Pneumatic electromagnetic valve

Abstract

The utility model relates to the field of valve body structures, and provides a pneumatic electromagnetic valve which comprises a frame body, an air nozzle set, a fixed iron core, a movable inner core, a coil, a first silencing part and a second silencing part. The tuyere group is mounted on the outer wall of the frame body, and the fixed iron core is connected with the interior of the frame body; the tuyere group is provided with three tuyeres which respectively form a first tuyere, a second tuyere and a third tuyere; the coil sleeves the outer wall of the fixed iron core, and the coil and the fixed iron core are in a power-on or power-off state; a first channel and a second channel are formed in the frame body, the first channel is communicated with the first air nozzle, and the second channel is communicated with the second air nozzle; a third channel communicated with the third tuyere is formed in the fixed iron core; the first silencing piece is arranged in the second tuyere, and the second silencing piece is arranged in the third tuyere. The device has the effects of reducing the number of the required electromagnetic valves and reducing noise generated during inflation and exhaust at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of valve body structures, and in particular to a pneumatic solenoid valve. Background Art

[0002] Cars are a commonly used means of transportation. In order to avoid lumbar muscle strain or lumbar spine disease caused by long-term driving or sitting in a car, people usually choose products such as car lumbar supports to protect their waists.

[0003] A general lumbar support uses pneumatic massage. A solenoid valve is required to inflate or deflate the air bag or airbag. The solenoid valve needs to be switched for inflation or exhaust. Generally, two sets of solenoid valves are used for switching. One set of solenoid valves provides exhaust, and the other set of solenoid valves provides inflation. The two sets of solenoid valves will take up more installation area, making it impossible for the air bag or airbag to provide multiple air bags or airbags to provide multi-directional massage when inflating or deflation, thereby reducing the massage effect. At the same time, multiple sets of solenoid valves will also cause more airflow during inflation and exhaust, which will generate noise and affect the user experience. Summary of the Invention

[0004] In order to improve the above-mentioned problems, the present application provides a pneumatic solenoid valve.

[0005] The pneumatic solenoid valve provided in this application adopts the following technical solution:

[0006] 18. The pneumatic solenoid valve according to claim 15, wherein the first and second nozzles are connected to each other via a cam, and the second and second nozzles are connected to each other via a cam.

[0007] By adopting the above technical solution, three groups of air nozzles are used to provide inflation and deflation, and the electromagnetic adsorption effect is used to switch the inflation and deflation states, so that the number of solenoid valves required for a single air bag is reduced. At the same time, the first silencer and the second silencer are arranged at the second air nozzle and the third air nozzle, so that the noise generated by the airflow during the inflation and deflation process is reduced, thereby improving the comfort experience of use.

[0008] Optionally, both ends of the movable inner core are provided with mounting grooves, and pads are provided in the mounting grooves.

[0009] By adopting the above technical solution, the gasket has sealing properties. When the movable inner core moves along the inside of the frame, it drives the gasket to move, closing the connection between the first channel and the second channel, or closing the connection between the second channel and the third channel. The gasket is used for closing, which can increase air tightness and reduce air leakage or inability to fully close.

[0010] Optionally, the pad is in the shape of a truncated cone and is provided with a semicircular protrusion.

[0011] By adopting the above technical solution, the inclination direction of the truncated cone-shaped semicircular protrusion is toward the connection point between the first channel and the second channel or the connection point between the third channel and the second channel, so that when the gasket contacts the two connection points, it can provide a more fitting seal.

[0012] Optionally, a chamfer for limiting positioning is provided at the notch of the mounting slot.

[0013] By adopting the above technical solution, the chamfer is combined with the semicircular protrusion to prevent the pad from separating from the mounting groove, which is used to provide a limit during the reciprocating inflation and exhaust process to prevent the pad from separating from the mounting groove.

[0014] Optionally, a connecting cavity is provided in the third channel, a reset portion is provided in the connecting cavity, and the reset portion is connected to the cushion block.

[0015] By adopting the above technical solution, the adaptability of the installation can be improved by setting the reset part, and the function of switching the air outlet can be achieved without vertically installing the solenoid valve.

