Leg rest ventilation mechanism, seat leg rest ventilation device and automobile seat

Abstract

Provided are a leg rest ventilation device, a seat leg rest ventilation device, and an automobile seat, relating to the technical field of automobile seats. The leg rest ventilation device, the seat leg rest ventilation device and the automobile seat provided in the present application can ensure that seat areas and leg rest areas maintain a ventilation state at the same time, thereby effectively solving the technical problem in the prior art that there is no ventilation in leg rest areas, and significantly improving the riding comfort of passengers.

Description

A leg rest ventilation mechanism, a seat leg rest ventilation device, and a car seat

[0001] Cross-reference to related applications

[0002] This disclosure claims priority to Chinese patent applications filed on July 23, 2024, with application number 2024217545103 entitled "A Leg Support Ventilation Mechanism" and application number 2024217500615 entitled "A Seat Leg Support Ventilation Device and Automobile Seat", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of automotive seat technology, and in particular to a leg rest ventilation mechanism, a seat leg rest ventilation device, and an automotive seat. Background Technology

[0004] With the continuous development of automotive technology, people have increasingly higher requirements for the comfort of vehicle seats. Currently, vehicle seats are usually equipped with air conditioning and ventilation devices and leg rest structures. The ventilation function of the air conditioning and ventilation device can effectively improve the air circulation environment of the part of the body in contact with the seat surface, so that even if you sit for a long time, the contact surface between the body and the seat will be dry and comfortable. The leg rest structure provides support for the legs, improving the comfort of passengers.

[0005] In related technologies, vehicle seats are equipped with seat air conditioning and ventilation devices. These devices use an internal fan power module to directly blow or draw air into the seat's ventilation circuit, providing active seat cooling or heating ventilation for a more direct and rapid sense of comfort. However, most seats do not have independent ventilation systems in the leg rests, resulting in poor air exchange in the leg and foot areas. In practice, the entire vehicle's air conditioning system is typically used to cool the cabin and improve ventilation in these areas, but this leads to higher energy consumption and significant energy loss. Furthermore, the contact area between the passenger's legs and the leg rests creates a noticeable heat and sweatiness, negatively impacting passenger comfort. Summary of the Invention

[0006] The purpose of this disclosure is to provide a leg rest ventilation device, a seat leg rest ventilation device, and an automobile seat that can ensure that the leg rest area and the main seat area can be ventilated simultaneously, thereby improving the comfort of passengers.

[0007] The embodiments of this disclosure can be implemented as follows:

[0008] In a first aspect, this disclosure provides a leg support ventilation device, comprising: a fan, a first conveying mechanism, and a second conveying mechanism;

[0009] The fan provides an air source, and the fan has at least one first air outlet and at least one second air outlet;

[0010] The first conveying mechanism is configured to connect the first air vent and the seat surface of the main seating area; the second conveying mechanism is configured to connect the second air vent and the leg rest surface.

[0011] In an optional implementation, the first air outlet is the air inlet of the fan, and the second air outlet is the air outlet of the fan.

[0012] In an optional embodiment, the second conveying mechanism includes,

[0013] The second air guide mechanism is located at the leg rest and is configured to evenly transmit the received airflow to the surface of the leg rest.

[0014] At least one second connecting pipe, the two ends of which are respectively connected to the second air guide mechanism and the second air outlet;

[0015] The second connecting pipe has an excess length, or the second connecting pipe has a first telescopic section, configured to at least ensure that the air passage between the second air guide mechanism and the fan remains connected during the adjustment of the leg support.

[0016] In an optional implementation, the first telescopic section includes a corrugated structure.

[0017] In an optional embodiment, the first expansion section of the second connecting pipe includes a first sleeve and a second sleeve;

[0018] The first sleeve and the second sleeve are sleeved together and can slide relative to each other along their length.

[0019] In an optional embodiment, the second connecting pipe includes a first connecting pipe and a second connecting pipe detachably connected thereto, and the two are interconnected when connected.

[0020] The first connecting pipe is connected to the fan;

[0021] One end of the second connecting pipe is connected to the first connecting pipe, and the other end is connected to the second air guide mechanism.

[0022] In an optional embodiment, the second connecting pipe is a flexible hose; or,

[0023] The second air guiding mechanism includes a second ventilation bag, and the second connecting pipe is integrally connected to the second ventilation bag.

[0024] In an optional embodiment, the second connecting pipe has a second telescopic section; or,

[0025] The second connecting pipe has excess length;

[0026] The configuration ensures that the airflow path of the second conveying mechanism remains open when the leg support is adjusted at an angle.

[0027] In an optional embodiment, the fan has at least two second air outlets, and the second connecting pipe is arranged corresponding to the second air outlets, configured to divide the airflow drawn in or blown out by the fan into multiple parts and deliver them to multiple positions of the leg rest respectively.

[0028] In an optional implementation, a cooler is also included;

[0029] The cooler is located at the air outlet; or...

[0030] The cooler is installed in the second conveying mechanism.

[0031] Secondly, this disclosure also provides a seat leg rest ventilation device. The seat includes a main seat portion and a leg rest portion. The main seat portion and the leg rest portion are equipped with a linked seat ventilation device, which includes a fan, an air distribution section, and a leg rest air guide section. At least one set of fans is provided. The main seat portion is provided with an air guide section. Air is drawn into the fan from the seat surface through the air guide section and then blown out by the fan. The air distribution section is located between the fan and the leg rest air guide section. One end of the air distribution section is connected to the air outlet of the fan, and the other end is connected to the leg rest air guide section. When the fan is in working condition, air is drawn into the fan from the seat surface through the air guide section and then blown out by the air outlet of the fan, realizing seat suction ventilation. The air blown out through the air outlet is blown onto the leg rest surface through the air distribution section and the leg rest air guide section, realizing leg rest blowing ventilation.

[0032] In an optional embodiment, the air distribution unit includes a piping assembly, the piping assembly including at least one retractable portion.

[0033] In an optional embodiment, the piping assembly includes a manifold pipe and a telescopic pipe, wherein: the manifold pipe is connected to the air outlet of the fan; one end of the telescopic pipe is connected to the end of the manifold pipe away from the fan, and the other end is connected to the leg rest air guide; the air blown out through the air outlet is blown to the leg rest air guide through the manifold pipe and the telescopic pipe, and then blown to the leg rest surface through the leg rest air guide, thereby realizing ventilation in the form of leg rest blowing.

