Centrifugal fan for dust removal

Abstract

The invention relates to the technical field of centrifugal fans, and discloses a centrifugal fan for dust removal, which is used for solving the problem of impeller vibration caused by different dust attached to blades. When the variable frequency motor drives the impeller to rotate at a high speed, the centrifugal cleaning rods on the impeller generate centrifugal force, and the centrifugal cleaning rods slide towards the outer edges of the blades under the action of the centrifugal force, so that the centrifugal cleaning rods clean the side walls of the two sides of the blades, and the situation that the impeller vibrates due to the fact that the weight of dust attached to the blades is uneven is prevented; therefore, the noise pollution is weakened; when a centrifugal cleaning rod moves under the action of centrifugal force, a transmission gear and power teeth generate meshing transmission, so that the centrifugal cleaning rod rotates, the centrifugal cleaning rod reinforces cleaning of the two sides of a blade, meanwhile, a cleaning disc and bristles are driven to rotate and revolve, and the inner wall of an outer pipeline box is cleaned; and the inner wall of the outer pipeline box body is prevented from being corroded due to the fact that impurities remain on the inner wall of the outer pipeline box body for a long time.

Description

Technical Field

[0001] This application relates to the technical field of centrifugal fans, and particularly to a centrifugal ventilator for dust removal. Background Art

[0002] A household central fresh air system is an integrated ventilation and air change device that filters outdoor air through pipes and delivers it to each room indoors, while exhausting the dirty air indoors, achieving the functions of continuous ventilation for 24 hours, heat recovery and energy conservation, and air purification. A household central fresh air system generally includes a duct-type centrifugal fan, a duct system, a filtration system, and a control system. The duct-type centrifugal fan delivers outdoor air to the filtration system to remove dust and purify the air, and then delivers it to various areas of the home through the duct system.

[0003] Among them, the duct-type centrifugal fan includes an outer duct box, a variable-frequency motor, and an impeller. Since a large amount of dust adheres to the unfiltered outdoor air, during the process of directly delivering the outdoor air through the impeller, some dust in the air will adhere to the blades. When the dust adhering to several blades is different, the mass of each blade is different. During the process of the variable-frequency motor driving the entire impeller to rotate, the impeller will vibrate, increasing noise pollution. Summary of the Invention

[0004] This application provides a centrifugal ventilator for dust removal, which has the advantage of preventing dust with different masses from adhering to the blades, so as to solve the problem of impeller vibration caused by different dust adhering to the blades.

[0005] To achieve the above object, this application adopts the following technical solutions: A centrifugal ventilator for dust removal includes an outer duct box, a variable-frequency motor, and an impeller. The outer duct box includes a partition plate, an air inlet closing plate, and an air outlet closing plate. The impeller includes: a hub, fixedly sleeved on the driving shaft of the variable-frequency motor at the central position; several blades, arrayed and connected to one side of the hub close to the variable-frequency motor; a shroud, fixedly connected to the other ends of the blades; a moving groove, opened on the hub and the shroud close to the end face of the blade; a centrifugal cleaning rod, with both ends movably inserted into one end of the moving groove close to the center line of the hub, for cleaning the blades; a sealing elastic cloth, slidably installed on the outer end faces of the hub and the shroud, for closing the moving groove and pulling the centrifugal cleaning rod back to its original position.

[0006] Further, several power teeth are fixedly installed on the side walls of the two moving grooves close to each other. Transmission gears are fixedly sleeved on both ends of the centrifugal cleaning rod, and the transmission gears are engaged with the power teeth.

[0007] Further, the centrifugal cleaning rod includes: a cleaning outer rod, which is a hollow tubular structure and whose outer end face is closely attached to the blade; a moving rod, which is slidably installed at both ends inside the cleaning outer rod; a tension spring, which is fixedly connected to the opposite faces of the two moving rods; a transmission gear, which is fixedly sleeved on the end of the moving rod extending out of the cleaning outer rod; a cleaning disk is fixedly connected to the end of the moving rod, and a brush is fixedly connected to the end of the cleaning disk away from the moving rod, and the brush is closely attached to the inner wall of the outer pipeline box.

