Ventilation device of automobile seat leg support and automobile seat

Abstract

The utility model relates to a ventilation device of an automobile seat leg support and an automobile seat, the front end of the automobile seat is provided with an angle-adjustable leg supporting structure used for supporting the shank of a human body, the ventilation device is arranged on the leg supporting structure, and the ventilation device comprises a fan and an air guide structure communicated with the fan; the number of the fans is at least one, the fans are installed on the side, away from a passenger, of the leg support, and the fans are configured to conduct air flow exchange with the air guide structure; the air guide structure is configured to be an air path transmission channel; when the fan is in a working state, the fan and the air guide structure continuously exchange air flow so as to accelerate the flow speed of air on the side, close to the human body, of the leg supporting structure, and therefore ventilation of the leg supporting structure is achieved.

Description

Technical Field

[0001] This application relates to the technical field of seat ventilation, and in particular to a ventilation device for a leg rest of an automotive seat and an automotive seat. Background Art

[0002] With the continuous development of automotive technology, people's requirements for the comfort of vehicle seats are getting higher and higher. Especially for high-end luxury models, most of them require the passenger seats to be equipped with an adjustable leg rest structure to provide support for the legs and improve the comfort of passengers.

[0003] In recent years, a comfort system using a seat air conditioning and ventilation device has gradually been recognized by the market as a high-end application of vehicle comfort technology. By directly blowing or sucking air into the ventilation circuit inside the seat through a fan power module inside the vehicle body, its active seat cooling or heating and ventilation can bring a more direct and rapid driving and riding comfort to the occupants.

[0004] Taking a traditional suction-type ventilation seat as an example, the air in the environment enters the suction fan through multiple ventilation holes in the seat foam. Driven by the rotation of the suction fan impeller, the gas is discharged through the exhaust port to achieve the air exchange on the occupant side seat surface, so as to facilitate the sweating of the occupant's body and keep the occupant's body fresh. However, it often happens that most leg rests of the seats are not independently equipped with a ventilation system, which results in poor air exchange effect in the leg and foot areas of the occupant. In actual use, the vehicle air conditioning system is usually used to cool the cabin to improve the ventilation experience in the leg and foot areas of the occupant, but such a method will bring higher energy consumption and serious energy loss. Summary of the Utility Model

[0005] In order to solve some or all of the above technical problems, this application provides a ventilation device for a leg rest of an automotive seat and an automotive seat.

[0006] According to a first aspect of the present utility model, there is provided a ventilation device for a leg rest of an automotive seat. The front end of the automotive seat has a leg support structure with an adjustable angle for supporting the lower leg of a human body. A ventilation device is provided on the leg support structure. The ventilation device includes: a fan and a wind guiding structure communicated with the fan. Among them, at least one group of fans is provided, and the fans are installed on the side of the leg rest away from the occupant. The fans are configured to perform air flow exchange with the wind guiding structure; the wind guiding structure is configured as an air path transmission channel; when the fans are in an operating state, continuous air flow exchange is carried out between the fans and the wind guiding structure to accelerate the air flow velocity on the side of the leg support structure close to the human body, so as to achieve ventilation of the leg support structure.

[0007] Further, when the air outlet of the blower is in communication with the air guiding structure, the air blown out by the blower enters the air guiding structure and then is blown onto the surface of the leg rest through the air guiding structure, realizing ventilation in the form of blowing air in the main support area of the leg rest; when the air inlet of the blower is in communication with the air guiding structure, the air is sucked into the blower from the surface of the leg rest through the air guiding structure and then discharged outward by the blower, realizing ventilation in the form of sucking air in the main support area of the leg rest.

[0008] Further, the air guiding structure includes an air guiding part and a plurality of air flow channels, and the air flow channels are opened on the leg rest foam; the air guiding part is arranged on one side of the blower close to the leg rest foam and is in communication with the blower and the air flow channels.

[0009] Further, the air guiding part can be configured as an air bag, the air bag includes a sealing layer and a air distribution layer, a plurality of holes leading to the air flow channels are opened on the air distribution layer, and a air guiding spacer pressure-bearing filler is further arranged in the air bag; when the air outlet of the blower is in communication with the air guiding structure, the air blown out by the blower is blown onto the surface of the leg rest through the holes and the air flow channels, realizing ventilation in the form of blowing air in the main support area of the leg rest; when the air inlet of the blower is in communication with the air guiding structure, the air is sucked into the blower from the surface of the leg rest through the air flow channels and the holes and then discharged outward by the blower, realizing ventilation in the form of sucking air in the main support area of the leg rest.

