Cross-flow air conditioner fan structure

Abstract

The application relates to the technical field of air conditioner fan structures, and particularly discloses a cross-flow type air conditioner fan structure which comprises a fan main body, a first driving element is fixedly connected to the inner wall of the fan main body, a driving rod is installed at the output end of the first driving element, a connecting disc is fixedly connected to the front end of the driving rod, the first controller, the second controller, the wind baffle, the second driving element, the third driving element and the first driving gear are arranged, the first driving element drives the connecting disc to rotate to form a cross-flow air duct, meanwhile, the first controller and the second controller independently control the second driving element and the third driving element respectively, the second driving element is matched with the limiting hole through the limiting rod to realize the positioning locking of the wind baffle, the third driving element precisely adjusts the angle of the wind baffle through the gear transmission system, multiple wind baffles can independently adjust the inclination direction, the airflow is dispersed to different areas, the air supply range is enlarged, and the problem of local temperature unevenness is avoided through the mixing of airflow with multiple angles.

Description

Technical Field

[0001] The present invention belongs to the technical field of air-conditioning fans, and in particular relates to a cross-flow air-conditioning fan structure. Background Art

[0002] With the continuous advancement of modern building technology and people's increasing demand for indoor environmental comfort, the performance and efficiency of air-conditioning systems, as key equipment for regulating indoor temperature, humidity and air quality, have become the focus of industry attention. Cross-flow air-conditioning fans, as a highly efficient air distribution device, are widely used in various large commercial spaces, offices and residences because they can generate uniform and continuous airflow.

[0003] However, in existing cross-flow air-conditioning fan technology, a common challenge is how to achieve precise distribution of airflow and uniform air supply. In traditional designs, although the air supply direction and air volume can be changed to a certain extent by adjusting the blade angle or fan speed, these methods are often difficult to accurately control the airflow distribution in different areas, especially in large open spaces or complex layout environments. Local temperature unevenness and air supply dead spots are prone to problems, affecting the comfort of the indoor environment and the energy efficiency of the air-conditioning system. Therefore, staff need to improve it. Summary of the Invention

[0004] The object of the present invention is to provide a cross-flow air-conditioning fan structure to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A cross-flow air-conditioning fan structure, comprising:

[0007] Fan body;

[0008] A first driving member is fixedly connected to the inner wall of the fan body, a driving rod is installed at the output end of the first driving member, a connecting disk is fixedly connected to the front end of the driving rod, and a plurality of blades are arranged on the inner wall of the connecting disk in an annular shape, and the blades are rotatably connected to one side of the connecting disk;

[0009] The inner wall of the fan body is fixedly connected to a mounting frame, the inner wall of the mounting frame is fixedly connected to a distributor, the first controller and the second controller are fixedly connected on both sides of the inner wall of the mounting frame, and the first controller and the second controller are electrically connected to the distributor, the inner bottom wall of the fan body is rotatably connected to multiple sets of wind shields, one side of the wind shield is rotatably connected to a connecting rod, one end of the connecting rod is fixedly connected to a first transmission gear, and a limiting hole is provided on the inner wall of the first transmission gear, the surface of the mounting frame is fixedly connected to a second driving member, and the second driving member is electrically connected to the first controller and the distributor, the output end of the second driving member is installed with a limiting rod, and the surface of the limiting rod is inserted into the inner wall of the limiting hole, the surface of the mounting frame is located above the second driving member and is fixedly connected to a third driving member, and the third driving member is electrically connected to the second controller and the distributor, the output end of the third driving member is installed with a first transmission rod, the bottom end of the first transmission rod is fixedly connected to the first driving gear, and the bottom end of the first driving gear is meshed with the surface of the first transmission gear.

[0010] Preferably, one side of the blade is fixedly connected to a connecting rod, one end of the connecting rod is fixedly connected to the second transmission gear, and the surface of the connecting rod passes through and is inserted into the inner wall of the connecting disk.

[0011] Preferably, the inner wall of the connecting disk is fixedly connected to a fourth driving member, the output end of the fourth driving member is installed with a second transmission rod, and the surface of the second transmission rod is inserted into the inner wall of the connecting disk, and the front end of the second transmission rod is fixedly connected to a second driving gear.

