High efficiency, energy saving and environmental protection centrifugal fan
By designing a cleaning mechanism for the multi-layered filter components and push rod spring coordination in the centrifugal fan, the problems of smoke and dust emission and filter components are solved, and efficient and environmentally friendly exhaust effect is achieved.
Patent Information
- Application Number
- CN202510083283.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-04-08
AI Technical Summary
During the exhaust process of existing centrifugal fans, smoke and dust cause secondary pollution to the external environment, and the filter components are prone to blockage, affecting the normal operation of the equipment.
A high-efficiency, energy-saving and environmentally friendly centrifugal fan is designed, and a multi-layer filtering component is adopted, including a first filter plate and a plurality of second filter plates. Through the cooperation of the push rod and the spring, the filtering component can be moved inward and outward, cleaned up attachments and maintained the filtering effect.
It effectively avoids secondary pollution of smoke and dust on the external environment, extends the service life of filter components, and improves the operating efficiency and environmental performance of the equipment.
Smart Images
Figure CN119778324A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of centrifugal fans, and in particular relates to a centrifugal fan with high efficiency, energy saving and environmental protection. Background Art
[0002] A centrifugal fan is an air mechanical device, mainly composed of an air inlet, a centrifugal impeller, an outlet, a driving device, etc. Its working principle is to draw outside air into the impeller to accelerate the movement, and then eject it through the outlet, thereby forming a strong wind effect. In the prior art, in the daily exhaust work of the factory, in the workshop with large smoke and dust, daily exhaust is particularly important. When the smoke and dust are discharged to the outside, the smoke and dust will cause secondary pollution to the external environment, and the attachments in the smoke and dust will adhere to the filter components, and long-term use will cause the filter components to be blocked.
[0003] Therefore, it is necessary to invent a high-efficiency, energy-saving and environmentally friendly centrifugal fan to solve the above problems. Summary of the invention
[0004] In view of the above problems, the present invention provides a high-efficiency, energy-saving and environmentally friendly centrifugal fan to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a centrifugal fan with high efficiency, energy saving and environmental protection, comprising a shell, a front side surface of the shell is provided with an air inlet, a bracket is installed on the rear side surface of the shell, a motor is installed on the top of the bracket, a fan blade is arranged inside the shell, and the center of the fan blade is transmission-connected to the output end of the motor, an exhaust port is arranged on one side of the shell, and an exhaust frame is fixed at the position of the exhaust port, an external air duct is connected to the exhaust frame, two filter components are installed on the inner side of the exhaust port, and the two filter components are symmetrically arranged up and down with the plane where the center line of the exhaust frame is located as the axial plane, the filter component comprises a first filter plate, a plurality of second filter plates are arranged on the inner side surface of the first filter plate, and the plurality of second filter plates are arranged in a stepped manner on the inner side surface of the exhaust port, inner plates are provided on both inner side walls of the exhaust port, end faces of the first filter plate and the second filter plate are in contact with the inner side surface of the inner plate, a baffle is fixed on the inner side of the inner plate, and the baffle cooperates to limit the second filter plate, and the wind discharged from the exhaust port is filtered by the two filter components in cooperation with each other.
[0006] Furthermore, a side frame is fixed to the outer side surface of the second filter plate, side strips are arranged on the top of both sides of the top side frame, vertical rods are fixed to the outer side of the bottom surface of the side strips, grooves corresponding to the side strips are arranged on both sides of the top surface of the first filter plate and both sides of the top surface of the second filter plate, through grooves corresponding to the vertical rods are arranged on the inner side of the grooves, and a first spring is sleeved on the surface of the vertical rod, one end of the first spring is connected to the side strip, and the other end of the first spring is connected to the inner side of the groove.
[0007] Furthermore, the top filter component utilizes the top surface of the innermost second filter plate to fit with the inner top surface of the exhaust port, and the bottom filter component utilizes the bottom surface of the innermost second filter plate to fit with the inner bottom surface of the exhaust port. Both sides of the innermost second filter plate are fixed with spring plates, and the inner end surface of the spring plates fits with the outer side surface of the baffle.