[0010] Further, a forward ventilation part is connected and arranged at the front end of the air guiding part, and a forward ventilation opening corresponding to the forward ventilation part is arranged at the front end of the leg rest. A part of the air blown out by the blower is blown onto the surface of the leg rest through the air guiding part and the air flow channels, realizing ventilation in the main support area of the leg rest; another part of the air is blown to the front of the leg rest through the air guiding part, the forward ventilation part and the forward ventilation opening, realizing ventilation in the foot area of the occupant in front of the leg rest.

[0011] Further, the air guiding part can be configured as an air bag, the air bag includes a sealing layer and a air distribution layer, a plurality of holes leading to the air flow channels and a plurality of forward ventilation holes leading to the forward ventilation opening are opened on the air distribution layer, and a air guiding spacer pressure-bearing filler is further arranged in the air bag; the air blown out by the blower is gathered in the air bag. Among them, a part of the air is blown onto the surface of the leg rest through the holes and the air flow channels, realizing ventilation in the main support area of the leg rest; another part of the air is blown to the front of the leg rest through the forward ventilation holes and the forward ventilation opening, realizing ventilation in the foot area of the occupant in front of the leg rest.

[0012] Further, the air guiding part can be configured to include an air distribution part and a sealing part, the air distribution part includes a plurality of air guiding grooves, and the air flow channels are in communication with the air guiding grooves; the sealing part is configured to make the air flow concentratedly to the air distribution part;

[0013] When the air outlet of the blower is in communication with the air guiding structure, the air blown out by the blower blows towards the surface of the leg rest through the air guiding grooves and the air flow channels, realizing ventilation in the form of blowing air to the main supporting area of the leg rest; when the air inlet of the blower is in communication with the air guiding structure, air is sucked from the surface of the leg rest into the blower through the air flow channels and the air guiding grooves, and then discharged by the blower, realizing ventilation in the form of sucking air from the main supporting area of the leg rest.

[0014] Further, the air guiding part includes an air guiding layer provided on the side of the leg rest foam away from the blower, and the blower is in communication with the air guiding layer; the air blown out by the blower converges to the air guiding layer and then blows towards the surface of the leg rest through the air guiding layer, realizing ventilation in the form of blowing air to the main supporting area of the leg rest.

[0015] Further, a wind guiding grille is correspondingly provided at the forward ventilation opening, and the wind guiding grille is configured to guide the air discharged to the forward ventilation opening to blow towards the foot area of the occupant.

[0016] According to the second aspect of the present invention, there is provided an automotive seat, which includes the ventilation device as described in the first aspect of the present invention.

[0017] It can be seen from the above technical solutions that in the ventilation device described in the first aspect of the present invention and the automotive seat described in the second aspect of the present invention, when the blower is in the working state, continuous air flow exchange occurs between the blower and the air guiding structure to accelerate the air flow velocity on the side of the leg support structure close to the human body, thereby realizing ventilation of the leg support structure.

[0018] In addition, the ventilation device of the present invention also has the advantages of simple structure, easy assembly, safe and reliable use, and is convenient for implementation, popularization and application. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 is a schematic structural diagram of the ventilation device according to an embodiment of the present invention;

[0021] Figure 2 is a schematic cross-sectional view showing the leg rest ventilation device;

[0022] Figure 3 is clearly shown Figure 2 an enlarged schematic view of the leg rest ventilation device in

[0023] Figure 4 It is a cross-sectional view of the leg rest ventilation device in the air suction state of the fan.

[0024] Figure 5 It shows Figure 4 an enlarged schematic view of the leg rest ventilation device in

[0025] Figure 6 It is a schematic cross-sectional view of the leg rest ventilation device when the leg rest is in the open state.

[0026] Figure 7 It clearly shows Figure 6 an enlarged schematic view of the leg rest ventilation device in

[0027] Figure 8 It is a schematic structural view showing another form of the air guiding part.

[0028] Figure 9 It is an exploded schematic view of the leg rest ventilation device.

