Air duct switching mechanism and ventilation filtering device

By designing the air duct switching mechanism, using electric push rods to drive the seal plate to rotate, combined with arcuate guide plates and electromagnets, the problem of slow response of the vehicle ventilation and filtering device is solved, fast air duct switching and high sealing are achieved, and it is suitable for a variety of usage scenarios and reduces maintenance costs.

CN223266579UActive Publication Date: 2025-08-26HEFEI TONGZHI ELECTRICAL CONTROL TECH
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Patent Information

Application Number
CN202422630551.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-29
Publication Date
2025-08-26
Estimated Expiration
2034-10-29

AI Technical Summary

Technical Problem

The existing vehicle ventilation and filtration devices respond slowly when closing the valve quickly, which cannot meet the needs of different usage scenarios, and the filter material replacement and maintenance are inconvenient.

Method used

An air duct switching mechanism is designed, including a box, a sealing plate and a driving member. The sealing plate is driven to rotate through an electric push rod to achieve switching between the first air duct and the second air duct. Combining the arc guide plate and the electromagnet to improve stability, and using a sealing gasket to enhance sealing.

Benefits of technology

It realizes fast-responsive air duct switching, which is suitable for different usage scenarios, improves the stability and sealing of the ventilation and filtering device, and reduces maintenance costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The air duct switching mechanism comprises a box body, a sealing plate and a driving part, the box body is provided with an input port and two output ports, the input port and the two output ports form a first air duct and a second air duct respectively, the box body is further rotationally connected with the sealing plate, and the driving part is connected with the sealing plate. A driving part is further arranged in the box body and can drive the sealing plate to rotate relative to the box body and enable the first air channel to be opened and the second air channel to be closed or enable the second air channel to be opened and the first air channel to be closed. According to the switching mechanism, the driving piece can drive the first air duct to be opened and the second air duct to be closed or drive the second air duct to be opened and the first air duct to be closed, so that the switching mechanism can be used in different use scenes, for example, conventional ventilation passes through the first air duct, and unconventional ventilation passes through the second air duct.
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Description

Technical Field

[0001] The utility model relates to the technical field of ventilation equipment, and more specifically to an air duct switching mechanism and a ventilation filtering device. Background Art

[0002] Currently, most vehicle ventilation and filtration systems on the market consist of a drive fan, air duct, and valve blades. The drive fan provides power to the airflow, forcing it to flow in a desired direction. The air duct is typically equipped with a filter (typically an air conditioning filter) to initially filter dust from the air entering the vehicle. The valve blades are typically driven by a motor, whose forward and reverse rotation controls the movement of the blades, thereby opening and closing the air vents.

[0003] Traditional air conditioning filters are generally divided into six categories based on their material: pure non-woven fabric, bamboo fiber, cold catalyst, activated carbon, nano-mineral crystal, and Hemanpu. Pure non-woven fabric has poor filtering performance; bamboo fiber and cold catalyst cannot filter harmful gases; activated carbon, nano-mineral crystal, and Hemanpu are expensive and difficult to install; and the filter element also requires regular replacement and maintenance. When the valve device needs to be closed, the central control system first receives the action request. The system sends an action command to the motor based on the request. After receiving the command, the motor begins to move, finally achieving the purpose of closing the valve. In this process, from the system receiving the command to issuing the command, and then to the motor receiving the command, the motor action requires response time, resulting in a slow valve response, which cannot meet the requirements of fast closure and different usage scenarios. Utility Model Content

[0004] The technical problem to be solved by the present invention is how to provide an air duct switching mechanism suitable for different application scenarios.

[0005] The present utility model solves the above-mentioned technical problems through the following technical means: a duct switching mechanism, including a box body, a sealing plate, and a driving member, the box body is provided with an input port and two output ports, the input port and the two output ports respectively form a first duct and a second duct, the box body is also rotatably connected to a sealing plate, and the box body is also provided with a driving member, the driving member can drive the sealing plate to rotate relative to the box body and cause the first duct to open and the second duct to close, or the second duct to open and the first duct to close.

[0006] The driving member can drive the first air duct to open, the second air duct to close, or the second air duct to open, the first air duct to close, so that the switching mechanism can be used in different usage scenarios, such as conventional ventilation through the first air duct and unconventional ventilation through the second air duct.