[0008] Furthermore, protrusions are fixed on both sides of the outer side of the first filter plate, two push rods are arranged on the outer side of the first filter plate, the two push rods correspond to the two protrusions one by one, and slots corresponding to the protrusions are arranged at the inner ends of the push rods. Screws penetrate both sides of the first filter plate, and the push rods are connected to the first filter plate by means of the screws, and a push plate is arranged on the outer side of the first filter plate, and the push plate is installed on the outer end of the push rod by means of bolts.
[0009] Furthermore, a side plate is arranged inside the outer circumferential surface of the push rod, and an inner surface of the inner plate is provided with an inclined groove corresponding to the side plate. When the push rod moves, the moving push rod drives the side plate to move inside the inclined groove.
[0010] Furthermore, a plurality of rings are provided on the inner side of the exhaust frame, and the plurality of rings correspond to the plurality of push rods one by one, and the rings are correspondingly sleeved on the surfaces of the push rods, and the outer side surface of the ring circumference is connected to the rotating block by means of a telescopic component, and an insertion rod penetrating the exhaust frame is fixed to the inner side surface of the rotating block, and a nut is spirally sleeved on the inner end of the insertion rod, and the spiral cooperation between the nut and the insertion rod allows the rotating block to rotate around the insertion rod as the axis, and the outer side surface of the ring circumference fits with the inner wall of the exhaust port.
[0011] Furthermore, the telescopic component includes a slide rod and a slide frame, the inner end of the slide rod is fixedly connected to the ring, the outer end of the slide rod is movably inserted into the inner end of the slide frame, and the outer end of the slide frame is fixedly connected to the rotating block.
[0012] Furthermore, a second spring is sleeved on the surface of the slide frame, the outer end of the second spring is connected to the rotating block, a protrusion is fixed to the outer end of the slide rod, a sliding groove corresponding to the protrusion is provided on the surface of the slide frame, and the inner end of the second spring is connected to the protrusion.
[0013] Technical effects and advantages of the present invention: 1. The present invention pushes the push rod, and under the sliding cooperation of the side plate and the inclined groove, when the first filter plate pushes the plurality of second pull plates to move inward, the side blocks cooperate to scrape the attachments on the inner sides of the first filter plate and the second filter plate until the two filter components are separated, and the wind discharged through the exhaust port can blow out the attachments on the inner side of the exhaust port, avoiding excessive attachments to the inner sides of the first filter plate and the second filter plate, thereby ensuring the quickness of the attachment cleaning.
[0014] 2. In the present invention, the push rod is moved outward, and the elastic force of the second spring causes the top collar to move downward and the bottom collar to move upward. At the same time, the elastic force of the first spring arranges the first filter plate and multiple second filter plates in a stepped manner on the inside of the exhaust port, so that the two filter components cooperate to block the exhaust port. After quickly cleaning the attachments on the inner sides of the first filter plate and the second filter plate, the first filter plate and the second filter plate can cooperate to continue to provide a continuous filtering effect for the exhaust port, and there is no need to replace the first filter plate and the second filter plate inside the exhaust port too often. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 2 is a schematic diagram of the front side of a centrifugal fan for high-efficiency energy-saving and environmentally friendly treatment according to an embodiment of the present invention; Figure 2 2 is a schematic diagram of the rear side of a high-efficiency energy-saving and environmentally friendly centrifugal fan according to an embodiment of the present invention; Figure 3 is a symmetrical schematic diagram of two filter components inside the air inlet of an embodiment of the present invention; Figure 4 Schematic diagram of a fixed exhaust frame of an exhaust port of a housing according to an embodiment of the present invention; Figure 5 is an overall schematic diagram of a filter component according to an embodiment of the present invention; Figure 6 The embodiment of the present invention Figure 5 A magnified view of the structure of part A; Figure 7 2 is a schematic diagram of a sleeve according to an embodiment of the present invention connecting a rotating block by using a telescopic component; In the figure: 1. shell; 2. air inlet; 3. bracket; 4. motor; 5. exhaust frame; 6. first filter plate; 7. second filter plate; 8. inner plate; 9. baffle; 10. side frame; 11. vertical rod; 12. groove; 13. first spring; 14. spring piece; 15. protrusion; 16. push rod; 17. screw rod; 18. push plate; 19. side plate; 20. inclined groove; 21. collar; 22. rotating block; 23. plug rod; 24. nut; 25. slide rod; 26. slide frame; 27. second spring; 28. protrusion. 