Filtering and ventilating mechanism for energy-saving process centrifugal fan

Abstract

The invention belongs to the technical field of centrifugal ventilators, and particularly relates to a filtering ventilation mechanism for an energy-saving process centrifugal ventilator, which comprises an outer cylinder, a coaxial inner cylinder is arranged on the inner side of the outer cylinder, and a filtering device is arranged on the inner side of the inner cylinder. The filtering device comprises a flow guide cone, a first separation inverted cone, a second separation inverted cone, a plurality of fixing rods, a filtering cylinder, an ash discharging pipe and a cyclone air inlet device. When air and dust impurities move to the area where the first separation inverted cone is located, a part of air and dust impurities can sequentially flow into the filter cartridge under the guiding action of the first separation inverted cone and the protrusion on the rear side of the flow guide cone, and then the filter cartridge can filter the air entering the filter cartridge. Therefore, dust is prevented from directly entering the outlet of the inner barrel along with airflow, then filtered air can be discharged out of the filter barrel in the V direction, the dust separating and filtering effect of the cyclone air inlet device is improved, and the using effect of the centrifugal fan is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifugal fans, and in particular relates to a filtering and ventilation mechanism for energy-saving process centrifugal fans. Background Art

[0002] A centrifugal fan is a mechanical device that uses the principle of centrifugal force to transport gas and achieve ventilation and other functions. It is mainly composed of impellers, casings, shafts, bearing transmission mechanisms and other components. The impeller is driven by a motor to rotate at high speed, allowing the gas to obtain energy, thereby achieving gas transportation and pressure increase.

[0003] When the existing centrifugal fan is in use, as the impeller inside the volute works, the outside air can continuously enter the air intake pipe under the action of the impeller. However, due to the presence of impurities such as dust and sand in the air, the impurities will enter the air intake pipe along with the airflow. In order to prevent too many impurities from entering the inside of the centrifugal fan, a cyclone separation mechanism (central guide hub, guide spiral blades and separation inverted cone) is set in the existing air intake pipe, so that the impurities in the air can rotate along the inner wall of the air intake pipe and flow into the designated ash discharge hole and be discharged from the air intake pipe. Although the cyclone separation mechanism can reduce the entry of impurities to a certain extent, since the width of the separation inverted cone is generally narrow, some impurities and dust in the air will still enter the centrifugal fan through the inner side of the separation inverted cone, thereby affecting the use effect of the centrifugal fan.

[0004] Therefore, it is necessary to invent a filtering and ventilation mechanism for an energy-saving process centrifugal fan to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides a filtering and ventilation mechanism for an energy-saving process centrifugal fan to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A filtering and ventilation mechanism for an energy-saving process centrifugal fan, comprising an outer cylinder, a coaxial inner cylinder is arranged inside the outer cylinder, a filtering device is arranged inside the inner cylinder, and the filtering device comprises a guide cone, a first separation inverted cone, a second separation inverted cone, a plurality of fixing rods, a filtering cylinder, an ash discharge pipe and a cyclone air intake device; The gap between the outer cylinder and the inner cylinder forms a dust gathering area, the first separation inverted cone is fixedly connected to the inner wall at the rear end of the inner cylinder, and a plurality of ash discharge holes are annularly distributed on the inner wall of the inner cylinder near the rear end, the guide cone is located at the axis of the inner cylinder, and a plurality of fixing rods are fixedly connected between the guide cone and the inner cylinder, the diameter of the guide cone gradually increases from front to back, the rear axis of the guide cone protrudes backward, and the filter cylinder is sleeved on the rear end protruding part of the guide cone, the second separation inverted cone is fixedly connected to the inner edge of the front end of the filter cylinder, the ash discharge pipe is fixedly inserted at the bottom of the filter cylinder, and the bottom end of the ash discharge pipe is inserted in the gap between the outer cylinder and the inner cylinder.

