Low-noise high-efficiency centrifugal fan

Abstract

The present application relates to centrifugal fan technical field, especially to a kind of low-noise high-efficiency centrifugal fan, including corrugated iron roof and centrifugal fan body, quickly installed mechanism, safety protection mechanism and buffer noise reduction mechanism are arranged between the corrugated iron roof and centrifugal fan body;The quickly installed mechanism includes two placement grooves opened in the top end of the corrugated iron roof, installation groove is opened in both sides of the vertical end of two placement grooves, two groups of installation grooves are communicated with reinforcing groove in one end of inner side, further including two connecting columns, two connecting columns are opened with expansion slot A in one end of both sides, two groups of expansion slot A inner wall are slidably provided with installation column, two groups of installation column are opened with expansion slot B in one end of inner side, two groups of expansion slot B inner wall are slidably provided with reinforcing column;The present application can quickly complete the fixed installation of centrifugal fan, avoid to and fro adjustment to centrifugal fan, to improve the installation efficiency of centrifugal fan.

Description

Technical Field

[0001] This invention relates to the field of centrifugal fan technology, and in particular to a low-noise, high-efficiency centrifugal fan. Background Technology

[0002] Centrifugal fans are machines that rely on input mechanical energy to increase gas pressure and discharge gas; they are a type of driven fluid machinery. Centrifugal fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings for ventilation, dust removal, and cooling; in boilers and industrial furnaces for ventilation and induced draft; in air conditioning equipment and household appliances for cooling and ventilation; in grain drying and conveying; as a wind source for wind tunnels and for inflating and propelling hovercraft. The working principle of a centrifugal fan is to use a high-speed rotating impeller to accelerate the gas, then decelerate and change its flow direction, converting kinetic energy into potential energy.

[0003] In existing technology, when installing a centrifugal fan on a corrugated iron roof, it is necessary to manually use a crane to move the centrifugal fan onto the roof and align the mounting holes on the centrifugal fan with those on the corrugated iron roof before fixing it with bolts. However, it is not easy to align the mounting holes on the centrifugal fan with those on the corrugated iron roof, so the centrifugal fan needs to be adjusted back and forth to align the mounting holes. This repeated adjustment takes a lot of time, thus reducing the installation efficiency of the centrifugal fan. In addition, the centrifugal fan will generate vibration and noise during use. The vibration will be transmitted into the room through the roof, and the noise will also be transmitted into the room, thus affecting the indoor working environment. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by proposing a low-noise, high-efficiency centrifugal fan.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a low-noise and high-efficiency centrifugal fan, comprising a corrugated iron roof and a centrifugal fan body, wherein a quick installation mechanism, a safety protection mechanism and a buffer noise reduction mechanism are provided between the corrugated iron roof and the centrifugal fan body; The rapid installation mechanism includes two placement slots opened at the top of the corrugated iron roof. Each of the two placement slots has an installation slot on both sides of its vertical end. One end of each of the two installation slots is connected to a reinforcing slot. It also includes two connecting columns. Each of the two connecting columns has a telescopic groove A on both sides of one end. An installation column is slidably mounted on the inner wall of each of the two telescopic grooves A. Each of the two installation columns has a telescopic groove B on one end of its inner side. A reinforcing column is slidably mounted on the inner wall of each of the two telescopic grooves B. When the installation column is engaged in the installation slot, the reinforcing column is engaged in the reinforcing slot, quickly completing the fixed installation of the centrifugal fan body. The safety protection mechanism is used to conceal and limit the movement of the installation column, and the buffer and noise reduction mechanism is used to reduce the noise of the centrifugal fan body.

[0006] Preferably, the quick installation mechanism further includes movable columns, two sets of movable columns and two connecting columns are fixedly connected, each movable column has a spherical groove B at its bottom end, each spherical groove B has a ball bearing on its inner wall, and the two placement slots have symmetrically provided spherical grooves A at their horizontal ends. The spherical grooves A and the ball bearings are used for positioning, and the length of the front movable column is greater than the length of the rear movable column.

