Ventilation system of automobile seat

Abstract

According to the ventilation system of the automobile seat, a first ventilation part is arranged on the side, close to the human body, of the automobile seat, a first space is formed in the other side of the automobile seat, and the first ventilation part and the first space communicate with the ventilation system; the fan structure is arranged in the automobile seat and comprises a first fan and a second fan which are connected in a stacked mode, the first fan is used for blowing air to the first ventilation part, and the second fan is used for sucking air into the automobile seat from the first ventilation part; a ventilation structure is further arranged in the automobile seat, one end of the ventilation structure communicates with the first ventilation part, and the other end of the ventilation structure communicates with the first fan and the second fan. When the ventilation system is used, the ventilation system is switched between an air suction state and an air blowing state by controlling opening and closing of the first fan and the second fan; compared with the prior art, the two independent fans are arranged to be optimally designed for air blowing and air suction correspondingly, so that the optimal effect can be achieved in the two modes, the ventilation efficiency is guaranteed, and the ventilation effect is improved.

Description

TECHNICAL FIELD

[0001] The present application generally relates to the technical field of automobile seat ventilation, and particularly relates to a ventilation system of an automobile seat. BACKGROUND

[0002] With the development of science and technology, people have higher and higher requirements for the comfort of life. Due to weather or environmental factors, in a limited volume of space, air is not circulated, which is not conducive to sweat discharge, and people feel uncomfortable. Therefore, a ventilation system is needed to promote air circulation in the space.

[0003] At present, an integrated blowing and suction fan that sets blowing and suction modes at the same time is arranged in the ventilation system to ventilate the automobile seat. However, in the blowing and suction conversion process of the fan, the two modes cannot achieve the best effect, and the ventilation efficiency and effect are not good. CONTENT OF THE UTILITY MODEL

[0004] In view of the above defects or deficiencies in the prior art, it is desirable to provide a ventilation system of an automobile seat that can solve the above technical problems.

[0005] The present application provides a ventilation system of an automobile seat, which is provided with a first ventilation part on the side close to the human body and a space on the side away from the human body. The first ventilation part and the first space are in communication with the ventilation system, and the ventilation system comprises:

[0006] A fan structure is arranged in the automobile seat, which comprises a first fan and a second fan. The first fan and the second fan are fixedly connected in layers and in air communication. The first fan is used to blow air to the first ventilation part, and the second fan is used to suck air from the first ventilation part to the inside of the first space.

[0007] A ventilation structure is arranged in the automobile seat. One end of the ventilation structure is in communication with the first ventilation part, and the other end of the ventilation structure is in communication with the first fan and the second fan.

[0008] The ventilation system has a first state and a second state. When the ventilation system is in the first state, the first fan is closed, the second fan is opened, the airflow is driven by the second fan, and the airflow flows from the first ventilation part to the first space through the first fan and the second fan. When the ventilation system is in the second state, the first fan is opened, the second fan is closed, the airflow is driven by the first fan, and the airflow flows from the first space to the first ventilation part through the second fan and the first fan.

[0009] According to the technical scheme provided in the application, the automobile seat is internally provided with a passenger support layer; the ventilation structure comprises: a first communication part, which is arranged on the passenger support layer and located on the side of the passenger support layer away from the human body, one side of the first communication part being in communication with the first fan and the second fan, and the other side of the first communication part being in communication with the first ventilation part.

[0010] According to the technical scheme provided in the application, the ventilation structure further comprises a second communication part, the second communication part penetrating through the passenger support layer, one side of the second communication part being in communication with the first ventilation part, and the other side of the second communication part being in communication with the first communication part; when the ventilation system is in the first state, the airflow is driven by the second fan and flows from the first ventilation part to the first space in sequence through the second communication part, the first communication part, the first fan and the second fan; when the ventilation system is in the second state, the airflow is driven by the first fan and flows from the first space to the first ventilation part in sequence through the second fan, the first fan, the first communication part and the second communication part.

[0011] According to the technical scheme provided in the application, the first fan is arranged in the first communication part and fixedly connected with the passenger support layer, and the first fan and the second fan are connected through a connecting structure, which is used to realize the air tightness and stability of the connection between the first fan and the second fan.