[0007] Furthermore, the rear end of the outer cylinder is fixedly connected to a flange, the front end of the inner cylinder is fixedly connected to the front end of the outer cylinder, the rear end of the inner cylinder is fixedly connected to the inner edge of the flange, and the bottom of the outer cylinder is connected to a discharge pipe.

[0008] Furthermore, the diameter of the protruding part at the rear end of the guide cone gradually decreases from front to rear, and the protruding part at the rear end of the guide cone includes two fixed sections and a movable section, the movable section is rotatably connected between the two fixed sections, the surfaces of the two fixed sections and the movable section are smoothly connected together, and the filter cartridge is sleeved on the fixed section located on the rear side, the diameter of the first separation inverted cone gradually increases from front to rear, and a plurality of ash discharge holes are opposite to the area where the outer surface of the first separation inverted cone is located, and the diameter of the second separation inverted cone gradually decreases from front to rear.

[0009] Further, the cyclone air intake device includes a central flow guide hub and flow guide spiral blades; The central guide hub is located at the axis of the front end of the inner cylinder, the guide spiral blade is spirally fixedly connected to the surface, and the air inlet at the front end of the guide spiral blade is located in the upper half of the inner cylinder, and the side of the guide spiral blade away from the central guide hub is fixedly connected to the inner wall of the inner cylinder.

[0010] Furthermore, the front side of the filter cartridge is designed as an opening, the rear side of the filter cartridge is designed as a filter screen, and a cleaning assembly is arranged on the inner side of the filter cartridge, and the cleaning assembly includes a cleaning rod, bristles, a rotating shaft and fan blades; There are multiple cleaning rods, and the multiple cleaning rods are vertically fixedly connected to the surface of the movable section. The bristles are evenly distributed on the rear side of the cleaning rods, and the bristles can contact the rear inner wall of the filter cartridge. The rotating shaft is vertically fixed and inserted into the axis of the movable section. The front end of the rotating shaft rotates and inserts into the fixed section located on the front side and the axis of the guide cone in turn, and the rear end of the rotating shaft rotates and inserts into the axis of the fixed section located on the rear side. There are multiple fan blades, and the multiple fan blades are evenly fixedly connected to the surface of the rotating shaft near the front end.

[0011] Furthermore, the length of the cleaning rod matches the inner diameter of the filter cartridge, and a blade matching its length is fixedly connected to the front side of the cleaning rod, and a plurality of baffles are annularly distributed on the rear side of the filter cartridge, and the plurality of baffles are opposite to the plurality of cleaning rods one by one, and the front side of the baffle is close to the rear side of the filter cartridge, and an L-shaped rod is fixedly connected between the rear side of the baffle and the surface of the rear end of the rotating shaft.

[0012] Furthermore, a semi-circular rain shield is provided on the front side of the air inlet of the guide spiral blade, and the rain shield is fixedly connected to the inner wall of the top of the inner tube. The bottom edge of the rain shield is horizontally and evenly fixedly connected with a plurality of blocking teeth, and the rear end of the blocking teeth fits with the surface of the guide spiral blade.

[0013] Furthermore, an isolation ring is provided in the gap between the outer tube and the inner tube, the isolation ring is located at the front side of the discharge pipe, and the inner and outer sides of the isolation ring are fixedly connected to the outer wall of the inner tube and the inner wall of the outer tube respectively.

[0014] Furthermore, the extension line of the outer side surface of the first separation inverted cone is located within the rear side of the guide cone, and the rear side surface of the guide cone is a smooth curve.

[0015] Furthermore, the top end of the ash discharge pipe is flush with the inner wall of the filter cartridge, and the bottom end of the ash discharge pipe is directly opposite to the discharge pipe.

