Air purification equipment based on static electricity

Abstract

The invention relates to the field of air purification, in particular to static electricity based air purification equipment which comprises a purification cavity, the bottom of the purification cavity is slidably connected with a filter plate cavity, and two high-voltage ionization plates capable of being overturned are arranged on the left side and the right side of the purification cavity correspondingly. A plurality of movable electrostatic dust collection plates are arranged on the upper side of the purification cavity; the purification cavity is fixedly connected to a swing support, the swing support is fixedly connected to an output shaft of a swing motor, the swing motor is fixedly connected to the telescopic end of a telescopic mechanism I, and the telescopic mechanism I is fixedly connected to a moving mechanism; a telescopic mechanism II is fixedly connected to the side edge of the air inlet cavity, a filter plate cavity is fixedly connected to the telescopic end of the telescopic mechanism II, and a plurality of filter holes are formed in the bottom of the filter plate cavity; by moving the electrostatic dust collection plate in the purification process, the adsorption efficiency of the particulate matters is optimized, and cleaning and maintenance are facilitated.

Description

Technical Field

[0001] The present invention relates to the field of air purification, and more specifically to an electrostatic-based air purification device. Background Art

[0002] In traditional electrostatic air purification devices, the electrostatic dust collection plate is usually of a fixed design. For example, in the patent with the publication number CN207050104U, an integrated double-layer electrostatic air purification device is disclosed, which can make the electrostatic air purification device have high purification efficiency, low ozone generation, no arcing and sparking problems, small air flow resistance, and at the same time, no shutdown operation is required during the equipment maintenance process, and the maintenance cost is low. In traditional electrostatic air purification devices, the electrostatic dust collection plate is usually of a fixed design, and such a design cannot move the electrostatic dust collection plate during the purification process, and the adsorption efficiency of particulate matter cannot be optimized. Summary of the Invention

[0003] The purpose of the present invention is to provide an electrostatic-based air purification device, which optimizes the adsorption efficiency of particulate matter by moving the electrostatic dust collection plate during the purification process.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] An electrostatic-based air purification device includes a purification cavity. A filter plate cavity is slidably connected to the bottom of the purification cavity. Two flipable high-voltage ionization plates are respectively arranged on the left and right sides of the purification cavity. A plurality of movable electrostatic dust collection plates are arranged on the upper side of the purification cavity;

[0006] The purification cavity is fixedly connected to a swing bracket, the swing bracket is fixedly connected to the output shaft of a swing motor, the swing motor is fixedly connected to the telescopic end of a telescopic mechanism I, and the telescopic mechanism I is fixedly connected to a moving mechanism;

[0007] A telescopic mechanism II is fixedly connected to the side of the intake cavity. The telescopic end of the telescopic mechanism II is fixedly connected to a filter plate cavity, and a plurality of filter holes are arranged at the bottom of the filter plate cavity;

[0008] An intake impeller is rotatably connected to the bottom of the purification cavity. A power mechanism I for driving the intake impeller to rotate is fixedly connected to the purification cavity. A plurality of cleaning plates are fixedly connected to the bottom of the intake impeller, and the cleaning plates can contact the inner side of the filter plate cavity;

[0009] Conversion cavities are arranged on both the left and right sides of the purification cavity, and an exhaust ring is fixedly connected to the top of the purification cavity;

[0010] Two high-voltage ionization plates are rotatably connected in each conversion cavity. A power connection column is fixedly connected to each high-voltage ionization plate. A wiring rotating ring is rotatably connected to the power connection column. Arc baffles are fixedly connected to both sides of each high-voltage ionization plate, and the arc baffles are rotatably connected in the conversion cavity;

[0011] Four sensors are fixedly connected to the side of the purification cavity. All four sensors are connected to the power mechanism I. A double-arc cam is fixedly connected to the power connection column, and the double-arc cam can contact the sensor;

[0012] A telescopic mechanism III is fixedly connected to the outside of the conversion cavity. A telescopic mechanism IV is fixedly connected to the telescopic end of the telescopic mechanism III. An adsorption pipeline is fixedly connected to the telescopic end of the telescopic mechanism IV. An adsorption cavity is fixedly connected to the adsorption pipeline. A plurality of adsorption holes are provided on the adsorption cavity, and the adsorption cavity can contact the high-voltage ionization plate;

