Electronic expansion valve and step motor coil device thereof

Abstract

The invention discloses a step motor coil device, which is used for an electronic expansion valve of an air conditioner, which comprises a coil winding (1) and a driving circuit board (2), wherein a driving interface (21) and a circuit board bus interface (22) are arranged on the driving circuit board (2), the driving interface (21) is connected with the coil winding (1), the air conditioner comprises a main control board, a main control board bus interface is arranged on the main control board, and the circuit board bus interface (22) is connected with the main control board bus interface. Through the structure design of the device, the main control board structure of the electronic expansion valve can be simplified, and in addition, wire beams connected with the main control board are reduced. In addition, the invention also discloses the electronic expansion valve comprising the step motor coil device.

Description

Technical field [0001] The invention relates to the technical field of electronic expansion valves, in particular to a stepping motor coil device. In addition, the present invention also relates to an electronic expansion valve including the aforementioned stepping motor coil device. Background technique [0002] In the field of household air-conditioning, the existing stepping motor type electronic expansion valve adopts a structure where the main control board integrates a stepping motor drive circuit, thereby directly driving the stepping motor to adjust the opening of the valve body. Since the stepping motor drive circuit is integrated on the main control board, the main control board needs to add additional drive lines to drive the stepping motor, which not only increases the complexity of the main control board, but also adds additional control wiring harnesses. [0003] In the field of automotive air-conditioning, a thermal expansion valve (TXV) is commonly used. TXV senses...

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Problems solved by technology

[0004] In view of this, those skilled in the art consider applying the electronic expansion valve in the household air conditioner field to the automobile air conditioner, but the main control board of the automobile air conditioner needs to control multiple sensors such as daylight sensor, humidity sensor and temperature sensor at the same time, and simultaneously control the compressor, Multiple fans and electronic expansion valves, etc., so the main control board of the air conditioner needs to control many components. In a limited space, if the main control board of the air conditioner is directly connected with the electronic expansion valve and other actuators, the structure of the main control board of the air conditioner will Very complicated, and there will be a lot of drive lines drawn from the main control board

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