An electromagnetic valve

Abstract

This application provides a solenoid valve, including a valve body component, a moving iron core, and a piston. The valve body component includes a pipe and an annular protective portion. The moving iron core and the piston are located inside the pipe and are movable along the axial direction of the pipe. The annular protective portion is arranged around the central axis of the pipe, and on a projection plane perpendicular to the central axis of the pipe, the outer contour of the orthographic projection of the annular protective portion is located outside the outer periphery of the outer contour of the orthographic projection of the pipe. When the solenoid valve is accidentally dropped, the annular protective portion can reduce the possibility of the side wall of the pipe contacting the ground, thereby reducing the impact suffered by the pipe and reducing the degree of deformation of the pipe. This can alleviate or even avoid the phenomenon that the moving iron core and the piston cannot move smoothly inside the pipe due to pipe deformation.

Description

Technical Field

[0001] This application relates to the field of valve technology for refrigeration systems, and in particular to a solenoid valve. Background Technology

[0002] In refrigeration systems, solenoid valves house moving parts (pistons, moving iron cores, etc.) within pipe fittings. Because these pipe fittings have thin walls, they are prone to significant deformation upon accidental drops or impacts. This can cause the moving parts to become immobile, move sluggishly, or even jam, rendering the solenoid valve inoperable. Therefore, mitigating these issues is a technical problem that requires the expertise of those skilled in the art to solve. Utility Model Content

[0003] To solve the above-mentioned technical problems, this application provides a solenoid valve, which includes a valve body component, a piston, and a moving iron core. The valve body component includes a pipe and an annular protective part. The moving iron core and the piston are located inside the pipe and can move along the axial direction of the pipe. The annular protective part is arranged around the central axis of the pipe. On a projection plane perpendicular to the central axis of the pipe, the orthographic outer contour of the annular protective part is located on the outer periphery of the orthographic outer contour of the pipe.

[0004] The aforementioned solenoid valve has an annular protective part surrounding the central axis of the pipe fitting. On the projection plane perpendicular to the central axis of the pipe fitting, the outer contour of the annular protective part is located outside the outer contour of the pipe fitting. Therefore, when the solenoid valve is accidentally dropped, the annular protective part can reduce the possibility of the side wall of the pipe fitting contacting the ground, thereby reducing the impact on the pipe fitting and reducing the degree of deformation. This can alleviate or even avoid the phenomenon that the moving iron core and piston cannot move smoothly inside the pipe fitting due to the deformation of the pipe fitting. Attached Figure Description

[0005] Figure 1 A cross-sectional view of the first embodiment of the solenoid valve provided in this application;

[0006] Figure 2 for Figure 1 Enlarged view of the middle end cap and annular protective section;

[0007] Figure 3 for Figure 1 Enlarged view of the moving iron core and pilot valve core;

[0008] Figure 4 for Figure 1 Enlarged view of the piston in the middle;

[0009] Figure 5 for Figure 1 Enlarged view of the middle valve seat;

[0010] Figure 6 for Figure 1 Enlarged view of the first pipe section, moving iron core, annular protective part, pilot valve core, and end cover;

[0011] Figure 7 A front view of the second embodiment of the solenoid valve provided in this application;

[0012] Figure 8 for Figure 7 A sectional view;

[0013] Figure 9 A cross-sectional view of the end cap and annular protective portion of the third embodiment of the solenoid valve provided in this application.

[0014] The annotations in the attached figures are explained as follows:

[0015] 100 Valve body component, 101 Pipe fitting, 1011 First pipe section, A First end, B Second end, 1012 Second pipe section, C Third end, D Fourth end, 102 End cap, 1021 Cap body, 1022 Stop part, E Mounting hole, 103 Annular protective part, 1031 Sleeve, 1032 Annular boss;

[0016] 200 springs;

[0017] 300 Moving iron core, 301 First guide column section, 302 Connecting column section, 302a Connecting groove, 302b Riveting flange, 303 First axial through hole, 303a Spring abutment step, 302c Connecting hole;

[0018] 400 Piston, 401 Piston Body, 4011 Second Guide Column Section, 4011a Groove Section, 4011b Guide Valve Port Section, 4012 Sealing Column Section, 4012a Sealing Surface, 4013 Second Axial Through Hole Section, 402 Piston Ring.

