A fan for ventilating a seat

Abstract

The application provides a fan for seat ventilation, comprising a fan mechanism, a connecting piece and at least one driving mechanism; the fan mechanism has an air inlet and an air outlet; the connecting piece has a first connecting port and a second connecting port in communication with the first connecting port; the second connecting port is used for being in communication with a ventilation mechanism of a seat; the connecting piece has an air inlet position and an air outlet position; when the connecting piece is in the air inlet position, the first connecting port is in communication with the air inlet, so that air flow in the ventilation mechanism flows from the air inlet to the fan mechanism and is discharged from the air outlet; when the connecting piece is in the air outlet position, the first connecting port is in communication with the air outlet, so that air flow in the fan mechanism flows to the ventilation mechanism; through the above structure, passenger comfort can be improved, and the space occupancy rate of the structure is low and control is facilitated.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of seat ventilation, in particular to a fan for seat ventilation. BACKGROUND

[0002] With the development of science and technology in the field of vehicle transportation, people have higher and higher requirements for the comfort of vehicle seats. Because the human body is in close contact with the seat, the air does not circulate, which is not conducive to the discharge of sweat, making the human body feel uncomfortable. The ventilation function effectively improves the air circulation between the human body and the seat, making the human body feel dry and comfortable.

[0003] In the prior art, a ventilation function is usually integrated on a seat, and a ventilation mechanism is used to blow air to the surface of the seat or to suck air from the surface of the seat to achieve cooling and air circulation. However, in the blowing mode, it is easy to blow cold and wet air to the human body, and long-term use can cause discomfort in the waist and back of the human body; in the air suction mode, the cooling efficiency is low, and it takes a long time to achieve the cooling effect; a single fan cannot be arranged in both blowing and suction modes on a seat. SUMMARY

[0004] In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a fan for seat ventilation that can solve the above-mentioned technical problems.

[0005] The present application provides a fan for seat ventilation, comprising:

[0006] a fan mechanism having an air inlet for absorbing air volume and an air outlet for discharging air volume;

[0007] a connecting piece having a first connecting port and a second connecting port in communication with the first connecting port; the second connecting port is used to communicate with the ventilation mechanism of the seat; the connecting piece has an air inlet working position and an air outlet working position; when the connecting piece is in the air inlet working position, the first connecting port 31 is in communication with the air inlet 1, so that the airflow in the ventilation mechanism flows from the air inlet 1 to the fan mechanism and is discharged from the air outlet 2; when the connecting piece 3 is in the air outlet working position, the first connecting port 31 is in communication with the air outlet 2, so that the airflow in the fan mechanism flows to the ventilation mechanism;

[0008] at least one driving mechanism connected with the connecting piece for driving the connecting piece to switch to the air inlet working position or the air outlet working position.

[0009] According to the technical scheme provided by the present application, the fan mechanism comprises:

[0010] a housing, the air inlet and the air outlet are arranged on the housing;

[0011] A plurality of fan blades are arranged in the housing; each of the fan blades has an air inlet portion and an air outlet portion, the air inlet portion and the air inlet are connected to form an air inlet channel, and the air outlet portion and the air outlet are connected to form an air outlet channel.

[0012] When the connecting piece is in the air inlet position, the first connecting port is moved to a position opposite to the air inlet; when the connecting piece is in the air outlet position, the first connecting port is moved to a position opposite to the air outlet.

[0013] According to the technical scheme provided in the application, the housing comprises a lower housing, an intermediate housing and an upper housing arranged in sequence.

[0014] The fan blades are arranged on the lower housing, and the lower housing, the air outlet portion of the fan blades and the bottom of the intermediate housing form the air outlet channel.

[0015] The intermediate housing is provided with a hole communicating with the air inlet portion of the fan blades; and the upper housing and the intermediate housing form the air inlet channel.

[0016] According to the technical scheme provided in the application, the air inlet and the air outlet are arranged in a straight line, the driving mechanism comprises a second driving device arranged on the fan mechanism, and the second driving device drives the first connecting piece to slide along the straight line to adjust the communication between the first connecting piece and the air inlet or the air outlet.

[0017] According to the technical scheme provided in the application, the fan mechanism is provided with a mounting groove along the arrangement direction of the air inlet and the air outlet; and the second driving device is arranged in the mounting groove.

