solenoid valve

Abstract

The present disclosure provides a solenoid valve including a piston, a valve core seat assembly and a valve core, the piston having a first chamber, the valve core seat assembly fixed to the first chamber and having a second chamber open at its lower end, the valve core being axially movable in the second chamber, the second chamber having a first step surface facing upward in the axial direction, the first step surface being arranged to abut against the lower end of the valve core when the valve core is located at the lower end of the second chamber. Through the above-mentioned structural design, the solenoid valve proposed in the present disclosure limits the position of the valve core by the first step surface of the valve core seat assembly, avoids the valve core from directly abutting against the piston, reduces the impact of the valve core on the piston, and can extend the service life of the mechanism and prevent the valve core from falling into the system and affecting the normal operation of the system.

Description

[Technical Field]

[0001] Related Applications This disclosure claims priority to Chinese application "Solenoid Valve" filed on December 7, 2021, with application number 202123059788.8, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to solenoid valves. [Background technology]

[0003] In conventional solenoid valves, the lower end of the valve core is pressed directly against the bottom of the piston chamber, causing the valve core to impact the piston for a long period of time and easily falling off. This reduces the service life of the solenoid valve and even causes parts such as the valve core to fall into the system, causing malfunctions. Summary of the Invention

[0004] According to one aspect of the present disclosure, there is provided an electromagnetic valve including a piston, a valve core seat assembly, and a valve core, wherein the piston has a first accommodating chamber, the valve core seat assembly is fixed to the first accommodating chamber and has a second accommodating chamber that is open at its lower end, and the valve core is axially movably disposed in the second accommodating chamber, wherein the second accommodating chamber has a first step surface facing upward in the axial direction, and the first step surface is positioned to abut against the lower end of the valve core when the valve core is located at the lower end of the second accommodating chamber. [Brief explanation of the drawings]

[0005] [Figure 1] 1 is a cross-sectional view of a solenoid valve according to an exemplary embodiment. [Figure 2] 2 is an enlarged schematic view of a partial structure of the solenoid valve shown in FIG. 1. [Figure 3] 10 is an enlarged schematic view of a partial structure of a solenoid valve according to another exemplary embodiment. FIG. [Figure 4] 10 is an enlarged schematic view of a partial structure of a solenoid valve according to another exemplary embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0006] Next, exemplary embodiments will be described more fully with reference to the drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Rather, the presentation of these embodiments will make this disclosure thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings indicate the same or similar components, and therefore detailed descriptions thereof will be omitted.

[0007] 1, a cross-sectional view of the solenoid valve proposed in the present disclosure is shown. In an exemplary embodiment, the solenoid valve proposed in the present disclosure will be described as being applied to, for example, a cooling device in an air conditioning system. Those skilled in the art will easily understand that even if various modifications, additions, substitutions, deletions, or other changes are made to the specific embodiments below in order to apply the related designs of the present disclosure to other types of devices or systems, these changes will still fall within the scope of the principles of the solenoid valve proposed in the present disclosure.

[0008] As shown in Fig. 1, in one embodiment of the present disclosure, the solenoid valve proposed in the present disclosure includes a valve element 100, a piston 200, a valve core seat assembly 300, and a valve core 400. Also referring to Fig. 2, Fig. 2 representatively shows an enlarged schematic view of a partial structure of a solenoid valve that can embody the principles of the present disclosure, specifically showing the assembled structure of the piston 200, valve core seat assembly 300, and valve core 400 of the solenoid valve. Hereinafter, the structure, connection form, and functional relationship of each main component of the solenoid valve proposed in the present disclosure will be described in detail with reference to the above-mentioned drawings.

[0009] 1 and 2 , in an embodiment of the present disclosure, the piston 200 has a first accommodating chamber 210. The valve core seat assembly 300 is fixed to the first accommodating chamber 210, and has a second accommodating chamber 330 that opens at its lower end. The valve core 400 is disposed in the second accommodating chamber 330, and the valve core 400 can move in the second accommodating chamber 330 along the axial direction X. Accordingly, the second accommodating chamber 330 has a first step surface S1 that faces upward along the axial direction X and can abut against the lower end of the valve core 400 when the valve core 400 is located at the lower end of the second accommodating chamber 330. According to the above structural design, the solenoid valve proposed in the present disclosure limits the position of the valve core 400 by the first step surface S1 of the valve core seat assembly 300, preventing the valve core 400 from directly contacting the piston 200, reducing the impact of the valve core 400 on the piston 200, thereby extending the service life of the mechanism and preventing the valve core 400 from falling into the system and affecting the normal operation of the system.

