Control method and device for electronic expansion valve, storage medium and air conditioner

Abstract

The invention discloses a control method and device for an electronic expansion valve, a storage medium and an air conditioner. The control method comprises the following steps: while a current operation mode of the air conditioner is a refrigerating mode, comparing current gas exhaust superheat degree of the air conditioner with preset first gas exhaust superheat degree, comparing current gas suction superheat degree of the air conditioner with preset first gas suction superheat degree, and controlling opening degree of the electronic expansion valve of the air conditioner according to compared results; while the current operation mode of the air conditioner is a heating mode, comparing current gas exhaust superheat degree of the air conditioner with preset second gas exhaust superheat degree, comparing current gas suction superheat degree of the air conditioner with preset second gas suction superheat degree, and controlling opening degree of the electronic expansion valve of the airconditioner according to the compared results. The opening degree of the electronic valve is controlled through gas suction superheat degree and gas exhaust superheat degree, so that regulating precision for the opening degree of the electronic expansion valve is improved, and therefore, heat exchange performance of the air conditioner is improved.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a control method and device for an electronic expansion valve, a computer-readable storage medium and an air conditioner. Background technique [0002] At present, the opening of the electronic expansion valve of the air conditioner is mainly controlled according to the suction superheat SSH or the exhaust superheat DSH, that is, it is necessary to calculate the superheat of the air conditioner by detecting the coil temperature to adjust the electronic expansion valve. Opening degree; when the air conditioner is running under low-temperature refrigeration and the machine is short of fluorine, the large change in system pressure will cause uneven distribution of refrigerant, resulting in the coil being in the refrigerant supercooling or superheating region, making the temperature detected by the coil biased. Low or high, so that the calculated suction superheat SS...

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Problems solved by technology

[0002] At present, the opening of the electronic expansion valve of the air conditioner is mainly controlled according to the suction superheat SSH or the exhaust superheat DSH, that is, it is necessary to calculate the superheat of the air conditioner by detecting the coil temperature to adjust the electronic expansion valve. Opening degree; when the air conditioner is running under low-temperature refrigeration and the machine is short of fluorine, the large change in system pressure will cause uneven distribution of refrigerant, resulting in the coil being in the refrigerant supercooling or superheating region, making the temperature detected by the coil biased. Low or high, so that the calculated suction superheat SSH or exhaust superheat DSH deviates from the actual, resulting in the temperature detected by the coil can not truly reflect the current real state of the air conditioner, which in turn leads to the direction of the air conditioner valve adjustment The discrepancy between the number of valve adjustment steps and the operating status of the air conditioner will reduce the heat transfer performance of the air conditioner

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