Automobile seat ventilation device

Abstract

The invention relates to the technical field of seat ventilation, and discloses an automobile seat ventilation device which comprises a seat supporting assembly and an air supply assembly, the seat supporting assembly is fixed to a seat frame, the seat supporting assembly is used for supporting a seat leather sheath, and the air supply assembly is used for supplying air into the seat supporting assembly; the air supply assembly comprises a sealing plate and a fixing plate, the sealing plate and the fixing plate are both fixed to the seat frame, and the fixing plate is fixed to the supporting net plate. The mounting box is fixed on the side wall of the sealing plate, and a fan is arranged in the mounting box; and the temperature adjusting assembly is arranged on the side wall of the sealing plate, and the temperature adjusting assembly communicates with the mounting box. According to the seat ventilation device, through cooperation of the temperature adjusting assembly and the air supply assembly, the technical effect that a seat is heated or cooled immediately in the seat ventilation process is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of seat ventilation, in particular to a vehicle seat ventilation device. Background Art

[0002] The seat ventilation system is an important innovation in modern car design, which aims to provide drivers and passengers with a more comfortable and dry riding experience through scientific airflow management. This system cleverly combines aerodynamics and ergonomics principles, and uses advanced electronic technology control to achieve precise ventilation inside the seat, effectively coping with the discomfort caused by body heat accumulation and increased sweating during long-term driving or riding.

[0003] In the prior art, after the driver and passengers sit on the seats, the gas flow efficiency in the part of the seat that contacts the human body is low due to the obstruction of the human body, which in turn causes the seat to be unable to adjust the temperature under the action of the seat ventilation device. For example, in summer, even if the seat is equipped with a seat ventilation mechanism, the seat temperature cannot be lowered to an appropriate temperature range in a short time. Therefore, the comfort of the driver and passengers still cannot be effectively improved. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The purpose of the present invention is to solve the problem that the seat cannot be cooled or heated efficiently during the seat ventilation process, and to propose a vehicle seat ventilation device.

[0006] (II) Technical solution

[0007] The technical solution of the present invention to solve the above technical problems is as follows:

[0008] A vehicle seat ventilation device, comprising:

[0009] A seat support assembly and an air supply assembly, wherein the seat support assembly is fixed to the seat frame, the seat support assembly is used to support the seat leather cover, and the air supply assembly is used to supply air into the seat support assembly;

[0010] Wherein, the air supply component comprises:

[0011] A sealing plate and a fixing plate, wherein the sealing plate and the fixing plate are both fixed to the seat frame, and the fixing plate is fixed to the supporting mesh plate;

[0012] An installation box, the installation box is fixed on the side wall of the sealing plate, and a fan is arranged in the installation box;

[0013] A temperature regulating component is arranged on the side wall of the sealing plate, and the temperature regulating component is communicated with the installation box.

[0014] As a further solution of the present invention, the temperature adjustment component includes:

[0015] A box body, wherein the box body is fixed on the side wall of the sealing plate;

[0016] A semiconductor refrigeration sheet, wherein the semiconductor refrigeration sheet is fixed on the inner wall of the box body, a second fin is provided at the hot end of the semiconductor refrigeration sheet, and a third fin is provided at the cold end of the semiconductor refrigeration sheet;

[0017] A partition, the partition is fixed on the inner wall of the box body, and the top and bottom of the partition are rotatably provided with a first movable plate and a second movable plate;

[0018] A heating component, wherein the heating component is arranged on the second movable plate;

[0019] A reset component, wherein the reset component is arranged on the inner wall of the box body, and the reset component is fixed to the first movable plate;

[0020] A power assembly is arranged on the side wall of the box body and is used to drive the second movable plate to rotate.

[0021] As a further solution of the present invention, the heating component comprises:

[0022] A heating plate, the heating plate is fixed on the side wall of the second movable plate, and a heating wire is embedded in the heating plate;

[0023] The first fin is fixed to the heating plate.

[0024] As a further solution of the present invention, the reset component includes:

[0025] A metal spring, one end of which is fixed to the inner wall of the box body, and the other end of which is fixed to the first movable plate.

