Air pump device capable of reducing noise and automobile seat pneumatic system

Abstract

The utility model discloses an air pump device capable of reducing noise and an automobile seat pneumatic system, and relates to the technical field of air pump equipment.The air pump device comprises an air distribution layer, an air inlet layer, an air outlet layer and an air outlet layer, the gas distribution layer comprises a first gas distribution cover and a second gas distribution cover; an air inlet area and an air outlet area are arranged on the first air distribution cover, an air inlet is formed in the position, corresponding to the air inlet area, of the second air distribution cover, an air outlet is formed in the position, corresponding to the air outlet area, of the air outlet area, the air distribution cushion is arranged between the first air distribution cover and the second air distribution cover and provided with one-way pieces, and height difference exists between the center area and the edge area of the air distribution cushion in the first direction; the air pump device further comprises a compression unit and a driving unit, and the driving end of the driving unit is in transmission connection with the compression unit. And noise generated by strenuous movement and collision of gas is reduced.

Description

TECHNICAL FIELD

[0001] The present application generally relates to the technical field of air pump equipment, and particularly relates to an air pump device with reduced noise and an automotive seat pneumatic system. BACKGROUND

[0002] With the development of science and technology in the field of vehicle transportation, people have higher and higher requirements for the comfort and safety auxiliary functions of vehicles. Most seats use pneumatic systems to realize functions such as lumbar and back adjustment, massage, and side wing support.

[0003] At present, the traditional air pump used in the pneumatic system uses a one-way sheet in the form of a planar structure. In the air pump, each piston corresponds to two one-way sheets on the planar pad. One one-way sheet is used to cooperate with the piston to intake air, and the other one-way sheet is used to cooperate with the piston to exhaust air. However, in the actual air distribution process of the air distribution pad, the beating area of the one-way sheet is relatively large. When the beating speed is constant, the larger the beating area, the greater the beating energy, and the greater the beating noise, which affects the comfort of the vehicle occupants. Therefore, the present application provides an air pump device with reduced noise and an automotive seat pneumatic system to solve the above problems. CONTENT OF THE INVENTION

[0004] In view of the above defects or deficiencies in the prior art, it is desirable to provide an air pump device with reduced noise, reduced beating area, reduced beating noise, and improved comfort.

[0005] In a first aspect, the present application provides an air pump device with reduced noise, comprising:

[0006] An air distribution layer, at least one air inlet channel and at least one air outlet channel are formed on the air distribution layer; the air distribution layer comprises a first air distribution cover and a second air distribution cover; the first air distribution cover is provided with an air inlet area and an air outlet area, the second air distribution cover is provided with an air inlet port corresponding to the position of the air inlet area and an air outlet port corresponding to the position of the air outlet area, the air inlet port and the air inlet area together constitute an air inlet channel, and the air outlet port and the air outlet area together constitute an air outlet channel;

[0007] An air distribution pad is arranged between the first air distribution cover and the second air distribution cover, and the air distribution pad is provided with a one-way sheet corresponding to the positions of the air inlet port and the air outlet port. The one-way sheet corresponding to the air inlet port cooperates with the first air distribution cover to enable one-way conduction of the air inlet channel from the air inlet area to the air inlet port. The one-way sheet corresponding to the air outlet port cooperates with the second air distribution cover to enable one-way conduction of the air outlet channel from the air outlet port to the air outlet area. The central region of at least one one-way sheet has a height difference with the edge region in a first direction, for reducing the contact area of the one-way sheet with the air distribution layer. The first direction is parallel to the thickness direction of the air distribution pad.

[0008] The air pump device further comprises a compression unit and a driving unit, and a driving end of the driving unit is in transmission connection with the compression unit.

[0009] According to the technical scheme provided in the embodiments of the present application, the center area of the one-way sheet is convex to form an avoiding space along the gas flow direction of the hole; the cross-sectional shape of the avoiding space is O-shaped, oval-shaped or U-shaped.

[0010] According to the technical scheme provided in the embodiments of the present application, the thickness of the one-way sheet is uniformly distributed, and the thickness of any two positions of the one-way sheet is within a set tolerance range.

