Smoke exhauster with adjustable air outlet flow

Abstract

This utility model belongs to the field of smoke exhaust technology, specifically disclosing a smoke exhaust fan with adjustable outlet flow rate. It includes a housing, a protective cover installed at the center of the housing's interior, and a fan installed at the center behind the protective cover. A disc is fixed to the rear of the housing surface, and four sets of fan-shaped shells are fixed inside the disc. The sides of the fan-shaped shells have slots, and blades are movably connected to these slots. This smoke exhaust fan with adjustable outlet flow rate allows manual pre-movement of a lever at the arc-shaped slot at the top of the disc. This guides the blades connected to the lever through the slots and blocks the passageway. By guiding the blades out or in through the fan-shaped shells, the size of the disc's inlet and outlet channels is controlled, thus controlling the outlet flow rate. Furthermore, the presence of a silicone sealing strip prevents the lever from swinging on its own and also prevents gas from flowing through this area, solving the problem of inconvenient outlet flow rate adjustment.

Description

Technical Field

[0001] This utility model relates to the field of smoke exhaust technology, specifically a smoke exhaust fan with adjustable air outlet flow rate. Background Technology

[0002] A smoke exhaust fan is a device containing an air pump, fan, etc. It is usually installed at the pipe opening and can exhaust the airflow in a closed space to the outside. It can quickly disperse smoke in a short time, prevent people from inhaling smoke and suffocating or being poisoned, and also prevent indoor furnishings and objects from being contaminated.

[0003] Such smoke extraction equipment can change whether the airflow enters or exits by adjusting the direction of the internal fan rotation. However, it often lacks a flow control structure at the air outlet. Relying on adjusting the fan speed is not only costly but also requires the design of a circuit signal control mechanism, which is far less convenient than manual operation.

[0004] Now, a new type of smoke exhaust fan with adjustable air outlet flow rate is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a smoke exhaust fan with adjustable air outlet flow rate to solve the problem of inconvenient air outlet flow rate adjustment mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an adjustable exhaust fan, comprising a housing, a protective cover installed at the center of the housing, and a fan installed at the center behind the protective cover. A disc is fixed to the rear of the housing surface, and four sets of fan-shaped shells are fixed inside the disc. The sides of the fan-shaped shells are provided with slots, and blades are movably connected in the slots. Four sets of through slots are formed between the fan-shaped shells and the disc. A lever is fixedly connected at the center between the four sets of blades. An arc-shaped groove is provided on the top surface of the disc, and sealing strips are fixed at the front and rear ends of the arc-shaped groove.

[0007] As a further technical solution of this utility model, the top end of the lever is embedded in an arc-shaped groove, and the four sets of blades move in and out of the fan-shaped shell synchronously with the lever.

[0008] As a further technical solution of this utility model, a corrugated pipe is fixed to the front end of the outer shell surface, and a collar is fixed to the front of the corrugated pipe. Mounting pieces are fixed to the top and bottom ends of the collar, and positioning pieces are fixed to both sides of the collar. Guide rods are fixed to both sides of the front surface of the outer shell, and limiting sleeves are fixed to both sides of the front end of the outer shell. A slot is provided between the left and right sides inside the limiting sleeve. A baffle is laterally movably connected in the slot, and a sleeve block is fixed to the left side of the baffle.

[0009] As a further technical solution of this utility model, the positioning piece is sleeved on the outside of the guide rod, and the baffle plate moves horizontally into and out of the slot and blocks the front of the positioning piece.

[0010] As a further technical solution of this utility model, a horizontal groove is provided at the lower part of the inner shell, and a lead screw is movably connected between the left and right sides of the groove. A threaded block is threadedly connected to the outer side of the lead screw, and a wiping rod is fixed at the top of the threaded block. A motor is fixed at the lower left corner of the inner shell.

[0011] As a further technical solution of this utility model, the right side of the output shaft of the motor is fixedly connected to the lead screw, and the wiping rod moves left and right with the threaded block.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the adjustable air outlet flow rate smoke exhaust fan not only realizes the control of air outlet flow rate and adjustment of connecting pipes, but also realizes the cleaning of the protective cover; By fixing a disc to the rear of the outer shell, the disc is installed behind the fan. The lever is pre-moved at the arc groove at the top of the disc to guide the blades connected to the lever through the groove and block the front of the through groove. The size of the disc's inlet and outlet channel is controlled by leading or trailing the blades out of the fan-shaped shell, thereby controlling the airflow at the outlet. The presence of the silicone sealing strip prevents the lever from swinging on its own and also prevents gas from flowing through this point. A bellows is fixed to the front end of the outer casing. A bellows is installed at the air inlet at the front end of the outer casing. The collar is fixed to the flange of the connecting pipe or the wall. Bolts and nuts are screwed into the mounting plate for fixation. The bending state of the bellows is adjusted according to the different air inlet positions. If no connection is required, the mounting plate is pushed to the front end of the outer casing so that the positioning plate is fitted onto the guide rod. Then the sleeve is pushed so that the baffle is blocked at the front end of the guide rod to prevent the positioning plate from falling off the guide rod, so that the bellows can be folded up. By fixing a wiping rod to the top of the threaded block, the motor in the lower left corner of the housing is periodically started, thereby rotating the screw fixed to the right side of the motor output end, adjusting the position of the threaded block along the transverse groove, and forcing the wiping rod at the top of the threaded block to clean the screen in front of the protective cover. The thread on the surface of the screw is a standard trapezoidal thread, and its thread helix angle is less than the equivalent friction angle. This structure naturally has a self-locking characteristic. Moving the wiping rod to the side when the fan is working does not affect its normal operation. Attached Figure Description

