High-speed low-noise centrifugal fan with air filtering effect

Abstract

The invention relates to the technical field of centrifugal fans, and discloses a high-speed low-noise centrifugal fan with an air filtering effect, the high-speed low-noise centrifugal fan comprises an air inlet, one end of the air inlet is connected with a noise reduction box, and one end of the noise reduction box is connected with an air outlet elbow. The sanitation operation sweeper with the high-speed centrifugal fan assembly can achieve the following sweeping operation operation effects: the box-type assembly is adopted, the modular design is adopted, and the physical interface with the whole sweeper is simple; under the same use working condition, the operation noise of the reinforced gear is reduced from the original 86db to the current 78db, and is reduced by 6db; particularly, high-frequency noise is suppressed; compared with an original fan, the occupied space of the high-speed low-noise centrifugal fan is reduced from original 1.85 m < 3 > to present 1.27 m < 3 >, compared with the original fan, the space requirement is reduced by 31%, dust and impurities are filtered, the impurities can be prevented from entering the fan assembly, and the filter screen can be cleaned and the impurities can be collected after the high-speed low-noise centrifugal fan is used.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifugal fans, and in particular relates to a high-speed and low-noise centrifugal fan with air filtering effect. Background Art

[0002] At present, the sanitation equipment industry has changed the power of fans from fuel to electric motors, but still uses general-purpose centrifugal fans to provide air sources, and has not taken effective vibration and noise reduction measures.

[0003] The existing fans are noisy and cause serious disturbance to the public when operating at close range. Especially when cleaning heavily polluted roads, where the flow of people and goods is relatively concentrated and dense, the fans have to be operated at high speeds in enhanced cleaning mode, which makes the problem even more prominent. The transmission system of general-purpose fans is complex, with a transmission method of special bearing seat + industrial belt. General-purpose fans are installed in sanitation vehicles. They are large in size and occupy a large amount of limited space, which is not convenient for the overall layout of special-purpose vehicles. The mechanical vibration and noise are relatively large, and fine dust and impurities are easy to enter the inside of the fan, which will affect the use of the fan in the long run.

[0004] Therefore, it is necessary to invent a high-speed, low-noise centrifugal fan with air filtering effect to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides a high-speed, low-noise centrifugal fan with air filtering effect to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a high-speed, low-noise centrifugal fan with air filtering effect, comprising an air inlet, one end of the air inlet is connected to a noise reduction box, one end of the noise reduction box is connected to an air outlet elbow, one end of the air outlet elbow away from the noise reduction box is connected to an air outlet transition section, and one end of the air outlet transition section away from the air outlet elbow is connected to an air outlet noise reduction section; The noise reduction box includes a noise reduction box body, a motor vibration reduction rubber pad, a noise reduction box body cover joint surface sealing strip, a noise reduction box cover, sound-absorbing cotton, a fan assembly, a fan air inlet and box body elastic soft connection sleeve, a fan air inlet and box body soft connection pad, and a fan air inlet and box body connection load-bearing plate; The air inlet and the air outlet elbow are elastically connected to the noise reduction box and sealed with the noise reduction box. The noise reduction box, the sealing strip of the joint surface of the noise reduction box cover and the noise reduction box cover form an enclosed space of the noise reduction box. The noise reduction box and the noise reduction box cover are connected by a mechanical buckle. The sealing strip of the joint surface of the noise reduction box cover is arranged between the noise reduction box and the noise reduction box cover. The fan assembly is connected to the noise reduction box through three soft connections. A filter component for filtering dust and impurities is provided in the air inlet.

[0007] Furthermore, the fan assembly is fixed to the motor vibration-damping rubber pad of the motor mounting seat inside the noise reduction box through a motor mounting seat. The fan assembly is composed of a motor, a volute, an impeller, a fan air inlet deflector, etc. The fan air inlet deflector is connected to the fan air inlet and the elastic flexible connecting sleeve of the box. The fan air inlet and the elastic flexible connecting sleeve of the box are further connected to the noise reduction box. The air inlet is fixed to the fan air inlet and box connection load-bearing plate of the noise reduction box by the fan air inlet and box soft connecting pad.