[0019] 500 Valve seat, 501 Main valve port, 502 Third axial through hole, 502a Connector abutment step;

[0020] 600 Pilot valve core; 700 First connecting pipe; 800 Second connecting pipe; 900 Bushing; 1000 Valve chamber; 1100 Static iron core. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this application, the technical solution of this application will be further described in detail below with reference to the accompanying drawings.

[0022] like Figures 1-6 As shown, in this embodiment, the solenoid valve includes a valve body component 100, a spring 200, a moving iron core 300, a piston 400, a valve seat 500, a pilot valve core 600, a first connecting pipe 700, a second connecting pipe 800, a bushing 900, a valve chamber 1000, and a stationary iron core 1100.

[0023] The valve body component 100 includes a pipe fitting 101, an end cap 102, and an annular protective portion 103. The pipe fitting 101 includes a first pipe section 1011 and a second pipe section 1012, which are separately configured. The outer diameter of the second pipe section 1012 is larger than the outer diameter of the first pipe section 1011; that is, the inner diameter of the second pipe section 1012 is larger than the outer diameter of the first pipe section 1011. The axial ends of the first pipe section 1011 are defined as first end A and second end B, respectively. The axial ends of the second pipe section 1012 are defined as third end C and fourth end D, respectively. The end cap 102 is assembled at the third end C port of the second pipe section 1012. The end cap 102 has a mounting hole E, with the second end B of the first pipe section 1011 located within the mounting hole E and the third end C of the second pipe section 1012.

[0024] The annular protective portion 103 is disposed on the outer periphery of the end cap 102. In the illustrated embodiment, as shown... Figure 2 As shown, the end cap 102 includes a cap body 1021 located within the second pipe section 1012 and a stop portion 1022 disposed at one end of the cap body 1021. The stop portion 1022 is located outside the second pipe section 1012 and abuts against the third end C face of the second pipe section 1012. An annular protective portion 103 is integrally disposed on the outer periphery of the stop portion 1022. On a projection plane perpendicular to the central axis of the pipe fitting 101, the orthographic projection outer contour of the annular protective portion 103 is located on the outer periphery of the orthographic projection outer contour of the pipe fitting 101.

[0025] The moving iron core 300 is at least partially located within the first pipe section 1011. For example... Figure 3As shown, the moving iron core 300 is provided with a first guide post section 301, which is clearance-fitted with the first pipe section 1011, and can guide the moving iron core 300 to move axially within the first pipe section 1011. The moving iron core 300 is also provided with a connecting post section 302, the outer diameter of which is smaller than the outer diameter of the first guide post section 301. The connecting post section 302 is located on the side of the first guide post section 301 near the piston 400, and from the perspective of the illustration, the connecting post section 302 is located below the first guide post section 301. The connecting post section 302 is provided with a connecting groove 302a and a riveting flange 302b. The pilot valve core 600 is installed in the connecting groove 302a and riveted to the moving iron core 300 through the riveting flange 302b. In the illustrated embodiment, the pilot valve core 600 is a spherical structure. The moving iron core 300 is provided with a first axial through hole 303. A spring-loaded step 303a is provided on the side wall of the first axial through hole 303. One end of the first axial through hole 303 extends to the end face of the first guide column section 301 away from the connecting column section 302 (i.e., the upper end face of the first guide column section 301 in the figure), and the other end of the first axial through hole 303 is connected to the connecting groove 302a. The moving iron core 300 is provided with a connecting hole 302c, which extends approximately radially along the pipe fitting 101, penetrates the inner and outer circumferential surfaces of the connecting column section 302, and communicates with the first axial through hole 303. The connecting hole 302c and the first axial through hole 303 ensure that the axial movement of the moving iron core 300 is unaffected by pressure difference, resulting in less resistance and smoother movement.

[0026] The piston 400 is located within the second pipe section 1012. For example... Figure 4 As shown, the piston 400 includes a piston body 401 and a piston ring 402 disposed on the outer periphery of the piston body 401. The piston body 401 is provided with a second guide post section 4011, which is clearance-fitted with a second pipe section 1012 and can guide the piston 400 to move axially within the second pipe section 1012. The second guide post section 4011 is provided with a groove portion 4011a and a pilot valve port portion 4011b, and the pilot valve port portion 4011b forms an opening on the bottom wall of the groove portion 4011a. When the solenoid valve is in the closed state (e.g. Figure 1As shown in the figure, the pilot valve core 600 is located within the groove 4011a and can seal the pilot valve port 4011b. The piston body 401 also has a sealing column section 4012, the outer diameter of which is smaller than the outer diameter of the second guide column section 4011. The sealing column section 4012 is located on the side of the second guide column section 4011 away from the moving iron core 300. From the perspective of the figure, the sealing column section 4012 is located below the second guide column section 4011. The sealing column section 4012 has a sealing surface 4012a. The piston body 401 has a second axial through hole 4013. One end of the second axial through hole 4013 communicates with the pilot valve port 4011b, and the other end of the second axial through hole 4013 extends to the end face of the sealing column section 4012 away from the second guide column section 4011 (i.e., the lower end face of the sealing column section 4012 from the perspective of the figure).

