A fan for seat blowing and suction functions and a vehicle seat ventilation system

Abstract

The present application discloses a fan for seat blowing and suction functions and a car seat ventilation system, which relate to the technical field of car seats, wherein the fan comprises: a first shell and a second shell that cooperate with each other, a connecting mechanism and a flow guiding structure; a ventilation space is formed between the two shells, a rotatable fan blade is arranged in the ventilation space, an air outlet channel and an air inlet channel are arranged inside the ventilation space, and the air outlet channel and the air inlet channel are respectively connected with the air outlet and the air inlet arranged by the fan; the connecting mechanism comprises: a driving member and a sliding interface, the driving member is used to drive the sliding interface to switch positions between the air outlet and the air inlet; the flow guiding structure is arranged at the air outlet, the driving member is arranged in the flow guiding structure, and the flow guiding structure is used to divide the air outlet channel into at least two air supply channels; the fan effectively guides the airflow through the flow guiding structure to achieve balanced and stable air distribution, thereby reducing the noise of the ventilation structure and improving the heat dissipation efficiency.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of automobile seats, and in particular to a fan for seat blowing and suction functions and an automobile seat ventilation system. Background Art

[0002] With the development of technology in the field of vehicle transportation, people have higher and higher requirements for vehicle riding comfort. Because the human body is in close contact with the seat, air circulation is blocked, which is not conducive to sweat discharge and makes the human body feel uncomfortable.

[0003] In order to avoid the discomfort caused to the human body by a single ventilation mode, the existing fans used for seat ventilation adopt a ventilation system that can switch between suction and blowing functions. For example, Chinese patent document with publication number CN116901805A discloses a fan for seat ventilation, which switches the wind path relationship between the fan mechanism input and output and the seat ventilation mechanism through the mutual cooperation of the fan mechanism, the connecting parts and the driving mechanism, thereby realizing the switching of the suction and blowing functions.

[0004] However, when we place the driving part in the middle of the air inlet and outlet of the fan, due to the shape and layout of the driving part, it is very easy to cause the airflow generated by the rotation of the fan blades to become turbulent at the air outlet and encounter greater wind resistance, thereby affecting the air output of the fan. For this reason, we propose a fan for seat blowing and suction functions to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a fan for seat blowing and suction functions and a vehicle seat ventilation system.

[0006] In a first aspect, the present application provides a fan for a seat with a blowing and suction function and a vehicle seat ventilation system, the fan comprising: a first shell and a second shell that cooperate with each other, and a ventilation space is formed between the two, a rotatable fan blade is arranged in the ventilation space, and an air outlet channel and an air inlet channel are arranged inside the ventilation space; the air outlet channel and the air inlet channel are respectively connected to the air outlet and the air inlet arranged in the fan;

[0007] A connecting mechanism, the connecting mechanism comprising: a driving member and a sliding interface, the driving member being used to drive the sliding interface to switch positions between the air outlet and the air inlet;

[0008] A flow guiding structure is arranged at the air outlet, the driving member is arranged in the flow guiding structure, and the flow guiding structure is used to separate the air outlet channel into at least two air supply channels.

[0009] According to the technical solution provided by the present application, along the air outlet direction of the rotation of the fan blade, at the air outlet, the first air delivery channel is the first air delivery channel; the guide structure at least includes a first guide wall and a second guide wall formed on both sides of the guide structure close to the first shell;

[0010] The first air delivery channel is formed between the first guide wall and the first shell, and the second air delivery channel is formed between the second guide wall and the first shell;

[0011] A local surface of the outer surface of the first guide wall that is away from the fan blade forms a first angle with the edge of the air outlet, and the first angle is less than or equal to 90°; a local surface of the outer surface of the second guide wall that is close to the fan blade forms a second angle with the edge of the air outlet, and the second angle is greater than or equal to 90°.

[0012] According to the technical solution provided in the present application, the flow guide structure includes a first flow diversion portion and a second flow diversion portion, and the first flow diversion portion and the second flow diversion portion are both located at the air outlet;

[0013] The outer wall of the first flow diverter portion forms the first flow guide wall, and the outer wall of the second flow diverter portion forms the second flow guide wall; the driving member is arranged between the first flow diverter portion and the second flow diverter portion.