[0029] Explanation of reference numerals: 1. Fan; 2. Air guiding structure; 21. Air guiding part; 211. Air distribution part; 212. Sealing part; 22. Air flow channel; 23. Adapter pipe; 24. Air guiding groove; 3. Leg rest; 4. Leg rest support plate; 41. Air guiding layer; 5. Leg rest foam; 6. Forward ventilation part; 7. Forward ventilation opening; 8. Air bag; 81. Sealing layer; 811. Hole; 812. Forward ventilation hole; 82. Air distribution layer; 9. Air guiding grille; 91. Air guiding blade; 10. Seat cushion; 11. Backrest. Detailed implementation mode

[0030] The following further elaborates on this application in combination with the attached Figures 1-9 drawings. Embodiment

[0031] As mentioned in the background art, in view of the problems in the prior art, this application proposes a ventilation device for the leg rest of an automobile seat.

[0032] The front end of the automobile seat has an angle-adjustable leg support structure for supporting the lower legs of a human body, and a ventilation device is provided on the leg support structure. The ventilation device includes:

[0033] a fan 1 and an air guiding structure 2 communicatively connected to the fan 1,

[0034] At least one group of the fans 1 is provided, and the fans 1 are installed on the side of the leg rest 3 away from the occupant. The fans 1 are configured to perform air flow exchange with the air guiding structure 2; the air guiding structure 2 is configured as an air path transmission channel.

[0035] When the fan 1 is in the working state, continuous air flow exchange occurs between the fan 1 and the air guiding structure 2 to accelerate the air flow velocity on the side of the leg support structure close to the human body, thereby realizing ventilation of the leg support structure.

[0036] In a preferred embodiment, for the fan 1 configured to perform air flow exchange with the air guiding structure 2, the fan 1 can be a centrifugal fan, an axial flow fan, or an integrated fan with both blowing and sucking functions according to actual design needs. At the same time, to adapt to the space structure of the leg rest 3 itself, the selection of the fan 1 should focus on thin fans; in addition, the installation method of the fan 1 is a conventional technical means in the art, which can be that the fan 1 is assembled and fixed to the seat frame, or the fan 1 is embedded in the foam, but is not limited to the above embodiments.

[0037] In a preferred embodiment, for different selections of the fan 1, taking the axial flow fan as an example, when the air outlet of the fan 1 is communicated with the air guiding structure 2, the air blown out by the fan 1 enters the air guiding structure 2 and then blows towards the surface of the leg rest 3 through the air guiding structure 2, realizing ventilation in the form of blowing in the main support area of the leg rest 3; taking the centrifugal fan as an example, when the air inlet of the fan 1 is communicated with the air guiding structure 2, the air is sucked into the fan 1 from the surface of the leg rest 3 through the air guiding structure 2 and then discharged outward by the fan 1, realizing ventilation in the form of sucking in the main support area of the leg rest 3.

[0038] In a preferred embodiment, a transition pipe 23 is further arranged between the fan 1 and the air guiding structure 2. One end of the transition pipe 23 is communicated with the fan 1, and the other end is communicated with the air guiding structure 2.

[0039] In a preferred embodiment, the air guiding structure 2 includes a wind guiding part 21 and a plurality of air flow channels 22. Specifically,

[0040] A plurality of the air flow channels 22 are opened on the leg rest foam 5 above the leg rest support plate 4; the wind guiding part 21 is arranged on the side of the fan close to the leg rest foam 5 and is communicated with the fan 1 and the air flow channels 22;

[0041] When the air outlet of the fan 1 is communicated with the air guiding structure 2, the air blown out by the fan 1 enters the wind guiding part 21 and then blows towards the surface of the leg rest 3 through the part 21, realizing ventilation in the form of blowing in the main support area of the leg rest 3; when the air inlet of the fan 1 is communicated with the air guiding structure 2, the air is sucked into the fan 1 from the surface of the leg rest 3 through the air flow channels 22 and the wind guiding part 21 and then discharged outward by the fan 1, realizing ventilation in the form of sucking in the main support area of the leg rest 3; it should also be noted that for the ventilation device in this embodiment, whether the leg rest 3 is in the open state (used by the occupant) or the retracted state, it will not affect the ventilation effect of the ventilation device.