[0027] The valve seat 500 is at least partially located within the second pipe section 1012. The valve seat 500 is located on the side of the piston 400 away from the moving iron core 300; from the illustrated perspective, the valve seat 500 is located below the piston 400. Figure 5 As shown, the valve seat 500 is provided with a main valve port 501 and a third axial through hole 502. The side wall of the third axial through hole 502 is provided with a connecting pipe abutment step 502a. One end of the third axial through hole 502 is connected to the main valve port 501, and the other end of the third axial through hole 502 extends to the end face of the valve seat 500 away from the piston 400 (i.e., the lower end face of the valve seat 500 from the perspective shown in the figure).

[0028] One end of the first connecting pipe 700 is inserted into the third axial through hole 502 of the valve seat 500 and abuts against the connecting pipe abutment step 502a. By setting the connecting pipe abutment step 502a, the assembly of the first connecting pipe 700 and the valve seat 500 becomes convenient.

[0029] The second pipe section 1012 has an opening on its side wall, and a bushing 900 is fixed to the outer periphery of the side wall of the second pipe section 1012. The bushing 900 surrounds the opening, and one end of the second connecting pipe 800 is located inside the bushing 900. The second connecting pipe 800 communicates with the valve cavity 1000 formed by the end cap 102, the valve seat 500, and the second pipe section 1012.

[0030] The stationary iron core 1100 is at least partially located within the first pipe section 1011. The stationary iron core 1100 is located on the side of the moving iron core 300 away from the piston 400. From the perspective of the illustration, the stationary iron core 1100 is located on the upper side of the moving iron core 300.

[0031] The spring 200 is located between the stationary iron core 1100 and the moving iron core 300, and one end of the spring 200 abuts against the spring abutment step 303a inside the moving iron core 300.

[0032] The aforementioned solenoid valve has an annular protective part 103 on the outer periphery of the end cap 102. On the projection plane perpendicular to the central axis of the pipe fitting 101, the outer contour of the annular protective part 103 is located on the outer periphery of the outer contour of the annular protective part 103. Therefore, when the solenoid valve is accidentally dropped, the annular protective part 103 can reduce the possibility of the side wall of the pipe fitting 101 contacting the ground, thereby reducing the impact suffered by the pipe fitting 101 and reducing the degree of deformation of the pipe fitting 101. This can alleviate or even avoid the phenomenon that the moving iron core 300 and piston 400 cannot move smoothly inside the pipe fitting 101 due to the deformation of the pipe fitting 101.

[0033] Furthermore, such as Figure 1 As shown, when the solenoid valve is closed, the orthographic projection of the annular protective part 103 falls within the orthographic projection range of the first guide column section 301 on a projection plane parallel to the central axis of the pipe fitting 101. This significantly reduces deformation in the clearance fit area between the pipe fitting 101 and the moving iron core 300, thereby more significantly alleviating the phenomenon that the moving iron core 300 cannot move smoothly within the pipe fitting 101 due to deformation.

[0034] Furthermore, such as Figure 1 As shown, when the solenoid valve is closed, the annular protective part 103 is located on the side of the piston 400 closest to the moving iron core 300 (i.e., Figure 1 The central annular protective part 103 is located on the upper side of the piston 400. (For example...) Figure 6 As shown, the two end faces of the moving iron core 300 along the axial direction are the first end face F and the second end face G, respectively. The first end face F is located on the side of the annular protective part 103 away from the piston 400, and the second end face G is located on the side of the annular protective part 103 closer to the piston 400. The axial distance H1 between the annular protective part 103 and the first end face F is greater than the axial distance H2 between the annular protective part 103 and the second end face G. This design allows the annular protective part 103 to be located near the clearance fit area between the piston 400 and the fitting 101, which can more significantly reduce the deformation of the clearance fit area between the fitting 101 and the piston 400, thereby more significantly alleviating the phenomenon that the piston 400 cannot move smoothly within the fitting 101 due to deformation of the fitting 101.

