Driving system and method of electronic expansion valve

Abstract

The invention provides a driving method of the electronic expansion valve. The method comprises the following steps: the parameters of various types of electronic expansion valves are prestored; according to a first user instruction which contains the type of the current electronic expansion valve, the corresponding parameters in the stored parameters are determined; a control mode is determined according to a second user instruction, wherein the control mode contains voltage control, current control and communication control; when the control mode is voltage control or current control, a voltage value or current value is obtained according to the input voltage signal or current signal, the voltage value or current value is converted to a pulse sequence capable of controlling the electronic expansion valve, according to the corresponding determined parameters of the electronic expansion valve; when the control mode is communication control, the input opening per mille is converted to a pulse sequence capable of controlling the electronic expansion valve according to the corresponding determined parameters of the electronic expansion valve; and the electronic expansion valve is controlled according to the pulse sequence. By prestoring the parameters of electronic expansion valves, the driving method can be used for different types of electronic expansion valves, thus the driving method has universality; and the corresponding setting can be performed to the prestored parameters of electronic expansion valves according to the required opening and the opening control parameter can be set according to the required opening, thus the function of controlling the opening can be realized.

Description

technical field [0001] The invention relates to a driver and its driving method, in particular to an expansion valve driving system and its driving method. Background technique [0002] As the air-conditioning and refrigeration industries require expansion valves to have higher and higher energy efficiency ratios, precise temperature control, and a wide operating range, as well as the integration of new functions such as remote control and fault diagnosis, electronic expansion valves rely on their rapid, sensitive, and adjustable The advantages of precision, large adjustment range, stability and reliability have become a new type of expansion valve that meets the requirements of modern air conditioning and refrigeration industries. As a new type of throttling device, electronic expansion valves are controlled by microprocessors and are divided into stepping motor type and electromagnetic Coil type two structural forms. The so-called electronic expansion valve usually refers...

AI Technical Summary

Problems solved by technology

But at present, because the spool of the electronic expansion valve is a closed body, it is impossible to observe the current opening of the electronic expansion valve, so it is difficult for the electronic expansion valve driver to accurately control the opening of the electronic expansion valve

[0004] And because there are many manufacturers producing expansion valves at present, because the parameters and control methods of the expansion valve drivers produced by each manufacturer are different, so that the drivers produced by each manufacturer can only be used for matching electronic expansion valves produced by the manufacturers themselves. , so when using different types of electronic expansion valves, the corresponding driver must be changed, which is extremely inconvenient to use and not universal

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