[0013] An air pressure cavity is fixedly connected to the upper end of the exhaust ring. A plurality of expansion cavities are arranged in the air pressure cavity. An air pressure pipeline is fixedly connected to the air pressure cavity;

[0014] A telescopic mechanism V is fixedly connected to the purification cavity. A lifting bracket is fixedly connected to the telescopic end of the telescopic mechanism V. A rotating ring is rotatably connected to the lifting bracket. Two wiring columns are fixedly connected to the rotating ring. A conductive column is fixedly connected inside the rotating ring. A plurality of electrostatic dust collection plates are slidably connected to the conductive column. Compression springs are fixedly connected between the plurality of electrostatic dust collection plates. The plurality of electrostatic dust collection plates respectively pass through the plurality of expansion cavities and are inserted into the purification cavity. A power mechanism II for driving the rotating ring to rotate is fixedly connected to the lifting bracket. Two telescopic mechanisms VI are fixedly connected to the rotating ring. An insulating block is fixedly connected to the telescopic end of the telescopic mechanism VI, and the insulating block contacts the electrostatic dust collection plate. Description of the Drawings

[0015] The present invention will be further described in detail below with reference to the drawings and specific implementation methods.

[0016] Figure 1 is a schematic structural diagram of the electrostatic-based air purification equipment of the present invention;

[0017] Figure 2 is a cross-sectional view of the electrostatic-based air purification equipment of the present invention;

[0018] Figure 3 is a schematic structural diagram of the purification cavity of the present invention;

[0019] Figure 4 is a bottom view of the purification cavity of the present invention;

[0020] Figure 5 is a schematic structural diagram of the swing bracket of the present invention;

[0021] Figure 6 is a schematic structural view of the intake impeller of the present invention;

[0022] Figure 7 is a schematic structural view of the cleaning plate of the present invention;

[0023] Figure 8 is a schematic structural view of the high-voltage ionization plate of the present invention;

[0024] Figure 9 is a schematic structural view of the double-arc cam of the present invention;

[0025] Figure 10 is a schematic structural view of the air pressure cavity of the present invention;

[0026] Figure 11 is a bottom view of the air pressure cavity of the present invention;

[0027] Figure 12 is a sectional view of the air pressure cavity of the present invention;

[0028] Figure 13 is a schematic structural view of the adsorption cavity of the present invention;

[0029] Figure 14 is a schematic structural view of the electrostatic dust collection plate of the present invention;

[0030] Figure 15 is a sectional view of the electrostatic dust collection plate of the present invention.

[0031] In the figure: moving mechanism 11; telescopic mechanism I 12; swing motor 13; swing bracket 14; purification cavity 21; conversion cavity 22; exhaust ring 23; sensor 24; intake cavity 31; telescopic mechanism II 32; filter plate cavity 33; intake impeller 34; cleaning plate 35; arc baffle 41; high-voltage ionization plate 42; power connection post 43; double-arc cam 44; wiring swivel 45; air pressure cavity 51; expansion cavity 52; air pressure pipeline 53; telescopic mechanism III 61; telescopic mechanism IV 62; adsorption pipeline 63; adsorption cavity 64; telescopic mechanism V 71; lifting bracket 72; rotating ring 73; wiring post 74; conductive post 75; electrostatic dust collection plate 76; telescopic mechanism VI 77. Detailed implementation manners

[0032] The present invention will be further described in detail below with reference to the accompanying drawings.

[0033] As Figures 1 to 15 shown, in order to achieve the technical effect of "optimizing the adsorption efficiency of particulate matter and facilitating cleaning and maintenance by moving the electrostatic dust collection plate during the purification process", the structure and function of the electrostatic-based air purification device will be described in detail below;

[0034] An electrostatic-based air purification device, including a purification cavity 21, a filter plate cavity 33 is slidably connected to the bottom of the purification cavity 21, two rotatable high-voltage ionization plates 42 are respectively arranged on the left and right sides of the purification cavity 21, and a plurality of movable electrostatic dust collection plates 76 are arranged on the upper side of the purification cavity 21;

[0035] The incoming air is preliminarily filtered by the filter plate cavity 33, the high-voltage ionization plates 42 charge the particulate matters in the air, and the plurality of electrostatic dust collection plates 76 can move to adsorb the particulate matters in the air, optimizing the adsorption efficiency of the particulate matters;

