Seat leg support ventilation device and automobile seat
By designing a seat leg support ventilation device, the linked seat ventilation device realizes two forms of ventilation, air suction and blowing, which solves the problem of lack of independent ventilation of the seat leg support, improves ventilation effect and reduces energy consumption.
Patent Information
- Application Number
- CN202421750061.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The lack of independent ventilation systems for existing seat leg rests leads to poor air exchange in the occupant's legs and foot areas. It is usually necessary to improve the ventilation experience through the vehicle air conditioning system, but this will lead to higher energy consumption and energy losses.
A seat leg support ventilation device is designed, including a fan, air distribution part and a leg support air guide part. The linked seat ventilation device realizes two types of ventilation modes: air suction and blowing air to ensure sufficient ventilation on the surface of the leg support.
Independent ventilation in the leg support area is achieved, ventilation effect of the occupant's legs and foot area is improved, energy consumption of the vehicle's air conditioning system is reduced, and energy loss is reduced. At the same time, the secondary utilization of wind energy also plays a role in reducing energy consumption.
Smart Images
Figure CN223014425U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of seat ventilation, and particularly to a seat leg rest ventilation device 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 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 seat leg rests are not independently equipped with a ventilation system, which results in poor air exchange effect in the occupant's leg and foot areas. In actual use, the vehicle air conditioning system is usually used to cool the cabin to improve the ventilation experience in the occupant's leg and foot areas, but this 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, the present application provides a seat leg rest ventilation device and an automotive seat.
[0006] According to a first aspect of the present utility model, there is provided a seat leg rest ventilation device. The seat includes a main seat part and a leg rest part. A linked seat ventilation device is provided on the main seat part and the leg rest part, which includes a fan, a air distribution part, and a leg rest air guiding part. At least one group of fans is provided; a air guiding part is provided on the main seat part of the seat, and air is inhaled from the seat surface into the fan through the air guiding part and then blown out by the fan; the air distribution part is arranged between the fan and the leg rest air guiding part, one end of which is communicated with the air outlet of the fan, and the other end is communicated with the leg rest air guiding part; when the fan is in a working state, air is inhaled from the seat surface into the fan through the air guiding part and then blown out from the air outlet of the fan to achieve ventilation in the form of seat air suction; and the air blown out from the air outlet is blown to the leg rest surface through the air distribution part and the leg rest air guiding part to achieve ventilation in the form of leg rest air blowing.
[0007] Further, the air distribution part includes a pipeline assembly, and the pipeline assembly includes at least one telescopic part.
[0008] Further, the pipeline assembly includes a converging pipeline and a telescopic pipeline, where: the converging pipeline is communicated with the air outlet of the fan; one end of the telescopic pipeline is communicated with the end of the converging pipeline away from the fan, and the other end is communicated with the leg rest air guiding part; the air blown out through the air outlet passes through the converging pipeline and the telescopic pipeline and is blown to the leg rest air guiding part, and then is blown to the surface of the leg rest through the leg rest air guiding part, so as to realize the ventilation in the form of blowing air to the leg rest.
[0009] Further, the telescopic pipeline can be formed by the self-extension of the converging pipeline; or one end of the telescopic pipeline is inserted into the converging pipeline, and the other end is communicated with the leg rest air guiding part.
[0010] Further, the leg rest air guiding part includes a wind guiding structure and a plurality of exhaust duct holes, where: the exhaust duct holes are opened on the leg rest foam; the wind guiding structure is arranged on the side of the fan close to the leg rest foam and is communicated with the fan and the exhaust duct holes; the air blown out by the fan is blown to the exhaust duct holes through the wind guiding structure, and then is blown out from the exhaust duct holes to the surface of the leg rest, so as to realize the ventilation in the form of blowing air to the leg rest.
[0011] Further, the wind guiding structure can be configured as an air bag, the air bag includes a sealing layer and an air distribution layer, a plurality of holes leading to the exhaust duct holes are opened on the air distribution layer, and a wind guiding spacer pressure-bearing filler is further arranged in the air bag. The air blown out by the fan is gathered in the air bag and is blown out to the surface of the leg rest through the holes and the exhaust duct holes, so as to realize the ventilation in the form of blowing air to the leg rest.
[0012] Further, a plurality of forward ventilation holes are further opened on the air distribution layer, and a forward air outlet communicated with the forward ventilation holes is arranged at the front end of the leg rest; part of the air blown out by the fan is blown out to the surface of the leg rest through the holes and the exhaust duct holes to realize the ventilation of the leg rest; the other part is blown out to the front of the leg rest through the forward ventilation holes and the forward air outlet to realize the ventilation of the foot area of the occupant in front of the leg rest.