[0018] According to the technical scheme provided in the application, the edges of the air inlet and the air outlet are arranged in an arc line, the driving structure comprises a first driving device arranged on the fan mechanism, and the first driving device drives the first connecting piece to rotate along the arc line to adjust the communication between the first connecting piece and the air inlet or the air outlet.

[0019] According to the technical scheme provided in the application, the first connecting piece is provided with a rack structure, and the first driving device and the rack structure are connected through a worm gear and a worm.

[0020] According to the technical scheme provided in the application, the fan mechanism is provided with a sliding groove, and the first connecting piece is slidably arranged in the sliding groove.

[0021] According to the technical scheme provided in the application, the driving mechanism is arranged on the housing through a fastener or a clamping piece.

[0022] According to the technical solution provided in this application, the drive mechanism includes at least one of a motor, a cylinder, an airbag body, and a shape memory alloy.

[0023] The beneficial effects of this application are as follows: Based on the technical solution provided in this application, by controlling the drive mechanism to switch the connector to the air inlet position, the first connection port is connected to the air inlet; the fan mechanism is turned on, and the system is in suction mode, that is, the humid and cold air on the side of the seat closest to the human body is discharged to the side of the seat away from the human body through the seat's ventilation mechanism, air inlet, and air outlet; then, the drive mechanism is controlled to switch the connector to the air outlet position, and the first connection port is connected to the air outlet, at which point the system switches to blowing mode, that is, the air on the side of the seat away from the human body is introduced to the seat surface through the air inlet, air outlet, and ventilation mechanism, thereby improving the air circulation between the seat surface and the human body. This helps to avoid discomfort to the human body (especially the lower back) and improves passenger comfort. In addition, the system can also continuously switch between suction mode and blowing mode during the above process (controlling the connector to continuously switch between the air inlet and air outlet positions), further preventing humid and cold air from immersing in the human body for a long time. Meanwhile, the fan for seat ventilation provided in this application switches the airflow relationship between the fan mechanism input and output and the seat ventilation mechanism through the cooperation of the fan mechanism, connector and drive mechanism. Only one fan mechanism is needed to realize the suction and blowing functions. It has a simple structure, low space occupation and is easy to control. Attached Figure Description

[0024] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 A schematic diagram of a fan for seat ventilation provided in this application;

[0026] Figure 2 for Figure 1 The diagram shows the structure of the connector 3 connected to the air inlet 1.

[0027] Figure 3 for Figure 1 The diagram shows the structure of the connector 3 connected to the air outlet 2.

[0028] Figure 4 for Figure 1 An exploded view of a fan used for seat ventilation is shown.

[0029] Figure 5 for Figure 4 A magnified view of part D shown;

[0030] Figure 6 for Figure 4Structure schematic view of the intermediate casing 52 shown;

[0031] Figure 7 For Figure 3 Structure schematic view of the installation slot 4 shown arranged in a central position;

[0032] Figure 8 For Figure 7 Structure schematic view of the connecting piece 3 shown switched to communicate with the air inlet 1;

[0033] Figure 9 For Figure 7 Exploded view of the fan for ventilation of the seat shown;

[0034] Figure 10 Structure schematic view of the fan for ventilation of the seat with rotating blowing and suction structure shown;

[0035] Figure 11 For Figure 10 Structure schematic view of the connecting piece 3 shown switched to communicate with the air inlet 1;

[0036] Figure 12 For Figure 10 Exploded view of the fan for ventilation of the seat shown;

[0037] Figure 13 For Figure 12 Structure schematic view of the rack structure 33 shown;

[0038] Figure 14 For Figure 1 Structure schematic view of the fan for ventilation of the seat provided with the air bag 8 shown;

[0039] Figure 15 For Figure 1 Structure schematic view of the fan for ventilation of the seat mounted on the seat body 10 shown;

[0040] Figure 16 For Figure 15 Partial enlarged view of the C portion shown;

[0041] Figure 17 For Figure 15 Structure schematic view of the connecting piece 3 shown switched to the air outlet work station;

[0042] Figure 18 For Figure 17 Partial enlarged view of the B portion shown;

[0043] Reference numerals in the figures:

[0044] 1, air inlet; 2, air outlet; 3, connecting piece; 31, first connecting port; 32, second connecting port; 33, rack structure; 34, worm wheel; 35, worm; 4, mounting groove; 5, shell; 51, lower shell; 510, sliding groove; 52, middle shell; 520, hole; 521, lower recess; 53, upper shell; 6, fan blade; 61, air inlet part; 62, air outlet part; 610, air inlet channel; 620, air outlet channel; 71, first motor; 72, mounting space; 73, upper plate; 74, second motor; 75, screw rod; 76, sliding block; 77, drive shell; 78, guide rod; 79, matching structure; 8, air bag; 81, air hole; 9, second driving device; 10, seat body; 101, through hole; 11, pipeline. DETAILED DESCRIPTION

[0045] The application will be further described below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are intended to be illustrative only and not limiting of the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for the convenience of description.

