Small electromagnetic valve with low air resistance and low noise

Abstract

The utility model provides a small electromagnetic valve with low air resistance and low noise, which comprises a valve body, a movable part, a coil assembly and iron, the valve body is provided with two movable cavities, the movable part is arranged in the movable cavities, the coil assembly is arranged on the periphery of the movable cavities, and the iron is arranged on one side of one of the movable cavities. When the coil is not electrified, the movable piece moves towards one side through attraction force generated by the permanent magnet and the iron block; when the coil is electrified, the coil generates a magnetic field, so that the movable piece overcomes the attraction force to move towards the other side. The combination of the permanent magnet and the iron can reduce noise generated in the moving process of the movable part, meanwhile, the composition of the moving assembly is simplified, and the overall size of the electromagnetic valve is reduced. Damping blocks are arranged at the two ends of the movable part, noise generated in the moving process of the movable part is reduced, and sealing is achieved. The connection position of the airflow channel and the spool adopts an inclined plane design, so that vortex can be eliminated, air resistance can be reduced, and inflation and deflation speed can be increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to solenoid valve technical field especially relates to a low air resistance low noise small solenoid valve. BACKGROUND

[0002] The pneumatic product in the automobile seat comfort system controls the gas circuit through the solenoid valve, and the solenoid valve controls the inflation and deflation of each gas circuit to realize the action of the gas circuit module. The solenoid valve controls the movement of the movable core through the energized coil, and then opens and closes the air inlet to control the inflation and deflation. However, the existing solenoid valve has a large overall structure, and the movable core will collide with the inner wall of the solenoid valve to produce noise when resetting under the action of elasticity. In addition, the deflation port has a small caliber, and vortex will be generated during deflation, increasing the air resistance. SUMMARY

[0003] The utility model provides a low air resistance low noise small solenoid valve to solve the technical problem proposed in the background art.

[0004] The utility model adopts the technical scheme that:

[0005] The low air resistance low noise small solenoid valve comprises:

[0006] A valve body has a first movable cavity and a second movable cavity, two ends of the first movable cavity are provided with an air inlet and an air outlet, one end of the second movable cavity close to the first movable cavity is provided with an air inlet, the air outlet of the first movable cavity is communicated with the air inlet of the second movable cavity, and the second movable cavity is provided with a deflation port close to the air inlet thereof;

[0007] A movable part is movably arranged in the first movable cavity and the second movable cavity, both ends of the movable part are provided with shock-absorbing blocks, the size of the shock-absorbing blocks is matched with the air inlets and air outlets of the first movable cavity and the air inlet of the second movable cavity, and the middle part of the movable part is provided with a permanent magnet;

[0008] A coil assembly is arranged on the periphery of the first movable cavity and the second movable cavity and fixed to the outer side of the valve body;

[0009] Iron, the valve body has a fixed part, the fixed part is located at one end of the first movable cavity away from the second movable cavity, and the iron is mounted in the fixed part.

[0010] Further, a spool is arranged between the movable part and the first movable cavity to form an airflow channel.

[0011] Further, the connection position of the spool and the airflow channel is designed as an inclined surface with an inclination angle greater than 120°.

[0012] Further, the outlet of the first movable cavity is connected with the inlet of the second movable cavity through a pipeline, a sealing shaft is installed on the pipeline of the outlet of the first movable cavity, and an iron ring is installed on the pipeline of the inlet of the second movable cavity, and the sealing shaft is connected with the iron ring in interference fit.

[0013] Further, the upper and lower ends of the second movable cavity near the inlet are provided with air release ports, and the outlet ends of the air release ports are provided with sound-absorbing sheets.

[0014] Further, the coil assembly comprises a first coil and a second coil, the first coil is arranged on the periphery of the first movable cavity, and the second coil is arranged on the periphery of the second movable cavity. Preferably, the outer side of the valve body is provided with a coil fixing groove, and the first coil and the second coil are embedded in the coil fixing groove.

[0015] Further, the material of the damping block is silica gel.

[0016] Further, a sealing ring is arranged between the plug cover at the end of the valve body and the second movable cavity.

