Three-way electromagnetic valve

Abstract

The utility model discloses a three-way electromagnetic valve which comprises a valve body, a first valve seat assembly, a second valve seat assembly, a first piston assembly, a second piston assembly, a first coil assembly and a second coil assembly. A liquid inlet hole, a first liquid outlet hole and a second liquid outlet hole are formed in the side wall of the valve body, the liquid inlet hole is communicated with the first liquid outlet hole, and the first liquid outlet hole is communicated with the second liquid outlet hole through a middle hole; a first mounting hole intersected with the first liquid outlet hole and a second mounting hole intersected with the second liquid outlet hole are formed in the top wall of the valve body; the first piston assembly is mounted in the first mounting hole, the first valve seat assembly is mounted at the upper end of the first mounting hole, and the first piston assembly is connected with the first valve seat assembly; the first coil assembly is arranged outside the first valve seat assembly in a sleeving mode, and the first valve seat assembly drives the first piston assembly to slide up and down through the first coil assembly. The structure of the valve body is optimized, the number of pipelines is reduced, and meanwhile the installation occupied space is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic valves, in particular to a three-way electromagnetic valve. Background Art

[0002] There are some shortcomings in the flow control valve in the automobile air conditioning circuit. For example, two solenoid valves need to be connected through a pipeline to achieve the one-in and two-out function. Secondly, the system pipeline of the valve body itself is more complicated, and the installation space is large. Therefore, a three-way solenoid valve is needed to meet the above functions. Utility Model Content

[0003] Aiming at the defects in the prior art, the structure of the valve body itself is optimized, the number of pipelines is reduced, and the installation space is reduced. The utility model provides a three-way solenoid valve, including a valve body, a first valve seat assembly, a second valve seat assembly, a first piston assembly, a second piston assembly, a first coil assembly and a second coil assembly;

[0004] The side wall of the valve body is provided with a liquid inlet hole, a first liquid outlet hole and a second liquid outlet hole, wherein the liquid inlet hole is connected with the first liquid outlet hole, and the first liquid outlet hole and the second liquid outlet hole are connected through the middle hole; the top wall of the valve body is provided with a first mounting hole intersecting with the first liquid outlet hole, and a second mounting hole intersecting with the second liquid outlet hole;

[0005] The first piston assembly is installed inside the first mounting hole, the first valve seat assembly is installed at the upper end of the first mounting hole, and the first piston assembly is connected to the first valve seat assembly; the first coil assembly is sleeved on the outside of the first valve seat assembly, and the first valve seat assembly drives the first piston assembly to slide up and down through the first coil assembly, thereby controlling the connection and disconnection between the liquid inlet hole and the first liquid outlet hole;

[0006] The second piston assembly is installed inside the second mounting hole, the second valve seat assembly is installed at the upper end of the second mounting hole, and the second piston assembly is connected to the second valve seat assembly; the second coil assembly is sleeved on the outside of the second valve seat assembly, and the second valve seat assembly drives the second piston assembly to slide up and down through the second coil assembly, thereby controlling the on-off between the liquid inlet hole and the second liquid outlet hole.

[0007] The beneficial effect of the device is that the first valve seat assembly, the second valve seat assembly, the first piston assembly and the second piston assembly are integrated into one valve body, and one liquid inlet hole is shared, so as to realize one inlet and two outlets, reduce the number of liquid inlet pipelines, and do not need to be divided into two routes. Since there is only one valve body, the overall structure is compact and occupies less installation space.