[0014] According to the technical solution provided in the present application, the guide structure is located in the middle of the air outlet, and is used to balance the air distribution of the first air supply channel and the second air supply channel.

[0015] According to the technical solution provided in the present application, at least one weight-reducing port is further provided on the first diverter portion and the second diverter portion.

[0016] According to the technical solution provided in the present application, the fan includes: an intermediate shell disposed between the first shell and the second shell;

[0017] The fan blade is arranged on one side of the first shell close to the intermediate shell, a through hole is opened in the middle of the intermediate shell, and the first shell and the second shell are connected through the through hole to form the ventilation space;

[0018] The intermediate shell separates the fan into the air outlet and the air inlet arranged along a first direction; the first direction is a direction perpendicular to the first shell.

[0019] According to the technical solution provided in the present application, the sliding interface is slidably arranged between the air outlet and the air inlet along the first direction, and the side of the sliding interface away from the air outlet is used to connect the air outlet or the air inlet with the surface of the car seat through a ventilation structure.

[0020] According to the technical solution provided in this application, the connecting mechanism includes:

[0021] Guide shafts, which are arranged on both sides of the first shell, extend along the first direction to the second shell, and are connected to the second shell;

[0022] The sliding interface is inserted on the guide shaft, and the side thereof away from the air outlet is connected to the ventilation structure; the sliding interface can slide between the air outlet and the air inlet along the extension direction of the guide shaft;

[0023] The driving end of the driving member is fixedly connected to the sliding interface and is used to drive the sliding interface to slide.

[0024] According to the technical solution provided in this application, guide grooves for cooperating with the guide shaft are provided on both sides of the sliding interface;

[0025] A plurality of protrusions are arranged inside the guide groove, and an oil storage space is formed between two adjacent protrusions for storing oil to assist the movement of the sliding interface.

[0026] In a second aspect, the present application provides a car seat, which is applied with the above-mentioned fan for the seat blowing and sucking air, and further includes:

[0027] In summary, the technical solution specifically discloses a fan and a car seat ventilation system for the seat blowing and sucking functions. Among them, the fan includes: a first shell and a second shell that cooperate with each other, a connecting mechanism and a guide structure. A ventilation space is formed between the first shell and the second shell, and a rotatable fan blade is arranged in the ventilation space. The ventilation space has an air outlet channel and an air inlet channel; the air outlet channel and the air inlet channel are respectively connected to the air outlet and the air inlet arranged by the fan; the connecting mechanism includes: a driving member and a sliding interface, and the driving member is used to drive the sliding interface to switch positions between the air outlet and the air inlet; the guide structure is arranged at the air outlet, and the driving member is arranged in the guide structure, and the guide structure is used to separate the air outlet channel into at least two air supply channels.

[0028] In order to switch between the suction and blowing functions, the existing automobile seat ventilation system often uses a driving mechanism to switch the air path relationship between the fan mechanism input and output and the seat ventilation mechanism. However, due to the particularity of the shape and arrangement position of the driving member, it is very easy to cause the airflow turbulence at the air outlet and encounter large wind resistance. The present application sets a guide structure that can fix the driving member at the air outlet, and uses the design of the guide structure itself to separate the air outlet channel into at least two air delivery channels, so that the airflow can flow smoothly on both sides of the guide structure, effectively reducing internal noise and improving the heat dissipation efficiency of the ventilation structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0030] Figure 1 An exploded schematic diagram of a fan used for seat blowing and suction functions.

[0031] Figure 2 The figure is a schematic diagram of the overall structure of a fan used for blowing and sucking air from a seat.

[0032] Figure 3 This is a schematic diagram of the structure of a fan used for seat blowing and suction functions (excluding the second shell and the intermediate shell).

[0033] Figure 4 The figure is a cross-sectional view of a fan used for blowing and sucking air from a seat.

[0034] Figure 5 This is an enlarged schematic diagram of point B of a fan used for the blowing and suction functions of a seat.

