Control method of throttle valve

Abstract

The invention belongs to the field of air conditioning equipment and in particular provides a control method of a throttle valve. The control method of the throttle valve provided by the invention aims to solve the problem that the energy efficiency factor is not considered when the opening of the throttle valve is adjusted by an existing control method of the throttling valve. According to the control method of the throttling valve provided by the invention, the opening value of the throttle valve can be adjusted for many times and temperature difference values of heat transferring media corresponding to different opening values are acquired, and then the optimum operating opening of the throttle valve is determined by comparing absolute values of all temperature difference values; meanwhile, the opening of the throttle valve is adjusted to the optimum operating opening, so that the opening of the throttle valve can be kept at the optimum operating opening constantly and the heating capacity or the refrigerating capacity generated by a heat pump unit can be kept in a preferred state constantly, and therefore, the work efficiency of the heat pump unit is improved to an extreme extent.

Description

technical field [0001] The invention belongs to the field of air-conditioning equipment, and in particular relates to a control method of a throttle valve. Background technique [0002] With the continuous improvement of people's living standards, people have also put forward higher and higher requirements for the living environment. In order to maintain a comfortable ambient temperature, air conditioners have become an essential device in people's lives. Specifically, most of the existing air conditioners use heat pump units, and the heat pump units need to control the flow rate of refrigerant through throttling devices. In order to realize the intelligent control of the heat pump unit, preferably, the existing heat pump unit mostly adopts an electronic expansion valve as a throttling device of the unit. The electronic expansion valve can accurately and quickly control the flow of the refrigerant by controlling the opening in real time, so as to realize the rapid and effe...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing throttling valve control method does not take energy efficiency factors into account when adjusting the opening of the throttle valve, it is easy to cause the heat pump unit to be in a low-efficiency operation state for a long time, thereby causing energy waste, the present invention provides a A control method of a throttle valve, the throttle valve is used in a heat pump unit, the control method includes the following steps: adjusting the opening degree of the throttle valve with a predetermined incremental value; detecting the flow of heat exchange medium into the heat pump unit The first temperature at the time and the second temperature when it flows out of the heat pump unit; execute the above two steps in a cycle until the predetermined condition is met; compare the results of multiple detections to determine the optimal operating opening of the throttle valve; wherein , the predetermined condition is that the opening degree of the throttle valve is smaller than the first predetermined opening degree or greater than the second predetermined opening degree, or the predetermined condition is that the number of times the loop is executed reaches a predetermined number of times, wherein the first The predetermined opening degree is smaller than the second predetermined opening degree

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