Exhaust purification device and control method thereof

Abstract

The invention relates to the technical field of gas purification, in particular to an exhaust purification device which comprises a range hood body, an air inlet pipe, a smoke suction cover, an exhaust pipe and a controller. The range hood body is installed on a kitchen wall, and the air inlet pipe is installed at the air inlet end of the range hood body and communicates with the air inlet end of the range hood body; one end of the air inlet pipe is fixed and communicated with the smoke suction cover, the exhaust pipe is installed at the air outlet end of the range hood body, a decontamination assembly is arranged in the air inlet pipe and comprises a sliding seat and a scraping ring, the sliding seat slides in the length direction of the exhaust pipe, a driving assembly is arranged between the air inlet pipe and the sliding seat, and the scraping ring is installed on the sliding seat. The outer wall of the scraping ring abuts against the inner wall of the air inlet pipe, a decontamination opening is formed in the lower surface of the air inlet pipe and covered with a cover plate, and the controller is used for controlling the driving assembly to be started and stopped.

Description

Technical Field

[0001] This application relates to the field of gas purification technology, and in particular to an exhaust gas purification device and a control method for the exhaust gas purification device. Background Technology

[0002] "Air purification" can be understood from two related aspects: first, air purification refers to the "action" of cleaning the air; second, it refers to the clean "state" of the clean air. The purpose of air purification is to bring polluted air to a state required for production and daily life, or to achieve a certain level of cleanliness. Correspondingly, as people's living standards continue to improve and their awareness of health and environmental protection increases, people desire a healthy, clean, and environmentally friendly home kitchen environment, especially regarding the purification of cooking fumes, which is of great concern to users.

[0003] Currently, kitchen exhaust systems are commonly used in residential kitchens. These systems typically involve connecting an air intake pipe to the air intake end of the range hood, with a fume hood at the end of the intake pipe to absorb the fumes, and then connecting an exhaust pipe to the air outlet end of the range hood to directly discharge the fumes.

[0004] However, some of the fumes generated during cooking usually cool down in the middle and rear sections of the air intake pipe when they come into contact with the inner wall of the pipe. The resulting gel-like waste oil may adhere to the inside of the air intake pipe. When the exhaust system has been used for a long time, the inner wall of the air intake pipe will produce an odor due to the contamination of the gel-like waste oil, which will affect the cleanliness of the kitchen environment. Summary of the Invention

[0005] To improve the cleanliness of the kitchen environment, this application provides an exhaust purification device and a control method for the exhaust purification device.

[0006] The exhaust gas purification device and its control method provided in this application adopt the following technical solution: In one aspect, an exhaust purification device includes a range hood body, an air inlet pipe, a fume hood, an exhaust pipe, and a controller. The range hood body is installed on a kitchen wall. The air inlet pipe is installed at the air inlet end of the range hood body and communicates with the air inlet end of the range hood body. One end of the air inlet pipe is fixed to and communicates with the fume hood. The exhaust pipe is installed at the air outlet end of the range hood body. A cleaning component is provided inside the air inlet pipe. The cleaning component includes a sliding seat and a scraper ring. The sliding seat slides along the length direction of the exhaust pipe. A drive component is provided between the air inlet pipe and the sliding seat. The scraper ring is installed on the sliding seat. The outer wall of the scraper ring abuts against the inner wall of the air inlet pipe. A cleaning port is opened on the lower surface of the air inlet pipe. The cleaning port is covered by a cover plate. The controller is used to control the opening and closing of the drive component.

[0007] By adopting the above technical solution, when the range hood body is idle, the controller starts the drive component. The drive component drives the scraper ring to slide along the length of the air intake pipe. During the movement of the scraper ring, the outer wall of the scraper ring scrapes off the gelatinous waste oil adhering to the inner wall of the air intake pipe. The gelatinous waste oil falls to the inner wall below the air intake pipe due to gravity, and is then pushed by the scraper ring to the cleaning port. Opening the cover allows the gelatinous waste oil to be discharged from the cleaning port. The inner wall of the air intake pipe produces odors due to the contamination of the gelatinous waste oil, thereby improving the cleanliness of the kitchen environment.

[0008] Preferably, the drive assembly includes a drive motor, a transmission gear, and a transmission rack. The drive motor is mounted on the sliding seat, the transmission gear is coaxially fixed to the end of the output shaft of the drive motor, the transmission rack is mounted on the inner wall of the intake pipe, the transmission rack is arranged along the length direction of the intake pipe, the sliding seat is supported on the transmission rack, and the transmission gear and the gear rack mesh with each other.

