Electromagnetic valve and low-temperature drainage device with same

Abstract

The utility model provides an electromagnetic valve and a low-temperature drainage device with the electromagnetic valve, the electromagnetic valve comprises a connecting seat, the connecting seat is provided with a first connecting hole, a first channel and a second channel, the first channel and the second channel are communicated with each other, the joint of the first channel and the second channel is provided with a valve port, and the first connecting hole is communicated with the valve port; the valve body structure is detachably arranged at the first connecting hole, the valve body structure is provided with a communicating opening and a containing cavity which communicate with each other, and the communicating opening communicates with the first connecting hole; the driving assembly is arranged in the accommodating cavity and the first connecting hole; and the piston assembly is movably arranged between the valve body structure and the valve port, the driving assembly is in driving connection with the piston assembly, and the piston assembly can block or open the valve port. According to the technical scheme, the problem that the universality of an electromagnetic valve is poor due to the fact that the flow range of the electromagnetic valve in the prior art is small can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature drainage devices, and in particular to a solenoid valve and a low-temperature drainage device having the same. Background Art

[0002] like Figure 1 and Figure 2 As shown, in the prior art, the low-temperature drainage device includes an air intake valve structure 5, a solenoid valve, an antifreeze valve structure 6 and a three-way joint. The air intake valve structure 5, the solenoid valve and the antifreeze valve structure 6 are all detachably connected to the three-way joint. The solenoid valve is connected in series with the antifreeze valve structure 6, and along the flow direction of the fluid, the solenoid valve is arranged upstream of the antifreeze valve structure 6.

[0003] Specifically, the three-way connector 1 is provided with an inlet 101, a mounting hole 103 and an outlet 102 which are connected in sequence. The solenoid valve is detachably arranged at the mounting hole 103, and the solenoid valve comprises a valve seat 2, a valve needle assembly 3 and an attractor 4. The valve seat 2 comprises a water inlet 201, a valve cavity 202 and a water outlet 203. The valve needle assembly 3 comprises a valve needle body 301 and a valve needle spring 302. The water inlet 201 and the water outlet 203 are both connected to the valve cavity 202, and the water inlet 201 is connected to the inlet 101, and the water outlet 203 is connected to the mounting hole 103. The valve needle assembly 3 is movably arranged in the valve cavity 202, and the valve needle body 301 can block or open the water outlet 203, the valve needle spring 302 can drive the valve needle body 301 to open the water outlet 203, and the attractor 4 can drive the valve needle body 301 to block the water outlet 203. When the fluid flows in the low-temperature drainage device, the fluid will flow through the inlet 101 , the water inlet 201 and the valve chamber 202 in sequence, then flow into the installation hole 103 through the outlet 203 , and finally be discharged through the outlet 102 .

[0004] However, with such an arrangement, when the fluid flows through the solenoid valve, it will enter the interior of the valve chamber 202. Since the valve needle assembly 3 occupies part of the flow area of ​​the valve chamber 202, the flow rate of the solenoid valve is limited, reducing the versatility of the solenoid valve, and further limiting the flow rate of the low-temperature drainage device, making it difficult for the low-temperature drainage device to meet the use requirements of more occasions. Utility Model Content

[0005] The utility model provides a solenoid valve and a low-temperature drainage device having the same, so as to solve the problem that the solenoid valve in the prior art has a small flow range, thereby resulting in poor versatility of the solenoid valve.

[0006] According to one aspect of the utility model, a solenoid valve is provided, which includes: a connecting seat, the connecting seat having a first connecting hole and a first channel and a second channel connected to each other, the connection between the first channel and the second channel having a valve port, the first connecting hole being connected to the valve port; a valve body structure, detachably arranged at the first connecting hole, the valve body structure having a connecting port and a accommodating chamber connected to each other, the connecting port being connected to the first connecting hole; a driving assembly, arranged in the accommodating chamber and the first connecting hole; a piston assembly, movably arranged between the valve body structure and the valve port, the driving assembly being drivingly connected to the piston assembly, and the piston assembly being capable of blocking or opening the valve port.