[0013] Further, the wind guiding structure can be configured to include an air guiding part and a sealing part. The air guiding part includes a plurality of air guiding grooves, and the exhaust duct holes are communicated with the air guiding grooves; the sealing part is configured to make the air flow concentratedly to the air guiding part; the air blown out by the fan is blown to the surface of the leg rest through the air guiding grooves and the exhaust duct holes, so as to realize the ventilation in the form of blowing air to the leg rest.
[0014] Furthermore, a forward air outlet is provided at the front end of the leg rest, and the air guiding groove extends to communicate with the forward air outlet. Part of the air blown out by the blower passes through the air guiding groove and the exhaust duct to be blown out onto the surface of the leg rest, realizing ventilation in the form of blowing air on the leg rest; another part passes through the air guiding groove and the forward air outlet to be blown out in front of the leg rest, realizing ventilation in the foot area of the occupant in front of the leg rest.
[0015] According to a second aspect of the present invention, there is provided an automotive seat, which includes the leg rest ventilation device as described in the first aspect of the present invention.
[0016] As can be seen from the above technical solutions, in the leg rest 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, air is sucked into the blower from the seat surface through the air guiding part, and then blown out from the air outlet of the blower, realizing ventilation in the form of sucking air by the seat; and the air blown out from the air outlet passes through the air distribution part and the leg rest air guiding part to be blown onto the surface of the leg rest, realizing ventilation in the form of blowing air on the leg rest, and at the same time, the secondary utilization of wind energy also reduces energy consumption.
[0017] In addition, the leg rest 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
[0018] 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 actual scale.
[0019] Figure 1 It is a schematic structural diagram of the leg rest ventilation device according to an embodiment of the present invention;
[0020] Figure 2 It is a schematic structural diagram of a seat showing leg rest ventilation;
[0021] Figure 3 It is a schematic cross-sectional diagram showing the leg rest ventilation device;
[0022] Figure 4 It clearly shows Figure 3 an enlarged schematic diagram of the leg rest ventilation device in
[0023] Figure 5 It is a schematic cross-sectional diagram showing the leg rest ventilation device in the open state;
[0024] Figure 6 It clearly shows Figure 5 an enlarged schematic diagram of the leg rest ventilation device in
[0025] Figure 7 It is a partial schematic view showing the leg rest ventilation device in a state where the universal telescopic pipeline is inserted into the junction pipeline;
[0026] Figure 8 It is a schematic structural view showing another form of the air guiding structure;
[0027] Figure 9 It is an exploded schematic view showing the leg rest ventilation device.
[0028] Explanation of reference numerals: 1, fan; 2, air distribution part; 21, junction pipeline; 211, air guiding part; 212, sealing part; 22, telescopic pipeline; 23, pipeline assembly; 24, telescopic part; 25, air guiding groove; 3, leg rest air guiding part; 31, air guiding structure; 32, exhaust duct; 33, leg rest support plate; 34, leg rest foam; 4, leg rest; 41, forward air outlet; 42, air guiding layer; 5, air guiding part; 6, adapter pipe; 7, air bag; 71, hole; 72, sealing layer; 73, forward ventilation hole; 75, air distribution layer; 8, air guiding grille; 81, air guiding blade; 9, fixing part; 10, seat cushion; 11, backrest. Detailed implementation mode
[0029] The following will further describe the present application in detail with reference to the Figures 1-9 accompanying drawings. Embodiment
[0030] As mentioned in the background art, in view of the problems in the prior art, the present application proposes a seat leg rest ventilation device, wherein the seat includes a main seat part and a leg rest part, and a linked seat ventilation device is provided on the main seat part and the leg rest part. The ventilation device includes:
[0031] a fan 1, an air distribution part 2 and a leg rest air guiding part 3,
[0032] At least one group of the fans 1 is provided; an air guiding part 5 is provided on the main seat part of the seat, and air is sucked into the fan 1 from the seat surface through the air guiding part 5 and then blown out by the fan 1;
[0033] The air distribution part 2 is arranged between the fan 1 and the leg rest air guiding part 3, one end of which is communicated with the air outlet of the fan 1, and the other end is communicated with the leg rest air guiding part 3;
[0034] When the fan 1 is in a working state, air is sucked into the fan 1 from the seat surface through the air guiding part 5 and then blown out from the air outlet of the fan 1, realizing the ventilation in the air suction form of the seat; and the air blown out from the air outlet passes through the air distribution part 2 and the leg rest air guiding part 3 and is blown to the surface of the leg rest 4, realizing the ventilation in the air blowing form of the leg rest 4. At the same time, the wind energy is reused, and the energy loss is also reduced.
