Electronic expansion valve, stepper motor and reversing valve

Abstract

The invention discloses an electronic expansion valve, which comprises an electrical control part and a mechanical part. The electrical control part comprises a bus signal reception / transmission module, a central processing module and a stepper motor driving module; wherein the bus signal reception / transmission module is used for receiving a bus control signal and transmitting the bus control signal to the central processing module; the central processing module is used for extracting valve opening information included in the bus control signal, generating a corresponding pulse control signalin combination with current position information of a stepper motor read from a data storage module, and outputting the pulse control signal to the stepper motor driving module; and the stepper motordriving module is used for driving the stepper motor to adjust the valve opening according to the pulse control signal. The invention also discloses a stepper motor and a reversing valve. The number of drive wires directly connected with a main control board can be reduced, the structure of the main control board can be simplified, and the manufacturing cost can be saved.

Description

technical field [0001] The invention relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve, a stepping motor and a reversing valve. Background technique [0002] In the field of household air conditioners, stepping motor type electronic expansion valves are generally used. The electronic expansion valve usually includes a stepping motor and a valve body, and the opening of the valve body is controlled by the rotation of the stepping motor. In the existing electronic expansion valve, the driving circuit of the stepping motor is generally integrated on the main control board and connected to the stepping motor through a driving line. When the main control board needs to drive the electronic expansion valve, it sends a corresponding pulse control signal to the drive circuit, and then drives the stepper motor to rotate, so that the valve body reaches the corresponding opening. [0003] At present, in automobile air condit...

AI Technical Summary

Problems solved by technology

Considering that the main control board of the car needs to control multiple sensors such as daylight sensor, humidity sensor and temperature sensor at the same time, and simultaneously control compressors, multiple fans, etc., in a limited space, add additional drive lines to realize the main control board. The direct connection with the electronic expansion valve will lead to a lot of driving lines from the main control board, and the structure of the main control board is very complicated, which increases the manufacturing cost

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