[0008] Furthermore, the fan assembly is provided with a device wiring, the device wiring passes through the noise reduction box, and the device wiring is connected to the noise reduction box through a mechanical sealing component.

[0009] Furthermore, the mechanical seal assembly includes a mechanical seal fixing nut, a mechanical seal body, a sound-absorbing soft gasket, a mechanical seal filled with sound-absorbing material, and a mechanical seal filler fastening nut. The sound-absorbing soft gasket is arranged on the mechanical seal body, the mechanical seal body passes through the noise reduction box, the mechanical seal fixing nut is threadedly connected to the outside of one end of the mechanical seal body passing through the noise reduction box, the mechanical seal filling with sound-absorbing material is arranged in the mechanical seal body, the equipment wiring passes through the mechanical seal filling with sound-absorbing material, and the mechanical seal filling fastening nut is threadedly connected to the outside of the mechanical seal body.

[0010] Furthermore, an opening is provided on one side of the noise reduction box, one end of the air outlet elbow is connected to an air outlet vibration damping sealing gasket through an air outlet elbow flange plate, the end of the air outlet vibration damping sealing gasket away from the air outlet elbow flange plate is connected to a volute air outlet, a noise reduction box bottom plate is provided in the opening, and the air outlet vibration damping sealing gasket is inserted into the noise reduction box bottom plate.

[0011] Furthermore, a sound-absorbing and vibration-reducing sealing strip with a rectangular cross-section is fixed on the flange plate of the air outlet elbow.

[0012] Furthermore, the filter assembly includes a filter frame fixedly connected to the inside of the air inlet, a filter is provided inside the filter frame, a first annular groove and a second annular groove are provided on the front side of the filter frame, the diameter of the first annular groove is larger than the second annular groove, a ring plate is rotatably installed in the first annular groove, a groove is provided on the front side of the ring plate, a slide plate is slidably installed in the groove, the slide plate is fixedly connected to the inner wall of the groove through a plurality of springs, a mounting plate is provided on the front side of the slide plate, the mounting plate and the slide plate are connected by bolts, rollers are symmetrically rotatably installed on the mounting plate, a lint-sticking roll paper is rolled up on the outside of the roller close to the filter, and the other end of the lint-sticking roll paper is adhered to another roller On the upper side, the outer side of the lint-sticking paper roll contacts the filter screen, the outer sides of the two rotating rollers are fixedly sleeved with a first gear, a second gear meshing with them is provided between the two first gears, the second gear is rotatably connected to the mounting plate through a rotating shaft, a circular ring is slidably provided in the second annular groove, and first teeth meshing with the first gear are equidistantly arranged around the outer side of the circular ring, an electric push rod is symmetrically fixedly installed on the rear side of the filter screen frame, the telescopic end of the electric push rod is fixedly connected to the circular ring, and second teeth are equidistantly arranged around the front side of the ring plate, a motor is fixedly installed on the outside of the air inlet, and the output shaft of the motor extends to the air inlet and is fixedly connected to a third gear meshing with the second teeth.

[0013] Furthermore, a protective shell is provided on the outer side of the rotating roller close to the filter screen, and the protective shell covers the unused part of the lint-free paper roll. A magnet is fixedly connected to one side of the protective shell, and the mounting plate is made of iron, and one end of the magnet is adsorbed and fixed on the mounting plate.

