Solenoid valve

Abstract

The invention discloses a solenoid valve, relates to control on on / off of a refrigerant in a refrigerating system and plays a role in throttling, reducing pressure and eliminating flow noise of the refrigerant when the solenoid valve is closed. In the prior art, a silencer of a normally-open solenoid valve is arranged in a valve core component, and a good silencing effect is difficultly to achieve because the size of the valve core component is small and the space for installing the silencer is limited. In the solenoid valve, the length of a runner for fluid to pass through in a cavity of a valve body is increased, the number of the silencers is increased and the sizes of the silencers are expended to improve the silencing effect; a flow path of the refrigerant is changed, full friction between the refrigerant and hole walls are produced when the refrigerant passes through the narrow flow path to consume and absorb noise of the refrigerant during flowing and further improve the silencing effect; and the problem that an incurrent hole of the refrigerant is easily blocked is solved to ensure the normal operation of dehumidification on the premise of no temperature dropping of an air-conditioning system.

Description

technical field [0001] The invention relates to the technical field of refrigeration control, in particular to a throttling and low-noise normally open electromagnetic valve in a closed state. Background technique [0002] A normally open solenoid valve in a dehumidifying non-cooling air conditioner is a solenoid valve that can pass a medium flow (such as refrigerant) even in the closed valve state, and the medium flow rate is smaller than that in the open valve state, so it usually works to the throttling 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. [0003] JP 2002-323273 patent discloses an expansion valve, such as figure 1 As shown, the expansion valve 100 is closed, that is, in the throttling state, the noise can be r...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned prior art, and improve the effect of consuming and absorbing refrigerant noise by improving the structure of the normally open solenoid valve of the prior art, effectively suppressing the generation of refrigerant noise, and at the same time To prevent the inflow hole and outflow hole of the refrigerant from being blocked, the present invention adopts the following scheme for this reason:

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