A filtering and ventilation mechanism for a centrifugal ventilator in an energy-saving process

Abstract

The present invention belongs to the technical field of centrifugal fans, and particularly relates to a filtering and ventilation mechanism for an energy-saving process centrifugal fan, including an outer cylinder. An inner cylinder coaxial with the outer cylinder is arranged inside the outer cylinder. A filtering device is arranged inside the inner cylinder. The filtering device includes a flow guiding cone, a first separation inverted cone, a second separation inverted cone, a plurality of fixing rods, a filtering cylinder, a dust 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, part of the air and dust impurities can flow into the filtering cylinder successively under the guiding action of the first separation inverted cone and the protrusion at the rear side of the flow guiding cone. Subsequently, the filtering cylinder can filter the air entering its interior, 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 filtering cylinder along the direction of V, thereby enhancing the separation and filtering effect of the cyclone air inlet device on dust and ensuring the use effect of the centrifugal fan.

Description

Technical Field

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

[0002] A centrifugal fan is a mechanical device that works based on the principle of centrifugal force and is used for functions such as transporting gas and achieving ventilation and air change. It mainly consists of components such as an impeller, a casing, a shaft, and a bearing drive mechanism. The impeller is driven by a motor to rotate at high speed, enabling the gas to obtain energy, thereby achieving the transportation and pressure increase of the gas.

[0003] When the existing centrifugal fan is in use, as the impeller inside the volute works, external air can continuously enter the intake pipe under the action of the impeller. However, since there are impurities such as dust and sand in the air, the impurities will enter the intake pipe along with the airflow. To avoid excessive impurities from entering the centrifugal fan, a cyclone separation mechanism (a central guide hub, a guide spiral blade, and a separation inverted cone) is provided inside the existing intake pipe, so that the impurities in the air can rotate along the inner wall of the intake pipe and flow into the designated ash discharge hole and be discharged from the 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 of the impurity dust in the air will still enter the centrifugal fan through the inside 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 a centrifugal fan used in an energy-saving process 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 a centrifugal fan used in an energy-saving process to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A filtering and ventilation mechanism for a centrifugal fan used in an energy-saving process, including an outer cylinder, an inner cylinder coaxial with the outer cylinder is arranged inside the outer cylinder, a filtering device is arranged inside the inner cylinder, and the filtering device includes a guide cone, a first separation inverted cone, a second separation inverted cone, a plurality of fixing rods, a filter cylinder, an ash discharge pipe, and a cyclone air intake device;

[0007] The gap between the outer cylinder and the inner cylinder forms a dust accumulation area. The first separation inverted cone is fixedly connected to the inner wall at the rear end of the inner cylinder. A plurality of ash discharge holes are annularly distributed on the inner wall of the inner cylinder near the rear end. The diversion cone is located at the axis of the inner cylinder. A plurality of the fixing rods are fixedly connected between the diversion cone and the inner cylinder. The diameter of the diversion cone gradually increases from front to back. The rear axis of the diversion cone protrudes backward, and the filter cartridge is sleeved on the protruding part at the rear end of the diversion cone. The second separation inverted cone is fixedly connected to the inner edge of the front end of the filter cartridge. The ash discharge pipe is fixedly inserted at the bottom of the filter cartridge, and the bottom end of the ash discharge pipe is inserted into the gap between the outer cylinder and the inner cylinder.

[0008] Furthermore, a flange is fixedly connected to the rear end of the outer cylinder. 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. A discharge pipe is connected to the bottom of the outer cylinder.

[0009] Furthermore, the diameter of the protruding part at the rear end of the diversion cone gradually decreases from front to back. The protruding part at the rear end of the diversion 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. The filter cartridge is sleeved on the rear fixed section. The diameter of the first separation inverted cone gradually increases from front to back, and a plurality of ash discharge holes are opposite to the area on the outer side of the first separation inverted cone. The diameter of the second separation inverted cone gradually decreases from front to back.