[0035] Alternatively, the annular protective section 103 can also be located on the outer periphery of the first pipe section 1011, or on the outer periphery of the second pipe section 1012.

[0036] When the annular protective part 103 is disposed on the outer periphery of the end cover 102, it can be integral with the end cover 101 or separate from the end cover 101. When the annular protective part 103 and the end cover 101 are separate, the annular protective part 103 and the end cover 101 can be fixed by welding, interference fit or other methods.

[0037] When the annular protective part 103 is disposed on the outer periphery of the first pipe section 1011, it can be integral with the end cap 101 or separate from the first pipe section 1011. When the annular protective part 103 and the first pipe section 1011 are separate, the annular protective part 103 and the first pipe section 1011 can be fixed by welding, interference fit or other means.

[0038] When the annular protective part 103 is disposed on the outer periphery of the second pipe section 1012, it can be integral with the end cap 101 or separate from the second pipe section 1012. When the annular protective part 103 and the second pipe section 1012 are separate, the annular protective part 103 and the second pipe section 1012 can be fixed by welding, interference fit or other methods.

[0039] The materials of the annular protective part 103, the pipe fitting 101, and the end cap 102 can be the same or different. Using the same material is beneficial for the annular protective part 103 to be integrated with the pipe fitting 101 or the end cap 102 or to be welded and fixed. Using different materials is beneficial for the annular protective part 103 to be made of a material with better cushioning performance, so as to further reduce the degree of deformation of the pipe fitting 101 when it is subjected to impact through buffering and energy absorption.

[0040] like Figure 7 As shown, the difference between this embodiment and the first embodiment described above is that in this embodiment, the pipe fitting 101 is an integral structure, and the valve body component 100 no longer has an end cap 102.

[0041] like Figure 7 As shown, the annular protective part 103 is disposed on the outer periphery of the pipe fitting 101. The annular protective part 103 and the pipe fitting 101 can be integral or separate. When the annular protective part 103 and the pipe fitting 101 are separate, they can be fixed to the pipe fitting 101 by welding, interference fit, or other methods.

[0042] When the annular protective part 103 and the pipe fitting 101 are separate structures, such as Figure 8 As shown, the annular protective part 103 may include a sleeve 1031 and an annular boss 1032. The annular boss 1032 is integrally disposed on the outer periphery of the sleeve 1031, and the axial length of the sleeve 1031 is greater than the axial length of the annular boss 1032. Because the axial length of the sleeve 1031 is larger (greater than the axial length of the annular boss 1032), the reliability of the fixation between the annular protective part 103 and the valve 101 can be ensured. Moreover, the sidewall thickness of the sleeve 1031 can be set to be thinner to avoid the annular protective part 103 excessively increasing the weight of the solenoid valve.

[0043] Specifically, on a projection plane perpendicular to the axial direction of the pipe fitting 101, the radial distance between the orthographic projection outer contour of the annular protective portion 103 and the orthographic projection outer contour of the pipe fitting 101 is greater than, equal to, or less than the sidewall thickness of the pipe fitting 101. For example, Figure 1 and Figure 2 In the illustrated embodiment, the radial distance L1 between the orthographic projection outer contour of the annular protective portion 103 and the orthographic projection outer contour of the pipe 101 is less than the sidewall thickness L2 of the first pipe segment 1011 and also less than the sidewall thickness L3 of the second pipe segment 1012. For example, Figure 9 In the embodiment shown, the radial distance L1 between the orthographic projection outer contour of the annular protective part 103 and the orthographic projection outer contour of the pipe 101 is set to be large, which is greater than the sidewall thickness L2 of the first pipe section 1011 and also greater than the sidewall thickness L3 of the second pipe section 1012.

[0044] The working process of the solenoid valve in the first embodiment is explained below:

[0045] In the event of a power outage, such as Figure 1 As shown, the pilot valve core 600 seals the pilot valve port 4011b under the pressure of the spring 200, and the piston 400 seals the main valve port 501. When energized, the moving iron core 300 moves upward against the elastic force of the spring 200 due to the electromagnetic attraction of the stationary iron core 1100. The pilot valve core 600 moves upward accordingly, opening the pilot valve port 4011b. At this time, the fluid above the piston 400 flows through the pilot valve port 4011b, the second axial through-hole 4013, and the third axial through-hole 502 to the first connecting pipe 700, creating a low-pressure area above the piston 400 and a high-pressure area below it. Under the pressure difference, the piston 400 moves upward, opening the main valve port 501, allowing the first connecting pipe 700 to connect to the valve chamber 1000 through the main valve port 501.

