Two-way solenoid valve

Abstract

A bidirectional electromagnetic valve. A piston (3) is disposed in a valve chamber and a piston chamber (4) is formed. A main valve body (2) is provided with a first interface (2a) and a second interface (2b) both controlled by the piston (3) to be turned on or off. The bidirectional electromagnetic valve also has a first runner (2-1) and a second runner (2-2) both separately communicating with the first interface (2a) and the second interface (2b) to enable a refrigerant to flow out of the piston chamber (4), and the first runner (2-1) and the second runner (2-2) are both disposed in the main valve body (2). The main valve body (2) is provided inside with a guide valve runner (21d), and the piston chamber (4) communicates with a guide valve opening on a guide valve body (1) by using the guide valve runner (21d). A guide valve head (11) of the guide valve body (1) moves to open or close the guide valve opening to turn on or off the first runner (2-1), the second runner (2-2), and the piston chamber (4). The guide valve head (11) of the guide valve body (1) of the electromagnetic valve is separated from the piston (3), and when the electromagnetic valve has a great traffic demand, the stroke of a moving core does not need to be increased; dislocation is not easy to occur on the guide valve head (11) and the main valve body (2), a complicated guide element does not need to be disposed, the structure is simplified, the treatment cost and the assembly process cost are low, and the control precision can meet a requirement.

Description

technical field [0001] The invention relates to the technical field of valve bodies, in particular to a two-way solenoid valve. Background technique [0002] General solenoid valves, due to structural limitations, can only flow and stop in one direction; in conventional systems, they often need to be used in conjunction with one-way valves. In the heat pump system, the flow direction of the refrigerant in the cooling and heating processes is opposite, and two single-way solenoid valves need to be installed in series to achieve bidirectional flow, resulting in a complex system structure, low reliability, and high cost. Therefore, it is necessary to Design a two-way solenoid valve. [0003] Please refer to Figure 1-2 , figure 1 It is a schematic diagram of a typical two-way solenoid valve structure, figure 2 for figure 1 Schematic diagram of the structure of the pilot valve head and moving iron core of the middle two-way solenoid valve. [0004] The two-way solenoid v...

AI Technical Summary

Problems solved by technology

[0018] First, when the electromagnetic valve has a large flow demand, its valve port 1b will increase. Correspondingly, the stroke of the piston 30 needs to increase, and the stroke of the pilot valve head 50 needs to increase synchronously. Correspondingly, the stroke of the moving iron core 40 also needs to increase. However, with the increase of the stroke of the moving iron core 40, the suction force provided by the coil 70 decreases, and the valve opening ability of the valve body 1 drops sharply. In addition, the height of the solenoid valve will also increase; if the coil 70 increases , will bring a series of problems such as high power and temperature rise, and the volume of the solenoid valve will also increase

[0019] Second, during the two-way opening and closing process of the solenoid valve, the first check valve core 30a and the second check valve core 30c must always be aligned with the first piston flow channel 30k and the second piston flow channel 30d, so that radial Otherwise, the sealing function of the two check valve cores will fail, resulting in the failure of the two-way solenoid valve to close or open normally.

As a result, the structure of the pilot valve head 50 is relatively complicated, the processing is difficult, and the assembly process cost is relatively high. Even so, the control accuracy is still not ideal

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