[0046] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0047] Please refer to Figures 1-13 A structure diagram of a fan for ventilating a seat is provided in the application, comprising:

[0048] A fan mechanism, the fan mechanism having an air inlet 1 for absorbing air volume and an air outlet 2 for discharging air volume;

[0049] A connecting piece 3, the connecting piece 3 having a first connecting port 31 and a second connecting port 32 in communication with the first connecting port 31; the second connecting port 32 is used for being in communication with a ventilation mechanism of the seat; the connecting piece 3 has an air inlet working position and an air outlet working position; when the connecting piece 3 is in the air inlet working position, the first connecting port 31 is in communication with the air inlet 1, so that the air flow in the ventilation mechanism flows from the air inlet 1 to the fan mechanism and is discharged from the air outlet 2; when the connecting piece 3 is in the air outlet working position, the first connecting port 31 is in communication with the air outlet 2, so that the air flow in the fan mechanism flows to the ventilation mechanism;

[0050] At least one driving mechanism, the driving mechanism being connected with the connecting piece 3, for driving the connecting piece 3 to switch to the air inlet working position or the air outlet working position.

[0051] In some application scenarios, the ventilation mechanism comprises, for example, a ventilation structure (such as a ventilation bag or a ventilation groove) arranged on the surface of the seat and a guide air passage arranged in the seat and in communication with the ventilation structure, the guide air passage being in communication with the second connecting port 32; when the fan for seat ventilation is working, the air circulation between the human body and the seat can be improved, so that the human body remains dry and comfortable; for example, as shown in Figure 14 The ventilation mechanism is a ventilation bag 8, the ventilation bag 8 is connected with the connecting piece 3, and a ventilation hole 81 is arranged on the ventilation bag 8;

[0052] In order to facilitate the understanding of those skilled in the art, Figures 15-18 A schematic diagram of the fan for seat ventilation provided by the present application is shown in the figure; as shown in Figures 15-16 When the connecting piece 3 is in the air inlet working position, the air flow enters the fan mechanism through the through hole 101 on the seat body 10, the ventilation hole 81 of the air bag 8 and the pipeline 11 in sequence; as shown in Figures 17-18 When the connecting piece 3 is in the air outlet working position, the air flow in the fan mechanism passes through the pipeline 11 and the ventilation hole 81 of the air bag 8 in sequence and is finally output through the through hole 101 of the seat body 10.

[0053] In some application scenarios, the second connecting port 32 is connected with the ventilation mechanism of the seat through a pipeline;

[0054] For example, the pipeline is connected by a plurality of connection units in sequence, a sealing layer is formed outside the connection unit, the sealing layer allows the air flow to flow in the pipeline, a wind path is arranged in the middle of the connection unit, and hinge structures are arranged at both ends of the connection unit, the hinge structures are used for hingedly connecting adjacent connection units, and the plurality of connection units are hingedly connected in sequence, so that a chain air duct is formed between the wind paths.

[0055] For example, the pipeline is a flexible tubular structure, such as a corrugated pipe or a rubber pipe.

[0056] In some application scenarios, the driving mechanism is installed on the housing 5 at the driving end and connected with the connecting piece 3 at the driven end; in other application scenarios, the driving end and the driven end of the driving mechanism can also be interchanged.

[0057] In the prior art, the ventilation function is usually integrated on the seat, and the ventilation mechanism is used to blow air to the surface of the seat or to suck air from the surface of the seat to achieve cooling and air circulation. However, in the blowing mode, it is easy to blow the cold and wet air to the human body, and the human body is prone to discomfort in the waist and back after long-term use; in the air suction mode, the cooling efficiency is low, and it takes a long time to achieve the cooling effect; a single fan cannot be arranged in the blowing and suction modes at the same time on the seat.