[0008] Preferably, the first valve seat assembly and the second valve seat assembly have the same structure, and both include a sealing head, a moving iron core, a pressing plate, a valve needle spring, a valve needle, a sleeve, a static iron core and a valve seat; the sleeve is connected to the upper end of the valve seat, the moving iron core and the static iron core are respectively installed in the upper and lower parts of the sleeve, and the moving iron core can slide up and down in the sleeve, and the sealing head is connected to the upper end opening of the sleeve; the moving iron core and the static iron core are both provided with a through hole adapted to the valve needle, and the lower end of the valve needle passes through the through holes of the moving iron core and the static iron core and then extends into the inner cavity of the valve seat and contacts with the first piston assembly or the second piston assembly, the valve needle spring is pressed against the upper end of the valve needle by a pressing plate, and the pressing plate is fixed to the moving iron core. The structures of the first valve seat assembly and the second valve seat assembly are exactly the same, and the principles are also the same, both of which control the moving iron core to move up or down after the coil assembly is energized. For example, when the moving iron core moves downward, the valve needle spring pushes the valve needle downward, and the valve needle pushes the first piston assembly downward and blocks between the liquid inlet and the first liquid outlet, or pushes the second piston assembly downward and blocks between the liquid inlet and the second liquid outlet. Conversely, when the moving iron core moves upward, the first piston assembly connects the liquid inlet and the first liquid outlet, or the second piston assembly connects the liquid inlet and the second liquid outlet.

[0009] Preferably, a step surface is provided at the upper part of the through hole of the moving iron core, and a terminal head corresponding to the step is provided at the upper end of the valve needle, and the terminal head is pressed against the step surface by the valve needle spring. The terminal head can prevent the valve needle from slipping out of the through hole of the moving iron core, and limit the relative position between the valve needle and the moving iron core.

[0010] Preferably, a core iron spring is provided between the moving iron core and the stationary iron core. The moving iron core will compress the core iron spring when it moves downward, and the core iron spring stores potential energy, provides kinetic energy for the moving iron core, and reduces the coil load.

[0011] Preferably, the valve seat is connected to the first mounting hole or the second mounting hole by threads, and two O-rings are provided on the outer side of the valve seat, and the two O-rings are distributed along the longitudinal direction of the valve seat. The outer side of the valve seat is provided with an annular groove for the O-rings, and after the valve seat is screwed into the corresponding mounting hole by threads, the two O-rings are pressed against the side wall of the mounting hole, and the sealing effect of the two O-rings is better, and the risk of product leakage is lower.

[0012] Preferably, the first liquid outlet hole and the second liquid outlet hole are located on the same side of the valve body, and the liquid inlet hole is located on the other side of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0014] Figure 1 It is a structural schematic diagram of this embodiment;

[0015] Figure 2 for Figure 1 Schematic diagram of the internal structure;

[0016] Figure 3 for Figure 2 Sectional view along AA direction;

[0017] Figure 4 for Figure 2 Cross-sectional view along the BB direction;

[0018] Figure 5 is a schematic structural diagram of the first piston assembly or the second piston assembly in this embodiment;

[0019] In the accompanying drawings, there are valve body 1, first piston assembly 2, second piston assembly 3, first coil assembly 4, second coil assembly 5, liquid inlet hole 6, first liquid outlet hole 7, second liquid outlet hole 8, middle hole 9, head 10, moving iron core 11, pressing plate 12, valve needle spring 13, valve needle 14, sleeve 15, static iron core 16, valve seat 17, through hole 18, step surface 19, end head 20, core iron spring 21, O-ring 22, and piston spring 23. DETAILED DESCRIPTION

[0020] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0021] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0022] like Figure 1 , Figure 2 As shown, this embodiment provides a three-way solenoid valve, including a valve body 1, a first valve seat assembly, a second valve seat assembly, a first piston assembly 2, a second piston assembly 3, a first coil assembly 4 and a second coil assembly 5. The side wall of the valve body 1 is provided with a liquid inlet hole 6, a first liquid outlet hole 7 and a second liquid outlet hole 8, the first liquid outlet hole 7 and the second liquid outlet hole 8 are located on the same side of the valve body 1, and the liquid inlet hole 6 is located on the other side of the valve body 1. The liquid inlet hole 6 is connected with the first liquid outlet hole 7, and the first liquid outlet hole 7 and the second liquid outlet hole 8 are connected through the middle hole 9. The valve body 1 is designed to share a liquid inlet hole 6, realize one inlet and two outlets, reduce the number of liquid inlet pipelines, and do not need to be divided into two routes.