[0042] In a preferred embodiment, a forward ventilation part 6 is communicatively connected to the front end of the air guide part 21, and a forward ventilation opening 7 corresponding to the forward ventilation part 6 is provided at the front end of the leg rest 3. A part of the air blown out by the blower 1 passes through the air guide part 21 and the air flow channel 22 and blows towards the surface of the leg rest 3, realizing ventilation in the form of blowing air on the main support area of the leg rest 3; another part passes through the air guide part 21, the forward ventilation part 6, and the forward ventilation opening 7 and blows towards the front of the leg rest 3, realizing ventilation in the form of blowing air on the foot area of the occupant in front of the leg rest 3.

[0043] More specifically, when the leg rest 3 supports the occupant's legs, a part of the air can be blown out from the forward ventilation part 6 and the forward ventilation opening 7 towards the direction close to the occupant's feet, so that the leg rest ventilation device has the function of blowing air on the feet while having the function of blowing air on the legs, thereby bringing a better ventilation comfort to the occupant; in addition, by adding the forward ventilation opening 7 at the front end of the leg rest 3, the total air resistance during the blowing of the blower 1 can also be reduced, and the operating efficiency of the blower 1 can be improved.

[0044] In a preferred embodiment, the air guide part 21 can be configured as an air bag 8. The air bag 8 includes a sealing layer 81 and a air distribution layer 82. A plurality of holes 811 leading to the air flow channel 22 are formed in the air distribution layer 82. The sealing layer 81 is configured to make the air flow concentratedly towards the air distribution layer 82. A wind guiding interval pressure-bearing filler is further arranged in the air bag 8, and the wind guiding interval pressure-bearing filler can play a certain supporting role for the air bag 8 to prevent the air bag 8 from being squeezed and affecting the ventilation effect; wherein, the sealing layer 81 can be a PU film, a TPU film or a polyester material film, but is not limited thereto; the air distribution layer 82 can be a PU film, a TPU film, a polyester material film or a breathable non-woven fabric, but is not limited thereto.

[0045] When the air outlet of the blower 1 is communicated with the air guide structure 2, the air blown out by the blower 1 passes through the holes 811 and the air flow channel 22 and blows towards the surface of the leg rest 3, realizing ventilation in the form of blowing air on the main support area of the leg rest 3; when the air inlet of the blower 1 is communicated with the air guide structure 2, the air is inhaled from the surface of the leg rest 3 into the blower 1 through the air flow channel 22 and the holes 811, and then discharged outward by the blower 1, realizing ventilation in the form of sucking air on the main support area of the leg rest 3.

[0046] In a preferred embodiment, the air guiding part 21 can be configured as an air bag 8, the air bag 8 includes a sealing layer 81 and a air distribution layer 82, a plurality of holes 811 leading to the air flow channels 22 and a plurality of forward ventilation holes 812 leading to the forward ventilation openings 7 are formed on the air distribution layer 82, and an air guiding spacer pressure-bearing filler is further arranged in the air bag 8. Among them, the selection of the materials of the sealing layer 81 and the air distribution layer 82 is as listed in the above embodiments;

[0047] When the air outlet of the blower 1 is communicated with the air guiding structure 2, the air blown out by the blower 1 is gathered to the air bag 8. Among them, a part of the air is blown to the surface of the leg rest 3 through the holes 811 and the air flow channels 22, realizing ventilation in the form of blowing air to the main supporting area of the leg rest 3; another part of the air is blown to the front of the leg rest 3 through the forward ventilation holes 812 and the forward ventilation openings 7, realizing ventilation in the form of blowing air to the foot area of the occupant in front of the leg rest 3;

[0048] When the air inlet of the blower 1 is communicated with the air guiding structure 2, a part of the air is sucked into the blower 1 from the surface of the leg rest 3 through the air flow channels 22 and the holes 811; and a part of the air is sucked into the blower 1 from the front end of the leg rest 3 through the forward ventilation openings 7 and the forward ventilation holes 812, and then discharged outwards by the blower 1.

[0049] In a preferred embodiment, the air guiding part 21 can be configured to include an air distribution part 211 and a sealing part 212. The air distribution part 211 includes a plurality of air guiding grooves 24, and the air flow channels 22 are communicated with the air guiding grooves 24; the sealing part 212 is configured to make the air flow concentratedly to the air distribution part 211;

[0050] When the air outlet of the blower 1 is communicated with the air guiding structure 2, the air blown out by the blower 1 is blown to the surface of the leg rest 3 through the air guiding grooves 24 and the air flow channels 22, realizing ventilation in the form of blowing air to the main supporting area of the leg rest 3; when the air inlet of the blower 1 is communicated with the air guiding structure 2, the air is sucked into the blower 1 from the surface of the leg rest 3 through the air flow channels 22 and the air guiding grooves 24, and then discharged by the blower 1, realizing ventilation in the form of sucking air from the main supporting area of the leg rest 3.