[0012] According to the technical scheme provided in the application, the connecting structure is a first puller, the first puller penetrating through the first fan and the second fan, and the first puller being used to fixedly connect the first fan and the second fan.

[0013] According to the technical scheme provided in the application, an elastic sealing piece is arranged between the first fan and the second fan, and the elastic sealing piece is used to protect the sealing property between the first fan and the second fan.

[0014] According to the technical scheme provided in the application, the automobile seat is internally provided with a passenger support layer; the ventilation structure comprises: a first communication part, which is arranged on the passenger support layer and located on the side of the passenger support layer away from the human body, one side of the first communication part being in communication with the first fan and the second fan, and the other side of the first communication part being in communication with the first ventilation part.

[0015] According to the technical scheme provided in the application, the second fan is fixedly connected with the back spring.

[0016] According to the technical scheme provided in the application, the fan structure has a shell, and the first fan and the second fan are connected through the shell.

[0017] According to the technical scheme provided in the application, the first fan is an axial fan or a centrifugal fan, and the second fan is the axial fan or the centrifugal fan.

[0018] The application has the following beneficial effects:

[0019] The application provides a ventilation system of an automobile seat. One side of the automobile seat close to a human body is provided with a first ventilation part, and the side away from the human body has a first space. The first ventilation part and the first space are both in communication with the ventilation system. A fan structure is arranged inside the automobile seat. The fan structure comprises a first fan and a second fan. The first fan and the second fan are fixedly connected. The first fan is used for blowing air to the first ventilation part, and the second fan is used for sucking air from the first ventilation part to the inside of the automobile seat. The inside of the automobile seat is further provided with a ventilation structure. One end of the ventilation structure is in communication with the first ventilation part, and the other end of the ventilation structure is in communication with the first fan and the second fan. When the ventilation system is used, the opening and closing of the first fan and the second fan are controlled, so that the ventilation system can be freely converted between the air-sucking state and the air-blowing state. Compared with the prior art, two independent fans are arranged in the application, which are respectively optimized for air blowing and air sucking, so that the best effect can be achieved in the two modes, thereby ensuring the efficiency of ventilation and improving the ventilation effect. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the accompanying drawings:

[0021] Figure 1 is a schematic diagram of a ventilation system of an automobile seat provided by the application;

[0022] Figure 2 is a schematic diagram of an air-sucking state of a first ventilation system of an automobile seat provided by the application;

[0023] Figure 3 is a schematic diagram of an air-blowing state of a first ventilation system of an automobile seat provided by the application;

[0024] Figure 4 is a working schematic diagram of a first fan and a second fan in a first state and a second state;

[0025] Figure 5 is Figure 1 is a connection schematic diagram of a first fan and a second fan in the application;

[0026] Figure 6 is an exploded schematic diagram of an air-blowing state of a second ventilation system of an automobile seat provided by the application;

[0027] Figure 7 yes Figure 3 An exploded view of the connection between the first and second fan channels and the first tie rod.

[0028] Figure 8 This is an exploded schematic diagram of the airflow state of the third type of car seat ventilation system provided in this application;

[0029] Figure 9 This is an exploded schematic diagram of the air intake state of the ventilation system of the third type of car seat provided in this application;

[0030] Figure 10 This is a schematic diagram showing the matching of the first and second fans;

[0031] Figure 11 This is a schematic diagram showing the connection between the first centrifugal fan and the first centrifugal fan;

[0032] Figure 12 This is a schematic diagram showing the connection between the first centrifugal fan and the first centrifugal fan via a housing;

[0033] Figure 13 This is a schematic diagram showing the connection between the first centrifugal fan and the second centrifugal fan;

[0034] Figure 14 This is a schematic diagram showing the connection between the first centrifugal fan and the second centrifugal fan via a housing;

[0035] Figure 15 This is a schematic diagram showing the connection between the axial flow fan and the second centrifugal fan;

[0036] Figure 16 This is a schematic diagram showing the connection between the axial fan and the second centrifugal fan via a housing;

[0037] Figure 17 This is a schematic diagram showing the connection between the axial fan and the first centrifugal fan;

[0038] Figure 18 This is a schematic diagram showing the connection between the axial fan and the first centrifugal fan via a housing.