[0007] Furthermore, the piston assembly includes a piston body, and a fixing groove is provided at one end of the piston body close to the valve port. A sealing member is provided in the fixing groove. When the piston assembly blocks the valve port, the valve port abuts against the sealing member.

[0008] Furthermore, a first riveted portion is provided at the opening of the fixing groove, and the piston assembly further comprises a gasket, which is provided between the sealing member and the first riveted portion, and the gasket cooperates with the first riveted portion to fix the sealing member.

[0009] Further, the first channel includes a circulation channel and a fluid inlet that are interconnected, one end of the fluid inlet is connected to the circulation channel, the other end of the fluid inlet is connected to the valve port, an angle is formed between the axis of the circulation channel and the axis of the fluid inlet, and an angle is formed between the axis of the fluid inlet and the axis of the valve port; the second channel has a fluid outlet at one end close to the valve port, the fluid outlet is connected to the first connecting hole, and an angle is formed between the axis of the second channel and the axis of the valve port.

[0010] Furthermore, the piston assembly has a relatively arranged avoidance position away from the valve port and a blocking position blocking the valve port, and the driving assembly includes: a first reset member, arranged between the piston assembly and the valve port, to drive the piston assembly to move from the blocking position to the avoidance position; a moving iron core, movably arranged in the accommodating cavity; a stationary iron core, arranged in the accommodating cavity, and arranged at one end of the moving iron core close to the connecting port, and a first through hole is arranged on the stationary iron core; a second reset member, arranged between the moving iron core and the stationary iron core, to drive the moving iron core to move in a direction away from the stationary iron core; a push rod, the push rod is passed through the first through hole, one end of the push rod abuts against the moving iron core, and the other end of the push rod abuts against the piston assembly, and the moving iron core can drive the piston assembly from the avoidance position to the blocking position through the push rod.

[0011] Furthermore, a placement groove is provided on the side of the piston body away from the valve port, and an elastic structure is provided in the placement groove. The push rod abuts against the elastic structure, so that when the piston assembly blocks the valve port, the moving iron core and the push rod can move toward the valve port under the drive of the static iron core.

[0012] Furthermore, a mounting cavity is provided on one side of the piston body close to the valve port, the mounting cavity and the placement groove are independently provided, and a first sealing ring is provided between the piston body and the inner wall of the first connecting hole.

[0013] Furthermore, the elastic structure includes an elastic member and a baffle, the baffle is arranged at the opening of the placement groove, the elastic member is arranged inside the placement groove, the push rod abuts against the baffle, one end of the elastic member abuts against the baffle, and the other end of the elastic member abuts against the inner wall of the placement groove, and a second riveted portion is arranged at the opening of the placement groove, and the baffle cooperates with the second riveted portion to fix the elastic member.

[0014] Furthermore, the valve body structure includes a valve body and a valve cover, a receiving cavity is provided between the valve body and the valve cover, the valve body is arranged away from the valve port relative to the valve cover, the valve cover is detachably arranged at the first connecting hole, a second through hole is provided on the valve cover, and the push rod is sequentially passed through the first through hole and the second through hole to abut against the piston assembly.

[0015] Furthermore, the push rod has a first step section and a second step section connected to each other, the diameter of the first step section is larger than the diameter of the second step section, a first step surface is provided between the first step section and the second step section, the second through hole includes a first step hole and a second step hole connected to each other, the diameter of the first step hole is larger than the diameter of the second step hole, a second step surface is provided between the first step hole and the second step hole, the first step surface can abut against the second step surface, and the first step surface and the second step surface cooperate to limit the axial position of the push rod.

[0016] Furthermore, a protrusion is provided on the outer periphery of the static iron core at one end close to the valve port, the end of the valve body close to the valve port abuts against the protrusion, and the static iron core abuts against the valve cover.