[0013] Figure 1 This is a frontal cross-sectional view of the present invention. Figure 2 This is a top view cross-sectional structural diagram of the present invention; Figure 3 This is a top view of the disc structure of this utility model; Figure 4 For the present utility model Figure 1 A magnified schematic diagram of a partial cross-section at point A in the middle.

[0014] In the diagram: 1. Outer shell; 2. Sleeve block; 3. Baffle plate; 4. Limiting sleeve; 5. Slot; 6. Positioning plate; 7. Motor; 8. Horizontal slot; 9. Lead screw; 10. Threaded block; 11. Mounting plate; 12. Collar; 13. Protective cover; 14. Fan; 15. Guide rod; 16. Bellows; 17. Disc; 18. Arc groove; 19. Sealing strip; 20. Toggle lever; 21. Fan-shaped shell; 22. Blade; 23. Through groove; 24. Groove opening; 25. Wiping rod. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-4 An embodiment of this utility model provides a smoke exhaust fan with adjustable air outlet flow rate, including a housing 1, a protective cover 13 installed at the center of the interior of the housing 1, and a fan 14 installed at the center behind the protective cover 13. A disc 17 is fixed at the rear of the surface of the housing 1, and four sets of fan-shaped shells 21 are fixed inside the disc 17. The side of the fan-shaped shells 21 is provided with slots 24, and blades 22 are movably connected in the slots 24. Four sets of through slots 23 are formed between the fan-shaped shells 21 and the disc 17. A lever 20 is fixedly connected at the center between the four sets of blades 22. An arc-shaped groove 18 is provided on the top surface of the disc 17, and sealing strips 19 are fixed at the front and rear ends of the arc-shaped groove 18, respectively. The top of the lever 20 is embedded in the arc-shaped groove 18, and the four sets of blades 22 move in and out of the fan-shaped shell 21 synchronously with the lever 20. Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the disc body 17 is installed behind the fan 14. The lever 20 is pre-moved at the arc-shaped groove 18 at the top of the disc body 17 to guide the blades 22 connected to the lever 20 through the slot 24 and block the front of the through slot 23. The size of the inlet and outlet channel of the disc body 17 is controlled by leading or leading the blades 22 out of the fan-shaped shell 21, so as to control the airflow. The presence of the silicone sealing strip 19 can prevent the lever 20 from swinging on its own and enhance the sealing effect.

[0017] A bellows 16 is fixed to the front end of the surface of the outer shell 1, and a collar 12 is fixed to the front of the bellows 16. Mounting pieces 11 are fixed to the top and bottom of the collar 12 respectively. Positioning pieces 6 are fixed to both sides of the collar 12 respectively. Guide rods 15 are fixed to both sides of the front surface of the outer shell 1 respectively. Limiting sleeves 4 are fixed to both sides of the front end of the outer shell 1 respectively. A slot 5 is provided between the left and right sides inside the limiting sleeve 4. A baffle 3 is movably connected in the slot 5. A sleeve block 2 is fixed to the left side of the baffle 3. The positioning piece 6 is sleeved on the outside of the guide rod 15. The baffle 3 moves horizontally in and out of the slot 5 and blocks the front of the positioning piece 6. Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, a corrugated pipe 16 is installed at the air inlet at the front end of the outer casing 1. The collar 12 is fixed to the flange of the connecting pipe or the wall. The bolts and nuts are screwed into the mounting plate 11 for fixation. The bending state of the corrugated pipe 16 is adjusted according to the different air inlet positions. If no connection is required, the mounting plate 11 is pushed to the front end of the outer casing 1 so that the positioning plate 6 is sleeved on the guide rod 15. Then the sleeve block 2 is pushed so that the baffle 3 covers the front end of the guide rod 15 to prevent the positioning plate 6 from detaching from the guide rod 15.