[0009] By adopting the above technical solution, the drive motor is started, the output shaft of the drive motor rotates, and then drives the transmission gear to rotate. Since the transmission gear and the transmission rack mesh with each other, the transmission gear can roll along the length direction of the transmission rack, thereby driving the sliding seat to slide.

[0010] Preferably, the drive motor and the scraper ring assembly are provided with a connecting component. The connecting component includes a first belt drive mechanism and a connecting rod. One of the pulleys of the first belt drive mechanism is coaxially fixed with the transmission gear, and the other pulley of the first belt drive mechanism is rotatably supported on the sliding seat. The two ends of the connecting rod are respectively hinged to the other pulley of the first belt drive mechanism and the scraper ring.

[0011] By adopting the above technical solution, the drive motor is started, and the output shaft of the drive motor rotates, which drives one of the pulleys of the first belt drive mechanism to rotate, and makes the other pulley of the first belt drive mechanism rotate synchronously, so that the connecting rod can swing relative to each other, thereby pulling the scraper ring to slide repeatedly in the horizontal direction, thereby repeatedly scraping off the gelatinous waste oil in the air intake pipe.

[0012] Preferably, the scraper ring is provided with a widening plate on the inner wall below the air intake pipe.

[0013] By adopting the above technical solution, the widened plate can increase the area below the scraper ring, enabling the scraper ring to push more gelatinous waste oil.

[0014] Preferably, a cleaning assembly is provided on the sliding seat. The cleaning assembly is located in front of the scraper ring. The cleaning assembly includes an electric nozzle and a liquid storage tank. The liquid storage tank is installed at the liquid inlet of the electric nozzle, and the liquid outlet of the electric nozzle faces the inner wall of the air inlet pipe.

[0015] By adopting the above technical solution, the liquid storage tank provides cleaning fluid to the electric nozzle, which sprays the cleaning fluid onto the inner wall of the air inlet pipe, and the scraper ring enhances the cleaning effect.

[0016] Preferably, a mounting base is rotatably supported on the sliding base, the electric nozzle is mounted on the mounting base, and a transmission assembly is provided between the mounting base and the drive motor.

[0017] By adopting the above technical solution, the mounting base drives the electric nozzle to rotate under the transmission action of the transmission component, thereby enabling the electric nozzle to better act on the inner wall of the air inlet pipe.

[0018] Preferably, the transmission assembly includes a second belt drive mechanism and two meshing bevel gears. One pulley of the second belt drive mechanism is coaxially fixed to the output shaft of the drive motor, and the other pulley of the second belt drive mechanism is rotatably supported on the sliding seat. One bevel gear is coaxially fixed to one pulley of the second belt drive mechanism, and the other bevel gear is coaxially fixed to the mounting seat.

[0019] By adopting the above technical solution, the drive motor is started, the output shaft of the drive motor rotates, and then drives one of the pulleys of the second belt drive mechanism to rotate, so that the other pulley of the second belt drive mechanism rotates synchronously with one of the bevel gears. Under the transmission of the two meshing bevel gears, the mounting base rotates.

[0020] Preferably, a collection box is provided on the lower surface of the air intake pipe, the collection box is located below the decontamination port, a return spring is provided between the cover plate and the collection box, a wedge block is provided on the upper surface of the cover plate, and an abutment rod is fixed to the side wall of the scraper ring, the abutment rod abutting with the wedge block.

[0021] By adopting the above technical solution, after the scraper ring moves a certain distance, the abutting rod abuts against the wedge block, the wedge block slides relative to each other, the return spring is compressed, and the cover plate moves downward, the decontamination port opens, so that the gelatinous waste oil can fall from the decontamination port into the collection box, improving the convenience of treating gelatinous waste oil.

[0022] Preferably, the upper surface of the cover plate is provided with a slope, which slopes downward toward the outside of the air intake pipe.

[0023] By adopting the above technical solution, the upper surface of the cover plate is sloped to improve the efficiency of the gelatinous waste oil on the cover plate surface sliding into the collection box.