[0058] Based on this, the inventors of the case have developed a fan for seat ventilation, which first discards the traditional ventilation mode (i.e. single blowing, sucking air mode), but combines the blowing and sucking air mode, and in the use process, the fan first performs the air suction treatment, so that the wet and cold air is discharged, and then the air blowing is performed, to avoid the discomfort of the human body; secondly, the structure is optimized, so that the fan has the functions of air suction and air blowing, and has the advantages of simple and ingenious structure, low space occupancy, and convenient control.

[0059] In order to facilitate the understanding of those skilled in the art, the working principle of the fan for seat ventilation provided in the present application is as follows:

[0060] By controlling the driving mechanism to drive the connecting piece 3 to switch to the air inlet working position, the first connecting port 31 is in communication with the air inlet 1 at this time; the fan mechanism is turned on, and the system is in the air suction mode (as shown in Figure 2 、 Figure 8 、 Figure 11 indicated) that is, the wet and cold air on the side of the seat close to the human body surface is discharged to the side of the seat away from the human body surface through the ventilation mechanism of the seat, the air inlet 1 and the air outlet 2; then, the driving mechanism is controlled to drive the connecting piece 3 to switch to the air outlet working position, and the first connecting port 31 is in communication with the air outlet 2 at this time, and the system is switched to the air blowing mode (as shown in Figure 3 、 Figure 7 、 Figure 10 indicated), that is, the air on the side of the seat away from the human body surface is introduced to the surface of the seat through the air inlet 1, the air outlet 2 and the ventilation mechanism, thereby improving the air circulation between the surface of the seat and the human body. Thus, it is beneficial to avoid the discomfort of the human body (especially for the waist and back), and to improve the comfort of the passenger. In addition, the system can also be controlled to continuously switch between the air suction mode and the air blowing mode (the connecting piece is continuously switched between the air inlet working position and the air outlet working position) in the above process, to further avoid the long-term immersion of the wet and cold air into the human body. At the same time, in the fan for seat ventilation provided in the present application, the fan mechanism, the connecting piece 3 and the driving mechanism cooperate with each other to switch the air path relationship between the fan mechanism input and the seat ventilation mechanism output, so that the air suction and blowing functions can be realized by only one fan mechanism, and the structure is simple, the space occupancy is low, and the control is convenient.

[0061] In some embodiments, the fan mechanism comprises:

[0062] The housing 5, the air inlet 1 and the air outlet 2 are arranged on the housing;

[0063] The fan blade 6 is installed in the housing 5; the fan blade 6 has an air inlet portion 61 and an air outlet portion 62, an air inlet channel 610 is formed between the air inlet portion 61 and the air inlet 1, and an air outlet channel 620 is formed between the air outlet portion 62 and the air outlet 2;

[0064] When the connecting piece 3 is in the air inlet position, the first connecting port 31 moves to a position opposite the air inlet 1; when the connecting piece 3 is in the air outlet position, the first connecting port 31 moves to a position opposite the air outlet 2.

[0065] Specifically, the fan blade 6 is in a ring structure, the inner ring of the fan blade serves as the air inlet part 61, and the outer ring of the fan blade serves as the air outlet part 62; gas enters the fan blade 6 through the air inlet part 61 and is then discharged through the air outlet part 62.

[0066] In some embodiments, the shell 5 includes a lower shell 51, an intermediate shell 52, and an upper shell 53 arranged in sequence (as shown in Figure 4 、 Figure 9 、 Figure 12 indicated);

[0067] The fan blade 6 is installed on the lower shell 51, and the lower shell 51, the air outlet part 62 of the fan blade 6, and the bottom of the intermediate shell 52 form the air outlet channel 620;

[0068] The intermediate shell 52 is provided with a hole 520 that communicates with the air inlet part 61 of the fan blade 6; and the upper shell 53 and the intermediate shell 52 form the air inlet channel 610.

[0069] Specifically, the lower shell 51, the intermediate shell 52, and the upper shell 53 can be in a split structure and be fixedly connected through a detachable structure (such as a buckle, a screw connection, etc.), or can be in an integrated structure and be integrally formed.