[0039] In the figure: 1. First fan; 2. Second fan; 3. First connecting part; 4. First ventilation part; 5. Second connecting part; 6. Occupant support layer; 7. First rivet; 71. First snap-fit ​​part; 72. Second snap-fit ​​part; 8. Connecting pipe; 9. Second rivet; 10. Back spring; 11. Sealing layer; 12. Axial flow fan; 13. First centrifugal fan; 14. Second centrifugal fan; 15. Car seat; 16. Housing; 17. Connecting structure. Detailed Implementation

[0040] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] Example 1

[0043] Please refer to Figures 1-18 This application provides a ventilation system for a car seat. The car seat 15 has a first ventilation section 4 on the side closest to the human body and a space on the side furthest from the human body. Both the first ventilation section 4 and the first space are connected to the ventilation system. The system includes:

[0044] A fan structure is installed inside the car seat 15. The fan structure includes a first fan 1 and a second fan 2. The first fan 1 and the second fan 2 are stacked and fixedly connected and have air passages connected. The first fan 1 is used to blow air to the first ventilation section 4, and the second fan 2 is used to draw air from the first ventilation section 4 into the first space.

[0045] A ventilation structure is installed inside the car seat 15. One end of the ventilation structure is connected to the first ventilation section 4, and the other end of the ventilation structure is connected to the first fan 1 and the second fan 2.

[0046] The ventilation system has a first state and a second state. When the ventilation system is in the first state, the first fan 1 is off and the second fan 2 is on. The airflow is driven by the second fan 2 and flows from the first ventilation section 4 through the first fan 1 and the second fan 2 to the first space. When the ventilation system is in the second state, the first fan 1 is on and the second fan 2 is off. The airflow is driven by the first fan 1 and flows from the first space through the second fan 2 and the first fan 1 to the first ventilation section 4.

[0047] In some embodiments, such as Figure 5 As shown, the first fan 1 and the second fan 2 are arranged along the first direction, and the first fan 1 and the second fan 2 are stacked and fixedly connected and have air passages connected. In this embodiment, the first direction is the horizontal direction.

[0048] In this embodiment, the first fan 1 and the second fan 2 share a single circuit board, with the two sides of the circuit board connected to the stator coils of the first fan 1 and the second fan 2, respectively. This application controls two fans through a single circuit board, which can reduce wiring complexity, lower system failure rate, and facilitate maintenance and upgrades.

[0049] Specifically, in some embodiments, the first ventilation part 4 is a breathable cover. In some cases, a lining can be filled inside the breathable cover, and in some cases, a lining can be filled inside the breathable cover with ventilation holes. The lining is a thin layer of sponge that is sewn together with the cover. This can increase the comfort of the chair surface and provide breathability. In addition, the ventilation holes in the lining make the airflow smoother and the air diffusion better.

[0050] Specifically, in some embodiments, the first ventilation section 4 is a breathable cover filled with soft sponge, and in some cases, it can also be a breathable cover filled with soft sponge with ventilation holes. The soft sponge is a layer of softer sponge on the occupant support layer 6, which can improve the comfort of the seat surface. In this embodiment, the first ventilation section 4 is a breathable cover filled with soft sponge with ventilation holes.

[0051] Specifically, in some embodiments, the first ventilation section 4 can be a breathable cover, and the breathable cover is filled with both soft sponge and lining.

[0052] Working principle: When the ventilation system is in use, the opening and closing of the first fan 1 and the second fan 2 are controlled to allow the ventilation system to switch freely between the suction state and the blowing state. Compared with the prior art, this application sets two independent fans and optimizes the design for blowing and suction respectively, so that the best effect can be achieved in both modes, thereby ensuring ventilation efficiency and improving ventilation effect.

[0053] In some embodiments, the car seat 15 has an occupant support layer 6 inside; the ventilation structure includes a first connecting part 3, which is disposed on the occupant support layer 6 and located on the side of the occupant support layer 6 away from the human body. One side of the first connecting part 3 is connected to the first fan 1 and the second fan 2, and the other side of the first connecting part 3 is connected to the first ventilation part 4.