[0016] Technical effects and advantages of the present invention: 1. The present invention is provided with a filter cover. When air and dust impurities move to the area where the first separation inverted cone is located, a part of the air and dust impurities can flow into the filter cartridge along the V direction under the guidance of the first separation inverted cone and the protrusion on the rear side of the guide cone. Then the filter cartridge can filter the air entering the inside thereof, thereby preventing dust from directly entering the outlet of the inner cylinder along with the air flow. Then the filtered air can be discharged from the filter cartridge along the V direction, thereby improving the separation and filtering effect of the cyclone air intake device on dust and ensuring the use effect of the centrifugal fan. 2. The present invention is provided with bristles. During the use of the centrifugal fan, as the airflow enters the inner cylinder, when the airflow blows on the fan blades, the rotating shaft can drive the movable section to rotate under the action of the fan blades, and as the movable section rotates, the movable section can drive the cleaning rod to rotate together, so that the rear inner wall of the filter cylinder is cleaned by the bristles on the cleaning rod to prevent the filter cylinder from being blocked by impurities. Subsequently, the dust removed by the brush can be discharged into the dust gathering area through the dust discharge pipe along the V direction driven by the airflow, and finally the dust impurities entering the dust gathering area can be discharged from the inner cylinder through the discharge pipe along the V direction; 3. The present invention is provided with a baffle. During the process of cleaning the filter cartridge with the bristles, the baffle can always block the rear side of the filter cartridge, so that the dust impurities adsorbed on the filter cartridge will not be affected by the airflow pressure. Therefore, when the bristles on the cleaning rod clean the dust in the baffle-blocking area, the dust impurities can be more easily brushed off from the inner wall of the filter cartridge by the bristles, thereby improving the cleaning effect of the bristles on the filter cartridge. At the same time, as the cleaning rod drives the blade to move, the blade can generate airflow, so that the dust brushed off by the bristles can enter the ash discharge pipe under the action of the airflow generated by the blade, thereby accelerating the discharge efficiency of dust in the filter cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a first overall structural schematic diagram of the present invention; Figure 2 is a second overall structural schematic diagram of the present invention; Figure 3 This is the overall structural section view of the present invention; Figure 4 is a side sectional view of the present invention; Figure 5 It is a three-dimensional schematic diagram of the fan blades, rotating shaft, movable section, cleaning rod and baffle in the present invention; Figure 6 It is a three-dimensional schematic diagram of the movable section, cleaning rod, bristles and blades in the present invention; Figure 7 It is a three-dimensional schematic diagram of the central guide hub, the guide spiral blades, the rain shield and the shield teeth in the present invention.

[0018] In the figure: 1. outer cylinder; 2. inner cylinder; 3. guide cone; 4. first separation inverted cone; 5. second separation inverted cone; 6. fixed rod; 7. filter cylinder; 8. ash discharge pipe; 9. ash discharge hole; 10. flange; 11. discharge pipe; 12. fixed section; 13. movable section; 14. central guide hub; 15. guide spiral blade; 16. cleaning rod; 17. bristles; 18. rotating shaft; 19. fan blade; 20. blade plate; 21. baffle plate; 22. L-shaped rod; 23. rain shield; 24. baffle tooth; 25. isolation ring. DETAILED DESCRIPTION

[0019] 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.

[0020] The present invention provides Figures 1 to 7A filtering and ventilation mechanism for an energy-saving process centrifugal fan is shown, comprising an outer cylinder 1, a coaxial inner cylinder 2 is arranged inside the outer cylinder 1, a filtering device is arranged inside the inner cylinder 2, and the filtering device comprises a guide cone 3, a first separation inverted cone 4, a second separation inverted cone 5, a plurality of fixing rods 6, a filtering cylinder 7, an ash discharge pipe 8 and a cyclone air intake device; The gap between the outer cylinder 1 and the inner cylinder 2 forms a dust gathering area, the first separation inverted cone 4 is fixedly connected to the inner wall at the rear end of the inner cylinder 2, and a plurality of ash discharge holes 9 are distributed in an annular manner on the inner wall of the inner cylinder 2 near the rear end, the guide cone 3 is located at the axis of the inner cylinder 2, and a plurality of fixing rods 6 are fixedly connected between the guide cone 3 and the inner cylinder 2, the diameter of the guide cone 3 gradually increases from front to back, the rear axis of the guide cone 3 protrudes backward, and the filter cylinder 7 is sleeved on the rear end protruding part of the guide cone 3, the second separation inverted cone 5 is fixedly connected to the inner edge of the front end of the filter cylinder 7, the ash discharge pipe 8 is fixedly inserted at the bottom of the filter cylinder 7, and the bottom end of the ash discharge pipe 8 is inserted in the gap between the outer cylinder 1 and the inner cylinder 2, the top end of the ash discharge pipe 8 is flush with the inner wall of the filter cylinder 7, and the bottom end of the ash discharge pipe 8 is directly opposite to the discharge pipe 11.