[0070] Specifically, the air inlet 1 can be arranged between the upper shell 53 and the intermediate shell 52, and the air outlet 2 can be arranged between the intermediate shell 52 and the lower shell 51; the cross-sectional area of the air inlet 1 is greater than that of the air outlet 2; in addition, the positions of the air inlet 1 and the air outlet 2 can also be arranged according to actual needs, for example, a guide joint can also be installed at the air inlet 1 and the air outlet 2 to adjust the positions of the air inlets and outlets, so as to adapt to the position switching mode of the connecting piece 3 and facilitate the driving mechanism to drive the connecting piece 3 to switch the air path state.

[0071] Preferably, as shown in Figure 6 indicated, the intermediate shell 52 is provided with a lower recess 521 of 1-5 mm at the bottom position corresponding to the air inlet 1, for changing the air direction and balancing the proportional relationship between the cross-sectional areas of the air inlets and outlets.

[0072] In some embodiments, as shown in Figures 2-9As shown, the air inlet 1 and air outlet 2 are arranged in a straight line. The driving mechanism includes a second driving device 9 disposed on the fan mechanism. The second driving device 9 drives the connecting member 3 to slide in a straight line to adjust the connection between the connecting member 3 and the air inlet 1 or the air outlet 2.

[0073] Specifically, the second driving device 9 has a driving end, which is used to drive the connector 3 to move along the arrangement direction of the air inlet 1 and the air outlet 2; when the connector 3 moves to the position of the air inlet 1, the air inlet 1 is connected to the connector 3; when the connector 3 moves to the position of the air outlet 2, the air outlet 2 is connected to the connector 3.

[0074] Specifically, the second drive device 9 is, for example, a linear motor, a cylinder, an airbag, or a shape memory alloy.

[0075] Furthermore, such as Figure 5 As shown, the second driving device 9 includes a second motor 74, a lead screw 75 connected to the output end of the second motor 74, and a slider 76 threadedly connected to the lead screw 75; the connecting member 3 is provided with a mating structure 79 that cooperates with the slider 16.

[0076] Furthermore, the second motor 74 is mounted on the drive housing 77, and a guide rod 78 is provided on the drive housing 77 in a direction parallel to the lead screw 75, and the slider 76 is slidably mounted on the guide rod 78.

[0077] In this embodiment, the housing 5, the connector 3, and the second driving device 9 together form a sliding blowing and suction structure. By driving the connector 3 to extend and slide, its position relative to the air inlet 1 and the air outlet 2 can be adjusted, thereby switching the connector 3 to the air inlet position or the air outlet position.

[0078] In some embodiments, the fan mechanism is provided with a mounting groove 4 along the arrangement direction of the air inlet 1 and the air outlet 2; the second drive device 9 is disposed in the mounting groove 4.

[0079] Specifically, such as Figures 7-9 As shown, the mounting groove 4 is positioned through the middle of the air inlet 1 and the air outlet 2; the fixed end of the second drive device 9 is fixedly installed in the mounting groove 4. In other examples, the mounting groove 4 can also be installed in other positions of the fan mechanism according to actual needs, such as on both sides of the air inlet 1 and the air outlet 2, as shown. Figures 2-5 As shown.

[0080] In some embodiments, such as Figures 10-13As shown, the edges of the air inlet 1 and the air outlet 2 are arranged along an arc line, and the driving structure comprises a first driving device arranged on the fan mechanism, which drives the connecting piece 3 to rotate along the arc line to adjust the communication between the connecting piece 3 and the air inlet 1 or the air outlet 2.

[0081] Specifically, the shell 5, the connecting piece 3 and the first driving device form a rotating air blowing and sucking structure, the first driving device is mounted on the shell 5, the output end of the first driving device is connected with the connecting piece 3, the rotation of the connecting piece 3 is driven to adjust the position of the connecting piece 3 relative to the air inlet 1 and the air outlet 2, and then the connecting piece 3 is switched between the air inlet position and the air outlet position.

[0082] In some embodiments, the connecting piece 3 is provided with a rack structure 33, and the first driving device is in transmission connection with the rack structure 33 through a worm wheel 34 and a worm 35.

[0083] Specifically, the first driving device is selected as a first motor 71, the output end of the first motor 71 is provided with a worm 35, the worm 35 is in transmission connection with the rack structure 33 through the worm 35, the fan mechanism is provided with a groove, an upper plate 73 is detachably mounted on the groove, an installation space 72 for mounting the first motor 71 is formed between the upper plate and the groove, one side of the groove is provided with an opening, the worm wheel 34 and the worm 35 are connected with the rack structure 33 through the opening.