[0034] In an optional embodiment, the telescopic pipe may be formed by extending the manifold itself; or one end of the telescopic pipe may be inserted into the manifold, and the other end may be connected to the leg support air guide.

[0035] In an optional embodiment, the leg rest air guide includes an air guide structure and a plurality of exhaust ducts, wherein: the exhaust ducts are formed on the leg rest foam; the air guide structure is disposed on the side of the fan close to the leg rest foam and is connected to the fan and the exhaust ducts; the air blown out by the fan is blown to the exhaust ducts through the air guide structure and then blown out from the exhaust ducts to the surface of the leg rest, thereby realizing ventilation in the form of air blowing from the leg rest.

[0036] In an optional embodiment, the air guiding structure can be configured as an air bag, which includes a sealing layer and an air distribution layer. The air distribution layer has a plurality of holes leading to the exhaust duct. The air bag is also provided with an air guiding spacer pressure-bearing filler. The air blown out by the fan is collected in the air bag and blown out to the leg rest surface through the holes and the exhaust duct, thereby realizing ventilation in the form of air blowing on the leg rest.

[0037] In an optional embodiment, the air distribution layer is further provided with a plurality of forward ventilation holes, and the front end of the leg rest is provided with a forward air outlet communicating with the forward ventilation holes; 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 to achieve leg rest ventilation; the other part is blown out to the front of the leg rest through the forward ventilation holes and the forward air outlet to achieve ventilation of the occupant's foot area in front of the leg rest.

[0038] In an optional embodiment, the air guiding structure can be configured to include an air intake section and a sealing section. The air intake section includes a plurality of air guide grooves, and the exhaust duct communicates with the air guide grooves. The sealing section is configured to concentrate airflow toward the air intake section. The air blown out by the fan is blown toward the leg rest surface through the air guide grooves and the exhaust duct, thereby achieving ventilation in the form of a leg rest blowing air.

[0039] In an optional embodiment, the front end of the leg rest is provided with a forward air outlet, and the air guide groove extends to communicate with the forward air outlet. Part of the air blown out by the fan is blown out to the surface of the leg rest through the air guide groove and the exhaust duct to achieve ventilation in the form of air blowing from the leg rest; another part is blown out to the front of the leg rest through the air guide groove and the forward air outlet to achieve ventilation of the occupant's foot area in front of the leg rest.

[0040] Thirdly, an automobile seat is provided that includes the leg rest ventilation device described in any of the above claims.

[0041] The beneficial effects of the leg rest ventilation device, seat leg rest ventilation device, and automobile seat provided in this disclosure include:

[0042] On the one hand, the leg rest ventilation device provided in this disclosure fully utilizes the airflow generated by the second air outlet of a fan and the airflow drawn in by the first air outlet of the fan to transmit the blown airflow to the main seat area and the drawn airflow to the leg rest area; or, the blown airflow is transmitted to the leg rest area and the drawn airflow is delivered to the main seat area. This ensures that both the main seat area and the leg rest area can maintain ventilation simultaneously without the need for additional air sources, making it economical and environmentally friendly. It effectively solves the technical problem of no ventilation in the leg rest area in the prior art, and significantly improves the passenger's riding comfort.

[0043] On the other hand, the seat leg rest ventilation device and car seat disclosed herein allow air to be drawn into the seat surface through the air guide section and then blown out through the air outlet of the air guide section when the fan is in operation, thus achieving seat suction ventilation. The air blown out through the air outlet is blown onto the leg rest surface through the air distribution section and the leg rest air guide section, thus achieving leg rest blowing ventilation. At the same time, the secondary utilization of wind energy also reduces energy consumption. In addition, the advantages of simple structure, easy assembly, and safe and reliable use make it easy to implement and promote its application. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 is an exploded view of a leg support ventilation device provided in an embodiment of this disclosure;

[0046] Figure 2 is a schematic diagram of the structure of a leg support ventilation device provided in the embodiment of this disclosure in the leg support extended state;

[0047] Figure 3 is a schematic diagram of the structure of a leg support ventilation device provided in the embodiment of this disclosure in the retracted state of the leg support;

[0048] Figure 4 is a schematic diagram of an adjustable-angle leg rest provided in an embodiment of this disclosure;

[0049] Figure 5 is a structural schematic diagram of a second conveying mechanism in a retracted state according to an embodiment of this disclosure;

[0050] Figure 6 is a magnified view of part A in Figure 5;

[0051] Figure 7 is a structural schematic diagram of a second conveying mechanism under a stretched state according to an embodiment of this disclosure;

[0052] Figure 8 is a structural schematic diagram of the second air guide mechanism and its interface connecting pipe in an embodiment of this disclosure;

[0053] Figure 9 is a structural schematic diagram of a second ventilation bag provided in an embodiment of this disclosure.

[0054] Figure 10 is a structural schematic diagram of the leg support ventilation device according to an embodiment of the present disclosure;

[0055] Figure 11 is a schematic diagram of the seat structure showing the leg rest ventilation;

[0056] Figure 12 is a cross-sectional schematic diagram showing the leg support ventilation device;

[0057] Figure 13 is an enlarged schematic diagram that clearly shows the leg support ventilation device in Figure 12;

[0058] Figure 14 is a cross-sectional schematic diagram showing the leg support ventilation device in the open state;

[0059] Figure 15 is an enlarged schematic diagram that clearly shows the leg support ventilation device in Figure 14;

[0060] Figure 16 is a partial schematic diagram showing the leg support ventilation device when the universal telescopic pipe and the manifold pipe are connected.

[0061] Figure 17 is a schematic diagram showing another form of the air guide structure;

[0062] Figure 18 is an explosion diagram showing the leg support ventilation device.