[0026] As a further solution of the present invention, the power assembly comprises:

[0027] A bracket, the bracket is fixed on the side wall of the box body, and a motor is fixed on the bracket;

[0028] A transmission rod is rotatably arranged on the side wall of the box body, and the output shaft of the motor is fixed to the transmission rod. A rotating shaft is fixed to the side wall of the second movable plate, and the rotating shaft is fixed to the transmission rod.

[0029] As a further solution of the present invention, the temperature adjustment component further includes:

[0030] A cover body, wherein the cover body is fixed to the bottom of the box body, a plurality of ventilation holes are provided at the top and bottom of the box body near the third fin, and the plurality of ventilation holes at the bottom of the box body are all inside the cover body;

[0031] A hose, one end of which is connected to the installation box, and the other end of which is connected to the cover body;

[0032] Two fixing rods, both of which are fixed on the side wall of the sealing plate;

[0033] A slide groove, the slide groove is provided on the side wall of the box body, and a connecting rod is slidably arranged in the slide groove;

[0034] A moving rod, wherein the moving rod is fixed at the bottom of the connecting rod and is located between two fixed rods, and the hose is located between the moving rod and the two fixed rods;

[0035] A connecting rod, one end of which is rotatably connected to the connecting rod, and the other end of which is rotatably connected to the transmission rod.

[0036] As a further solution of the present invention, the air supply assembly further includes:

[0037] A connecting seat, wherein the connecting seat is fixed on the side wall of the fixing plate;

[0038] A plurality of air outlet pipes are arranged at equal distances through the side wall of the connecting seat;

[0039] A connecting pipe, one end of which is connected to the connecting seat, and the other end of which is arranged through the top of the box body;

[0040] An air supply pipe, one end of which is connected to the installation box, and the other end of which is arranged through the bottom of the box body;

[0041] A negative pressure pipe, one end of which is connected to the installation box, and the other end of which passes through the side wall of the sealing plate.

[0042] As a further solution of the present invention, the seat support assembly comprises:

[0043] A support mesh plate is fixed to the seat frame, a support sponge is fixed on the support mesh plate, a plurality of circular holes are opened on the side wall of the support sponge, and the plurality of circular holes correspond to the plurality of air outlet pipes one by one, and the air outlet pipes are located in the circular holes.

[0044] (III) Beneficial effects

[0045] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0046] The present invention effectively improves the gas flow efficiency inside the seat by introducing a combined design of a seat support component and an air supply component. The seat support component not only firmly supports the seat leather cover, but also serves as a carrier of the air supply component, so that the airflow generated by the fan can be directly and efficiently transmitted to the bottom of the seat leather cover, and then evenly distributed to the contact surface between the driver and the seat through the air vents on the seat leather cover. This design overcomes the gas flow obstacle caused by human body obstruction and ensures the maximization of the ventilation effect. Secondly, the fixing method of the sealing plate and the fixing plate in the air supply component to the seat frame, as well as the fixed connection between the fixing plate and the supporting mesh plate, jointly construct a stable and sealed ventilation channel. This structural design not only ensures that the airflow generated by the fan can smoothly enter the interior of the seat, but also prevents the leakage of airflow and the intrusion of external impurities, thereby improving the overall performance and durability of the ventilation system. Furthermore, the fan arranged in the installation box is the core component of the air supply component. The selection of its position and the fixing method also fully consider the ventilation effect and noise control. The fan is fixed on the side of the sealing plate. The seat ventilation device of the present invention effectively solves the problems of low gas flow efficiency and poor temperature regulation effect mentioned in the background art through its unique technical features, and provides a more comfortable and dry riding experience for the passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0048] Figure 2 This is a schematic diagram of the supporting mesh plate and supporting sponge structure of the present invention;

[0049] Figure 3 This is a schematic diagram of the supporting mesh plate and the air outlet pipe structure of the present invention;

[0050] Figure 4 This is a schematic diagram of the structure of the connecting seat and the air outlet pipe of the present invention;

[0051] Figure 5 This is a schematic diagram of the box body, the installation box and the air supply pipe structure of the present invention;

[0052] Figure 6 It is a schematic diagram of the cross-sectional structure of the box body of the present invention.

