Waterproof automobile charging pile

Abstract

The invention belongs to the technical field of charging piles, and provides a waterproof automobile charging pile which comprises a shell, a mounting cavity, a first placement cavity and a second placement cavity are formed in the shell, a charging equipment body is arranged in the mounting cavity, and a protection box communicating with the second placement cavity is fixedly mounted on one side of the shell. A cleaning pipe is rotatably mounted on the bottom surface of the protection box, so that the technical problem that in the prior art, when cables are collected, a large amount of rainwater is carried to enter the charging box, and consequently the charging box is prone to electric leakage and short circuit is solved. The cleaning brush cleans the surface of the cable, meanwhile, a large amount of rainwater on the surface of the cable is blown away downwards through high-speed flowing air, the rainwater can flow downwards along the cable and is separated, and therefore the situation that a large amount of rainwater enters the shell is avoided, and the cable surface cleaning device can be widely applied to the operation scene of cable surface cleaning.

Description

Technical Field

[0001] The invention belongs to the technical field of charging piles, and in particular relates to a waterproof automobile charging pile. Background Art

[0002] The function of a charging pile is similar to that of a gas pump in a gas station. It is installed in parking lots or charging stations in public buildings and residential communities and can charge various models of electric vehicles according to different voltage levels.

[0003] For charging piles equipped with charging guns, there are charging cables between the charging guns and the charging piles. In rainy weather, the surface of the charging cable is prone to rainwater and soil particles. After charging is completed, the charging cable is usually placed directly in the box of the charging pile. Rainwater and attached soil will also be brought into the box. The attached rainwater entering the box of the charging pile is likely to cause leakage. In response to the above technical problems, a Chinese patent with patent announcement number CN217969281U uses a brush to clean impurities on the surface of the cable and absorbs rainwater on the surface of the cable through a sponge layer during use. However, the sponge layer absorbs limited rainwater. After the sponge layer is saturated with adsorption, rainwater will seep downward from the sponge layer into the box, causing rainwater to enter the box. The rainwater in the box increases the humidity of the air inside the box, which is likely to cause leakage, increasing the risk of use. Summary of the invention

[0004] The purpose of the present invention is to provide a waterproof car charging pile, aiming to solve the technical problem in the prior art that a large amount of rainwater is carried into the charging box when the cables are collected, causing the charging box to easily leak and short-circuit.

[0005] The present invention is implemented as follows: a waterproof automobile charging pile comprises a shell, a mounting cavity, a first placement cavity and a second placement cavity are arranged in the shell, a charging device body is arranged in the mounting cavity, a protection box connected to the second placement cavity is fixedly installed on one side of the shell, a cleaning pipe is rotatably installed on the bottom surface of the protection box, the cleaning pipe is connected to the protection box and a driving module for driving the cleaning pipe to rotate is arranged on the shell, and a cleaning brush is arranged in the cleaning pipe; An air collecting pipe is fixedly installed on the bottom of the protection box, the air collecting pipe and the cleaning pipe are coaxially arranged and rotatably connected to each other, a blowing pipe is provided on the cleaning pipe, the blowing pipe is connected to the air collecting pipe, a fan is fixedly installed on the side of the shell, the fan is connected to the air collecting pipe, the charging device body is connected to a charging gun via a cable, the cable passes through the first placement cavity, the second placement cavity, the protection box and the cleaning pipe in sequence, the charging gun is hung on the side of the shell and a shielding cover is fixedly installed on the side of the shell, a cable winding assembly is provided in the shell and a closing cone is fixedly installed on the end of the cable close to the charging gun.

[0006] Further technical solution: the cleaning brushes are arranged in layers and at intervals, and the blowing pipe and the cleaning brushes are distributed at intervals, the blowing pipe is arranged at an angle with the horizontal plane, and the end of the blowing pipe away from the cleaning pipe is the lower end.

[0007] Further technical solution: The cable winding assembly includes a winding cone, which is fixedly installed in a first placement cavity. A first roller is rotatably installed in the first placement cavity. The first roller is located above the winding cone and is used to change the direction of the cable. A limiting ring is fixedly installed in the first placement cavity and is located between the winding cone and the first roller, and the cable passes through the limiting ring.

