Manufacturing method for coil of electronic expansion valve

Abstract

The invention is a method for making electronic expansion valve coil for a refrigerating system, firstly winding enamelled wires on upper and lower coil frames, the ends of the enamelled wires are welded with needles, and then placing two electromagnetic polar plates between the two coil frames, and characterized by assembling stator composed the above parts with an insulating sleeve socket, placing them in a mould cavity and locating, enveloping the stator and the insulating sleeve socket together to compose a coil enveloping piece, jacketing two stator cases on the coil enveloping piece, and finally connecting the edges of the two stator cases and welding a locating clamp piece on one stator case. It shortens moulding time, raises working efficiency, and has low manufacturing cost.

Description

technical field [0001] The invention relates to an electronic expansion valve coil used in a refrigeration system, in particular to a manufacturing method of the electronic expansion valve coil. Background technique [0002] The coil of the electronic expansion valve is the power drive source used in the refrigeration system to control the valve body of the electronic expansion valve. The original electronic expansion valve coils are all made of thermosetting plastics through a simple molding process. The manufacturing method is as follows (see figure 1 , 2 ): First, wind a certain number of enameled wires (III, IV) on the upper and lower bobbins (I, II). Then place two magnetically conductive electromagnetic pole plates (VI, VII) between the two coil frames, and cover the upper and lower magnetically conductive stator shells (VIII, IX) to form a stator assembly. After the stator assembly and an insulating sleeve socket (X) are assembled, they are ...

AI Technical Summary

Problems solved by technology

Because the coil magnetizer (electromagnetic pole plate and stator shell) is potted inside the plastic part, the coil volume is large and the heat dissipation of the coil is poor; the molding process takes a long time and the work efficiency is low; the coil encapsulation material It is a thermosetting plastic, the material cannot be recycled, and the manufacturing cost of the coil is high; the coil encapsulation material is different from the material used to make the coil skeleton and the insulating sleeve socket, and the three cannot be organically fused together, and the insulation and sealing performance is relatively poor; installed in The positioning card on the plastic part will loosen and the plastic part will break during use

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