[0010] 2 , in one embodiment of the present disclosure, the valve core seat assembly 300 may include a seat body 310 and a bushing 320 arranged adjacent to each other in the vertical direction. Specifically, the seat body 310 and the bushing 320 are both fixed to the first receiving chamber 210, and together define the second receiving chamber 330 of the valve core seat assembly 300, with the upper end of the seat body 310 being the upper end of the valve core seat assembly 300 and the lower end of the bushing 320 being the lower end of the valve core seat assembly 300. In some embodiments, the valve core seat assembly 300 is not limited to a structure including the seat body 310 and the bushing 320, and may, for example, be limited to, include only the seat body 310.

[0011] 2, in one embodiment of the present disclosure, the opening at the lower end of the bushing 320 (i.e., the lower end of the valve core seat assembly 300) is bent inward to form a bent portion 340, and the upper surface of the bent portion 340 facing upward along the axial direction X defines the above-mentioned first step surface S1 of the valve core seat assembly 300. As a result, in the present disclosure, the bent portion 340 abuts against the lower end of the valve core 400, thereby realizing impact protection for the piston 200 and restriction of the valve core 400.

[0012] Referring to FIG. 3, an enlarged schematic diagram of a partial structure of another exemplary embodiment of the solenoid valve proposed in the present disclosure is representatively shown, specifically, the assembly structure of the piston 200, the valve core seat assembly 300, and the valve core 400 of the solenoid valve is shown.

[0013] 3, in one embodiment of the present disclosure, a washer 350 may be provided in a position adjacent to the lower end opening 360 of the second housing chamber 330, and the upper surface of the washer 350 facing upward along the axial direction X defines the above-mentioned first step surface S1 of the valve core seat assembly 300. In this way, in the present disclosure, the washer 350 abuts against the lower end of the valve core 400, thereby realizing impact protection for the piston 200 and restriction of the valve core 400.

[0014] 3 , based on the structural design in which the washer 350 is provided in the second housing chamber 330, in one embodiment of the present disclosure, an attachment groove may be provided on the inner wall of the second housing chamber 330 adjacent to the lower end opening 360, and a portion of the washer 350 may be engaged or crimped into the attachment groove to attach the washer 350 to the valve core seat assembly 300. In some embodiments, the washer 350 may be attached to the second housing chamber 330 using other methods, such as welding. Furthermore, the washer 350 is not limited to being disposed in combination with the bent portion 340; that is, in various possible embodiments according to the design concept of the present disclosure, only the washer 350 may be provided without the bent portion 340, and is not limited thereto.

[0015] 3, based on the structural design in which the washer 350 is provided in the second receiving chamber 330, one embodiment of the present disclosure will be described taking the example of a valve core seat assembly 300 that includes only the seat body 310 and does not include the bushing 320, and based on this, the upper end of the seat body 310 is the upper end of the valve core seat assembly 300, and the lower end of the seat body 310 is the lower end of the valve core seat assembly 300. In this case, the bending portion 340 is formed by bending the lower end of the seat body 310, and the washer 350 is fixed to the seat body 310 and located in the second receiving chamber 330. In some embodiments, when the valve core seat assembly 300 further includes a bushing 320, when the opening at the lower end of the bushing 320 (i.e., the lower end opening 360 of the valve core seat assembly 300) is bent inward to form a bent portion 340, the washer 350 can be fixed to the bushing 320 and is located in the second accommodating chamber 330, and the washer 350 is arranged adjacent to and above the bent portion 340 along the axial direction X, but is not limited to this.

[0016] 2 and 3, in one embodiment of the present application, the first accommodating chamber 210 may have a second step surface S2 facing upward in the axial direction X, and the valve core seat assembly 300 may have a third step surface S3 facing downward in the axial direction X. Based on this, the second step surface S2 and the third step surface S3 abut against each other to restrict the position of the piston 200 of the valve core seat assembly 300 in the first accommodating chamber 210, thereby fixing and restricting the valve core seat assembly 300, preventing the valve core seat assembly 300 from falling off, and optimizing the fixing effect of the valve core seat assembly 300.