[0008] Further technical solution: an elastic membrane is fixedly installed on the side wall between the first placement cavity and the second placement cavity, the elastic membrane covers the hole through which the cable passes, an elastic ring is arranged at the end of the elastic membrane and the elastic ring contacts the surface of the cable.

[0009] Further technical solution: The cable winding assembly also includes a second roller and a third roller. The second roller is rotatably installed in the second placement cavity and driven by the first rotating power piece. A first clamping roller is rotatably installed in the second placement cavity to press the cable against the second roller. The third roller is rotatably installed in the protective box and driven by the second rotating power piece. A second clamping roller is rotatably installed in the protective box to press the cable against the third roller.

[0010] Further technical solution: Two groups of cross bars are fixedly installed in the second placement cavity, the cross bars are permanent magnets, and pairs of sliders are arranged on the cross bars, the sliders are made of iron, and the corresponding two groups of sliders are installed with supporting rollers for rotating together, and a telescopic part parallel to the cross bar is fixedly installed in the second placement cavity, the telescopic part drives the electromagnet to move, and the electromagnet adsorbs the slider after being energized, and the adsorption force of the electromagnet on the slider is greater than the adsorption force of the cross bar on the slider.

[0011] Further technical solution: a mesh plate is fixedly installed at the bottom of the second placement cavity, multiple sets of fans are fixedly installed at the bottom surface of the second placement cavity, and multiple sets of heating tubes located between the mesh plate and the fans are fixedly installed at the bottom of the second placement cavity.

[0012] Further technical solution: a connecting pipe connecting the installation cavity and the second placement cavity is fixedly installed in the shell, and a solenoid valve is fixedly installed on the connecting pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. When not in use, the closing cone closes the lower end of the cleaning tube. At this time, the inside of the shell is isolated from the outside world to prevent rainwater and humid air from entering the shell, thereby improving the waterproof performance of the shell. When the cable is used for recycling on rainy days, the cable moves vertically upward in the cleaning tube. When the cleaning tube rotates, it will drive the cleaning brush to clean the surface of the cable, thereby removing impurities attached to the cable surface due to rainwater. At the same time, the air in the air collecting pipe will be blown out through the blowing pipe, and the air blown out from the blowing pipe will blow to the surface of the cable and the cleaning brush on the lower side. A large amount of rainwater on the cable surface will be blown downward by high-speed air flow, and the rainwater will flow downward along the cable and detach, thereby reducing the rainwater content attached to the cable. At the same time, the fast-flowing air can blow the impurities attached to the cleaning brush downward, thereby realizing the synchronous cleaning of rainwater and impurities on the cable and the cleaning brush, further improving the cleaning effect of the cable, minimizing the amount of rainwater carried by the cable into the second placement cavity, and improving the waterproof performance of the shell.

[0014] 2. The first placement cavity and the second placement cavity are separated by an elastic membrane. Dry cables and wet cables are placed in the first placement cavity and the second placement cavity respectively. After charging is completed, the wet cables can be recovered in time without affecting the dry cables in the shell, thereby further improving the waterproof performance of the charging device.

[0015] 3. The air at the bottom of the second placement chamber is heated by a heating tube, and the air is blown upward by a fan to accelerate the movement. The hot air passes through the mesh plate to dry the wet cables above. Since the wet cables are supported and separated by support rollers, the cables are in a suspended state, so that the hot air can fully contact the surface of the cables for drying, avoiding incomplete drying caused by cable accumulation and squeezing. The second placement chamber reduces the space for the distribution of wet cables, further accelerating the drying of the cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic structural diagram of the first viewing angle of the interior of the shell in the present invention.

[0018] Figure 3 It is a schematic structural diagram of the second viewing angle inside the shell of the present invention.

[0019] Figure 4 It is a schematic structural diagram of the interior of the shell in the present invention from a third viewing angle.

[0020] Figure 5 It is a schematic diagram of the structure inside the second placement cavity in the present invention.

[0021] Figure 6 for Figure 5 A magnified schematic diagram of the A1 region in the middle.