[0008] Further, an inclined groove is formed at the end of the moving groove close to the edges of the wheel disc and the wheel cover.

[0009] Further, the tension spring is always in a stretched state, and both ends of the tension spring are respectively fixedly connected to the moving rods on both sides.

[0010] Further, a storage groove is formed on the end face of the blade close to the edge, and the end of the moving groove close to the storage groove is arc-shaped.

[0011] Further, a plurality of insertion holes are formed on the cleaning disk, a scraping disk is sleeved outside the cleaning disk, the brush of the cleaning disk penetrates through the scraping disk, a plurality of insertion posts are fixedly connected to the side of the scraping disk close to the cleaning disk, the insertion posts are movably inserted into the insertion holes, and the scraping disk is movably arranged inside the closed elastic cloth.

[0012] Further, the closed elastic cloth between the scraping disk and the driving shaft of the variable-frequency motor has elasticity, and the elasticity of the closed elastic cloth is used to pull the scraping disk, the cleaning disk and the centrifugal cleaning rod back to their original positions.

[0013] The present application has the following beneficial effects: 1. For a centrifugal ventilator for dust removal provided by the present application, when the impeller rotates at a high speed driven by the variable-frequency motor, the centrifugal cleaning rod on the impeller generates centrifugal force. Under the action of the centrifugal force, the centrifugal cleaning rod slides towards the outer edge of the blade, so as to clean the side walls on both sides of the blade, preventing uneven dust adhesion on the blade, resulting in impeller vibration, and thus reducing noise pollution.

[0014] 2. For a centrifugal ventilator for dust removal provided by the present application, when the centrifugal cleaning rod moves under the action of centrifugal force, the transmission gear meshes with the power tooth to drive the centrifugal cleaning rod to rotate, so as to strengthen the cleaning of both sides of the blade.

[0015] 3. For a centrifugal ventilator for dust removal provided by the present application, during the rotation of the centrifugal cleaning rod, the moving rod of the centrifugal cleaning rod drives the cleaning disk and the brush to rotate self, and at the same time, the impeller drives the cleaning disk and the brush to rotate around, and under the action of the self-rotation and revolution of the cleaning disk and the brush, the cleaning disk cleans the inner wall of the outer pipeline box, preventing impurities from remaining on the inner wall of the outer pipeline box for a long time, resulting in corrosion of the inner wall of the outer pipeline box.

[0016] 4. The centrifugal ventilator for dust removal provided by the present application, during the sliding process of the centrifugal cleaning rod towards the outer edge of the blade, the cleaning disc slides into the inclined groove, while the scraping disc still closely adheres to the side walls of the wheel disc and the wheel cover, causing the bristles on the cleaning disc to be scraped by the scraping disc, thereby cleaning the impurities on the bristles and preventing the residual impurities on the bristles from affecting the next cleaning of the inner wall of the outer pipeline box by the bristles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings forming a part of the specification depict the embodiments disclosed in the present application and, together with the specification, are used to explain the principles disclosed in the present application.

[0018] With reference to the accompanying drawings, the present disclosure can be more clearly understood from the following detailed description, where: Figure 1 is a schematic three-dimensional structure diagram of the present invention; Figure 2 is a schematic internal structure diagram of the outer pipeline box of the present invention; Figure 3 is a schematic structure diagram of the impeller of the present invention; Figure 4 is a partial cross-sectional view of the impeller of the present invention; Figure 5 is a partial structure schematic diagram of the wheel disc of the present invention; Figure 6 For the present invention Figure 5 is an enlarged partial structure diagram at position A in; Figure 7 is a schematic internal structure diagram of the centrifugal cleaning rod of the present invention; Figure 8 For the present invention Figure 7 is a partial structure schematic diagram at position B in; Figure 9 is a schematic structure diagram of the cleaning disc and the scraping disc of the present invention.