[0017] 2 and 3, based on a structural design in which the first accommodating chamber 210 and the valve core seat assembly 300 have a second step surface S2 and a third step surface S3 that are abuttingly engaged, in one embodiment of the present application, the piston 200 has a central hole 220 that communicates with the lower end of the first accommodating chamber 210. Based on this, the diameter of the central hole 220 is smaller than the inner diameter of the first accommodating chamber 210, so that the second step surface S2 is formed at the lower end of the first accommodating chamber 210. Based on this, the lower end opening 360 of the valve core seat assembly 300 is bent inward to form a bent portion 340, and the third step surface S3 is defined by the lower surface of the bent portion 340 that faces downward along the axial direction X.

[0018] Referring to FIG. 4, FIG. 4 shows an enlarged schematic diagram of a partial structure of another exemplary embodiment of the solenoid valve proposed in the present disclosure, specifically showing the assembly structure of the piston 200, the valve core seat assembly 300, and the valve core 400 of the solenoid valve.

[0019] 4 , based on the structural design in which the first accommodating chamber 210 and the valve core seat assembly 300 have the second step surface S2 and the third step surface S3 that are abutted and engaged, in one embodiment of the present disclosure, the first accommodating chamber 210 has a first chamber 2101 and a second chamber 2102 arranged one above the other along the axial direction X, and the inner diameter of the second chamber 2102 is smaller than the inner diameter of the first chamber 2101, so that the second step surface S2 is formed at the connection between the first chamber 2101 and the second chamber 2102. Based on this, the valve core seat assembly 300 may have a first part 301 and a second part 302 arranged one above the other along the axial direction X, and the outer diameter of the second part 302 is smaller than the outer diameter of the first part 301, so that the third step surface S3 is formed at the connection between the first part 301 and the second part 302. Accordingly, unlike the structural design adopted in the embodiments shown in Figures 2 and 3, in which the third step surface S3 is provided at the lower end of the valve core seat assembly 300, in the embodiment shown in Figure 4, the third step surface S3 is provided in the middle part of the valve core seat assembly 300, but the middle part means a part other than the upper and lower ends of the valve core seat assembly 300 and is not limited to only the middle position.

[0020] 2 and 3 , in one embodiment of the present disclosure, the valve core seat assembly 300 may have a third part 303 and a first part 301 arranged one above the other along the axial direction X, and the outer diameter of the third part 303 is smaller than that of the first part 301, so that a fourth step surface S4 facing upward along the axial direction X is formed at the connection between the first part 301 and the third part 303. Based on this, an extension part 230 may be provided at the peripheral position of the top opening of the first housing chamber 210 in which the piston 200 is located, and the extension part 230 may be crimped to the fourth step surface S4 to restrict the valve core seat assembly 300 and prevent the valve core seat assembly 300 from moving upward. Furthermore, the first portion 301 and the third portion 303 shown in Figures 2 and 3 are named after defining that the valve core seat assembly 300 has the first portion 301 and the second portion 302 in the embodiment shown in Figure 4, so as to distinguish between the portions of the valve core seat assembly 300 in different embodiments herein. In other words, it is described herein that in the embodiment shown in Figures 2 and 3, the valve core seat assembly 300 has the first portion 301 and the third portion 303, and in the embodiment shown in Figure 4, the valve core seat assembly 300 has the first portion 301, the second portion 302, and the third portion 303.

[0021] As shown in Figures 2 and 3, based on the structural design in which the valve core seat assembly 300 has a first part 301 and a third part 303, in one embodiment of the present disclosure, the third part 303 of the valve core seat assembly 300 may protrude from the first housing chamber 210.

[0022] As described above, the solenoid valve proposed in the present disclosure provides the first step surface S1 on the second receiving chamber 330 of the valve core seat assembly 300, so that the first step surface S1 abuts against the lower end of the valve core 400 when the valve core 400 is located at the lower end of the second receiving chamber 330. With the above-mentioned structural design, the solenoid valve proposed in the present disclosure uses the first step surface S1 of the valve core seat assembly 300 to restrict the position of the valve core 400, preventing the valve core 400 from directly abutting against the piston 200 and reducing the impact of the valve core 400 on the piston 200, thereby extending the service life of the mechanism and preventing the valve core 400 from falling into the system and affecting the normal operation of the system.

