electronic expansion valve used in an air-conditioning unit. Background technique [0002] With the continuous development of industry and economy, air conditioners are gradually being widely used. Air conditioners mainly include compressors, condensers, evaporators, throttling devices, and electronic expansion valves. Among them, the electronic expansion valve mainly plays a throttling role in the air conditioning unit and is installed between the condenser and the evaporator. The quality of electronic expansion valve adjustment is directly related to the reliability of air conditioning unit operation. [0003] At present, the method of adjusting the electronic expansion valve in most air-conditioning units is as follows: [0004...

AI Technical Summary

Problems solved by technology

[0005] Since the initial opening of the electronic expansion valve is determined by experience, in the actual working process of the air conditioning unit, there will inevitably be a large difference between the initial opening and the optimal opening, resulting in the adjustment of the electronic expansion valve from the initial opening to It takes a certain amount of time for the optimum opening, that is, it takes a long time to adjust the electronic expansion valve, which leads to the poor operating state of the air conditioning unit in a long adjustment time, so that the existing electronic expansion valve adjustment method is not good. Guarantee the reliable operation of air conditioning units

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