[0036] The purification cavity 21 is fixedly connected to a swing bracket 14, the swing bracket 14 is fixedly connected to the output shaft of a swing motor 13, the swing motor 13 is fixedly connected to the telescopic end of a telescopic mechanism I 12, and the telescopic mechanism I 12 is fixedly connected to a moving mechanism 11;

[0037] A telescopic mechanism II 32 is fixedly connected to the side of the air inlet cavity 31, the telescopic end of the telescopic mechanism II 32 is fixedly connected to a filter plate cavity 33, and a plurality of filter holes are arranged at the bottom of the filter plate cavity 33;

[0038] An air inlet impeller 34 is rotatably connected to the bottom of the purification cavity 21, a power mechanism I for driving the air inlet impeller 34 to rotate is fixedly connected to the purification cavity 21, and a plurality of cleaning plates 35 are fixedly connected to the bottom of the air inlet impeller 34, and the cleaning plates 35 can contact the inner side of the filter plate cavity 33;

[0039] Conversion cavities 22 are arranged on both the left and right sides of the purification cavity 21, and an exhaust ring 23 is fixedly connected to the top of the purification cavity 21;

[0040] Two high-voltage ionization plates 42 are rotatably connected in each conversion cavity 22, a power connection column 43 is fixedly connected to each high-voltage ionization plate 42, a wiring rotating ring 45 is rotatably connected to the power connection column 43, arc-shaped baffles 41 are fixedly connected to both sides of each high-voltage ionization plate 42, and the arc-shaped baffles 41 are rotatably connected in the conversion cavity 22; a power mechanism III for driving the high-voltage ionization plates 42 to rotate is fixedly connected to the conversion cavity 22;

[0041] Four sensors 24 are fixedly connected to the side of the purification cavity 21, all four sensors 24 are connected to the power mechanism I, a double-arc cam 44 is fixedly connected to the power connection column 43, and the double-arc cam 44 can contact the sensors 24;

[0042] A telescopic mechanism III 61 is fixedly connected to the outer side of the conversion cavity 22. A telescopic mechanism IV 62 is fixedly connected to the telescopic end of the telescopic mechanism III 61. An adsorption pipeline 63 is fixedly connected to the telescopic end of the telescopic mechanism IV 62. An adsorption cavity 64 is fixedly connected to the adsorption pipeline 63. A plurality of adsorption holes are arranged on the adsorption cavity 64. The adsorption cavity 64 can be in contact with the high-voltage ionization plate 42;

[0043] The upper end of the exhaust ring 23 is fixedly connected to a pressure cavity 51. A plurality of expansion cavities 52 are arranged in the pressure cavity 51. A pressure pipeline 53 is fixedly connected to the pressure cavity 51;

[0044] A telescopic mechanism V 71 is fixedly connected to the purification cavity 21. A lifting bracket 72 is fixedly connected to the telescopic end of the telescopic mechanism V 71. A rotating ring 73 is rotatably connected to the lifting bracket 72. Two wiring columns 74 are fixedly connected to the rotating ring 73. A conductive column 75 is fixedly connected inside the rotating ring 73. A plurality of electrostatic precipitator plates 76 are slidably connected to the conductive column 75. Compression springs are fixedly connected between the plurality of electrostatic precipitator plates 76. The plurality of electrostatic precipitator plates 76 respectively pass through the plurality of expansion cavities 52 and are inserted into the purification cavity 21. A power mechanism II for driving the rotation of the rotating ring 73 is fixedly connected to the lifting bracket 72. Two telescopic mechanisms VI 77 are fixedly connected to the rotating ring 73. Insulating blocks are fixedly connected to the telescopic ends of the telescopic mechanisms VI 77. The insulating blocks are in contact with the electrostatic precipitator plates 76;

[0045] During use, as Figure 2 shown, start the power mechanism I. The output shaft of the power mechanism I starts to rotate. The output shaft of the power mechanism I drives the intake impeller 34 to rotate. When the intake impeller 34 rotates, it generates suction to adsorb external gas into the purification cavity 21. Due to the suction generated by the rotation of the intake impeller 34, the air initially passes through the filter plate cavity 33. The plurality of filter holes on the filter plate cavity 33 initially filter the air;

