Variable angle air vents in local exhaust hoods

Abstract

This utility model discloses a variable angle air vent for a partial exhaust hood, belonging to the field of exhaust hood technology. Key technical features include an exhaust structure with an adjustment mechanism bolted to its bottom. The inner side of the fixed shell is rotatably connected to the outer side of the rotating plate. The rear side of the rotating plate is bolted to the front side of the connecting member. The outer side of the connecting member is slidably connected to the inner side of the connecting block. The bottom of the connecting block is bolted to the top of the connecting rod. The right side of the connecting rod is bolted to the left side of the telescopic device. The front side of the telescopic device is bolted to the rear side of the fixed shell. In existing exhaust hoods, when the pollution source is close to the air vent, excessive airflow increases energy consumption. Conversely, when the pollution source is far away or the airflow direction changes, the fixed air vent may not effectively capture pollutants, increasing unnecessary energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of exhaust hood technology, and in particular to a variable angle air outlet for a partial exhaust hood. Background Technology

[0002] In industrial production, laboratories, and kitchens, processes generate pollutants such as dust, harmful gases, vapors, or fumes. Direct emissions can harm the health of operators, pollute the environment, and even pose safety hazards. Exhaust hoods, as local ventilation devices used to capture, control, and guide pollutants to the exhaust system, have emerged to address this need. By rationally designing the shape of the hood and the airflow organization, the negative pressure generated by the fan draws pollutants emitted from the pollution source into the hood, which then transports them through pipelines to purification equipment for treatment before they are discharged in compliance with standards. They are widely used in machining, chemical and pharmaceutical industries, and catering kitchens, and are key equipment for achieving source control of pollutants in industrial ventilation and environmental management. They are of great significance for improving the working environment, ensuring safe production, and complying with environmental regulations.

[0003] When existing exhaust hoods are in use, excessive airflow increases energy consumption when the pollution source is close to the vent, while fixed vents may not be able to effectively capture pollutants and increase unnecessary energy consumption when the pollution source is far away or the airflow direction changes.

[0004] Therefore, a variable-angle air vent for local exhaust hoods is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a variable angle air vent for a local exhaust hood, which can solve the problem that when existing exhaust hoods are used, excessive air volume will increase energy consumption when the pollution source is close to the air vent, while fixed air vents may not be able to effectively capture pollutants and increase unnecessary energy consumption when the pollution source is far away or the airflow direction changes.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a variable angle air vent for a local exhaust hood, including an exhaust structure, wherein an adjustment structure is bolted to the bottom of the exhaust structure;

[0007] The adjustment structure includes a fixed shell, a rotating plate, a connector, a connecting block, a connecting rod, and a telescopic device. The inner side of the fixed shell is rotatably connected to the outer side of the rotating plate. The rear side of the rotating plate is bolted to the front side of the connector. The outer side of the connector is slidably connected to the inner side of the connecting block. The bottom of the connecting block is bolted to the top of the connecting rod. The right side of the connecting rod is bolted to the left side of the telescopic device. The front side of the telescopic device is bolted to the rear side of the fixed shell.

[0008] Preferably, the exhaust structure includes a fixed cover, the bottom of which is bolted to and communicates with the top of the fixed shell.

[0009] Preferably, the top of the fixed cover is bolted with a connecting seat, and the top of the connecting seat is bolted with and connected to an exhaust fan.

[0010] Preferably, a protective shell is bolted to the top of the fixed cover, and the inner side of the protective shell is movably connected to the outer side of the exhaust fan.

[0011] Preferably, a fixing plate is fixedly connected to the top of the fixing cover, and the inner side of the fixing plate is inserted into the outer side of the connecting seat.

[0012] Preferably, the top of the protective shell has an installation hole, the inner wall of the installation hole is fitted with a protective mesh block, the bottom of the protective mesh block is bolted to the top of the protective shell, and the bottom of the protective mesh block is movably connected to the top of the exhaust fan.

[0013] Preferably, a fixing frame is bolted to the right side of the rear side of the fixing shell, and the inner side of the fixing frame is slidably connected to the outer side of the connecting rod.

[0014] Preferably, a mounting clip is fixedly connected to the rear side of the fixed shell, and the inner side of the mounting clip is slidably connected to the outer side of the connecting rod.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The adjustment structure set in this application uses the telescopic device as a power source to drive the connecting parts and rotating plate to rotate through the push-pull connecting rod, thereby changing the air outlet angle. The fixed shell, fixed frame and mounting clip provide guidance and limit for the rotating plate, improving the targeting and efficiency of exhaust.

[0017] 2. The exhaust structure set up in this application takes the fixed cover as the core and the connecting seat connects to the exhaust fan to form an exhaust channel. The exhaust fan provides strong suction to quickly extract pollutants; the protective shell protects the exhaust fan, collects and discharges pollutants in the local area, and improves the working environment. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the variable angle air vent of the partial exhaust hood of this utility model;

[0019] Figure 2 This is a diagram of the overall adjusting structure of this utility model;

[0020] Figure 3 This is an exploded view of the exhaust structure of this utility model;

[0021] Figure 4 This utility model Figure 1 Rear view of the overall structure;

[0022] Figure 5 This is a bottom view of the adjustable structure of this utility model;

[0023] Figure 6 This utility model Figure 5 Enlarged view of point A in the middle.

