Range hood device

Abstract

The invention discloses a range hood device, and relates to the technical field of environmental protection, the range hood device comprises a shell, an outer cover is fixed around the shell, a touch screen is arranged at the bottom of one side of the shell, a fan shell is fixedly mounted in the shell, and a wind wheel is rotatably connected in the fan shell; a plurality of water inlet pipes are fixedly mounted at the top of the fan shell, the bottoms of the water inlet pipes are close to the edge of the wind wheel, a heating plate is slidably connected to the interior of the shell, a rotating shaft is rotatably connected to the center of the top of the fan shell, and the rotating shaft is sleeved with a first belt. A pair of sliding blocks is fixedly connected to the top of the fan shell, a fixing rod is slidably connected to each sliding block, a first cleaning rod and a second cleaning rod are installed on the two fixing rods, and oil stains left on the surface of a wind wheel are removed by making contact with the surface of the wind wheel through the first cleaning rods and the second cleaning rods. And through resetting of a second spring, a first cleaning rod and a second cleaning rod rub each other, automatic cleaning can be achieved between the first cleaning rod and the second cleaning rod, the cleanliness of the surface of the wind wheel is improved, and the smoke exhaust effect of the equipment is improved.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection technologies, and specifically to an oil fume machine device. Background Art

[0002] An oil fume machine is an electrical appliance used to suck out oil fumes generated during cooking. Besides performing its functional role well, it should possess a decorative concept that integrates with the modern kitchen layout. With the development of oil fume machines, they are no longer limited to simple tools for removing kitchen oil fumes, but have added more entertainment functions and usage functions, such as an entertainment oil fume machine with a TV monitor, an oil fume machine integrated with a smart home security system, a network oil fume machine with network control, etc. Oil fume machines need to be cleaned regularly. Simple cleaning cannot remove the oil stains, and professional cleaning agents must be used to clean the oil fume machines.

[0003] Currently, there are already oil fume extractors with integrated automatic cleaning on the market. The existing technology uses an electric heating wire installed outside the fan housing. When the oil fume machine starts cleaning, the power supply is turned on to energize the electric heating wire to generate heat, and the impeller inside the oil fume machine automatically starts to rotate intermittently. Although the temperature generated by the electric heating is similar to the effect of hot water, the rotation of the impeller driven by the oil fume machine motor cannot clean the oil stains on itself and inside it. This is because the electric heating cleaning technology uses a heating plate installed in a small area outside the fan housing. After heating is started, only this area can be locally heated, and the temperature cannot be quickly conducted to the whole. At the same time, the motor and the impeller are fasteners and do not generate vibrations during normal rotation. Therefore, the oil stains on them are difficult to be cleaned as the temperature rises. For this reason, we propose an oil fume machine device. Summary of the Invention

[0004] The purpose of the present invention is to provide an oil fume machine device to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solutions: An oil fume machine device includes a housing, an outer cover is fixedly surrounded around the housing, a touch screen is provided at the bottom of one side of the housing, a fan housing is fixedly installed inside the housing, a wind wheel is rotatably connected inside the fan housing, a plurality of water inlet pipes are fixedly installed at the top of the fan housing, the bottom of the water inlet pipe is close to the edge of the wind wheel, a heating plate is slidably connected inside the housing, a rotating shaft is rotatably connected to the center of the top of the fan housing, the wind wheel is fixedly connected to the rotating shaft, a first belt is sleeved outside the rotating shaft, a pair of counterweights are installed outside the first belt, one end of the first belt is connected to a second rotating rod, bearings are fixedly connected to both the upper and lower ends of the second rotating rod, and both bearings are fixed inside the housing. A pair of sliding blocks are fixedly connected to the top of the fan housing, a fixed rod is slidably connected to each sliding block, a plurality of first cleaning rods are fixedly installed at equal intervals on one of the fixed rods, and a plurality of second cleaning rods that are in staggered contact with the first cleaning rods are installed on the other fixed rod. The fixed rod rotates through the first belt and moves on the sliding block after contacting the counterweight, so that the first cleaning rod and the second cleaning rod intermittently contact the wind wheel.