[0035] In a preferred embodiment, the blower 1 can be disposed on the seat cushion 10 or on the backrest 11. That is, in this embodiment, the air source that guides the air to blow towards the leg or foot area of the occupant can be the air discharged from the blower 1 (also referred to as "waste air") when the seat cushion 10 sucks air for ventilation, or can be the air discharged from the blower 1 (also referred to as "waste air") when the backrest 11 sucks air for ventilation. In addition, the specific installation method of the blower 1 on the seat cushion 10 or the backrest 11 is a conventional technical means in the art. It can be that the blower 1 is assembled and fixed to the seat frame, or the blower 1 is embedded in the foam, but is not limited to the above embodiments.
[0036] In a preferred embodiment, the air distribution part 2 includes a pipeline assembly 23, and the pipeline assembly 23 includes at least one telescopic part 24. The telescopic part 24 is configured to: ensure that when the leg rest 4 is adjusted to a larger angle, it can still be connected to the blower 1, that is, the ventilation effect of the leg rest ventilation device will not be affected by the movement of the leg rest 4.
[0037] In a preferred embodiment, the pipeline assembly 23 includes a converging pipeline 21 and a telescopic pipeline 22, wherein:
[0038] The converging pipeline 21 is communicated with the air outlet of the blower 1; one end of the telescopic pipeline 22 is communicated with the end of the converging pipeline 21 away from the blower 1, and the other end is communicated with the leg rest air guiding part 3; the air blown out from the air outlet passes through the converging pipeline 21 and the telescopic pipeline 22 and is blown to the leg rest air guiding part 3, and then is blown to the surface of the leg rest 4 through the leg rest air guiding part 3, so as to realize the ventilation in the form of blowing air on the main supporting area of the leg rest 4.
[0039] In a preferred embodiment, the telescopic pipeline 22 can be formed by the self-extension of the converging pipeline 21; or one end of the telescopic pipeline 22 is inserted into the converging pipeline 21, and the other end is communicated with the leg rest air guiding part 3. Wherein, if the telescopic pipeline 22 is inserted into the converging pipeline 21, a limiting member for preventing the telescopic pipeline 22 from slipping off should also be configured.
[0040] In a preferred embodiment, the telescopic pipeline 22 can be configured as any one of a bendable rubber and plastic corrugated pipe, a guide chain sleeve or a 3D fabric air guiding layer pipeline, and the specific selection should be made according to the actual situation.
[0041] In a preferred embodiment, a transfer pipe 6 is arranged between the telescopic pipeline 22 and the leg rest air guiding part 3. The transfer pipe 6 has telescopic properties. One end of the transfer pipe 6 is communicated with the telescopic pipeline 22, and the other end is communicated with the leg rest air guiding part 3.
[0042] In a preferred embodiment, the leg rest air guiding part 3 includes an air guiding structure 31 and a plurality of air exhaust channels 32, wherein: the air exhaust channels are formed in the leg rest foam 34 above the leg rest support plate 33; the air guiding structure 31 is arranged on one side of the blower 1 close to the leg rest foam 34 and is communicated with the blower 1 and the air exhaust channels 32; the air blown out by the blower 1 is blown to the air exhaust channels 32 through the air guiding structure 31, and then blown out from the air exhaust channels 32 to the surface of the leg rest 4, so as to realize ventilation in the form of blowing air to the main support area of the leg rest 4.
[0043] In a preferred embodiment, the air guiding structure 31 can be configured as an air bag 7. The air bag includes a sealing layer 72 and an air distribution layer 75. The sealing layer 72 is configured to increase the air tightness of the air distribution layer 75 on the side close to the air outlet of the blower 1. A plurality of holes 71 leading to the air exhaust channels 32 are formed in the air distribution layer 75. An air guiding spacer pressure-bearing filler is further arranged in the air bag 7. The air guiding spacer pressure-bearing filler can play a certain supporting role on the air bag 7 to prevent the air bag 7 from being squeezed and affecting the ventilation effect. The air blown out by the blower 1 is gathered in the air bag 7 and blown out to the surface of the leg rest 4 through the holes 71 and the air exhaust channels 32, so as to realize ventilation in the form of blowing air to the main support area of the leg rest 4.
[0044] In a preferred embodiment, the sealing layer 72 can be a PU film, a TPU film or a polyester material film, but not limited thereto; the air distribution layer 75 can be a PU film, a TPU film, a polyester material film or a breathable non-woven fabric, but not limited thereto.