[0007] Preferably, a first spring is fixedly connected to one side of the inner wall of each of the telescopic grooves A, and each set of first springs is fixedly connected to each mounting post. A second spring is fixedly connected to one side of the inner wall of each of the telescopic grooves B, and each second spring is fixedly connected to each reinforcing post. An unlocking rope is fixedly connected to one end of the outer side of each reinforcing post. Two unlocking ropes pass through the mounting post and the connecting post, and a connecting rope is fixedly connected between the two unlocking ropes.

[0008] Preferably, the safety protection mechanism includes a pressure groove formed at the top of the movable column, each pressure groove having a hydraulic flow channel at its bottom end that extends to the telescopic groove A, each hydraulic flow channel having a circular cavity on its inner wall, each circular cavity having a circular plate slidably disposed on its inner wall, each circular plate having a tension spring fixedly connected to one end of its outer side, and each tension spring being fixedly connected to each circular cavity.

[0009] Preferably, each of the circular plates has a telescopic column fixedly connected to its inner wall, and each of the mounting columns has a circular groove at one end on its outer side. Each telescopic column and each circular groove are adapted to each other. Each telescopic column is set in each hydraulic channel, and each set of hydraulic channels and pressing grooves is filled with hydraulic oil.

[0010] Preferably, the safety protection mechanism further includes pressure columns slidably disposed on the inner wall of the pressure groove. Each of the four pressure columns has a limiting groove at one outer end. A square plate is fixedly connected to the top of each of the four pressure columns. Each of the four movable columns has a square groove at one outer end. Each of the four square grooves has a telescopic hole passing through its inner wall. The four telescopic holes and the four pressure grooves are respectively connected. A limiting column is slidably disposed on the inner wall of each of the four telescopic holes. A limiting plate is fixedly connected to one outer end of each of the four limiting columns. A second magnet is fixedly embedded on both sides of the inner wall of each of the four square grooves corresponding to the telescopic holes. A first magnet is fixedly embedded on both sides of the inner side of each of the four limiting plates corresponding to the limiting columns. The first and second magnets have opposite magnetic properties.

[0011] Preferably, the buffer noise reduction mechanism includes square columns fixedly connected to the four corners of the bottom of the centrifugal fan body. Each of the four square columns has a buffer groove at its bottom. Each of the four buffer grooves has a third spring fixedly connected to the top of its inner wall. Each of the four third springs has a circular column fixedly connected to its bottom, which slides on the inner wall of the buffer groove. Each of the four circular columns is fixedly connected to the square plate.

[0012] Preferably, a fixing plate is fixedly connected between the two sets of square columns, and a shock absorber is fixedly connected to the bottom end of each of the two fixing plates. Both shock absorbers are fixedly connected to the square plates.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The quick-installation mechanism allows the connecting column to be aligned with the vertical end of the placement slot. At this point, the rolling ball causes the centrifugal fan to move on the corrugated iron roof. When the ball is engaged in the spherical groove A, the centrifugal fan is positioned. Then, the mounting column is inserted into the mounting slot, and the reinforcing column is inserted into the reinforcing slot. This allows for quick and easy installation of the centrifugal fan, avoiding repeated adjustments and improving installation efficiency. With the safety protection mechanism in place, after the centrifugal fan is installed, the pressure column moves down to force all the hydraulic oil in the pressure groove into the hydraulic channel, and pushes the telescopic column inward to insert it into the circular groove. Then, the limiting column is inserted into the limiting groove to limit the pressure column. At this time, the first magnet and the second magnet are tightly attracted together, and the limiting plate is stuck in the square groove, thereby reducing the exposed structure and preventing it from being disassembled at will, thus improving the overall safety. By using a buffer and noise reduction mechanism, the vibration generated during the operation of the centrifugal fan can be buffered by the shock absorber and the third spring, thereby preventing the vibration from being transmitted into the room and reducing noise, thus preventing it from affecting the indoor working environment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a low-noise, high-efficiency centrifugal fan according to the present invention; Figure 2 This is another structural view of a low-noise, high-efficiency centrifugal fan according to the present invention; Figure 3 This is a diagram of the corrugated iron roof structure of a low-noise, high-efficiency centrifugal fan according to the present invention; Figure 4 This invention relates to a low-noise, high-efficiency centrifugal fan. Figure 3 Enlarged view of the structure at point A in the middle; Figure 5 This is a structural diagram of a moving column for a low-noise, high-efficiency centrifugal fan according to the present invention. Figure 6This is a partial sectional view of the connecting column of a low-noise, high-efficiency centrifugal fan according to the present invention. Figure 7 This is a cross-sectional view of the mounting column of a low-noise, high-efficiency centrifugal fan according to the present invention. Figure 8 This is a diagram showing the separation of the moving column and square plate of a low-noise, high-efficiency centrifugal fan according to the present invention. Figure 9 This invention relates to a low-noise, high-efficiency centrifugal fan. Figure 8 Enlarged view of the structure at point B in the middle; Figure 10 This invention relates to a low-noise, high-efficiency centrifugal fan. Figure 8 Enlarged view of the structure at point C; Figure 11 This is a cross-sectional view of a moving column of a low-noise, high-efficiency centrifugal fan according to the present invention; Figure 12 This is a structural diagram of a square trough for a low-noise, high-efficiency centrifugal fan according to the present invention; Figure 13 This is a square column sectional view of a low-noise, high-efficiency centrifugal fan according to the present invention.