[0024] On the other hand, a control method for an exhaust gas purification device, implemented using the aforementioned exhaust gas purification device, includes the following steps: S1: Start the range hood body. Through the cooperation of the air intake pipe and the smoke hood, the range hood body filters the oil fumes and the exhaust pipe discharges the gas. S2: Based on the controller's response, start the driver component; S3: The drive component controls the movement of the sliding seat, and the scraper ring removes dirt.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. It can discharge gelatinous waste oil from the decontamination port. The inner wall of the air inlet pipe produces odors due to the contamination of the gelatinous waste oil, thereby improving the cleanliness of the kitchen environment. 2. The storage tank provides cleaning fluid to the electric nozzle, which sprays the cleaning fluid onto the inner wall of the air inlet pipe, and works in conjunction with the scraper ring to improve the cleaning effect; 3. This allows the gelatinous waste oil to fall from the sludge outlet into the collection box, improving the convenience of treating gelatinous waste oil. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an exhaust purification device according to an embodiment of this application.

[0027] Figure 2 This is a diagram showing the coordination relationship between the decontamination component, drive component, connection component, transmission component, and cleaning component of an exhaust purification device according to an embodiment of this application.

[0028] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0029] Figure 4 This is a diagram showing the fit between the collection box and the cover plate of an exhaust purification device according to an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Range hood body; 2. Air inlet pipe; 21. Cover plate; 211. Wedge block; 212. Inclined surface; 3. Fume hood; 4. Exhaust pipe; 5. Stain removal assembly; 51. Sliding seat; 511. Guide block; 512. Mounting base; 513. Mounting plate; 5131. Mounting rod; 514. Baffle plate; 52. Scraper ring; 521. Widening plate; 522. Abutment rod; 6. Drive assembly; 61. Drive motor; 62. Transmission gear; 63. Transmission rack; 631. Guide groove; 7. Connecting assembly; 71. First belt drive mechanism; 72. Connecting rod; 8. Cleaning assembly; 81. Electric nozzle; 82. Liquid storage tank; 9. Transmission assembly; 91. Second belt drive mechanism; 92. Bevel gear; 10. Collection box; 101. Slot; 102. Bearing block; 103. Return spring. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0032] This application discloses an exhaust gas purification device and a control method for the exhaust gas purification device. (Refer to...) Figure 1 An exhaust purification device includes a range hood body 1, an air inlet pipe 2, a fume hood 3, an exhaust pipe 4, and a controller (not shown in the figure). The range hood body 1 is installed on the kitchen wall. The air inlet pipe 2 is installed at the air inlet end of the range hood body 1, located at the front of the range hood. The air inlet pipe 2 is horizontally positioned and connected to the air inlet end of the range hood body 1. One end of the air inlet pipe 2 is fixed and connected to the fume hood 3, the lower surface of which is open. The exhaust pipe 4 is installed at the air outlet end of the range hood body 1 and connected to the building's exhaust pipe 4. In this embodiment, the air inlet pipe 2 is formed by bolting two pipe sections. One bent section is fixed to the fume hood 3, and the other horizontal section is fixed to the range hood body 1. In this application, the gelatinous waste oil inside the air inlet pipe 2 is mainly generated on the inner wall of the horizontal section.

[0033] Reference Figure 2 and Figure 3In addition, a cleaning component 5 is installed inside the air intake pipe 2. Specifically, the cleaning component 5 includes a sliding seat 51 and a scraper ring 52. The sliding seat 51 slides along the length of the exhaust pipe 4. The cross-section of the sliding seat 51 is rectangular. A drive component 6 is installed between the air intake pipe 2 and the sliding seat 51. At the same time, the controller is electrically connected to the range hood body 1 and the drive component 6. The controller is used to control the opening and closing of the drive component 6. The controller is a conventional processor. The range hood body 1 can issue commands to the controller to make the controller control the drive component 6 to start. The drive component 6 is used to drive the sliding seat 51 to slide. In addition, the scraper ring 52 is installed on the sliding seat 51. The outer wall of the scraper ring 52 abuts against the inner wall of the air inlet pipe 2. The scraper ring 52 is provided with scraping teeth facing the side wall of the range hood body 1. The scraping teeth are set with a fine structure with a triangular cross section. A cleaning port (not shown in the figure) is opened on the lower surface of the air inlet pipe 2. The cleaning port is located on the side of the air inlet pipe 2 close to the range hood body 1. The cleaning port is covered by a cover plate 21, and a sealing gasket is installed on the inner wall of the cleaning port. The side wall of the sealing gasket abuts against the side wall of the cover plate 21.

