Electromagnetic valve

Abstract

The invention discloses an electromagnetic valve, which comprises a valve seat, a valve port on the valve seat, an inlet pipe and an outlet pipe that are fixed through the valve seat, a sleeve connected with the valve seat as a whole, a moving iron core and a static iron core in the sleeve, a spring between the moving iron core and the static iron core, and a sealing element that is integrated with the moving iron core through a connecting part. The sealing element comprises: a sealing part right opposite to the outlet pipe, a filter element, a first holding part that faces to a chamber on the sealing element and is used for placing the filter element, an erasure part at an end part and a second holding part that is right opposite to the outlet pipe on the sealing part of the sealing element and used for placing the erasure part at the end part. Under the closed condition of the electromagnetic valve, the inlet pipe and the outlet pipe form an access through the sealing element and the access at least comprises the filter element, a first throttle access, a middle erasure part, a second throttle access, the erasure part at the end part and a spacer with a through hole which are sequentially arranged; and the end erasure part is a rotating body whose cross-sectional area increases along the direction of the flowing medium. The electromagnetic valve has excellent erasure effect.

Description

technical field [0001] The invention relates to the field of mechanical engineering, in particular to a normally open electromagnetic valve. Background technique [0002] Solenoid valves are widely used in hydraulic, vacuum, gas transmission and refrigeration systems, and play an important role in realizing automatic control of pipelines. [0003] A solenoid valve in a dehumidification without cooling air conditioner is a solenoid valve that can also pass a medium flow (such as refrigerant) in the closed valve state, and the medium flow rate is smaller than that in the open valve state, so it usually plays a throttling role. effect. For example, in a dehumidification air conditioner, a solenoid valve is used to connect two indoor heat exchangers. This type of air conditioner removes water vapor from the indoor air without lowering the temperature, so it is also called a dehumidification without cooling air conditioner. [0004] figure 1 It is a schematic diagram of the pr...

AI Technical Summary

Problems solved by technology

[0008] In the solenoid valve of the prior art, the flow noise of the medium is reduced to a certain extent through the process of "filtering-throttling-silencing", but it can no longer meet the increasing requirements of noise control standards, and the noise reduction effect needs to be further improved; In addition, during the long-term operation, the filter element accumulates a large amount of solid impurities and cannot be removed in time, making the filter passage unsmooth, and even causing blockage in severe cases, which affects the normal operation of the solenoid valve

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