[0023] While the present disclosure has been described with reference to several exemplary embodiments, it should be understood that the terms used are for purposes of description and illustration, and not of limitation. Since the present disclosure can be specifically embodied in various forms without departing from the spirit or essence of the disclosure, the above-described embodiments should not be limited to any of the details set forth above, but should be broadly construed within the spirit and scope defined by the appended claims, and therefore, it should be understood that all changes and modifications that come within the scope of the claims or equivalents thereof should be covered by the appended claims.

Claims

1. The valve core seat assembly includes a piston, a valve core seat assembly, and a valve core, the piston having a first chamber, and the valve core seat assembly having a second chamber fixed to the first chamber and opening at a lower end thereof; The valve core is movably provided in the second housing chamber along the axial direction, the second accommodating chamber has a first step surface facing upward in the axial direction, and the first step surface is arranged to abut against a lower end of the valve core when the valve core is located at a lower end of the second accommodating chamber; the first accommodating chamber has a second step surface facing upward in the axial direction, the valve core seat assembly has a third step surface facing downward in the axial direction, the second step surface and the third step surface abuttingly engaged with each other, the first chamber has a first chamber and a second chamber arranged one above the other in the axial direction, the inner diameter of the second chamber being smaller than the inner diameter of the first chamber so that the second step surface is formed at a connection portion between the first chamber and the second chamber, and the valve core seat assembly has a first part and a second part arranged one above the other in the axial direction, the outer diameter of the second part being smaller than the outer diameter of the first part so that the third step surface is formed at a connection portion between the first part and the second part.

2. 2. The solenoid valve according to claim 1, wherein a lower end opening of the valve core seat assembly is bent inward to form a bent portion, and the first step surface is defined by an upper surface of the bent portion that faces upward along the axial direction.

3. 2. The solenoid valve according to claim 1, wherein a washer is provided in a position close to the lower end opening of the second accommodating chamber, and the first step surface is defined by an upper surface of the washer facing upward in the axial direction.

4. 4. The solenoid valve according to claim 3, wherein a lower end opening of the valve core seat assembly is bent inward to form a bent portion, and the washer is provided adjacent to and above the bent portion along the axial direction.

5. 5. The solenoid valve according to claim 1, wherein the valve core seat assembly has a third part and a first part arranged one above the other in the axial direction, the outer diameter of the third part being smaller than the outer diameter of the first part so that a fourth step surface facing upward in the axial direction is formed at a connection between the first part and the third part, and an extension part is provided at a peripheral position of a top opening of the first accommodating chamber in which the piston is located, and the extension part is arranged so as to be crimped to the fourth step surface.

6. The solenoid valve according to claim 5 , wherein the third portion of the valve core seat assembly protrudes from the first chamber.

7. 5. The solenoid valve according to claim 1, wherein the valve core seat assembly includes a seat body and a bushing arranged adjacent to each other in the vertical direction, the seat body and the bushing are both fixed to the first accommodating chamber and together define the second accommodating chamber, the upper end of the seat body is the upper end of the valve core seat assembly, and the lower end of the bushing is the lower end of the valve core seat assembly.

8. A valve core assembly including a piston, a valve core seat assembly, and a valve core, wherein the piston has a first accommodating chamber, and the valve core seat assembly has a second accommodating chamber fixed to the first accommodating chamber and opening at a lower end; The valve core is movably provided in the second housing chamber along the axial direction, the second accommodating chamber has a first step surface facing upward in the axial direction, and the first step surface is arranged to abut against a lower end of the valve core when the valve core is located at a lower end of the second accommodating chamber; the valve core seat assembly has a third part and a first part arranged one above the other in the axial direction, the outer diameter of the third part is smaller than the outer diameter of the first part so that a fourth step surface facing upward in the axial direction is formed at the connection between the first part and the third part, and an extension part is provided at a peripheral position of a top opening of the first accommodating chamber in which the piston is located, and the extension part is arranged so as to be crimped to the fourth step surface.

9. An electromagnetic valve as described in Claim 8, wherein a third part of the valve core seat assembly protrudes from the first accommodating chamber.

Images