Breathing air device for vehicle type seat, vehicle type seat and automobile

Abstract

The utility model discloses a breathing air device for a car type seat, the car type seat and a car, and relates to the technical field of car seat ventilation, the breathing air device for the car type seat comprises a fan, a lower shell, an inner shell, an upper shell and a valve assembly, the fan is used for providing power for air flowing; the inner shell is buckled on the inner side of the lower shell, a containing cavity is defined by the inner shell and the lower shell, the fan is arranged in the containing cavity, the containing cavity is provided with an air outlet and an air inlet, the air outlet is formed in the circumferential direction of the fan, and the air inlet is formed in the position, at one axial end of the fan, of the inner shell; the upper shell is buckled on the lower shell, the inner shell is located between the upper shell and the lower shell, and an air inlet duct and an air outlet duct which are separated from each other are arranged between the upper shell and the lower shell; the valve assembly is configured to close the outer air suction opening and the inner air blowing opening while opening the inner air suction opening and the outer air blowing opening and close the inner air suction opening and the outer air blowing opening while opening the outer air suction opening and the inner air blowing opening. The ventilation system can meet different preference requirements of drivers or passengers for the ventilation system.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seat ventilation, in particular to a breathing air device for a vehicle-type seat, a vehicle-type seat and a vehicle. Background Art

[0002] As living standards improve, cars have become a popular means of transportation, and people's demands for vehicle comfort are growing. Car seat comfort is crucial for driver comfort, and more and more manufacturers are adopting seats with ventilation functions. Different drivers have different preferences for ventilation systems, with some preferring suction and others preferring blow-through. Existing fans can only blow or suck air, without the ability to switch between blowing and sucking. Utility Model Content

[0003] The purpose of the present utility model is to provide a breathing air device for a vehicle seat, a vehicle seat and a vehicle, so as to solve the problems existing in the above-mentioned prior art and meet the different preferences of drivers or passengers for ventilation systems.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides a breathing air device for a vehicle seat, comprising:

[0006] A fan, wherein the fan is a centrifugal fan, used to provide power for air flow;

[0007] lower shell;

[0008] An inner shell, the inner shell is buckled on the inner side of the lower shell, and an accommodating cavity is enclosed between the inner shell and the lower shell. The fan is disposed in the accommodating cavity, and the accommodating cavity is provided with an air outlet and an air inlet. The air outlet is arranged in the circumference of the fan, and the air inlet is arranged on the inner shell at one axial end of the fan;

[0009] An upper shell, the upper shell being buckled onto the lower shell, the inner shell being located between the upper shell and the lower shell, an air inlet duct and an air outlet duct being separated from each other being provided between the upper shell and the lower shell, the air outlet duct being connected to the air outlet, an air inlet cavity being formed by a gap between the inner bottom surface of the upper shell and the top surface of the inner shell, the air inlet duct, the air inlet cavity and the air inlet being connected in sequence; an inner air suction port and an outer air suction port being provided on the air inlet duct; an inner air blowing port and an outer air blowing port being provided on the air outlet duct; and

[0010] The valve assembly is configured to open the inner air intake port and the outer air outlet while closing the outer air intake port and the inner air outlet, and to open the outer air intake port and the inner air outlet while closing the inner air intake port and the outer air outlet.

[0011] Preferably, one end of the air inlet duct is connected to the air inlet cavity, the other end is the inner air suction port, and the outer air suction port is arranged on the side of the air inlet duct; one end of the air outlet duct is connected to the air outlet, the other end is the inner air blowing port, and the outer air blowing port is arranged on the side of the air outlet duct; the valve assembly includes a driving device, a first baffle and a second baffle, the first baffle can be rotatably arranged in the air inlet duct, and the driving device can drive the first baffle to rotate to block the outer air suction port And the inner air intake port is connected to the air inlet, and the driving device can also drive the first baffle to rotate to cover the inner air intake port and connect the outer air intake port to the air inlet; the second baffle can be rotatably arranged in the air outlet duct, and the driving device can drive the second baffle to rotate to cover the outer air outlet and connect the inner air outlet to the air outlet, and the driving device can also drive the second baffle to rotate to cover the inner air outlet and connect the outer air outlet to the air outlet.