[0063] The text labels in the diagram represent: 11. Fan; 12. First conveying mechanism; 121. First ventilation bag; 122. First foam body; 13. Second conveying mechanism; 131. Second ventilation bag; 132. Second foam body; 133. Corrugated structure; 134. First sleeve; 135. Second sleeve; 136. Sealing ring; 137. First connecting pipe; 138. Second connecting pipe; 139. Support structure; 14. Main seat bracket; 15. Leg support bracket; 161. Air pump; 162. First airbag; 163. First elastic element; 171. Tilting support body; 172. Rotating shaft; 173. Second airbag; 174. Second elastic element; 1. Fan; 2. Air distribution unit; 21. Combination pipe; 22. Telescopic pipe; 3. Leg support air guide; 31. Air guide structure; 32. Exhaust duct; 33. Leg support support plate; 34. Leg support foam; 4. Leg support; 41. Forward air outlet; 42. Air guide layer; 5. Air guide unit; 6. Transfer pipe; 7. Air bag; 71. Hole; 72. Sealing layer; 73. Forward ventilation hole; 8. Air guide grille; 81. Air guide blades; 9. Fixing part; 10. Seat cushion. Detailed Implementation

[0064] To enable those skilled in the art to better understand the technical solutions of this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. The descriptions in this section are merely illustrative and explanatory, and should not be construed as limiting the scope of protection of this disclosure. Specifically, the described embodiments are only some embodiments of this disclosure, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort should fall within the scope of protection of this disclosure.

[0065] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be optionally defined and interpreted in subsequent figures. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0066] This embodiment provides a leg rest ventilation device configured in a car seat to achieve ventilation in the main support area of ​​the leg rest and the area in front of the occupant's feet.

[0067] This embodiment provides a car seat, which includes a seat cushion 10, a backrest 11, a leg rest 4, and a leg rest ventilation device. The leg rest ventilation device enables ventilation of the main support area of ​​the leg rest and the area in front of the occupant's feet.

[0068] As shown in Figures 1-9, this embodiment provides a leg support ventilation device, including: a fan 11, a first conveying mechanism 12, and a second conveying mechanism 13;

[0069] The fan 11 provides an air source, and the fan 11 has at least one first air outlet and at least one second air outlet;

[0070] The first conveying mechanism 12 is configured to connect the first air vent and the seat surface of the main seating area; the second conveying mechanism 13 is configured to connect the second air vent and the leg rest surface.

[0071] It is understandable that by fully utilizing the airflow generated by the second vent of a fan 11 and the airflow drawn in by the first vent of the same fan 11, the blown airflow is delivered to the main seat area of ​​the main seat, and the drawn airflow is delivered to the leg rest area of ​​the leg rest surface; or, the blown airflow is delivered to the leg rest area of ​​the leg rest surface, and the drawn airflow is delivered to the main seat area of ​​the main seat. This ensures that both the main seat area and the leg rest area can maintain ventilation simultaneously without the need for additional air sources, making it economical and environmentally friendly. It effectively solves the technical problem of no ventilation in the leg rest area in existing technologies, significantly improving passenger comfort.

[0072] In this embodiment, the leg support ventilation device includes a fan 11.

[0073] The fan 11 provides an air source and has at least one first air outlet and at least one second air outlet.

[0074] In this embodiment, the first air outlet is the air inlet of the fan 11, and the second air outlet is the air outlet of the fan 11.

[0075] The first conveying mechanism 12 is connected to the air inlet of the fan 11 and can provide the main seat with the intake airflow.

[0076] The second conveying mechanism 13 is connected to the air outlet to provide airflow to the leg rest; or the first conveying mechanism 12 is connected to the air outlet of the fan 11 to provide airflow to the main seat; the second conveying mechanism 13 is connected to the air inlet to provide airflow to the leg rest.

[0077] Understandably, the airflow generated by the outlet of a fan 11 and the airflow drawn in by the inlet of the same fan 11 are fully utilized to deliver the blown airflow to the main seat area and the drawn airflow to the leg rest area; or, the blown airflow is delivered to the leg rest area and the drawn airflow is delivered to the main seat area. This ensures that both the main seat area and the leg rest area can maintain ventilation simultaneously without the need for additional air sources, making it economical and environmentally friendly. It effectively solves the technical problem of no ventilation in the leg rest area in existing technologies, significantly improving passenger comfort.

[0078] Optionally, if the first air vent includes at least one, it can be one, two, or the same number; if the second air vent includes at least one, it can be one, two, or the same number.

[0079] In this embodiment, the fan 11 has one first air outlet and one second air outlet. Of course, in other alternative embodiments, the fan 11 may have one first air outlet and at least two second air outlets. The fan 11 may also have at least two first air outlets and at least two second air outlets. The number and combination of the first and second air outlets are not limited to the above embodiments and can be selected according to actual conditions.

[0080] In this embodiment, the distance between the leg rest and the main seat is adjustable, allowing the leg rest to move relative to the main seat. Therefore, the leg rest ventilation device, leg rest telescopic mechanism, and / or angle adjustment structure enable the leg rest to move relative to the main seat.

[0081] In an optional embodiment, the leg support ventilation device includes a leg support telescopic mechanism. This mechanism is configured to extend or retract the leg support. As shown in Figure 4, the leg support telescopic mechanism includes a main seat support 14, a leg support bracket 15, an air pump 161, a connecting pipe, a first airbag 162, and an elastic element. The leg support bracket 15 is slidably connected to the main seat support 14 and is provided with a guide rail. The first airbag 162 is disposed between the main seat support 14 and the leg support bracket 15, and the expansion direction of the first airbag 162 is the same as the sliding direction of the leg support.

[0082] Under normal conditions, the first airbag 162 is in a contracted state, and the leg rest is also in a contracted state. The air pump 161 inflates the first airbag 162 through the connecting pipe. The first airbag 162 expands and pushes out the leg rest, which is in an extended state. At the same time, it charges the first elastic element 163.

[0083] When the leg support needs to be retracted, the air pump 161 stops inflating, the first airbag 162 deflates, and the leg support bracket 15 resets under the elastic force of the first elastic element 163. At this time, the leg support is in the retracted state.

[0084] Optionally, the power source for the translational movement of the leg support bracket 15, the first airbag 162 and the elastic element, can be replaced by other driving components, such as electric lead screws, hydraulic levers, etc., or can be manually moved by hand. The design scheme provided in this disclosure improves the air guiding method and route, which can ensure that the surface of the leg support and the surface of the main seat are ventilated at the same time during the translational movement of the leg support, and can be configured into telescopic leg supports driven by various methods.