[0022] Figure 7 for Figure 3 A magnified schematic diagram of the A2 region in the middle.

[0023] Figure 8 It is a schematic diagram of the structure of the cleaning tube in the present invention.

[0024] Fig. 9 It is a schematic diagram of the structure of the interior of the cleaning tube in the present invention.

[0025] In the accompanying drawings: 1. Shell; 2. Installation cavity; 3. First placement cavity; 4. Second placement cavity; 5. Winding cone; 6. First roller; 7. Limiting ring; 8. Connecting pipe; 9. Second roller; 10. First rotating power part; 11. First clamping roller; 12. Cross bar; 13. Sliding block; 14. Support roller; 15. Telescopic part; 16. Electromagnet; 17. Third roller; 18. Second rotating power part; 19. Protective box; 20. Second clamping roller; 21. Mesh plate; 22. Heating tube; 23. Fan; 24. Cleaning tube; 25. Drive module; 26. Cleaning brush; 27. Blowing tube; 28. Air collecting tube; 29. ​​Fan; 30. Shielding cover; 31. Closing cone; 32. Charging device body; 33. Elastic membrane; 34. Cable winding assembly. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0028] like Figure 1-Figure 4 As shown, a waterproof automobile charging pile provided by the present invention comprises a shell 1, wherein an installation cavity 2, a first placement cavity 3, and a second placement cavity 4 are arranged in the shell 1, a charging device body 32 is arranged in the installation cavity 2, a protection box 19 connected to the second placement cavity 4 is fixedly installed on one side of the shell 1, a cleaning pipe 24 is rotatably installed on the bottom surface of the protection box 19, the cleaning pipe 24 is connected to the protection box 19, and a driving module 25 for driving the cleaning pipe 24 to rotate is arranged on the shell 1, and a cleaning brush 26 is arranged in the cleaning pipe 24; An air collecting pipe 28 is fixedly installed on the bottom of the protective box 19. The air collecting pipe 28 is coaxially arranged with the cleaning pipe 24 and is rotatably connected to the cleaning pipe 24. A blowing pipe 27 is arranged on the cleaning pipe 24, and the blowing pipe 27 is connected to the air collecting pipe 28. The cleaning brushes 26 are arranged at intervals in layers and the blowing pipes 27 are spaced apart from the cleaning brushes 26. The blowing pipes 27 are arranged at an angle with the horizontal plane and the end of the blowing pipes 27 away from the cleaning pipe 24 is the lower end. A fan 29 is fixedly installed on the side of the shell 1, and the fan 29 is connected to the air collecting pipe 28. The charging device body 32 is connected to a charging gun through a cable, and the cable passes through the first placement cavity 3, the second placement cavity 4, the protective box 19 and the cleaning pipe 24 in sequence. The charging gun is hung on the side of the shell 1 and a shielding cover 30 is fixedly installed on the side of the shell 1. A cable winding assembly 34 is arranged in the shell 1 and a closing cone 31 is fixedly installed on the end of the cable close to the charging gun.

[0029] In actual application of this embodiment, the housing 1 is fixedly installed at a set position. In the non-charging state, the charging gun is hung on the side of the housing 1 and is located under the shielding cover 30. At the same time, the closing cone 31 contacts and closes the lower end of the cleaning tube 24. At this time, the interior of the housing 1 is isolated from the outside world, preventing rainwater and humid air from entering the housing 1, thereby improving the waterproof performance of the housing 1. When charging, the user will take the charging gun and control the cable reel assembly 34 to release the cable outward through the switch on the charging gun, and then charging can be carried out. If it rains during charging, the cable outside the shell 1 will be wetted by the rain. After charging is completed, the cable is reeled in by the cable reel assembly 34, and the wet cable is located in the second placement chamber 4 after being reeled in. When the cable is collected, the cleaning tube 24 is driven to rotate by the driving module 25, and the fan 29 delivers air to the air collecting tube 28. The cable moves vertically upward in the cleaning tube 24. When the cleaning tube 24 rotates, it drives the cleaning brush 26 to clean the surface of the cable, thereby removing impurities attached to the cable surface due to rainwater. At the same time, the air in the air collecting tube 28 will be blown out through the blowing tube 27. Because the blowing pipe 27 is set at an angle with the horizontal plane and the end of the blowing pipe 27 away from the cleaning pipe 24 is the lower end, the air blown out of the blowing pipe 27 will blow onto the surface of the cable and the cleaning brush 26 on the lower side, and a large amount of rainwater on the surface of the cable will be blown downward by the high-speed flowing air, and the rainwater will flow downward along the cable and detach, thereby reducing the rainwater content attached to the cable. At the same time, the fast-flowing air can blow down the impurities attached to the cleaning brush 26, thereby realizing the simultaneous cleaning of rainwater and impurities on the cable and the cleaning brush 26, further improving the cleaning effect of the cable, minimizing the amount of rainwater carried by the cable into the second placement cavity 4, and improving the waterproof performance of the shell 1. After the rainwater on the cable is cleaned, the closing cone 31 can be used to close the lower end of the cleaning pipe 24.