[0012] Preferably, the surface of the connecting plate is rotatably connected to a connecting gear ring, and the inner gear of the connecting gear ring is meshedly connected to the surface of the second driving gear, and the outer gear of the connecting gear ring is meshedly connected to the surface of the second transmission gear.

[0013] Preferably, an air inlet is provided on the back of the fan body, an air vent is provided on the surface of the fan body, and an air outlet is provided on the bottom of the fan body below the wind shield.

[0014] Preferably, the surface of the connecting disk is fixedly connected to a fan blade, and the fan blade is arranged on the inner side of the blade, the surface of the fan blade is fixedly connected to an elastic sleeve, and the fan blade and the elastic sleeve are arranged in a ring shape on the surface of the connecting disk, the inner wall of the connecting disk is fixedly connected to multiple groups of fifth driving members, the inner side of the elastic sleeve is fixedly connected to a positioning bar, and the output end of the fifth driving member is fixedly connected to the inner side of the positioning bar.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) Through the arrangement of the fan body, the first driving member, the blades, the first controller, the second controller, the windshield, the second driving member, the third driving member and the first driving gear, the first driving member drives the connecting disk to rotate to form a cross-flow air duct. At the same time, the first controller and the second controller independently regulate the second driving member and the third driving member respectively. The second driving member realizes the positioning and locking of the windshield through the cooperation of the limit rod and the limit hole. The third driving member accurately adjusts the angle of the windshield through the gear transmission system, so that multiple windshields can independently adjust the tilt direction and disperse the airflow to different areas, which not only expands the air supply range, but also avoids the problem of local temperature unevenness through the mixing of multi-angle airflow, thereby achieving a uniform and soft air conditioning effect. At the same time, the accuracy and stability of the fan operation are ensured through the coordinated work of the mechanical transmission and the electronic control system.

[0017] (2) Through the arrangement of blades, connecting rods, second transmission gears, fourth driving members, second transmission rods, second drive gears, connecting gear rings, air inlets and air vents, each blade is fixedly connected to the second transmission gear through the connecting rod, and the fourth driving member drives the second transmission rod to drive the second drive gear to rotate, thereby realizing synchronous angle adjustment of the blades through the engagement of the connecting gear rings with all the second transmission gears. Dynamic adjustment of the blade angle can flexibly change the direction of the air flow and the distribution of the air volume. At the same time, the coordinated design of the air inlet and the air vents optimizes the suction and diffusion efficiency of the air flow, so that the fan can adapt to different working conditions, enhance the cross-flow effect, and achieve precise air supply and energy efficiency optimization, thereby ensuring the synchronization and stability of the blade adjustment and improving the overall performance of the fan.

[0018] (3) Through the arrangement of the connecting disk, fan blades, elastic sleeve, fifth drive member and positioning cross bar, the outer side of the fan blades arranged in a ring on the surface of the connecting disk is wrapped with an elastic sleeve. The fifth drive member applies radial force to the elastic sleeve through the positioning cross bar, causing it to deform to dynamically adjust the windward area and curvature of the fan blade. When a large air volume is required, the windward area is increased to increase the wind pressure. When low-noise operation is required, the curvature of the fan blade is optimized to reduce noise. The coordinated work of multiple fifth drive members realizes the precise control of the fan blade shape, which not only ensures the airflow efficiency but also reduces energy consumption and operating noise. Through the flexible deformation design of the elastic sleeve, the complexity of the traditional rigid adjustment mechanism is avoided, while ensuring the smoothness and reliability of the adjustment process, thereby improving the adaptability of the fan and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional perspective view of the present invention;

[0020] Figure 2 It is one of the three-dimensional diagrams of the present invention;

[0021] Figure 3 This is the second stereogram of the present invention;

[0022] Figure 4 A perspective view of the mounting frame of the present invention;

[0023] Figure 5 is a perspective view of the second driving member of the present invention;

[0024] Figure 6 A perspective view of the distributor of the present invention;

[0025] Figure 7 is a three-dimensional diagram of a blade of the present invention;

[0026] Figure 8 A perspective view of a connecting gear ring according to the present invention;