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 centrifugal fan with high efficiency, energy saving and environmental protection. Figures 1 to 4As shown, it includes a shell 1, an air inlet 2 is arranged on the front side of the shell 1, a bracket 3 is installed on the rear side of the shell 1, a motor 4 is installed on the top of the bracket 3, a fan blade is arranged inside the shell 1, and the center of the fan blade is transmission-connected to the output end of the motor 4, an exhaust port is arranged on one side of the shell 1, and an exhaust frame 5 is fixed at the position of the exhaust port, the external air duct is connected to the exhaust frame 5, two filter components are installed on the inner side of the exhaust port, and the two filter components are symmetrically arranged up and down with the plane where the center line of the exhaust frame 5 is located as the axial plane, the filter component includes a first filter plate 6, a plurality of second filter plates 7 are arranged on the inner side of the first filter plate 6, and the plurality of second filter plates 7 are arranged in a stepped manner on the inner side of the exhaust port, and inner plates 8 are arranged on both inner side walls of the exhaust port, the end faces of the first filter plate 6 and the second filter plate 7 are fitted with the inner side of the inner plate 8, a baffle 9 is fixed on the inner side of the inner plate 8, and the baffle 9 cooperates to limit the second filter plate 7, and the wind discharged from the exhaust port is filtered by the two filter components. The first filter plates 6 of the two filtering components are in corresponding contact, the bottom surface of the first filter plate 6 on the top is fitted with the top surface of the first filter plate 6 on the bottom, the first filter plate 6 and the second filter plate 7 cooperate with the inner plate 8 to block the exhaust port, start the motor 4, and the fan blades at the output end of the motor 4 rotate inside the shell 1. The rotating fan blades pass the external smoke and dust into the shell 1 through the air inlet 2. When the external smoke and dust pass through the exhaust port, the two filtering components use the first filter plate 6 and the second filter plate 7 to filter the smoke and dust, and the filtered wind is exhausted to the external air duct through the exhaust frame 5, completing the filtering treatment of the smoke and dust, avoiding the external smoke and dust from scattering, and using the filtering components to filter the smoke and dust, while ensuring the environmental protection effect, it can also avoid excessive resources being wasted on smoke and dust filtering, thereby ensuring the environmental protection treatment effect of the smoke and dust.
[0018] exist Figure 3 , Figure 5 and Figure 6In the figure, a side frame 10 is fixed to the outer side surface of the second filter plate 7, side strips are arranged on the top of both sides of the top side frame 10, and a vertical rod 11 is fixed to the outer side of the bottom surface of the side strips, grooves 12 corresponding to the side strips are arranged on both sides of the top surface of the first filter plate 6 and both sides of the top surface of the second filter plate 7, and through grooves corresponding to the vertical rod 11 are arranged on the inner side of the groove 12, and a first spring 13 is sleeved on the surface of the vertical rod 11, one end of the first spring 13 is connected to the side strip, and the other end of the first spring 13 is connected to the inner side of the groove 12. The second filter plate 7 at the innermost part utilizes the side frame 10 to fit with the inner side surface of the second filter plate 7 at the outer part, and the second filter plate 7 at the outermost part utilizes the side frame 10 to fit with the inner side surface of the first filter plate 6. When the first filter plate 6 is in a limited state, the elastic force of the first spring 13 utilizes the side strips to arrange the multiple second filter plates 7 in a stepped manner until the innermost second filter plate 7 corresponds to the inner top surface or bottom surface of the exhaust port. The elastic force of the first spring 13 enables the two filter components to block the exhaust port accordingly. At this time, the top filter component utilizes the top surface of the innermost second filter plate 7 to fit with the inner top surface of the exhaust port, and the bottom filter component utilizes the bottom surface of the innermost second filter plate 7 to fit with the inner bottom surface of the exhaust port. Both sides of the innermost second filter plate 7 are fixed with spring plates 14, and the inner end surface of the spring plates 14 fits with the outer side surface of the baffle 9. When the first filter plate 6 pushes the second filter plate 7 to move inward, the inner side surface of the innermost second filter plate 7 gradually approaches the baffle 9, and the moving second filter plate 7 cooperates with the baffle 9 to squeeze the spring sheet 14, and the elastic force of the spring sheet 14 is used to prevent the inner side surface of the second filter plate 7 from directly impacting the outer side surface of the baffle 9. The elastic force of the spring sheet 14 is used for buffering, so as to prevent the baffle 9 and the second filter plate 7 from being damaged by the impact.