[0010] Furthermore, the cyclone air inlet device includes a central diversion hub and diversion spiral blades;

[0011] The central diversion hub is located at the axis of the front end of the inner cylinder. The diversion spiral blades are spirally and fixedly connected to the surface. The air inlet at the front end of the diversion spiral blades is located in the upper half of the inner cylinder. The side of the diversion spiral blades away from the central diversion hub is fixedly connected to the inner wall of the inner cylinder.

[0012] Furthermore, the front side of the filter cartridge is designed to be open. The rear side of the filter cartridge is designed with a filter screen. A cleaning component is arranged inside the filter cartridge. The cleaning component includes a cleaning rod, bristles, a rotating shaft, and fan blades;

[0013] The number of the cleaning rods is multiple. The multiple cleaning rods are vertically and 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 inner wall of the rear side of the filter cartridge. The rotating shaft is vertically and fixedly inserted through the axis of the movable section. The front end of the rotating shaft is sequentially rotatably inserted through the axis of the front fixed section and the diversion cone. The rear end of the rotating shaft is rotatably inserted through the axis of the rear fixed section. The number of the fan blades is multiple. The multiple fan blades are evenly and fixedly connected to the surface of the rotating shaft near the front end.

[0014] Further, the length of the cleaning rod matches the inner diameter of the filter cylinder, and a vane matching its length is fixedly connected to the front side of the cleaning rod. A plurality of baffles are annularly distributed on the rear side of the filter cylinder, and the plurality of baffles are respectively directly opposite to the plurality of cleaning rods. The front side of the baffle is close to the rear side of the filter cylinder, 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.

[0015] Further, a semi-circular rain shield is arranged on the front side of the air inlet of the guide spiral vane. The rain shield is fixedly connected to the inner wall of the top of the inner cylinder. A plurality of retaining teeth are horizontally and evenly fixedly connected to the bottom edge of the rain shield, and the rear ends of the retaining teeth are attached to the surface of the guide spiral vane.

[0016] Further, a separation ring is arranged in the gap between the outer cylinder and the inner cylinder. The separation ring is located in front of the discharge pipe, and the inner and outer sides of the separation ring are respectively fixedly connected to the outer wall of the inner cylinder and the inner wall of the outer cylinder.

[0017] Further, the extension line of the outer side surface of the first separation inverted cone is within the range of the rear side of the diversion cone, and the rear side surface of the diversion cone is a smooth curve.

[0018] Further, the top end of the ash discharge pipe is flush with the inner wall of the filter cylinder, and the bottom end of the ash discharge pipe is directly opposite to the discharge pipe.

[0019] The technical effects and advantages of the present invention are as follows:

[0020] 1. By providing a filter cover in the present invention, 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 cylinder along the V direction under the guiding action of the first separation inverted cone and the protrusion on the rear side of the diversion cone in sequence. Subsequently, the filter cylinder can filter the air entering its interior, 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 cylinder along the V direction, thereby enhancing the separation and filtration effect of the cyclone air inlet device on dust and ensuring the use effect of the centrifugal ventilator.

[0021] 2. By providing bristles in the present invention, during the use of the centrifugal ventilator, as the air flow enters the inner cylinder, when the air flow blows on the fan blades, the rotating shaft can drive the movable section to rotate under the action of the fan blades. As the movable section rotates, the movable section can drive the cleaning rod to rotate together, thereby cleaning the inner wall of the rear side of the filter cylinder with the bristles on the cleaning rod to prevent the filter cylinder from being blocked by impurities. Then, the dust brushed off can be discharged into the dust accumulation area along the V direction under the drive of the air flow, and finally, the dust impurities entering the dust accumulation area can be discharged from the inner cylinder along the V direction through the discharge pipe.