[0027] Figure 9 A three-dimensional diagram of a fan blade according to the present invention;

[0028] Figure 10 is a three-dimensional diagram of the elastic sleeve of the present invention;

[0029] In the figure: 1. Fan body; 2. First driving member; 3. Driving rod; 4. Connecting plate; 5. Blade; 6. Mounting frame; 7. Distributor; 8. First controller; 9. Second controller; 10. Wind shield; 11. Connecting rod; 12. First transmission gear; 13. Limiting hole; 14. Second driving member; 15. Limiting rod; 16. Third driving member; 17. First transmission rod; 18. First driving gear; 19. Connecting rod; 20. Second transmission gear; 21. Fourth driving member; 22. Second transmission rod; 23. Second driving gear; 24. Connecting gear ring; 25. Air inlet; 26. Air vent; 27. Fan blade; 28. Elastic sleeve; 29. ​​Fifth driving member; 30. Positioning bar. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1:

[0032] See also Figures 1 to 10 As shown, a cross-flow air-conditioning fan structure includes: a fan body 1;

[0033] The inner wall of the fan body 1 is fixedly connected to a first driving member 2, the output end of the first driving member 2 is installed with a driving rod 3, the front end of the driving rod 3 is fixedly connected to a connecting disk 4, the inner wall of the connecting disk 4 is annularly provided with multiple groups of blades 5, and the blades 5 are rotatably connected to one side of the connecting disk 4;

[0034] The inner wall of the fan body 1 is fixedly connected to a mounting frame 6, the inner wall of the mounting frame 6 is fixedly connected to a distributor 7, the inner walls of the mounting frame 6 are respectively fixedly connected to a first controller 8 and a second controller 9, and the first controller 8 and the second controller 9 are electrically connected to the distributor 7. The inner bottom wall of the fan body 1 is rotatably connected to multiple groups of windshields 10, one side of the windshield 10 is rotatably connected to a connecting rod 11, one end of the connecting rod 11 is fixedly connected to a first transmission gear 12, and a limiting hole 13 is provided on the inner wall of the first transmission gear 12. The surface of the mounting frame 6 is fixedly connected to a second driving member 14, and the second driving member 14 is fixedly connected to the inner wall of the fan body 1. The driving member 14 is electrically connected to the first controller 8 and the distributor 7. A limiting rod 15 is installed at the output end of the second driving member 14, and the surface of the limiting rod 15 is inserted into the inner wall of the limiting hole 13. The surface of the mounting frame 6 is located above the second driving member 14 and is fixedly connected to the third driving member 16, and the third driving member 16 is electrically connected to the second controller 9 and the distributor 7. A first transmission rod 17 is installed at the output end of the third driving member 16, and the bottom end of the first transmission rod 17 is fixedly connected to the first driving gear 18, and the bottom end of the first driving gear 18 is meshedly connected to the surface of the first transmission gear 12.

[0035] During use, the first driving member 2 (which can be a driving motor) drives the connecting disk 4 to rotate through the driving rod 3, and the multiple groups of blades 5 arranged in a ring on the connecting disk 4 rotate accordingly to form a cross-flow air duct; the distributor 7 in the installation frame 6 supplies power to the first controller 8 and the second controller 9, which independently control the second driving member 14 (which can be an electric telescopic rod) and the third driving member 16 (which can be a servo motor) respectively. The second driving member 14 is inserted into the limiting hole 13 of the first transmission gear 12 through the limiting rod 15 to realize the positioning of the wind shield 10 after adjustment, and the three third driving members 16 respectively drive the first driving gear 18 through the first transmission rod 17, and then engage the first transmission gear 12, driving the connecting rod 11 to adjust the inclination angle of the corresponding wind shield 10, so that the three wind shields 10 can be adjusted independently to disperse the airflow to different directions, which not only expands the air supply range, but also avoids local temperature changes by mixing the airflow at multiple angles, thereby achieving a uniform and soft air conditioning effect. The accuracy and stability of the fan operation are ensured by the coordinated work of mechanical transmission and electronic control.