[0019] exist Figures 2 to 6 In the embodiment, protrusions 15 are fixed on both sides of the outer side of the first filter plate 6, two push rods 16 are arranged on the outer side of the first filter plate 6, the two push rods 16 correspond to the two protrusions 15 one by one, and a slot corresponding to the protrusion 15 is arranged on the inner side of the push rod 16, screws 17 are passed through both sides of the first filter plate 6, and the push rod 16 is connected to the first filter plate 6 by the screws 17, and a push plate 18 is arranged on the outer side of the first filter plate 6, and the push plate 18 is installed on the outer side of the push rod 16 by bolts. A side plate 19 is arranged inside the outer side of the circumference of the push rod 16, and an inclined groove 20 corresponding to the side plate 19 is arranged on the inner side of the inner plate 8, and when the push rod 16 moves, the moving push rod 16 drives the side plate 19 to move inside the inclined groove 20. When the push plate 18 is pushed inward, the inwardly moving push plate 18 uses the two push rods 16 to push the first filter plate 6 inward. Since the first filter plate 6 is fixedly mounted on the inner end of the push rod 16 by the screw 17, and the side plate 19 on the inner side of the push rod 16 is slidably matched with the inclined groove 20.
[0020] When the push rod 16 at the top uses the side plate 19 to slide on the inner side of the inclined groove 20, the limitation of the inclined groove 20 makes the side plate 19 move up on the inner side of the exhaust port, and the upward push rod 16 drives the first filter plate 6 to move up synchronously. At this time, when the inwardly moved first filter plate 6 pushes the second filter plate 7 to move inward, the first filter plate 6 uses the through groove to move up on the surface of the vertical rod 11, and the side strips of the first filter plate 6 and the second filter plate 7 cooperate to squeeze the first spring 13, and the first filter plate 6 and the second filter plate 7 are misaligned and moved. The second filter plate 7 uses the front side of the side frame 10 to scrape the attachments on the rear side of the first filter plate 6 until the top surfaces of the first filter plate 6 and the second filter plate 7 are in contact with the inner top surface of the exhaust port. The first filter plate 6 passes through the second filter plate 7 to make the inner multiple second filter plates 7 move up during the inward movement until the top surfaces of the multiple second filter plates 7 are in a flush state. At this time, the side frame 10 cooperates to scrape the attachments on the rear sides of the multiple second filter plates 7, and the first filter plate 6 squeezes the spring sheet 14 through the multiple second filter plates 7. Similarly, the push rod 16 at the bottom utilizes the sliding cooperation between the side plate 19 and the inclined groove 20. When the first filter plate 6 pushes the second filter plate 7 to move inward, the first filter plate 6 utilizes the side strips to move the multiple second filter plates 7 downward until the bottom surfaces of the first filter plate 6 and the multiple second filter plates 7 are in contact with the bottom surface of the inner side of the exhaust port. At this time, the exhaust port is in an unobstructed state, and the wind discharged through the exhaust port can blow out the attachments on the inner side of the exhaust port, avoiding excessive attachments to the inner surfaces of the first filter plate 6 and the second filter plate 7.
[0021] Among them, a cylinder can be installed on the inner wall of the exhaust frame 5, and the outer side of the push plate 18 is connected to the cylinder output end. The cylinder and the motor 4 are both externally connected to a controller, and the controller is used to control the operation of the cylinder, which is convenient for real-time cleaning of attachments on the inner sides of the first filter plate 6 and the second filter plate 7.