[0024] In the diagram, 1. Exhaust structure; 11. Fixed cover; 12. Connecting seat; 13. Exhaust fan; 14. Protective shell; 2. Adjustment structure; 21. Fixed shell; 22. Rotating plate; 23. Connecting piece; 24. Connecting block; 25. Connecting rod; 26. Expansion joint; 3. Fixed plate; 4. Mounting hole; 5. Protective mesh block; 6. Fixed frame; 7. Mounting clip. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-6 The present invention provides the following technical solution:

[0027] The local exhaust hood has a variable angle air outlet, including an exhaust structure 1, and an adjustment structure 2 is bolted to the bottom of the exhaust structure 1;

[0028] The adjustment structure 2 includes a fixed shell 21, a rotating plate 22, a connector 23, a connecting block 24, a connecting rod 25, and a telescopic device 26. The inner side of the fixed shell 21 is rotatably connected to the outer side of the rotating plate 22. The rear side of the rotating plate 22 is bolted to the front side of the connector 23. The outer side of the connector 23 is slidably connected to the inner side of the connecting block 24. The bottom of the connecting block 24 is bolted to the top of the connecting rod 25. The right side of the connecting rod 25 is bolted to the left side of the telescopic device 26. The front side of the telescopic device 26 is bolted to the rear side of the fixed shell 21.

[0029] In this embodiment: by setting an adjustment structure 2, the fixed shell 21 provides an installation and support platform for components such as the rotating plate 22 and the telescopic device 26. The rotating plate 22 changes the direction of the air outlet by rotating. The connecting piece 23 connects the rotating plate 22 to the connecting block 24, so that the power of the telescopic device 26 can be effectively transmitted to the rotating plate 22 to achieve the angle adjustment of the rotating plate 22. The connecting block 24 transmits the movement of the connecting rod 25 to the connecting piece 23, so that the connecting rod 25 can drive the rotating plate 22 to rotate. The telescopic device 26 serves as the power source of the adjustment structure 2. Through its telescopic movement, it pushes or pulls the connecting rod 25 to move, thereby driving the rotating plate 22 to rotate and achieving the adjustment of the air outlet angle.

[0030] Specifically, such as Figure 3 , Figure 4 , Figure 5 As shown, the exhaust structure 1 includes a fixed cover 11, the bottom of which is bolted to and connected to the top of the fixed shell 21.

[0031] Specifically, such as Figure 3 , Figure 4 , Figure 5 As shown, a connecting seat 12 is bolted to the top of the fixed cover 11, and an exhaust fan 13 is bolted to and connected to the top of the connecting seat 12.

[0032] Specifically, such as Figure 3 , Figure 4 , Figure 5 As shown, a protective shell 14 is bolted to the top of the fixed cover 11, and the inner side of the protective shell 14 is movably connected to the outer side of the exhaust fan 13.

[0033] In this embodiment: by setting up an exhaust structure 1, in which the fixed cover 11 is the core component of the exhaust structure 1, the bottom of which is bolted to and connected to the top of the fixed shell 21 to form the main exhaust channel, providing space for the collection and discharge of pollutants. The connecting seat 12 is the airflow transmission hub between the fixed cover 11 and the exhaust fan 13, providing an installation base for the exhaust fan 13. The exhaust fan 13 is the power source of the exhaust system. It generates suction through high-speed operation to extract pollutants from the fixed cover 11 and discharge them outdoors or transport them to purification equipment. The protective shell 14 protects the exhaust fan 13, preventing it from being damaged by external collisions, dust, debris, etc., and extending the service life of the exhaust fan 13.

[0034] Specifically, such as Figure 3 As shown, a fixing plate 3 is fixedly connected to the top of the fixing cover 11, and the inner side of the fixing plate 3 is inserted into the outer side of the connecting seat 12.

[0035] Specifically, such as Figure 1 , Figure 3 , Figure 5 As shown, the top of the protective shell 14 is provided with an installation hole 4, and a protective mesh block 5 is inserted into the inner wall of the installation hole 4. The bottom of the protective mesh block 5 is bolted to the top of the protective shell 14, and the bottom of the protective mesh block 5 is movably connected to the top of the exhaust fan 13.

[0036] In this embodiment: by setting the fixing plate 3, when the connecting seat 12 is installed on the top of the fixing cover 11, the fixing plate can position the installation position of the connecting seat 12 and increase the stability of the installation of the connecting seat 12. By setting the mounting hole 4 in the protective shell 14, the top of the protective shell 14 can be ventilated. The protective mesh block 5 can prevent large foreign objects from entering the interior of the exhaust fan 13, protect the blades and other key components of the exhaust fan 13 from damage, and at the same time not affect the ventilation and exhaust function of the exhaust fan 13.