[0023] In order to integrate two solenoid valves and the piston on one valve body 1 , in this embodiment, a first mounting hole intersecting with the first liquid outlet hole 7 and a second mounting hole intersecting with the second liquid outlet hole 8 are provided on the top wall of the valve body 1 .

[0024] The specific installation method of the first piston assembly 2 and the first piston assembly 2 is as follows:

[0025] like Figure 2 , Figure 3 As shown, the first piston assembly 2 is installed inside the first mounting hole, the first valve seat assembly is installed at the upper end of the first mounting hole, and the first piston assembly 2 is connected to the first valve seat assembly; the first coil assembly 4 is sleeved on the outside of the first valve seat assembly, and the first valve seat assembly drives the first piston assembly 2 to slide up and down through the first coil assembly 4, thereby controlling the on-off between the liquid inlet hole 6 and the first liquid outlet hole 7. Figure 2 , Figure 4 As shown, the second piston assembly 3 is installed inside the second mounting hole, the second valve seat assembly is installed at the upper end of the second mounting hole, and the second piston assembly 3 is connected to the second valve seat assembly; the second coil assembly 5 is sleeved on the outside of the second valve seat assembly, and the second valve seat assembly drives the second piston assembly 3 to slide up and down through the second coil assembly 5, thereby controlling the connection between the liquid inlet hole 6 and the second liquid outlet hole 8.

[0026] like Figure 2 , Figure 5As shown, the first valve seat assembly and the second valve seat assembly in this embodiment have the same structure, and both include a sealing head 10, a moving iron core 11, a pressing plate 12, a valve needle spring 13, a valve needle 14, a sleeve 15, a static iron core 16 and a valve seat 17. The sleeve 15 is connected to the upper end of the valve seat 17, the moving iron core 11 and the static iron core 16 are respectively installed in the upper part and the lower part of the sleeve 15, and the moving iron core 11 can slide up and down in the sleeve 15, and the sealing head 10 is connected to the upper end opening of the sleeve 15. The moving iron core 11 and the static iron core 16 are both provided with a through hole 18 adapted to the valve needle 14, and the lower end of the valve needle 14 passes through the through holes 18 of the moving iron core 11 and the static iron core 16 and then extends into the inner cavity of the valve seat 17 and contacts the first piston assembly 2 or the second piston assembly 3, the valve needle spring 13 is pressed against the upper end of the valve needle 14 through the pressing plate 12, and the pressing plate 12 is fixed to the moving iron core 11. Specifically, a step surface 19 is provided at the upper portion of the through hole 18 of the moving iron core 11, and an end head 20 corresponding to the step is provided at the upper end of the valve needle 14, and the end head 20 is pressed against the step surface 19 by the valve needle spring 13. The end head 20 can prevent the valve needle 14 from slipping out of the through hole 18 of the moving iron core 11, and limits the relative position between the valve needle 14 and the moving iron core 11. A core iron spring 21 is provided between the moving iron core 11 and the static iron core 16. The core iron spring 21 will be compressed during the downward movement of the moving iron core 11, and the core iron spring 21 stores potential energy, provides kinetic energy for the moving iron core 11, and reduces the coil load. The structures of the first valve seat assembly and the second valve seat assembly are exactly the same, and the principles are also the same, both of which control the upward or downward movement of the moving iron core 11 after the coil assembly is energized. For example, when the moving iron core 11 moves downward, the valve needle 14 is pushed downward by the valve needle spring 13, and the valve needle 14 pushes the first piston assembly 2 downward and blocks between the liquid inlet hole 6 and the first liquid outlet hole 7, or the valve needle 14 pushes the second piston assembly 3 downward and blocks between the liquid inlet hole 6 and the second liquid outlet hole 8. Conversely, when the moving iron core 11 moves upward, the first piston assembly 2 connects the liquid inlet hole 6 and the first liquid outlet hole 7, or the second piston assembly 3 connects the liquid inlet hole 6 and the second liquid outlet hole 8.