[0021] The rear end of the outer tube 1 is fixedly connected to a flange 10, the front end of the inner tube 2 is fixedly connected to the front end of the outer tube 1, the rear end of the inner tube 2 is fixedly connected to the inner edge of the flange 10, and the bottom of the outer tube 1 is connected to a discharge pipe 11.

[0022] The diameter of the protruding portion at the rear end of the guide cone 3 gradually decreases from front to back, and the protruding portion at the rear end of the guide cone 3 includes two fixed sections 12 and a movable section 13, and the movable section 13 is rotatably connected between the two fixed sections 12, and the surfaces of the two fixed sections 12 and the movable section 13 are smoothly connected together, and the filter cartridge 7 is sleeved on the fixed section 12 located on the rear side, the diameter of the first separation inverted cone 4 gradually increases from front to back, and a plurality of ash discharge holes 9 are directly opposite to the area where the outer side surface of the first separation inverted cone 4 is located, the diameter of the second separation inverted cone 5 gradually decreases from front to back, the extension line of the outer side surface of the first separation inverted cone 4 is located within the rear side range of the guide cone 3, and the rear side surface of the guide cone 3 is a smooth curve.

[0023] The cyclone air intake device includes a central flow guide hub 14 and flow guide spiral blades 15; The central guide hub 14 is located at the axis of the front end of the inner tube 2, the guide spiral blade 15 is spirally fixedly connected to the surface, and the air inlet at the front end of the guide spiral blade 15 is located in the upper half of the inner tube 2, and the side of the guide spiral blade 15 away from the central guide hub 14 is fixedly connected to the inner wall of the inner tube 2; By providing a cyclone air intake device, when the air enters the inner cylinder 2 through the air inlet of the guide spiral blade 15 under the action of suction, the air can rotate into the inner cylinder 2 under the guiding action of the guide spiral blade 15, and then the air and the dust impurities in the air can rotate along the inner wall of the inner cylinder 2 and move toward the outlet direction of the inner cylinder 2. In this process, part of the dust and air can move along the V1 direction to the position of the first separation inverted cone 4, and then the part of the air and the dust impurities can enter the dust gathering area through the ash discharge hole 9 under the obstruction of the first separation inverted cone 4; In addition, when the air and dust impurities move to the area where the first separation inverted cone 4 is located, a part of the air and dust impurities can flow along the direction V2 to the rear curved surface of the guide cone 3 under the guidance of the first separation inverted cone 4, and then this part of the air and dust can enter the filter cylinder 7 through the inner side of the second separation inverted cone 5 under the guidance of the protrusion on the rear side of the guide cone 3, and then the filter cylinder 7 can filter the air entering the inside thereof, thereby preventing the dust from directly entering the outlet of the inner cylinder 2 with the air flow, and then the filtered air can be discharged from the filter cylinder 7 along the direction V3, thereby enhancing the separation and filtering effect of the cyclone air intake device on the dust, and ensuring the use effect of the centrifugal fan; When the filter cartridge 7 filters the dust impurities in the air, part of the air can enter the ash discharge pipe 8 along the direction of V4. At this time, part of the dust impurities filtered by the filter cartridge 7 can enter the dust gathering area along the ash discharge holes 9, and finally be discharged from the inner cylinder 2 through the discharge pipe 11 along the direction of V5.