[0046] Furthermore, start the moving mechanism 11. The moving mechanism 11 can drive the purification cavity 21 to move, so that the purification cavity 21 moves to different positions. Start the telescopic mechanism I 12. The telescopic mechanism I 12 can be a hydraulic cylinder or an electric push rod. The telescopic end of the telescopic mechanism I 12 drives the swing motor 13 to move. The swing motor 13 drives the swing bracket 14 to move. The swing bracket 14 drives the purification cavity 21 to move, thereby adjusting the height of the purification cavity 21 and the height at which the gas enters. Start the swing motor 13. The output shaft of the swing motor 13 starts to rotate. The output shaft of the swing motor 13 drives the purification cavity 21 to move, so that the purification cavity 21 is flipped, thereby adjusting the orientation of the filter plate cavity 33 and further adjusting the orientation of the intake air;

[0047] Further, in order to ensure ventilation at the bottom of the filter plate cavity 33, during the rotation of the intake impeller 34, the intake impeller 34 drives the cleaning plate 35 to move. The telescopic mechanism II 32 can be activated. The telescopic mechanism II 32 can be a hydraulic cylinder or an electric push rod. The telescopic end of the telescopic mechanism II 32 drives the filter plate cavity 33 to move. The filter plate cavity 33 moves upward, causing the cleaning plate 35 to contact the filter plate cavity 33. The cleaning plate 35 rotates to clean the inner side of the filter plate cavity 33, keeping dust particles from accumulating inside the filter plate cavity 33, which would otherwise affect the adsorption effect of the filter plate cavity 33. Also, during normal air intake, the telescopic mechanism II 32 is activated so that the cleaning plate 35 does not contact the filter plate cavity 33, ensuring the rotation speed of the intake impeller 34. When cleaning is required, the cleaning plate 35 contacts the filter plate cavity 33;

[0048] Further, the wiring swivel 45 is pre-connected to the power supply so that the two high-voltage ionization plates 42 on both sides cause the particulate matter in the air to become charged through corona discharge. Since the high-voltage ionization plates 42 are in a dusty environment for a long time, to ensure the discharge effect of the high-voltage ionization plates 42, the high-voltage ionization plates 42 need to be cleaned regularly. When cleaning the high-voltage ionization plates 42, it should be noted that there are two high-voltage ionization plates 42 in each of the two conversion cavities 22, which are in two pairs, upper and lower. When cleaning is required, they need to be cleaned one pair at a time, that is, cleaning the two high-voltage ionization plates 42 in the upper pair or the two high-voltage ionization plates 42 in the lower pair;

[0049] The power mechanism III is activated. The output shaft of the power mechanism III drives the high-voltage ionization plate 42 to rotate. The high-voltage ionization plate 42 drives the electrical connection post 43 to rotate. The electrical connection post 43 drives the double arc cam 44 to rotate. The high-voltage ionization plate 42 drives the arc baffle 41 to rotate. The arc baffle 41 rotates to block the connection between the purification cavity 21 and the conversion cavity 22, ensuring that no gas flows out during the rotation of the high-voltage ionization plate 42. When the double arc cam 44 rotates, it contacts the sensor 24. The sensor 24 can be a contact sensor or a pressure sensor. When the two sensors 24 on the upper side or the two sensors 24 on the lower side are simultaneously squeezed, it proves that one high-voltage ionization plate 42 is flipping. At this time, one pair of high-voltage ionization plates 42 is not working. Then the sensor 24 controls the output shaft of the power mechanism I to slow down the rotation and reduce the air intake, ensuring effective ionization treatment of the particulate matter in the passing air;

[0050] After the flipping is completed, the double-arc cam 44 no longer presses the sensor 24. At the same time, the other side of the double-arc cam 44 moves to the designated position, and the surface of the double-arc cam 44 that needs to be cleaned moves to the outside. Then, the telescopic mechanism III 61 and the telescopic mechanism IV 62 are started. The telescopic mechanism III 61 and the telescopic mechanism IV 62 can be hydraulic cylinders or electric push rods. The telescopic end of the telescopic mechanism III 61 drives the telescopic mechanism IV 62 to move, and the telescopic end of the telescopic mechanism IV 62 drives the adsorption pipeline 63 to move. The adsorption pipeline 63 drives the adsorption cavity 64 to move, adjusts the position of the adsorption cavity 64, so that the adsorption cavity 64 contacts the high-voltage ionization plate 42 that needs to be cleaned, and cleans the side surface of the high-voltage ionization plate 42;