[0018] A horizontal groove 8 is provided at the bottom inside the outer casing 1, and a lead screw 9 is movably connected between the left and right sides inside the horizontal groove 8. A threaded block 10 is threadedly connected to the outside of the lead screw 9, and a wiping rod 25 is fixed at the top of the threaded block 10. A motor 7 is fixed at the lower left corner inside the outer casing 1. The right side of the output shaft of the motor 7 is fixedly connected to the lead screw 9, and the wiping rod 25 moves left and right with the threaded block 10. Specifically, such as Figure 1 As shown, the motor 7 in the lower left corner inside the housing 1 is periodically started, thereby rotating the lead screw 9 fixed on the right side of the output end of the motor 7, adjusting the position of the threaded block 10 along the transverse groove 8, and forcing the wiping rod 25 at the top of the threaded block 10 to clean the screen in front of the protective cover 13. The thread on the surface of the lead screw 9 is a standard trapezoidal thread, and its thread helix angle is less than the equivalent friction angle. This structure naturally has a self-locking characteristic, which can stabilize the structure and prevent it from moving on its own.

[0019] Working principle: In use, a corrugated pipe 16 is installed at the air inlet at the front end of the outer shell 1. The collar 12 is fixed to the flange of the connecting pipe or the wall. Bolts and nuts are screwed into the mounting plate 11 for fixation. The bending state of the corrugated pipe 16 is adjusted according to the air inlet position. If no connection is required, the mounting plate 11 is pushed to the front end of the outer shell 1, so that the positioning plate 6 is sleeved on the guide rod 15. Then, the sleeve block 2 is pushed so that the baffle 3 covers the front end of the guide rod 15 to prevent the positioning plate 6 from detaching from the guide rod 15. The disc body 17 is installed behind the fan 14. The arc at the top of the disc body 17 is pre-set. The lever 20 is moved at the groove 18, guiding the blades 22 connected to the lever 20 through the slot 24 and blocking the front of the through slot 23. The size of the inlet and outlet channel of the disc body 17 is controlled by leading or leading the blades 22 out of the fan-shaped shell 21, thereby controlling the airflow. The presence of the silicone sealing strip 19 prevents the lever 20 from swinging on its own. The motor 7 in the lower left corner of the housing 1 is started periodically, thereby rotating the lead screw 9 fixed on the right side of the output end of the motor 7, adjusting the position of the threaded block 10 along the transverse groove 8, and forcing the wiping rod 25 at the top of the threaded block 10 to clean the screen in front of the protective cover 13.

[0020] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A smoke exhaust fan with adjustable air outlet flow rate, comprising a housing (1), characterized in that: A protective cover (13) is installed at the center inside the outer shell (1), and a fan (14) is installed at the center behind the protective cover (13). A disc (17) is fixed at the rear of the surface of the outer shell (1), and four sets of fan-shaped shells (21) are fixed inside the disc (17). The side of the fan-shaped shell (21) is provided with a slot (24), and blades (22) are movably connected in the slot (24). Four sets of through slots (23) are formed between the fan-shaped shell (21) and the disc (17). A lever (20) is fixedly connected at the center between the four sets of blades (22). An arc groove (18) is provided on the surface of the top of the disc (17), and sealing strips (19) are fixed at the front and rear ends of the arc groove (18).

2. The smoke exhaust fan with adjustable outlet flow rate according to claim 1, characterized in that: The top of the lever (20) is embedded in the arc groove (18), and the four sets of blades (22) move in and out of the fan-shaped shell (21) synchronously with the lever (20).

3. A smoke exhaust fan with adjustable outlet flow rate according to claim 1, characterized in that: A corrugated pipe (16) is fixed to the front end of the surface of the outer shell (1), and a collar (12) is fixed to the front of the corrugated pipe (16). Mounting pieces (11) are fixed to the top and bottom of the collar (12), and positioning pieces (6) are fixed to both sides of the collar (12). Guide rods (15) are fixed to both sides of the front surface of the outer shell (1). Limit sleeves (4) are fixed to both sides of the front end of the outer shell (1), and a slot (5) is provided between the left and right sides inside the limit sleeve (4). A baffle (3) is movably connected laterally in the slot (5), and a sleeve block (2) is fixed to the left side of the baffle (3).

4. A smoke exhaust fan with adjustable outlet flow rate according to claim 3, characterized in that: The positioning piece (6) is sleeved on the outside of the guide rod (15), and the baffle (3) moves horizontally into and out of the slot (5) and blocks the front of the positioning piece (6).

5. A smoke exhaust fan with adjustable outlet flow rate according to claim 1, characterized in that: A horizontal groove (8) is provided at the bottom of the inner shell (1), and a lead screw (9) is movably connected between the left and right sides of the inner groove (8). A threaded block (10) is threaded to the outer side of the lead screw (9), and a wiping rod (25) is fixed at the top of the threaded block (10). A motor (7) is fixed at the lower left corner of the inner shell (1).

6. A smoke exhaust fan with adjustable outlet flow rate according to claim 5, characterized in that: The output shaft of the motor (7) is fixedly connected to the lead screw (9) on the right side, and the wiping rod (25) moves left and right with the threaded block (10).

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