[0024] like Figure 3 and Figure 7 As shown, a semi-circular rain shield 23 is provided at the front side of the air inlet of the guide spiral blade 15, and the rain shield 23 is fixedly connected to the inner wall of the top of the inner tube 2, and a plurality of retaining teeth 24 are fixedly connected to the bottom edge of the rain shield 23 in a horizontal and uniform manner, and the rear end of the retaining teeth 24 is in contact with the surface of the guide spiral blade 15; By providing the rain shield 23, when air enters the inner tube 2 through the air inlet of the guide spiral blade 15, the rain shield 23 can shield rainwater from the external environment, thereby preventing rainwater from entering the inner tube 2 under the action of suction and causing the inner wall of the inner tube 2 to become wet, thereby causing dust and impurities to adhere to the inner wall of the inner tube 2 after entering the inner tube 2, thereby affecting the dust and impurities from smoothly entering the dust gathering area; By providing the blocking teeth 24 , when air enters the air inlet of the guide spiral blade 15 , the blocking teeth 24 can block larger debris, thereby preventing the debris from entering the inner tube 2 .

[0025] like Figures 3 to 6As shown, the front side of the filter cartridge 7 is designed as an opening, the rear side of the filter cartridge 7 is designed as a filter screen, and a cleaning assembly is arranged on the inner side of the filter cartridge 7, and the cleaning assembly includes a cleaning rod 16, bristles 17, a rotating shaft 18 and a fan blade 19; There are multiple cleaning rods 16, and multiple cleaning rods 16 are vertically fixedly connected to the surface of the movable section 13. The bristles 17 are evenly distributed on the rear side of the cleaning rods 16, and the bristles 17 can contact the rear inner wall of the filter cartridge 7. The rotating shaft 18 is vertically fixed and inserted at the axis of the movable section 13. The front end of the rotating shaft 18 is rotated and inserted at the axis of the fixed section 12 and the guide cone 3 at the front side in turn. The rear end of the rotating shaft 18 is rotated and inserted at the axis of the fixed section 12 at the rear side. There are multiple fan blades 19, and multiple fan blades 19 are evenly fixedly connected to the surface of the rotating shaft 18 near the front end. By providing the bristles 17, during the use of the centrifugal fan, as the airflow enters the inner tube 2, when the airflow blows on the fan blades 19, the rotating shaft 18 can drive the movable section 13 to rotate under the action of the fan blades 19, and as the movable section 13 rotates, the movable section 13 can drive the cleaning rod 16 to rotate together, so that the rear inner wall of the filter tube 7 is cleaned by the bristles 17 on the cleaning rod 16 to prevent the filter tube 7 from being blocked by impurities, and then the dust brushed off can be driven by the airflow along the V4 direction through the ash discharge pipe 8 to be discharged into the dust gathering area, and finally the dust impurities entering the dust gathering area can be discharged from the inner tube 2 along the V5 direction through the discharge pipe 11.

[0026] like Figure 4 and Figure 6 As shown, the length of the cleaning rod 16 matches the inner diameter of the filter cartridge 7, and a blade 20 matching its length is fixedly connected to the front side of the cleaning rod 16, and a plurality of baffles 21 are distributed annularly on the rear side of the filter cartridge 7, and the plurality of baffles 21 are directly opposite to the plurality of cleaning rods 16 one by one, and the front side of the baffle 21 is close to the rear side of the filter cartridge 7, and an L-shaped rod 22 is fixedly connected between the rear side of the baffle 21 and the surface of the rear end of the rotating shaft 18; By providing the baffle 21, during the process of the bristles 17 on the cleaning rod 16 cleaning the filter cartridge 7, the baffle 21 can move with the cleaning rod 16. During this process, since the baffle 21 is always blocking the rear side of the filter cartridge 7, the airflow will not pass through the area where the baffle 21 is located due to the blocking effect of the baffle 21. Therefore, the dust impurities adsorbed on the filter cartridge 7 will not be affected by the airflow pressure. Therefore, when the bristles 17 on the cleaning rod 16 clean the dust in the area blocked by the baffle 21, the dust impurities can be more easily brushed off from the inner wall of the filter cartridge 7 by the bristles 17, thereby improving the cleaning effect of the bristles 17 on the filter cartridge 7. At the same time, as the cleaning rod 16 drives the blade 20 to move, the blade 20 can generate an airflow, so that the dust brushed off by the bristles 17 can enter the ash discharge pipe 8 under the action of the airflow generated by the blade 20, thereby accelerating the dust discharge efficiency in the filter cartridge 7.