[0006] Preferably, a pair of pallets are fixedly installed beside each sliding block on the fan housing, a second spring is fixedly connected to each pallet, and the other end of the second spring is fixedly connected to the fixed rod. The second spring is arranged near the edge of the fan housing.

[0007] Preferably, the fan housing is slidably connected to the heating plate. A separation cover is fixedly installed at the bottom of the fan housing, the separation cover is fan-shaped, and there is a gap between two adjacent fan blades. A baffle is rotatably installed beside the bottom of the heating plate close to the fan housing. The baffle has the same radius as the separation cover and is rotatably connected to the separation cover. A micro motor is fixedly connected to the bottom of the baffle.

[0008] Preferably, the fan housing is provided with hollow openings all around to form air vents. A receiving groove I is opened at the top inside the housing, and a receiving groove II is opened beside the receiving groove I at the top inside the housing. A plurality of first rotating rods are rotatably connected to the top edge of the fan housing. A turntable is fixedly installed at the top of each first rotating rod. A third belt is connected between the first rotating rod and the rotating shaft. A second belt is commonly sleeved outside a plurality of turntables. A plurality of positioning discs are fixedly installed on the fan housing at the position where the second belt is attached to the outer surface. Each first rotating rod passes through to the bottom of the air vent, and a rotating plate is fixedly installed on each first rotating rod.

[0009] Preferably, the width of the rotating plate is adapted to the width of the air vent. A connecting cavity is fixedly installed outside the fan housing, a discharge pipe is fixedly installed at the top of the connecting cavity, and the discharge pipe is connected to the ventilation system.

[0010] Preferably, a plurality of second magnets are annularly installed on the outer ring of each of the first rotating rods, and a plurality of groups of first magnets are arranged beside the plurality of first rotating rods at the top of the fan housing. The number of the first magnets and the second magnets is the same and their magnetic poles are opposite. A limiting plate is fixedly installed on one side of each air vent.

[0011] Preferably, both sides inside the housing extend towards the middle to form a pair of parallel sliding areas. The heating plate is attached to the other two sides inside the housing through the sliding areas. First springs are fixedly connected to the four peripheries of the top of the heating plate, and each first spring is fixedly connected to the adjacent sliding area.

[0012] Preferably, the periphery of the heating plate is designed in a surrounding manner, and water outlet holes are provided around it. A magnetic attraction plate is fixedly installed beside the bottom of the heating plate on the housing. A water distribution groove is provided at the edge of the magnetic attraction plate. A water accumulation groove is detachably installed at the bottom of the magnetic attraction plate, and a cover leak is fixedly installed in the middle of the bottom of the magnetic attraction plate.

[0013] Preferably, a sliding ring is slidably connected inside the sliding block. A sealing strip is fixedly installed at the bottom of the sliding ring. The fixed rod passes through the sliding ring and contacts the inner bottom of the housing, and the sealing strip is in sliding contact with the fan housing.