[0046] The above examples illustrate the principles and implementation methods of this application. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A solenoid valve, characterized in that, The solenoid valve includes a valve body component (100), a piston (200), and a moving iron core (300). The valve body component (100) includes a pipe (101) and an annular protective part (103). The moving iron core (300) and the piston (200) are located inside the pipe (101) and can move along the axial direction of the pipe (101). The annular protective part (103) is arranged around the central axis of the pipe (101). On the projection plane perpendicular to the central axis of the pipe (101), the outer contour of the annular protective part (103) is located on the outer periphery of the outer contour of the pipe (101).

2. The solenoid valve according to claim 1, characterized in that, The pipe fitting (101) includes a first pipe section (1011) and a second pipe section (1012) that are separately arranged. The moving iron core (300) is at least partially located in the first pipe section (1011), and the piston (200) is located in the second pipe section (1012). The outer diameter of the second pipe section (1012) is larger than the outer diameter of the first pipe section (1011). The axial ends of the first pipe section (1011) are defined as the first end (A) and the second end (B), respectively. The second pipe section (1012) has a third end (C) and a fourth end (D) at its two axial ends. The valve body component (100) includes an end cap (102) located at the port of the third end (C) of the second pipe section (1012). The end cap (102) is provided with a mounting hole (E). The second end (B) of the first pipe section (1011) is located in the mounting hole (E) and in the third end (C) of the second pipe section (1012).

3. The solenoid valve according to claim 2, characterized in that, The annular protective part (103) is disposed on the outer periphery of the first pipe section (1011), the outer periphery of the second pipe section (1012), or the outer periphery of the end cap (102); The annular protective portion (103) is integrally formed with the first pipe segment (1011), the second pipe segment (1012), or the end cap (102); or, The annular protective part (103) is a separate structure from the first pipe section (1011), the second pipe section (1012), and the end cap (102).

4. The solenoid valve according to claim 2, characterized in that, The end cap (102) includes a cap body (1021) located within the second pipe section (1012) and a stop portion (1022) disposed at one end of the cap body (1021). The stop portion (1022) abuts against the end face of the third end (C) of the second pipe section (1012). The annular protective portion (103) is disposed on the outer periphery of the stop portion (1022). The annular protective portion (103) and the end cap (102) are integrally formed.

5. The solenoid valve according to claim 2, characterized in that, The annular protective part (103), the end cap (102), and the pipe (101) are made of the same material.

6. The solenoid valve according to claim 1, characterized in that, The pipe fitting (101) is an integral structure, and the annular protective part (103) is disposed on the outer periphery of the pipe fitting (101). The annular protective part (103) and the pipe fitting (101) are integral structures or the annular protective part (103) and the pipe fitting (101) are separate structures.

7. The solenoid valve according to claim 6, characterized in that, The annular protective part (103) which is separate from the pipe fitting (101) includes a sleeve (1031) and an annular boss (1032). The annular boss (1032) is integrally disposed on the outer periphery of the sleeve (1031), and the axial length of the annular boss (1032) is shorter than the axial length of the sleeve (1031).

8. The solenoid valve according to any one of claims 1-7, characterized in that, On the projection plane perpendicular to the central axis of the pipe (101), the radial distance between the orthographic outer contour of the annular protective part (103) and the orthographic outer contour of the pipe (101) is greater than or equal to or less than the sidewall thickness of the pipe (101).

9. The solenoid valve according to any one of claims 1-7, characterized in that, The moving iron core (300) includes a first guide column section (301), which is in clearance fit with the pipe fitting (101). When the solenoid valve is closed, the orthographic projection of the annular protective part (103) falls within the orthographic projection range of the first guide column section (301) on the projection plane parallel to the central axis of the pipe fitting (101).

10. The solenoid valve according to claim 9, characterized in that, When the solenoid valve is closed, the annular protective part (103) is located on the side of the piston (200) close to the moving iron core (300). The two end faces of the moving iron core (300) in the axial direction are defined as the first end face (F) and the second end face (G). The first end face (F) is located on the side of the annular protective part (103) away from the piston (200), and the second end face (G) is located on the side of the annular protective part (103) close to the piston (200). The axial distance H1 between the annular protective part (103) and the first end face (F) is greater than the axial distance H2 between the annular protective part (103) and the second end face (G).

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