[0022] 3. In the present invention, by providing a baffle plate, during the process of the brush bristles cleaning the filter cylinder, the baffle plate can always block the rear side of the filter cylinder, so that the dust and impurities adsorbed on the filter cylinder will not be affected by the air flow pressure. Therefore, when the brush bristles on the cleaning rod clean the dust in the area blocked by the baffle plate, the dust and impurities can be more easily brushed off from the inner wall of the filter cylinder by the brush bristles, improving the cleaning effect of the brush bristles on the filter cylinder. At the same time, as the cleaning rod drives the leaf plate to move, the leaf plate can generate an air flow, so that the dust brushed off by the brush bristles can enter the ash discharge pipe under the action of the air flow generated by the leaf plate, thereby accelerating the ash discharge efficiency of the dust in the filter cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the first overall structural schematic diagram of the present invention;

[0024] Figure 2 is the second overall structural schematic diagram of the present invention;

[0025] Figure 3 is the overall structural sectional view of the present invention;

[0026] Figure 4 is the side sectional view of the present invention;

[0027] Figure 5 is the three-dimensional schematic diagram of the structures such as the fan blade, rotating shaft, movable section, cleaning rod and baffle plate in the present invention;

[0028] Figure 6 is the three-dimensional schematic diagram of the movable section, cleaning rod, brush bristles and leaf plate in the present invention;

[0029] Figure 7 is the three-dimensional schematic diagram of the central guide hub, guide spiral blade, rain shield and retaining teeth in the present invention.

[0030] In the figure: 1. Outer cylinder; 2. Inner cylinder; 3. Flow 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. Brush bristles; 18. Rotating shaft; 19. Fan blade; 20. Leaf plate; 21. Baffle plate; 22. L-shaped rod; 23. Rain shield; 24. Retaining teeth; 25. Isolation ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0032] The present invention provides as Figures 1 to 7A filtering and ventilation mechanism for a centrifugal ventilator used in an energy-saving process, including an outer cylinder 1. An inner cylinder 2 coaxial with it is arranged inside the outer cylinder 1. A filtering device is arranged inside the inner cylinder 2. The filtering device includes a diversion cone 3, a first separation inverted cone 4, a second separation inverted cone 5, a plurality of fixing rods 6, a filtering cylinder 7, a dust discharge pipe 8 and a cyclone air inlet device;

[0033] The gap between the outer cylinder 1 and the inner cylinder 2 forms a dust accumulation 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 dust discharge holes 9 are annularly distributed on the inner wall of the inner cylinder 2 near the rear end. The diversion cone 3 is located at the axis of the inner cylinder 2. A plurality of the fixing rods 6 are fixedly connected between the diversion cone 3 and the inner cylinder 2. The diameter of the diversion cone 3 gradually increases from front to back. The rear axis of the diversion cone 3 protrudes backward, and the filtering cylinder 7 is sleeved on the protruding part at the rear end of the diversion cone 3. The second separation inverted cone 5 is fixedly connected to the inner edge of the front end of the filtering cylinder 7. The dust discharge pipe 8 is fixedly inserted at the bottom of the filtering cylinder 7, and the bottom end of the dust discharge pipe 8 is inserted into the gap between the outer cylinder 1 and the inner cylinder 2. The top end of the dust discharge pipe 8 is flush with the inner wall of the filtering cylinder 7. The bottom end of the dust discharge pipe 8 is directly opposite to the discharge pipe 11.

[0034] A flange 10 is fixedly connected to the rear end of the outer cylinder 1. 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. A discharge pipe 11 is connected to the bottom of the outer cylinder 1.

[0035] The diameter of the protruding part at the rear end of the diversion cone 3 gradually decreases from front to back. The protruding part at the rear end of the diversion cone 3 includes 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 filtering cylinder 7 is sleeved on the rear fixed section 12. The diameter of the first separation inverted cone 4 gradually increases from front to back, and a plurality of dust 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 within the range of the rear side of the diversion cone 3, and the rear side surface of the diversion cone 3 is a smooth curve.