[0035] Figure 6 This is an enlarged schematic diagram of point A of a fan used for the blowing and suction functions of a seat.

[0036] Figure 7 The figure is a schematic diagram of a sliding interface structure in a fan used for seat blowing and suction functions.

[0037] Figure 8 The present invention is a schematic diagram of the partial installation of the first shell and fan blades of a fan used for the blowing and suction functions of a seat.

[0038] Fig. 9 This is a schematic diagram of an explosion of a fan originally used for blowing and sucking air from seats.

[0039] Numbers in the figure: 1. first shell; 11. air outlet; 12. air inlet; 2. second shell; 3. fan blades; 4. flow guide structure; 41. first air delivery channel; 42. first diversion part; 43. second diversion part; 44. second air delivery channel; 45. weight reduction port; 5. intermediate shell; 51. avoidance groove; 6. connecting mechanism; 61. guide shaft; 62. sliding interface; 621. clamping part; 63. driving member; 631. motor; 632. lead screw; 633. fixing block; 64. guide groove; 641. protrusion; 01. original first shell; 02. original second shell; 05. original intermediate shell; 062. original sliding interface; 063. original driving member. DETAILED DESCRIPTION

[0040] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] Example 1

[0043] Please refer to Figure 1 and Figure 4 The exploded schematic diagram and the wind distribution schematic diagram of a ventilation structure for a seat blowing and sucking air provided in the present embodiment are shown, the ventilation structure comprising: a first shell 1 and a second shell 2 that cooperate with each other, and a ventilation space is formed between the two, and a rotatable fan blade 3 is arranged in the ventilation space; an air outlet channel and an air inlet channel are arranged inside the ventilation space; the air outlet channel and the air inlet channel are respectively connected to the air outlet 11 and the air inlet 12 arranged by the fan arrangement;

[0044] The connecting mechanism 6 includes: a driving member 63 and a sliding interface 62, wherein the driving member 63 is used to drive the sliding interface 62 to switch between the air outlet 11 and the air inlet 12;

[0045] The guide structure 4 is arranged at the air outlet 11, and the driving member 63 is arranged in the guide structure 4. The guide structure 4 is used to separate the air outlet channel into at least two air delivery channels.

[0046] In this embodiment, a ventilation space is formed between the first shell 1 and the second shell 2, and a fan blade 3 for generating airflow by rotation is arranged in the ventilation space. Generally, the fan blade 3 is arranged on a fixed axis on the side of the first shell 1 close to the second shell 2; in order to make the ventilation system in the car seat have two ventilation functions of blowing and sucking air on the seat surface, the ventilation space is provided with an air outlet channel and an air inlet channel, and they are respectively connected with the air outlet 11 and the air inlet 12.

[0047] It should be explained that the first shell 1 and the second shell 2 in this embodiment may also be referred to as the lower shell and the upper shell respectively for the sake of ease of introduction, so there is essentially no distinction between the first and the second between the two shells. In addition, the space formed after the two shells are fastened together and fixed by a snap-fit ​​structure is the ventilation space, and the two shells will also form an air outlet for blowing or sucking air after being fastened together, so that the airflow generated by the fan blades 3 can be output to the seat surface or the heat flow of the seat surface can be absorbed.

[0048] Next, the connection mechanism 6 is the main blowing and suction conversion component. The driving member 63 in the connection mechanism 6 can switch between the blowing and suction ventilation functions by driving the sliding interface 62 to switch between the air outlet 11 and the air inlet 12. Specifically, when the sliding interface 62 is connected to the air outlet 11, the ventilation system blows air to the seat surface of the car seat. Conversely, when the sliding interface 62 is connected to the air inlet 12, the ventilation system absorbs the heat flow from the seat surface of the car seat. Figure 4 The dotted arrow in the figure indicates the flow direction of the airflow generated by the air outlet channel when the fan blade 3 rotates. If the sliding interface 62 is connected to the air outlet 11 at this time, it indicates that the ventilation system is currently in the function of blowing air to the seat surface.

