Energy-efficient centrifugal fan

Abstract

The application belongs to the technical field of ventilators, and particularly relates to a high-efficiency and energy-saving centrifugal ventilator, which comprises a shell, an impeller arranged in the shell, a first motor arranged on one side of the shell, an output shaft of the first motor connected with the impeller, an air inlet arranged on a side wall of the other side of the shell, an air outlet pipe arranged on the shell, a filter screen arranged in the air outlet pipe, a cleaning brush and a nozzle arranged on the side of the filter screen, the cleaning brush in contact with the surface of the filter screen, the nozzle facing the filter screen, a driving device and a cleaning liquid conveying device arranged on the shell, the driving device connected with the cleaning brush to drive the cleaning brush to rotate intermittently and clean the surface of the filter screen, and the cleaning liquid conveying device connected with the nozzle to intermittently convey cleaning liquid to the nozzle. When the filter screen is cleaned, the ventilator does not need to be stopped, is more efficient, avoids filter screen blockage, reduces the load of the ventilator, and saves energy consumption.

Description

Technical Field

[0001] This invention belongs to the field of ventilation technology, specifically relating to a high-efficiency and energy-saving centrifugal fan. Background Technology

[0002] Centrifugal fans are fluid machines that rely on input mechanical energy to increase gas pressure and transport gas. They are widely used in HVAC, industrial dust removal, mine ventilation, chemical transportation, power cooling and civil building ventilation, and are general-purpose equipment with large usage and high energy consumption in industrial production and public environments.

[0003] Patent CN222702169U discloses a high-efficiency and energy-saving optimized centrifugal fan, including a housing. A connecting cover is fixedly connected to the front of the housing. A filter cover is threadedly connected to the inner ring of the connecting cover. A connecting ring is threadedly connected to the inner ring of the filter cover. A coarse filter screen is fixedly connected to the left end of the connecting ring. A fine filter screen is threadedly connected to the inner ring of the filter cover. A limiting ring is fixedly connected to the inner ring of the filter cover. The left side of the fine filter screen contacts the right side of the limiting ring. A sound insulation cover is fixedly installed on the right side of the housing. This technical solution solves the problem in related technologies where dust removal of gas before ventilation requires components such as a drive assembly, machine body, speed reducer, mixing screen, water pump assembly, nozzles, and treatment box, which increases the overall cost of the centrifugal fan and its energy consumption, thus failing to achieve energy-saving effects.

[0004] However, the above-mentioned patent has the following shortcomings in actual use: the filter cover needs to be removed for cleaning, and the ventilator needs to be stopped, which affects the efficiency of the ventilator. Summary of the Invention

[0005] Therefore, the present invention aims to solve the problem in the prior art that the filter cover needs to be disassembled for cleaning, and the ventilation fan needs to be stopped, which affects the efficiency of the ventilation fan.

[0006] Therefore, the technical solution adopted is a high-efficiency and energy-saving centrifugal fan of the present invention, comprising: a shell, an impeller disposed inside the shell, a first motor disposed on one side of the shell, the output shaft of the first motor being connected to the impeller, an air inlet disposed on the side wall of the other side of the shell, an air outlet disposed on the shell, a filter screen disposed inside the air outlet, a cleaning brush and a nozzle disposed on the side of the filter screen, the cleaning brush contacting the surface of the filter screen, the nozzle facing the filter screen, a drive device and a cleaning fluid delivery device disposed on the shell, the drive device being connected to the cleaning brush and driving the cleaning brush to rotate intermittently for cleaning the surface of the filter screen, and the cleaning fluid delivery device being connected to the nozzle for intermittently delivering cleaning fluid to the nozzle.

[0007] Preferably, the driving device includes: a power box, which is disposed on the outer wall of the air outlet pipe, and a gear is disposed inside the power box. One end of a first rotating shaft is connected to the gear, and the other end of the first rotating shaft extends into the air outlet pipe and is connected to a first bevel gear. A second rotating shaft is disposed inside the air outlet pipe, and the second rotating shaft is perpendicular to the first rotating shaft. The second rotating shaft passes through a first fixed block and is rotatably connected to the first fixed block. The first fixed block is connected to the inner wall of the air outlet pipe. One end of the second rotating shaft is connected to a second bevel gear, and the second bevel gear meshes with the first bevel gear. The other end of the second rotating shaft is connected to a cleaning brush.

[0008] Preferably, a second motor is installed inside the power box. The output shaft of the second motor is connected to the cam. One end of the connecting rod is rotatably connected to the end face of the cam. A rack is installed on the other end of the connecting rod, and the rack meshes with a gear.