[0016] Optionally, a sealing ring is further provided at the nozzle assembly.

[0017] By adopting the above technical solution, the sealing ring can provide air tightness during gas transmission, thereby reducing gas leakage during gas transmission.

[0018] Optionally, an outer cover is further provided at the nozzle assembly, and the outer cover fixes the sealing ring.

[0019] By adopting the above technical solution, the outer cover is used to tighten the sealing ring, so that the sealing performance of the sealing ring is increased, and the airtightness is further improved.

[0020] Optionally, an outer frame is provided outside the frame, and the outer frame fixes the coil.

[0021] By adopting the above technical solution, one end of the outer frame can be inserted into the surface of the frame, and the other end can be inserted into the surface of the coil, thereby making the connection between the coil and the frame more stable.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. Three sets of air nozzles are used to provide inflation and deflation, and the electromagnetic adsorption effect is used to switch the inflation and deflation states, thereby reducing the number of solenoid valves required for a single air bag. At the same time, the first and second silencers are provided at the second and third air nozzles to reduce the noise generated by the airflow during the inflation and deflation process, thereby improving the user comfort experience.

[0024] 2. The gasket has sealing properties. When the movable inner core moves along the inside of the frame, it drives the gasket to move. When closing the connection between the first channel and the second channel, or closing the connection between the second channel and the third channel, the gasket is used to close it, which can increase air tightness and reduce air leakage or inability to fully close.

[0025] 3. The inclination direction of the frustum-shaped semicircular protrusions is toward the connection point between the first channel and the second channel or the connection point between the third channel and the second channel, so that when the gasket contacts the two connection points, it can provide a better fit and seal;

[0026] 4. The chamfer is combined with the semicircular protrusion to prevent the pad from separating from the mounting groove. It is used to provide a limit during the reciprocating inflation and exhaust process to prevent the pad from separating from the mounting groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the explosion structure of the solenoid valve in one embodiment of the present application;

[0028] Figure 2 is a schematic diagram of the cross-sectional structure of a solenoid valve in some embodiments of the present application;

[0029] The marks in the accompanying drawings are: 1. Frame, 11. First channel, 12. Second channel, 13. Snap-in groove, 2. Nozzle group, 21. First nozzle, 22. Second nozzle, 23. Third nozzle, 24. Sealing ring, 25. Outer cover, 3. Fixed iron core, 31. Third channel, 32. Connecting cavity, 33. Reset part, 4. Movable inner core, 41. Mounting groove, 42. Pad, 5. Coil, 6. First silencer, 7. Second silencer, 8. Outer frame. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the present application through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present application from the information disclosed in this application. The present application can also be implemented or applied through different specific embodiments. The details in this application can also be modified or changed according to different viewpoints and application systems without departing from the spirit of this application. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless they conflict.

[0031] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in many different forms and is not limited to the embodiments described herein.

[0032] In the description of this application, reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this application, as well as features of different embodiments or examples, unless otherwise contradictory.

[0033] Furthermore, the terms "first" and "second" are used solely to indicate a target and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the context of this application, "plurality" means two or more, unless otherwise specifically defined.

[0034] Throughout this specification, when a device is said to be "connected" to another device, this includes not only "direct connection" but also "indirect connection" with other elements interposed therebetween. Furthermore, when a device is said to "include" a certain component, unless otherwise stated, this does not exclude the inclusion of other components but rather implies that the device may include other components.

[0035] The following is combined with Figure 1 -Attached Figure 2 , further details of this application are given.

[0036] The embodiment of the present application discloses a pneumatic solenoid valve.

[0037] A pneumatic solenoid valve is mainly used in automobile massage seats to provide pneumatic massage. The solenoid valve is used to inflate or exhaust the air bag to achieve a massage effect.

[0038] refer to Figure 1 and Figure 2 As shown, it includes a frame 1, a nozzle group 2, a fixed iron core 3, a movable inner core 4, a coil 5, a first silencer 6 and a second silencer 7; the nozzle group 2 is installed on the outer wall of the frame 1, and the fixed iron core 3 is installed on the inner wall of the frame 1. The frame 1 is cylindrical and an installation cavity is formed inside. The fixed iron core 3 is fixedly installed in the frame 1 and closes one of the outlets of the installation cavity of the frame 1.