[0054] Specifically, such as Figure 1As shown, the car seat 15 has an occupant support layer 6 inside. In this embodiment, the occupant support layer 6 is made of foam. The ventilation structure includes a first connecting part 3, which is disposed inside the occupant support layer 6 and located on the side of the occupant support layer 6 away from the human body. The first connecting part 3 has an air guide channel inside, which connects the space around the passenger's body with the first fan 1 or the second fan 2 to allow air circulation. Specifically, a sealing layer 11 is provided on the side of the occupant support layer 6 away from the human body. The sealing layer 11 is used to protect the sealing of the first connecting part 3 and prevent airflow from flowing out from the connection between the first connecting part and the first fan 1, further ensuring the ventilation effect. At the same time, in this embodiment, the first fan 1 is located inside the first connecting part 3. At this time, the sealing layer 11 is located between the first fan 1 and the second fan 2 to protect the sealing between the first fan 1 and the second fan 2. At the same time, the part of the sealing layer 11 located between the first fan 1 and the second fan 2 has a first through hole, which is used to connect the air passages of the first fan 1 and the second fan 2.

[0055] Specifically, such as Figure 2 As shown in the figure, when the ventilation system is in the suction state (i.e., the first state), the airflow direction is as shown in the figure. Figure 4 As shown, the first fan 1 is off and the second fan 2 is on, and the connecting channel connects the second fan 2 with the first ventilation part 4; at this time, the air outside the car seat 15 is driven by the second fan 2, and passes through the first ventilation part 4, the first connecting part 3, the first fan 1, and the second fan 2 in sequence before entering the first space to form a suction effect;

[0056] Specifically, such as Figure 3 As shown in the figure, when the ventilation system is in the blowing state (i.e., the second state), the airflow direction is as shown in the figure. Figure 4 As shown, the first fan 1 is turned on and the second fan 2 is turned off. The connecting channel connects the first fan 1 with the first ventilation section 4. At this time, the air in the first space is driven by the first fan 1 and passes through the second fan 2, the first fan 1, the first connecting section 3, and the first ventilation section 4 in sequence before entering the space around the passenger's body to form a blowing effect.

[0057] Specifically, the first connecting part 3 is a ventilation bag or foam groove;

[0058] In some embodiments, the first connecting part 3 is a ventilation bag made of PU or TPU material, which has excellent wear resistance and corrosion resistance, allowing the ventilation bag to be used for a long time in harsh environments without being easily damaged; at the same time, it has high strength and high toughness, and can withstand greater pressure and impact, effectively protecting the normal operation of the seat ventilation system; wherein, the ventilation bag is provided with a three-dimensional knitted mesh fabric inside, which has a unique three-dimensional structure, providing good elasticity and breathability, so that the ventilation bag can maintain a stable shape and ventilation performance when subjected to pressure, and can keep the air duct unobstructed even under pressure, ensuring ventilation effect; at the same time, the three-dimensional knitted mesh fabric has good breathability and moisture absorption, which can effectively remove moisture from the seat and allow air circulation, thereby providing a better riding experience;

[0059] In some embodiments, the first connecting portion 3 is a foam groove, that is, it is formed on the foam, and a guiding channel is formed inside the foam groove, which connects the first fan 1 or the second fan 2 with the first ventilation portion 4.

[0060] In some embodiments, the ventilation structure further includes a second connecting portion 5, which penetrates the occupant support layer 6. One side of the second connecting portion 5 is connected to the first ventilation portion 4, and the other side of the second connecting portion 5 is connected to the first connecting portion 3. When the ventilation system is in the first state, the airflow is driven by the second fan 2 and flows from the first ventilation portion 4 through the second connecting portion 5, the first connecting portion 3, the first fan 1, and the second fan 2 to the first space. When the ventilation system is in the second state, the airflow is driven by the first fan 1 and flows from the first space through the second fan 2, the first fan 1, the first connecting portion 3, and the second connecting portion 5 to the first ventilation portion 4.

[0061] Specifically, such as Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 8 and Figure 9 As shown, the first connecting part 3 is located on the side of the occupant support layer 6 away from the human body. Therefore, in order to connect the first connecting part 3 with the first ventilation part 4, the ventilation structure also includes a second connecting part 5. The second connecting part 5 penetrates the occupant support layer 6. There are multiple second connecting parts 5, and one side of each second connecting part 5 is connected to the first ventilation part 4, and the other side of the second connecting part 5 is connected to the first connecting part 3.