[0014] Preferably, the bottom of the connection cavity is fixedly connected to the magnetic attraction plate. The heating plate is slidably connected to the connection cavity. The bottom of the housing extends obliquely upward and is connected to the sliding area.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: During the rotation of the first belt of the present invention, after the counterweight contacts the fixed rod, a tendency for the fixed rod to move radially towards the fan housing is generated. Then, after the fixed rod moves, it drives the fixed rod to move on the sliding block. By arranging a pair of counterweights on the first belt, during the rotation of the first belt, the two fixed rods can drive the first cleaning rod or the second cleaning rod to contact the surface of the wind wheel at different times. When the wind wheel rotates, when the first cleaning rod and the second cleaning rod contact the surface of the wind wheel, the oil stains remaining on the surface of the wind wheel are scraped off. When the counterweight separates from the fixed rod, the second spring connected to the first cleaning rod and the second cleaning rod resets, causing the first cleaning rod and the second cleaning rod to rub against each other, enabling automatic cleaning between the first cleaning rod and the second cleaning rod, improving the cleanliness of the wind wheel surface, and enhancing the smoke exhaust effect of the equipment; In addition, under the action of the pulling force of the first spring, it rises, and the heating plate is flush with the sliding area. Some water will remain stored on its top, which is convenient for preheating the fan housing by generating high temperature inside the housing after the heating plate is heated in winter, preventing oil from accumulating in the pipeline during the normal use of the equipment. Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the sectional structural schematic diagram of the housing of the present invention; Figure 3 of the present invention Figure 2 is the enlarged structural schematic diagram of part A in the present invention; Figure 4 is the structural schematic diagram of the fan housing of the present invention; Figure 5 is the exploded structural schematic diagram of the wind wheel, separation cover and baffle of the present invention; Figure 6 is the structural schematic diagram of the cover leakage of the present invention; Figure 7 is the structural schematic diagram of the magnetic attraction plate of the present invention; Figure 8 of the present invention Figure 7 is the enlarged structural schematic diagram of part B in the present invention; Figure 9 is the structural schematic diagram of the first cleaning rod of the present invention; Figure 10 is the structural schematic diagram of the first magnet of the present invention; Figure 11 is the structural schematic diagram inside the sliding block of the present invention.

[0017] In the figure: 1 - housing; 101 - magnetic attraction plate; 102 - water diversion tank; 103 - water accumulation tank; 2 - outer cover; 3 - touch screen; 4 - discharge pipe; 5 - connection cavity; 6 - fan housing; 601 - rotating shaft; 602 - first belt; 603 - offset; 7 - rotating plate; 8 - heating plate; 9 - sliding area; 10 - first spring; 11 - receiving groove I; 12 - receiving groove II; 13 - water inlet pipe; 14 - first rotating rod; 15 - second belt; 16 - turntable; 17 - positioning disk; 18 - limiting plate; 19 - wind wheel; 20 - separation cover; 21 - baffle; 22 - micro motor; 23 - cover leakage; 24 - third belt; 25 - pallet; 26 - second spring; 27 - sliding block; 2701 - sliding ring; 2702 - sealing strip; 28 - fixing rod; 29 - second rotating rod; 30 - bearing; 31 - first cleaning rod; 32 - second cleaning rod; 33 - first magnet; 34 - second magnet. Detailed implementation manners