[0030] In an example of the present invention, the driving module 25 can be a motor that drives the cleaning tube 24 to rotate through a belt, or a motor that drives the cleaning tube 24 to rotate through other means such as a gear set.

[0031] like Figure 2-Figure 9 As shown, a waterproof car charging pile provided by the present invention, the cable winding assembly 34 includes a winding cone 5, the winding cone 5 is fixedly installed in the first placement cavity 3, a first roller 6 is rotatably installed in the first placement cavity 3, the first roller 6 is located above the winding cone 5 and is used to change the direction of the cable, and a limiting ring 7 is fixedly installed in the first placement cavity 3 and is located between the winding cone 5 and the first roller 6, and the cable passes through the limiting ring 7.

[0032] Specifically, an elastic membrane 33 is fixedly installed on the side wall between the first placement cavity 3 and the second placement cavity 4, and the elastic membrane 33 covers the hole through which the cable passes. An elastic ring is provided at the end of the elastic membrane 33 and the elastic ring contacts the surface of the cable.

[0033] Specifically, the cable winding assembly 34 also includes a second roller 9 and a third roller 17. The second roller 9 is rotatably installed in the second placement cavity 4 and is driven by the first rotating power member 10. A first clamping roller 11 is rotatably installed in the second placement cavity 4 for pressing the cable against the second roller 9. The third roller 17 is rotatably installed in the protective box 19 and is driven by the second rotating power member 18. A second clamping roller 20 for pressing the cable against the third roller 17 is rotatably installed in the protective box 19.

[0034] Specifically, two groups of cross bars 12 are fixedly installed in the second placement cavity 4, the cross bars 12 are permanent magnets, and pairs of sliders 13 are arranged on the cross bars 12, the sliders 13 are made of iron, and the corresponding two groups of sliders 13 are installed with supporting rollers 14 for rotating together, and a telescopic part 15 parallel to the cross bars 12 is fixedly installed in the second placement cavity 4, and the telescopic part 15 drives the electromagnet 16 to move. After the electromagnet 16 is energized, it adsorbs the slider 13 and the adsorption force of the electromagnet 16 on the slider 13 is greater than the adsorption force of the cross bar 12 on the slider 13.

[0035] Specifically, a mesh plate 21 is fixedly installed at the bottom of the second placement cavity 4, multiple sets of fans 23 are fixedly installed at the bottom surface of the second placement cavity 4, and multiple sets of heating tubes 22 located between the mesh plate 21 and the fans 23 are fixedly installed at the bottom of the second placement cavity 4.

[0036] Specifically, a connecting pipe 8 connecting the installation cavity 2 and the second placement cavity 4 is fixedly installed in the housing 1 , and a solenoid valve is fixedly installed on the connecting pipe 8 .