[0053] In the figure: 1. sealing plate; 2. fixing plate; 3. supporting mesh plate; 4. box body; 5. ventilation hole; 6. connecting pipe; 7. cover body; 8. installation box; 9. negative pressure pipe; 10. supporting sponge; 11. round hole; 12. air outlet pipe; 13. connecting seat; 14. air supply pipe; 15. bracket; 16. motor; 17. transmission rod; 18. connecting rod; 19. slide groove; 20. connecting rod; 21. fixing rod; 22. moving rod; 23. metal spring; 24. first movable plate; 25. partition; 26. heating plate; 27. first fin; 28. second movable plate; 29. ​​rotating shaft; 30. second fin; 31. semiconductor refrigeration plate; 32. third fin; 33. hose. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] Combination Figure 1-Figure 6 As shown, a vehicle seat ventilation device of the present invention comprises:

[0056] A seat support assembly and an air supply assembly, wherein the seat support assembly is fixed to the seat frame, the seat support assembly is used to support the seat leather cover, and the air supply assembly is used to supply air into the seat support assembly;

[0057] Among them, the air supply components include:

[0058] A sealing plate 1 and a fixing plate 2, wherein the sealing plate 1 and the fixing plate 2 are both fixed to the seat frame, and the fixing plate 2 is fixed to the supporting mesh plate 3;

[0059] An installation box 8 is fixed on the side wall of the sealing plate 1, and a fan is arranged in the installation box 8;

[0060] The temperature regulating component is arranged on the side wall of the sealing plate 1 , and the temperature regulating component is communicated with the installation box 8 .

[0061] In a preferred embodiment, the present invention can be further configured as follows: Figure 5 , Figure 6 As shown, the temperature regulation assembly includes:

[0062] A box body 4, which is fixed on the side wall of the sealing plate 1;

[0063] A semiconductor refrigeration sheet 31 is fixed on the inner wall of the box body 4. A second fin 30 is provided at the hot end of the semiconductor refrigeration sheet 31, and a third fin 32 is provided at the cold end of the semiconductor refrigeration sheet 31.

[0064] The partition 25 is fixed on the inner wall of the box body 4, and the top and bottom of the partition 25 are rotatably provided with a first movable plate 24 and a second movable plate 28;

[0065] A heating assembly, the heating assembly is arranged on the second movable plate 28;

[0066] A reset component, which is arranged on the inner wall of the box body 4 and is fixed to the first movable plate 24;

[0067] A power assembly is arranged on the side wall of the box body 4 and is used to drive the second movable plate 28 to rotate.

[0068] In a preferred embodiment, the present invention can be further configured as follows: Figure 6 As shown, the heating assembly includes:

[0069] A heating plate 26, the heating plate 26 is fixed on the side wall of the second movable plate 28, and a heating wire is embedded in the heating plate 26;

[0070] The first fin 27 and the heating plate 26 are fixed.

[0071] The heating wire on the heating plate 26 works, so that the temperature of the heating plate 26 increases, and thus the temperature of the first fin 27 increases.

[0072] The reset components include:

[0073] The metal spring piece 23 has one end fixed to the inner wall of the box body 4 , and the other end fixed to the first movable plate 24 .

[0074] When delivering cold air to the seat leather cover, the air flows through the first movable plate 24, pushing the first movable plate 24 to rotate, so that the low-temperature air can fully contact the second fins 30, ensuring the cooling efficiency of the air;

[0075] When delivering warm air to the seat leather cover, the first movable plate 24 is fixed under the action of the metal spring 23, and the sealing effect of the first movable plate 24 prevents the heated warm air from escaping, thereby ensuring the heating efficiency of the seat.

