Electronic expansion valve, coil assembly of electronic expansion valve and assembling method of coil assembly

Abstract

The invention discloses a coil assembly of an electronic expansion valve. The coil assembly comprises a coil pack of a stator winding, and a circuit board injection-molded part for mounting a circuit board; and the coil pack and the circuit board injection-molded part are subjected to two-times injection molding to be a whole, and thus a coil injection-molded part is formed. With the adoption of the structure, the coil injection-molded part subjected to the two-times injection molding ensures the airtightness between the circuit board injection-molded part and the coil pack, in the assembling process of the coil assembly, the circuit board injection-molded part and the coil pack are not required to be welded so that the probability that a welding joint between the circuit board injection-molded part and the coil pack leaks water is zero, and the working stability of the electronic expansion valve is ensured. In addition, the invention also discloses the electronic expansion valve using the coil assembly, and an assembling method of the coil assembly. The electronic expansion valve and the assembling method have the same effects as the coil assembly.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to an electronic expansion valve, a coil assembly thereof, and an assembly method for the coil assembly. Background technique [0002] The electronic expansion valve is installed between the liquid receiver and the evaporator, and is the dividing point between the high pressure and low pressure of the air conditioning and refrigeration system. The function of the electronic expansion valve is to throttle and decompress the high-pressure liquid refrigerant from the liquid receiver, adjust and control the amount of liquid refrigerant entering the evaporator, so as to adapt to the change of refrigeration load. The driving method of the electronic expansion valve is that the controller calculates the parameters collected by the sensor, sends an adjustment instruction to the circuit board, and the circuit board outputs an electrical signal to the electronic expansion valv...

AI Technical Summary

Problems solved by technology

[0011] Using the above-mentioned coil assembly 1', the airtightness of the space of the circuit board injection molded part 11' is mainly guaranteed by two weldings during assembly, that is, the welding of the coil assembly 12' and the circuit board injection molded part 11', and the connection between the circuit board injection molded part 11' and the cover. The welding of the plate 15' leads to a relatively cumbersome processing procedure of the coil assembly 1', and there is also a risk of water seepage at the weld between the coil assembly 12' and the circuit board injection molded part 11'

[0012] In addition, the circuit board injection molding part 11' is arranged on the side of the coil assembly, resulting in a large overall size of the coil assembly and an uncompact space layout

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