[0015] In the diagram: 1. Corrugated iron roof; 2. Centrifugal fan body; 3. Placement slot; 4. Vibration damper; 5. Connecting rope; 6. Unlocking rope; 7. Moving column; 8. Square plate; 9. Circular column; 10. Square column; 11. Fixing plate; 12. Limiting plate; 13. Spherical groove A; 14. Mounting slot; 15. Reinforcing slot; 16. Mounting column; 17. Connecting column; 18. Spherical groove B; 19. Ball bearing; 20. Circular groove; 21. 21. First spring; 22. Telescopic groove A; 23. Second spring; 24. Telescopic groove B; 25. Reinforcing column; 26. Pressing column; 27. Circular cavity; 28. Circular plate; 29. ​​Tension spring; 30. Hydraulic flow channel; 31. Telescopic column; 32. Limiting groove; 33. Pressing groove; 34. First magnet; 35. Limiting column; 36. Square groove; 37. Second magnet; 38. Telescopic hole; 39. Buffer groove; 40. Third spring. Detailed Implementation

[0016] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0017] like Figures 1-13The illustration shows a low-noise, high-efficiency centrifugal fan, comprising a corrugated iron roof 1 and a centrifugal fan body 2. A quick-installation mechanism, a safety protection mechanism, and a buffer noise reduction mechanism are provided between the corrugated iron roof 1 and the centrifugal fan body 2. The quick-installation mechanism includes two horizontally positioned placement slots 3 at the top of the corrugated iron roof 1, with limiting strips installed on the outer sides of the placement slots 3 to prevent the centrifugal fan body 2 from falling during installation. Installation slots 14 are provided on both sides of the vertical ends of the two placement slots 3, and a reinforcing slot 15 is connected to one end of each of the two sets of installation slots 14. It includes two connecting columns 17, each with a telescopic groove A22 on both sides of one end. An installation column 16 is slidably mounted on the inner wall of each of the two sets of telescopic grooves A22. A telescopic groove B24 is opened on one end of the inner side of each of the two sets of installation columns 16. A reinforcing column 25 is slidably mounted on the inner wall of each of the two sets of telescopic grooves B24. When the installation column 16 is engaged in the installation groove 14, the reinforcing column 25 is engaged in the reinforcing groove 15, quickly completing the fixed installation of the centrifugal fan body 2. A safety protection mechanism is used to conceal and limit the movement of the installation column 16, and a buffer noise reduction mechanism is used to reduce the noise of the centrifugal fan body 2.

[0018] like Figure 3 , Figure 5 As shown, the quick installation mechanism also includes movable columns 7, two sets of movable columns 7 and two connecting columns 17 are fixedly connected, each movable column 7 has a spherical groove B18 at its bottom end, and each spherical groove B18 has a ball bearing 19 on its inner wall. The two placement slots 3 have symmetrically opened spherical grooves A13 at their horizontal ends. The spherical grooves A13 and the ball bearings 19 are used for positioning. The length of the front movable column 7 is greater than the length of the rear movable column 7.