[0011] According to the technical scheme provided in the embodiments of the present application, the part of the one-way sheet around the avoiding space forms a sealing area, and the sealing area and the area corresponding to the avoiding space are smoothly transitioned.

[0012] According to the technical scheme provided in the embodiments of the present application, the edge area of the one-way sheet is provided with a convex structure away from the surface corresponding to the air inlet or close to the air outlet.

[0013] According to the technical scheme provided in the embodiments of the present application, a limiting block is arranged at the edge area of the one-way sheet corresponding to the air inlet on the side close to the air distribution pad of the first air distribution cover, for preventing the corresponding one-way sheet from swinging from the air inlet to the side of the first air distribution cover.

[0014] According to the technical scheme provided in the embodiments of the present application, a mounting hole is arranged at the center position of the air distribution pad, and the mounting hole is used for mounting the air distribution pad on the second air distribution cover.

[0015] The air distribution pad is provided with a gas sealing structure, and the gas sealing structure comprises:

[0016] A base is connected with the mounting hole;

[0017] An airflow channel is arranged corresponding to the air outlet area of the air distribution layer, for connecting the air outlet area and an external space.

[0018] According to the technical scheme provided in the embodiments of the present application, further comprising: an air pump shell, the inside of the air pump shell is hollow to form a mounting chamber; a gas outlet is arranged on the air pump shell and is in communication with the air outlet area of the air distribution layer; the air pump shell comprises:

[0019] A base is connected with the mounting hole;

[0020] The compression unit is also installed in the mounting chamber, and the compression unit comprises a leather cup seat and a leather cup which are arranged in sequence from the side close to the base to the side away from the base, and the space between the gas distribution layer and the cover is used for mounting the gas distribution pad; the driving end of the driving unit penetrates the base and is connected with the leather cup;

[0021] The driving unit comprises:

[0022] A swing disc part is arranged between the leather cup seat and the base, and the tail end of the leather cup penetrates the swing part of the swing disc part and is connected with the swing disc part;

[0023] A driving part is provided with a driving shaft, and the end of the driving shaft is the driving end, and the torsion shaft of the end of the driving shaft is fixedly connected with the swing disc part.

[0024] In the second aspect, the application provides an automotive seat pneumatic system comprising the noise-reducing air pump device.

[0025] According to the above technical solution, the application has at least the following beneficial effects:

[0026] The application discloses a noise-reducing air pump device, which comprises a gas distribution layer, at least one air inlet channel and at least one air outlet channel are formed in the gas distribution layer; the gas distribution layer comprises a first gas distribution cover and a second gas distribution cover; the first gas distribution cover is provided with an air inlet area and an air outlet area, the second gas distribution cover is provided with an air inlet port corresponding to the position of the air inlet area, and the second gas distribution cover is provided with an air outlet port corresponding to the position of the air outlet area; the air inlet port and the air inlet area jointly form the air inlet channel, and the air outlet port and the air outlet area jointly form the air outlet channel; a gas distribution pad is arranged between the first gas distribution cover and the second gas distribution cover, and the gas distribution pad is provided with a one-way valve corresponding to the positions of the air inlet port and the air outlet port; the one-way valve corresponding to the air inlet port is matched with the first gas distribution cover, so as to realize one-way conduction of the air inlet channel from the air inlet area to the air inlet port; the one-way valve corresponding to the air outlet port is matched with the second gas distribution cover, so as to realize one-way conduction of the air outlet channel from the air outlet port to the air outlet area; the central region and the edge region of the at least one one-way valve have a height difference in the first direction, so as to reduce the contact area of the one-way valve and the gas distribution layer; the first direction is parallel to the thickness direction of the gas distribution pad; the air pump device further comprises a compression unit and a driving unit, and the driving end of the driving unit is in transmission connection with the compression unit.