[0049] Finally, the guide structure 4 is arranged at the air outlet 11, and the driving member 63 is arranged in the guide structure 4, so that the guide structure 4 divides the air outlet channel into at least two air supply channels. In this way, since the design of the structure of the guide structure 4 itself can divide the air outlet channel into at least two air supply channels in an orderly manner, it can effectively avoid the phenomenon that the air outlet 11 is prone to air flow turbulence and large wind resistance caused by directly setting the driving member at the air outlet 11.

[0050] In a preferred embodiment, see Figure 4 and Figure 5 , along the air outlet direction of the rotation of the fan blade 3, at the air outlet of the ventilation structure, the first air delivery channel is the first air delivery channel 41; the guide structure 4 includes at least a first guide wall and a second guide wall relative to each other; here, the first guide wall and the second guide wall are used to refer to the two inner side walls of the guide structure 4 close to the first shell 1.

[0051] A first air delivery channel 41 is formed between the first guide wall and the first shell 1 , and a second air delivery channel 44 is formed between the second guide wall and the first shell 1 ;

[0052] The local surface of the outer surface of the first guide wall away from the fan blades 3 forms a first angle with the edge of the air outlet 11, and the first angle is less than or equal to 90°; the local surface of the outer surface of the second guide wall close to the fan blades 3 forms a second angle with the edge of the air outlet 11, and the second angle is greater than or equal to 90°.

[0053] Regarding the design of the guide structure 4, in order to ensure that the airflow generated by the fan blades 3 can flow smoothly and evenly, the outer edges of the first guide wall and the second guide wall of the guide structure 4 should preferably follow the flow direction of the airflow generated by the fan blades 3 to reduce the wind resistance caused by the airflow passing through the first air delivery channel 41 and the second air delivery channel 44. Therefore, in the blowing (air outlet) direction along the rotation of the fan blades 3, the first air delivery channel at the air delivery port of the ventilation structure is recorded as the first air delivery channel 41 (for details, see Figure 4), which is formed between the first guide wall and the first shell 1; and another air delivery channel formed between the second guide wall of the same guide structure 4 and the first shell 1 is the second air delivery channel 44.

[0054] In this embodiment, combined with Figure 5 The angle diagram of the first angle and the second angle shown in the figure, because the outer side walls of the first guide wall and the second guide wall have a certain direction design, in the process of defining the angle, the definition of the local surface of the outer side surface is introduced on the basis of the outer side surface, and the local surface is actually the local area of ​​the corresponding outer side surface. The first angle θ formed by the local surface of the outer side surface of the first guide wall away from the fan blade 3 and the edge of the air outlet 11 is Figure 4 The second angle β formed by the local surface of the outer side of the second guide wall close to the fan blade 3 and the edge of the air outlet 11 is Figure 4 The middle is an obtuse angle. When the ventilation system is in the blowing function, the airflow will not be blocked by the guide structure 4 when passing through the first air delivery channel 41 and the second air delivery channel 44, and can flow out smoothly along the outer edges of the first guide wall and the second guide wall, so that the airflow can achieve smooth air distribution through the first air delivery channel 41 and the second air delivery channel 44 at the guide structure 4.

[0055] It should be explained that the angle design of the first angle θ and the second angle β can be adjusted according to current design requirements and is not limited to the angles shown in the various figures.

[0056] In a preferred embodiment, see Figure 4 As shown, the flow guiding structure 4 includes a first flow diverter 42 and a second flow diverter 43, and the first flow diverter 42 and the second flow diverter 43 are both located at the air outlet 11;

[0057] The outer wall of the first diverter portion 42 forms a first flow guide wall, and the outer wall of the second diverter portion 43 forms a second flow guide wall. The driving member 63 is disposed between the first diverter portion 42 and the second diverter portion 43 .

[0058] Among them, the guide structure 4 includes two separated first diversion parts 42 and second diversion parts 43 arranged at the air outlet 11, which can effectively guide the final flow direction of the airflow generated by the fan blades 3, and further achieve the purpose of evenly distributing the airflow on the left and right sides of the guide structure 4. Preferably, the guide structure 4 is arranged in the middle of the air outlet 11, which is used to balance the air distribution of the first air supply channel 41 and the second air supply channel 44. At this time, the airflow flowing through the first air supply channel 41 and the second air supply channel 44 on both sides of the guide structure 4 will be distributed more evenly.