[0085] In an optional embodiment, the leg rest ventilation device includes an angle adjustment structure, enabling the leg rest to have an angle adjustment function. As shown in Figure 4, the angle adjustment structure includes: a flip support 171, an air pump 161, a second airbag 173, a connecting pipe, and a second elastic element 174; the flip support 171 is hinged to the leg rest bracket 15, and the second airbag 173 is disposed between the flip support 171 and the leg rest bracket 15. Under normal conditions, the flip support 171 is in a horizontal state. The air pump 161 inflates the second airbag 173, causing the flip support 171 to gradually flip upward. The flip angle of the flip support 171 is adjusted by controlling the expansion degree of the airbag. The second elastic body is located away from the rotation axis of the flip support 171. The two ends of the second elastic body are connected to the flip support 171 and the leg support bracket 15, respectively. As the flip angle of the flip support 171 increases, the second elastic body gradually charges. When it is necessary to reduce the flip angle of the leg support, the air pump 161 reduces the inflation of the second airbag 173. The second airbag 173 expands and contracts, and the flip support 171 flips downward under the elastic force of the second elastic element 174.

[0086] In an optional embodiment, the power source second airbag 173 of the tilting support 171 can be replaced by other driving components, such as an electric screw, hydraulic rod, etc. The main body end is rotatably connected to the leg support bracket 15, and the telescopic top end is slidably connected to the tilting support 171; or, a motor is used in conjunction with a transmission to directly drive the rotating shaft of the tilting support 171; or, it is manually moved by manpower. For the structure of the air supply section, please refer to the above embodiments, which will not be described in detail here.

[0087] In this embodiment, the leg support ventilation device includes a first conveying mechanism 12.

[0088] In this embodiment, the first conveying mechanism 12 includes a first connecting pipe, a first air guiding mechanism, and a first foam body 122. The first air guiding mechanism can be a first ventilation bag 121, which can be located on the side of the first foam body 122 away from the human body. In this case, the first connecting pipe connects the air inlet of the fan 11 to the first ventilation bag 121. The first ventilation bag 121 has multiple ventilation holes densely arranged on it, and the ventilation holes on the first ventilation bag 121 correspond to the ventilation holes on the first foam body 122. The airflow drawn in from the surface of the main seat is conducted through the ventilation holes on the first foam body 122 and the ventilation holes on the first ventilation bag 121, and then enters the fan 11 through the first connecting pipe. The first ventilation bag 121 can be set on the side of the first foam 122 closest to the human body. At this time, a breathable seat cover is provided on the side of the first ventilation bag 121 closest to the human body. The connecting pipe passes through the first foam 122 to connect the first ventilation bag 121 with the air inlet of the fan 11. The airflow drawn in from the surface of the main seat is conducted through the ventilation holes on the seat cover and the first ventilation bag 121, and then enters the fan 11 through the first connecting pipe.

[0089] In this embodiment, the leg support ventilation device includes a second conveying mechanism 13.

[0090] In this embodiment, the second conveying mechanism 13 includes a second connecting pipe, a second air guide 11, and a second foam body 132. The structure and function of the second air guide 11 and the second foam body 132 are the same as those of the first conveying mechanism 12 described above. It should be noted that the second conveying mechanism 13 is connected to the air outlet of the fan 11, and delivers a uniformly blown airflow to the leg rest surface. As follows: the second air guide 11 can be a second ventilation bag 131, which can be set on the side of the second foam body 132 away from the human body. At this time, the second connecting pipe connects the air outlet of the fan 11 to the second ventilation bag 131. The second ventilation bag 131 has multiple ventilation holes densely arranged on it, and the ventilation holes on the second ventilation bag 131 correspond to the ventilation holes on the second foam body 132. The air outlet of the fan 11 is blown out by the second connecting pipe, and the airflow is conducted through the ventilation holes on the second ventilation bag 131 and the second foam body 132, delivering a uniformly blown airflow to the leg rest surface.

[0091] In addition, the second connecting pipe of the second conveying mechanism 13 has excess length, or the second connecting pipe is provided with a first telescopic section, configured to at least satisfy the requirement that the air passage between the second guide fan 11 and the fan 11 remains connected during the adjustment of the leg support.

[0092] In an optional embodiment, the first ventilation bag 121 and the second foam body 132 of the first conveying mechanism 12, and the second ventilation bag 131 and the second foam body 132 of the second conveying mechanism 13, can be replaced by other air guiding devices that can uniformly guide airflow to the seat surface. For example, grooves can be opened in the foam, or a three-dimensional knitted mesh can be placed in the groove. In addition, different types of air guiding devices can be used for the leg rest and the main seat.

[0093] As shown in Figures 5-7, during the extension and retraction of the leg support, the second conveying mechanism 13 needs to maintain unobstructed airflow between the fan 11 and the leg support. Therefore, this disclosure configures the second connecting pipe to have a spare length or to have a first extension section, so as to at least ensure that the airflow between the second guide fan 11 and the fan 11 remains connected during the adjustment of the leg support.

[0094] In an alternative embodiment, the second connecting pipe between the fan 11 and the leg support has excess length.

[0095] In an optional embodiment, as shown in Figures 2-3, the second connecting pipe between the fan 11 and the leg support has a first telescopic section. The first telescopic section includes a corrugated structure 133. When the leg support extends, the corrugated structure 133 is stretched to protect the connecting pipe from being broken; when the leg support retracts, the corrugated structure 133 contracts to prevent the connecting pipe from accumulating and knotting, ensuring unobstructed airflow in the connecting pipe. The corrugated structure 133 is a ventilation duct with corrugated pleats in its wall, possessing both telescopic and ventilation properties; specifically, a corrugated pipe can be used.

[0096] Of course, in other embodiments, the second connecting pipe may be a different ventilation pipe having a first telescopic section.

[0097] In this embodiment, as shown in Figures 5-7, the second connecting pipe between the fan 11 and the leg support has a first telescopic section. The first telescopic section of the second connecting pipe includes a first sleeve 134 and a second sleeve 135. The first sleeve 134 and the second sleeve 135 are sleeved together and can slide relative to each other in their length direction. To ensure the sealing between the sleeves, a sealing ring 136 is also provided, which is located between the gaps in the walls of the first sleeve 134 and the second sleeve 135. The sealing ring 136 is fixedly and tightly connected to the first sleeve 134 and abuts against the second sleeve 135. The overlapping length of the sleeved section of the first sleeve 134 and the second sleeve 135 is greater than the maximum translational distance of the leg support. During installation, adjust the relative sliding direction of the two sleeves (the length direction of the sleeve area) to keep them parallel to the translation direction of the leg support. The first sleeve 134 is fixedly connected to the fan 11 and is relatively fixed relative to the main support bracket 14. The second sleeve 135 is fixedly connected to the second ventilation bag 131 and is relatively fixed relative to the leg support bracket 15. During the extension and retraction of the leg support, the first sleeve 134 and the second sleeve 135 are pulled to slide relative to each other. During the sliding process, the first sleeve 134 and the second sleeve are always kept in contact, that is, the air path is kept unobstructed.