[0009] Preferably, a second fixed block is provided between the cam and the gear, the rocker arm is hinged to the second fixed block, one end of the rocker arm is rotatably connected to a roller, the roller contacts the circumferential outer wall of the cam, the other end of the rocker arm is hinged to one end of the movable plate, a limit post is provided on the other end of the movable plate, the limit post is located below the gear, a guide groove is provided on the movable plate, a first rotating shaft passes through the guide groove, a fixed post is provided on the movable plate, one end of the swing block is rotatably connected to the fixed post, the other end of the swing block is connected to the slide bar, a sliding groove is provided on the end of the connecting rod near the rack, and the slide bar is slidably connected to the sliding groove.

[0010] Preferably, the cleaning fluid delivery device includes: a storage tank, which is installed on the outer wall of the air outlet pipe, and the storage tank stores cleaning fluid. A drive pump is installed at the bottom of the storage tank, and the output end of the drive pump is connected to one end of a connecting pipe, while the other end of the connecting pipe is connected to a nozzle.

[0011] Preferably, the storage tank is equipped with a liquid inlet pipe, and a cap is threadedly connected to the liquid inlet pipe.

[0012] Preferably, a base is provided at the bottom of the outer casing.

[0013] Preferably, a hanging ring is provided on the air outlet pipe.

[0014] The technical solution of this invention has the following advantages: A driving device and a cleaning fluid delivery device are provided on the outer casing. The driving device is connected to the cleaning brush, causing the cleaning brush to rotate intermittently for cleaning the surface of the filter screen. The cleaning fluid delivery device is connected to the nozzle for intermittently delivering cleaning fluid to the nozzle. When cleaning the filter screen, there is no need to stop the ventilation fan, making it more efficient, avoiding filter screen clogging, reducing the load on the fan, and saving energy.

[0015] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the air outlet pipe in this invention;

[0020] Figure 3 This is a schematic diagram of the structure of the filter and cleaning brush in this invention;

[0021] Figure 4 This is a schematic diagram showing the meshing state of the rack and gear in the drive device of this invention;

[0022] Figure 5 This is a schematic diagram showing the rack and gear of the drive device separated in this invention;

[0023] Figure 6 This is a schematic diagram of the structure of the movable plate in this invention;

[0024] The components are as follows: 1. Outer shell; 2. Impeller; 3. First motor; 4. Air inlet; 5. Air outlet pipe; 6. Filter screen; 7. Cleaning brush; 8. Nozzle; 9. Power box; 10. Gear; 11. First rotating shaft; 12. First bevel gear; 13. Second rotating shaft; 14. First fixing block; 15. Second bevel gear; 16. Second motor; 17. Cam; 18. Connecting rod; 19. Rack; 20. Second fixing block; 21. Rocker arm; 22. Roller; 23. Moving plate; 24. Limiting post; 25. Guide groove; 26. Fixing post; 27. Swing block; 28. Sliding bar; 29. ​​Sliding groove; 30. Storage tank; 31. Drive pump; 32. Connecting pipe; 33. Liquid inlet pipe; 34. Cover; 35. Base; 36. Lifting ring. Detailed Implementation

[0025] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] This invention provides a high-efficiency and energy-saving centrifugal fan, such as... Figure 1-6 As shown, it includes: a housing 1, an impeller 2 inside the housing 1, a first motor 3 on one side of the housing 1, the output shaft of the first motor 3 being connected to the impeller 2, an air inlet 4 on the side wall of the other side of the housing 1, a coarse filter screen at the air inlet 4 for filtering out large solids, an air outlet pipe 5 on the housing 1, a filter screen 6 inside the air outlet pipe 5, the filter screen 6 being a fine filter screen for filtering small solid particles, a cleaning brush 7 and a nozzle 8 on the side of the filter screen 6, the cleaning brush 7 contacting the surface of the filter screen 6, the nozzle 8 facing the filter screen 6, a drive device and a cleaning fluid delivery device on the housing 1, the drive device being connected to the cleaning brush 7 and driving the cleaning brush 7 to rotate intermittently for cleaning the surface of the filter screen 6, and the cleaning fluid delivery device being connected to the nozzle 8 for intermittently delivering cleaning fluid to the nozzle 8.