[0019] In the figure: 1. Outer pipeline box; 11. Partition board; 12. Air inlet closing board; 13. Air outlet closing board; 2. Variable frequency motor; 3. Impeller; 31. Wheel disc; 32. Blades; 321. Storage groove; 33. Wheel cover; 34. Moving groove; 341. Power tooth; 342. Inclined groove; 35. Centrifugal cleaning rod; 351. Cleaning outer rod; 352. Moving rod; 353. Tensile spring; 355. Transmission gear; 36. Cleaning disc; 361. Bristles; 362. Insertion hole; 37. Scraping disc; 371. Insertion post; 38. Sealing elastic cloth. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0021] Please refer to Figure 1 and Figure 2 , a centrifugal fan for dust removal, which includes an outer pipeline box body 1, a variable-frequency motor 2 and an impeller 3. A partition plate 11 that divides the outer pipeline box body 1 into two spaces is fixedly installed in the middle of the outer pipeline box body 1. A variable-frequency motor 2 is fixedly installed on the inner wall of one side space of the outer pipeline box body 1. An impeller 3 is arranged in the other side space of the outer pipeline box body 1. The drive shaft of the variable-frequency motor 2 is fixedly connected to the axis of the impeller 3. The variable-frequency motor 2 is used to drive the impeller 3 to rotate at a high speed. One end of the space in the outer pipeline box body 1 where the variable-frequency motor 2 is installed is sealed with an air inlet closing plate 12, and the other end of the space in the outer pipeline box body 1 where the impeller 3 is installed is sealed with an air outlet closing plate 13.

[0022] Please refer to Figures 2-6 , the impeller 3 includes a hub 31, blades 32 and a shroud 33. The center position of the hub 31 is fixedly sleeved on the drive shaft of the variable-frequency motor 2. A plurality of blades 32 are annularly arranged on one side of the hub 31 close to the variable-frequency motor 2. The other ends of the blades 32 are fixedly connected to the shroud 33, and the shroud 33 and the hub 31 are coaxially installed. Moving grooves 34 are opened on the hub 31 and the shroud 33 close to the end faces of the blades 32. One end of the moving groove 34 close to the center line of the hub 31 is movably inserted with a centrifugal cleaning rod 35 for cleaning the blades 32. The centrifugal cleaning rod 35 is close to the end face of the blade 32. A sealing elastic cloth 38 is slidably installed on the outer end faces of the hub 31 and the shroud 33. The sealing elastic cloth 38 is used to seal the moving groove 34 and pull the centrifugal cleaning rod 35 back to its original position; when using the pipeline centrifugal fan to transport unfiltered and unpurified external air, the variable-frequency motor 2 drives the impeller 3 to rotate. During the high-speed rotation of the impeller 3, the centrifugal cleaning rod 35 on the impeller 3 is affected by the centrifugal force, and the centrifugal cleaning rod 35 moves along the end face of the blade 32 towards the outer edge of the hub 31. During the movement of the centrifugal cleaning rod 35, the centrifugal cleaning rod 35 scrapes and cleans the end face of the blade 32, preventing uneven dust adhesion on the blade 32 from causing the impeller 3 to vibrate, thereby reducing noise pollution.

[0023] Please refer to Figures 2-9, on the side walls of the two moving grooves 34 close to each other, several driving teeth 341 are fixedly installed. At both ends of the centrifugal cleaning rod 35, transmission gears 355 are fixedly sleeved. The transmission gears 355 are meshed with the driving teeth 341. When the centrifugal cleaning rod 35 moves outward under the action of centrifugal force, due to the meshing of the transmission gears 355 at the ends of the centrifugal cleaning rod 35 with the driving teeth 341, meshing transmission occurs between the transmission gears 355 and the driving teeth 341, causing the centrifugal cleaning rod 35 to rotate. The rotating centrifugal cleaning rod 35 cleans the end faces of the blades 32, thereby strengthening the cleaning of both sides of the blades 32 by the centrifugal cleaning rod 35.