[0034] Therefore, when the range hood body 1 is idle, the drive component 6 is started by controlling the controller. The drive component 6 drives the scraper ring 52 to slide along the length of the air intake pipe 2. During the movement of the scraper ring 52, the outer wall of the scraper ring 52 scrapes off the gelatinous waste oil adhering to the inner wall of the air intake pipe 2. The gelatinous waste oil falls to the inner wall below the air intake pipe 2 due to gravity, and is then pushed by the scraper ring 52 to the cleaning port. Opening the cover plate 21 allows the gelatinous waste oil to be discharged from the cleaning port. The inner wall of the air intake pipe 2 produces odors due to the contamination of the gelatinous waste oil, thereby improving the cleanliness of the kitchen environment.

[0035] Specifically, the drive assembly 6 includes a drive motor 61, a transmission gear 62, and a transmission rack 63. The drive motor 61 is mounted on the side wall of the sliding seat 51 and is horizontally positioned, with its output shaft passing through the side wall of the sliding seat 51. The transmission gear 62 is coaxially fixed to the end of the output shaft of the drive motor 61. The transmission rack 63 is mounted on the inner wall of the intake pipe 2, specifically above the inner wall of the intake pipe 2, and is positioned along the length of the intake pipe 2. A guide groove 631 is formed on the side wall of the transmission rack 63 along its length. A guide block 511 is fixed to the top of the sliding seat 51 and slides within the guide groove 631. Simultaneously, a scraper ring 52 also slides within the guide groove 631. The transmission gear 62 meshes with the gear rack.

[0036] Therefore, when the drive motor 61 is started, the output shaft of the drive motor 61 rotates, which in turn drives the transmission gear 62 to rotate. Since the transmission gear 62 meshes with the transmission rack 63, the transmission gear 62 can roll along the length of the transmission rack 63, thereby driving the sliding seat 51 to slide.

[0037] Furthermore, the drive motor 61 and the scraper ring 52 assembly are provided with a connecting component 7. The connecting component 7 includes a first belt drive mechanism 71 and a connecting rod 72. One of the pulleys of the first belt drive mechanism 71 is coaxially fixed with the transmission gear 62, and the other pulley of the first belt drive mechanism 71 is rotatably supported on the sliding seat 51. One end of the connecting rod 72 is respectively connected to the other pulley of the first belt drive mechanism 71. A hinge seat is fixed to the inner wall of the scraper ring 52, and the other end of the connecting rod 72 is hinged to the hinge seat.

[0038] Therefore, when the drive motor 61 is started, the output shaft of the drive motor 61 rotates, which in turn drives one of the pulleys of the first belt drive mechanism 71 to rotate, and causes the other pulley of the first belt drive mechanism 71 to rotate synchronously, so that the connecting rod 72 can swing relative to each other, thereby pulling the scraper ring 52 to slide repeatedly in the horizontal direction. Under the guidance of the guide groove 631, the scraper ring 52 can repeatedly scrape off the gelatinous waste oil in the air intake pipe 2, thereby improving the decontamination ability.

[0039] Furthermore, a widening plate 521 is provided on the inner wall below the air intake pipe 2 near the scraper ring 52. When the scraper ring 52 moves a certain distance, the surface of the widening plate 521 comes into contact with the gelatinous waste oil below the inner wall of the air intake pipe 2. The widening plate 521 can increase the area below the scraper ring 52, enabling the scraper ring 52 to push more gelatinous waste oil.

[0040] On the other hand, a cleaning assembly 8 is provided on the sliding seat 51. The cleaning assembly 8 is located in front of the scraper ring 52. The cleaning assembly 8 includes an electric nozzle 81 and a liquid storage tank 82. The liquid storage tank 82 is installed at the liquid inlet of the electric nozzle 81, and the liquid outlet of the electric nozzle 81 faces the inner wall of the air inlet pipe 2. In this embodiment, the liquid storage tank 82 is filled with cleaning fluid for cleaning oil stains.

[0041] Furthermore, a mounting base 512 is rotatably supported on the sliding seat 51, and the electric nozzle 81 is mounted on the mounting base 512. A transmission assembly 9 is provided between the mounting base 512 and the drive motor 61. Specifically, the transmission assembly 9 includes a second belt drive mechanism 91 and two meshing bevel gears 92. One pulley of the second belt drive mechanism 91 is coaxially fixed to the output shaft of the drive motor 61, and the other pulley of the second belt drive mechanism 91 is rotatably supported on the sliding seat 51. One bevel gear 92 is coaxially fixed to one pulley of the second belt drive mechanism 91. A mounting plate 513 is vertically fixed to the side wall of the sliding seat 51, and a mounting rod 5131 is rotatably supported on the mounting plate 513. The other bevel gear 92 is coaxially fixed to one end of the mounting rod 5131, and the mounting base 512 is coaxially fixed to the other end of the mounting rod 5131.