[0027] The application ensures that the air inlet channel and the air outlet channel can only be unidirectionally conducted by matching the air inlet area and the air outlet area of the air distribution layer with the air inlet and the air outlet, and by setting the one-way sheet on the air distribution pad. This design can effectively avoid air backflow, so that the air flows in the air pump device according to a predetermined and stable path, improving the stability and reliability of the air pump operation. In addition, the central region and the edge region of the one-way sheet have a height difference in the direction parallel to the thickness of the air distribution pad, which helps to adjust the flow rate and pressure distribution when the air passes through. For example, when the air enters and exits the air pump device at high speed, the one-way sheet with a height difference can buffer the airflow impact and disperse the airflow pressure, avoiding the formation of violent impact and turbulence of the airflow in the local area, while reducing the contact area of the one-way sheet with the first air distribution cover and the second air distribution cover to reduce the patting sound generated between the one-way sheet and the first air distribution cover and the second air distribution cover when the one-way sheet swings, thereby reducing the noise generated by the violent movement and collision of the air from the source, and providing a relatively quiet operating environment for the user. BRIEF DESCRIPTION OF DRAWINGS

[0028] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the accompanying drawings.

[0029] Figure 1 Overall structure diagram of the noise-reduced air pump device.

[0030] Figure 2 Figure 1 Partial enlarged view in the air distribution pad.

[0031] Figure 3 Explosion diagram of the noise-reduced air pump device.

[0032] Figure 4 Overall structure diagram of the air distribution pad.

[0033] Figure 5 Front view structure diagram of the air distribution pad.

[0034] Figure 6 Bottom view structure diagram of the air distribution pad.

[0035] Figure 7 Side view structure diagram of the air distribution pad.

[0036] Figure 8 Structure diagram of the reinforcing rib.

[0037] Figure 9 Structure diagram of the one-way sheet in action.

[0038] Figure 10 Top view structure diagram of the avoidance space.

[0039] Figure 11 ​A schematic view of a skirt structure.

[0040] Figure 12 A top view of a one-way sheet applying a skirt structure.

[0041] Figure 13 A bottom view of a one-way sheet applying a skirt structure.

[0042] Figure 14 A schematic view of a convex structure.

[0043] Figure 15 A top view of a one-way sheet applying a convex structure.

[0044] Figure 16 A bottom view of a one-way sheet applying a convex structure.

[0045] Reference numerals in the figure: 1, gas outlet; 2, gas distribution pad; 3, pad body; 4, gas inlet; 5, gas outlet; 6, one-way sheet; 7, avoiding space; 8, mounting hole; 9, base; 10, sealing area; 11, limiting stopper; 12, air flow channel; 13, reinforcing rib; 14, base; 15, cover body; 16, gas distribution layer; 17, leather cup seat; 18, leather cup; 19, swing disc piece; 20, driving piece; 16a, first gas distribution cover; 16b, second gas distribution cover; 21, sheet-shaped convex; 22, dot-shaped convex. DETAILED DESCRIPTION

[0046] The application will be further described below in detail with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and not to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0047] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0048] As Figures 1-4 shown, the figure is a schematic view of the overall structure of the noise reduction device of the gas pump provided by the present application, which comprises:

[0049] The gas distribution layer 16 is provided with at least one gas inlet channel and at least one gas outlet channel; the gas distribution layer 16 comprises a first gas distribution cover 16a and a second gas distribution cover 16b; the first gas distribution cover 16a is provided with a gas inlet area and a gas outlet area, the second gas distribution cover 16b is provided with a gas inlet 4 corresponding to the position of the gas inlet area, and a gas outlet 5 corresponding to the position of the gas outlet area, the gas inlet 4 and the gas inlet area together constitute a gas inlet channel, and the gas outlet 5 and the gas outlet area together constitute a gas outlet channel;

[0050] The air cushion 2 includes: a cushion body 3 and a unidirectional sheet 6 disposed thereon;

[0051] like Figure 2 As shown, an air distribution cushion 2 is disposed between a first air distribution cover 16a and a second air distribution cover 16b. One-way discs 6 are respectively provided at positions corresponding to the air inlet 4 and the air outlet 5. The one-way disc 6 corresponding to the air inlet 4 cooperates with the first air distribution cover 16a to allow unidirectional airflow from the air inlet area to the air inlet 4. The one-way disc 6 corresponding to the air outlet 5 cooperates with the second air distribution cover 16b to allow unidirectional airflow from the air outlet 5 to the air outlet area. At least one one-way disc 6 has a height difference between its central region and its edge region in a first direction to reduce the contact area between the one-way disc and the air distribution layer. The first direction is parallel to the thickness direction of the air distribution cushion 2.