[0017] Compared with the prior art, the utility model has the advantages or beneficial effects that:

[0018] When the coil is not electrified, the moving part moves to one side by the attraction force generated by the permanent magnet and the iron block; when the coil is electrified, the coil generates a magnetic field, so that the moving part moves to the other side by overcoming the attraction force. The combination of the permanent magnet and the iron can reduce the noise generated during the movement of the moving part, simplify the composition of the moving assembly, and reduce the overall size of the electromagnetic valve. The two ends of the moving part are provided with damping blocks, which can reduce the noise generated by the collision between the moving part and the inner wall of the movable cavity during the movement of the moving part, and the size of the damping block is matched with the inlet and outlet of the movable cavity, so that the two ends are sealed and damped. The moving part and the first movable cavity form an airflow channel, the airflow channel is communicated with the spool, and the connection position is designed as a slope, which can eliminate the vortex, reduce the air resistance, and provide the speed of air charging and discharging. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model and its features, shape and advantages will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The same reference signs indicate the same parts throughout the drawings. The drawings are not necessarily drawn to scale, and the emphasis is on showing the main idea of the utility model.

[0020] Figure 1 It is a structure schematic view of a small electromagnetic valve with low air resistance and low noise.

[0021] Figure 2 It is an enlarged schematic view of the mounting position of the sound-absorbing sheet.

[0022] Figure 3 is a schematic diagram of a charged deflated state;

[0023] Figure 4 is a schematic diagram of a charged deflated state;

[0024] Figure 5 is a schematic diagram of a charged deflated state Figure 1 ;

[0025] Figure 6 is a schematic diagram of a charged deflated state Figure 2 ;

[0026] In the figure, 1 is a valve body, 2 is a first movable cavity, 3 is a second movable cavity, 4 is a movable piece, 5 is a shock absorbing block, 6 is a permanent magnet, 701 is a first coil, 702 is a second coil, 8 is iron, 9 is a bobbin, 10 is a sealing shaft, 11 is an iron ring, 12 is a sound absorbing piece, 13 is a plug, and 14 is a sealing ring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Therefore, the detailed description of the embodiments of the present application provided in the following drawings is not intended to limit the scope of the claimed present application, but only to represent selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0028] Please refer to the drawings Figure 1 , 2 The present application provides a low air resistance and low noise small electromagnetic valve, which comprises a valve body 1, a movable piece 4, a coil assembly and iron 8. The valve body 1 has a first movable cavity 2 and a second movable cavity 3. The left side of the first movable cavity 2 is provided with an air inlet 2a, and the right side is provided with an air outlet 2b. The left side of the second movable cavity 3 is provided with an air inlet 3a, and the upper and lower ends near the air inlet 3a are provided with air outlets 3b. The outlet end of the air outlet 3b is provided with a sound absorbing piece 12 for reducing the noise generated during the operation of the valve body. The air outlet 2b of the first movable cavity 2 is in communication with the air inlet 3a of the second movable cavity 3. The movable piece 4 is movably arranged in the first movable cavity 2 and the second movable cavity 3. The two ends of the movable piece 4 are provided with shock absorbing blocks 5 made of silica gel. The size of the shock absorbing blocks 5 is adapted to the air inlet 2a, the air outlet 2b of the first movable cavity 2 and the air inlet 3a of the second movable cavity 3. The middle part of the movable piece 4 is provided with a permanent magnet 6. The coil assembly is arranged on the periphery of the first movable cavity 2 and the second movable cavity 3, and is fixed to the outside of the valve body 1. The valve body 1 has a fixed part. The fixed part is located at one end of the first movable cavity 2 away from the second movable cavity 3. The fixed part is provided with iron 8.

[0029] Further, the front end of the valve body 1 is provided with a bobbin 9, and a gas flow channel is formed between the movable element 4 and the first movable cavity 2, and the bobbin 9 is communicated with the gas flow channel. Preferably, the connection position of the bobbin 9 and the gas flow channel is designed as an inclined surface with an angle greater than 120°, which can eliminate the vortex generated when the gas flows, reduce the gas resistance, and provide the speed of charging and discharging.

[0030] Further, the outlet 2b of the first movable cavity 2 is connected with the inlet 3a of the second movable cavity 3 through a pipeline, a sealing shaft 10 is installed on the pipeline of the outlet 2b of the first movable cavity 2, and an iron ring 11 is installed on the pipeline of the inlet 3a of the second movable cavity 3, and the sealing shaft 10 is connected with the iron ring 11 in interference fit, which can avoid the possibility of gas leakage of the sealing shaft 10 during operation, and further improve the pressure maintaining effect.