[0042] Therefore, the drive motor 61 is started, and the output shaft of the drive motor 61 rotates, which in turn drives one of the pulleys of the second belt drive mechanism 91 to rotate, so that the other pulley of the second belt drive mechanism 91 rotates synchronously with one of the bevel gears 92. Under the transmission of the two meshing bevel gears 92, the mounting base 512 rotates, thereby allowing the electric nozzle 81 to better act on the inner wall of the air intake pipe 2. Since the liquid storage tank 82 provides cleaning fluid to the electric nozzle 81, the electric nozzle 81 sprays cleaning fluid onto the inner wall of the air intake pipe 2, which, together with the scraper ring 52, improves the cleaning effect.

[0043] Furthermore, a baffle plate 514 is fixed to the side wall of the sliding plate. The baffle plate 514 is inclined and located above the drive motor 61. In this embodiment, the baffle plate 514 is made of acrylic sheet with a certain degree of transparency. The baffle plate 514 is used to block the falling gelatinous waste oil and guide the gelatinous waste oil to the inner wall below the air intake pipe 2.

[0044] Reference Figure 1 and Figure 4 On the other hand, a collection box 10 is fixed to the lower surface of the air intake pipe 2, and a slot 101 is provided on the upper surface of the collection box 10. An elastic hook (not shown in the figure) is fixed to the lower surface of the air intake pipe 2. The elastic hook engages in the slot 101 to fix the collection box 10 to the air intake pipe 2. At the same time, the top of the collection box 10 is open, and a bearing block 102 is fixed to the inner wall of the collection box 10. A return spring 103 is vertically fixed to the upper surface of the bearing block 102, and the top of the return spring 103 is fixed to the lower surface of the cover plate 21. In addition, a wedge block 211 is fixed to the upper surface of the cover plate 21. When the scraper ring 52 moves a certain distance in the horizontal direction, an abutment rod 522 is fixed to the side wall of the scraper ring 52 (in conjunction with...). Figure 2 The abutting rod 522 abuts against the wedge block 211.

[0045] Specifically, after the scraper ring 52 moves a certain distance, the abutting rod 522 abuts against the wedge block 211, the wedge block 211 slides relative to each other, the return spring 103 is compressed, which causes the cover plate 21 to move downward and the cleaning port to open, so that the gel-like waste oil can fall from the cleaning port into the collection box 10, improving the convenience of handling gel-like waste oil.

[0046] Furthermore, the upper surface of the cover plate 21 is provided with a slope 212, which slopes downward toward the outside of the air intake pipe 2, thereby improving the efficiency of the gel-like waste oil on the surface of the cover plate 21 sliding into the collection box 10, so that the gel-like waste oil can be discharged better.

[0047] This application also provides a control method for an exhaust gas purification device, which is executed using the aforementioned exhaust gas purification device and includes the following steps: S1: Start the range hood body 1. Through the cooperation of the air inlet pipe 2 and the smoke hood 3, the range hood body 1 filters the oil fumes and the exhaust pipe 4 discharges the gas. S2: Based on the controller's response, start driver component 6; S3: Drive component 6 controls the movement of sliding seat 51, and scraper ring 52 performs cleaning.

[0048] The implementation principle of the exhaust purification device and its control method in this application embodiment is as follows: The drive motor 61 is started, and the output shaft of the drive motor 61 rotates, thereby driving the transmission gear 62 to rotate. Since the transmission gear 62 meshes with the transmission rack 63, the transmission gear 62 can roll along the length direction of the transmission rack 63, thereby driving the sliding seat 51 to slide, and driving the scraper ring 52 to slide along the length direction of the air intake pipe 2. During the movement of the scraper ring 52, the outer wall of the scraper ring 52 scrapes off the gelatinous waste oil adhering to the inner wall of the air intake pipe 2. The gelatinous waste oil falls onto the inner wall below the air intake pipe 2 due to gravity, and is then pushed by the scraper ring 52 towards the decontamination port. Opening the cover plate 21 allows the gelatinous waste oil to be discharged from the decontamination port. The inner wall of the air intake pipe 2 produces an odor due to the contamination of the gelatinous waste oil, thereby improving the cleanliness of the kitchen environment.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An exhaust gas purification device, characterized in that: The range hood includes a main body (1), an air inlet pipe (2), a smoke hood (3), an exhaust pipe (4), and a controller. The main body (1) is installed on the kitchen wall. The air inlet pipe (2) is installed at the air inlet end of the main body (1) and is connected to the air inlet end of the main body (1). One end of the air inlet pipe (2) is fixed to and connected to the smoke hood (3). The exhaust pipe (4) is installed at the air outlet end of the main body (1). A cleaning component (5) is installed inside the air inlet pipe (2). (5) Includes a sliding seat (51) and a scraper ring (52). The sliding seat (51) slides along the length of the exhaust pipe (4). A drive assembly (6) is provided between the intake pipe (2) and the sliding seat (51). The scraper ring (52) is mounted on the sliding seat (51). The outer wall of the scraper ring (52) abuts against the inner wall of the intake pipe (2). A cleaning port is provided on the lower surface of the intake pipe (2). The cleaning port is covered by a cover plate (21). The controller is used to control the opening and closing of the drive assembly (6).