[0059] In addition, the driving member 63 is arranged between the first diversion portion 42 and the second diversion portion 43. In addition to guiding the flow direction of the airflow, it can also ensure the consistency and stability of the up and down switching of the sliding interface 62, and can also greatly reduce the installation area occupied by each component at the air outlet, thereby ensuring the air supply area and improving the heat dissipation efficiency.

[0060] In a preferred embodiment, see Figure 3 As shown, at least one weight-reducing opening 45 is further provided on the first diverter portion 42 and the second diverter portion 43 to reduce the overall weight of the ventilation structure, thereby improving the lightweight advantage of the ventilation structure.

[0061] In a preferred embodiment, see Figure 4 , the fan further includes: an intermediate shell 5 disposed between the first shell 1 and the second shell 2;

[0062] The fan blade 3 is arranged on one side of the first shell 1 close to the intermediate shell 5. A through hole is opened in the middle of the intermediate shell 5, and the first shell 1 and the second shell 2 are connected through the through hole to form a ventilation space;

[0063] The intermediate housing 5 separates the fan into an air outlet 11 and an air inlet 12 arranged along a first direction. The first direction is parallel to the axial direction of the fan blades 3, that is, the vertical direction.

[0064] See also Figure 2 As shown, for ease of understanding, in this embodiment, the outer edge of the intermediate housing 5 is between the first housing 1 and the second housing 2, and the space originally formed by the first housing 1 and the second housing 2 is divided into two, and the two spaces separated by the intermediate housing 5 respectively form the air inlet channel and the air outlet channel of the fan. Correspondingly, the air outlet of the air inlet channel is the air inlet 12, and the air outlet of the air outlet channel is the air outlet 11. Among them, since the driving member 63 has a certain stroke height to support the sliding interface 62 to switch and slide between the air outlet 11 and the air inlet 12, the intermediate housing 5 is provided with an avoidance groove 51, and the extension space of the driving member 63 is reserved through the avoidance groove 51, so that it can extend to the second housing 2.

[0065] In a preferred embodiment, see Figure 3-Figure 7 The sliding interface 62 is slidably arranged between the air outlet 11 and the air inlet 12 along a first direction, and the side of the sliding interface 62 away from the air outlet 11 is used to connect the air outlet 11 or the air inlet 12 with the surface of the car seat through the ventilation structure.

[0066] Driven by the driving member 63, the sliding interface 62 enables the ventilation system to switch between the blowing and suction functions more smoothly. At the same time, the side of the sliding interface 62 away from the air outlet 11 is connected to a ventilation structure, which is used to transport the airflow generated by the fan blades 3 to the car seat surface through the air outlet 11 or to transport the heat flow at the car seat surface; here, the type of ventilation structure can be a ventilation bag, an air duct, a seat foam groove and other structures, and there is no specific limitation.

[0067] In a preferred embodiment, see Figure 1 , Figure 3 as well as Figure 8 , the connecting mechanism 6 comprises:

[0068] Guide shafts 61, which are disposed on both sides of the first housing 1, and extend along the first direction to the second housing 2 and are connected to the second housing 2;

[0069] The number of guide shafts 61 can be selected to be two, and they are respectively arranged on both sides of the first shell 1 to provide guidance for the sliding of the sliding interface 62. The length of the guide shaft 61 must meet the moving range of the sliding interface 62 between the air outlet 11 and the air inlet 12.

[0070] The sliding interface 62 is inserted on the guide shaft 61, and the side thereof away from the air outlet is connected to the ventilation structure; the sliding interface 62 can slide between the air outlet 11 and the air inlet 12 along the extension direction of the guide shaft 61;

[0071] The sliding interface 62 is a component that mainly performs the conversion between the blowing and suction modes. The sliding interface 62 can slide along the extension direction of the guide shaft 61 to enable the sliding interface 62 to dock with the air outlet 11 and the air inlet 12. When the sliding interface 62 docks with the air outlet 11, the airflow at the air outlet 11 can be blown to the car seat surface via the ventilation structure. Conversely, when the sliding interface 62 docks with the air inlet 12, the air inlet 12 can absorb the heat flow at the car seat surface through the ventilation structure.