[0019] like Figure 1 , Figure 6 , Figure 7 As shown, a first spring 21 is fixedly connected to one side of the inner wall of each telescopic groove A22. Each set of first springs 21 is fixedly connected to each mounting post 16. A second spring 23 is fixedly connected to one side of the inner wall of each telescopic groove B24. Each second spring 23 is fixedly connected to each reinforcing post 25. An unlocking rope 6 is fixedly connected to one end of the outer side of each reinforcing post 25. Two unlocking ropes 6 pass through the mounting post 16 and the connecting post 17. A connecting rope 5 is fixedly connected between the two unlocking ropes 6. When disassembly is required, the connecting rope 5 and the unlocking rope 6 are pulled, causing the reinforcing post 25 to retract into the telescopic groove B24. Then, the mounting post 16 retracts into the telescopic groove A22, releasing the restriction on the connecting post 17. The elastic force of the second spring 23 is less than that of the first spring 21.

[0020] like Figure 9 , Figure 10 , Figure 11As shown, the safety protection mechanism includes a downward pressure groove 33 at the top of the movable column 7. Each downward pressure groove 33 has a hydraulic flow channel 30 at its bottom end, extending to the telescopic groove A22. The inner wall of each hydraulic flow channel 30 is connected to a circular cavity 27. A circular plate 28 is slidably disposed on the inner wall of each circular cavity 27. A tension spring 29 is fixedly connected to one end of the outer side of each circular plate 28. Each tension spring 29 and each circular cavity 27 are respectively fixedly connected. When the restriction on the downward pressure column 26 is released, the telescopic column 31 moves outward through the reset of the tension spring 29, thereby leaving the range of the circular groove 20, and thus releasing the restriction on the mounting column 16.

[0021] like Figure 6 , Figure 9 As shown, each circular plate 28 has a telescopic column 31 fixedly connected to its inner wall. Each mounting column 16 has a circular groove 20 at one end on its outer side. Each telescopic column 31 and each circular groove 20 are adapted to each other. Each telescopic column 31 is set in each hydraulic channel 30. Hydraulic oil is installed inside each set of hydraulic channels 30 and the pressing groove 33. Force can be transmitted in different directions and positions through hydraulic oil.

[0022] like Figure 8 , Figure 10 , Figure 11 , Figure 12 As shown, the safety protection mechanism also includes pressure columns 26 that are slidably disposed on the inner wall of the pressure groove 33. Each of the four pressure columns 26 has a limit groove 32 at one end on its outer side. A square plate 8 is fixedly connected to the top of each of the four pressure columns 26. Each of the four movable columns 7 has a square groove 36 at one end on its outer side. Each of the four square grooves 36 has a telescopic hole 38 passing through its inner wall. The four telescopic holes 38 and the four pressure grooves 33 are respectively connected. Each of the four telescopic holes 38 has a limit column 35 that is slidably disposed on its inner wall. Each of the four limit columns 35 has a limit plate 12 fixedly connected to one end on its outer side. Each of the four square grooves 36 has a second magnet 37 fixedly embedded on both sides of the inner wall corresponding to the telescopic holes 38. Each of the four limit plates 12 has a first magnet 34 fixedly embedded on both sides of the inner side corresponding to the limit columns 35. The first magnet 34 and the second magnet 37 have different magnetic properties. When disassembly is required, a thin tool is inserted into the gap between the limiting plate 12 and the square groove 36, and then the limiting plate 12 is clamped. At this time, it is moved outward, so that the limiting post 35 is disengaged from the limiting groove 32, which facilitates the subsequent release operation.