[0022] exist Figure 2 and Figures 5 to 7 In the embodiment, a plurality of collars 21 are arranged on the inner side of the exhaust frame 5, and the plurality of collars 21 correspond to the plurality of push rods 16 one by one. The collars 21 are correspondingly sleeved on the surface of the push rods 16. The outer circumferential side of the collar 21 is connected to the rotating block 22 by a telescopic component. The inner side of the rotating block 22 is fixed with an insertion rod 23 that penetrates the exhaust frame 5. The inner end of the insertion rod 23 is spirally sleeved with a nut 24. The spiral cooperation between the nut 24 and the insertion rod 23 allows the rotating block 22 to rotate around the insertion rod 23 as the axis, and the outer circumferential side of the collar 21 is in contact with the inner wall of the exhaust port. The rotating block 22 is in contact with the inner side of the exhaust frame 5, and the nut 24 is used to cooperate with the insertion rod 23 that penetrates the inner side of the exhaust frame 5, so that the rotating block 22 can rotate on the inner side of the exhaust frame 5 by using the insertion rod 23.
[0023] The telescopic component includes a slide bar 25 and a slide frame 26. The inner end of the slide bar 25 is fixedly connected to the collar 21, and the outer end of the slide bar 25 is movably inserted into the inner end of the slide frame 26. The outer end of the slide frame 26 is fixedly connected to the rotating block 22. A second spring 27 is sleeved on the surface of the slide frame 26, and the outer end of the second spring 27 is connected to the rotating block 22. A convex piece 28 is fixed to the outer end of the slide bar 25. A sliding groove corresponding to the convex piece 28 is provided on the surface of the slide frame 26, and the inner end of the second spring 27 is connected to the convex piece 28. The push rod 16 moves upward on the inner side of the exhaust frame 5, and the upward push rod 16 drives the collar 21 to move upward synchronously. Since the first filter plate 6 limits the push rod 16 with the screw 17, the push rod 16 is prevented from deflecting during the upward movement. The upward collar 21 moves upward on the inner wall of the exhaust port driven by the push rod 16, and the upward collar 21 uses the telescopic component to make the rotating block 22 rotate with the insertion rod 23. The upward collar 21 approaches the rotating block 22, and the collar 21 makes the sliding rod 25 gradually enter the inner side of the sliding frame 26. The moving sliding rod 25 uses the protruding piece 28 to squeeze the second spring 27 on the surface of the sliding frame 26 until the exhaust port is in a smooth state.
[0024] When the push rod 16 moves outward, the elastic force of the second spring 27 causes the slide bar 25 to move out of the slide frame 26, and the distance between the collar 21 and the rotating block 22 gradually increases. At this time, the top collar 21 moves downward and the bottom collar 21 moves upward. At the same time, the elastic force of the first spring 13 arranges the first filter plate 6 and multiple second filter plates 7 in a stepped manner on the inside of the exhaust port, which facilitates the two filter components to cooperate in blocking the exhaust port. After quickly cleaning the attachments on the inner sides of the first filter plate 6 and the second filter plate 7, the first filter plate 6 and the second filter plate 7 can cooperate to continue to provide a continuous filtering effect for the exhaust port, and there is no need to replace the first filter plate 6 and the second filter plate 7 inside the exhaust port too often.
[0025] Working principle of the present invention: Reference Figures 1 to 7 As shown, the motor 4 is started, and the fan blades at the output end of the motor 4 rotate inside the shell 1. The rotating fan blades pass the external smoke and dust into the shell 1 through the air inlet 2. When the external smoke and dust pass through the exhaust port, the two filter components use the first filter plate 6 and the second filter plate 7 to filter the smoke and dust. The filtered wind is exhausted to the external air duct through the exhaust frame 5, completing the filtering process of the smoke and dust to prevent the external smoke and dust from scattering. The smoke and dust are filtered by the filter components. After the entire centrifugal fan has been used for a period of time, when the push plate 18 is pushed inward, the inwardly moving push plate 18 uses two push rods 16 to push the first filter plate 6 inward. Since the first filter plate 6 is fixedly installed on the inner end of the push rod 16 by the screw 17, and the side plate 19 on the inner side of the push rod 16 is slidably matched with the inclined groove 20.