[0012] Preferably, the driving device includes a motor, a driving gear and a driven gear, a first rotating shaft is constructed at one end of the first baffle, the first rotating shaft can be rotatably set in the air inlet duct, one end of the first rotating shaft is connected to the motor shaft of the motor, and the other end is fixedly provided with the driving gear, a second rotating shaft is constructed at one end of the second baffle, the second rotating shaft can be rotatably set in the air outlet duct, the driven gear is fixedly provided at one end of the second rotating shaft, and the driven gear and the driving gear are meshed for transmission.

[0013] Preferably, a grille structure is fixedly provided at the external air intake port and the external air blowing port.

[0014] Preferably, the air inlet duct and the air outlet duct are both ducts with rectangular cross-sections.

[0015] Preferably, the bottom surfaces of the air inlet duct and the air outlet duct are respectively provided with a first connecting surface and a second connecting surface extending from one end to the other end in the width direction, and the width directions of the bottom surfaces of the air outlet duct and the air inlet duct are perpendicular to the direction of the air flow within themselves. When the first baffle is rotated to a state where the inner air intake port is closed, the first baffle is tilted and the bottom surface of the first baffle is in contact with the first connecting surface; when the second baffle is rotated to a state where the inner air blowing port is closed, the second baffle is tilted and the bottom surface of the second baffle is in contact with the second connecting surface.

[0016] Preferably, the first connecting surface and the second connecting surface are formed in grooves opened on the bottom surfaces of the air inlet duct and the air outlet duct.

[0017] Preferably, the cross-sectional size of the air inlet duct is larger than the cross-sectional size of the air outlet duct.

[0018] The utility model also provides a vehicle-type seat, comprising the above-mentioned breathing air device for the vehicle-type seat.

[0019] The utility model also provides a car, comprising the car-type seat as described above.

[0020] Compared with the prior art, the utility model has achieved the following technical effects:

[0021] The breathing air device of the utility model allows the driver or passenger to adjust the blowing or suction according to personal preference, thereby realizing a personalized seat environment. In addition, the structure of the air inlet is optimized to enhance the air intake efficiency, thereby improving the effect of blowing or suctioning.

[0022] Furthermore, the fan adopts a centrifugal fan with optimized air duct design, which reduces noise and energy consumption while providing good ventilation effect.

[0023] Furthermore, a motor drives the two baffles to deflect through a gear set, and the blowing and suction of air are changed by controlling the deflection of the baffles. The structure is simple, the operation is reliable, and the space occupied is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 The utility model provides a structural schematic diagram of a breathing air device for a vehicle seat;

[0026] Figure 2 for Figure 1 Schematic diagram of the internal structure;

[0027] Figure 3 This is a structural diagram of the inner shell, lower shell, fan and motor in an embodiment of the present utility model;

[0028] Figure 4 for Figure 3 A magnified view of the structure at point A;

[0029] Figure 5 Schematic diagram of the upper shell structure;

[0030] Figure 6 Schematic diagram of the valve assembly and its matching housing structure (including part of the upper shell and part of the lower shell);

[0031] Figure 7 It is a structural schematic diagram in the internal suction mode;

[0032] Figure 8 It is a structural schematic diagram in the internal blowing mode;

[0033] Figure 9 for Figure 1 A top view of

[0034] Figure 10 for Figure 9 Middle AA section view;

[0035] Figure 11 for Figure 10 A magnified view of the structure at B in the middle;

[0036] Figure 12 for Figure 1 A view in another direction;

[0037] Figure 13 for Figure 12 A magnified view of the structure at C in the middle;

[0038] In the figure: 11-inner air intake; 12-inner air outlet; 13-external air intake; 14-external air outlet; 15-air inlet duct; 16-air outlet duct; 17-side air inlet duct; 18-air inlet cavity.

[0039] 21-upper shell; 22-inner shell; 23-lower shell; 24-motor placement; 25-gear set placement; 26-partition.

[0040] 31 - fan; 32 - air inlet; 33 - air outlet; 34 - first connecting surface; 35 - second connecting surface; 36 - extended connecting surface; 37 - third connecting surface; 38 - slot.