[0036] Example 2:

[0037] See also Figures 1 to 10As shown, one side of the blade 5 is fixedly connected to a connecting rod 19, one end of the connecting rod 19 is fixedly connected to a second transmission gear 20, and the surface of the connecting rod 19 is inserted through the inner wall of the connecting disk 4, the inner wall of the connecting disk 4 is fixedly connected to a fourth driving member 21, the output end of the fourth driving member 21 is installed with a second transmission rod 22, and the surface of the second transmission rod 22 is inserted through the inner wall of the connecting disk 4, the front end of the second transmission rod 22 is fixedly connected to the second driving gear 23, the surface of the connecting disk 4 is rotatably connected to the connecting gear ring 24, and the inner gear of the connecting gear ring 24 is meshed and connected to the surface of the second driving gear 23, and the outer gear of the connecting gear ring 24 is meshed and connected to the surface of the second transmission gear 20, an air inlet 25 is provided on the back of the fan body 1, an air vent 26 is provided on the surface of the fan body 1, and an air outlet is provided at the bottom of the fan body 1 below the wind shield 10.

[0038] During use, each blade 5 is fixedly connected to the second transmission gear 20 through the connecting rod 19, and the fourth driving member 21 (which can be a servo motor) drives the second transmission rod 22 to rotate, driving the second driving gear 23 to rotate; the second driving gear 23 is engaged with the inner gear of the connecting gear ring 24, and the outer gear of the connecting gear ring 24 is engaged with all the second transmission gears 20, thereby forming a linkage transmission structure. When the fourth driving member 21 is started, the inclination angle of all blades 5 can be synchronously adjusted through the gear transmission system to change the airflow direction and air volume distribution. The coordinated design of the air inlet 25 and the air vent 26 ensures efficient intake and uniform diffusion of the airflow. By dynamically adjusting the blade angle, it can not only enhance the cross-flow effect, but also adapt to different working conditions, achieve precise air supply and energy efficiency optimization, and ensure the synchronization and stability of blade adjustment.

[0039] Example 3:

[0040] See also Figures 1 to 10 As shown, the surface of the connecting disk 4 is fixedly connected with a fan blade 27, and the fan blade 27 is arranged on the inner side of the blade 5, the surface of the fan blade 27 is fixedly connected with an elastic sleeve 28, and the fan blade 27 and the elastic sleeve 28 are arranged in a ring shape on the surface of the connecting disk 4, and the inner wall of the connecting disk 4 is fixedly connected with multiple groups of fifth driving members 29, the inner side of the elastic sleeve 28 is fixedly connected with a positioning cross bar 30, and the output end of the fifth driving member 29 is fixedly connected to the inner side of the positioning cross bar 30.

[0041] When in use, the outer side of the fan blades 27 arranged in an annular manner on the surface of the connecting disk 4 is wrapped with an elastic sleeve 28, and the inner side of the elastic sleeve 28 is connected to the output end of the fifth driving member 29 (which can be an electric telescopic rod) through the positioning cross bar 30. When the fifth driving member 29 telescopes, it will drive the positioning cross bar 30 to apply radial tension or thrust to the elastic sleeve 28, causing the elastic sleeve 28 to deform, thereby changing the overall windward area and curved surface curvature of the fan blade 27, so that the fan blade 27 can adjust its aerodynamic shape in real time according to actual air supply requirements: increase the windward area when a large air volume is required, and optimize the curved surface curvature when low noise operation is required. The coordinated work of multiple fifth driving members 29 can achieve precise control of the shape of the fan blade 27, which not only ensures airflow efficiency but also reduces energy consumption and noise. This is achieved through the flexible deformation of the elastic sleeve 28, which avoids the complexity of the traditional rigid adjustment mechanism and ensures the smoothness and reliability of the adjustment.

[0042] Example 4:

[0043] See also Figures 1 to 10 As shown, air curtains are widely used at the entrances of large shopping malls, hotels, or office buildings to block indoor and outdoor air exchange, maintain a stable indoor temperature, and prevent the entry of dust, insects, and other objects. Traditional air curtains suffer from limited air supply range, uneven airflow distribution, and high noise levels. This makes it difficult to achieve both efficient air isolation and comfort, especially in environments with frequent traffic. The cross-flow air conditioning fan structure of the present invention significantly improves air curtain performance through multi-angle airflow adjustment, synchronous blade control, and flexible fan blade design, making it suitable for commercial venues with high traffic volume.