[0007] As a preferred technical solution, the driving member includes an electric push rod, the telescopic end of the electric push rod is transmission-connected to the sealing plate through a connecting rod, one end of the connecting rod is rotationally connected to the telescopic end of the electric push rod, and the other end of the connecting rod is rotationally connected to the sealing plate through a connecting support.

[0008] A support is fixedly connected to the box body, and a limit block is provided on the support. One end of the sealing plate located in the box body is fixedly connected to an arc-shaped guide plate, and a guide groove adapted to the limit block is provided on the arc-shaped guide plate.

[0009] The arc-shaped guide plate can guide and buffer the rotation of the sealing plate, thereby improving the stability of the sealing plate rotation.

[0010] As a preferred technical solution, the support member includes an electromagnet, and the end of the arc-shaped guide plate facing away from the sealing plate is provided with a magnetic suction plate adapted to the electromagnet.

[0011] As a preferred technical solution, the sealing plate is rotatably connected to the box body via a rotating shaft, and the projection of the sealing plate on a plane where the output port is located can completely cover the opening of the output port.

[0012] As a preferred technical solution, a position sensor is further provided on the sealing plate, and a baffle adapted to the sealing plate is further provided in the box body.

[0013] As a preferred technical solution, a second sealing gasket is provided at one end of the sealing plate connected to the inner wall of the box body.

[0014] As an optimal technical solution, a closed cavity structure is provided in the box body, and air vent 1, air vent 2, and air vent 4 are opened on the box body. Air vent 4 forms the input port, and air vent 1 and air vent 2 form the output port.

[0015] A ventilation and filtering device including the above-mentioned air duct switching mechanism includes a fan, an air duct, and a filter absorber. The output end of the fan is connected to the input port of the air duct switching mechanism. One output port of the air duct switching mechanism is connected to the filter absorber through the air duct. The filter absorber is provided with an air outlet three.

[0016] As a preferred technical solution, a second mounting member and a third mounting member are provided on the filter absorber, and a first sealing gasket is provided at one end of the air duct switching mechanism connected to the fan and the air duct.

[0017] The beneficial effects of the present invention are:

[0018] (1) In the present invention, the driving member can drive the first air duct to open and the second air duct to close, or the second air duct to open and the first air duct to close, so that the switching mechanism can be used in different usage scenarios, such as conventional ventilation through the first air duct and unconventional ventilation through the second air duct.

[0019] (2) In the present invention, the arc-shaped guide plate can guide and buffer the rotation of the sealing plate, thereby improving the stability of the sealing plate rotation. By setting the electromagnet and the magnetic suction plate, the stability of the sealing is ensured when the sealing plate rotates to block one of the output ports.

[0020] (3) In the present invention, the provision of the first sealing gasket improves the sealing performance of the ventilation and filtering device, and the provision of the second sealing gasket improves the sealing performance of the air duct switching mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the main structure provided by an embodiment of the utility model;

[0022] Figure 2 A side view schematic diagram of the structure provided by an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of a top view of the structure provided by an embodiment of the utility model;

[0024] Figure 4 The embodiment of the present utility model provides Figure 3 Schematic diagram of the cross-section structure;

[0025] Figure 5 A schematic diagram of the structure of an air outlet provided in an embodiment of the present utility model;

[0026] Figure 6 A schematic diagram of the structure of the second tuyere provided in an embodiment of the present utility model;

[0027] Figure 7 A schematic diagram of the internal structure of the box provided in an embodiment of the present utility model;

[0028] Figure 8 A schematic diagram of the electromagnet structure provided in an embodiment of the present utility model;

[0029] Figure 9 A schematic diagram of the cross-sectional structure of a box body provided in an embodiment of the present utility model;

[0030] Figure 10 A schematic diagram of the sealing plate opening state provided in an embodiment of the present utility model;

[0031] Figure numbers: 1. Fan; 2. First sealing gasket; 3. Air duct switching mechanism; 4. Air duct; 5. Air duct pressure plate; 6. First mounting part; 7. Filter absorber; 8. Second mounting part; 9. Third mounting part; 10. Electric push rod; 11. Fourth mounting part; 12. Connecting rod; 13. Connecting support; 14. Magnetic suction plate; 15. Electromagnet; 16. Arc guide plate; 161. Guide groove; 162. Limit block; 17. Closing plate; 18. Second sealing gasket; 19. Position sensor; 20. Rotating shaft; 21. Box body; 22. Air outlet one; 23. Air outlet two; 24. Air outlet three; 25. Air outlet four; 26. Baffle. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the embodiments described are 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 shall fall within the scope of protection of the present invention.