[0031] Further, the coil assembly includes a first coil 701 and a second coil 702, the first coil 701 is arranged on the periphery of the first movable cavity 2, and the second coil 702 is arranged on the periphery of the second movable cavity 3. Preferably, the outer side of the valve body 1 is provided with a coil fixing groove, and the first coil 701 and the second coil 702 are embedded in the coil fixing groove. A sealing ring 14 is arranged between the end cover 13 of the valve body 1 and the second movable cavity 3, which overcomes the problem of gas leakage at the end of the valve body 1.

[0032] The use of the low-gas-resistance and low-noise small electromagnetic valve is as follows:

[0033] When the first coil is not powered, the permanent magnet is attracted to the iron block to generate a pre-pressure, so that the movable element in the first movable cavity moves to the left side to the inlet position to realize sealing. As shown in the accompanying Figure 3 When the first coil is powered, the first coil generates a magnetic field, so that the movable element in the first movable cavity moves to the right side to overcome the left side suction, thereby opening the inlet to realize charging. As shown in the accompanying Figure 4 When the magnetic field disappears after the first coil is powered off, the movable element in the first movable cavity moves to the left side due to the suction to seal the inlet, thereby achieving the pressure maintaining effect; as shown in the accompanying Figure 5 、 6 When the second coil is powered, the second coil generates a magnetic field, so that the movable element in the second movable cavity moves to the right side to overcome the left side suction, thereby opening the outlet, and the gas flows out from the outlet through the sound-absorbing piece.

[0034] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation, direct or indirect application in other related technical fields based on the content of the present application and the accompanying drawings, are also included in the patent protection range of the present application.

Claims

1. A low-barrier, low-noise, small electromagnetic valve, characterized by, The utility model relates to a valve body (1) with a first movable cavity (2) and a second movable cavity (3), the first movable cavity (2) is provided with an air inlet and an air outlet at both ends, the second movable cavity (3) is provided with an air inlet near one end of the first movable cavity (2), the air outlet of the first movable cavity (2) is communicated with the air inlet of the second movable cavity (3), and the second movable cavity (3) is provided with a gas exhaust port near the air inlet. A movable part (4) is movably arranged in the first movable cavity (2) and the second movable cavity (3), both ends of the movable part (4) are provided with shock-absorbing blocks (5), the size of the shock-absorbing blocks (5) is matched with the air inlet, the air outlet of the first movable cavity (2) and the air inlet of the second movable cavity (3), and a permanent magnet (6) is arranged in the middle of the movable part (4). A coil assembly is arranged on the periphery of the first movable cavity (2) and the second movable cavity (3) and fixed to the outside of the valve body (1). An iron (8) is arranged in a fixed part of the valve body (1), and the fixed part is located at one end of the first movable cavity (2) away from the second movable cavity (3). A spool (9) is arranged between the movable part (4) and the first movable cavity (2) to form an airflow channel, and the spool (9) is communicated with the airflow channel.

2. The low outgassing, low noise, small electromagnetic valve of claim 1, wherein, The connection position of the spool (9) and the airflow channel is designed as an inclined surface with an angle greater than 120 degrees.

3. The low outgassing, low noise, small electromagnetic valve of claim 2, wherein, The air outlet of the first movable cavity (2) is connected with the air inlet of the second movable cavity (3) through a pipeline, a sealing shaft (10) is arranged on the pipeline of the air outlet of the first movable cavity (2), an iron ring (11) is arranged on the pipeline of the air inlet of the second movable cavity (3), and the sealing shaft (10) is connected with the iron ring (11) in an interference fit.

4. The low outgassing, low noise, small electromagnetic valve of claim 1, wherein, The upper and lower ends of the second movable cavity (3) near the air inlet are provided with gas exhaust ports, and the outlet ends of the gas exhaust ports are provided with sound-absorbing sheets (12).

5. The low outgassing, low noise, small electromagnetic valve of claim 1, wherein, The coil assembly comprises a first coil (701) and a second coil (702), the first coil (701) is arranged on the periphery of the first movable cavity (2), and the second coil (702) is arranged on the periphery of the second movable cavity (3).

6. The low outgassing, low noise, small electromagnetic valve of claim 1, wherein, The shock-absorbing blocks (5) are made of silica gel or rubber.

7. The low outgassing, low noise, small electromagnetic valve of claim 1, wherein, A sealing ring (14) is arranged between the plug (13) of the valve body (1) and the second movable cavity (3).

8. The low outgassing, low noise, small electromagnetic valve of claim 1, wherein, ​

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