[0037] Specifically, such as Figure 4 , Figure 6 As shown, a fixing frame 6 is bolted to the right side of the rear side of the fixing shell 21, and the inner side of the fixing frame 6 is slidably connected to the outer side of the connecting rod 25.

[0038] Specifically, such as Figure 2 , Figure 4 , Figure 5 As shown, a mounting clip 7 is fixedly connected to the rear side of the fixed housing 21, and the inner side of the mounting clip 7 is slidably connected to the outer side of the connecting rod 25.

[0039] In this embodiment: by setting the fixed frame 6 and the mounting clip 7 to slide with the connecting rod 25, the connecting rod 25 is guided and limited during movement, ensuring the accurate movement trajectory of the connecting rod 25, so that the rotating plate 22 can rotate at a predetermined angle.

[0040] Working principle: When the variable angle vent of this local exhaust hood is working, the exhaust structure 1 and the adjustment structure 2 work together. In the exhaust structure 1, the exhaust fan 13 is connected to the fixed hood 11 through the connecting seat 12. The high-speed operation generates suction, which draws pollutants within the area covered by the fixed hood 11 into the fixed hood 11 and discharges them to the outside or purification equipment through the connecting seat 12. The protective shell 14 and the protective net block 5 protect the exhaust fan 13 from the intrusion of external debris, ensuring its stable operation. The adjustment structure 2 is the core of realizing the change of vent angle. The telescopic device 26 serves as the power source. Through telescopic movement, it pushes or pulls the connecting rod 25 to move. The connecting rod 25 is slidably connected to the connecting block 24. Its movement will cause the connecting block 24 to slide along the outside of the connecting piece 23, thereby transmitting force. The rotating plate 22 is passed to the rotating plate 22. The rotating plate 22 rotates around the central axis of the fixed shell 21 under the drive of the connecting piece 23 through the rotating connection structure inside the fixed shell 21, thereby changing the orientation angle of the air outlet. The fixed frame 6 and the mounting clip 7 provide sliding guidance and limit for the connecting rod 25 to ensure its accurate movement trajectory and avoid deviation when the rotating plate 22 is adjusted. The operator can adjust the angle of the rotating plate 22 by controlling the extension and retraction of the telescopic device 26 according to the location of the pollution source and the airflow direction, so that the air outlet is aligned with the pollution source and the exhaust efficiency is enhanced. For example, when the location of the pollution source changes or different areas need to be covered, the exhaust direction can be quickly adjusted by simply adjusting the telescopic device 26 to change the angle of the rotating plate 22, so as to achieve directional capture of local pollution sources.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A variable angle air outlet for a local exhaust hood, comprising an exhaust structure (1), characterized in that: An adjustment structure (2) is bolted to the bottom of the exhaust structure (1); The adjustment structure (2) includes a fixed shell (21), a rotating plate (22), a connector (23), a connecting block (24), a connecting rod (25), and a telescopic device (26). The inner side of the fixed shell (21) is rotatably connected to the outer side of the rotating plate (22). The rear side of the rotating plate (22) is bolted to the front side of the connector (23). The outer side of the connector (23) is slidably connected to the inner side of the connecting block (24). The bottom of the connecting block (24) is bolted to the top of the connecting rod (25). The right side of the connecting rod (25) is bolted to the left side of the telescopic device (26). The front side of the telescopic device (26) is bolted to the rear side of the fixed shell (21).

2. The variable angle mouth of a local exhaust hood according to claim 1, characterized in that: The exhaust structure (1) includes a fixed cover (11), the bottom of which is bolted to and connected to the top of the fixed shell (21).

3. The variable angle mouth of a local exhaust hood according to claim 2, wherein: The top of the fixed cover (11) is bolted with a connecting seat (12), and the top of the connecting seat (12) is bolted with and connected to an exhaust fan (13).

4. The variable angle mouth of a local exhaust hood according to claim 3, wherein: The top of the fixed cover (11) is bolted with a protective shell (14), and the inner side of the protective shell (14) is movably connected to the outer side of the exhaust fan (13).

5. The variable angle air vent of the local exhaust hood according to claim 2, characterized in that: The top of the fixed cover (11) is fixedly connected to a fixed plate (3), and the inner side of the fixed plate (3) is inserted into the outer side of the connecting seat (12).

6. The variable angle mouth of a local exhaust hood according to claim 4, wherein: The top of the protective shell (14) is provided with an installation hole (4), and a protective mesh block (5) is inserted into the inner wall of the installation hole (4). The bottom of the protective mesh block (5) is bolted to the top of the protective shell (14), and the bottom of the protective mesh block (5) is movably connected to the top of the exhaust fan (13).

7. The variable angle mouth of a local exhaust hood according to claim 1, wherein: A fixing frame (6) is bolted to the right side of the rear side of the fixing shell (21), and the inner side of the fixing frame (6) is slidably connected to the outer side of the connecting rod (25).

8. The variable angle mouth of a local exhaust hood according to claim 1, wherein: The rear side of the fixed shell (21) is fixedly connected to the mounting clip (7), and the inner side of the mounting clip (7) is slidably connected to the outer side of the connecting rod (25).

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