Electromagnetic valve with hard sealing structure

Abstract

The invention relates to an electromagnetic valve with a hard sealing structure. The electromagnetic valve comprises a valve body internally provided with a fluid channel and an accommodating cavity,and a valve module mounted in the accommodating cavity, wherein the fluid channel is communicated with the accommodating cavity; the valve module comprises a liquid inlet base, a valve element matchedwith the liquid inlet base and used for closing or opening the fluid channel, and a driving mechanism for driving the valve element to do reciprocating motion; the liquid inlet base is provided witha guide hole allowing the lower end of the valve element to extend in; the middle section of the liquid inlet base is provided with a plurality of liquid inlet holes formed in the circumferential direction of the liquid inlet base; the lower section of the liquid inlet base is provided with a valve element fluid channel and a flow channel slope located on the upper portion of the valve element fluid channel and used for adjusting flow; and the valve element sequentially comprises a large-diameter section, a slope section, a small-diameter section and a valve element end slope from top to bottom. Compared with the prior art, the electromagnetic valve has the advantages that a hard sealing assembly mode is adopted, so that leakage is not likely to be caused, and the service life of the electromagnetic valve is greatly prolonged.

Description

technical field [0001] The invention relates to an electromagnetic valve, in particular to an electromagnetic valve with a hard sealing structure. Background technique [0002] Automobile air-conditioning systems are prone to leakage, and their working refrigerant usually uses CO 2 . However, CO 2 The critical pressure is high (Pc=7.38MPa) and the critical temperature is low (Tc=31.25°C). In order to achieve good comprehensive refrigeration performance, the refrigeration system using carbon dioxide as the refrigerant must work in the transcritical region, and the working pressure exceeds the critical pressure. The current automotive air conditioning system is much higher than the working pressure. At present, the electronic expansion valve / electronic globe valve working in the high-pressure refrigeration system is to smoothly drive the movement of the valve core under high pressure. On the one hand, it adopts a large-scale motor and adds a reducer to increase the driving ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a solenoid valve with a hard sealing structure in order to overcome the problems of difficult sealing and easy leakage in the prior art.

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