Control method and device of electronic expansion valve

Abstract

The invention discloses a control method of an electronic expansion valve. The control method comprises the steps of periodically acquiring the current temperature of the environment in which an air conditioning system outdoor unit is positioned; when the preset temperature range which the current temperature belongs to is the same as the preset temperature range which the environment temperature of the last period belongs to, acquiring the current working frequency of an air conditioning system compressor at intervals every preset time; and every time when the current working frequency is acquired, adjusting the opening of the electronic expansion valve based on the current working frequency. The invention further discloses a control device of the electronic expansion valve. According to the control method and the control device, when the preset temperature range which the current temperature of the environment in which the air conditioning system is positioned belongs to does not change, namely, the outdoor environment temperature has slight change, the opening of the electronic expansion valve is regularly adjusted according to the current working efficiency of the compressor, so that the purpose that the opening of the electronic expansion valve is precisely adjusted is achieved, the air conditioning system is enabled to always run in better throttling modes, and the cooling and heating effects and energy efficiency of the air conditioning system are improved after the air conditioning system is started.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method and device for controlling an electronic expansion valve. Background technique [0002] At present, the throttling methods of air conditioning systems mainly include throttling control through electronic expansion valves or capillary tubes. Among them, air conditioning systems that use electronic expansion valves as throttling components need to adjust the opening flow rate of the expansion valve to achieve the use. better condition. [0003] The existing air conditioning system mainly adjusts the opening of the electronic expansion valve through the temperature range of the outdoor environment and the fixed exhaust temperature, so as to realize throttling control during the operation of the air conditioning system. However, when the outdoor ambient temperature changes within the same temperature range, that is, the outdoor ambient temperature changes little, t...

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Problems solved by technology

[0004] The present invention provides a control method and device for an electronic expansion valve, aiming to solve the problem that the opening of the electronic expansion valve remains basically unchanged in the existing air-conditioning system when the outdoor environment temperature changes little. low technical issues

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