[0036] The cyclone air inlet device includes a central diversion hub 14 and diversion spiral blades 15;

[0037] The central diversion hub 14 is located at the axis of the front end of the inner cylinder 2. The diversion spiral blades 15 are spirally and fixedly connected to the surface. The air inlet at the front end of the diversion spiral blades 15 is located in the upper half of the inner cylinder 2. The side of the diversion spiral blades 15 away from the central diversion hub 14 is fixedly connected to the inner wall of the inner cylinder 2;

[0038] By setting up a cyclone air intake device, when 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. Subsequently, the air and dust impurities in the air can move along the inner wall of the inner cylinder 2 in a rotating manner towards the outlet direction of the inner cylinder 2. During this process, part of the dust and air can move along the V1 direction to the position where the first separation inverted cone 4 is located. Then, this part of the air and dust impurities can enter the dust accumulation area through the dust discharge hole 9 under the blockage of the first separation inverted cone 4;

[0039] In addition, when the air and dust impurities move to the area where the first separation inverted cone 4 is located, another part of the air and dust impurities can flow along the V2 direction to the rear curved surface of the guide cone 3 under the guiding action of the first separation inverted cone 4. Subsequently, this part of the air and dust can enter the filter cylinder 7 through the inside of the second separation inverted cone 5 under the guiding action of the protrusions on the rear side of the guide cone 3. Then, the filter cylinder 7 can filter the air entering its interior, thereby preventing dust from directly entering the outlet of the inner cylinder 2 along with the air flow. Subsequently, the filtered air can be discharged from the filter cylinder 7 along the V3 direction, thereby enhancing the separation and filtration effect of the cyclone air intake device on dust and ensuring the use effect of the centrifugal ventilator;

[0040] When the filter cylinder 7 filters the dust impurities in the air, part of the air can enter the dust discharge pipe 8 along the V4 direction. At this time, part of the dust impurities filtered by the filter cylinder 7 can enter the dust accumulation area along the dust discharge hole 9 and finally be discharged from the inner cylinder 2 along the V5 direction through the discharge pipe 11.

[0041] As Figure 3 and Figure 7 shown, a semi-circular rain shield 23 is arranged on 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. The bottom edge of the rain shield 23 is horizontally and evenly fixedly connected with a number of baffle teeth 24, and the rear end of the baffle teeth 24 is attached to the surface of the guide spiral blade 15;

[0042] By setting up the rain shield 23, when air enters the inner cylinder 2 through the air inlet of the guide spiral blade 15, the rain shield 23 can block the rain in the external environment, thereby preventing the rain from entering the inner cylinder 2 under the action of suction and causing the inner wall of the inner cylinder 2 to be damp. Furthermore, when the dust impurities enter the inner cylinder 2, the dust impurities will be adhered to the inner wall of the inner cylinder 2, affecting the smooth entry of the dust impurities into the dust accumulation area;

[0043] By setting up the baffle teeth 24, when air enters the air inlet of the guide spiral blade 15, the baffle teeth 24 can block larger sundries and prevent the sundries from entering the inner cylinder 2.

[0044] As shown Figures 3 to 6 As shown, the front side of the filter cartridge 7 is designed to be open, the rear side of the filter cartridge 7 is designed with a filter screen, and a cleaning component is arranged inside the filter cartridge 7. The cleaning component includes a cleaning rod 16, a brush 17, a rotating shaft 18 and a fan blade 19;

[0045] The number of the cleaning rods 16 is multiple, and the multiple cleaning rods 16 are vertically and fixedly connected to the surface of the movable section 13. The brushes 17 are evenly distributed on the rear side of the cleaning rods 16, and the brushes 17 can contact the inner wall of the rear side of the filter cartridge 7. The rotating shaft 18 is vertically and fixedly inserted through the axis of the movable section 13. The front end of the rotating shaft 18 is sequentially rotatably inserted through the axes of the front fixed section 12 and the flow guide cone 3, and the rear end of the rotating shaft 18 is rotatably inserted through the axis of the rear fixed section 12. The number of the fan blades 19 is multiple, and the multiple fan blades 19 are evenly and fixedly connected to the surface of the rotating shaft 18 near the front end;