[0051] Further, when the particulate matter in the air passes through the two high-voltage ionization plates 42 on both sides and enters between the multiple electrostatic dust collection plates 76, the electrostatic dust collection plates 76 adsorb the particulate matter. The air pressure pipeline 53 is pre-connected to the air pump, and the air pump passes the gas into the air pressure pipeline 53. The air pressure pipeline 53 passes the gas into the air pressure cavity 51. The air pressure in the air pressure cavity 51 increases, and the expansion cavity 52 expands and squeezes inward to wrap the electrostatic dust collection plates 76, so that the gas in the purification cavity 21 cannot be discharged through the expansion cavity 52 and can only be discharged through the exhaust ring 23;

[0052] Further, when it is necessary to adjust the positions of the multiple electrostatic dust collection plates 76, the telescopic mechanism VI 77 is started. The telescopic mechanism VI 77 can be a hydraulic cylinder or an electric push rod. The telescopic end of the telescopic mechanism VI 77 drives the insulating block to move, so that the insulating block squeezes the multiple electrostatic dust collection plates 76 from both sides. The multiple electrostatic dust collection plates 76 slide on the conductive columns 75. The conductive columns 75 are electrically connected to the wiring columns 74, and the wiring columns 74 are connected to an external power supply. Compression springs are arranged between the multiple electrostatic dust collection plates 76, so that the relative distance between the multiple electrostatic dust collection plates 76 changes, and the electrostatic dust collection plates 76 squeeze the expansion cavity 52. During the movement of the electrostatic dust collection plates 76, since the expansion cavity 52 is made of an elastic material, the expansion cavity 52 is always wrapped outside the electrostatic dust collection plates 76 under the pressure of the air pressure. Therefore, it is ensured that during the continuous movement of the electrostatic dust collection plates 76, the gas in the purification cavity 21 can only be discharged through the exhaust ring 23. By continuously changing the positions of the multiple electrostatic dust collection plates 76, the adsorption efficiency of the particulate matter is optimized;

[0053] Further, the power mechanism II can also be activated. The output shaft of the power mechanism II drives the rotating ring 73 to rotate. The rotating ring 73 drives a plurality of electrostatic dust collection plates 76 to rotate, adjusting the positions of the plurality of electrostatic dust collection plates 76. The output shaft of the power mechanism II drives the rotating ring 73 to continuously rotate within a small range, and the plurality of electrostatic dust collection plates 76 continuously swing. During the swinging process of the electrostatic dust collection plates 76, since the expansion cavity 52 is made of an elastic material, the expansion cavity 52 is always wrapped around the outside of the electrostatic dust collection plates 76 under the pressure of the air pressure. Thus, during the continuous swinging process of the electrostatic dust collection plates 76, the gas in the purification cavity 21 can only be discharged through the exhaust ring 23. Through the continuous position change of the plurality of electrostatic dust collection plates 76, the adsorption efficiency of particulate matter is optimized;

[0054] Further, when it is necessary to adsorb and clean the plurality of electrostatic dust collection plates 76, the air pressure pipeline 53 discharges gas, and the plurality of expansion cavities 52 contract outward. The expansion cavities 52 no longer wrap around the electrostatic dust collection plates 76, forming a certain space between the electrostatic dust collection plates 76 and the expansion cavities 52. The telescopic mechanism V71 is activated. The telescopic mechanism V71 can be a hydraulic cylinder or an electric push rod. The telescopic end of the telescopic mechanism V71 drives the lifting bracket 72 to move. The lifting bracket 72 drives the plurality of electrostatic dust collection plates 76 to move upward, so that the upper ends of the electrostatic dust collection plates 76 move to the upper ends of the plurality of expansion cavities 52. The air pressure pipeline 53 is inflated, causing the plurality of expansion cavities 52 to expand inward. Then, the telescopic mechanism V71 is activated. The telescopic end of the telescopic mechanism V71 drives the plurality of electrostatic dust collection plates 76 to move downward, so that the electrostatic dust collection plates 76 pass through the expansion cavities 52 and are inserted into the purification cavity 21. Due to the squeezing contact between the expansion cavities 52 and the electrostatic dust collection plates 76, the dust adsorbed on the electrostatic dust collection plates 76 is left on the upper side of the expansion cavities 52, thereby completing the cleaning of the electrostatic dust collection plates 76. At this time, only the upper side of the expansion cavities 52 needs to be cleaned, optimizing the ash cleaning process of the electrostatic dust collection plates 76 and enabling rapid ash cleaning.

