Control method and device for electronic expansion valve, air conditioning unit and control method thereof

Abstract

The invention discloses a control method for an electronic expansion valve in an air-cooled cold and hot water air conditioning unit. The control method includes the steps that when the electronic expansion valve is powered on and started, a self-check program of the electronic expansion valve is started, and the electronic expansion valve is initialized and then gets into a standby state; when the electronic expansion valve operates, the external environment temperature of equipment where the electronic expansion valve is located is obtained in real time, and the opening degree of the electronic expansion valve in the operating state is adjusted in real time according to the external environment temperature; and when the electronic expansion valve stops operating and is kept powered on, the opening degree of the electronic expansion valve is reset to the opening degree in the standby state. The invention further discloses a control device for the electronic expansion valve, the air-cooled cold and hot water air conditioning unit and a control method thereof. Through specific initializing effect of the electronic expansion valve, normal operation of the electronic expansion valve is ensured, so that the problem that the span of opening degree adjustment in operation of the electronic expansion valve is too large is solved, and the stability and working performance of the equipment where the electronic expansion valve is located are improved effectively.

Description

technical field [0001] The invention relates to the field of air-conditioning equipment, in particular to a control method and device for an electronic expansion valve, an air-conditioning unit and a control method thereof. Background technique [0002] As a new throttling element, the electronic expansion valve has been widely used in the field of air conditioning. In the air-conditioning unit system, the controller regularly sends voltage pulse sequences to the coils of the electronic expansion valve stepping motor, so that the coils of each phase of the stepping motor are energized and de-energized according to a certain rule, so as to achieve regular control of each phase of the coil stator. The magnetic change of the claw stage controls the rotation of the rotor, and the rotation of the rotor drives the valve needle to move up and down to achieve the purpose of flow regulation. [0003] However, in actual use, due to the influence of the environment of the air conditio...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a control method and device for an electronic expansion valve, an air conditioner unit and its control method, aiming at solving the problem of out-of-step in the operation of the electronic expansion valve and affecting the stability of the operation of the electronic expansion valve and the effect of throttling control technical issues

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