[0014] Technical effects and advantages of the present invention: 1. The sanitation cleaning vehicle equipped with the high-speed centrifugal fan assembly of the present invention can achieve the following cleaning operation effects: 1.1. Box-type assembly, modular design, simple physical interface with the vehicle, no need for centralized assembly on the washing machine, can be assembled as parts in a dispersed manner, easy to install and debug; 1.2. Under the same working conditions, the noise level of the enhanced gear operation has been reduced from the original 86db to the current 78db, a decrease of 6db; in particular, the suppression of high-frequency noise has greatly improved the comfort of the drivers and passengers in the cab; 1.3. Compared with the original fan, the space occupied by the high-speed and low-noise centrifugal fan is reduced from 1.85m 3 Down to now 1.27m 3 , compared with the original fan, the space requirement is reduced by 31%; 1.4. Under the same working conditions as the walking speed of 5km / h, the suction capacity during cleaning operation is increased from the original 1000g / m 2 , increased to the current 1600g / m 2; When strengthening the cleaning operation, any heavily polluted road surface can be cleaned once and for all to achieve a level of cleanliness that can be sat on the ground; 2. The present invention filters out dust and impurities through the filter screen. By filtering the dust and impurities, the impurities are prevented from entering the fan assembly, thereby protecting the fan assembly. The filter screen can be cleaned and the impurities can be collected after use. The cleaning method adopts the bonding of sticky rolling paper, so that the impurities blocked in the filter screen can be cleaned more thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The schematic diagram shows the structure of a high-speed, low-noise centrifugal fan with air filtering effect according to an embodiment of the present invention. Figure 1 ; Figure 2 A schematic cross-sectional view of a noise reduction box according to an embodiment of the present invention is shown; Figure 3 The schematic diagram shows the structure of a high-speed, low-noise centrifugal fan with air filtering effect according to an embodiment of the present invention. Figure 2 ; Figure 4 The embodiment of the present invention is shown Figure 1 The enlarged structural diagram at A in the middle; Figure 5 The embodiment of the present invention is shown Figure 3 The enlarged structural diagram at B in the middle; Figure 6 A schematic structural diagram of the air inlet and filter assembly combination according to an embodiment of the present invention is shown; Figure 7 A schematic diagram showing the structure of a filter assembly according to an embodiment of the present invention is shown; Figure 8 A schematic cross-sectional view of a filter assembly according to an embodiment of the present invention is shown; Fig. 9 The embodiment of the present invention is shown Figure 8 The enlarged structural diagram at C in the middle; In the figure: 1. Air inlet; 2. Noise reduction box; 2.1. Noise reduction box body; 2.2. Motor vibration reduction rubber pad; 2.3. Sealing strip of the joint surface of the noise reduction box body and cover; 2.4. Noise reduction box cover; 2.5. Sound-absorbing cotton; 2.6. Fan assembly; 2.7. Elastic soft connection sleeve between fan air inlet and box body; 2.8. Soft connection pad between fan air inlet and box body; 2.9. Load-bearing plate connecting fan air inlet and box body; 2.10. Fixing nut of mechanical seal device; 2.11. Mechanical seal device body; 2.12. Sound-absorbing soft pad; 2.13. Sound-absorbing material filled in mechanical seal device; 2.14. Fastening nut of filling material of mechanical seal device; 2.15. 1. Spare wiring; 2.16. volute air outlet; 2.17. air outlet vibration damping seal; 2.18. noise reduction box bottom plate; 2.19. air outlet elbow flange plate; 3. air outlet elbow; 3.1. ring plate; 3.2. slide plate; 3.3. mounting plate; 3.4. bolt; 3.5. roller; 3.6. lint-sticking roller paper; 3.7. first gear; 3.8. circular ring; 3.9. electric push rod; 3.10. spring; 3.11. filter screen; 3.12. motor; 3.13. third gear; 3.14. second tooth; 3.15. protective shell; 3.16. second gear; 3.17. magnet; 4. air outlet transition section; 5. air outlet noise reduction section. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0017] The present invention provides a high-speed and low-noise centrifugal fan with air filtering effect, such as Figures 1 to 9 As shown, it includes an air inlet 1, one end of the air inlet 1 is connected to a noise reduction box 2, one end of the noise reduction box 2 is connected to an air outlet elbow 3, the end of the air outlet elbow 3 away from the noise reduction box 2 is connected to an air outlet transition section 4, and the end of the air outlet transition section 4 away from the air outlet elbow 3 is connected to an air outlet noise reduction section 5; The noise reduction box 2 includes a noise reduction box body 2.1, a motor vibration reduction rubber pad 2.2, a sealing strip 2.3 on the joint surface of the noise reduction box body and cover, a noise reduction box cover 2.4, sound-absorbing cotton 2.5, a fan assembly 2.6, an elastic flexible connection sleeve 2.7 between the fan air inlet and the box body, a soft connection pad 2.8 between the fan air inlet and the box body, and a load-bearing plate 2.9 connecting the fan air inlet and the box body. The sound-absorbing cotton 2.5 is arranged inside the noise reduction box cover 2.4 and the noise reduction box body 2.1, so that the entire noise reduction box 2 is both sound-absorbing and sound-insulating, and can completely shield sound waves; The air inlet 1 and the air outlet elbow 3 are both elastically connected to the noise reduction box 2.1 and sealed with the noise reduction box 2.1. The noise reduction box 2.1, the sealing strip 2.3 on the joint surface of the noise reduction box cover, and the noise reduction box cover 2.4 form a closed space of the noise reduction box. The noise reduction box 2.1 and the noise reduction box cover 2.4 are connected by a mechanical buckle. The sealing strip 2.3 on the joint surface of the noise reduction box cover is arranged between the noise reduction box 2.1 and the noise reduction box cover 2.4. The fan assembly 2.6 is connected to the noise reduction box 2.1 by three soft connections. A filter component for filtering dust and impurities is arranged in the air inlet 1.