[0052] This air pump device also includes: a compression unit and a drive unit, with the drive end of the drive unit and the compression unit being connected in a transmission manner;

[0053] When the air pump device is in operation, the external atmosphere enters the compression unit through the air inlet area, the one-way plate 6 corresponding to the air inlet 4, and the air inlet 4. When the drive unit drives the compression unit to operate, the gas is compressed, thereby forming high-pressure gas. The high-pressure gas is then transmitted to the gas output port of the air pump device through the air outlet 5, the one-way plate 6 corresponding to the air outlet 5, and the air outlet area.

[0054] It should be noted that the gas distribution layer 16 is composed of a first gas distribution cover 16a and a second gas distribution cover 16b. The first gas distribution cover 16a is divided into an inlet area and an outlet area. These two areas are used to prepare for the orderly flow of subsequent gas. The second gas distribution cover 16b has an inlet 4 at the position corresponding to the inlet area of ​​the first gas distribution cover 16a and an outlet 5 at the position corresponding to the outlet area. Through this combination, the inlet 4 and the inlet area are connected to form a complete inlet gas path, which allows external gas to smoothly enter the device along this path. The outlet 5 and the outlet area together form an outlet gas path, which facilitates the discharge of the processed gas (such as compressed high-pressure gas) from the device to the outside of the device along this path.

[0055] The air distribution pad 2 is between the first air distribution cover 16a and the second air distribution cover 16b, and plays a role of one-way air conduction control. The one-way flaps 6 are arranged on the air distribution pad 2 corresponding to the air inlet 4 and the air outlet 5. The presence of the one-way flaps 6 makes the gas flow in a specific direction, avoiding the situation of gas backflow and other situations that do not meet the normal working requirements of the air pump. Among them, the one-way flap 6 arranged corresponding to the air inlet 4 can ensure that the air inlet gas path realizes one-way conduction from the air inlet area to the air inlet 4, that is, only allows external gas to enter from the air inlet area to the air inlet 4; and the one-way flap 6 arranged corresponding to the air outlet 5 makes the air outlet gas path realize one-way conduction from the air outlet 5 to the air outlet area, ensuring that the internal gas can only be discharged to the air outlet area and the air outlet 5. At the same time, the central region and the edge region of the one-way flap 6 have a height difference in the first direction, where the first direction is parallel to the thickness direction of the air distribution pad 2. The design of the height difference plays a key role in the one-way conduction function of the one-way flap 6. For example, as shown in Figure 9 when the gas flows from the air inlet area to the air inlet 4, the gas pressure will act on the one-way flap 6, so that the one-way flap 6 can smoothly open to allow the gas to pass, and when the gas has a reverse flow trend, the one-way flap 6 can be hindered by the blocking action of the first air distribution cover 16a and the second air distribution cover 16b to hinder the reverse flow of the gas, and the air outlet is the same.

[0056] The air inlet area and the air outlet area of the air distribution layer are designed in cooperation with the air inlet and the air outlet, and the one-way flaps are arranged on the air distribution pad, which ensures that the air inlet gas path and the air outlet gas path can only be one-way conduction. This design can effectively avoid gas backflow, make the gas flow in the air pump device according to the predetermined and stable path, and improve the stability and reliability of the air pump working. In addition, the central region and the edge region of the one-way flap have a height difference in the direction parallel to the thickness of the air distribution pad, which helps to adjust the flow rate and pressure distribution when the gas passes through. For example, when the gas enters and exits the air pump device at high speed, the one-way flap with a height difference can buffer the airflow impact and disperse the airflow pressure, avoid the airflow forming a violent impact and turbulence in the local area, and at the same time reduce the contact area of the one-way flap with the first air distribution cover and the second air distribution cover, so as to reduce the patting sound generated between the one-way flap and the first air distribution cover and the second air distribution cover when the one-way flap swings, and further reduce the noise generated by the violent movement and collision of the gas from the source, providing a relatively quiet operating environment for the user.

[0057] Further, the thickness of the one-way flaps 6 is uniformly distributed, and the thickness of any two positions of the one-way flaps 6 is within a set tolerance range.