[0017] According to another aspect of the utility model, a low-temperature drainage device is provided, which includes an air intake valve, an antifreeze valve and the solenoid valve provided above, wherein a section of the first channel of the connecting seat of the solenoid valve away from the valve port has a second connecting hole, and an end of the second channel of the connecting seat away from the valve port has a third connecting hole, the air intake valve is detachably arranged at the second connecting hole, and the antifreeze valve is detachably arranged at the third connecting hole.

[0018] By applying the technical solution of the utility model, the connection between the first channel and the second channel of the connecting seat has a valve port, the valve body structure is detachably arranged in the first connecting hole, and the first connecting hole is connected to the valve port, the piston assembly is arranged in the first connecting hole, and the piston assembly is arranged between the valve body structure and the valve port, and the driving assembly can drive the piston assembly to block or open the valve port. In this arrangement, since the piston assembly is arranged between the valve body structure and the valve port, the piston assembly will not enter the inside of the valve port during movement, and the fluid flows directly at the valve port, which can ensure the flow at the valve port, thereby improving the flow of the solenoid valve, and further improving the versatility of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the structure of a low-temperature drainage device in the prior art is shown;

[0021] Figure 2 Shows Figure 1 A partial enlarged view of the middle A;

[0022] Figure 3 It shows a schematic structural diagram of the solenoid valve provided by the utility model in a power-off state;

[0023] Figure 4 A schematic diagram showing the structure of the solenoid valve provided by the utility model in the energized state;

[0024] Figure 5 Shows Figure 4 A partial enlarged view of point B in the middle;

[0025] Figure 6 Shows Figure 4 A partial enlarged view of point C in the middle;

[0026] Figure 7 The structure diagram of the piston assembly provided by the utility model is shown;

[0027] Figure 8 It shows a schematic structural diagram of the low-temperature drainage device provided by the utility model when the solenoid valve is in a power-off state;

[0028] Fig. 9 The schematic diagram shows the structure of the low-temperature drainage device provided by the utility model when the solenoid valve is powered on.

[0029] The above drawings include the following reference numerals:

[0030] 10. Connecting seat; 11. First connecting hole;

[0031] 12, first channel; 121, circulation channel; 122, fluid inlet; 123, second connecting hole;

[0032] 13. Second channel; 131. Fluid outlet; 132. Third connecting hole; 14. Valve port;

[0033] 20. Valve body structure; 21. Accommodating chamber; 22. Valve body;

[0034] 23. Valve cover; 231. Second through hole; 2311. Second step surface; 24. End cap;

[0035] 30. driving assembly; 31. first reset member; 32. moving iron core;

[0036] 33. static iron core; 331. first through hole; 332. raised portion; 34. second reset member;

[0037] 35. push rod; 351. first step surface;

[0038] 40. Piston assembly;

[0039] 41, piston body; 411, fixing groove; 4111, first riveting part; 412, placement groove; 4121, second riveting part;

[0040] 42. seal; 43. gasket;

[0041] 44. elastic structure; 441. elastic member; 442. baffle;

[0042] 45. mounting cavity; 46. first sealing ring;

[0043] 110, air intake valve; 120, antifreeze valve;

[0044] 1. Three-way joint; 101. Inlet; 102. Outlet; 103. Mounting hole;

[0045] 2. Valve seat; 201. Water inlet; 202. Valve cavity; 203. Water outlet;

[0046] 3. Valve needle assembly; 301. Valve needle body; 3011. Water-facing part; 302. Valve needle spring; 4. Attractor;

[0047] 5. Intake valve structure; 6. Antifreeze valve structure. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0049] like Figures 3 to 7 As shown, an embodiment of the utility model provides a solenoid valve, which includes a connecting seat 10, a valve body structure 20, a driving assembly 30 and a piston assembly 40. The connecting seat 10 has a first connecting hole 11 and a first channel 12 and a second channel 13 that are interconnected. The connection of the first channel 12 and the second channel 13 has a valve port 14, and the first connecting hole 11 is connected to the valve port 14. The valve body structure 20 is detachably arranged at the first connecting hole 11, and the valve body structure 20 has a connecting port and a receiving chamber 21 that are interconnected, and the connecting port is connected to the first connecting hole 11. The driving assembly 30 is arranged in the receiving chamber 21 and the first connecting hole 11. The piston assembly 40 is movably arranged between the valve body structure 20 and the valve port 14, and the driving assembly 30 is drivingly connected to the piston assembly 40, and the piston assembly 40 can block or open the valve port 14.