[0024] Please refer to Figures 2-9 , the centrifugal cleaning rod 35 includes a cleaning outer rod 351, a moving rod 352 and a tension spring 353. The cleaning outer rod 351 is a hollow tubular structure, and the outer end face of the cleaning outer rod 351 is closely attached to the blade 32. At both ends inside the cleaning outer rod 351, the moving rods 352 are slidably installed. On the opposite faces of the two moving rods 352, a tension spring 353 is fixedly connected. At the end of the moving rod 352 extending out of the cleaning outer rod 351, a transmission gear 355 is fixedly sleeved. The transmission gear 355 is meshed with the driving teeth 341. At the end of the moving rod 352, a cleaning disc 36 is fixedly connected. At one end of the cleaning disc 36 away from the moving rod 352, a brush 361 is fixedly connected. The brush 361 is closely attached to the inner wall of the outer pipe box body 1. When the variable-frequency motor 2 is started, the rotational speed of the variable-frequency motor 2 is slow at first and gradually accelerates to the maximum rotational speed. During the process that the centrifugal cleaning rod 35 moves outward and revolves under the action of centrifugal force, the centrifugal cleaning rod 35 drives the cleaning disc 36 and the brush 361 to rotate. At the same time, the impeller 3 drives the cleaning disc 36 and the brush 361 to revolve. Under the action of the rotation and revolution of the cleaning disc 36 and the brush 361, the brush 361 cleans the inner wall of the outer pipe box body 1, preventing impurities from remaining on the inner wall of the outer pipe box body 1 for a long time, resulting in corrosion of the inner wall of the outer pipe box body 1.

[0025] Please refer to Figure 5 and Figure 6 , at the end of the moving groove 34 close to the edges of the wheel disc 31 and the wheel cover 33, an inclined groove 342 is formed. The tension spring 353 is always in a stretched state. The two ends of the tension spring 353 are respectively fixedly connected to the moving rods 352 on both sides. Under the action of centrifugal force, when the centrifugal cleaning rod 35 and the cleaning disc 36 slide to the end position of the moving groove 34, under the action of the elastic force of the tension spring 353, the tension spring 353 pulls the moving rod 352, the cleaning disc 36 and the brush 361 to move, so that the cleaning disc 36 and the brush 361 slide into the inclined groove 342, and the end of the brush 361 no longer contacts the inner wall of the outer pipe box body 1, preventing the brush 361 from contacting the inner wall of the outer pipe box body 1 for a long time, resulting in serious wear of the brush 361.

[0026] Please refer to Figures 4-6, a storage groove 321 is formed on the end face of the blade 32 near the edge, and the end of the moving groove 34 close to the storage groove 321 is arc-shaped; under the action of centrifugal force, when the centrifugal cleaning rod 35 and the cleaning disc 36 slide to the end of the moving groove 34, the centrifugal cleaning rod 35 slides into the storage groove 321 of the blade 32, so as to store the centrifugal cleaning rod 35 and prevent the centrifugal cleaning rod 35 from blocking the flow of gas.