[0023] like Figure 1 , Figure 2 , Figure 13As shown, the buffering and noise reduction mechanism includes square columns 10 fixedly connected to the four corners of the bottom of the centrifugal fan body 2. Each of the four square columns 10 has a buffer groove 39 at its bottom. A third spring 40 is fixedly connected to the top of the inner wall of each of the four buffer grooves 39. A circular column 9 that slides along the inner wall of each of the four third springs 40 is fixedly connected to the bottom of each of the four third springs 49. All four circular columns 9 are fixedly connected to a square plate 8. A fixing plate 11 is fixedly connected between each set of square columns 10. A vibration damper 4 is fixedly connected to the bottom of each of the two fixing plates 11. Both vibration dampers 4 are fixedly connected to the square plate 8. The centrifugal fan body 2 generates vibration and noise during operation. The vibration dampers 4 and the third springs 40 can buffer the vibration and reduce noise, ensuring a safe working environment indoors.

[0024] Working principle: First, pull the connecting rope 5 and unlocking rope 6 to one side. At this time, the reinforcing column 25 retracts into the telescopic groove B24, and the mounting column 16 retracts into the telescopic groove A22. Then, place the ball bearing 19 on the placement groove 3, and make the connecting column 17 and the moving column 7 fit against the vertical end of the placement groove 3. Then, release the connecting rope 5 and unlocking rope 6. Then, push the square plate 8 to one side. When the ball bearing 19 is stuck in the spherical groove A13, the positioning is completed. At this time, the elastic reset action of the first spring 21 makes the mounting column 16 stuck into the installation groove 14, and the elastic reset action of the second spring 23 makes the reinforcing column 25 stuck into the reinforcing groove 15. Thus, the fixed installation of the connecting column 17 and the moving column 7 is quickly completed, and the fixed installation of the centrifugal fan body 2 is quickly completed. This avoids the need to adjust the centrifugal fan body 2 back and forth, thereby improving the installation efficiency of the centrifugal fan. After installation, the centrifugal fan body 2 is in a vertical state, which can reduce noise. Furthermore, after installation, the square plate 8 is pushed down to move the pressure column 26 downward, so that all the hydraulic oil at the bottom of the pressure groove 33 can be forced into the hydraulic flow channel 30, thereby pushing the telescopic column 31 to move inward and inserting the telescopic column 31 into the circular groove 20, thus completing the limitation of the installation column 16. Then, the limiting plate 12 and the limiting column 35 are pushed inward and the limiting column 35 is inserted into the limiting groove 32. At this time, since the first magnet 34 and the second magnet 37 have different magnetic properties and attract each other, the limiting plate 12 and the pressure column 26 are fixed. At this time, the structure is inside the moving column 7 and the connecting column 17, preventing it from being opened and disassembled at will, thereby improving the overall safety. The vibration generated when the centrifugal fan body 2 is started will be buffered by the shock absorber 4 and the third spring 40, thereby preventing the vibration from being transmitted into the room. This will also reduce the noise of the centrifugal fan body 2 and prevent it from affecting the indoor working environment.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A low-noise, high-efficiency centrifugal fan, comprising a corrugated iron roof (1) and a centrifugal fan body (2), characterized in that: A quick installation mechanism, a safety protection mechanism, and a buffer noise reduction mechanism are provided between the corrugated iron roof (1) and the centrifugal fan body (2); The rapid installation mechanism includes two placement slots (3) opened at the top of the corrugated iron roof (1). The two placement slots (3) are provided with installation slots (14) on both sides of the vertical end. The two sets of installation slots (14) are connected to a reinforcement slot (15) at one end. It also includes two connecting columns (17). The two connecting columns (17) are provided with telescopic slots A (22) on both sides of one end. The two sets of telescopic slots A (22) are slidably provided with installation columns (16) on the inner wall. The two sets of installation columns (16) are provided with telescopic slots B (24) on one end. The two sets of telescopic slots B (24) are slidably provided with reinforcement columns (25) on the inner wall. When the installation column (16) is stuck in the installation slot (14), the reinforcement column (25) is stuck in the reinforcement slot (15), thus quickly completing the fixed installation of the centrifugal fan body (2). The safety protection mechanism is used to conceal and limit the installation column (16). The buffer noise reduction mechanism is used to reduce the noise of the centrifugal fan body (2).

