Electronic expansion valve

Abstract

This invention relates to one electrical expansion valve, which comprises valve socket, coils connected to the valve cover tube and cover tube, wherein, the valve socket is opened with entrance and exit mouth and valve mouth connected; the said cover tube and valve socket form sealed chamber with one magnetic rotor part to sense the said coil magnetic rotation and to convert into axle direction; the magnetic rotor down end is located with one valve bar to lift with the said valve with top end located inside cover tube to match with brake part; the said valve socket is fixed with one screw and the rotor is set with one wire bar.

Description

【Technical field】 [0001] The invention relates to a rotary electronic expansion valve, which is used for flow control of refrigerant medium flowing through the valve body. 【Background technique】 [0002] The current rotary electronic expansion valve uses the principle of a stepping motor to drive the magnetic rotor part to rotate forward and reverse with a coil, and the magnetic rotor part drives the valve stem up and down to change the flow area of ​​the valve port, so as to realize the cooling of the flow through the valve port. The flow of the agent medium is controlled according to the predetermined flow-pulse curve, and the invention patent with the authorized notification number CN2637833Y represents the more advanced technical solution of this electronic expansion valve. Yet this scheme at least also has the following disadvantages: (1), the cooperation between the screw mandrel and the screw sleeve of its magnetic rotor part requires flexible rotation, so there is us...

AI Technical Summary

Problems solved by technology

Yet this scheme at least also has the following disadvantages: (1), the cooperation between the screw mandrel and the screw sleeve of its magnetic rotor part requires flexible rotation, so there is usually a certain gap between the screw mandrel and the screw sleeve. There is a magnetic rotor component that will deviate from its designed action position when it rotates (such as swinging relative to the axis of the valve body), thereby generating vibration and noise; (2) When the magnetic rotor component drives the valve stem up and down, the valve stem and There will be mutual rotation between the screw rods, and the spring supported at the rear end of the valve rod will hinder the rotation due to contact with the valve rod or the screw rod, and the action is inflexible; (3), the axial size of the stopper part is large, and many The first-stage rotor is in the shape of "", which increases the specification of the entire electronic expansion valve and occupies the installation position; (4), the upper and lower ends of the coil frame basically have a continuous planar structure, so even if all of them are encapsulated by molding resin injection molding , it is also difficult to achieve good water resistance and insulation, and the infiltration of condensed water formed by condensation on the surface of the coil will lead to a decrease in the insulation performance of the coil or even failure

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