[0046] By arranging the brushes 17, during the use of the centrifugal ventilator, as the air flow enters the inner cylinder 2, when the air flow 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. As the movable section 13 rotates, the movable section 13 can drive the cleaning rods 16 to rotate together, so as to clean the inner wall of the rear side of the filter cartridge 7 through the brushes 17 on the cleaning rods 16, avoiding the filter cartridge 7 from being blocked by impurities. Subsequently, the dust brushed off can be driven by the air flow to be discharged into the dust accumulation area along the V4 direction through the dust discharge pipe 8, and finally the dust and impurities entering the dust accumulation area can be discharged from the inner cylinder 2 along the V5 direction through the discharge pipe 11.

[0047] As shown 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 vane 20 matching its length is fixedly connected to the front side of the cleaning rod 16. A plurality of baffles 21 are annularly distributed on the rear side of the filter cartridge 7. The plurality of baffles 21 are in one-to-one correspondence with the plurality of cleaning rods 16, and the front side of the baffle 21 is close to the rear side of the filter cartridge 7. 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;

[0048] By providing a baffle 21, during the process of cleaning the filter cartridge 7 with the bristles 17 on the cleaning rod 16, the baffle 21 can move together with the cleaning rod 16. During this process, since the baffle 21 always blocks the rear side of the filter cartridge 7, the air flow will not pass through the area where the baffle 21 is located under the blocking effect of the baffle 21. Therefore, the dust and impurities adsorbed on the filter cartridge 7 will not be affected by the air flow pressure. Thus, when the bristles 17 on the cleaning rod 16 clean the dust in the area blocked by the baffle 21, the dust and impurities can be more easily brushed off the inner wall of the filter cartridge 7 by the bristles 17, improving the cleaning effect of the bristles 17 on the filter cartridge 7. At the same time, as the cleaning rod 16 drives the vane 20 to move, the vane 20 can generate an air flow, so that the dust brushed off by the bristles 17 can enter the ash discharge pipe 8 under the action of the air flow generated by the vane 20, thereby accelerating the discharge efficiency of the dust in the filter cartridge 7.

[0049] As Figure 3 and Figure 4 shown, a separation ring 25 is provided in the gap between the outer cylinder 1 and the inner cylinder 2. The separation ring 25 is located in front of the discharge pipe 11, and the inner and outer sides of the separation ring 25 are fixedly connected to the outer wall of the inner cylinder 2 and the inner wall of the outer cylinder 1 respectively;

[0050] By providing the separation ring 25, the dust accumulation area between the inner cylinder 2 and the outer cylinder 1 can be reduced, preventing the impurities entering the dust accumulation area from spreading excessively. At the same time, it can also enable the impurities entering the dust accumulation area to be discharged through the discharge pipe 11 as soon as possible.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, not to limit it.

Claims

1. A filtering and ventilation mechanism for a centrifugal ventilator in an energy-saving process, comprising an outer cylinder (1), characterized in that: Inside the outer cylinder (1), a coaxial inner cylinder (2) is provided. Inside the inner cylinder (2), a filtering device is provided. The filtering device includes a flow guiding 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 inlet device; The gap between the outer cylinder (1) and the inner cylinder (2) forms a dust accumulation 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 flow guiding cone (3) is located at the axis of the inner cylinder (2). A plurality of the fixing rods (6) are fixedly connected between the flow guiding cone (3) and the inner cylinder (2). The diameter of the flow guiding cone (3) gradually increases from front to back. The rear axial center of the flow guiding cone (3) protrudes backward, and the filtering cylinder (7) is sleeved on the protruding part at the rear end of the flow guiding cone (3). The second separation inverted cone (5) is fixedly connected to the inner edge of the front end of the filtering cylinder (7). The ash discharge pipe (8) is fixedly inserted at the bottom of the filtering 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); The diameter of the protruding part at the rear end of the flow guiding cone (3) gradually decreases from front to back. The protruding part at the rear end of the flow guiding cone (3) includes 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 filtering cylinder (7) is sleeved on the fixed section (12) at 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 opposite to the area where the outer side of the first separation inverted cone (4) is located. The diameter of the second separation inverted cone (5) gradually decreases from front to back.