[0044] The crossflow air conditioning fan is embedded in the air curtain housing, with the air inlet 25 of the fan body 1 facing the interior and the air outlet facing below the door frame. When powered on, the distributor 7 supplies power to the first and second controllers 8 and 9, activating the first drive element 2 (which can be a drive motor). This, via the drive rod 3, drives the connecting plate 4 to rotate at high speed, causing the blades 5 and fan blades 27 to rotate synchronously, forming a vertically downward crossflow air curtain.

[0045] Multi-directional air supply: The first controller 8 activates three third driving members 16 (which may be servo motors), which respectively drive the first driving gear 18 to engage the first transmission gear 12, thereby driving the connecting rod 11 to adjust the inclination angle of the corresponding windshield 10. For example:

[0046] The left wind deflector is adjusted to 30 degrees, which deflects the airflow to the outside of the inlet and blocks the external cold air;

[0047] The right wind deflector is adjusted to 15° so that the airflow covers the edge of the door frame;

[0048] The middle wind deflector remains vertical to enhance the central wind pressure.

[0049] Positioning and locking: The second driving member 14 (which can be an electric telescopic rod) pushes the limiting rod 15 to insert into the limiting hole 13 of the first transmission gear 12 to fix the position of the windshield and ensure the stability of the airflow direction.

[0050] When the ambient temperature changes or the flow of people increases, the fourth drive element 21 (which can be a servo motor) starts, driving the second drive gear 23 through the second transmission rod 22, which in turn rotates the connecting gear ring 24. Because the connecting gear ring 24 meshes with all the second transmission gears 20, all blades 5 simultaneously adjust their tilt angle to 40°, increasing the airflow coverage and improving the barrier effect.

[0051] High air volume mode: The fifth driving member 29 (which can be an electric telescopic rod) contracts the positioning bar 30, causing the elastic sleeve 28 to expand outward, increasing the windward area of ​​the fan blades 27 and improving the strength of the wind curtain, which is suitable for peak hours.

[0052] Silent mode: The fifth driving member 29 extends the positioning bar 30, the elastic sleeve 28 retracts, and the curvature of the fan blade 27 slows down, reducing airflow noise, which is suitable for nighttime or quiet environments.

[0053] The multi-angle airflow from the wind deflector 10 converges below the door frame, forming a uniform mixed air curtain, avoiding the discomfort caused by localized strong winds. At the same time, the air vents 26 help draw in indoor air, which is mixed with fresh air and then sent out through the air outlet to maintain a uniform temperature.

[0054] Working principle: the first driving member in the fan body drives the connecting disk to rotate through the driving rod, and the annular blades on the connecting disk rotate accordingly to form a cross-flow air duct. At the same time, the fan blades on the inner side of the connecting disk can dynamically adjust the windward area and the curvature of the curved surface under the cooperation of the elastic sleeve and the fifth driving member to adapt to different air volumes and noise reduction requirements; the power distributor in the installation frame supplies power to the control system, and the first controller and the second controller independently regulate the second driving member and the third driving member respectively. The second driving member cooperates with the limiting hole of the first transmission gear through the limiting rod to realize the positioning and locking of the windshield, while the third driving member realizes the positioning and locking of the windshield through the third driving member. A transmission rod drives the first drive gear, which then engages the first transmission gear to drive the connecting rod to adjust the angle of the windshield, so that multiple windshields can independently adjust their tilt direction to achieve precise diversion and mixing of airflow; the angle adjustment of the blades is achieved through the fourth drive member driving the second transmission rod, which drives the second drive gear to engage with the connecting gear ring, and then the connecting gear ring and all the second transmission gears are linked to achieve synchronous angle changes of the blades to ensure uniform airflow distribution; the coordinated design of the air inlet and the air vent optimizes the airflow circulation path, while the position setting of the air outlet ensures the controllable direction of the airflow output. The entire system realizes the multi-dimensional adjustment function during the operation of the fan through the precise coordination of the mechanical transmission structure and the electronic control system, including comprehensive control of the air volume, airflow direction, air supply range and operating noise, thereby achieving the comprehensive effect of high efficiency, energy saving, uniform air supply and stable operation.