[0039] The solenoid valve of the present application adopts a three-way solenoid valve structure, so the nozzle group 2 is provided with three nozzles, namely the first nozzle 21, the second nozzle 22 and the third nozzle 23, which correspond to the first nozzle 21 for air inlet, the second nozzle 22 and the third nozzle 23 for air outlet, respectively. The external massage air bag or airbag is connected to the second nozzle 22, and the third nozzle 23 is used to discharge the gas in the massage air bag or airbag.

[0040] The coil 5 is sleeved on the outer wall of the fixed iron core 3 and is energized. After being energized, the coil 5 cooperates with the fixed iron core 3 to form an electromagnetic attraction, which can produce a magnetic adsorption effect.

[0041] refer to Figure 2 As shown, a first channel 11 and a second channel 12 are opened in the frame 1, the first channel 11 is connected to the first air nozzle 21, and the second channel 12 is connected to the second air nozzle 22. The first air nozzle 21 conveys the airflow to the first channel 11, and then the first channel 11 conveys the airflow to the second channel 12 or the third channel 31. The second channel 12 is connected to the second air nozzle 22, so that when the second airflow enters the second channel 12, the massage air bag or airbag can be inflated through the second air nozzle 22.

[0042] The movable inner core 4 is slidingly connected to the frame 1 and magnetically connected to the fixed iron core 3. The movable inner core 4 can be made of iron alloy or magnetic material with electromagnetic adsorption. When the fixed iron core 3 and the coil 5 are energized, the movable inner core 4 is affected by the magnetic adsorption force and can move along the installation cavity in the frame 1 toward the fixed iron core 3.

[0043] The channel opening of the second channel 12 fits with the end of the movable inner core 4, so that when the movable inner core 4 slides along the installation cavity in the frame 1, the movable inner core 4 opens the second channel 12 and the first channel 11. At the same time, after the movable inner core 4 contacts the fixed iron core 3, the third air nozzle 23 is closed, and the first air nozzle 21 can then transport the airflow through the first channel 11 to the second channel 12.

[0044] refer to Figure 2As shown, a third channel 31 connected to the third air nozzle 23 is opened in the fixed iron core 3, and the third channel 31 is connected to the second channel 12. After the movable inner core 4 contacts the fixed iron core 3, the connection point between the third channel 31 and the first channel 11 is closed, so that the first channel 11 is connected to the second channel 12.

[0045] A first silencer 6 is provided in the second air nozzle 22, and a second silencer 7 is provided in the third air nozzle 23. Both the first silencer 6 and the second silencer 7 can be made of silencer cotton, which has the function of breathability and silence. When the air flow passes through the first silencer 6 and the second silencer 7, the air flow penetrates the first silencer 6 and the second silencer 7, and at the same time reduces the noise generated by the flow and the noise generated by the excessively fast air flow when flowing in the solenoid valve. Specifically, during the massage process, the noise generated can be reduced from 50 decibels to 35 decibels.

[0046] Specifically, when the coil 5 is energized, it cooperates with the fixed iron core 3 to form an adsorbent magnetic force, causing the movable inner core 4 to slide along the frame 1 under the influence of the magnetic force until it contacts the fixed iron core 3, closing the connection point of the third channel 31 or the second channel 12. The first air nozzle 21 is connected to the air pump, so that the air flow flows from the first channel 11. Since the third channel 31 is blocked by the fixed inner core, the air flow flows from the first channel 11 to the second channel 12. The second air nozzle 22 outside the second channel 12 is connected to a massage airbag, which is inflated to achieve massage. Subsequently, the airbag needs to be frequently inflated and deflated to ensure massage efficiency. At this time, the power of the coil 5 is disconnected, and the movable inner core 4 loses its magnetic force. Under the action of gravity, it can move along the frame 1 and separate from the fixed iron core 3;

[0047] At the same time, the movable inner core 4 moves to the connection point of the first channel 11 and the second channel 12, so that the first channel 11 and the second channel 12 are closed, and the second channel 12 and the third channel 31 are opened. The gas inside the massage airbag can enter the third channel 31 from the second channel 12 and be discharged from the third air nozzle 23, completing the air circulation required for massage. During the air circulation process, the third air nozzle 23 and the second air nozzle 22 are respectively provided with a first silencer 6 and a second silencer 7, so that the noise generated during the air circulation is reduced, thereby improving the comfortable experience during massage.