[0041] 41 - second baffle; 42 - first baffle; 43 - motor; 44 - driving gear; 45 - driven gear; 46 - first rotating shaft; 47 - second rotating shaft.

[0042] 51-card protrusion; 52-card frame. DETAILED DESCRIPTION

[0043] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0045] The utility model provides a breathing air device for a vehicle seat, such as Figures 1 to 11 As shown, it includes: a fan 31, a lower shell 23, an inner shell 22, an upper shell 21 and a valve assembly.

[0046] The fan 31 is a centrifugal fan, which is used to provide power for air flow.

[0047] The inner shell 22 is buckled onto the inner side of the lower shell 23, and an accommodating cavity is enclosed between the inner shell 22 and the lower shell 23. The fan 31 is arranged in the accommodating cavity, and the accommodating cavity is provided with an air outlet 33 and an air inlet 32. The air outlet 33 is arranged in the circumference of the fan 31, and the air inlet 32 is arranged on the inner shell 22 at one axial end of the fan 31. The air inlet of a traditional centrifugal fan is also arranged at one axial end, and the air outlet is arranged in the circumference. The embodiment of the present utility model does not make any improvements on this.

[0048] The upper shell 21 is buckled onto the lower shell 23, and the inner shell 22 is located between the upper shell 21 and the lower shell 23. An air inlet duct 15 and an air outlet duct 16 separated from each other are provided between the upper shell 21 and the lower shell 23. The air outlet duct 16 is connected to the air outlet 33. There is a gap between the inner bottom surface of the upper shell 21 and the top surface of the inner shell 22 to form an air inlet cavity 18. The air inlet duct 15, the air inlet cavity 18 and the air inlet 32 are connected in sequence; the air inlet duct 15 is provided with an inner air suction port 11 and an outer air suction port 13; the air outlet duct 16 is provided with an inner air blowing port 12 and an outer air blowing port 14.

[0049] The valve assembly is configured to open the inner air intake 11 and the outer air blowing vent 14 while closing the outer air intake vent 13 and the inner air blowing vent 12 and to open the outer air intake vent 13 and the inner air blowing vent 12 while closing the inner air intake vent 11 and the outer air blowing vent 14.

[0050] The breathing air device of the utility model allows the driver or the passenger to adjust the blowing or suction of air according to personal preference, thereby realizing a personalized seat environment.

[0051] When in use, the passenger can use the valve assembly to change the on / off state of the inner air blowing port 12, the outer air blowing port 14 and the air outlet 33, as well as the on / off state of the inner air suction port 11, the outer air suction port 13 and the air inlet cavity 18, thereby blowing or sucking air into the car seat ventilation system.

[0052] More specifically, when the passenger wants to turn on the suction mode, the valve assembly is controlled to open the inner suction port 11 and the outer blowing port 14 while closing the outer suction port 13 and the inner blowing port 12. When the passenger wants to turn on the blowing mode, the valve assembly is controlled to open the outer suction port 13 and the inner blowing port 12 while closing the inner suction port 11 and the outer blowing port 14.

[0053] The embodiment of the present invention is provided with an air inlet cavity 18, such as Figure 10 and Figure 2 As shown, the cross-sectional area of the air inlet cavity 18 is larger than the air inlet 32, which is equivalent to optimizing the air inlet flow path. Under the same power, this helps to increase the air intake efficiency, thereby improving the blowing or suction effect. In addition, because the cross-sectional area of the air inlet cavity 18 is sufficiently large, the thickness of the air inlet cavity 18 can be reduced, thereby reducing the thickness of the entire device.

[0054] In addition, in some examples known to the inventor of the present application, blowing and sucking air toward the seat ventilation system are achieved by rotating the fan 31 forward and reverse. However, this will result in low ventilation efficiency. The inventor of the present application analyzed that this is because the fan blades are convex, concave and twisted. Simply changing the rotation direction by rotating the fan 31 forward and reverse is not optimal aerodynamics. Therefore, it will lead to low ventilation efficiency. The present application does not have the above problems or defects.