[0018] like Figures 1 to 5 As shown, the fan assembly 2.6 is fixed on the motor vibration reduction rubber pad 2.2 of the motor mounting seat inside the noise reduction box 2.1 through the motor mounting seat. The vibration of the fan assembly 2.6 during operation will not be transmitted to the noise reduction box 2.1 through the base. The fan assembly 2.6 is composed of a motor, a volute, an impeller, a fan air inlet guide, etc. The fan air inlet guide is connected to the fan air inlet and the box elastic soft connection sleeve 2.7, and the fan air inlet and the box elastic soft connection sleeve 2.7 are further connected to the noise reduction box 2.1. The air inlet 1 is connected to the noise reduction box 2.1, and the air inlet 1 is fixed to the fan air inlet and box connection load-bearing plate 2.9 of the noise reduction box 2.1 by the fan air inlet and box soft connection pad 2.8, eliminating the use of the structure in which the air inlet 1 is directly fixed on the fan air inlet deflector. The setting of this soft connection avoids over-positioning in the mechanical connection, and at the same time cuts off the external transmission of vibration and noise on the volute of the fan assembly 2.6, optimizes the force bearing path, and paves the way for lightweight structural design.

[0019] The sound wave shielding of the box structure cannot ignore the small holes and small gaps. Because the fan power drive system is equipped with power lines, control lines, heat dissipation cooling pipes and other pipelines, all of which need to exchange energy, signals and liquids with the outside world, the fan assembly 2.6 is provided with a device wiring 2.15, which passes through the noise reduction box 2.1 and is connected to the noise reduction box 2.1 through a mechanical seal component.

[0020] like Figures 1 to 5As shown, the mechanical seal assembly includes a mechanical seal device fixing nut 2.10, a mechanical seal device body 2.11, a sound-absorbing soft gasket 2.12, a mechanical seal device filled with sound-absorbing material 2.13, and a mechanical seal device filling material fastening nut 2.14. The sound-absorbing soft gasket 2.12 is arranged on the mechanical seal device body 2.11, the mechanical seal device body 2.11 passes through the noise reduction box 2.1, the mechanical seal device fixing nut 2.10 is threadedly connected to the outside of one end of the mechanical seal device body 2.11 passing through the noise reduction box 2.11, the mechanical seal device filling with sound-absorbing material 2.13 is arranged in the mechanical seal device body 2.11, the equipment wiring 2.15 passes through the mechanical seal device filling with sound-absorbing material 2.13, and the mechanical seal device filling material fastening nut 2.14 is threadedly connected to the outside of the mechanical seal device body 2.11.

[0021] When installing the mechanical seal body 2.11, the sound-absorbing soft gasket 2.12 must be placed on the mechanical seal body 2.11 first, and the fixed end of the mechanical seal body 2.11 is threaded through the plate, and the fixing nut 2.10 is tightened; after the pipeline to be fixed passes through the mechanical seal and is filled with sound-absorbing material 2.13, it is inserted into the mechanical seal body 2.11 together, and finally the filling material fastening nut 2.14 is tightened. This small device is convenient and flexible to assemble, has a good sealing effect, and is easy to repair and disassemble.