[0048] For further reference, Figure 2 As shown, both ends of the movable inner core 4 are provided with mounting grooves 41, and pads 42 are provided in the mounting grooves 41. The pads 42 can be rubber pads 42 or plastic pads 42, which have sealing properties. When the movable inner core 4 moves along the inside of the frame 1, it drives the pads 42 to move, closing the connection between the first channel 11 and the second channel 12, or closing the connection between the second channel 12 and the third channel 31. The pads 42 are used for closing, which can increase air tightness and reduce air leakage or the situation where it cannot be fully closed.

[0049] Further, refer to Figure 1 As shown, the gasket 42 is in the shape of a truncated cone and is provided with a semicircular protrusion. The inclination direction of the semicircular protrusion of the truncated cone is toward the connection point between the first channel 11 and the second channel 12 or the connection point between the third channel 31 and the second channel 12, so that when the gasket 42 contacts the two connection points, it can provide a more fitting seal.

[0050] Among them, the groove of the installation groove 41 is provided with a chamfer for limiting. The chamfer is combined with the semicircular protrusion to prevent the pad 42 from separating from the installation groove 41. It is used to provide limiting during the reciprocating inflation and exhaust process to prevent the pad 42 from separating from the installation groove 41.

[0051] Further, refer to Figure 1 or Figure 2 As shown, an outer frame 8 is provided outside the frame 1. The outer frame 8 is in the shape of two sets of U-shaped frames, and the inner diameter matches the outer diameter of the coil 5, so that one end of the outer frame 8 can be inserted into the surface of the frame 1, and the other end can be inserted into the surface of the coil 5, thereby making the connection between the coil 5 and the frame 1 more stable.

[0052] A PIN card pin may also be provided on the frame 1 to disconnect the power supply to the fixed core 3 and the coil 5, thereby ensuring that the fixed core 3 and the coil 5 are not energized when not in use.

[0053] In some embodiments, reference Figure 2 As shown, a connecting cavity 32 is provided in the third channel 31, and a reset portion 33 is provided in the connecting cavity 32. The reset portion 33 is connected to the pad 42. When the coil 5 is not energized, the fixed iron core 3 loses its adsorption force. Therefore, if the solenoid valve is not installed vertically, the movable inner core 4 cannot be affected by gravity and move along the frame 1 to close the connection point between the second channel 12 and the first channel 11. Therefore, a connecting cavity 32 is provided in the third channel 31.

[0054] A reset portion 33 is provided in the connecting cavity 32. The reset portion 33 may adopt a reset spring. The reset spring provides an elastic force to push the movable inner core 4 to move, but the magnitude of the elastic force is smaller than the magnetic force between the movable inner core 4 and the fixed iron core 3. Therefore, when the movable inner core 4 is affected by the magnetic force, it can overcome the influence of the elastic force and make the pad 42 of the movable inner core 4 fit with the fixed iron core 3. When the magnetic force is lost, the reset portion 33 generates an elastic force to push the pad 42 and the movable inner core 4 toward the connection point between the first channel 11 and the second channel 12, so that the pad 42 at the other end of the movable inner core 4 presses against the connection point between the first channel 11 and the second channel 12.

[0055] The reset portion 33 is provided to improve the adaptability of the installation, and the air outlet can be switched without vertically installing the solenoid valve.