[0030] The driving device includes: a power box 9, which is installed on the outer wall of the air outlet pipe 5. A gear 10 is installed inside the power box 9. One end of the first rotating shaft 11 is connected to the gear 10, and the other end of the first rotating shaft 11 extends into the air outlet pipe 5 and is connected to the first bevel gear 12. A second rotating shaft 13 is installed inside the air outlet pipe 5. The second rotating shaft 13 is perpendicular to the first rotating shaft 11. The second rotating shaft 13 passes through the first fixing block 14 and is rotatably connected to the first fixing block 14. The first fixing block 14 is connected to the inner wall of the air outlet pipe 5. One end of the second rotating shaft 13 is connected to the second bevel gear 15, which meshes with the first bevel gear 12. The other end of the second rotating shaft 13 is connected to the cleaning brush 7.

[0031] A second motor 16 is installed inside the power box 9. The output shaft of the second motor 16 is connected to the cam 17. One end of the connecting rod 18 is rotatably connected to the end face of the cam 17, and a rack 19 is installed on the other end of the connecting rod 18. The rack 19 meshes with the gear 10. The circumferential outer wall of the cam 17 is composed of a first circular arc, a first inclined surface, a second circular arc, and the second inclined surface connected end to end. The diameter of the first circular arc is larger than the diameter of the second circular arc.

[0032] A second fixed block 20 is provided between the cam 17 and the gear 10. The rocker arm 21 is hinged to the second fixed block 20. One end of the rocker arm 21 is rotatably connected to a roller 22, which contacts the circumferential outer wall of the cam 17. The other end of the rocker arm 21 is hinged to one end of the moving plate 23. A limit post 24 is provided on the other end of the moving plate 23. The limit post 24 is located below the gear 10. A guide groove 25 is provided on the moving plate 23. The first rotating shaft 11 passes through the guide groove 25. A fixed post 26 is provided on the moving plate 23. One end of the swing block 27 is rotatably connected to the fixed post 26. The other end of the swing block 27 is connected to the slide bar 28. A slide groove 29 is provided on the end of the connecting rod 18 near the rack 19. The slide bar 28 is slidably connected to the slide groove 29.

[0033] The working principle and beneficial technical effects of the above technical solution are as follows: When the filter screen needs cleaning, the second motor 16 is started, driving the cam 17 to rotate. The cam 17 rolls with the roller 22. Due to the change in the diameter of the outer circumferential wall of the cam 17, the rocker arm 21 swings up and down and stops at the extreme position of the swing. The rocker arm 21 drives the moving plate 23 to move up and down and stops at the upper and lower extreme positions. At the same time, the cam 17 drives the connecting rod 18 to move, and the connecting rod 18 slides back and forth relative to the slide bar 28. When the moving plate 23 moves downward, the limiting post 24 disengages from the teeth of the gear 10 and drives the rack 19 to move downward and mesh with the gear 10. When the moving plate 23 stops at the lower extreme position, the rack 19 drives the gear 10 to rotate. Then, when the moving plate 23 moves upward, it drives the rack 19 to disengage from the gear 10, and the limiting post 24 moves upward. The limiting post 24 is locked between the teeth of the gear 10, keeping the gear 10 locked. During this period, the gear 10 cannot rotate. Through the meshing transmission of the first bevel gear 12 and the second bevel gear 15, the gear 10 correspondingly drives the cleaning brush 7 to rotate intermittently, periodically cleaning the surface of the filter screen 6, removing dust or solid particles adhering to the filter screen surface, and then discharging them after passing through the filter screen 6 with the airflow of the fan. Since the cleaning brush 7 occupies only a small area of ​​the filter screen 6, it has little impact on the ventilation efficiency of the filter screen, ensuring the cleanliness of the filter screen while minimizing the impact on the ventilation performance of the filter screen. When the cleaning brush stops, it is locked by the limiting post 24 engaging with the gear 10, so even if the airflow in the outlet pipe is large, the cleaning brush 7 cannot move, making the cleaning brush operation more stable and reliable. When the filter screen is being cleaned, there is no need to stop the fan, which is more efficient, avoids filter screen clogging, reduces the fan load, and saves energy.

[0034] In one embodiment, the cleaning fluid delivery device includes: a storage tank 30, which is disposed on the outer wall of the air outlet pipe 5. The storage tank 30 stores cleaning fluid, and a drive pump 31 is disposed at the bottom of the storage tank 30. The output end of the drive pump 31 is connected to one end of a connecting pipe 32, and the other end of the connecting pipe 32 is connected to a nozzle 8. An inlet pipe 33 is disposed on the storage tank 30, and a cover 34 is threadedly connected to the inlet pipe 33. By opening the cover 34, cleaning fluid is added through the inlet pipe 33. A base 35 is disposed at the bottom of the outer casing 1 to provide stable support for the ventilator. A lifting ring 36 is disposed on the air outlet pipe 5 for easy lifting and transportation. The drive pump 31 can intermittently deliver cleaning fluid to the nozzle 8, and the nozzle 8 intermittently sprays cleaning fluid onto the filter screen 6. The filter screen is then efficiently cleaned by an intermittently rotating cleaning brush 7, saving the amount of cleaning fluid used and fully utilizing the cleaning effect of the cleaning fluid.