[0022] In order to reduce the space occupied by the fan assembly 2.6 and to facilitate the connection between the air outlet and the fan volute, the fan assembly 2.6 uses a right-angled air outlet for guidance in structure, rather than directly discharging it to the outside and then rolling up the garbage on the ground to fly everywhere and pollute the atmosphere.

[0023] like Figures 1 to 5 As shown, an opening is provided on one side of the noise reduction box 2.1, one end of the air outlet elbow 3 is connected to an air outlet vibration damping sealing pad 2.17 through an air outlet elbow flange plate 2.19, the end of the air outlet vibration damping sealing pad 2.17 away from the air outlet elbow flange plate 2.19 is connected to the volute air outlet 2.16, a noise reduction box bottom plate 2.18 is provided in the opening, and the air outlet vibration damping sealing pad 2.17 is inserted into the noise reduction box bottom plate 2.18.

[0024] like Figures 1 to 5 As shown, a sound-absorbing and vibration-reducing sealing strip with a rectangular cross-section is fixed to the air outlet elbow flange plate 2.19.

[0025] The sanitation cleaning vehicle equipped with the high-speed centrifugal fan assembly of the present invention can achieve the following cleaning operation effects: 1. Box-type assembly, modular design, simple physical interface with the vehicle, no need for centralized assembly on the washing machine, can be assembled as parts in a dispersed manner, easy to install and debug; 2. Under the same working conditions, the noise level of the enhanced gear operation has been reduced from the original 86db to the current 78db, a decrease of 6db; in particular, the suppression of high-frequency noise has greatly improved the comfort of the drivers and passengers in the cab; 3. Compared with the original fan, the high-speed and low-noise centrifugal fan occupies a space of 1.85m 3 Down to now 1.27m 3 , compared with the original fan, the space requirement is reduced by 31%; 4. Under the same working conditions as the walking speed of 5km / h, the suction capacity during cleaning operation is increased from the original 1000g / m 2 , increased to the current 1600g / m 2 ; When strengthening the cleaning operation, any heavily polluted road surface can be cleaned once and for all to achieve a level of cleanliness that can be sat on the ground; 5. Under the attraction of the fan assembly 2.6, the airflow from the outlet of the garbage bin of the washing and sweeping vehicle enters the air inlet of the fan through the flow channel; 6. In the air inlet of the fan assembly 2.6, the airflow passes through a closed 90-degree turn and enters the fan inlet guide; 7. In the impeller, when the gas passes through the blades of the rotating impeller, the speed is increased, and energy is obtained from the blades, and the static pressure and kinetic energy are increased; as the gas obtains more energy from the blades, the gas is thrown out from the impeller flow outlet by the impeller and enters the volute. The volute space is relatively large, the gas speed entering the volute is reduced, and the static pressure is increased. This process generates a lot of high-frequency airflow noise, as well as high-frequency mechanical noise and high-frequency electromagnetic noise when the fan motor is running; 8. Since the fan assembly is installed in a closed box, and there are sound insulation and noise reduction devices in the box, the noise cannot be transmitted to the outside air through vibration, radiation, etc.; 9. After the airflow comes out of the volute, it enters the air outlet of the fan. The airflow is smoothly turned in the air outlet elbow, and the noise is also reduced; 10. After being turned, the airflow enters the transition section of the fan assembly and the noise reduction section of the air outlet. Most of the noise is absorbed by the sound-absorbing material and attenuated by the resonance chamber. The noise of the outgoing airflow is reduced to a standard that meets environmental protection requirements.