[0051] In a preferred embodiment, the air guiding groove 24 can be configured as follows: the air guiding groove 24 extends to be communicated with the forward ventilation opening 7. The air blown out by the blower 1, a part of which is blown to the surface of the leg rest 3 through the air guiding groove 24 and the air flow channels 22, realizing ventilation in the form of blowing air to the main supporting area of the leg rest 3; another part of which is blown to the front of the leg rest 3 through the air guiding groove 24 and the forward ventilation opening 7, realizing ventilation in the form of blowing air to the foot area of the occupant in front of the leg rest 3.

[0052] In a preferred embodiment, the air guiding part 21 includes an air guiding layer 41 disposed on the side of the leg rest foam 5 away from the blower 1. The blower 1 is in communication with the air guiding layer 41. The air guiding layer 41 is made of, but not limited to, three-dimensional knitted mesh material. The air blown out by the blower 1 converges to the air guiding layer 41 and then blows towards the surface of the leg rest 3 through the air guiding layer 41, realizing ventilation in the form of blowing air to the main support area of the leg rest 3.

[0053] In a preferred embodiment, a wind deflector grille 9 is correspondingly arranged at the forward ventilation opening 7. The wind deflector grille 9 is configured to guide the air discharged to the forward ventilation opening 7 to blow towards the foot area of the occupant. The assembly manner between the wind deflector grille 9 and the forward ventilation opening 7 can be plug-in connection, snap connection or connection by fasteners.

[0054] In a preferred embodiment, the wind deflector grille 9 includes a plurality of wind guiding vanes 91. The wind guiding vanes 91 are inclined in the wind deflector grille 9 to guide the air to blow more concentratedly towards the foot area of the occupant. Among them, the connection relationship between the wind guiding vanes 91 and the wind deflector grille 9 can be plug-in connection, snap connection or connection by fasteners, or the wind guiding vanes 91 and the wind deflector grille 9 are integrally formed. Embodiment

[0055] On the basis of Embodiment 1, further, the present application provides an automotive seat, which includes a seat cushion 10, a backrest 11, a leg rest 3 and the ventilation device involved in the above embodiment. Through the ventilation device, ventilation of the main support area of the leg rest and the foot area of the occupant in front of the leg rest can be realized.

[0056] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "vertical" and "horizontal" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0057] In addition, terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0058] In this application, unless otherwise clearly stipulated and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model, and they should all be covered within the scope of the claims and the description of the present utility model. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A ventilation device for a leg support of a car seat, wherein the front end of the car seat has a leg support structure with an adjustable angle for supporting the calf of a human body, and a ventilation device is arranged on the leg support structure, characterized in that: The ventilation device comprises: A fan (1) and an air guide structure (2) connected to the fan (1), wherein: At least one group of the fans (1) is provided, and the fans (1) are installed on the side of the leg support (3) away from the occupant, and the fans (1) are configured to exchange airflow with the air guide structure (2); the air guide structure (2) is configured as an air transmission channel; When the fan (1) is in operation, airflow is continuously exchanged between the fan (1) and the air guide structure (2), thereby achieving ventilation of the leg support structure.

2. The ventilation device according to claim 1, characterized in that: When the air outlet of the fan (1) is connected to the air guide structure (2), the air blown out by the fan (1) enters the air guide structure (2), and then blows toward the surface of the leg rest (3) through the air guide structure (2), thereby achieving ventilation in the form of blowing air in the main support area of ​​the leg rest (3); When the air inlet of the fan (1) is connected to the air guide structure (2), air is sucked into the fan (1) from the surface of the leg rest (3) through the air guide structure (2), and then discharged outwardly by the fan (1), thereby realizing ventilation in the form of suction in the main supporting area of ​​the leg rest (3).

3. The ventilation device according to claim 2, characterized in that: The air guide structure (2) comprises an air guide portion (21) and a plurality of air flow channels (22). The air flow channel (22) is formed on the leg support foam (5) of the leg support (3); the air guide portion (21) is disposed on a side of the fan (1) close to the leg support foam (5), and is connected to the fan (1) and the air flow channel (22).