[0037] In actual application of this embodiment, a cable release and reeling switch is provided on the charging gun. When charging, the user picks up the charging gun and moves it, and at the same time, the first rotating power member 10 and the second rotating power member 18 rotate synchronously to release the cable. When the cable is wet on a rainy day during charging, the first rotating power member 10 remains stationary after charging is completed, and the second rotating power member 18 rotates in the opposite direction to move the cable into the second placement cavity 4. When the cable is reeled, impurities and rainwater on the surface of the cable are cleaned in the cleaning tube 24. Since the cable is in a fixed position at the second roller 9, the cable enters the second placement cavity 4 and moves downward and bends under the action of gravity. When the cable enters the second placement cavity 4, the electromagnet 16 is energized to absorb the slider 13 close to the second roller 9, and then the telescopic member 15 contracts to drive the slider 13 to move toward the second roller 9. At this time, the support position of the support roller 14 for the cable moves toward the second roller 9, thereby reducing the width occupied by the cable after bending. When the first group of sliders 13 reaches the set position, the bottom of the cable bending just reaches the top of the mesh plate 21. The subsequent cables continue to enter the second placement chamber 4 and continue to bend and be stored at the rear side of the group of support rollers 14. Repeating the above steps can make all the wet cables stored in the second placement chamber 4. When the cables are not completely dry, the closing cone 31 does not contact the cleaning tube 24. At this time, the air at the bottom of the second placement chamber 4 is heated by the heating tube 22, and the air is blown upward by the fan 23 to accelerate the movement. After the hot air passes through the mesh plate 21, the wet cables above are dried. Since the wet cables are supported and separated by the support roller 14, the cables are in a suspended state, so that the hot air can fully contact with the cable surface for drying, avoiding incomplete drying caused by cable accumulation and squeezing, and reducing the space for the distribution of wet cables through the second placement chamber 4, further accelerating the drying of the cables. Due to the presence of the elastic membrane 33, the first placement chamber 3 and the second placement chamber 4 are not connected at this time, so that the humid air in the second placement chamber 4 will not enter the first placement chamber 3, thereby ensuring that the air and cables in the first placement chamber 3 will not be damp, ensuring that the first placement chamber 3 is in a dry state, and the humid air will flow along the protective box 19 and the cleaning tube 2 4 is discharged outward, and the first placement chamber 3 and the second placement chamber 4 are separated by the elastic membrane 33. Dry and wet cables are placed in the first placement chamber 3 and the second placement chamber 4 respectively, so that the wet cables can be recovered in time after charging is completed and the dry cables in the shell 1 are avoided from being affected, thereby further improving the waterproof performance of the charging device. When the cable is dried, the third roller 17 rotates again to make the closing cone 31 contact the cleaning tube 24 to close the cleaning tube 24, so that the outside air cannot enter the second placement chamber 4 through the cleaning tube 24, thereby realizing the closure of the shell 1, avoiding the outside humid air from entering the shell 1, and improving the waterproof performance of the shell 1. After the cleaning tube 24 is closed, the first roller 6 rotates to drive the cable in the second placement chamber 4 to enter the first placement chamber 3, and the cable is guided by the first roller 6 and the limit ring 7, and then the cable is wound on the winding cone 5; When in normal charging state, the solenoid valve on the connecting pipe 8 is opened, and the fan 23 is in the on state at this time, so that the air flows upward to take away the heat in the installation cavity 2, ensuring that the charging device body 32 is used at normal temperature. After charging is completed, the solenoid valve is closed to ensure that the installation cavity 2 is in a dry state.