[0062] Specifically, when the ventilation system is in blowing mode (i.e., the second state), the airflow direction is as follows: Figure 3As shown, at this time, the first fan 1 is turned on and the second fan 2 is turned off, and the connecting channel connects the first fan 1 with the first ventilation section 4; at this time, the air in the first space is driven by the first fan 1, and passes through the second fan 2, the first fan 1, the first connecting section 3, the second connecting section 5, and the first ventilation section 4 in sequence, and then enters the space around the passenger's body to form a blowing effect;

[0063] Specifically, when the ventilation system is in the intake state (i.e., the first state), the airflow direction is as follows: Figure 2 As shown, at this time, the first fan 1 is off and the second fan 2 is on, and the connecting channel connects the second fan 2 with the first ventilation part 4; at this time, the air outside the car seat 15 is driven by the second fan 2, and passes through the first ventilation part 4, the second connecting part 5, the first connecting part 3, the first fan 1, and the second fan 2 in sequence before entering the first space to form a suction effect.

[0064] In some embodiments, the first fan 1 is disposed in the first connecting portion 3 and is fixedly connected to the occupant support layer 6. The first fan 1 and the second fan 2 are connected by a connecting structure 17, which is used to achieve airtightness and stability of the connection between the first fan 1 and the second fan 2.

[0065] In some embodiments, the connection structure 17 is a fixed connection structure, such as a screw, and the first fan 1 and the second fan 2 are connected by screws to achieve the stability of the connection between the first fan 1 and the second fan 2;

[0066] Specifically, the housing sizes of the first fan 1 and the second fan 2 are not the same. When the housing of the first fan 1 is larger, the area for gas flow between the first fan 1 and the first connecting part 3 is correspondingly increased, resulting in better ventilation. At the same time, the impeller sizes of the first fan 1 and the second fan 2 are also different. The ventilation system can be determined as needed to be either strong blowing or strong suction. Since suction has a better cooling effect, the ventilation system is generally chosen to be stronger in suction. Therefore, the impeller of the first fan 1 is larger than the impeller of the second fan 2.

[0067] In some embodiments, the connecting structure 17 is a first rivet 7, which passes through the first fan 1 and the second fan 2, and is used to fix the first fan 1 and the second fan 2 together.

[0068] In some embodiments, such as Figure 6 and Figure 7As shown, the connection structure 17 is a snap-fit ​​connection structure. For example, the connection structure 17 is a first rivet 7. Two first rivets 7 are provided to enhance the stability of the connection between the first fan 1 and the second fan 2. The first rivet 7 extends along a first direction, and a first snap-fit ​​portion 71 and a second snap-fit ​​portion 72 are respectively provided on the first rivet 7 along the first direction. The first rivet 7 passes through the first fan 1 and the second fan 2, and the first snap-fit ​​portion 71 and the second snap-fit ​​portion 72 are snapped with the first fan 1 and the second fan 2 respectively to fix the first fan 1 and the second fan 2 in place. In this embodiment, the first rivet 7 is a soft rubber rivet. The soft rubber rivet has a certain elasticity and shock absorption effect, which can effectively reduce the vibration and noise generated by the first fan 1 and the second fan 2 during operation. At the same time, it can reduce the wear caused by vibration of the first fan 1 and the second fan 2, thereby extending the service life of the first fan 1 and the second fan 2.

[0069] In this embodiment, a back spring 10 is provided on the side of the second fan 2 away from the first fan 1. The second fan 2 is fixedly connected to the back spring 10 to enhance the stability of the first fan 1 and the second fan 2 installed inside the car seat 15.

[0070] In some embodiments, an elastic seal is provided between the first fan 1 and the second fan 2. The elastic seal is used to protect the sealing between the first fan 1 and the second fan 2 and to ensure smooth airflow.

[0071] In some embodiments, a back spring 10 is provided in the first space; the second fan 2 is located on the side of the back spring 10 away from the first fan 1, and the connecting structure 17 is a connecting pipe 8 and a second pull stud 9. One end of the second pull stud 9 is connected to the first fan 1 through the connecting pipe 8, and the other end of the second pull stud 9 passes through the back spring 10 and is connected to the second fan 2.

