Electromagnetic valve

Abstract

The invention provides an electromagnetic valve, of which the connection between a coil assembly and a valve seat thereof has high reliability, and the use is safer. The electromagnetic valve comprises a valve seat, a coil assembly and a connecting piece, wherein the connecting piece is connected with the coil assembly in a positioning way, the connecting piece comprises at least two oppositely arranged connecting portions, the valve seat comprises a plurality of joint parts tightly locked and cooperated with the connecting portions, and at least one of the joint parts is arranged on the opposite side of other joint parts. In the electromagnetic valve of the invention, the plurality of joint parts tightly locked and cooperated with the connecting portions of the connecting piece are arranged on the valve seat, and at least one joint part is arranged at the opposite side of the other joint parts, that is, the two sides of the electromagnetic valve are both provided with at least one connection point formed by tight locking of the connecting portion and the joint part, and the two sides of the electromagnetic valve are fixed; compared with the unilateral fixation in the prior art, the connection type of bilateral or multi-lateral fixation adopted by the electromagnetic valve is more stable, the connection reliability of the coil assembly and the valve seat is improved, and shake and noise during the use procedure are avoided.

Description

technical field [0001] The invention relates to the technical field of control valves, in particular to an electromagnetic valve. Background technique [0002] Solenoid valves are mainly used in refrigeration equipment, especially in heat pump air-conditioning pipelines, to control the on-off and flow direction of refrigerant through the opening and closing of solenoid valves. [0003] Please refer to figure 1 , figure 1 It is a three-dimensional structural schematic diagram of an arrangement mode of a solenoid valve in the prior art. [0004] The Chinese patent No. 201010579900.8 discloses a solenoid valve, including a valve seat 1' and a coil assembly 2', wherein the coil assembly 2' is set in a housing 3', and the bottom surface of the housing 3' is provided with a bayonet. And the locking part 4' is installed through the bayonet; the outer surface of the valve seat 1' is provided with a spherical crown recess 11', the locking part 4' has an elastic piece 41' extending...

AI Technical Summary

Problems solved by technology

[0005] In the above-mentioned existing solenoid valve, the locking part 4' and the valve seat 1' are detachably connected, and the elastic piece 41' is locked into the concave part 11' by its convex part, as described in the specification of the above-mentioned patent document. As mentioned above, the concave part 11' is formed as a relatively shallow spherical crown concave part in such a way that the engagement and release of the convex part of the elastic piece 41' are easy. This single point positioning connection method is easy to loosen, that is, the locking part The positioning reliability of 4' and valve seat 1' is low, which reduces the connection reliability of coil assembly 2' and valve seat 1'

[0006] On the other hand, the locking part 4' is arranged on one side of the coil assembly 2' and the valve seat 1'. This single-side positioning connection method has higher requirements on the locking part 4' and is not conducive to improving the coil assembly 2. The stability of 'and the valve seat 1' affects the positioning reliability of the coil assembly 2' and the valve seat 1'; define the extension direction of the coil assembly 2' to the valve seat 1' as the up and down direction, then the lower part of the coil assembly 2' It is difficult to form a complete fit between the plane and the upper plane of the valve seat 1', which will cause shaking and noise during the use of the solenoid valve

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