[0038] In one embodiment of the present invention, the first rotating power member 10 and the second rotating power member 18 are respectively the first motor and the second motor, and of course they can also be other components that can output rotational power such as hydraulic motors. The first motor and the second motor respectively drive the second roller 9 and the third roller 17 to rotate, thereby realizing the winding and releasing of the cable. The telescopic member 15 is an electric telescopic rod, and of course it can also be other components that can actively change the length such as hydraulic cylinders. The electric telescopic rod drives the electromagnet 16 to move, thereby adjusting the position of the support roller 14.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A waterproof car charging pile, comprising a housing (1), wherein the housing (1) is provided with an installation cavity (2), a first placement cavity (3) and a second placement cavity (4), characterized in that: A charging device body (32) is arranged in the installation cavity (2); a protection box (19) connected to the second placement cavity (4) is fixedly installed on one side of the shell (1); a cleaning tube (24) is rotatably installed on the bottom surface of the protection box (19); the cleaning tube (24) is connected to the protection box (19) and a driving module (25) for driving the cleaning tube (24) to rotate is arranged on the shell (1); and a cleaning brush (26) is arranged in the cleaning tube (24); An air collecting pipe (28) is fixedly mounted on the bottom surface of the protection box (19), the air collecting pipe (28) and the cleaning pipe (24) are coaxially arranged and rotatably connected to each other, a blowing pipe (27) is arranged on the cleaning pipe (24), the blowing pipe (27) is in communication with the air collecting pipe (28), a fan (29) is fixedly mounted on the side of the shell (1), the fan (29) is connected to the air collecting pipe (28), the charging device body (32) is connected to a charging gun via a cable, the cable passes through the first placement cavity (3), the second placement cavity (4), the protection box (19) and the cleaning pipe (24) in sequence, the charging gun is hung on the side of the shell (1) and a shielding cover (30) is fixedly mounted on the side of the shell (1), a cable winding assembly (34) is arranged in the shell (1) and a closing cone (31) is fixedly mounted on the end of the cable close to the charging gun; Two groups of cross bars (12) are fixedly installed in the second placement cavity (4), the cross bars (12) being permanent magnets, and pairs of sliders (13) are arranged on the cross bars (12), the sliders (13) being made of iron, and the corresponding two groups of sliders (13) are rotatably installed with supporting rollers (14), and a telescopic member (15) parallel to the cross bars (12) is fixedly installed in the second placement cavity (4), the telescopic member (15) drives the electromagnet (16) to move, and the electromagnet (16) adsorbs the slider (13) after being energized, and the adsorption force of the electromagnet (16) on the slider (13) is greater than the adsorption force of the cross bars (12) on the slider (13).

2. A waterproof car charging pile according to claim 1, characterized in that: The cleaning brushes (26) are arranged in layers and at intervals, and the blowing pipe (27) and the cleaning brushes (26) are arranged at intervals, the blowing pipe (27) is arranged at an angle with the horizontal plane, and the end of the blowing pipe (27) away from the cleaning pipe (24) is the lower end.

3. A waterproof car charging pile according to claim 1, characterized in that: The cable winding assembly (34) comprises a winding cone (5), the winding cone (5) being fixedly mounted in a first placement cavity (3), a first roller (6) being rotatably mounted in the first placement cavity (3), the first roller (6) being located above the winding cone (5) and being used to change the direction of the cable, a limiting ring (7) being fixedly mounted in the first placement cavity (3) and being located between the winding cone (5) and the first roller (6), and the cable passing through the limiting ring (7).

4. A waterproof car charging pile according to claim 3, characterized in that: An elastic membrane (33) is fixedly mounted on the side wall between the first placement cavity (3) and the second placement cavity (4), the elastic membrane (33) covers the hole through which the cable passes, and an elastic ring is provided at the end of the elastic membrane (33) and the elastic ring contacts the surface of the cable.

5. A waterproof car charging pile according to claim 3, characterized in that: The cable winding assembly (34) further comprises a second roller (9) and a third roller (17); the second roller (9) is rotatably mounted in the second placement cavity (4) and driven by a first rotating power member (10); a first pressing roller (11) is rotatably mounted in the second placement cavity (4) for pressing the cable onto the second roller (9); the third roller (17) is rotatably mounted in a protective box (19) and driven by a second rotating power member (18); a second pressing roller (20) is rotatably mounted in the protective box (19) for pressing the cable onto the third roller (17).

6. A waterproof car charging pile according to claim 1, characterized in that: A mesh plate (21) is fixedly mounted on the bottom of the second placement cavity (4), a plurality of sets of fans (23) are fixedly mounted on the bottom surface of the second placement cavity (4), and a plurality of sets of heating tubes (22) are fixedly mounted on the bottom of the second placement cavity (4) and are located between the mesh plate (21) and the fans (23).

7. A waterproof car charging pile according to claim 6, characterized in that: A connecting pipe (8) connecting the installation cavity (2) and the second placement cavity (4) is fixedly installed in the housing (1), and a solenoid valve is fixedly installed on the connecting pipe (8).

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