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

3. The filtering and ventilation mechanism for the centrifugal ventilator used in the energy-saving process according to claim 2, wherein: The cyclone air inlet device includes a central flow guiding hub (14) and flow guiding spiral vanes (15); The central flow guiding hub (14) is located at the axis of the front end of the inner cylinder (2). The flow guiding spiral vanes (15) are spirally and fixedly connected to the surface of the central flow guiding hub (14). The air inlet at the front end of the flow guiding spiral vanes (15) is located in the upper half of the inner cylinder (2). The side of the flow guiding spiral vanes (15) away from the central flow guiding hub (14) is fixedly connected to the inner wall of the inner cylinder (2).

4. The filtering and ventilation mechanism for the centrifugal ventilator used in the energy-saving process according to claim 3, characterized in that: The front side of the filtering cylinder (7) is designed with an opening. The rear side of the filtering cylinder (7) is designed with a filter screen. A cleaning component is arranged inside the filtering cylinder (7). The cleaning component includes a cleaning rod (16), bristles (17), a rotating shaft (18), and a fan blade (19); The number of the cleaning rods (16) is multiple, and the multiple cleaning rods (16) are vertically and 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 inner wall of the rear side of the filter cylinder (7). The rotating shaft (18) is vertically and fixedly inserted through the axis of the movable section (13). The front end of the rotating shaft (18) is sequentially inserted through the axis of the front fixed section (12) and the diversion cone (3) in a rotating manner. The rear end of the rotating shaft (18) is inserted through the axis of the rear fixed section (12) in a rotating manner. The number of the fan blades (19) is multiple, and the multiple fan blades (19) are evenly and fixedly connected to the surface of the rotating shaft (18) near the front end.

5. The filtering and ventilation mechanism for a centrifugal ventilator used in an energy-saving process according to claim 4, characterized in that: The length of the cleaning rod (16) matches the inner diameter of the filter cylinder (7), and a vane (20) matching its length is fixedly connected to the front side of the cleaning rod (16). A plurality of baffles (21) are annularly distributed on the rear side of the filter cylinder (7). The plurality of baffles (21) are in one-to-one correspondence with the plurality of cleaning rods (16), and the front side of the baffle (21) is close to the rear side of the filter cylinder (7). 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).

6. The filtering and ventilation mechanism for a centrifugal ventilator used in an energy-saving process according to claim 5, characterized in that: A semi-circular rain shield (23) is arranged on the front side of the air inlet at the front end of the diversion 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 horizontally and evenly fixedly connected to the bottom edge of the rain shield (23), and the rear ends of the retaining teeth (24) are attached to the surface of the diversion spiral blade (15).

7. The filtering and ventilation mechanism for a centrifugal ventilator used in an energy-saving process according to claim 6, characterized in that: An isolation ring (25) is arranged in the gap between the outer cylinder (1) and the inner cylinder (2). The isolation ring (25) is located on 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).

8. The filtering and ventilation mechanism for a centrifugal ventilator used in an energy-saving process according to claim 7, characterized in that: The extension line of the outer side of the first separation inverted cone (4) is within the range of the rear side of the diversion cone (3), and the rear side of the diversion cone (3) is a smooth curve.

9. The filtering and ventilation mechanism for the centrifugal ventilator used in the energy-saving process 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 cylinder (7), and the bottom end of the ash discharge pipe (8) is directly opposite to the discharge pipe (11).

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