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-11, the present invention provides a technical solution: an oil fume machine device, including a housing 1, one side of the housing 1 can be fixed by expansion screws, so as to install the whole on the kitchen wall surface. An outer cover 2 is fixedly arranged around the housing 1. A touch screen 3 is arranged at the bottom of one side of the housing 1. A fan housing 6 is fixedly installed inside the housing 1. An impeller 19 is rotatably connected inside the fan housing 6. A plurality of water inlet pipes 13 are fixedly installed at the top of the fan housing 6. The bottom of the water inlet pipe 13 is close to the edge of the impeller 19. A heating plate 8 is slidably connected inside the housing 1. A rotating shaft 601 is rotatably connected to the center of the top of the fan housing 6. The impeller 19 is fixedly connected to the rotating shaft 601. A first belt 602 is sleeved outside the rotating shaft 601. A pair of counterweights 603 are installed outside the first belt 602. One end of the first belt 602 is connected to a second rotating rod 29. Bearings 30 are fixedly connected to both the upper and lower ends of the second rotating rod 29. Both of the two bearings 30 are fixed inside the housing 1. A pair of sliding blocks 27 are fixedly connected to the top of the fan housing 6. A fixing rod 28 is slidably connected to each of the sliding blocks 27. A plurality of first cleaning rods 31 are fixedly installed at equal intervals on one of the fixing rods 28. A plurality of second cleaning rods 32 which are in staggered contact with the first cleaning rods 31 are installed on the other fixing rod 28. The fixing rod 28 moves on the sliding block 27 after being in contact with the counterweight 603 through the rotation of the first belt 602, so that the first cleaning rod 31 and the second cleaning rod 32 intermittently contact the impeller 19. A pair of pallets 25 are fixedly installed beside each of the sliding blocks 27 on the fan housing 6. A second spring 26 is fixedly connected to each of the pallets 25. The other ends of the second springs 26 are all fixedly connected to the fixing rod 28. The second springs 26 are arranged near the edge of the fan housing 6. A receiving groove I 11 is opened at the top inside the housing 1. A receiving groove II 12 is opened at the top inside the housing 1 beside the receiving groove I 11.During the installation process, an AC motor for rotating the driving wind wheel 19 is installed inside the accommodation groove I11. Inside the accommodation groove II12, a pressure pump and a heater are placed. The heater is used to control the water temperature for use in winter. When the device is in normal use, the AC motor connected to the wind wheel 19 inside the housing 1 rotates, causing the wind wheel 19 to rotate when the AC motor rotates. When the AC motor rotates forward, the wind wheel 19 generates negative pressure to exhaust the cooking fumes inside the kitchen. After the device is used, it needs to be cleaned regularly to prevent the oil stains inside the pipeline from drying and getting stuck in the house exhaust pipeline and the device. During the cleaning process of the device, the mode is adjusted manually on the touch screen 3 to control the AC motor to rotate in reverse. When the AC motor rotates in reverse, the wind wheel 19 is in the state of discharging air downward, generating a downward thrust on the air inside the fan housing 6. At the same time, the pressure pump connected to the water inlet pipe 13 is opened, and water is drained from the water inlet pipe 13 to the top of the wind wheel 19. During the rotation of the wind wheel 19, it comes into contact with the cleaning liquid. The cleaning liquid on the surface of the wind wheel 19 is dispersed onto the inner wall of the fan housing 6 due to the centrifugal force of the wind wheel 19. During the rotation of the wind wheel 19, the wind wheel 19 and the fan housing 6 are cleaned simultaneously, improving the cleaning efficiency. And during the rotation of the wind wheel 19, the rotating shaft 601 drives the first belt 602 to rotate. When the first belt 602 rotates, after the counterweight 603 contacts the fixed rod 28, it generates a tendency for the fixed rod 28 to move radially towards the fan housing 6. Then, after the fixed rod 28 moves, it drives the fixed rod 28 to move on the sliding block 27. A pair of counterweights 603 are arranged on the first belt 602, which can make the two fixed rods 28 drive the first cleaning rod 31 or the second cleaning rod 32 to contact the surface of the wind wheel 19 at different times during the rotation of the first belt 602. The sides of the first cleaning rod 31 and the second cleaning rod 32 facing the wind wheel 19 can be set as anti-slip surfaces. When the wind wheel 19 rotates, when the first cleaning rod 31 and the second cleaning rod 32 contact the surface of the wind wheel 19, the oil stains remaining on the surface of the wind wheel 19 are scraped off. When the counterweight 603 separates from the fixed rod 28, the second spring 26 connected to the first cleaning rod 31 and the second cleaning rod 32 resets, causing the first cleaning rod 31 and the second cleaning rod 32 to rub against each other. Both the first cleaning rod 31 and the second cleaning rod 32 adopt a double-tube nested structure. During the process of the first cleaning rod 31 or the second cleaning rod 32 contacting the surface of the wind wheel 19, the outer surfaces of the first cleaning rod 31 and the second cleaning rod 32 can rotate when they come into contact, and after rotation, the first cleaning rod 31 and the second cleaning rod 32 can be automatically cleaned between them. When the cleaning efficiency of the surface of the wind wheel 19 is relatively high, the negative pressure effect generated by the wind wheel 19 will be enhanced, improving the smoke exhaust effect of the device.;