[0055] In some embodiments, one end of the air inlet duct 15 is connected to the air inlet cavity 18, the other end is the inner air inlet 11, and the outer air inlet 13 is arranged on the side of the air inlet duct 15; one end of the air outlet duct 16 is connected to the air outlet 33, the other end is the inner air outlet 12, and the outer air outlet 14 is arranged on the side of the air outlet duct 16; the valve assembly includes a driving device, a first baffle 42 and a second baffle 41, the first baffle 42 can be rotatably arranged in the air inlet duct 15, and the driving device can drive the first baffle 42 to rotate to block the outer The driving device can also drive the first baffle 42 to rotate to block the inner air intake 11 and connect the outer air intake 13 to the air inlet 32; the second baffle 41 can be rotatably arranged in the air outlet duct 16, and the driving device can drive the second baffle 41 to rotate to block the outer air outlet 14 and connect the inner air outlet 12 to the air outlet 33; the driving device can also drive the second baffle 41 to rotate to block the inner air intake 11 and connect the outer air intake 13 to the air inlet 32.

[0056] The “blocking” in this embodiment may be understood as blocking relative to the accommodating cavity, that is, cutting off the communication with the accommodating cavity so that certain structures are not connected to the accommodating cavity.

[0057] This embodiment can block or open the air outlets in the same air duct by driving the first baffle 42 to rotate through a driving device. It can be understood that the first baffle 42 has two states, namely, blocking the external air inlet 13 or blocking the internal air inlet 11. When the first baffle 42 is in the state of blocking the external air inlet 13, the internal air inlet 11 is in the open state. Similarly, when the first baffle 42 is in the state of blocking the internal air inlet 11, the external air inlet 13 is in the open state. This embodiment achieves the purpose of controlling the two air outlet states by only providing a single valve (i.e., the first baffle 42 or the second baffle 41), saving the number of components and the volume of the entire machine.

[0058] In some embodiments, the driving device includes a motor 43, a driving gear 44 and a driven gear 45. A first rotating shaft 46 is constructed at one end of the first baffle 42, and the first rotating shaft 46 can be rotatably set in the air inlet duct 15. One end of the first rotating shaft 46 is connected to the motor shaft of the motor 43, and the other end is fixedly provided with the driving gear 44. A second rotating shaft 47 is constructed at one end of the second baffle 41, and the second rotating shaft 47 can be rotatably set in the air outlet duct 16. A driven gear 45 is fixedly provided at one end of the second rotating shaft 47, and the driven gear 45 and the driving gear 44 are engaged for transmission.

[0059] In this embodiment, only one motor 43 is provided to realize the control of the two baffles, further reducing the number of components and the volume of the entire machine.

[0060] In some embodiments, a grille structure is fixedly provided at the external air intake port 13 and the external air outlet 14 .

[0061] This embodiment can prevent large foreign objects from entering the device.

[0062] In some embodiments, the air inlet duct 15 and the air outlet duct 16 are both ducts with rectangular cross-sections.

[0063] In some embodiments, the inner shell 22, the upper shell 21 and the lower shell 23 can be connected by any kind of snap-fit structure. For example, in the embodiment of the present invention, Figures 12-13 The shown latching protrusion 51 and the latching frame 52 are latched together. Specifically, the latching frame 52 is fixedly connected to the lower shell 23. The latching protrusion 51 is fixedly provided on the inner shell 22 and the upper shell 21. The latching protrusion 51 is matched with the latching frame 52 for use. The latching protrusion 51 is placed at the opening of the latching frame 52. Pressing the inner shell 22 or the upper shell 21 drives the latching protrusion 51 to move into the latching frame 52. The latching frame 52 will be slightly deformed during the movement. After being latched in place, the latching frame 52 returns to its original state.

[0064] In some embodiments, the bottom surfaces of the air inlet duct 15 and the air outlet duct 16 are respectively provided with a first connecting surface 34 and a second connecting surface 35 extending from one end to the other end in the width direction. The width direction of the bottom surfaces of the air outlet duct 16 and the air inlet duct 15 is perpendicular to the direction of the air flow within themselves. When the first baffle 42 is rotated to a state where the inner air intake port 11 is closed, the first baffle 42 is tilted and the bottom surface of the first baffle 42 is in contact with the first connecting surface 34; when the second baffle 41 is rotated to a state where the inner air blowing port 12 is closed, the second baffle 41 is tilted and the bottom surface of the second baffle 41 is in contact with the second connecting surface 35.