[0058] It should be noted that when the gas passes through the one-way sheet 6, the uniform thickness ensures that the gas pressure borne by the entire one-way sheet 6 is uniformly dispersed. If the thickness is not uniform, under the action of the gas pressure, the thinner area may first deform excessively, destroying the originally designed one-way conduction structure, causing the gas to possibly appear abnormal leakage or reverse flow, affecting the overall gas transmission efficiency and working stability of the gas pump device. Moreover, the uniform thickness also helps to ensure better adhesion of the one-way sheet 6 to the surrounding structures such as the gas distribution pad 2, the gas inlet 4, the gas outlet 5, etc. during assembly, making the entire gas passage more sealed and smooth, thereby ensuring that the gas pump device operates according to the expected gas flow direction. Here, the tolerance range is set according to actual needs.

[0059] Further, the central area of the one-way sheet 6 is raised to form an avoidance space 7 along the gas flow direction of the channel where it is located; as shown in Figure 10 , the cross-sectional shape of the avoidance space 7 is O-shaped, elliptical or U-shaped.

[0060] It should be noted that, as shown in Figure 7 , the longitudinal section of the avoidance space 7 is arc-shaped, which can accommodate a certain amount of compressed gas, thereby stabilizing the gas source and to some extent also suppressing noise. The cross-sectional shape of the avoidance space 7 on the same pad body 3 can be the same or different.

[0061] Further, the part of the one-way sheet 6 located around the avoidance space 7 forms a sealing area 10, and the sealing area 10 and the area corresponding to the avoidance space 7 are smoothly transitioned.

[0062] It should be noted that the edge of the avoidance space 7 is smoothly connected to the sealing area 10, and when the gas passes through the avoidance space 7 and flows to the periphery to prepare to enter the subsequent gas path link, the smooth transition can avoid the phenomenon of gas flow turbulence caused by structural mutations.

[0063] Further, the edge area of the one-way sheet 6 is provided with a raised structure away from the surface corresponding to the gas inlet 4 or close to the gas outlet 4, and here the raised structure is a sheet-shaped protrusion 21 or a point-shaped protrusion 22.

[0064] It should be noted that, as shown in Figure 11 , Figure 12 and Figure 13 , the sheet-shaped protrusion 21 at the position of the edge area of the one-way sheet 6 away from the gas inlet 4 will be distributed around the periphery of the side of the one-way sheet 6 away from the gas inlet 4; while the sheet-shaped protrusion 21 close to the gas outlet 5 is around the peripheral area of the side close to the gas outlet 5, and its size, shape, etc. will be reasonably designed and adapted according to the size specifications of the gas inlet 4 or the gas outlet 5 and the one-way sheet 6 itself, for reducing the beating area of the edge area of the one-way sheet 6 and the gas distribution layer 16. In addition, as shown inFigure 14 , Figure 15 and Figure 16 As shown, the dot-shaped protrusions 22 also possess the functions and advantages of the sheet-shaped protrusions 21; the only difference between the two is their structural layout. The dot-shaped protrusions 22 are formed by multiple evenly distributed protrusions, while the sheet-shaped protrusions 21 are sheet-like structures with a certain thickness.

[0065] Furthermore, such as Figure 2 As shown, a limiting block 11 is provided on the side of the first air distribution cover 16a near the air distribution pad 2 and at the edge area of ​​the one-way disc 6 corresponding to the air inlet 4, to prevent the corresponding one-way disc 6 from swinging from the air inlet 4 toward the first air distribution cover 16a. Similarly, a limiting block 11 can also be provided on the side of the second air distribution cover 16b near the one-way disc 6 to prevent the one-way disc 6 corresponding to the air outlet 5 from swinging toward the air outlet 5.

[0066] Furthermore, such as Figure 6 As shown, an installation hole 8 is provided at the center of the air distribution pad 2. The installation hole 8 is used to install the air distribution pad 2 onto the second air distribution cover 16b.

[0067] The gas-sealing cushion 2 is equipped with a gas-sealing structure, which includes:

[0068] Base 9, base 9 is connected to mounting hole 8;

[0069] Airflow channel 12 is provided in the air outlet area corresponding to the air distribution layer 16, and is used to connect the air outlet area and the external space.