Claims

1. An electrostatic-based air purification device, comprising a purification cavity (21), characterized in that: A filter plate cavity (33) is slidably connected to the bottom of the purification cavity (21). Two high-voltage ionization plates (42) that can be flipped are respectively arranged on the left and right sides of the purification cavity (21). A plurality of movable electrostatic dust collection plates (76) are arranged on the upper side of the purification cavity (21).

2. The air purification device based on static electricity according to claim 1, wherein: The purification cavity (21) is fixedly connected to a swing bracket (14). The swing bracket (14) is fixedly connected to the output shaft of a swing motor (13). The swing motor (13) is fixedly connected to the telescopic end of a telescopic mechanism I (12). The telescopic mechanism I (12) is fixedly connected to a moving mechanism (11).

3. The air purification device based on static electricity according to claim 1, characterized in that: A telescopic mechanism II (32) is fixedly connected to the side of the air inlet cavity (31). The telescopic end of the telescopic mechanism II (32) is fixedly connected to a filter plate cavity (33). A plurality of filter holes are arranged at the bottom of the filter plate cavity (33).

4. The air purification device based on static electricity according to claim 3, characterized in that: An air inlet impeller (34) is rotatably connected to the bottom of the purification cavity (21). A power mechanism I for driving the air inlet impeller (34) to rotate is fixedly connected to the purification cavity (21). A plurality of cleaning plates (35) are fixedly connected to the bottom of the air inlet impeller (34). The cleaning plates (35) can contact the inner side of the filter plate cavity (33).

5. The air purification device based on static electricity according to claim 4, characterized in that: Conversion cavities (22) are arranged on both the left and right sides of the purification cavity (21). An exhaust ring (23) is fixedly connected to the top of the purification cavity (21).

6. The air purification device based on static electricity according to claim 5, wherein: Two high-voltage ionization plates (42) are rotatably connected in each conversion cavity (22). A power connection column (43) is fixedly connected to each high-voltage ionization plate (42). A wiring rotating ring (45) is rotatably connected to the power connection column (43). Arc-shaped baffles (41) are fixedly connected to both sides of each high-voltage ionization plate (42). The arc-shaped baffles (41) are rotatably connected in the conversion cavity (22).

7. The air purification device based on static electricity according to claim 6, wherein: Four sensors (24) are fixedly connected to the side of the purification cavity (21). All four sensors (24) are connected to the power mechanism I. A double-arc cam (44) is fixedly connected to the power connection column (43). The double-arc cam (44) can contact the sensors (24).

8. The air purification device based on static electricity according to claim 6, wherein: A telescopic mechanism III (61) is fixedly connected to the outside of the conversion cavity (22). The telescopic end of the telescopic mechanism III (61) is fixedly connected to a telescopic mechanism IV (62). The telescopic end of the telescopic mechanism IV (62) is fixedly connected to an adsorption pipeline (63). An adsorption cavity (64) is fixedly connected to the adsorption pipeline (63). A plurality of adsorption holes are arranged on the adsorption cavity (64). The adsorption cavity (64) can contact the high-voltage ionization plate (42).

9. The air purification device based on static electricity according to claim 5, wherein: A pressure cavity (51) is fixedly connected to the upper end of the exhaust ring (23). A plurality of expansion cavities (52) are arranged in the pressure cavity (51). A pressure pipeline (53) is fixedly connected to the pressure cavity (51).

10. An electrostatic-based air purification device according to claim 9, wherein: A telescopic mechanism Ⅴ (71) is fixedly connected to the purification cavity (21). A lifting bracket (72) is fixedly connected to the telescopic end of the telescopic mechanism Ⅴ (71). A rotating ring (73) is rotatably connected to the lifting bracket (72). Two terminal posts (74) are fixedly connected to the rotating ring (73). A conductive column (75) is fixedly connected inside the rotating ring (73). A plurality of electrostatic dust collection plates (76) are slidably connected to the conductive column (75). Compression springs are fixedly connected between the plurality of electrostatic dust collection plates (76). The plurality of electrostatic dust collection plates (76) respectively pass through a plurality of expansion cavities (52) and are inserted into the purification cavity (21). A power mechanism Ⅱ for driving the rotation of the rotating ring (73) is fixedly connected to the lifting bracket (72). Two telescopic mechanisms Ⅵ (77) are fixedly connected to the rotating ring (73). An insulating block is fixedly connected to the telescopic end of the telescopic mechanism Ⅵ (77). The insulating block contacts the electrostatic dust collection plate (76).

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