Bidirectional electromagnetic valve

Abstract

The invention discloses a bidirectional electromagnetic valve which comprises a valve seat (1), wherein the valve seat (1) is provided with a main valve port (11) and a valve cavity; a piston (2) is arranged in the valve cavity, and divides the valve cavity into an upper cavity (12) and a lower cavity (13); a pilot valve port (21) is formed in the upper end part of the piston (2); a circulation clearance (14) is formed between the circumferential side wall of the piston (2) and the corresponding inner wall of the valve cavity; a first branch circuit, a second branch circuit and a third branch circuit are arranged on the piston (2); the first branch circuit can be in one-way conducting with one end of a horizontal connecting pipe (31) from the upper cavity (12); the second branch circuit can be in one-way conducting with one end of a vertical connecting pipe (32) from the upper cavity (12); the third branch circuit can be in one-way conducting with the upper cavity (12) from one end of the vertical connecting pipe (32). Through the adoption of the structural design, the bidirectional electromagnetic valve has the advantages that the quantity of components can be reduced remarkably; the assembly technique can be simplified; the manufacturing cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of solenoid valves, in particular to a two-way solenoid valve. Background technique [0002] General solenoid valves can only flow and stop in one direction due to structural limitations. In the air conditioning system, especially in the heat pump system, the refrigerant flows in the opposite direction during cooling and heating, so the general one-way solenoid valve needs to be used in conjunction with the one-way valve. However, the two-way solenoid valve can realize two-way conduction and cut-off, so it does not need to cooperate with a one-way valve, and can be used directly in the system pipeline, so it has a more obvious cost advantage. [0003] In the prior art, the Japanese patent "JP-6-101780" discloses a two-way solenoid valve, please refer to figure 1 and figure 2 , figure 1 It is a structural schematic diagram of a two-way solenoid valve in the prior art; figure 2 for figure 1 Schematic d...

AI Technical Summary

Problems solved by technology

However, this kind of structural design not only leads to more parts, but also is difficult to process, the assembly process is complicated, and the manufacturing cost is high;

[0012] Third, as can be seen from the above two defects, the solenoid valve in the prior art has many components, the assembly process is complicated, and the assembly difficulty is large, thus resulting in relatively poor reliability of work.

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