[0070] It should be noted that the airflow channel 12 serves to guide the gas, such as... Figure 4 As shown, the gas discharged upward from the four unidirectional plates 6 in the middle passes through the airflow channel 12 to the middle position and is then discharged from the gas output port 1 of the air pump device.

[0071] Furthermore, such as Figure 1 and Figure 2 As shown, it also includes: an air pump housing, the interior of which is hollow to form an installation chamber; the air pump housing has a gas outlet 1 communicating with the gas outlet area of ​​the gas distribution layer 16; the air pump housing includes:

[0072] The base 14 is covered with a cover 15, and the space between the base 14 and the cover 15 forms an installation chamber; the gas outlet 1 is opened on the cover 15.

[0073] The gas outlet 1 is used to output gas, and it can be a nozzle structure for easy connection with gas pipes or other connectors. An air inlet can also be provided on the base 14 for introducing gas.

[0074] Furthermore, such as Figure 3As shown, a compression unit is also installed in the installation chamber: the compression unit includes a cup holder 17 and a cup 18 arranged in sequence from the side close to the base 14 to the side away from the base 14, and the space between the gas distribution layer 16 and the cover 15 is used to install the gas distribution pad 2; the driving end of the driving unit penetrates the base 14 and is connected with the cup 18.

[0075] As shown in the drawings, Figure 5 As shown, the gas in the base 14 enters the inlet area through the gas inlet hole, enters the cup 18 through the one-way sheet 6 and the gas inlet 4, is pressurized through the cup 18, and is output from the gas outlet 1 of the air pump through the gas outlet 5, the one-way sheet 6 and the outlet area. And the above-mentioned components can be connected by screws or external hooks.

[0076] Further, as shown in the drawings, Figure 10 As shown,

[0077] The swing disc 19 is located between the cup holder 17 and the base 14, and the tail end of the cup 18 penetrates the swing part of the swing disc 19 and is connected with the swing disc 19;

[0078] The driving part 20 has a driving shaft, and the end of the driving shaft is a driving end, and the torsion shaft at the end of the driving shaft is fixedly connected with the swing disc 19.

[0079] Here, the type of the driving part 20 is, for example, a driving motor.

[0080] The normal pressure gas enters the cup 18 through the gas inlet 4, is compressed by the upward movement of the cup 18, and is discharged by the gas outlet 5; when the cup 18 moves downward, low-pressure gas can enter the cavity of the cup 8 through the gas inlet 4. It should be noted that the cavity of the cup 18 can be provided as multiple, and the torsion shaft at the end of the driving shaft rotates to drive different cups 18 to make the same frequency and different stroke reciprocating motion.

[0081] Further, as shown in the drawings, Figure 5 As shown, the connecting position of the one-way sheet 6 and the pad 3 is provided with a reinforcing rib 13; the reinforcing rib 13 improves the resistance of the one-way sheet 6 in the process of beating the gas distribution, and reduces the back-beating force.

[0082] The application also provides an automobile seat pneumatic system comprising the above-mentioned noise-reducing air pump device; the automobile seat pneumatic system has the advantages and functions of the noise-reducing air pump device, which will not be described in detail here.

[0083] The above description is only the preferred embodiment of the present application and the explanation of the technical principles. It should be understood by those skilled in the art that the scope of the protection of the present application is not limited to the technical solutions formed by the specific combinations of the above technical features. It should also cover other technical solutions formed by the combinations of the above technical features or their equivalent features without departing from the concept of the present application. For example, the technical solutions formed by the mutual replacements of the above features and the technical features disclosed in the present application (but not limited to) with similar functions.