[0098] As shown in Figures 8 and 9, in an optional embodiment, when the second air guide fan 11 and the leg support are spaced apart (with a supporting buffer between them), the second connecting pipe includes a first connecting pipe 137 and a second connecting pipe 138 detachably connected thereto. The first connecting pipe 137 and the second connecting pipe 138 can communicate with each other when connected. The first connecting pipe 137 is connected to the fan 11. The second connecting pipe 138 is located at the leg support, communicates with the second ventilation bag 131, and remains relatively fixed to the leg support bracket 15.

[0099] Optionally, the leg support bracket 15 has a through groove or through hole for receiving the first connecting tube 137. The first connecting tube 137 passes through the through groove or through hole and connects to the second connecting tube 138. Of course, the leg support bracket 15 can also have a sealed through hole, with the first connecting tube 137 communicating with the lower opening of the sealed through hole, and the second connecting tube 138 communicating with the upper opening of the sealed through hole. The end of the second connecting tube 138 away from the first connecting tube 137 is connected to the ventilation bag.

[0100] In an optional embodiment, the leg support bracket 15 and the main seat bracket 14 are respectively provided with grooves to accommodate the first connecting pipe and the second connecting pipe. When the position is adjusted, sufficient space is provided for the first connecting pipe and the second connecting pipe, and the movement path of the first connecting pipe and the second connecting pipe can be limited, which can optionally improve the stability of the pipe.

[0101] In an optional embodiment, the second conveying mechanism 13 includes a second connecting pipe 138 that connects the second ventilation bag 131 to the fan 11, wherein the second ventilation bag 131 is fixedly disposed relative to the flipping support 171.

[0102] Optionally, the second connecting pipe 138 passes at least through the pivot 172 where the leg support angle changes, ensuring that the airflow of the second conveying mechanism 13 remains connected when the leg support angle is adjusted. The extension path of the second connecting pipe 138 passes through the pivot 172. In this case, the second connecting pipe 138 can be integrally connected to the second ventilation bag 131; the second connecting pipe 138 can be a flexible hose.

[0103] Of course, in other embodiments, the second connecting pipe 138 may also have a second telescopic section, such as a corrugated structure 133, to ensure that the air path of the second conveying mechanism 13 remains connected when the leg support is adjusted at an angle.

[0104] Of course, in other embodiments, the second connecting pipe 138 may also have excess length to ensure that the air passage of the second conveying mechanism 13 remains connected when the leg support is adjusted at the angle.

[0105] Optionally, a support structure 139 is provided inside the second connecting pipe 138. The support structure 139 extends along the diameter of the second connecting pipe 138, ensuring that the pipe path of the second connecting pipe 138 remains unobstructed and preventing the ventilation airflow from being interrupted when the second connecting pipe 138 is compressed by passengers. Optionally, the support structure 139 can be a guide chain, universal joint, corrugated pipe, or other auxiliary support structure 139.

[0106] In an optional embodiment, the fan 11 has at least two second air outlets, and a second connecting pipe is correspondingly arranged with the second air outlets, configured to divide the airflow drawn in or blown out by the fan 11 into multiple parts, which are then delivered to multiple positions of the leg rests. Optionally, but not limited to, the leg rests are of a left-right split type, and the second conveying mechanism 13 has a branch air passage, which divides the airflow drawn in or blown out by the fan 11 into two parts, which are then delivered to the left and right leg rests respectively. The fan 11 has only one air inlet and one air outlet, and the second connecting pipe has a branch air passage at its interface with the fan 11, which divides the airflow exiting the fan 11 into two parts, which are then delivered to the left and right leg rests respectively. When the fan 11 itself has two air outlets / inlets, two identical connecting pipes are used to ventilate the left and right leg rests.

[0107] In an optional embodiment, the leg support ventilation device further includes a cooler; the cooler is disposed at the air outlet of the fan 11; or, the cooler is disposed at a first conveying mechanism 12 or a second conveying mechanism 13 connected to the air outlet of the fan 11.

[0108] It's understandable that when the seat ventilation is first turned on, the high-temperature air drawn in can be detrimental if blown to another area. We can connect a thermoelectric cooler to the air outlet or its connected piping to cool the air using semiconductors, thus directing the cooler air to the legs or buttocks. However, installing the cooler in the air inlet duct or at the fan 11 will result in temperature loss as the air passes through the fan 11, reducing cooling efficiency. Once the temperature drops or after running for a period of time, the thermoelectric cooler can be shut off to reduce energy consumption.

[0109] To facilitate understanding by those skilled in the art, the working principle of the leg support ventilation device provided in this embodiment is as follows:

[0110] Existing ventilated seats only ventilate the main seat area. However, the fan 11 inevitably has an air inlet and an air outlet. The technical solution provided in this disclosure makes full use of the air inlet and outlet of the fan 11, transmitting one air inlet to the main seat area and the other to the leg rest area. After the fan 11 starts working, it ventilates both the main seat area and the leg rest area simultaneously, improving the comfort of the user.

[0111] In summary, the leg rest ventilation device provided in this embodiment fully utilizes the airflow generated by the second air outlet of a fan 11 and the airflow drawn in by the first air outlet of the fan 11. The blown airflow is delivered to the main seat area, and the drawn airflow is delivered to the leg rest area; or, the blown airflow is delivered to the leg rest area, and the drawn airflow is delivered to the main seat area. This ensures that both the main seat area and the leg rest area can maintain ventilation simultaneously without requiring additional air sources. It is economical and environmentally friendly, effectively solving the technical problem of no ventilation in the leg rest area in the prior art, and significantly improving passenger comfort.

[0112] As shown in Figures 10-18, this embodiment also provides a seat leg rest ventilation device, which is configured in a car seat to achieve ventilation of the main support area of ​​the leg rest 4 and the area of ​​the occupant's feet in front of the leg rest 4.