[0050] By applying the technical solution of the present application, the connection between the first channel 12 and the second channel 13 of the connection seat 10 is provided with a valve port 14, the valve body structure 20 is detachably arranged in the first connection hole 11, and the first connection hole 11 is communicated with the valve port 14, the piston assembly 40 is arranged in the first connection hole 11, and the piston assembly 40 is arranged between the valve body structure 20 and the valve port 14, and the driving assembly 30 can drive the piston assembly 40 to block or open the valve port 14. In this arrangement, since the piston assembly 40 is arranged between the valve body structure 20 and the valve port 14, the piston assembly 40 will not enter the inside of the valve port 14 during the movement, and the fluid flows directly at the valve port 14, which can ensure the flow at the valve port 14, thereby improving the flow of the solenoid valve, and further improving the versatility of the solenoid valve.

[0051] Among them, in the prior art, such as Figure 2As shown, the valve needle body 301 has a blocking end, and two conical protrusions are arranged in an axial ring at the blocking end, and the second sealing ring is arranged between the two conical protrusions, wherein the conical protrusion close to the attractor 4 will form a water-facing portion 3011, and impurities in the fluid are easy to accumulate in the water-facing portion 3011, and the flow area of ​​the water outlet 203 is small. Generally, the inner diameter of the water outlet 203 is 4.8 mm, and the outer diameter of the top of the valve needle body 301 is 4.2 mm. When impurities continue to accumulate, the flow rate of the water outlet 203 is reduced and there is even a risk of blockage, which makes the solenoid valve unable to close, thereby reducing the stability of the solenoid valve.

[0052] However, in the present application, since there is no water-facing structure on the piston assembly 40, impurities are not easy to accumulate on the piston assembly 40, and thus will not affect the flow of the fluid at the valve port 14, thereby preventing impurities from clogging the valve port 14, thereby ensuring the normal switching of the solenoid valve, thereby improving the stability of the solenoid valve.

[0053] like Figure 7 As shown, the piston assembly 40 includes a piston body 41, and a fixing groove 411 is provided at one end of the piston body 41 close to the valve port 14. A sealing member 42 is provided in the fixing groove 411. When the piston assembly 40 blocks the valve port 14, the valve port 14 abuts against the sealing member 42. Such a configuration can ensure the sealing effect of the piston assembly 40 on the valve port 14 and prevent fluid leakage. In addition, it is convenient to process the piston body 41 and fix the sealing member 42 on the piston body 41.

[0054] Specifically, a first rivet portion 4111 is provided at the opening of the fixing groove 411, and the piston assembly 40 further includes a gasket 43, which is provided between the sealing member 42 and the first rivet portion 4111, and the gasket 43 cooperates with the first rivet portion 4111 to fix the sealing member 42. In this way, the gasket 43 can protect the sealing member 42 and prevent the first rivet portion 4111 from damaging the sealing member 42. In addition, the first rivet portion 4111 is used to fix the gasket 43 and the sealing member 42, which has a simple structure and is easy to process.

[0055] Further, the first channel 12 includes a circulation channel 121 and a fluid inlet 122 that are interconnected, one end of the fluid inlet 122 is connected to the circulation channel 121, and the other end of the fluid inlet 122 is connected to the valve port 14. There is an angle between the axis of the circulation channel 121 and the axis of the fluid inlet 122, and there is an angle between the axis of the fluid inlet 122 and the axis of the valve port 14. In the present application, the axis of the circulation channel 121 is perpendicular to the axis of the fluid inlet 122, and the axis of the fluid inlet 122 is perpendicular to the axis of the valve port 14. The second channel 13 has a fluid outlet 131 at one end close to the valve port 14, and the fluid outlet 131 is connected to the first connecting hole 11. There is an angle between the axis of the second channel 13 and the axis of the valve port 14, and in the present application, the axis of the second channel 13 is perpendicular to the axis of the valve port 14. Such a configuration facilitates the processing of the first channel 12, the second channel 13 and the valve port 14, and facilitates the sealing member 42 to seal the valve port 14.