2. The exhaust gas purification device according to claim 1, characterized in that: The drive assembly (6) includes a drive motor (61), a transmission gear (62), and a transmission rack (63). The drive motor (61) is mounted on the sliding seat (51). The transmission gear (62) is coaxially fixed to the end of the output shaft of the drive motor (61). The transmission rack (63) is mounted on the inner wall of the air intake pipe (2). The transmission rack (63) is arranged along the length direction of the air intake pipe (2). The sliding seat (51) is supported on the transmission rack (63). The transmission gear (62) meshes with the gear rack.

3. The exhaust gas purification device according to claim 2, characterized in that: The drive motor (61) and the scraper ring (52) assembly are provided with a connecting component (7). The connecting component (7) includes a first belt drive mechanism (71) and a connecting rod (72). One of the pulleys of the first belt drive mechanism (71) is coaxially fixed with the transmission gear (62). The other pulley of the first belt drive mechanism (71) is rotatably supported on the sliding seat (51). The two ends of the connecting rod (72) are respectively hinged to the other pulley of the first belt drive mechanism (71) and the scraper ring (52).

4. The exhaust gas purification device according to claim 1, characterized in that: The scraper ring (52) is provided with a widening plate (521) on the inner wall below the air intake pipe (2).

5. The exhaust gas purification device according to claim 2, characterized in that: A cleaning assembly (8) is provided on the sliding seat (51). The cleaning assembly (8) is located on the front side of the scraper ring (52). The cleaning assembly (8) includes an electric nozzle (81) and a liquid storage tank (82). The liquid storage tank (82) is installed at the liquid inlet of the electric nozzle (81), and the liquid outlet of the electric nozzle (81) faces the inner wall of the air inlet pipe (2).

6. The exhaust gas purification device according to claim 5, characterized in that: The sliding seat (51) rotatably supports the mounting base (512), the electric nozzle (81) is mounted on the mounting base (512), and a transmission assembly (9) is provided between the mounting base (512) and the drive motor (61).

7. The exhaust gas purification device according to claim 6, characterized in that: The transmission assembly (9) includes a second belt drive mechanism (91) and two meshing bevel gears (92). One of the pulleys of the second belt drive mechanism (91) is coaxially fixed with the output shaft of the drive motor (61), and the other pulley of the second belt drive mechanism (91) is rotatably supported on the sliding seat (51). One of the bevel gears (92) is coaxially fixed with one of the pulleys of the second belt drive mechanism (91), and the other bevel gear (92) is coaxially fixed with the mounting base (512).

8. The exhaust gas purification device according to claim 1, characterized in that: A collection box (10) is provided on the lower surface of the air intake pipe (2). The collection box (10) is located below the decontamination port. A return spring (103) is provided between the cover plate (21) and the collection box (10). A wedge block (211) is provided on the upper surface of the cover plate (21). An abutment rod (522) is fixed on the side wall of the scraper ring (52). The abutment rod (522) abuts against the wedge block (211).

9. An exhaust gas purification device according to claim 8, characterized in that: The upper surface of the cover plate (21) is provided with a slope (212), which slopes downward toward the outside of the air intake pipe (2).

10. A control method for an exhaust gas purification device, performed using the exhaust gas purification device according to any one of claims 1-9, characterized in that: Includes the following steps: S1: Start the range hood body (1), and through the cooperation of the air inlet pipe (2) and the smoke hood (3), the range hood body (1) filters the oil fumes, and the exhaust pipe (4) discharges the gas; S2: Based on the controller's response, start the driver component (6); S3: The drive assembly (6) controls the movement of the sliding seat (51), and the scraper ring (52) performs cleaning.

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