[0113] This embodiment also provides a car seat, which includes a seat cushion 10, a backrest, a leg rest 4, and a seat leg rest ventilation device, which enables ventilation of the main support area of ​​the leg rest 4 and the area in front of the leg rest 4 for the occupant's feet.

[0114] As shown in Figures 10-18, this embodiment provides a seat leg support ventilation device. The seat includes a main seat part and a leg support part, and the main seat part and the leg support part are provided with a linked seat ventilation device.

[0115] The seat ventilation system includes: a fan 1, an air distribution unit 2, and a leg rest air guide unit 3;

[0116] At least one set of fans 1 is provided;

[0117] An air guide 5 is provided on the main seat part of the seat. Air is drawn into the fan 1 from the seat surface through the air guide 5 and then blown out by the fan 1.

[0118] The air distribution unit 2 is located between the fan 1 and the leg support air guide unit 3, with one end connected to the air outlet of the fan 1 and the other end connected to the leg support air guide unit 3.

[0119] When the fan 1 is in operation, air is drawn into the fan 1 from the seat surface through the air guide 5 and then blown out through the air outlet of the fan 1, thus achieving ventilation in the form of air intake of the seat; while the air blown out through the air outlet is blown to the surface of the leg rest 4 through the air distribution part 2 and the leg rest air guide part 3, thus achieving ventilation in the form of air blowing of the leg rest 4. At the same time, the wind energy is reused, which also reduces energy consumption.

[0120] In this embodiment, the seat ventilation device includes a fan 1.

[0121] Optionally, as shown in Figure 10, the fan 1 includes at least one fan, and the fan 1 can be one, two, three, etc., and is not limited to the above-described embodiments.

[0122] Optionally, as shown in Figures 10-11, the fan 1 can be installed on the seat cushion 10 or on the backrest. In this embodiment, the air source guiding the airflow towards the occupant's legs or feet can be the air exhausted from the fan 1 when the seat cushion 10 is ventilated by suction (also referred to as "exhaust air"), or the air exhausted from the fan 1 when the backrest is ventilated by suction (also referred to as "exhaust air"). Furthermore, the specific installation method of the fan 1 on the seat cushion 10 or the backrest is a conventional technique in the art. It can be that the fan 1 is assembled and fixed to the seat frame, or that the fan 1 is pre-embedded in the foam, but it is not limited to the above-described embodiments.

[0123] In this embodiment, the seat ventilation device includes an air distribution unit 2.

[0124] The main seat is equipped with an air guide 5. Air is drawn into the fan 1 from the seat surface through the air guide 5 and then blown out by the fan 1. The air distribution part 2 is located between the fan 1 and the leg rest air guide 3. One end of the part is connected to the air outlet of the fan 1 and the other end is connected to the leg rest air guide 3.

[0125] In an alternative embodiment, the air distribution unit 2 includes a duct assembly, which includes at least one telescopic part configured to ensure that the leg support 4 remains connected to the fan 1 even when adjusted to a large angle, i.e., the ventilation effect of the leg support ventilation device is not affected by the movement of the leg support 4.

[0126] In an alternative embodiment, as shown in Figures 12, 14, 16, and 18, the piping assembly includes a manifold pipe 21 and a telescopic pipe 22, wherein:

[0127] The manifold pipe 21 is connected to the air outlet of the fan 1; one end of the telescopic pipe 22 is connected to the end of the manifold pipe 21 away from the fan 1, and the other end is connected to the leg support air guide 3; the air blown out through the air outlet is blown to the leg support air guide 3 through the manifold pipe 21 and the telescopic pipe 22, and then blown to the surface of the leg support 4 through the leg support air guide 3, so as to realize the ventilation of the main support area of ​​the leg support 4 by blowing air.

[0128] Optionally, as shown in Figures 12-18, the telescopic pipe 22 can be formed by extending the manifold pipe 21 itself; or one end of the telescopic pipe 22 can be inserted into the manifold pipe 21 and the other end can be connected to the leg support air guide 3; if the telescopic pipe 22 is inserted into the manifold pipe 21, a limiting member should also be provided to prevent the telescopic pipe 22 from slipping.

[0129] Optionally, the telescopic duct 22 can be configured as any one of a bendable rubber and plastic corrugated duct, an air guide chain sleeve, or a 3D fabric air guide layer duct. The specific selection should be made according to the actual situation.

[0130] In an optional embodiment, as shown in Figures 12-18, a connecting pipe 6 is provided between the telescopic pipe 22 and the leg support air guide 3. The connecting pipe 6 is telescopic, with one end connected to the telescopic pipe 22 and the other end connected to the leg support air guide 3.

[0131] In an optional embodiment, as shown in FIG18, a fixing part 9 is provided on the manifold 21. The manifold 21 is assembled and fixed to the seat frame through the fixing part 9, and the fixing part 9 reinforces the manifold 21. The fixing part 9 can be configured as a clamp or a tension band, but is not limited to this. The manifold 21 is assembled and fixed to the seat frame through the clamp or tension band, and the manifold 21 is reinforced through the clamp or tension band.

[0132] In this embodiment, the leg support ventilation device includes a leg support air guide 3.

[0133] In an optional embodiment, as shown in Figures 12-18, the leg support air guide 3 includes an air guide structure 31 and several exhaust ducts 32, wherein: the exhaust ducts 32 are opened on the leg support foam 34 above the leg support support plate 33; the air guide structure 31 is disposed on the side of the fan 1 near the leg support foam 34 and is connected to the fan 1 and the exhaust ducts 32; the air blown out by the fan 1 is blown to the exhaust ducts 32 through the air guide structure 31, and then blown outward from the exhaust ducts 32 to the surface of the leg support 4, thereby realizing ventilation in the main support area of ​​the leg support 4 by blowing air.

[0134] In an optional embodiment, as shown in Figures 13, 15, and 16, the air guiding structure 31 can be configured as an air bag 7. The air bag 7 includes a sealing layer 72 and an air distribution layer. The sealing layer 72 is configured to increase the air tightness of the air distribution layer near the air outlet of the fan 1. The air distribution layer has several holes 71 leading to the exhaust duct 32. The air bag 7 is also provided with an air guiding spacer pressure-bearing filler. The air guiding spacer pressure-bearing filler can provide a certain support for the air bag 7 and prevent the air bag 7 from being squeezed and affecting the ventilation effect. The air blown out by the fan 1 is gathered into the air bag 7 and blown out to the surface of the leg support 4 through the holes 71 and the exhaust duct 32, realizing the ventilation of the main support area of ​​the leg support 4 by blowing air.