2. The low-noise, high-efficiency centrifugal fan according to claim 1, characterized in that: The quick installation mechanism also includes a movable column (7), two sets of movable columns (7) and two connecting columns (17) are fixedly connected respectively. Each movable column (7) has a spherical groove B (18) at its bottom end. Each spherical groove B (18) has a ball bearing (19) on its inner wall. The two placement grooves (3) have symmetrical spherical grooves A (13) at their horizontal ends. The spherical grooves A (13) and the ball bearings (19) are used for positioning. The length of the front movable column (7) is greater than the length of the rear movable column (7).

3. The low-noise, high-efficiency centrifugal fan according to claim 1, characterized in that: Each of the telescopic grooves A (22) has a first spring (21) fixedly connected to one side of its inner wall. Each set of first springs (21) is fixedly connected to each mounting post (16). Each of the telescopic grooves B (24) has a second spring (23) fixedly connected to one side of its inner wall. Each second spring (23) is fixedly connected to each reinforcing post (25). Each reinforcing post (25) has an unlocking rope (6) fixedly connected to one end of its outer side. Two unlocking ropes (6) pass through the mounting post (16) and the connecting post (17). A connecting rope (5) is fixedly connected between the two unlocking ropes (6).

4. A low-noise, high-efficiency centrifugal fan according to claim 2, characterized in that: The safety protection mechanism includes a pressure groove (33) opened at the top of the movable column (7). The bottom end of each pressure groove (33) is connected to a hydraulic flow channel (30) and extends to the telescopic groove A (22). The inner wall of each hydraulic flow channel (30) is connected to a circular cavity (27). A circular plate (28) is slidably arranged on the inner wall of each circular cavity (27). A tension spring (29) is fixedly connected to one end of the outer side of each circular plate (28). Each tension spring (29) and each circular cavity (27) are fixedly connected respectively.

5. A low-noise, high-efficiency centrifugal fan according to claim 4, characterized in that: Each of the circular plates (28) has a telescopic column (31) fixedly connected to its inner wall. Each of the mounting columns (16) has a circular groove (20) at one end on its outer side. Each telescopic column (31) and each circular groove (20) are adapted to each other. Each telescopic column (31) is set in each hydraulic channel (30). Hydraulic oil is provided inside each set of hydraulic channels (30) and pressure grooves (33).

6. A low-noise, high-efficiency centrifugal fan according to claim 4, characterized in that: The safety protection mechanism also includes a pressure column (26) that is slidably disposed on the inner wall of the pressure groove (33). A limit groove (32) is opened at one end of each of the four pressure columns (26). A square plate (8) is fixedly connected to the top of each of the four pressure columns (26). A square groove (36) is opened at one end of each of the four moving columns (7). A telescopic hole (38) is provided through the inner wall of each of the four square grooves (36). The four telescopic holes (38) and the four pressure grooves (33) are respectively connected. A limit column (35) is slidably disposed on the inner wall of each of the four telescopic holes (38). A limit plate (12) is fixedly connected to one end of each of the four limit columns (35). A second magnet (37) is fixedly embedded on both sides of the inner wall of each of the four square grooves (36) corresponding to the telescopic holes (38). A first magnet (34) is fixedly embedded on both sides of the inner side of each of the four limit plates (12) corresponding to the limit columns (35). The first magnet (34) and the second magnet (37) have different magnetic properties.

7. A low-noise, high-efficiency centrifugal fan according to claim 6, characterized in that: The buffer noise reduction mechanism includes square columns (10) fixedly connected to the four corners of the bottom of the centrifugal fan body (2). Each of the four square columns (10) has a buffer groove (39) at its bottom. Each of the four buffer grooves (39) has a third spring (40) fixedly connected to the top of its inner wall. Each of the four third springs (40) has a circular column (9) fixedly connected to its bottom, which slides on the inner wall of the buffer groove (39). Each of the four circular columns (9) is fixedly connected to the square plate (8).

8. A low-noise, high-efficiency centrifugal fan according to claim 7, characterized in that: A fixing plate (11) is fixedly connected between the two sets of square columns (10), and a shock absorber (4) is fixedly connected to the bottom of each of the two fixing plates (11). The two shock absorbers (4) are fixedly connected to the square plate (8).

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