[0026] like Figures 6 to 9As shown, the filter assembly includes a filter frame 3 fixedly connected to the inside of the air inlet 1, a filter 3.11 is arranged inside the filter frame 3, a first annular groove and a second annular groove are provided on the front side of the filter frame 3, the diameter of the first annular groove is larger than that of the second annular groove, a ring plate 3.1 is rotatably installed in the first annular groove, a groove is provided on the front side of the ring plate 3.1, a slide plate 3.2 is slidably installed in the groove, the slide plate 3.2 is fixedly connected to the inner wall of the groove through a plurality of springs 3.10, a mounting plate 3.3 is provided on the front side of the slide plate 3.2, the mounting plate 3.3 and the slide plate 3.2 are connected by bolts 3.4, a roller 3.5 is symmetrically rotatably installed on the mounting plate 3.3, a hair-sticking roll paper 3.6 is rolled up on the roller 3.5 close to the filter 3.11, the other end of the hair-sticking roll paper 3.6 is adhered to another roller 3.5, and the outer side of the hair-sticking roll paper 3.6 is in conflict with the filter 3.11, The outsides of the two rollers 3.5 are fixedly sleeved with a first gear 3.7, between the two first gears 3.7 is provided a second gear 3.16 meshing with them, the second gear 3.16 is rotatably connected to the mounting plate 3.3 through a rotating shaft, a circular ring 3.8 is slidably provided in the second annular groove, and the outer side of the circular ring 3.8 is equidistantly surrounded by first teeth meshing with the first gear 3.7, an electric push rod 3.9 is symmetrically fixedly installed on the rear side of the filter frame 3, the telescopic end of the electric push rod 3.9 is fixedly connected to the circular ring 3.8, and the front side of the ring plate 3.1 is equidistantly surrounded by second teeth 3.14, and the outside of the air inlet 1 is fixedly installed with a motor 3.12, and the output shaft of the motor 3.12 extends to the air inlet 1 and is fixedly connected with a third gear 3.13 meshing with the second teeth 3.14, and the size of the second annular groove can support the first gear 3.7 to extend into the second annular groove.

[0027] When in use, the fan assembly 2.6 is started to inhale, and the air inhaled through the air inlet 1 is filtered out of dust and impurities through the filter 3.11. By filtering the dust and impurities, the impurities can be prevented from entering the fan assembly 2.6, thereby protecting the fan assembly 2.6. When the fan assembly 2.6 stops being used, the motor 3.12 is started to make its output shaft rotate with the third gear 3.13, and cooperate with the second tooth 3.14 to drive the ring plate 3.1 to rotate, and the ring plate 3.1 moves with the slide plate 3.2, the mounting plate 3.3, and the roller 3.5. With the movement of the roller 3.5, the first gear 3.7 connected to it moves, and the first gear 3.7 moves along the second gear 3.14. One tooth moves, causing itself to rotate, so that the second gear 3.16 and the other first gear 3.7 rotate forward with the two rollers 3.5. At this time, the lower roller 3.5 rolls along the surface of the filter 3.11 and releases the hair-sticking paper 3.6, so that the adhesive surface of the hair-sticking paper 3.6 passes through the surface of the filter 3.11 and is squeezed by the roller 3.5, so that the impurities blocked in the mesh of the filter 3.11 are sticked out, so that the impurities adhere to the hair-sticking paper 3.6, and then are rolled up by another roller 3.5. With the continuous rotation of the ring plate 3.1, the roller 3.5 continuously moves along the surface of the filter 3.11, and cooperates with the hair-sticking paper 3.6 to stick the filter The impurities in the mesh of 3.11 are stuck out and then rolled up on another roller 3.5, so that the filter 3.11 is continuously cleaned, and the cleaning and collection of impurities are realized. Moreover, by sticking out the impurities, the impurities can be cleaned more thoroughly. With the movement of the roller 3.5, the hair-sticking roll paper 3.6 is continuously consumed, so that the hair-sticking roll paper 3.6 on the roller 3.5 that conflicts with the filter 3.11 is continuously reduced. In the whole process, the electric push rod 3.9 is continuously shortened, and the shortening speed of the electric push rod 3.9 corresponds to the consumption speed of the hair-sticking roll paper 3.6, so that the ring 3.8 moves accordingly, so that the first tooth moves away from the first gear 3.7. The spring 3.10 that is stretched and deformed is continuously shortened, and the slide plate 3.2 is moved accordingly, so that the roller 3.5 is moved accordingly toward the filter screen 3.11, so that the sticky hair roll paper 3.6 on the roller 3.5 is always kept in contact with the filter screen 3.11, and the meshing state of the first gear 3.7 and the first tooth is kept by the continuous shortening of the electric push rod 3.9 and the shortening of the spring 3.10. After the cleaning is completed, the motor 3.12 is turned off, and the above operation is repeated to clean the filter screen 3.11 after the fan assembly 2.6 is used next time, so that the filter screen 3.11 can be kept unobstructed before each use, so as to ensure the normal filtration; By removing the bolt 3.4, the mounting plate 3.3 is disassembled and taken out, so that the lint-removing roller paper 3.6 above can be easily replaced.