[0035] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A high-efficiency and energy-saving centrifugal fan, characterized in that, include: The outer casing (1) has an impeller (2) inside it. A first motor (3) is installed on one side of the outer casing (1). The output shaft of the first motor (3) is connected to the impeller (2). An air inlet (4) is installed on the side wall of the other side of the outer casing (1). An air outlet (5) is installed on the outer casing (1). A filter screen (6) is installed inside the air outlet (5). A cleaning brush (7) and a nozzle (8) are installed on the side of the filter screen (6). The cleaning brush (7) contacts the surface of the filter screen (6). The nozzle (8) faces the filter screen (6). A drive device and a cleaning liquid delivery device are installed on the outer casing (1). The drive device is connected to the cleaning brush (7) and drives the cleaning brush (7) to rotate intermittently to clean the surface of the filter screen (6). The cleaning liquid delivery device is connected to the nozzle (8) and is used to intermittently deliver cleaning liquid to the nozzle (8).

2. The high-efficiency and energy-saving centrifugal fan according to claim 1, characterized in that, The drive unit includes: a power box (9), which is located on the outer wall of the air outlet pipe (5). A gear (10) is installed inside the power box (9). One end of the first rotating shaft (11) is connected to the gear (10), and the other end of the first rotating shaft (11) extends into the air outlet pipe (5) and is connected to the first bevel gear (12). A second rotating shaft (13) is installed inside the air outlet pipe (5). The second rotating shaft (13) is perpendicular to the first rotating shaft (11). The second rotating shaft (13) passes through the first fixed block (14) and is rotatably connected to the first fixed block (14). The first fixed block (14) is connected to the inner wall of the air outlet pipe (5). One end of the second rotating shaft (13) is connected to the second bevel gear (15), which meshes with the first bevel gear (12). The other end of the second rotating shaft (13) is connected to the cleaning brush (7).

3. The high-efficiency and energy-saving centrifugal fan according to claim 2, characterized in that, The power box (9) is equipped with a second motor (16), the output shaft of the second motor (16) is connected to the cam (17), one end of the connecting rod (18) is rotatably connected to the end face of the cam (17), and the other end of the connecting rod (18) is equipped with a rack (19), which meshes with the gear (10).

4. A high-efficiency and energy-saving centrifugal fan according to claim 3, characterized in that, A second fixed block (20) is provided between the cam (17) and the gear (10). The rocker arm (21) is hinged to the second fixed block (20). One end of the rocker arm (21) is rotatably connected to a roller (22). The roller (22) contacts the circumferential outer wall of the cam (17). The other end of the rocker arm (21) is hinged to one end of the moving plate (23). A limit post (24) is provided on the other end of the moving plate (23). The limit post (24) is located below the gear (10). A guide groove (25) is provided on the moving plate (23). The first rotating shaft (11) passes through the guide groove (25). A fixed post (26) is provided on the moving plate (23). One end of the swing block (27) is rotatably connected to the fixed post (26). The other end of the swing block (27) is connected to the slide bar (28). A slide groove (29) is provided on the end of the connecting rod (18) near the rack (19). The slide bar (28) is slidably connected to the slide groove (29).

5. A high-efficiency and energy-saving centrifugal fan according to claim 1, characterized in that, The cleaning fluid delivery device includes: a storage tank (30), which is located on the outer wall of the air outlet pipe (5). The storage tank (30) stores cleaning fluid. A drive pump (31) is installed at the bottom of the storage tank (30). The output end of the drive pump (31) is connected to one end of the connecting pipe (32), and the other end of the connecting pipe (32) is connected to the nozzle (8).

6. A high-efficiency and energy-saving centrifugal fan according to claim 5, characterized in that, The storage tank (30) is equipped with an inlet pipe (33), and a cap (34) is threaded onto the inlet pipe (33).

7. A high-efficiency and energy-saving centrifugal fan according to claim 1, characterized in that, The bottom of the outer casing (1) is provided with a base (35).

8. A high-efficiency and energy-saving centrifugal fan according to claim 1, characterized in that, A hanging ring (36) is provided on the air outlet pipe (5).

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