[0072] Specifically, such as Figure 8 and Figure 9As shown, two connection structures 17 are provided to connect the first fan 1 and the second fan 2, enhancing the stability of the connection between the first fan 1 and the second fan 2. The connection structure 17 consists of a connecting pipe 8 and a second rivet 9. The connecting pipe 8 has a wavy structure and connects to the first fan 1. The second rivet 9 extends in a first direction and has a third snap-fit ​​portion. One end of the second rivet 9 connects to the connecting pipe 8, and the other end passes through the back spring 10 and connects to the second fan 2. At this time, the third snap-fit ​​portion snaps into the second fan 2, thus fixing the first fan 1 and the second fan 2 together. In this embodiment... The connecting pipe 8 is a flexible hose, which is used to connect the air passages of the first fan 1 and the second fan 2, ensuring air passage connectivity between the first fan 1 and the second fan 2; at the same time, it allows for a certain amount of free space between the first fan 1 and the second fan 2, preventing collision noise between the first fan 1 and the second fan 2 when the seat surface of the car seat is compressed; the second rivet 9 is a soft rubber rivet, which can effectively reduce the vibration and noise generated by the first fan 1 and the second fan 2 during operation; at the same time, it can reduce the wear caused by vibration of the first fan 1 and the second fan 2, thereby extending the service life of the first fan 1 and the second fan 2;

[0073] In some embodiments, the connecting tube 8 and the second rivet 9 are integrally formed;

[0074] In this embodiment, the second fan 2 is fixedly connected to the back spring 10 to enhance the stability of the first fan 1 and the second fan 2 installed inside the car seat 15.

[0075] In some embodiments, the fan structure has a housing 16, through which the first fan 1 and the second fan 2 are connected.

[0076] Specifically, such as Figure 12 , Figure 14 , Figure 16 and Figure 18 As shown, the fan structure has a housing 16, and the first fan 1 and the second fan 2 are connected through the housing 16 to achieve airtightness and stability of the connection between the first fan 1 and the second fan 2.

[0077] In some embodiments, the housing 16 is an integral structure that connects the first fan 1 and the second fan 2, thereby enhancing the stability of the connection between the first fan 1 and the second fan 2.

[0078] In some embodiments, the first fan 1 is an axial fan 12 or a second centrifugal fan 14, and the second fan 2 is an axial fan 12 or a second centrifugal fan 14.

[0079] Specifically, such as Figures 11-18As shown, the first fan 1 is either an axial flow fan 12 or a centrifugal fan, and the second fan 2 is either an axial flow fan 12 or a centrifugal fan; wherein, the centrifugal fan has two structures, including as follows Figure 10 The first centrifugal fan 13 and the second centrifugal fan 14 are shown; during use, any one of the first fan 1 and any one of the second fan 2 can be selected for matching according to the usage environment and different characteristics of the fans (e.g., Figure 10 As shown, in this embodiment, there are nine matching methods for the first fan 1 and the second fan 2, namely: 1. The first fan 1 is an axial flow fan 12, and the second fan 2 is an axial flow fan 12; 2. The first fan 1 is an axial flow fan 12, and the second fan 2 is a first centrifugal fan 13; 3. The first fan 1 is an axial flow fan 12, and the second fan 2 is a second centrifugal fan 14; 4. The first fan 1 is a first centrifugal fan 13, and the second fan 2 is an axial flow fan 12; 5. The first fan 1 is a first centrifugal fan 13, and the second fan 2 is a first centrifugal fan 13; 6. The first fan 1 is a first centrifugal fan 13, and the second fan 2 is a second centrifugal fan 14; 7. The first fan 1 is a second centrifugal fan 14, and the second fan 2 is an axial flow fan 12; 8. The first fan 1 is a second centrifugal fan 14, and the second fan 2 is a first centrifugal fan 13; 9. The first fan 1 is a second centrifugal fan 14, and the second fan 2 is a second centrifugal fan 14.