[0076] In a preferred embodiment, the present invention can be further configured as follows: Figure 1 , Figure 5 As shown, the power assembly includes:

[0077] A bracket 15, the bracket 15 is fixed on the side wall of the box body 4, and a motor 16 is fixed on the bracket 15;

[0078] The transmission rod 17 is rotatably arranged on the side wall of the box body 4, and the output shaft of the motor 16 is fixed to the transmission rod 17. A rotating shaft 29 is fixed to the side wall of the second movable plate 28, and the rotating shaft 29 is fixed to the transmission rod 17.

[0079] The temperature regulation assembly also includes:

[0080] A cover body 7, the cover body 7 is fixed to the bottom of the box body 4, a plurality of ventilation holes 5 are provided at the top and bottom of the box body 4 near the third fin 32, and the plurality of ventilation holes 5 at the bottom of the box body 4 are all located inside the cover body 7;

[0081] A hose 33, one end of the hose 33 is connected to the installation box 8, and the other end of the hose 33 is connected to the cover body 7;

[0082] Two fixing rods 21, both fixing rods 21 are fixed on the side wall of the sealing plate 1;

[0083] A slide groove 19 is provided on the side wall of the box body 4, and a connecting rod 20 is slidably arranged in the slide groove 19;

[0084] A moving rod 22, the moving rod 22 is fixed at the bottom of the connecting rod 20, and the moving rod 22 is between the two fixed rods 21, and the hose 33 is between the moving rod 22 and the two fixed rods 21;

[0085] The connecting rod 18 has one end that is rotatably connected to the connecting rod 20 , and the other end that is rotatably connected to the transmission rod 17 .

[0086] The switch of the motor 16 is turned on. When the motor 16 is working, the transmission rod 17 is driven to rotate. When the transmission rod 17 rotates, the connecting rod 20 is driven to move along the slide groove 19 through the connecting rod 18. During the movement of the connecting rod 20, the moving rod 22 enters between the two fixed rods 21, and then the flexible pipe 33 is squeezed by the moving rod 22 and the two fixed rods 21, so that the flexible pipe 33 is sealed;

[0087] When the transmission rod 17 rotates, the second movable plate 28 is driven to rotate through the rotating shaft 29. At this time, through the sealing of the second movable plate 28, the partition plate 25 and the first movable plate 24, the gas when the fan is working directly flows through the surface of the first fin 27, and then enters the connecting seat 13 through the connecting pipe 6, and finally is output through the air outlet pipe 12. Therefore, when used in winter, it is only necessary to turn on the switch of the motor 16 and adjust the flow direction of the gas so that the airflow is heated when passing through the first fin 27. At the same time, the hose 33 is also sealed to avoid the reduction of heat exchange efficiency due to the small amount of gas during the circulation process.

[0088] In a preferred embodiment, the present invention can be further configured as follows: Figure 3 , Figure 4 As shown, the air supply component also includes:

[0089] A connecting seat 13, the connecting seat 13 is fixed on the side wall of the fixing plate 2;

[0090] A plurality of air outlet pipes 12 are arranged at equal distances through the side wall of the connecting seat 13;

[0091] A connecting tube 6, one end of which is connected to the connecting seat 13, and the other end of which is arranged through the top of the box body 4;

[0092] An air supply pipe 14, one end of which is connected to the mounting box 8, and the other end of which is arranged through the bottom of the box body 4;

[0093] A negative pressure pipe 9 , one end of which is connected to the installation box 8 , and the other end of which passes through the side wall of the sealing plate 1 .

[0094] In a preferred embodiment, the present invention can be further configured as follows: Figure 2 As shown, the seat support assembly includes:

[0095] The support mesh plate 3 is fixed to the seat frame, a support sponge 10 is fixed on the support mesh plate 3, a plurality of circular holes 11 are opened on the side wall of the support sponge 10, and the plurality of circular holes 11 correspond to the plurality of air outlet pipes 12 one by one, and the air outlet pipes 12 are located in the circular holes 11.