[0045] In a preferred embodiment, a plurality of forward ventilation holes 73 are further formed in the air distribution layer 75. A forward air outlet 41 communicated with the forward ventilation holes 73 is arranged at the front end of the leg rest 4; part of the air blown out by the blower 1 is blown out to the surface of the leg rest 4 through the holes 71 and the air exhaust channels 32, so as to realize ventilation in the main support area of the leg rest 4; the other part is blown out to the front of the leg rest 4 through the forward ventilation holes 73 and the forward air outlet 41, so as to realize ventilation in the foot area of the occupant in front of the leg rest 4.
[0046] In a preferred embodiment, the air guiding structure 31 can be configured to include an air guiding part 211 and a sealing part 212. The air guiding part 211 includes a plurality of air guiding grooves 25. The air exhaust channels 32 are communicated with the air guiding grooves 25; the sealing part 212 is configured to make the air flow concentratedly to the air guiding part 211; the air blown out by the blower 1 is blown to the surface of the leg rest 3 through the air guiding grooves 25 and the air exhaust channels 32, so as to realize ventilation in the form of blowing air to the main support area of the leg rest 3.
[0047] In a preferred embodiment, a forward air outlet 41 is provided at the front end of the leg rest 4, and the air guide groove 25 extends to communicate with the forward air outlet 41. Part of the air blown out by the blower 1 passes through the air guide groove 25 and the exhaust duct 32 and is blown out to the surface of the leg rest 4 to achieve ventilation in the form of blowing air on the leg rest 4; the other part passes through the air guide groove 25 and the forward air outlet 41 and is blown out in front of the leg rest 4 to achieve ventilation in the foot area of the occupant in front of the leg rest 4.
[0048] In a preferred embodiment, the air guide structure 31 includes an air guide layer 42 provided on the side of the leg rest foam 34 away from the blower 1. The blower 1 communicates with the air guide layer 42. The air guide layer 42 includes, but is not limited to, being made of three-dimensional knitted mesh material; the air blown out by the blower 1 is collected in the air guide layer 42 and then blown from the air guide layer 42 to the surface of the leg rest 4 to achieve ventilation in the form of blowing air on the main support area of the leg rest 4.
[0049] In a preferred embodiment, a air guide grille 8 is correspondingly provided at the forward air outlet 41. The air guide grille 8 is configured to guide the air discharged to the forward air outlet 41 to blow towards the foot area of the occupant. The assembly manner between the air guide grille 8 and the forward air outlet 41 can be plug-in connection, snap connection or connection through fasteners.
[0050] In a preferred embodiment, the air guide grille 8 includes a plurality of air guide vanes 81. The air guide vanes 81 are inclined in the air guide grille 8 to guide the air to blow more concentratedly towards the foot area of the occupant. Among them, the connection relationship between the air guide vanes 81 and the air guide grille 8 can be plug-in connection, snap connection or connection through fasteners, or the air guide vanes 81 and the air guide grille 8 are integrally formed.
[0051] In a preferred embodiment, a fixing part 9 is provided on the converging pipeline 21. The converging pipeline 21 is assembled and fixed to the seat frame through the fixing part 9, and the converging pipeline 21 is reinforced through the fixing part 9; the fixing part 9 can be configured as a clamp or a tension belt, but is not limited thereto. The converging pipeline 21 is assembled and fixed to the seat frame through the clamp or the tension belt, and the converging pipeline 21 is reinforced through the clamp or the tension belt. Embodiment
[0052] On the basis of Embodiment 1, further, the present application proposes an automotive seat, which includes a seat cushion 10, a backrest 11, a leg rest 4 and the leg rest ventilation device involved in the above embodiment, and realizes ventilation in the main support area of the leg rest and the foot area of the occupant in front of the leg rest through the leg rest ventilation device.
[0053] 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 utility model 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. Therefore, it should not be construed as a limitation to the present utility model.
[0054] In addition, terms such as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, "a plurality of" means more than two, unless otherwise specifically and clearly defined.
[0055] In the present application, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0056] 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 recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present utility model, and they should all be covered by 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 herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A seat leg rest ventilation device, the seat comprising a main seat portion and a leg rest portion, the main seat portion and the leg rest portion are provided with a linked seat ventilation device, characterized in that: include: A fan (1), an air distribution unit (2) and a leg support air guide unit (3), The fan (1) is provided with at least one group; an air guide portion (5) is provided on the main seat portion of the chair, and air is sucked into the fan (1) from the seat surface through the air guide portion (5) and then blown out by the fan (1); The air distribution part (2) is arranged between the fan (1) and the leg support air guide part (3), one end of which is connected to the air outlet of the fan (1) and the other end of which is connected to the leg support air guide part (3); When the fan (1) is in operation, air is sucked into the fan (1) from the seat surface through the air guide portion (5), and then blown out through the air outlet of the fan (1), thereby realizing ventilation of the seat in the form of suction; and the air blown out through the air outlet is blown to the surface of the leg rest (4) through the air distribution portion (2) and the leg rest air guide portion (3), thereby realizing ventilation of the leg rest (4) in the form of blowing.