[0033] See Figure 1 、 Figure 2 、 Figure 3 A ventilation and filtering device includes a fan 1, an air duct switching mechanism 3, an air duct 4, and a filter absorber 7. The input end of the fan 1 is connected to the outdoor environment, the output end of the fan 1 is connected to the input port of the air duct switching mechanism 3, and an output port of the air duct switching mechanism 3 is connected to the filter absorber 7 through the air duct 4. One end of the air duct 4 is connected to an output port of the air duct switching mechanism 3, and the other end is connected to the input end of the filter absorber 7. An air outlet three 24 is provided on the filter absorber 7, and the air outlet three 24 forms the output end of the filter absorber 7, and the air outlet three 24 is connected to the indoor environment.

[0034] See Figure 7 、 Figure 8 、 Figure 9The air duct switching mechanism 3 includes a box body 21, a sealing plate 17, and a driving member. The box body 21 is provided with an input port and two output ports. The input port and the two output ports respectively form a first air duct and a second air duct. The box body 21 is also rotatably connected to the sealing plate 17. The box body 21 is also provided with a driving member. The driving member can drive the sealing plate 17 to rotate relative to the box body 21 and cause the first air duct to open and the second air duct to close, or the second air duct to open and the first air duct to close. In this embodiment, the driving member is an electric push rod 10 as an example. The electric push rod 10 is fixedly mounted on the fourth mounting member 11. Of course, the box body 21 can also be a hydraulic cylinder or a linear module, etc., but is not limited to this; the telescopic end of the electric push rod 10 is connected to the closing plate 17 through the connecting rod 12, one end of the connecting rod 12 is rotatably connected to the telescopic end of the electric push rod 10, and the other end of the connecting rod 12 is rotatably connected to the closing plate 17 through the connecting support 13, the connecting support 13 is fixedly connected to the closing plate 17, and the connecting support 13 is rotatably connected to the other end of the connecting rod 12. The electric push rod 10, the connecting rod 12, the connecting support 13, the arc guide plate 16, and the closing plate 17 form a set of fast and stable mechanical drive structure.

[0035] See Figure 8 A support is fixedly connected to the box body 21, and a limit block 162 is provided on the support. One end of the sealing plate 17 located in the box body 21 is fixedly connected to the arc-shaped guide plate 16, and a guide groove 161 adapted to the limit block 162 is provided on the arc-shaped guide plate 16. In this embodiment, the support is an electromagnet 15, and the free end of the electromagnet 15 is fixedly connected to the limit block 162. The end of the arc-shaped guide plate 16 facing away from the sealing plate 17 is provided with a magnetic suction plate 14 adapted to the electromagnet 15. The electromagnet 15 and the magnetic suction plate 14 can attract each other, thereby providing a limit for the sealing plate 17.

[0036] See Figure 5 、 Figure 6 、 Figure 9 In this embodiment, a sealed cavity structure is provided in the box body 21, and an air outlet 1 22, an air outlet 23, and an air outlet 4 25 are opened on the box body 21. The air outlet 4 25 forms an input port, and the air outlet 1 22 and the air outlet 2 23 form an output port. The air outlet 1 22 is connected to the indoor environment. One end of the air duct 4 is fixedly connected to the input end of the filter absorber 7 through the first mounting member 6, and the other end of the air duct 4 is fixedly connected to the air outlet 23. An air duct pressure plate 5 is provided on the outside of the other end of the air duct 4. The air duct pressure plate 5 is fastened to the box body 21 by screws, and the air outlet 4 25 is fixedly connected to the fan 1.

[0037] The sealing plate 17 is rotatably connected to the box body 21 through the rotating shaft 20, and the projection of the sealing plate 17 on the plane where the air outlet 22 is located can completely cover the opening of the air outlet 22. The sealing plate 17 can also be rotatably connected to the box body 21 through a pin shaft, a hinge, etc. The sealing plate 17 is located in the cavity, and a position sensor 19 is also provided on the sealing plate 17. The position sensor 19 is located on the outside of the box body 21. The position sensor 19 is used to detect the position of the sealing plate 17; a baffle 26 adapted to the sealing plate 17 is also provided in the box body 21. The baffle 26 is located next to the opening position of the air outlet four 25 and can limit the sealing plate 17.