[0056] Among them, in the prior art, the inlet 101 and the outlet 102 are eccentrically arranged relative to the three-way joint 1, which increases the difficulty of processing the inlet 101 and the outlet 102. However, in the present application, the fluid inlet 122 and the fluid outlet 131 are coaxially arranged relative to the connecting seat 10, so that the processing difficulty of the fluid inlet 122 and the fluid outlet 131 can be reduced, and damage to the connecting seat 10 can be avoided.

[0057] Specifically, the piston assembly 40 has a relatively arranged avoidance position away from the valve port 14 and a blocking position blocking the valve port 14. Figure 3 As shown, when the solenoid valve is in the de-energized state, the piston assembly 40 is in the avoidance position; Figure 4 As shown, when the solenoid valve is in an energized state, the piston assembly 40 is located in a blocking position.

[0058] The driving assembly 30 includes a first reset member 31, a moving iron core 32, a static iron core 33, a second reset member 34 and a push rod 35. The first reset member 31 is arranged between the piston assembly 40 and the valve port 14 to drive the piston assembly 40 to move from the blocking position to the avoidance position. The moving iron core 32 is movably arranged in the accommodating chamber 21. The static iron core 33 is arranged in the accommodating chamber 21 and is arranged at one end of the moving iron core 32 close to the connecting port, and a first through hole 331 is arranged on the static iron core 33. The second reset member 34 is arranged between the moving iron core 32 and the static iron core 33 to drive the moving iron core 32 to move in a direction away from the static iron core 33. The push rod 35 is penetrated in the first through hole 331, one end of the push rod 35 abuts against the moving iron core 32, and the other end of the push rod 35 abuts against the piston assembly 40. The moving iron core 32 can drive the piston assembly 40 to move from the avoidance position to the blocking position through the push rod 35. When the solenoid valve is switched to the power-on state, the static iron core 33 attracts the moving iron core 32 to move toward the valve port 14, and the moving iron core 32 can drive the push rod 35 and the piston assembly 40 to move toward the valve port 14, so that the piston assembly 40 blocks the valve port 14. When the solenoid valve is switched to the power-off state, the second reset member 34 drives the moving iron core 32 to move away from the valve port 14, and the second reset member 34 drives the piston assembly 40 and the push rod 35 to move away from the valve port 14, so that the piston assembly 40 opens the valve port 14. Among them, the first reset member 31 and the second reset member 34 are both springs.

[0059] Furthermore, a placement groove 412 is provided on one side of the piston body 41 away from the valve port 14, and an elastic structure 44 is provided in the placement groove 412. The push rod 35 abuts against the elastic structure 44, so that when the piston assembly 40 blocks the valve port 14, the moving iron core 32 and the push rod 35 can move toward the valve port 14 under the drive of the static iron core 33. With such a configuration, when the piston assembly 40 is in the blocking position, the push rod 35 and the moving iron core 32 can continue to move toward the valve port 14. With such a configuration, the moving iron core 32 and the static iron core 33 can be in close contact with each other, thereby ensuring the reliability of the operation of the solenoid valve.