[0027] like Figure 3 and Figure 4 As shown, an isolation ring 25 is provided in the gap between the outer tube 1 and the inner tube 2. The isolation ring 25 is located at the front side of the discharge pipe 11, and the inner and outer sides of the isolation ring 25 are fixedly connected to the outer wall of the inner tube 2 and the inner wall of the outer tube 1 respectively; By providing the isolation ring 25, the dust collection area between the inner tube 2 and the outer tube 1 can be reduced to avoid excessive diffusion of impurities entering the dust collection area. At the same time, the impurities entering the dust collection area can be discharged through the discharge pipe 11 as soon as possible.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A filtering and ventilation mechanism for an energy-saving process centrifugal fan, comprising an outer cylinder (1), characterized in that: A coaxial inner cylinder (2) is arranged inside the outer cylinder (1), and a filtering device is arranged inside the inner cylinder (2), wherein the filtering device comprises a guide cone (3), a first separation inverted cone (4), a second separation inverted cone (5), a plurality of fixing rods (6), a filtering cylinder (7), an ash discharge pipe (8), and a cyclone air intake device; The gap between the outer cylinder (1) and the inner cylinder (2) forms a dust gathering area, the first separation inverted cone (4) is fixedly connected to the inner wall at the rear end of the inner cylinder (2), a plurality of ash discharge holes (9) are annularly distributed on the inner wall of the inner cylinder (2) near the rear end, the guide cone (3) is located at the axis of the inner cylinder (2), a plurality of fixing rods (6) are fixedly connected between the guide cone (3) and the inner cylinder (2), the diameter of the guide cone (3) gradually increases from front to back, the rear axis of the guide cone (3) protrudes backwards, and the filter cylinder (7) is sleeved on the rear end protruding part of the guide cone (3), the second separation inverted cone (5) is fixedly connected to the inner edge of the front end of the filter cylinder (7), the ash discharge pipe (8) is fixedly inserted at the bottom of the filter cylinder (7), and the bottom end of the ash discharge pipe (8) is inserted into the gap between the outer cylinder (1) and the inner cylinder (2).

2. The filtering and ventilation mechanism for energy-saving process centrifugal fan according to claim 1, characterized in that: The rear end of the outer cylinder (1) is fixedly connected to a flange (10), the front end of the inner cylinder (2) is fixedly connected to the front end of the outer cylinder (1), the rear end of the inner cylinder (2) is fixedly connected to the inner edge of the flange (10), and the bottom of the outer cylinder (1) is connected to a discharge pipe (11).

3. The filtering and ventilation mechanism for energy-saving process centrifugal fan according to claim 1, characterized in that: The diameter of the protruding portion at the rear end of the guide cone (3) gradually decreases from front to back, and the protruding portion at the rear end of the guide cone (3) comprises two fixed sections (12) and a movable section (13), the movable section (13) is rotatably connected between the two fixed sections (12), the surfaces of the two fixed sections (12) and the movable section (13) are smoothly connected together, and the filter cartridge (7) is sleeved on the fixed section (12) located at the rear side, the diameter of the first separation inverted cone (4) gradually increases from front to back, and the plurality of ash discharge holes (9) are directly opposite to the area where the outer side surface of the first separation inverted cone (4) is located, and the diameter of the second separation inverted cone (5) gradually decreases from front to back.