2. The leg support ventilation device according to claim 1, characterized in that: The air distribution part (2) comprises a pipeline assembly (23), and the pipeline assembly (23) comprises at least one retractable part (24).
3. The leg support ventilation device according to claim 2, characterized in that: The pipeline assembly (23) comprises a junction pipeline (21) and a telescopic pipeline (22), wherein: The junction pipe (21) is in communication with the air outlet of the fan (1); one end of the telescopic pipe (22) is in communication with an end of the junction pipe (21) away from the fan (1), and the other end is in communication with the leg support air guide portion (3); The air blown out through the air outlet is blown to the leg rest air guide portion (3) through the junction pipe (21) and the telescopic pipe (22), and then blown to the surface of the leg rest (4) through the leg rest air guide portion (3), thereby achieving ventilation of the leg rest (4) in the form of blowing.
4. The leg support ventilation device according to claim 3, characterized in that: The telescopic pipe (22) is formed by extending the junction pipe (21) itself, or one end of the telescopic pipe (22) is inserted into the junction pipe (21), and the other end is connected to the leg support air guide part (3).
5. The leg support ventilation device according to claim 3 or 4, characterized in that: The leg support air guide portion (3) comprises an air guide structure (31) and a plurality of air exhaust ducts (32), wherein: The exhaust duct (32) is provided on the leg support foam (34); the air guide structure (31) is arranged on a side of the fan (1) close to the leg support foam (34), and is in communication with the fan (1) and the exhaust duct (32); The air blown out by the fan (1) is blown to the exhaust duct (32) through the air guide structure (31), and then blown out from the exhaust duct (32) to the surface of the leg rest (4), thereby achieving ventilation of the leg rest (4) in the form of blowing.
6. The leg support ventilation device according to claim 5, characterized in that: The wind guide structure (31) can be configured as a wind bag (7), the wind bag (7) comprising a sealing layer (72) and an air distribution layer (75), the air distribution layer (75) being provided with a plurality of holes (71) leading to the air exhaust duct (32), and a wind guide interval pressure-bearing filler being further provided in the wind bag (7); The air blown out by the fan (1) is collected in the air bag (7), and is blown out to the surface of the leg rest (4) through the hole (71) and the exhaust duct (32), thereby achieving ventilation of the leg rest (4) in the form of blowing.
7. The leg support ventilation device according to claim 6, characterized in that: The air distribution layer (75) is also provided with a plurality of forward ventilation holes (73), and the front end of the leg support (4) is provided with a forward air outlet (41) connected with the forward ventilation holes (73); A portion of the air blown out by the fan (1) is blown out to the surface of the leg rest (4) through the holes (71) and the exhaust duct (32), thereby ventilating the leg rest (4); and another portion of the air is blown out to the front of the leg rest (4) through the forward ventilation holes (73) and the forward air outlet (41), thereby ventilating the occupant's foot area in front of the leg rest (4).
8. The leg support ventilation device according to claim 5, characterized in that: The air guiding structure (31) can be configured to include an air guiding portion (211) and a sealing portion (212), wherein the air guiding portion (211) includes a plurality of air guiding grooves (25), and the air exhaust duct (32) is connected to the air guiding grooves (25); the sealing portion (212) is configured to allow air to flow toward the air guiding portion (211); the air blown out by the fan (1) is blown toward the surface of the leg rest (4) through the air guiding grooves (25) and the air exhaust duct (32), thereby realizing ventilation of the leg rest (4) in the form of blowing.
9. The leg support ventilation device according to claim 8, characterized in that: A forward air outlet (41) is provided at the front end of the leg rest (4), and the air guide groove (25) extends to communicate with the forward air outlet (41). A portion of the air blown out by the fan (1) is blown out to the surface of the leg rest (4) through the air guide groove (25) and the exhaust duct (32), thereby realizing ventilation of the leg rest (4) in the form of blowing; and the other portion of the air is blown out to the front of the leg rest (4) through the air guide groove (25) and the forward air outlet (41), thereby realizing ventilation of the occupant's foot area in front of the leg rest (4).
10. A car seat, characterized in that: Comprising a leg support ventilation device as described in any one of claims 1-9.