[0060] Among them, a mounting cavity 45 is provided on the side of the piston body 41 close to the valve port 14, the mounting cavity 45 and the placement groove 412 are independently provided, and the placement groove 412 and the mounting cavity 45 are arranged opposite to each other, and a first sealing ring 46 is provided between the piston body 41 and the inner wall of the first connecting hole 11, and the first sealing ring 46 is arranged around the outer periphery of the placement groove 412. Such an arrangement can prevent the fluid from flowing into the placement groove 412 and the accommodating cavity 21, further improve the working stability of the solenoid valve, and ensure the normal flow of the fluid. In addition, the first sealing ring is arranged on the side of the mounting cavity 45 away from the valve port 14 to prevent fluid leakage, and the mounting cavity 45 is arranged corresponding to the valve port 14. When the fluid flows at the valve port 14, the mounting cavity 45 can play a buffering role, further facilitating the flow of the fluid.

[0061] Furthermore, the installation cavity 45 is arranged in the middle of the fixing groove 411, the installation cavity 45 and the fixing groove 411 are arranged independently, and the side wall of the installation cavity 45 is bent toward the fixing groove 411 to form the first riveted portion 4111. Such arrangement facilitates the processing of the first riveted portion 4111, has a simple structure, and is easy to operate.

[0062] Specifically, the elastic structure 44 includes an elastic member 441 and a baffle 442, wherein the baffle 442 is arranged at the opening of the placement groove 412, the elastic member 441 is arranged inside the placement groove 412, the push rod 35 abuts against the baffle 442, one end of the elastic member 441 abuts against the baffle 442, and the other end of the elastic member 441 abuts against the inner wall of the placement groove 412, and a second riveted portion 4121 is arranged at the opening of the placement groove 412, and the baffle 442 cooperates with the second riveted portion 4121 to fix the elastic member 441. In this way, the baffle 442 cooperates with the second riveted portion 4121 to prevent the elastic member 441 from falling off from the placement groove 412, and the push rod 35 abuts against the baffle 442, which can ensure the uniformity of the push rod 35 when applying force to the piston assembly 40, ensure that the piston assembly 40 can be evenly stressed, and then ensure the sealing effect of the piston assembly 40 on the valve port 14. In addition, a second riveting portion 4121 is provided at the opening of the placement groove 412 , which has a simple structure and is convenient for processing the placement groove 412 .

[0063] The valve body structure 20 includes a valve body 22 and a valve cover 23, and a receiving chamber 21 is provided between the valve body 22 and the valve cover 23. The valve body 22 is arranged away from the valve port 14 relative to the valve cover 23, and the valve cover 23 is detachably arranged at the first connecting hole 11. The valve cover 23 is provided with a second through hole 231, and the push rod 35 is sequentially inserted into the first through hole 331 and the second through hole 231 to abut against the piston assembly 40. With such an arrangement, the structure is simple and it is convenient to assemble the valve body structure 20. Moreover, in the present application, the valve body structure 20 also includes a sealing head 24, which is arranged at one end of the valve body 22 away from the valve port 14. At the same time, in the present application, the valve body 22, the valve cover 23 and the static iron core 33 are welded and fixed, and the sealing is pressed onto the valve body 22 and then fixed by welding.

[0064] Further, the push rod 35 has a first step section and a second step section connected to each other, the diameter of the first step section is greater than the diameter of the second step section, and a first step surface 351 is provided between the first step section and the second step section. The second through hole 231 includes a first step hole and a second step hole connected to each other, the diameter of the first step hole is greater than the diameter of the second step hole, and a second step surface 2311 is provided between the first step hole and the second step hole. The first step surface 351 can abut against the second step surface 2311, and the first step surface 351 cooperates with the second step surface 2311 to limit the push rod 35 axially. Such a setting can prevent the push rod 35 from falling off from the second through hole 231, thereby ensuring the normal operation of the push rod 35, and further ensuring the normal operation of the solenoid valve. Among them, in actual use, when the piston assembly 40 is located in the blocking position, the first step surface 351 can abut against the second step surface 2311, or it can not abut against the second step surface 2311.

[0065] Specifically, a protrusion 332 is provided on the outer periphery of the static iron core 33 at one end close to the valve port 14, and the end of the valve body 22 close to the valve port 14 abuts against the protrusion 332, and the static iron core 33 abuts against the valve cover 23. Such a configuration facilitates the assembly of the valve cover 23, the static iron core 33 and the valve body 22, and also facilitates the welding of the valve cover 23, the static iron core 33 and the valve body 22.