[0096] The specific working principle of a vehicle seat ventilation device of the present invention is as follows:

[0097] When used in summer, the switch of the semiconductor refrigeration sheet 31 is turned on. When the semiconductor refrigeration sheet 31 works, the temperature at the second fin 30 is low, while the temperature at the third fin 32 is high. Then the switch of the ventilator is turned on. When the ventilator works, the installation box 8 is in a negative pressure state, and then the gas between the fixed plate 2 and the supporting mesh plate 3 in the seat is extracted through the negative pressure pipe 9. Due to the effect of the sealing plate 1, the fixed plate 2 and the supporting mesh plate 3 are in a sealed state in cooperation with the seat frame. Therefore, when the air between the fixed plate 2 and the supporting mesh plate 3 is extracted, the gas in the car enters the supporting sponge 10 through the holes on the seat leather cover;

[0098] When the fan is working, the gas in the installation box 8 gradually rises, so that part of the gas in the installation box 8 enters the box body 4 through the air supply pipe 14 and contacts the second fin 30, so that the gas temperature at the second fin 30 is relatively low, and the low-temperature gas pushes the first movable plate 24 to rotate and compresses the metal spring 23. When the gas stops being input, the first movable plate 24 is reset under the action of the metal spring 23, and the low-temperature gas passes through the first movable plate 24 and then enters the connecting seat 13 through the connecting pipe 6, and is finally output through a plurality of air outlet pipes 12. Since the air outlet pipe 12 is in the circular hole 11, the low-temperature gas output through the air outlet pipe 12 is directly blown to the seat leather cover, so that the seat leather cover can be cooled in a short time, and the negative pressure between the fixing plate 2 and the supporting mesh plate 3 is cooperated, so that the low-temperature gas exchanges heat with the seat leather cover and is then drawn into the installation box 8 by the fan again, so that the low-temperature airflow can be circulated and blown to the seat leather cover to ensure the heat dissipation effect of the seat leather cover in summer;

[0099] In the above process, part of the gas in the installation box 8 enters the cover body 7 through the hose 33, and then passes through the ventilation holes 5 on the box body 4, so that the gas in the cover body 7 can flow in the box body 4 through the two ventilation holes 5, and the heat of the third fin 32 is taken away by the flowing air, so as to ensure that the semiconductor cooling plate 31 can work normally;

[0100] When used in winter, first turn on the switch of the motor 16. When the motor 16 is working, it drives the transmission rod 17 to rotate. When the transmission rod 17 rotates, it drives the connecting rod 20 to move along the slide groove 19 through the connecting rod 18. During the movement of the connecting rod 20, the moving rod 22 enters between the two fixed rods 21, and then the hose 33 is squeezed by the moving rod 22 and the two fixed rods 21, so that the hose 33 is sealed;

[0101] When the transmission rod 17 rotates, the second movable plate 28 is driven to rotate through the rotating shaft 29. At this time, through the sealing of the second movable plate 28, the partition plate 25 and the first movable plate 24, the gas when the fan is working directly flows through the surface of the first fin 27, and then enters the connecting seat 13 through the connecting pipe 6, and finally is output through the air outlet pipe 12. Therefore, when used in winter, it is only necessary to turn on the switch of the motor 16 and adjust the flow direction of the gas so that the airflow is heated when passing through the first fin 27. At the same time, the hose 33 is also sealed to avoid the reduction of heat exchange efficiency due to the small amount of gas during the circulation process.

[0102] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0103] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle seat ventilation device, characterized in that: include: A seat support assembly and an air supply assembly, wherein the seat support assembly is fixed to the seat frame, the seat support assembly is used to support the seat leather cover, and the air supply assembly is used to supply air into the seat support assembly; Wherein, the air supply component comprises: A sealing plate (1) and a fixing plate (2), wherein the sealing plate (1) and the fixing plate (2) are both fixed to the seat frame, and the fixing plate (2) and the supporting mesh plate (3) are fixed; An installation box (8), the installation box (8) being fixed on a side wall of the sealing plate (1), and a fan being arranged in the installation box (8); A temperature regulating component is arranged on the side wall of the sealing plate (1), and the temperature regulating component is communicated with the installation box (8).

