Electric Valve

Abstract

The invention discloses an electric valve, aiming at the problems that the elasticity of a stopping part for preventing a coil from being loosened corresponding to a valve body is low in the prior art; the technical scheme of the invention comprises a valve seat, a valve needle, the stopping part and a stepping motor which is composed of a rotor and a stator for driving the valve needle and the valve seat to joint or detach; the stopping part is fixedly connected with a stator coil box, and internally concave bending parts which are opposite are additionally arranged above externally convex bending parts on two arm parts extended downwards thereof respectively, a clamping part is fixedly arranged on the outside surface of the stator coil box, a clamping opening adaptated with the clamping part is arranged on a basal part of the stopping part and is buttoned with the clamping part on the coil box to realize a clamping connection. The electric valve has the advantages of low working noise, compact structure and good assembling operability; moreover, the vibration reduction is greatly improved for obtaining accurate flow control; therefore, the electric valve is particularly suitable for refrigerators, air conditioning refrigerating units, water heaters and dehumidifiers, thus realizing defrosting, the flow control and on-off control and the like of a heating system.

Description

technical field [0001] The invention relates to a valve, in particular to an electric valve. Background technique [0002] At present, the electric valve used in the refrigeration system is driven by a stepper motor, and the opening of the valve is adjustable to control the flow of the medium in the pipeline. [0003] The solenoid valve with conventional structure includes a cover, an electromagnetic coil set outside the cover, a valve seat connected to the lower part of the cover, and a magnetic rotor, valve needle and valve seat located in the cover; the cover is made of non-magnetic materials such as stainless steel It has a cylindrical structure and is welded to the valve seat; the stator is composed of a yoke iron made of soft magnetic material and a stator coil wound through a coil barrel in the yoke iron. The stator and the rotor form a stepping motor for driving the valve needle Engagement or disengagement with respect to the valve seat. When the system is working,...

AI Technical Summary

Problems solved by technology

But, because the elastic force generated by the elastic deformation of the lower outer curved section 11 is used to engage the horizontal fluid inlet and outlet pipes, the stoppers fixed on the fluid inlet and outlet pipes will loosen when the elastic force is insufficient. The problem that the relative position between the coil and the valve body is fixed unreliably

[0006] In addition, during the assembly process of the electric valve, the stopper part is fixed on the coil box by spot welding, which must be welded. The above solution also has the disadvantages of poor operability and difficult assembly

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