[0135] Optionally, the sealing layer 72 can be a PU film, a TPU film, or a polyester film, but is not limited thereto; the air distribution layer can be a PU film, a TPU film, a polyester film, or a breathable nonwoven fabric, but is not limited thereto.

[0136] Optionally, as shown in Figures 15, 16, and 18, a number of forward ventilation holes 73 are also provided on the air distribution layer, and a forward air outlet 41 connected to the forward ventilation holes 73 is provided at the front end of the leg rest 4; part 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 to realize ventilation of 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 to realize ventilation of the occupant's foot area in front of the leg rest 4.

[0137] In another alternative embodiment, the air guiding structure 31 can be configured to include an air intake section and a sealing section. The air intake section includes several air guiding grooves, and the exhaust duct 32 is connected to the air guiding grooves. The sealing section is configured to concentrate the air flow to the air intake section. The air blown out by the fan 1 is blown onto the surface of the leg support 4 through the air guiding grooves and the exhaust duct 32, thereby realizing ventilation in the main support area of ​​the leg support 4 in the form of air blowing.

[0138] Optionally, as shown in Figures 10, 11, and 15, a forward air outlet 41 is provided at the front end of the leg rest 4, and an air guide groove extends to communicate with the forward air outlet 41. Part 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 and the exhaust duct 32 to achieve ventilation in the form of air blowing on the leg rest 4; the other part is blown out to the front of the leg rest 4 through the air guide groove and the forward air outlet 41 to achieve ventilation in the area of ​​the occupant's feet in front of the leg rest 4.

[0139] Optionally, as shown in Figure 18, the air guiding structure 31 also includes an air guiding layer 42 disposed on the side of the leg support foam 34 away from the fan 1. The fan 1 is connected to the air guiding layer 42. The air guiding layer 42 is not limited to being made of a three-dimensional knitted mesh material. The air blown out by the fan 1 is collected in the air guiding layer 42 and then blown onto the surface of the leg support 4 through the air guiding layer 42, thereby realizing ventilation in the main support area of ​​the leg support 4 in the form of air blowing.

[0140] Optionally, as shown in Figures 10, 13, 15, 16, and 18, a guide grille 8 is provided at the front air outlet 41. The guide grille 8 is configured to guide the air discharged to the front air outlet 41 towards the occupant's foot area. The assembly method between the guide grille 8 and the front air outlet 41 can be plug-in, snap-fit, or connected by fasteners.

[0141] Optionally, as shown in Figure 16, the air guide grille 8 includes several air guide blades 81. The air guide blades 81 are inclinedly arranged inside the air guide grille 8. The air guide blades 81 guide the air to blow more concentratedly towards the occupant's foot area. The connection between the air guide blades 81 and the air guide grille 8 can be plugged in, snapped in, or connected by fasteners. Alternatively, the air guide blades 81 and the air guide grille 8 can be integrally formed.

[0142] In summary, the seat leg rest ventilation device proposed in this embodiment allows air to be drawn into the seat surface through the air guide 5 when the fan 1 is in operation, and then blown out through the air outlet of the fan 1, thus achieving ventilation in the form of seat suction. The air blown out through the air outlet is blown onto the surface of the leg rest 4 through the air distribution 2 and the leg rest air guide 3, thus achieving ventilation in the form of leg rest blowing. At the same time, the secondary utilization of wind energy also reduces energy consumption. In addition, the device has the advantages of simple structure, easy assembly, and safe and reliable use, making it easy to implement and promote its application.

[0143] This document uses specific examples to illustrate the principles and implementation methods of this disclosure. The descriptions of the above embodiments are merely configured to help understand the methods and core ideas of this disclosure. The above descriptions are only optional implementation methods of this disclosure. It should be noted that due to the limitations of textual expression, and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this disclosure, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the disclosed concepts and technical solutions to other situations without modification, should all be considered within the scope of protection of this disclosure. Industrial applicability

[0144] The leg rest ventilation device, seat leg rest ventilation device and car seat disclosed herein can ensure that the seat area and the leg rest area are ventilated at the same time, effectively solving the technical problem of no ventilation in the leg rest area in the prior art, and significantly improving the passenger's riding comfort.

Claims

1. A leg rest ventilation device, characterized in that, The leg rest ventilation device comprises: a fan (1), a first air conveying mechanism (2) and a second air conveying mechanism (3); the fan (1) provides air source, and the fan (1) has at least one first air port and at least one second air port; the first air conveying mechanism (2) is configured to connect the first air port and the seat surface of the main seat area; and the second air conveying mechanism (3) is configured to connect the second air port and the surface of the leg rest.

2. The leg rest venting arrangement of claim 1, wherein, The first air port is the air inlet of the fan (1), and the second air port is the air outlet of the fan (1).

3. Leg rest ventilation arrangement according to any of claims 1 or 2, characterized in that The second air conveying mechanism (3) comprises: a second air guiding mechanism arranged at the leg rest and configured to uniformly transmit the received air flow to the surface of the leg rest; at least one second connecting pipeline, two ends of the second connecting pipeline being respectively connected with the second air guiding mechanism and the second air port; the second connecting pipeline has excess length, or the second connecting pipeline has a first telescopic section configured to at least ensure that the air passage between the second air guiding mechanism and the fan (1) remains connected during the positioning of the leg rest.

4. The leg rest venting arrangement of claim 3, wherein, The first telescopic section comprises a corrugated structure (133).

5. Leg rest ventilation arrangement according to any of claims 3 or 4, characterized in that The first telescopic section of the second connecting pipeline comprises a first sleeve (134) and a second sleeve (135); the first sleeve (134) and the second sleeve (135) are sleeved with each other and can slide relative to each other in the length direction.