4. The ventilation device according to claim 3, characterized in that: The air guide portion (21) may be configured as an air bag (8), the air bag (8) comprising a sealing layer (81) and an air distribution layer (82), the air distribution layer (82) being provided with a plurality of holes (811) leading to the air flow channel (22), and an air guide interval pressure-bearing filler being further provided in the air bag (8); When the air outlet of the fan (1) is connected to the air guide structure (2), the air blown out by the fan (1) is blown toward the surface of the leg rest (3) through the hole (811) and the air flow channel (22), thereby realizing ventilation in the form of blowing in the main supporting area of ​​the leg rest (3); when the air inlet of the fan (1) is connected to the air guide structure (2), the air is sucked into the fan (1) from the surface of the leg rest (3) through the air flow channel (22) and the hole (811), and then discharged outwardly by the fan (1), thereby realizing ventilation in the form of sucking in the main supporting area of ​​the leg rest (3).

5. The ventilation device according to claim 3, characterized in that: The front end of the air guide portion (21) is connected to a forward ventilation portion (6), and the front end of the leg rest (3) is provided with a forward ventilation port (7) corresponding to the forward ventilation portion (6). A portion of the air blown out by the fan (1) is blown toward the surface of the leg rest (3) through the air guide portion (21) and the air flow channel (22), thereby realizing ventilation of the main supporting area of ​​the leg rest (3); and the other portion of the air is blown toward the front of the leg rest (3) through the air guide portion (21), the forward ventilation portion (6) and the forward ventilation port (7), thereby realizing ventilation of the occupant's foot area in front of the leg rest (3).

6. The ventilation device according to claim 5, characterized in that: The air guide portion (21) can be configured as an air bag (8), the air bag (8) comprising a sealing layer (81) and an air distribution layer (82), the air distribution layer (82) being provided with a plurality of holes (811) leading to the air flow channel (22) and a plurality of forward ventilation holes (812) leading to the forward ventilation port (7), and an air guide spacer pressure-bearing filler is also provided in the air bag (8); The air blown out by the fan (1) is collected in the air bag (8), wherein a part of the air is blown toward the surface of the leg rest (3) through the hole (811) and the air flow channel (22), thereby realizing ventilation of the main supporting area of ​​the leg rest (3); another part of the air is blown toward the front of the leg rest (3) through the forward ventilation hole (812) and the forward ventilation port (7), thereby realizing ventilation of the occupant's foot area in front of the leg rest (3).

7. The ventilation device according to claim 3, characterized in that: The air guide portion (21) may be configured to include an air distribution portion (211) and a sealing portion (212); the air distribution portion (211) includes a plurality of air guide grooves (24); the air flow channel (22) is connected to the air guide grooves (24); the sealing portion (212) is configured to allow air to flow toward the air distribution portion (211); When the air outlet of the fan (1) is connected to the air guide structure (2), the air blown out by the fan (1) is blown toward the surface of the leg rest (3) through the air guide groove (24) and the air flow channel (22), thereby realizing ventilation in the form of blowing in the main supporting area of ​​the leg rest (3); when the air inlet of the fan (1) is connected to the air guide structure (2), the air is sucked into the fan (1) from the surface of the leg rest (3) through the air flow channel (22) and the air guide groove (24), and then discharged by the fan (1), thereby realizing ventilation in the form of sucking in the main supporting area of ​​the leg rest (3).

8. The ventilation device according to claim 3, characterized in that: The air guiding portion (21) comprises an air guiding layer (41) arranged on a side of the leg support foam (5) away from the fan (1), and the fan (1) is connected to the air guiding layer (41); the air blown out by the fan (1) is collected in the air guiding layer (41), and then blown toward the surface of the leg support (3) through the air guiding layer (41), thereby realizing ventilation in the form of blowing in the main supporting area of ​​the leg support (3).

9. The ventilation device according to claim 5 or 6, characterized in that: An air guide grille (9) is correspondingly arranged at the forward vent (7), and the air guide grille (9) is configured to guide the air discharged to the forward vent (7) to blow toward the passenger's foot area.

10. A car seat, characterized in that: Comprising a ventilation device as described in any one of claims 1-9.

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