[0027] like Figure 4 As shown, the valve seat 17 in this embodiment is connected to the first mounting hole or the second mounting hole by threads. In addition, two O-rings 22 are provided on the outer side of the valve seat 17, and the two O-rings 22 are distributed along the longitudinal direction of the valve seat 17. The outer side of the valve seat 17 is provided with an annular groove for the O-rings 22. After the valve seat 17 is screwed into the corresponding mounting hole by threads, the two O-rings 22 are pressed against the side wall of the mounting hole, and the two O-rings 22 have a better sealing effect and a lower risk of product leakage.

[0028] In addition, if Figure 4As shown, the first piston assembly 2 and the second piston assembly 3 in this embodiment are respectively provided with a piston spring 23. When the first piston assembly 2 or the second piston assembly 3 moves downward, the corresponding piston spring 23 is compressed to store energy, thereby providing kinetic energy for the upward movement and reset of the piston.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A three-way solenoid valve, characterized in that: It includes a valve body, a first valve seat assembly, a second valve seat assembly, a first piston assembly, a second piston assembly, a first coil assembly and a second coil assembly; The side wall of the valve body is provided with a liquid inlet hole, a first liquid outlet hole and a second liquid outlet hole, wherein the liquid inlet hole is connected with the first liquid outlet hole, and the first liquid outlet hole and the second liquid outlet hole are connected through the middle hole; the top wall of the valve body is provided with a first mounting hole intersecting with the first liquid outlet hole, and a second mounting hole intersecting with the second liquid outlet hole; The first piston assembly is installed inside the first mounting hole, the first valve seat assembly is installed at the upper end of the first mounting hole, and the first piston assembly is connected to the first valve seat assembly; the first coil assembly is sleeved on the outside of the first valve seat assembly, and the first valve seat assembly drives the first piston assembly to slide up and down through the first coil assembly, thereby controlling the connection and disconnection between the liquid inlet hole and the first liquid outlet hole; The second piston assembly is installed inside the second mounting hole, the second valve seat assembly is installed at the upper end of the second mounting hole, and the second piston assembly is connected to the second valve seat assembly; the second coil assembly is sleeved on the outside of the second valve seat assembly, and the second valve seat assembly drives the second piston assembly to slide up and down through the second coil assembly, thereby controlling the on-off between the liquid inlet hole and the second liquid outlet hole.

2. A three-way solenoid valve according to claim 1, characterized in that: The first valve seat assembly and the second valve seat assembly have the same structure and both include a head, a moving iron core, a pressing plate, a valve needle spring, a valve needle, a sleeve, a static iron core and a valve seat; the sleeve is connected to the upper end of the valve seat, the moving iron core and the static iron core are respectively installed in the upper and lower parts of the sleeve, and the moving iron core can slide up and down in the sleeve, and the head is connected to the upper end opening of the sleeve; the moving iron core and the static iron core are both provided with a through hole adapted to the valve needle, the lower end of the valve needle penetrates through the through holes of the moving iron core and the static iron core and then extends into the inner cavity of the valve seat and contacts the first piston assembly or the second piston assembly, the valve needle spring is pressed against the upper end of the valve needle through the pressing plate, and the pressing plate is fixed to the moving iron core.

3. A three-way solenoid valve according to claim 2, characterized in that: A step surface is arranged on the upper part of the through hole of the moving iron core, and an end head corresponding to the step is arranged on the upper end of the valve needle, and the end head is pressed tightly against the step surface by the valve needle spring.

4. A three-way solenoid valve according to claim 2, characterized in that: A core iron spring is arranged between the moving iron core and the static iron core.

5. A three-way solenoid valve according to claim 2, characterized in that: An O-type sealing ring is arranged on the outer side of the valve seat.

6. A three-way solenoid valve according to claim 5, characterized in that: There are two O-type sealing rings, which are distributed along the longitudinal direction of the valve seat.

7. A three-way solenoid valve according to claim 2, characterized in that: The valve seat is connected to the first mounting hole or the second mounting hole through threads.

8. The three-way solenoid valve according to claim 1, characterized in that: The first liquid outlet hole and the second liquid outlet hole are located on the same side of the valve body, and the liquid inlet hole is located on the other side of the valve body.

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