4. The filtering and ventilation mechanism for energy-saving process centrifugal fan according to claim 2, characterized in that: The cyclone air intake device comprises a central flow guide hub (14) and flow guide spiral blades (15); The central flow guide hub (14) is located at the axis of the front end of the inner cylinder (2), the flow guide spiral blade (15) is spirally fixedly connected to the surface, and the air inlet at the front end of the flow guide spiral blade (15) is located in the upper half of the inner cylinder (2), and the side of the flow guide spiral blade (15) away from the central flow guide hub (14) is fixedly connected to the inner wall of the inner cylinder (2).

5. The filtering and ventilation mechanism for energy-saving process centrifugal fan according to claim 3, characterized in that: The front side of the filter cartridge (7) is designed to be open, the rear side of the filter cartridge (7) is designed to be a filter screen, and a cleaning component is provided on the inner side of the filter cartridge (7), the cleaning component comprising a cleaning rod (16), bristles (17), a rotating shaft (18), and fan blades (19); The number of the cleaning rods (16) is plural, and the plurality of cleaning rods (16) are vertically fixedly connected to the surface of the movable section (13); the bristles (17) are evenly distributed on the rear side of the cleaning rods (16), and the bristles (17) can contact the rear inner wall of the filter cartridge (7); the rotating shaft (18) is vertically fixedly inserted through the axis of the movable section (13); the front end of the rotating shaft (18) is rotated and inserted through the axis of the fixed section (12) located at the front side and the guide cone (3) in turn; the rear end of the rotating shaft (18) is rotated and inserted through the axis of the fixed section (12) located at the rear side; the number of the fan blades (19) is plural, and the plurality of fan blades (19) are evenly fixedly connected to the surface of the rotating shaft (18) near the front end.

6. The filtering and ventilation mechanism for energy-saving process centrifugal fan according to claim 5, characterized in that: The length of the cleaning rod (16) matches the inner diameter of the filter cartridge (7), and a blade (20) matching the length of the cleaning rod (16) is fixedly connected to the front side of the cleaning rod (16), and a plurality of baffles (21) are distributed in an annular pattern on the rear side of the filter cartridge (7), and the plurality of baffles (21) are directly opposite to the plurality of cleaning rods (16) one by one, and the front side of the baffles (21) is close to the rear side of the filter cartridge (7), and an L-shaped rod (22) is fixedly connected between the rear side of the baffle (21) and the surface of the rear end of the rotating shaft (18).

7. The filtering and ventilation mechanism for energy-saving process centrifugal fan according to claim 4, characterized in that: A semi-circular rain shield (23) is provided at the front side of the air inlet of the guide spiral blade (15), the rain shield (23) is fixedly connected to the inner wall of the top of the inner cylinder (2), a plurality of retaining teeth (24) are evenly and horizontally fixedly connected to the bottom edge of the rain shield (23), and the rear end of the retaining teeth (24) is in contact with the surface of the guide spiral blade (15).

8. The filtering and ventilation mechanism for energy-saving process centrifugal fan according to claim 7, characterized in that: An isolation ring (25) is provided in the gap between the outer cylinder (1) and the inner cylinder (2); the isolation ring (25) is located at the front side of the discharge pipe (11), and the inner and outer sides of the isolation ring (25) are respectively fixedly connected to the outer wall of the inner cylinder (2) and the inner wall of the outer cylinder (1).

9. The filtering and ventilation mechanism for energy-saving process centrifugal fan according to claim 5, characterized in that: The extension line of the outer side surface of the first separation inverted cone (4) is located within the rear side range of the guide cone (3), and the rear side surface of the guide cone (3) is a smooth curve.

10. The filtering and ventilation mechanism for energy-saving process centrifugal fan according to claim 8, characterized in that: The top end of the ash discharge pipe (8) is flush with the inner wall of the filter cartridge (7), and the bottom end of the ash discharge pipe (8) is directly opposite to the discharge pipe (11).

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