[0026] When the push rod 16 at the top uses the side plate 19 to slide on the inner side of the inclined groove 20, the limitation of the inclined groove 20 makes the side plate 19 move up on the inner side of the exhaust port, and the upward push rod 16 drives the first filter plate 6 to move up synchronously. At this time, when the inwardly moved first filter plate 6 pushes the second filter plate 7 to move inward, the first filter plate 6 uses the through groove to move up on the surface of the vertical rod 11, and the side strips of the first filter plate 6 and the second filter plate 7 cooperate to squeeze the first spring 13, and the first filter plate 6 and the second filter plate 7 are misaligned and moved. The second filter plate 7 uses the front side of the side frame 10 to scrape the attachments on the rear side of the first filter plate 6 until the top surfaces of the first filter plate 6 and the second filter plate 7 are in contact with the inner top surface of the exhaust port. The first filter plate 6 passes through the second filter plate 7 to make the inner multiple second filter plates 7 move up during the inward movement until the top surfaces of the multiple second filter plates 7 are in a flush state. At this time, the side frame 10 cooperates to scrape the attachments on the rear sides of the multiple second filter plates 7, and the first filter plate 6 squeezes the spring sheet 14 through the multiple second filter plates 7. Similarly, the push rod 16 at the bottom utilizes the sliding cooperation between the side plate 19 and the inclined groove 20. When the first filter plate 6 pushes the second filter plate 7 to move inward, the first filter plate 6 utilizes the side strips to move the multiple second filter plates 7 downward until the bottom surfaces of the first filter plate 6 and the multiple second filter plates 7 are in contact with the bottom surface of the inner side of the exhaust port. At this time, the exhaust port is in an unobstructed state, and the wind discharged through the exhaust port can blow out the attachments on the inner side of the exhaust port, avoiding excessive attachments to the inner surfaces of the first filter plate 6 and the second filter plate 7.
[0027] The push rod 16 moves upward on the inner side of the exhaust frame 5, and the upward push rod 16 drives the collar 21 to move upward synchronously. Since the first filter plate 6 limits the push rod 16 with the screw 17, the push rod 16 is prevented from deflecting during the upward movement. The upward collar 21 moves upward on the inner wall of the exhaust port driven by the push rod 16, and the upward collar 21 uses the telescopic component to make the rotating block 22 rotate with the insertion rod 23. The upward collar 21 approaches the rotating block 22, and the collar 21 makes the sliding rod 25 gradually enter the inner side of the sliding frame 26. The moving sliding rod 25 uses the protruding piece 28 to squeeze the second spring 27 on the surface of the sliding frame 26 until the exhaust port is in a smooth state.
[0028] When the push rod 16 moves outward, the elastic force of the second spring 27 causes the slide bar 25 to move out of the slide frame 26, and the distance between the collar 21 and the rotating block 22 gradually increases. At this time, the top collar 21 moves downward and the bottom collar 21 moves upward. At the same time, the elastic force of the first spring 13 arranges the first filter plate 6 and multiple second filter plates 7 in a stepped manner on the inside of the exhaust port, which facilitates the two filter components to cooperate in blocking the exhaust port. After quickly cleaning the attachments on the inner sides of the first filter plate 6 and the second filter plate 7, the first filter plate 6 and the second filter plate 7 can cooperate to continue to provide a continuous filtering effect for the exhaust port, and there is no need to replace the first filter plate 6 and the second filter plate 7 inside the exhaust port too often.
[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.
Claims
1. A high-efficiency, energy-saving and environmentally friendly centrifugal fan, comprising a housing (1), an air inlet (2) being arranged on the front side of the housing (1), a bracket (3) being installed on the rear side of the housing (1), a motor (4) being installed on the top of the bracket (3), a fan blade being arranged inside the housing (1), and the center of the fan blade being transmission-connected to the output end of the motor (4), characterized in that: An exhaust port is provided on one side of the shell (1), and an exhaust frame (5) is fixed at the position of the exhaust port. The external air duct is connected to the exhaust frame (5). Two filter components are installed on the inner side of the exhaust port, and the two filter components are symmetrically arranged up and down with the plane where the center line of the exhaust frame (5) is located as the axial plane. The filter component comprises a first filter plate (6), and a plurality of second filter plates (7) are arranged on the inner side of the first filter plate (6). The plurality of second filter plates (7) are arranged in a stepped manner on the inner side of the exhaust port. Inner plates (8) are provided on both inner side walls of the exhaust port. The end faces of the first filter plate (6) and the second filter plate (7) are fitted with the inner side of the inner plate (8). A baffle plate (9) is fixed on the inner side of the inner plate (8), and the baffle plate (9) cooperates to limit the second filter plate (7). The air discharged from the exhaust port is filtered by the two filter components.