[0066] like Figure 8 and Fig. 9 As shown, another embodiment of the utility model provides a low-temperature drainage device, which includes an air intake valve 110, an antifreeze valve 120 and the solenoid valve provided above. A section of the first channel 12 of the connection seat 10 of the solenoid valve away from the valve port 14 has a second connection hole 123, and an end of the second channel 13 of the connection seat 10 away from the valve port 14 has a third connection hole 132. The air intake valve 110 is detachably arranged at the second connection hole 123, and the antifreeze valve 120 is detachably arranged at the third connection hole 132. The solenoid valve and the antifreeze valve 120 are arranged in series, and the solenoid valve is located upstream of the antifreeze valve 120. Only when the solenoid valve and the antifreeze valve 120 are opened at the same time, can the fluid be discharged through the antifreeze valve 120. In the present application, the solenoid valve is arranged in this way, and the reliability of the low-temperature drainage device is improved, and the fluid is prevented from being discharged from the antifreeze valve 120 when the fluid does not need to be discharged. Furthermore, the solenoid valve with the above structure can increase the flow rate of the solenoid valve and improve the versatility of the solenoid valve, thereby increasing the flow rate of the low-temperature drainage device, so that the low-temperature drainage device can meet the use requirements of more occasions.

[0067] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0068] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0069] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0070] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0071] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0072] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A solenoid valve, It is characterized in that The solenoid valve comprises: A connecting seat (10), the connecting seat (10) comprising a first connecting hole (11) and a first channel (12) and a second channel (13) which are connected to each other, a valve port (14) being provided at the connection between the first channel (12) and the second channel (13), the first connecting hole (11) being connected to the valve port (14); a valve body structure (20) detachably arranged at the first connecting hole (11), the valve body structure (20) comprising a communication port and a receiving cavity (21) which are in communication with each other, the communication port being in communication with the first connecting hole (11); A driving assembly (30) disposed in the accommodating cavity (21) and the first connecting hole (11); The piston assembly (40) is movably arranged between the valve body structure (20) and the valve port (14); the drive assembly (30) is drivingly connected to the piston assembly (40); and the piston assembly (40) can block or open the valve port (14).

2. The solenoid valve according to claim 1, It is characterized in that The piston assembly (40) comprises a piston body (41), and a fixing groove (411) is provided at one end of the piston body (41) close to the valve port (14). A sealing member (42) is provided in the fixing groove (411). When the piston assembly (40) blocks the valve port (14), the valve port (14) abuts against the sealing member (42).

3. The solenoid valve according to claim 2, It is characterized in that A first riveted portion (4111) is provided at the opening of the fixing groove (411), and the piston assembly (40) further comprises a gasket (43), wherein the gasket (43) is provided between the sealing member (42) and the first riveted portion (4111), and the gasket (43) cooperates with the first riveted portion (4111) to fix the sealing member (42).

4. The solenoid valve according to claim 1, It is characterized in that The first channel (12) comprises a circulation channel (121) and a fluid inlet (122) which are connected to each other, one end of the fluid inlet (122) is connected to the circulation channel (121), and the other end of the fluid inlet (122) is connected to the valve port (14), an angle is formed between the axis of the circulation channel (121) and the axis of the fluid inlet (122), and an angle is formed between the axis of the fluid inlet (122) and the axis of the valve port (14); the second channel (13) has a fluid outlet (131) at one end close to the valve port (14), the fluid outlet (131) is connected to the first connecting hole (11), and an angle is formed between the axis of the second channel (13) and the axis of the valve port (14).