[0027] Please refer to Figures 2-9 , a plurality of jacks 362 are formed on the cleaning disc 36, a scraping disc 37 is sleeved outside the cleaning disc 36, the bristles 361 of the cleaning disc 36 penetrate through the scraping disc 37, a plurality of insertion posts 371 are fixedly connected to the side of the scraping disc 37 close to the cleaning disc 36, the insertion posts 371 are movably inserted into the jacks 362, and the scraping disc 37 is movably arranged in the closed elastic cloth 38; under the action of centrifugal force, when the centrifugal cleaning rod 35 and the cleaning disc 36 slide to the end of the moving groove 34, under the elastic force of the tension spring 353, the tension spring 353 pulls the moving rod 352, the cleaning disc 36 and the bristles 361 to move, so that the cleaning disc 36 and the bristles 361 slide into the inclined groove 342. Since the scraping disc 37 is restricted by the wheel disc 31 and the wheel cover 33, the bristles 361 on the cleaning disc 36 are scraped by the scraping disc 37, so that the impurities on the bristles 361 are scraped by the scraping disc 37, preventing the residues on the bristles 361 from affecting the next cleaning of the inner wall of the outer pipeline box body 1 by the bristles 361.

[0028] The closed elastic cloth 38 located between the scraping disc 37 and the drive shaft of the variable frequency motor 2 has elasticity, and the elasticity of the closed elastic cloth 38 is used to pull the scraping disc 37, the cleaning disc 36 and the centrifugal cleaning rod 35 to reset; when the operation stops, under the action of the elasticity of the closed elastic cloth 38, the closed elastic cloth 38 pulls the cleaning disc 36, the scraping disc 37 and the centrifugal cleaning rod 35 to reset.

[0029] The working principle of the present invention is as follows: Please refer to Figures 1-9 , when using the pipeline centrifugal ventilator to convey the unfiltered and purified external air, the variable frequency motor 2 drives the impeller 3 to rotate. During the high-speed rotation of the impeller 3, the centrifugal cleaning rod 35 on the impeller 3 is affected by centrifugal force, and the centrifugal cleaning rod 35 moves along the end face of the blade 32 towards the outer edge of the wheel disc 31. During the movement of the centrifugal cleaning rod 35, the centrifugal cleaning rod 35 scrapes and cleans the end face of the blade 32, preventing the uneven weight of the dust adhered to the blade 32 from causing the impeller 3 to vibrate, thereby reducing the noise pollution.

[0030] When the centrifugal cleaning rod 35 moves outward under the action of centrifugal force, since the transmission gear 355 at the end of the centrifugal cleaning rod 35 meshes with the power tooth 341, the transmission gear 355 and the power tooth 341 generate meshing transmission, causing the centrifugal cleaning rod 35 to rotate. The rotating centrifugal cleaning rod 35 cleans the end face of the blade 32, thereby strengthening the cleaning of both sides of the blade 32 by the centrifugal cleaning rod 35; When the variable-frequency motor 2 is started, the rotation speed of the variable-frequency motor 2 is slow at the beginning and gradually accelerates to the maximum speed. During the process that the centrifugal cleaning rod 35 moves outward and revolves under the action of centrifugal force, the centrifugal cleaning rod 35 drives the cleaning disc 36 and the brush hairs 361 to rotate. At the same time, the impeller 3 drives the cleaning disc 36 and the brush hairs 361 to revolve. Under the action of the rotation and revolution of the cleaning disc 36 and the brush hairs 361, the brush hairs 361 clean the inner wall of the outer pipeline box body 1, preventing impurities from remaining on the inner wall of the outer pipeline box body 1 for a long time and causing corrosion of the inner wall of the outer pipeline box body 1.

[0031] Under the action of centrifugal force, when the centrifugal cleaning rod 35 and the cleaning disc 36 slide to the position at the end of the moving groove 34, under the elastic force of the tension spring 353, the tension spring 353 pulls the moving rod 352, the cleaning disc 36 and the brush hairs 361 to move, so that the cleaning disc 36 and the brush hairs 361 slide into the inclined groove 342, and the end of the brush hairs 361 no longer contacts the inner wall of the outer pipeline box body 1, preventing the brush hairs 361 from contacting the inner wall of the outer pipeline box body 1 for a long time and causing serious wear of the brush hairs 361; While the cleaning disc 36 and the brush hairs 361 slide into the inclined groove 342, since the scraping disc 37 is restricted by the wheel disc 31 and the wheel cover 33, the brush hairs 361 on the cleaning disc 36 are scraped by the scraping disc 37, so that the impurities on the brush hairs 361 are scraped by the scraping disc 37, preventing impurities from remaining on the brush hairs 361 and affecting the next cleaning of the inner wall of the outer pipeline box body 1 by the brush hairs 361.