[0055] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous changes, modifications, substitutions and variations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A cross-flow air conditioning fan structure, characterized in that: include: Fan body (1); The inner wall of the fan body (1) is fixedly connected to a first driving member (2), an output end of the first driving member (2) is provided with a driving rod (3), a front end of the driving rod (3) is fixedly connected to a connecting disk (4), and the inner wall of the connecting disk (4) is provided with a plurality of groups of blades (5) in an annular shape, and the blades (5) are rotatably connected to one side of the connecting disk (4); The inner wall of the fan body (1) is fixedly connected to a mounting frame (6), the inner wall of the mounting frame (6) is fixedly connected to a distributor (7), the inner walls of the mounting frame (6) are respectively fixedly connected to a first controller (8) and a second controller (9), and the first controller (8) and the second controller (9) are electrically connected to the distributor (7), the inner bottom wall of the fan body (1) is rotatably connected to a plurality of windshield plates (10), one side of the windshield plates (10) is rotatably connected to a connecting rod (11), one end of the connecting rod (11) is fixedly connected to a first transmission gear (12), and a limiting hole (13) is provided on the inner wall of the first transmission gear (12), and the surface of the mounting frame (6) is fixedly connected to a second driving member (14). , and the second driving member (14) is electrically connected to the first controller (8) and the distributor (7), the output end of the second driving member (14) is installed with a limiting rod (15), and the surface of the limiting rod (15) is inserted into the inner wall of the limiting hole (13), the surface of the mounting frame (6) is located above the second driving member (14) and is fixedly connected with a third driving member (16), and the third driving member (16) is electrically connected to the second controller (9) and the distributor (7), the output end of the third driving member (16) is installed with a first transmission rod (17), the bottom end of the first transmission rod (17) is fixedly connected to the first driving gear (18), and the bottom end of the first driving gear (18) is meshedly connected to the surface of the first transmission gear (12); The surface of the connecting disk (4) is fixedly connected to a fan blade (27), and the fan blade (27) is arranged on the inner side of the blade (5). The surface of the fan blade (27) is fixedly connected to an elastic sleeve (28), and the fan blade (27) and the elastic sleeve (28) are arranged in a ring shape on the surface of the connecting disk (4). The inner wall of the connecting disk (4) is fixedly connected to multiple groups of fifth driving members (29). The inner side of the elastic sleeve (28) is fixedly connected to a positioning bar (30), and the output end of the fifth driving member (29) is fixedly connected to the inner side of the positioning bar (30). When the fifth driving member (29) telescopes, it drives the positioning bar (30) to apply radial tension or thrust to the elastic sleeve (28), causing the elastic sleeve (28) to deform, thereby changing the overall windward area and curved curvature of the fan blade (27).

2. A cross-flow air-conditioning fan structure according to claim 1, characterized in that: A connecting rod (19) is fixedly connected to one side of the blade (5), one end of the connecting rod (19) is fixedly connected to a second transmission gear (20), and the surface of the connecting rod (19) penetrates and is inserted into the inner wall of the connecting disk (4).

3. The cross-flow air-conditioning fan structure according to claim 1, characterized in that: A fourth driving member (21) is fixedly connected to the inner wall of the connecting disk (4), a second transmission rod (22) is installed at the output end of the fourth driving member (21), and the surface of the second transmission rod (22) is inserted into the inner wall of the connecting disk (4), and a front end of the second transmission rod (22) is fixedly connected to a second driving gear (23).

4. The cross-flow air-conditioning fan structure according to claim 1, characterized in that: The surface of the connecting disk (4) is rotatably connected to a connecting gear ring (24), and the inner gear of the connecting gear ring (24) is meshedly connected to the surface of the second drive gear (23), and the outer gear of the connecting gear ring (24) is meshedly connected to the surface of the second transmission gear (20).

5. The cross-flow air-conditioning fan structure according to claim 1, characterized in that: An air inlet (25) is provided on the back of the fan body (1), an air vent (26) is provided on the surface of the fan body (1), and an air outlet is provided on the bottom of the fan body (1) below the windshield (10).

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