[0080] Specifically, the axial fan 12 has a high air volume and low air pressure, making it suitable for applications requiring large airflow but not high pressure; the first centrifugal fan 13 provides a balance between air volume and air pressure, with a higher pressure coefficient than the axial fan while maintaining a high flow coefficient; the second centrifugal fan 14 provides high air pressure and relatively low air volume, making it suitable for cooling specific areas requiring high-pressure airflow.

[0081] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A ventilation system for a car seat, wherein a first ventilation section (4) is provided on the side of the car seat (15) closest to the human body, and a first space is provided on the side away from the human body, wherein both the first ventilation section (4) and the first space are connected to the ventilation system, characterized in that, include: A fan structure is provided inside the car seat (15). The fan structure includes a first fan (1) and a second fan (2). The first fan (1) and the second fan (2) are stacked and fixedly connected and have air passages connected. The first fan (1) is used to blow air to the first ventilation part (4), and the second fan (2) is used to draw air from the first ventilation part (4) into the first space. A ventilation structure is provided inside the car seat (15), one end of the ventilation structure is connected to the first ventilation part (4), and the other end of the ventilation structure is connected to the first fan (1) and the second fan (2); The ventilation system has a first state and a second state. When the ventilation system is in the first state, the first fan (1) is off and the second fan (2) is on. The airflow is driven by the second fan (2) and flows from the first ventilation section (4) to the first space via the first fan (1) and the second fan (2). When the ventilation system is in the second state, the first fan (1) is on and the second fan (2) is off. The airflow is driven by the first fan (1) and flows from the first space to the first ventilation section (4) via the second fan (2) and the first fan (1).

2. The ventilation system for a car seat according to claim 1, characterized in that, The car seat (15) has an occupant support layer (6) inside; the ventilation structure includes: a first connecting part (3), which is disposed on the occupant support layer (6) and located on the side of the occupant support layer (6) away from the human body, one side of the first connecting part (3) is connected to the first fan (1) and the second fan (2), and the other side of the first connecting part (3) is connected to the first ventilation part (4).

3. The ventilation system for a car seat according to claim 2, characterized in that, The ventilation structure further includes a second connecting part (5), which penetrates the occupant support layer (6). One side of the second connecting part (5) is connected to the first ventilation part (4), and the other side of the second connecting part (5) is connected to the first connecting part (3). When the ventilation system is in the first state, the airflow is driven by the second fan (2) and flows from the first ventilation part (4) through the second connecting part (5), the first connecting part (3), the first fan (1), and the second fan (2) to the first space. When the ventilation system is in the second state, the airflow is driven by the first fan (1) and flows from the first space through the second fan (2), the first fan (1), the first connecting part (3), and the second connecting part (5) to the first ventilation part (4).

4. A ventilation system for a car seat according to claim 3, characterized in that, The first fan (1) is disposed in the first connecting part (3) and is fixedly connected to the occupant support layer (6). The first fan (1) and the second fan (2) are connected by a connection structure (17), which is used to achieve airtightness and stability of the connection between the first fan (1) and the second fan (2).

5. A ventilation system for a car seat according to claim 4, characterized in that, The connection structure (17) is a first rivet (7), which passes through the first fan (1) and the second fan (2) and is used to fix the first fan (1) and the second fan (2) together.

6. A ventilation system for a car seat according to claim 5, characterized in that, An elastic seal is provided between the first fan (1) and the second fan (2), the elastic seal being used to protect the seal between the first fan (1) and the second fan (2).

7. A ventilation system for a car seat according to claim 4, characterized in that, A back spring (10) is provided in the first space; the second fan (2) is located on the side of the back spring (10) away from the first fan (1), and the connection structure (17) is a connecting pipe (8) and a second pull stud (9). One end of the second pull stud (9) is connected to the first fan (1) through the connecting pipe (8), and the other end of the second pull stud (9) passes through the back spring (10) and is connected to the second fan (2).

8. A ventilation system for a car seat according to claim 5 or 7, characterized in that, The second fan (2) is fixedly connected to the back spring (10).

9. A ventilation system for a car seat according to claim 3, characterized in that, The fan structure has a housing (16) through which the first fan (1) and the second fan (2) are connected.

10. A ventilation system for a car seat according to claim 1, characterized in that, The first fan (1) is an axial flow fan (12) or a centrifugal fan, and the second fan (2) is the axial flow fan (12) or the centrifugal fan.

Images