[0038] See Figure 3 、 Figure 8 In order to ensure the sealing of the entire device, the ends of the air duct switching mechanism connected to the fan 1 and the air duct 4 are provided with a first sealing gasket 2, and the end of the sealing plate 17 connected to the inner wall of the box body 21 is provided with a second sealing gasket 18;

[0039] It should be noted that the first mounting member 6 , the second mounting member 8 , the third mounting member 9 , and the fourth mounting member 11 are all block-shaped or plate-shaped fixed structures.

[0040] Working principle:

[0041] 1) Under normal conditions, the sealing plate 17 and the baffle 26 are in contact with each other, the first air duct is closed, and the second air duct is open. Air flows from the inlet of the fan 1 through the fan 1 and through the second air duct, directly supplying air to the indoor environment.

[0042] 2) When the outdoor air flow contains harmful gases, the sealing plate 17 is fitted with the air outlet 2 23, the first air duct is in a conducting state, and the second air duct is in a closed state. At this time, the air flow flows from the fan 1 through the first air duct, the air duct 4 to the filter absorber 7, and after filtering the harmful gases, it is introduced into the indoor environment through the air outlet 3 24.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An air duct switching mechanism, characterized in that: The invention comprises a box body (21), a sealing plate (17), and a driving member. The box body (21) is provided with an input port and two output ports. The input port and the two output ports respectively form a first air duct and a second air duct. The box body (21) is also rotatably connected to the sealing plate (17). The box body (21) is further provided with a driving member. The driving member can drive the sealing plate (17) to rotate relative to the box body (21) and cause the first air duct to open and the second air duct to close, or the second air duct to open and the first air duct to close.

2. The air duct switching mechanism according to claim 1, characterized in that: The driving member comprises an electric push rod (10), the telescopic end of the electric push rod (10) is transmission-connected to the sealing plate (17) via a connecting rod (12), one end of the connecting rod (12) is rotationally connected to the telescopic end of the electric push rod (10), and the other end of the connecting rod (12) is rotationally connected to the sealing plate (17) via a connecting support (13).

3. The air duct switching mechanism according to claim 1, characterized in that: A support member is fixedly connected to the box body (21), and a limit block (162) is provided on the support member. One end of the sealing plate (17) located inside the box body (21) is fixedly connected to an arc-shaped guide plate (16), and a guide groove (161) adapted to the limit block (162) is provided on the arc-shaped guide plate (16).

4. The air duct switching mechanism according to claim 3, characterized in that: The support member includes an electromagnet (15), and one end of the arc-shaped guide plate (16) facing away from the sealing plate (17) is provided with a magnetic suction plate (14) adapted to the electromagnet (15).

5. The air duct switching mechanism according to claim 1, characterized in that: The sealing plate (17) is rotatably connected to the box body (21) via a rotating shaft (20), and the projection of the sealing plate (17) on a plane where the output port is located can completely cover the opening of the output port.

6. The air duct switching mechanism according to claim 1, characterized in that: A position sensor (19) is also provided on the sealing plate (17), and a baffle (26) adapted to the sealing plate (17) is also provided in the box body (21).

7. The air duct switching mechanism according to claim 1, characterized in that: A second sealing gasket (18) is provided at one end of the sealing plate (17) connected to the inner wall of the box body (21).

8. The air duct switching mechanism according to claim 1, characterized in that: A sealed cavity structure is provided in the box body (21), and air vent 1 (22), air vent 2 (23), and air vent 4 (25) are provided on the box body (21). Air vent 4 (25) forms the input port, and air vent 1 (22) and air vent 2 (23) form the output port.

9. A ventilation and filtering device comprising the air duct switching mechanism according to any one of claims 1 to 8, characterized in that: The invention comprises a fan (1), an air duct (4), and a filter absorber (7); the output end of the fan (1) is connected to the input port of the air duct switching mechanism; an output port of the air duct switching mechanism is connected to the filter absorber (7) through the air duct (4); and the filter absorber (7) is provided with an air port three (24).

10. The ventilation and filtering device according to claim 9, characterized in that: The filter absorber (7) is provided with a second mounting member (8) and a third mounting member (9), and one end of the air duct switching mechanism connected to the fan (1) and the air duct (4) is provided with a first sealing gasket (2).