[0065] In this embodiment, surface contact between the baffle and the bottom surface of the air duct is achieved, thereby enhancing its stability and sealing performance.

[0066] In order to further increase the contact area, extended connecting surfaces 36 are provided on the front and rear inner walls of the air duct. The extended connecting surface 36 in the first air duct and the first connecting surface 34 are both on the same slope, and the extended connecting surface 36 in the second air duct and the second connecting surface 35 are both on the same slope.

[0067] In some embodiments, the first connecting surface 34 and the second connecting surface 35 are formed in grooves 38 opened on the bottom surfaces of the air inlet duct 15 and the air outlet duct 16 .

[0068] This embodiment can avoid the defect that the first connecting surface 34 and the second connecting surface 35 protrude from the bottom surface of the air duct and affect the flow of air when blowing or sucking air toward the inside.

[0069] In some embodiments, such as Figure 11 As shown, the other surface of the groove 38 is the third connecting surface 37, and the third connecting surface 37 is an arc surface, which takes the axis of the first rotating shaft 46 or the second rotating shaft 47 as the axis center. The third connecting surface 37 is used to cooperate with the end surface of the first baffle 42 or the second baffle 41, that is, the end surface of the first baffle 42 or the second baffle 41 is also an arc surface. When the end of the first baffle 42 or the second baffle 41 rotates into the groove 38, the end surface of the first baffle 42 or the second baffle 41 is fitted with the third connecting surface 37, and the size of the end surface of the first baffle 42 or the second baffle 41 is consistent with the size of the third connecting surface 37.

[0070] In some embodiments, the cross-sectional dimension of the air inlet duct 15 is greater than the cross-sectional dimension of the air outlet duct 16 .

[0071] In some embodiments, there is some space between the inner shell 22 and the side walls of the lower shell 23 and the upper shell 21 to form a peripheral air inlet channel 17, which is connected to the air inlet cavity 18 at the top of the inner shell 22 and the air inlet channel 15. Figure 3As shown, this further optimizes the space or flow channel at the air inlet 32 to facilitate the entry of surrounding air into the air inlet 32, and this helps to further reduce the gap between the top surface of the inner shell and the inner wall of the upper shell, thereby further reducing the thickness or height of the device, which contributes to the miniaturization design of the device.

[0072] Specific implementation methods:

[0073] like Figure 7 As shown, in suction mode, the control motor 43 rotates clockwise, driving the first baffle 42 and driving gear 44 in the air inlet duct 15 to rotate clockwise, opening the inner suction port 11 and closing the outer suction port 13. The driving gear 44 drives the driven gear 45 and the second baffle 41 in the air outlet duct 16 to rotate counterclockwise, opening the outer air outlet 14 and closing the inner air outlet 12. Air is drawn in through the inner suction port 11 and flows into the accommodating cavity. After being accelerated by the fan blades, it is discharged from the fan blade outlet 33 and flows to the outer air outlet 14, thus achieving seat suction.

[0074] like Figure 8 As shown, in blowing mode, the control motor 43 rotates counterclockwise, driving the first baffle 42 and driving gear 44 in the air inlet duct 15 to rotate counterclockwise, opening the outer air intake 13 and closing the inner air intake 11. The driving gear 44 drives the driven gear 45 and the second baffle 41 in the air outlet duct 16 to deflect clockwise, opening the inner air outlet 12 and closing the outer air outlet 14. Air is drawn in through the outer air intake 13 and flows into the accommodating cavity. After being accelerated by the fan blades, it is discharged from the fan blade outlet 33 and flows to the inner air outlet 12, thus blowing air to the seat.

[0075] In addition to the above embodiments, four electrically controlled valves can be separately set at the four air outlets, and then the operation of the four electrically controlled valves can be controlled by the control logic input into the controller to control the opening and closing of the corresponding air outlets. Compared with the above embodiments, this embodiment requires more components and occupies a large volume, which is not conducive to the miniaturization design of the device.