Claims

1. A centrifugal fan for dust removal, comprising an outer pipe box body (1), a frequency conversion motor (2) and an impeller (3), wherein the outer pipe box body (1) comprises a partition plate (11), an air inlet closing plate (12) and an air outlet closing plate (13), and is characterized in that: The impeller (3) includes: a disk (31) fixedly sleeved on the drive shaft of the variable-frequency motor (2) at the central position; a plurality of blades (32) arrayedly connected to one side of the disk (31) close to the variable-frequency motor (2); a cover (33) fixedly connected to the other ends of the blades (32); a moving groove (34) formed in the disk (31) and the cover (33) closely attached to the end faces of the blades (32); a centrifugal cleaning rod (35) with both ends movably inserted into one end of the moving groove (34) close to the center line of the disk (31) for cleaning the blades (32); a closed elastic cloth (38) slidably mounted on the outer end faces of the disk (31) and the cover (33) for closing the moving groove (34) and pulling the centrifugal cleaning rod (35) to reset.

2. The centrifugal ventilator for dust removal according to claim 1, characterized in that: A plurality of power teeth (341) are fixedly mounted on the side walls of the two adjacent moving grooves (34), and transmission gears (355) are fixedly sleeved on both ends of the centrifugal cleaning rod (35), and the transmission gears (355) are meshed with the power teeth (341).

3. The centrifugal ventilator for dust removal according to claim 2, wherein: The centrifugal cleaning rod (35) includes: a cleaning outer rod (351) which is a hollow tubular structure and the outer end face is closely attached to the blade (32); a moving rod (352) slidably mounted at both ends inside the cleaning outer rod (351); a tension spring (353) fixedly connected to the opposite faces of the two moving rods (352); a transmission gear (355) fixedly sleeved on the end of the moving rod (352) extending out of the cleaning outer rod (351); A cleaning disk (36) is fixedly connected to the end of the moving rod (352), and a brush (361) is fixedly connected to one end of the cleaning disk (36) away from the moving rod (352), and the brush (361) is closely attached to the inner wall of the outer pipe box body (1).

4. The centrifugal ventilator for dust removal according to claim 3, characterized in that: An inclined groove (342) is formed at the end of the moving groove (34) close to the edges of the disk (31) and the cover (33).

5. The centrifugal ventilator for dust removal according to claim 3, characterized in that: The tension spring (353) is always in a stretched state, and both ends of the tension spring (353) are respectively fixedly connected to the moving rods (352) on both sides.

6. The centrifugal ventilator for dust removal according to claim 3, wherein: A storage groove (321) is formed on the end face of the blade (32) close to the edge, and the end of the moving groove (34) close to the storage groove (321) is arc-shaped.

7. The centrifugal ventilator for dust removal according to claim 3, characterized in that: A plurality of jacks (362) are formed in the cleaning disk (36), a scraping disk (37) is sleeved outside the cleaning disk (36), the brush (361) of the cleaning disk (36) penetrates through the scraping disk (37), a plurality of inserting columns (371) are fixedly connected to one side of the scraping disk (37) close to the cleaning disk (36), the inserting columns (371) are movably inserted into the jacks (362), and the scraping disk (37) is movably arranged in the closed elastic cloth (38).

8. The centrifugal ventilator for dust removal according to claim 1, characterized in that: The closed elastic cloth (38) between the scraping disk (37) and the drive shaft of the variable-frequency motor (2) has elasticity, and the elasticity of the closed elastic cloth (38) is used to pull the scraping disk (37), the cleaning disk (36) and the centrifugal cleaning rod (35) to reset.

Images