[0028] like Figure 7As shown, a protective shell 3.15 is provided on the outer side of the rotating roller 3.5 close to the filter screen 3.11, and the protective shell 3.15 covers the unused part of the lint-sticking roller paper 3.6. A magnet 3.17 is fixedly connected to one side of the protective shell 3.15. The mounting plate 3.3 is made of iron, and one end of the magnet 3.17 is adsorbed and fixed on the mounting plate 3.3.

[0029] The unused part of the lint-removing roller paper 3.6 is shielded by the protective shell 3.15, so as to prevent the lint-removing roller paper 3.6 from being contaminated by a large area of ​​dust and impurities before it contacts the filter screen 3.11, thereby ensuring the use effect of the lint-removing roller paper 3.6.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A high-speed, low-noise centrifugal fan with air filtering effect, comprising an air inlet (1), characterized in that: One end of the air inlet (1) is connected to a noise reduction box (2), one end of the noise reduction box (2) is connected to an air outlet elbow (3), one end of the air outlet elbow (3) away from the noise reduction box (2) is connected to an air outlet transition section (4), and one end of the air outlet transition section (4) away from the air outlet elbow (3) is connected to an air outlet noise reduction section (5); The noise reduction box (2) comprises a noise reduction box body (2.1), a motor vibration reduction rubber pad (2.2), a sealing strip (2.3) for the joint surface of the noise reduction box body and the box cover, a noise reduction box cover (2.4), sound-absorbing cotton (2.5), a fan assembly (2.6), an elastic flexible connection sleeve between the fan air inlet and the box body (2.7), a flexible connection pad between the fan air inlet and the box body (2.8), and a load-bearing plate (2.9) for connecting the fan air inlet and the box body. The air inlet (1) and the air outlet elbow (3) are both elastically connected to the noise reduction box (2.1) and are sealed to the noise reduction box (2.1); the noise reduction box (2.1), the sealing strip (2.3) on the joint surface of the noise reduction box cover, and the noise reduction box cover (2.4) form a closed space of the noise reduction box; the noise reduction box (2.1) and the noise reduction box cover (2.4) are connected by a mechanical buckle; the sealing strip (2.3) on the joint surface of the noise reduction box cover is arranged between the noise reduction box (2.1) and the noise reduction box cover (2.4); the fan assembly (2.6) is connected to the noise reduction box (2.1) by three flexible connections; and a filter component for filtering dust and impurities is arranged in the air inlet (1).

2. The high-speed, low-noise centrifugal fan with air filtering effect according to claim 1, characterized in that: The fan assembly (2.6) is fixed to the motor vibration reduction rubber pad (2.2) of the motor mounting seat inside the noise reduction box (2.1) through the motor mounting seat. The fan assembly (2.6) is composed of a motor, a volute, an impeller, and a fan air inlet deflector. The fan air inlet deflector is connected to the fan air inlet and box elastic soft connection sleeve (2.7). The fan air inlet and box elastic soft connection sleeve (2.7) is further connected to the noise reduction box (2.1). The air inlet (1) is fixed to the fan air inlet and box connection load-bearing plate (2.9) of the noise reduction box (2.1) by the fan air inlet and box soft connection pad (2.8).

3. The high-speed, low-noise centrifugal fan with air filtering effect according to claim 2, characterized in that: The fan assembly (2.6) is provided with a device wiring (2.15), the device wiring (2.15) passes through the noise reduction box (2.1), and the device wiring (2.15) is connected to the noise reduction box (2.1) through a mechanical seal component.