[0056] In some embodiments, reference Figure 1As shown, a sealing ring 24 is further provided at the nozzle group 2. The sealing ring 24 can provide air tightness during gas transmission, thereby reducing gas leakage during gas transmission. The nozzle group 2 is provided with a first nozzle 21, a second nozzle 22 and a third nozzle 23. Therefore, at least one sealing ring 24 can be set, and when one is set, it needs to be set at the first nozzle 21. The second nozzle 22 and the third nozzle 23 are mainly used for exhaust, so the sealing ring 24 may not be set, but it is preferred to set a sealing ring 24.

[0057] For further reference, Figure 1 As shown, an outer cover 25 is further provided at the nozzle group 2, and the outer cover 25 fixes the sealing ring 24 to the nozzle. The outer cover 25 is used to tighten the sealing ring 24, so that the sealing performance of the sealing ring 24 is increased. The specific connection method can be a screw connection. An external thread is provided at the nozzle where the sealing ring 24 is required to be provided, and an internal thread is provided on the outer cover 25. The sealing ring 24 is located inside the outer cover 25, so that when the outer cover 25 and the nozzle are screwed together, the sealing ring 24 can be firmly installed at the nozzle.

[0058] In some embodiments, reference Figure 2 As shown, a snap-in groove 13 is provided in the second channel 12 and the third channel 31, and the first silencer 6 and the second silencer 7 are provided with a snap-in protrusion, which is located in the snap-in groove 13, so that the first silencer 6 and the second silencer 7 cannot be separated from the snap-in groove 13, so that during the reciprocating inflation and exhaust process, the first silencer 6 and the second silencer 7 are constantly affected by the two air pressures and can provide a stable silencer effect.

[0059] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A pneumatic solenoid valve, characterized in that: The invention comprises a frame (1), a nozzle group (2), a fixed iron core (3), a movable inner core (4), a coil (5), a first silencer (6) and a second silencer (7); the nozzle group (2) is mounted on the outer wall of the frame (1), and the fixed iron core (3) is connected to the inside of the frame (1); the nozzle group (2) is provided with three nozzles, forming a first nozzle (21), a second nozzle (22) and a third nozzle (23); the coil (5) is sleeved on the outer wall of the fixed iron core (3), and is in an energized or de-energized state with the fixed iron core (3); a first channel (11) and a second channel (12) are opened in the frame (1), the first channel (11) is connected to the first nozzle (21), and the second channel (12) is connected to the The second air nozzle (22) is connected; the movable inner core (4) is slidably connected to the frame (1) and is magnetically connected to the fixed iron core (3), and the channel opening of the second channel (12) is matched with the end of the movable inner core (4); a third channel (31) connected to the third air nozzle (23) is opened in the fixed iron core (3), and the third channel (31) is connected to the second channel (12); the coil (5) and the fixed iron core (3) are energized or de-energized, so that the movable inner core (4) slides along the frame (1) to close the third channel (31) or the second channel (12); the second air nozzle (22) is provided with the first silencer (6), and the third air nozzle (23) is provided with the second silencer (7).

2. A pneumatic solenoid valve according to claim 1, characterized in that: Both ends of the movable inner core (4) are provided with mounting grooves (41), and cushion blocks (42) are provided in the mounting grooves (41).

3. A pneumatic solenoid valve according to claim 2, characterized in that: The pad (42) is in the shape of a truncated cone and is provided with a semicircular protrusion.

4. A pneumatic solenoid valve according to claim 3, characterized in that: The notch of the installation slot (41) is provided with a chamfer for limiting.

5. The pneumatic solenoid valve according to claim 2, characterized in that: A connecting cavity (32) is provided in the third channel (31), a reset portion (33) is provided in the connecting cavity (32), and the reset portion (33) is connected to the cushion block (42).

6. The pneumatic solenoid valve according to claim 1, characterized in that: A sealing ring (24) is also provided at the nozzle assembly (2).

7. The pneumatic solenoid valve according to claim 6, characterized in that: The nozzle assembly (2) is further provided with an outer cover (25), and the outer cover (25) fixes the sealing ring (24).

8. The pneumatic solenoid valve according to claim 1, characterized in that: An outer frame (8) is provided outside the frame (1), and the outer frame (8) fixes the coil (5).

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