[0076] The utility model also provides a vehicle-type seat, comprising the breathing air device for the vehicle-type seat as described in the above embodiment.

[0077] The embodiment of the present utility model has all the advantages of the above embodiments, which will not be described in detail here.

[0078] The utility model also provides a car, comprising a plurality of car-type seats as described in the above embodiment.

[0079] The embodiment of the present utility model has all the advantages of the above embodiments, which will not be described in detail here.

[0080] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A breathing air device for a vehicle seat, characterized in that: include: A fan, wherein the fan is a centrifugal fan, used to provide power for air flow; lower shell; An inner shell, the inner shell is buckled on the inner side of the lower shell, and an accommodating cavity is enclosed between the inner shell and the lower shell. The fan is disposed in the accommodating cavity, and the accommodating cavity is provided with an air outlet and an air inlet. The air outlet is arranged in the circumference of the fan, and the air inlet is arranged on the inner shell at one axial end of the fan; An upper shell, the upper shell is buckled on the lower shell, the inner shell is located between the upper shell and the lower shell, an air inlet duct and an air outlet duct separated from each other are provided between the upper shell and the lower shell, the air outlet duct is connected to the air outlet, an air inlet cavity is formed between the inner bottom surface of the upper shell and the top surface of the inner shell, the air inlet duct, the air inlet cavity and the air inlet are connected in sequence; an inner air suction port and an outer air suction port are provided on the air inlet duct; an inner air blowing port and an outer air blowing port are provided on the air outlet duct; as well as The valve assembly is configured to open the inner air intake port and the outer air outlet while closing the outer air intake port and the inner air outlet, and to open the outer air intake port and the inner air outlet while closing the inner air intake port and the outer air outlet.

2. The breathing air device for a vehicle seat according to claim 1, characterized in that: The vent is configured to connect the first and second air intake ducts, and the vent is configured to connect the second and second air intake ducts, and the vent is configured to connect the second and second air intake ducts.

3. The breathing air device for a vehicle seat according to claim 2, characterized in that: The driving device includes a motor, a driving gear and a driven gear. A first rotating shaft is constructed at one end of the first baffle, and the first rotating shaft is rotatably arranged in the air inlet duct. One end of the first rotating shaft is transmission-connected to the motor shaft of the motor, and the other end is fixedly provided with the driving gear. A second rotating shaft is constructed at one end of the second baffle, and the second rotating shaft is rotatably arranged in the air outlet duct. The driven gear is fixedly provided at one end of the second rotating shaft, and the driven gear and the driving gear are meshed for transmission.

4. The breathing air device for a vehicle seat according to claim 1, characterized in that: A grille structure is fixedly provided at the external air suction port and the external air blowing port.

5. The breathing air device for a vehicle seat according to claim 3, characterized in that: The air inlet duct and the air outlet duct are both ducts with rectangular cross-sections.

6. The breathing air device for a vehicle seat according to claim 5, characterized in that: The bottom surfaces of the air inlet duct and the air outlet duct are respectively provided with a first connecting surface and a second connecting surface extending from one end to the other end in the width direction. The width directions of the bottom surfaces of the air outlet duct and the air inlet duct are perpendicular to the direction of the air flow within themselves. When the first baffle is rotated to a state where the inner air intake port is closed, the first baffle is tilted and the bottom surface of the first baffle is in contact with the first connecting surface; when the second baffle is rotated to a state where the inner air blowing port is closed, the second baffle is tilted and the bottom surface of the second baffle is in contact with the second connecting surface.

7. The breathing air device for a vehicle seat according to claim 6, characterized in that: The first connecting surface and the second connecting surface are formed in grooves opened on the bottom surfaces of the air inlet duct and the air outlet duct.

8. The breathing air device for a vehicle seat according to claim 1, characterized in that: The cross-sectional size of the air inlet duct is greater than the cross-sectional size of the air outlet duct.

9. A vehicle-type seat, characterized in that: A breathing air device for a vehicle seat comprising the breathing air device according to any one of claims 1 to 8.

10. An automobile, characterized in that: The invention comprises several vehicle-type seats as claimed in claim 9.

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