4. The high-speed, low-noise centrifugal fan with air filtering effect according to claim 3, characterized in that: The mechanical seal assembly comprises a mechanical seal fixing nut (2.10), a mechanical seal body (2.11), a sound-absorbing soft gasket (2.12), a mechanical seal filling sound-absorbing material (2.13), and a mechanical seal filling material fastening nut (2.14); the sound-absorbing soft gasket (2.12) is arranged on the mechanical seal body (2.11); the mechanical seal body (2.11) passes through a noise reduction box (2.1); the mechanical seal fixing nut (2.10) is threadedly connected to the outside of one end of the mechanical seal body (2.11) passing through the noise reduction box (2.11); the mechanical seal filling sound-absorbing material (2.13) is arranged in the mechanical seal body (2.11); the equipment wiring (2.15) passes through the mechanical seal filling sound-absorbing material (2.13); and the mechanical seal filling material fastening nut (2.14) is threadedly connected to the outside of the mechanical seal body (2.11).

5. The high-speed, low-noise centrifugal fan with air filtering effect according to claim 4, characterized in that: An opening is provided on one side of the noise reduction box (2.1); one end of the air outlet elbow (3) is connected to an air outlet vibration damping sealing pad (2.17) via an air outlet elbow flange plate (2.19); one end of the air outlet vibration damping sealing pad (2.17) away from the air outlet elbow flange plate (2.19) is connected to a volute air outlet (2.16); a noise reduction box bottom plate (2.18) is provided in the opening; and the air outlet vibration damping sealing pad (2.17) is plugged into the noise reduction box bottom plate (2.18).

6. The high-speed, low-noise centrifugal fan with air filtering effect according to claim 5, characterized in that: A sound-absorbing and vibration-reducing sealing strip with a rectangular cross-section is fixed to the air outlet elbow flange plate (2.19).

7. The high-speed, low-noise centrifugal fan with air filtering effect according to claim 6, characterized in that: The filter assembly comprises a filter frame (3) fixedly connected to the inside of the air inlet (1), a filter (3.11) being arranged inside the filter frame (3), a first annular groove and a second annular groove being arranged on the front side of the filter frame (3), the diameter of the first annular groove being larger than that of the second annular groove, a ring plate (3.1) being rotatably mounted in the first annular groove, a groove being arranged on the front side of the ring plate (3.1), a slide plate (3.2) being slidably mounted in the groove, and the slide plate (3.2) being arranged by a plurality of springs. (3.10) is fixedly connected to the inner wall of the groove, a mounting plate (3.3) is provided on the front side of the slide plate (3.2), the mounting plate (3.3) and the slide plate (3.2) are connected by bolts (3.4), a roller (3.5) is symmetrically mounted on the mounting plate (3.3), a hair-sticking roll paper (3.6) is rolled up on the outside of the roller (3.5) close to the filter screen (3.11), and the other end of the hair-sticking roll paper (3.6) is adhered to another roller (3.5). The outer side of the two rollers (3.5) contacts the filter screen (3.11), the outer sides of the two rollers (3.5) are fixedly sleeved with a first gear (3.7), a second gear (3.16) meshing with the two first gears (3.7) is provided between the two first gears (3.7), the second gear (3.16) is rotatably connected to the mounting plate (3.3) via a rotating shaft, a circular ring (3.8) is slidably provided in the second annular groove, and a second gear (3.8) meshing with the first gear (3.7) is equidistantly provided around the outer side of the circular ring (3.8). A tooth, an electric push rod (3.9) is symmetrically fixedly mounted on the rear side of the filter frame (3), the telescopic end of the electric push rod (3.9) is fixedly connected to the ring (3.8), the front side of the ring plate (3.1) is equidistantly surrounded by a second tooth (3.14), the outside of the air inlet (1) is fixedly mounted with a motor (3.12), the output shaft of the motor (3.12) extends into the air inlet (1) and is fixedly connected to a third gear (3.13) meshing with the second tooth (3.14).

8. The high-speed, low-noise centrifugal fan with air filtering effect according to claim 7, characterized in that: A protective shell (3.15) is provided on the outer side of the rotating roller (3.5) close to the filter screen (3.11), the protective shell (3.15) shields the unused portion of the lint-sticking roller paper (3.6), a magnet (3.17) is fixedly connected to one side of the protective shell (3.15), the mounting plate (3.3) is made of iron, and one end of the magnet (3.17) is adsorbed and fixed on the mounting plate (3.3).

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