6. Leg rest ventilation arrangement according to any of claims 3-5, characterized in that The second connecting pipeline comprises a first connecting pipeline (137) and a second connecting pipeline (138) detachably connected with the first connecting pipeline (137), and the first connecting pipeline (137) and the second connecting pipeline (138) are connected with each other to communicate with each other; the first connecting pipeline (137) is connected with the fan (1); the second connecting pipeline (138) is connected at one end with the first connecting pipeline (137) and at the other end with the second air guiding mechanism.

7. The leg rest vent arrangement of claim 6, wherein, The second connecting pipeline (138) is a flexible hose; or the second air guiding mechanism comprises a second air bag (131), and the second connecting pipeline (138) is integrally connected with the second air bag (131).

8. The leg rest ventilation device according to any one of claims 6 or 7, wherein: the second connecting pipeline (138) has a second telescopic section; or the second connecting pipeline (138) has excess length; and configured to ensure that the air passage of the second air conveying mechanism (3) remains connected during the angle adjustment of the leg rest.

9. Leg rest ventilation arrangement according to any of claims 3-8, characterized in that The fan (1) has at least two second air ports, and the second connecting pipeline is arranged corresponding to the second air ports, and configured to divide the inhaled air or the blown air provided by the fan (1) into multiple parts and convey the multiple parts to multiple positions of the leg rest.

10. Leg rest ventilation arrangement according to any of claims 2-9, characterized in that The leg rest ventilation device further comprises a refrigerator; the refrigerator is arranged at the air outlet; or the refrigerator is arranged at the second air conveying mechanism (3).

11. A seat leg rest ventilation device, said seat comprising a main seat portion and a leg rest portion, said main seat portion and said leg rest portion being provided with a linked seat ventilation device, characterised in that, The leg rest ventilation device comprises: a fan (1), an air distribution part (2) and a leg rest air guiding part (3), the fan (1) has at least one group; the main seat part of the seat is provided with an air guiding part (5), air is inhaled from the seat surface into the fan (1) through the air guiding part (5), and then blown out by the fan (1); The air distribution part (2) is arranged between the fan (1) and the leg rest air guide 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 guide part (3); When the fan (1) is in working state, air is sucked into the fan (1) from the seat surface through the air guide part (5), and then is blown out from the air outlet of the fan (1), realizing ventilation in the form of air suction of the seat; and the air blown out from the air outlet passes through the air distribution part (2) and the leg rest air guide part (3) to blow to the surface of the leg rest (4), realizing ventilation in the form of air blowing of the leg rest (4).

12. The leg rest ventilation device according to claim 11, characterized in that: The air distribution part (2) comprises a pipeline assembly, and the pipeline assembly comprises at least one telescopic part.

13. The leg rest ventilation device according to claim 12, characterized in that: The pipeline assembly comprises a joint pipeline (21) and a telescopic pipeline (22), wherein: The joint pipeline (21) is communicated with the air outlet of the fan (1); one end of the telescopic pipeline (22) is communicated with one end of the joint pipeline (21) away from the fan (1), and the other end is communicated with the leg rest air guide part (3); The air blown out from the air outlet passes through the joint pipeline (21) and the telescopic pipeline (22) to blow to the leg rest air guide part (3), and then is blown to the surface of the leg rest (4) through the leg rest air guide part (3), realizing ventilation in the form of air blowing of the leg rest (4).

14. The leg rest ventilation device according to claim 13, characterized in that: The telescopic pipeline (22) is formed by self-extension of the joint pipeline (21), or one end of the telescopic pipeline (22) is inserted into the joint pipeline (21), and the other end is communicated with the leg rest air guide part (3).

15. The leg rest ventilation device according to any one of claims 13 or 14, characterized in that: The leg rest air guide part (3) comprises an air guide structure (31) and a plurality of air exhaust channels (32), wherein: The air exhaust channels (32) are arranged on the leg rest foam (34); the air guide structure (31) is arranged on the side of the fan (1) close to the leg rest foam (34), and is communicated with the fan (1) and the air exhaust channels (32); The air blown out from the fan (1) passes through the air guide structure (31) to blow to the air exhaust channels (32), and then is blown out from the air exhaust channels (32) to the surface of the leg rest (4), realizing ventilation in the form of air blowing of the leg rest (4).

16. The leg rest ventilation device according to claim 15, characterized in that: The air guide structure (31) can be configured as a wind bag (7), the wind bag (7) comprises a sealing layer (72) and an air distribution layer, a plurality of holes (71) leading to the air exhaust channels (32) are arranged on the air distribution layer, and a wind guide interval pressure bearing filler is further arranged in the wind bag (7); The air blown out from the fan (1) is collected to the wind bag (7), and then is blown out from the holes (71) and the air exhaust channels (32) to the surface of the leg rest (4), realizing ventilation in the form of air blowing of the leg rest (4).

17. The leg rest ventilation device according to claim 16, characterized in that: a plurality of forward ventilation holes (73) are further formed on the air distribution layer, and a forward air outlet (41) is arranged at the front end of the leg rest (4) and communicates with the forward ventilation holes (73); the air blown by the air blower (1) is partially blown out to the surface of the leg rest (4) through the holes (71) and the air exhaust channel (32) to achieve ventilation of the leg rest (4); and the other part 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) to achieve ventilation of the passenger's foot area in front of the leg rest (4).

18. The leg rest ventilation device according to any one of claims 15 or 16, characterized in that: the air guide structure (31) can be configured to include an air guide part and a sealing part, the air guide part includes a plurality of air guide grooves, and the air exhaust channel (32) communicates with the air guide grooves; the sealing part is configured to concentrate air flow to the air guide part; and the air blown by the air blower (1) is blown to the surface of the leg rest (4) through the air guide grooves and the air exhaust channel (32) to achieve ventilation in the form of air blowing of the leg rest (4).

19. The leg rest ventilation device according to claim 18, characterized in that: the leg rest (4) is provided with a forward air outlet (41) at the front end, and the air guide grooves extend to communicate with the forward air outlet (41); and the air blown by the air blower (1) is partially blown out to the surface of the leg rest (4) through the air guide grooves and the air exhaust channel (32) to achieve ventilation in the form of air blowing of the leg rest (4); and the other part of the air is blown out to the front of the leg rest (4) through the air guide grooves and the forward air outlet (41) to achieve ventilation of the passenger's foot area in front of the leg rest (4).

20. An automotive seat, characterized by including: the leg rest ventilation device according to any one of claims 1-9; or, the leg rest ventilation device according to any one of claims 1-19.

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