Claims

1. A noise-reduced air pump device, characterized in that The air distribution layer (16) is provided with at least one air inlet channel and at least one air outlet channel; the air distribution layer (16) comprises a first air distribution cover (16a) and a second air distribution cover (16b); the first air distribution cover (16a) is provided with an air inlet area and an air outlet area; the second air distribution cover (16b) is provided with an air inlet (4) corresponding to the position of the air inlet area and an air outlet (5) corresponding to the position of the air outlet area; the air inlet (4) and the air inlet area together form an air inlet channel, and the air outlet (5) and the air outlet area together form an air outlet channel; The air distribution pad (2) is arranged between the first air distribution cover (16a) and the second air distribution cover (16b), and the air distribution pad (2) is provided with a one-way sheet (6) corresponding to the positions of the air inlet (4) and the air outlet (5); the one-way sheet (6) corresponding to the air inlet (4) cooperates with the first air distribution cover (16a) to enable one-way conduction of the air inlet channel from the air inlet area to the air inlet (4); the one-way sheet (6) corresponding to the air outlet (5) cooperates with the second air distribution cover (16b) to enable one-way conduction of the air outlet channel from the air outlet (5) to the air outlet area; the center area of at least one one-way sheet (6) has a height difference with the edge area in the first direction, so as to reduce the contact area of the one-way sheet with the air distribution layer (16); The first direction is parallel to the thickness direction of the air distribution pad (2); The air pump device further comprises a compression unit and a driving unit, and the driving end of the driving unit is in transmission connection with the compression unit. The center area of the one-way sheet (6) is protruded to form an avoiding space (7) along the gas flow direction of the air inlet channel or the air outlet channel; the cross-sectional shape of the avoiding space (7) is O-shaped, oval-shaped or U-shaped.

2. The noise-reduced air pump device of claim 1, wherein, The thickness of the one-way sheet (6) is uniformly distributed, and the thickness of the one-way sheet (6) at any two positions is within a set tolerance range.

3. A noise-reduced air pump device according to claim 2, characterized in that The part of the one-way sheet (6) around the avoiding space (7) forms a sealing area (10), and the sealing area (10) and the area corresponding to the avoiding space (7) are smoothly transitioned.

4. The noise-reduced air pump device of claim 2, wherein, The edge area of the one-way sheet (6) is provided with a protruding structure corresponding to the surface away from the air inlet (4) or close to the air outlet (5).

5. The noise-reduced air pump device of claim 1, wherein, The protruding structure is a sheet-shaped protrusion (21) or a point-shaped protrusion (22).

6. A noise-reduced air pump device according to claim 5, characterized in that The first air distribution cover (16a) is provided with a limiting block (11) corresponding to the edge area of the one-way sheet (6) close to the air inlet (4), so as to prevent the corresponding one-way sheet (6) from swinging from the air inlet (4) to the side of the first air distribution cover (16a).

7. The noise-reduced air pump device of claim 1, wherein, The air distribution pad (2) is provided with a mounting hole (8) at the center position, and the mounting hole (8) is used for mounting the air distribution pad (2) on the second air distribution cover (16b); 8. The noise-reduced air pump device of claim 1, wherein, The air distribution pad (2) is provided with a gas sealing structure, and the gas sealing structure comprises: ​ A base (9) is connected with the mounting hole (8); An airflow channel (12) is arranged corresponding to the air outlet area of the air distribution layer (16) to connect the air outlet area with the external space.

9. The noise-reduced air pump device of claim 1, wherein, Further comprising: A gas pump housing with a hollow installation chamber inside; A gas outlet (1) is arranged on the gas pump housing to communicate with the air outlet area of the air distribution layer (16); the gas pump housing comprises: A base (14) is covered with a cover (15), and the space between the base (14) and the cover (15) forms an installation chamber; the gas outlet (1) is arranged on the cover (15); The installation chamber further comprises the compression unit: the compression unit comprises a cup holder (17) and a cup (18) arranged in sequence from the side close to the base (14) to the side away from the base (14), and the space between the air distribution layer (16) and the cover (15) is used to install the air distribution pad (2); the driving end of the driving unit penetrates the base (14) and is connected with the cup (18); The driving unit comprises: A swing disc (19) is arranged between the cup holder (17) and the base (14), and the tail end of the cup (18) penetrates the swing part of the swing disc (19) and is connected with the swing disc (19); A driving member (20) has a driving shaft, the end of the driving shaft is the driving end, and the torsion shaft of the end of the driving shaft is fixedly connected with the swing disc (19).

10. An automotive seat pneumatic system characterized by, The noise-reducing gas pump device comprises the air distribution pad (2), the base (14), the cover (15), the gas pump housing, the gas outlet (1), the cup holder (17), the cup (18), the swing disc (19), and the driving member (20).

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