2. The high-efficiency, energy-saving and environmentally friendly centrifugal fan according to claim 1 is characterized in that: The second filter plate (7) is fixed with a side frame (10) on the outer side surface, the top of the side frame (10) on both sides is provided with side strips, the outer side of the bottom surface of the side strips is fixed with a vertical rod (11), the top surface of the first filter plate (6) and the top surface of the second filter plate (7) are provided with grooves (12) corresponding to the side strips, the inner side of the groove (12) is provided with a through groove corresponding to the vertical rod (11), the surface of the vertical rod (11) is sleeved with a first spring (13), one end of the first spring (13) is connected to the side strip, and the other end of the first spring (13) is connected to the inner side of the groove (12).
3. The high-efficiency, energy-saving and environmentally friendly centrifugal fan according to claim 2 is characterized in that: The top filter component utilizes the top surface of the innermost second filter plate (7) to fit with the inner top surface of the exhaust port, and the bottom filter component utilizes the bottom surface of the innermost second filter plate (7) to fit with the inner bottom surface of the exhaust port. Both sides of the innermost second filter plate (7) are fixed with spring plates (14), and the inner end surface of the spring plate (14) fits with the outer side surface of the baffle (9).
4. The high-efficiency, energy-saving and environmentally friendly centrifugal fan according to claim 2 is characterized in that: The first filter plate (6) is fixed with protrusions (15) on both sides of the outer side surface, and two push rods (16) are arranged on the outer side of the first filter plate (6), and the two push rods (16) correspond to the two protrusions (15) one by one. The inner ends of the push rods (16) are provided with slots corresponding to the protrusions (15), and screw rods (17) pass through both sides of the first filter plate (6), and the push rods (16) are connected to the first filter plate (6) by means of the screw rods (17), and a push plate (18) is arranged on the outer side of the first filter plate (6), and the push plate (18) is mounted on the outer ends of the push rods (16) by means of bolts.
5. The high-efficiency, energy-saving and environmentally friendly centrifugal fan according to claim 4 is characterized in that: A side plate (19) is provided inside the circumferential outer side surface of the push rod (16), and an inclined groove (20) corresponding to the side plate (19) is provided on the inner side surface of the inner plate (8). When the push rod (16) moves, the moving push rod (16) drives the side plate (19) to move inside the inclined groove (20).
6. The high-efficiency, energy-saving and environmentally friendly centrifugal fan according to claim 1 is characterized in that: A plurality of collars (21) are arranged on the inner side of the exhaust frame (5), and the plurality of collars (21) correspond to the plurality of push rods (16) one by one. The collars (21) are correspondingly sleeved on the surfaces of the push rods (16). The outer circumferential surface of the collars (21) is connected to the rotating block (22) by means of a telescopic component. The inner side of the rotating block (22) is fixed with an insertion rod (23) penetrating the exhaust frame (5). A nut (24) is spirally sleeved on the inner end of the insertion rod (23). The spiral cooperation between the nut (24) and the insertion rod (23) enables the rotating block (22) to rotate around the insertion rod (23) as the axis, and the outer circumferential surface of the collars (21) is in contact with the inner wall of the exhaust port.
7. The high-efficiency, energy-saving and environmentally friendly centrifugal fan according to claim 6 is characterized in that: The telescopic component comprises a slide rod (25) and a slide frame (26); the inner end of the slide rod (25) is fixedly connected to the collar (21); the outer end of the slide rod (25) is movably plugged into the inner end of the slide frame (26); and the outer end of the slide frame (26) is fixedly connected to the rotating block (22).
8. The high-efficiency, energy-saving and environmentally friendly centrifugal fan according to claim 7 is characterized in that: A second spring (27) is sleeved on the surface of the slide frame (26), the outer end of the second spring (27) is connected to the rotating block (22), a protruding piece (28) is fixed to the outer end of the slide rod (25), a sliding groove corresponding to the protruding piece (28) is provided on the surface of the slide frame (26), and the inner end of the second spring (27) is connected to the protruding piece (28).