[0072] The driving member 63 is disposed on the first housing 1 , and a driving end of the driving member 63 is fixedly connected to the sliding interface 62 for driving the sliding interface 62 to slide.

[0073] The driving member 63 is a component for driving the sliding interface 62 to move. The driving member 63 is arranged on a side of the first shell 1 close to the second shell 2 and located in the middle of the first shell 1, which can effectively ensure the consistency and stability of the up and down switching of the sliding interface 62.

[0074] Specifically, see Figure 1 and Figure 8As shown, the driving member 63 includes a motor 631, a lead screw 632 and a fixed block 633 threadedly connected to the lead screw 632; wherein the fixed block 633 is used to be fixedly connected with the clamping portion 621 on the sliding interface 62, and when the motor 631 drives the lead screw 632 to rotate, the lead screw 632 can drive the fixed block 633 and the sliding interface 62 to reciprocate along the first direction, wherein the length of the lead screw 632 also needs to meet the moving stroke range of the connecting mechanism 6 between the air outlet 11 and the air inlet 12.

[0075] Different from Fig. 9 In the original fan structure shown, the original driving component 063 is directly arranged on the first shell 01, which will make the original fan structure affected by the shape of the original driving component 063 itself and the particularity of the arrangement position, resulting in the phenomenon that the airflow at the air outlet 11 is turbulent and the wind resistance encountered is large.

[0076] In a preferred embodiment, see Figure 7 and Figure 8 As shown, guide grooves 64 for cooperating with the guide shaft 61 are provided on both sides of the sliding interface 62;

[0077] A plurality of protrusions 641 are disposed inside the guide groove 64 , and an oil storage space is formed between two adjacent protrusions 641 for storing oil to assist the movement of the sliding interface 62 .

[0078] In order to ensure the smooth movement of the sliding interface 62 on the guide shaft 61 and reduce the friction between the two, a plurality of oil storage spaces are formed by adding a protrusion 641, so that a certain amount of oil (for example, lubricating oil) can be stored between the guide groove 64 and the guide shaft 61. Since the guide shaft 61 is fixed to both sides of the first shell 1, the applied oil can eventually drip into the space where the guide shaft 61 is set on both sides of the first shell 1 (generally, technicians will also control the amount so that the oil will not overflow), thereby ensuring that the ventilation structure can be switched smoothly and quickly between the blowing and suction modes.

[0079] Example 2

[0080] Based on the fan for seat blowing and suction functions in Example 1, this embodiment proposes a car seat ventilation system, which also includes: a ventilation structure; the ventilation structure connects the fan's air outlet 11 and air inlet 12 to the surface of the car seat through a connecting mechanism 6.

[0081] The fan can be connected to the surface of the car seat through the ventilation structure, so that it can blow air to the car seat surface or absorb the heat flow from the car seat surface; combined with the content in Example 1, it can be seen that the rotation of the fan blades 3 can generate airflow, which is the power source of the entire ventilation system. If the ventilation system is in the blowing function, the ventilation structure can deliver the airflow from the air outlet 11 to the surface of the car seat. If the ventilation system is in the suction function, the ventilation structure can suck in the heat flow from the surface of the car seat through the air inlet 12 to reduce the heat sensation of the user sitting on the car seat.

[0082] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A fan for a seat with blowing and suction functions, characterized in that: The fan comprises: A first shell (1) and a second shell (2) cooperate with each other and form a ventilation space therebetween; a rotatable fan blade (3) is arranged in the ventilation space; an air outlet channel and an air inlet channel are provided inside the ventilation space; the air outlet channel and the air inlet channel are respectively connected to an air outlet (11) and an air inlet (12) arranged in an array on the fan; A connecting mechanism (6), the connecting mechanism (6) comprising: a driving member (63) and a sliding interface (62), the driving member (63) being used to drive the sliding interface (62) to switch positions between the air outlet (11) and the air inlet (12); A flow guiding structure (4), the flow guiding structure (4) being arranged at the air outlet (11), the driving member (63) being arranged in the flow guiding structure (4), and the flow guiding structure (4) being used to separate the air outlet channel into at least two air delivery channels.