5. The solenoid valve according to claim 2, It is characterized in that The piston assembly (40) has a relatively arranged avoidance position away from the valve port (14) and a blocking position blocking the valve port (14), and the drive assembly (30) comprises: A first restoring member (31) is arranged between the piston assembly (40) and the valve port (14) to drive the piston assembly (40) to move from the blocking position to the avoidance position; A moving iron core (32) is movably disposed in the accommodating cavity (21); A static iron core (33) is arranged in the accommodating cavity (21) and at one end of the moving iron core (32) close to the communicating port, and a first through hole (331) is provided on the static iron core (33); A second reset member (34) is arranged between the moving iron core (32) and the stationary iron core (33) to drive the moving iron core (32) to move in a direction away from the stationary iron core (33); A push rod (35), wherein the push rod (35) is inserted into the first through hole (331), one end of the push rod (35) is in contact with the moving iron core (32), and the other end of the push rod (35) is in contact with the piston assembly (40), and the moving iron core (32) can drive the piston assembly (40) to move from the avoidance position to the blocking position through the push rod (35).

6. The solenoid valve according to claim 5, It is characterized in that A placement groove (412) is provided on the side of the piston body (41) away from the valve port (14), and an elastic structure (44) is provided in the placement groove (412). The push rod (35) abuts against the elastic structure (44), so that when the piston assembly (40) blocks the valve port (14), the moving iron core (32) and the push rod (35) can move toward the valve port (14) under the drive of the static iron core (33).

7. The solenoid valve according to claim 6, It is characterized in that A mounting cavity (45) is provided on one side of the piston body (41) close to the valve port (14); the mounting cavity (45) and the placement groove (412) are independently provided with each other; and a first sealing ring (46) is provided between the piston body (41) and the inner wall of the first connecting hole (11).

8. The solenoid valve according to claim 6, It is characterized in that The elastic structure (44) comprises an elastic member (441) and a baffle (442); the baffle (442) is arranged at the opening of the placement groove (412); the elastic member (441) is arranged inside the placement groove (412); the push rod (35) abuts against the baffle (442); one end of the elastic member (441) abuts against the baffle (442); the other end of the elastic member (441) abuts against the inner wall of the placement groove (412); a second rivet portion (4121) is arranged at the opening of the placement groove (412); the baffle (442) cooperates with the second rivet portion (4121) to fix the elastic member (441).

9. The solenoid valve according to claim 5, It is characterized in that The valve body structure (20) comprises a valve body (22) and a valve cover (23), wherein the accommodating cavity (21) is provided between the valve body (22) and the valve cover (23), the valve body (22) is arranged away from the valve port (14) relative to the valve cover (23), the valve cover (23) is detachably arranged at the first connecting hole (11), and a second through hole (231) is provided on the valve cover (23), and the push rod (35) is sequentially penetrated into the first through hole (331) and the second through hole (231) to abut against the piston assembly (40).

10. The solenoid valve according to claim 9, It is characterized in that The push rod (35) has a first step section and a second step section connected to each other, the diameter of the first step section is larger than the diameter of the second step section, a first step surface (351) is provided between the first step section and the second step section, the second through hole (231) includes a first step hole and a second step hole connected to each other, the diameter of the first step hole is larger than the diameter of the second step hole, a second step surface (2311) is provided between the first step hole and the second step hole, the first step surface (351) can abut against the second step surface (2311), and the first step surface (351) cooperates with the second step surface (2311) to limit the axial position of the push rod (35).

11. The solenoid valve according to claim 9, It is characterized in that A protrusion (332) is provided on the outer periphery of the static iron core (33) at one end close to the valve port (14); an end of the valve body (22) close to the valve port (14) abuts against the protrusion (332); and the static iron core (33) abuts against the valve cover (23).

12. A low temperature drainage device, It is characterized in that The low-temperature drainage device comprises an air intake valve (110), an antifreeze valve (120) and a solenoid valve according to any one of claims 1 to 11, wherein a first channel (12) of a connecting seat (10) of the solenoid valve has a second connecting hole (123) at a section away from the valve port (14), and a second channel (13) of the connecting seat (10) has a third connecting hole (132) at one end away from the valve port (14), the air intake valve (110) is detachably arranged at the second connecting hole (123), and the antifreeze valve (120) is detachably arranged at the third connecting hole (132).

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