2. The vehicle seat ventilation device according to claim 1, characterized in that: The temperature regulating component comprises: A box body (4), wherein the box body (4) is fixed on a side wall of the sealing plate (1); A semiconductor refrigeration sheet (31), the semiconductor refrigeration sheet (31) being fixed on the inner wall of the box body (4), the hot end of the semiconductor refrigeration sheet (31) being provided with a second fin (30), and the cold end of the semiconductor refrigeration sheet (31) being provided with a third fin (32); A partition (25), the partition (25) being fixed on the inner wall of the box body (4), and the top and bottom of the partition (25) are rotatably provided with a first movable plate (24) and a second movable plate (28); A heating component, wherein the heating component is arranged on the second movable plate (28); A reset component, the reset component is arranged on the inner wall of the box body (4), and the reset component and the first movable plate (24) are fixed; A power assembly is arranged on the side wall of the box body (4), and is used to drive the second movable plate (28) to rotate.

3. The vehicle seat ventilation device according to claim 2, characterized in that: The heating component comprises: A heating plate (26), the heating plate (26) being fixed on a side wall of the second movable plate (28), and the heating plate (26) being embedded with an electric heating wire; A first fin (27), wherein the first fin (27) and the heating plate (26) are fixed.

4. The vehicle seat ventilation device according to claim 2, characterized in that: The reset component comprises: A metal spring (23), one end of the metal spring (23) is fixed to the inner wall of the box body (4), and the other end of the metal spring (23) is fixed to the first movable plate (24).

5. The vehicle seat ventilation device according to claim 2, characterized in that: The power assembly comprises: A bracket (15), the bracket (15) being fixed on a side wall of the box body (4), and a motor (16) being fixed on the bracket (15); A transmission rod (17) is rotatably arranged on the side wall of the box body (4), and the output shaft of the motor (16) and the transmission rod (17) are fixed; a rotating shaft (29) is fixed on the side wall of the second movable plate (28), and the rotating shaft (29) and the transmission rod (17) are fixed.

6. The vehicle seat ventilation device according to claim 5, characterized in that: The temperature regulating component also includes: A cover body (7), the cover body (7) being fixed to the bottom of the box body (4), a plurality of ventilation holes (5) being provided at the top and bottom of the box body (4) near the third fin (32), and the plurality of ventilation holes (5) at the bottom of the box body (4) are all located inside the cover body (7); A hose (33), one end of the hose (33) being connected to the installation box (8), and the other end of the hose (33) being connected to the cover body (7); Two fixing rods (21), both of which are fixed on the side wall of the sealing plate (1); A slide groove (19), wherein the slide groove (19) is provided on the side wall of the box body (4), and a connecting rod (20) is slidably arranged in the slide groove (19); A moving rod (22), wherein the moving rod (22) is fixed at the bottom of the connecting rod (20), and the moving rod (22) is located between the two fixed rods (21), and the hose (33) is located between the moving rod (22) and the two fixed rods (21); A connecting rod (18), one end of the connecting rod (18) is rotatably connected to a connecting rod (20), and the other end of the connecting rod (18) is rotatably connected to a transmission rod (17).

7. The vehicle seat ventilation device according to claim 1, characterized in that: The air supply component also includes: A connecting seat (13), wherein the connecting seat (13) is fixed on a side wall of the fixing plate (2); A plurality of air outlet pipes (12), wherein the plurality of air outlet pipes (12) are arranged at equal distances through the side wall of the connecting seat (13); A connecting pipe (6), one end of which is connected to the connecting seat (13), and the other end of which is arranged through the top of the box body (4); An air supply pipe (14), one end of the air supply pipe (14) being connected to the installation box (8), and the other end of the air supply pipe (14) being arranged through the bottom of the box body (4); A negative pressure pipe (9), one end of which is connected to the installation box (8), and the other end of which passes through the side wall of the sealing plate (1).

8. The vehicle seat ventilation device according to claim 7, characterized in that: The seat support assembly comprises: A support mesh plate (3) is fixed to a seat frame, a support sponge (10) is fixed to the support mesh plate (3), a side wall of the support sponge (10) is provided with a plurality of circular holes (11), and the plurality of circular holes (11) correspond to a plurality of air outlet pipes (12) in a one-to-one manner, and the air outlet pipes (12) are located in the circular holes (11).

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