2. A fan for seat blowing and suction functions according to claim 1, characterized in that: Along the air outlet direction of the rotation of the fan blade (3), at the air outlet (11), the first air delivery channel is a first air delivery channel (41); the guide structure (4) at least comprises a first guide wall and a second guide wall formed on both sides of the guide structure (4) close to the first shell (1); The first air delivery channel (41) is formed between the first guide wall and the first shell (1), and the second air delivery channel (44) is formed between the second guide wall and the first shell (1); A local surface of the outer surface of the first guide wall that is away from the fan blade (3) forms a first angle with the edge of the air outlet (11), and the first angle is less than or equal to 90°; a local surface of the outer surface of the second guide wall that is close to the fan blade (3) forms a second angle with the edge of the air outlet (11), and the second angle is greater than or equal to 90°.

3. A fan for seat blowing and suction functions according to claim 2, characterized in that: The flow guiding structure (4) comprises a first flow diversion portion (42) and a second flow diversion portion (43), and the first flow diversion portion (42) and the second flow diversion portion (43) are both located at the air outlet (11); The outer wall of the first flow diverter (42) forms the first flow guide wall, and the outer wall of the second flow diverter (43) forms the second flow guide wall; the driving member (63) is arranged between the first flow diverter (42) and the second flow diverter (43).

4. A fan for a seat with blowing and suction functions according to claim 2, characterized in that: The air guide structure (4) is located in the middle of the air outlet (11) and is used to balance the air distribution of the first air delivery channel (41) and the second air delivery channel (44).

5. The fan for seat blowing and suction functions according to claim 3, characterized in that: At least one weight-reducing port (45) is also provided on the first flow diversion portion (42) and the second flow diversion portion (43).

6. A fan for seat blowing and suction functions according to claim 1, characterized in that: The fan comprises: an intermediate shell (5) arranged between the first shell (1) and the second shell (2); The fan blade (3) is arranged on a side of the first shell (1) close to the intermediate shell (5); a through hole is provided in the middle of the intermediate shell (5); the first shell (1) and the second shell (2) are connected via the through hole to form the ventilation space; The intermediate shell (5) separates the fan into the air outlet (11) and the air inlet (12) arranged in a first direction; the first direction is a direction perpendicular to the first shell (1).

7. A fan for seat blowing and suction functions according to claim 6, characterized in that: The sliding interface (62) is slidably arranged between the air outlet (11) and the air inlet (12) along the first direction, and the side of the sliding interface (62) away from the air outlet (11) is used to connect the air outlet (11) or the air inlet (12) to the surface of the car seat through a ventilation structure.

8. The fan for seat blowing and suction functions according to claim 7, characterized in that: The connecting mechanism (6) comprises: Guide shafts (61), the guide shafts (61) being arranged on both sides of the first shell (1), extending along the first direction to the second shell (2), and being connected to the second shell (2); The sliding interface (62) is inserted into the guide shaft (61), and the side thereof away from the air outlet (11) is connected to the ventilation structure; the sliding interface (62) can slide between the air outlet (11) and the air inlet (12) along the extension direction of the guide shaft (61); The driving end of the driving member (63) is fixedly connected to the sliding interface (62) and is used to drive the sliding interface (62) to slide.

9. A fan for a seat with blowing and suction functions according to claim 8, characterized in that: Guide grooves (64) for cooperating with the guide shaft (61) are provided on both sides of the sliding interface (62); A plurality of protrusions (641) are provided inside the guide groove (64), and an oil storage space is formed between two adjacent protrusions (641) for storing oil to assist the movement of the sliding interface (62).

10. A vehicle seat ventilation system, characterized in that: A fan for seat blowing and suction functions according to any one of claims 1 to 9 is used, further comprising: a ventilation structure; the ventilation structure connects the air outlet (11) and the air inlet (12) of the fan to the surface of the car seat through the connecting mechanism (6).

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