[0084] In some embodiments, as shown in the drawings, Figure 12 As shown, the fan mechanism is provided with a sliding groove 510, and the connecting piece 3 is slidably arranged in the sliding groove 510.

[0085] In some embodiments, the driving mechanism is mounted on the shell 5 through a fastener or a clamping piece.

[0086] In some embodiments, the driving mechanism comprises at least one of a motor, an air cylinder, an air bag body and a memory alloy.

[0087] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. It should be understood by those skilled in the art that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and also covers 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 the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. A fan for seat ventilation, characterized in that, The application relates to a ventilation device for a seat, comprising: a fan mechanism having an air inlet (1) for absorbing air and an air outlet (2) for discharging air; a connecting piece (3) having a first connecting port (31) and a second connecting port (32) in communication with the first connecting port (31); the second connecting port (32) is used for being in communication with a ventilation mechanism of the seat; the connecting piece (3) has an air inlet working position and an air outlet working position; when the connecting piece (3) is in the air inlet working position, the first connecting port (31) is in communication with the air inlet (1), so that air flow in the ventilation mechanism flows from the air inlet (1) to the fan mechanism and is discharged from the air outlet (2); when the connecting piece (3) is in the air outlet working position, the first connecting port (31) is in communication with the air outlet (2), so that air flow in the fan mechanism flows to the ventilation mechanism; at least one driving mechanism connected with the connecting piece (3) and used for driving the connecting piece (3) to switch to the air inlet working position or the air outlet working position; the air inlet (1) and the air outlet (2) are arranged in a linear shape, and the driving mechanism comprises a second driving device (9) arranged on the fan mechanism; the second driving device (9) drives the connecting piece (3) to slide along the linear shape, so as to adjust the communication between the connecting piece (3) and the air inlet (1) or the air outlet (2); alternatively, the edges of the air inlet (1) and the air outlet (2) are arranged in an arc shape, and the driving mechanism comprises a first driving device arranged on the fan mechanism; the first driving device drives the connecting piece (3) to rotate along the arc shape, so as to adjust the communication between the connecting piece (3) and the air inlet (1) or the air outlet (2).

2. The fan for seat ventilation according to claim 1, characterized in that, The fan mechanism comprises: a shell (5) on which the air inlet (1) and the air outlet (2) are arranged; a fan blade (6) installed in the shell (5); the fan blade (6) has an air inlet part (61) and an air outlet part (62); an air inlet channel (610) is formed between the air inlet part (61) and the air inlet (1), and an air outlet channel (620) is formed between the air outlet part (62) and the air outlet (2); when the connecting piece (3) is in the air inlet working position, the first connecting port (31) moves to a position opposite to the air inlet (1); when the connecting piece (3) is in the air outlet working position, the first connecting port (31) moves to a position opposite to the air outlet (2).

3. The fan for seat ventilation according to claim 2, wherein The shell (5) comprises a lower shell (51), an intermediate shell (52) and an upper shell (53) arranged in sequence; the fan blade (6) is installed on the lower shell (51), and the lower shell (51), the air outlet part (62) of the fan blade (6) and the bottom of the intermediate shell (52) form the air outlet channel (620). The intermediate shell (52) is provided with a hole (520) in communication with the air inlet part (61) of the fan blade (6); the upper shell (53) and the intermediate shell (52) form the air inlet channel (610).

4. The fan for seat ventilation of claim 1, wherein, When the air inlets (1) and air outlets (2) are arranged in a linear form, the fan mechanism is provided with a mounting groove (4) along the arrangement direction of the air inlets (1) and air outlets (2); the second driving device (9) is arranged in the mounting groove (4).

5. The fan for seat ventilation of claim 1, wherein, When the edges of the air inlets (1) and air outlets (2) are arranged in an arcuate form, the connecting piece (3) is provided with a rack structure (33), and the first driving device is drivingly connected with the rack structure (33) through a worm wheel (34) and a worm (35).

6. The fan for seat ventilation of claim 1, wherein, The fan mechanism is provided with a sliding groove (510), and the connecting piece (3) is slidably arranged in the sliding groove (510).

7. The fan for seat ventilation of claim 2, wherein, The driving mechanism is mounted on the shell (5) through a fastener or a clamping piece.

8. A fan for ventilating a seat according to any one of claims 1 to 7, characterized in that, The driving mechanism comprises at least one of a motor, an air cylinder, an air bag body and a memory alloy.

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