[0020] Further, the fan housing 6 and the heating plate 8 are slidably connected together. A separation cover 20 is fixedly installed at the bottom of the fan housing 6. The separation cover 20 is fan-shaped. There is a gap between two adjacent fan blades. A baffle 21 is rotatably installed near the bottom of the fan housing 6 on the heating plate 8. The baffle 21 has the same radius as the separation cover 20 and is rotatably connected to the separation cover 20. A micro motor 22 is fixedly connected to the bottom of the baffle 21. Wherein, the pressure pump inside the receiving groove II 12 introduces water source to the top of the fan housing 6. When the wind wheel 19 rotates in the reverse direction, the cleaning liquid discharged from the top of the fan housing 6 will flow to the bottom of the housing 1, and the cleaning liquid will flow along the housing 1 to the stove top and cannot be collected. Therefore, during the reverse rotation of the AC motor, the micro motor 22 is simultaneously turned on to rotate a certain angle, as shown in the appendix Figure 5 As shown, when the micro motor 22 rotates, the baffle 21 blocks the gap between two adjacent fan blades of the separation cover 20. The baffle 21 and the separation cover 20 are stacked on top of each other. The top of the baffle 21 and the separation cover 20 are used to hold the cleaning liquid to prevent liquid leakage.

[0021] Further, the periphery of the fan housing 6 is provided with hollow openings to form air vents. An accommodation groove I11 is formed at the top inside the housing 1, and an accommodation groove II12 is formed at the top inside the housing 1 near the accommodation groove I11. A plurality of first rotating rods 14 are rotatably connected to the top edge of the fan housing 6. A turntable 16 is fixedly installed at the top of each first rotating rod 14. A third belt 24 is connected between the first rotating rod 14 and the rotating shaft 601. A second belt 15 is commonly sleeved outside the plurality of turntables 16. A plurality of positioning disks 17 are fixedly installed on the top of the fan housing 6 in contact with the outer surface of the second belt 15. Each first rotating rod 14 penetrates to the bottom of the air vent, and a rotating plate 7 is fixedly installed on each first rotating rod 14; the width of the rotating plate 7 is adapted to the width of the air vent. A connection cavity 5 is fixedly installed outside the fan housing 6, and a discharge pipe 4 is fixedly installed at the top of the connection cavity 5. The discharge pipe 4 is connected to the ventilation system; a plurality of second magnets 34 are annularly installed on the outer circle of each first rotating rod 14. A plurality of groups of first magnets 33 are arranged beside the plurality of first rotating rods 14 at the top of the fan housing 6. The number of the first magnets 33 is the same as that of the second magnets 34 and their magnetic poles are opposite. The second magnets 34 and the first magnets 33 are in a soft attraction state. A limiting plate 18 is fixedly installed on one side of each air vent. When the AC motor rotates forward, the wind wheel 19 rotates and the heater is started. The wind wheel 19 drives the third belt 24 to rotate. The third belt 24 rotates to drive the plurality of first rotating rods 14 to rotate, so that the second belt 15 rotates on the plurality of turntables 16. When the first rotating rod 14 rotates forward, the first magnet 33 and the second magnet 34 are separated, and the rotating plate 7 and the air vent are in a closed state. The periphery of the fan housing 6 is in a sealed state, which does not affect the negative pressure generated during the rotation of the wind wheel 19. When the AC motor stops rotating, the first magnet 33 and the second magnet 34 are attracted again. In the cleaning mode of the device, the AC motor rotates reversely. After the first rotating rod 14 rotates reversely, it drives the side surface of the rotating plate 7 to contact the limiting plate 18, so that the first magnet 33 and the second magnet 34 are separated, and then the air vent is opened, allowing the cleaning liquid at the baffle 21 and the top of the separation cover 20 to be discharged onto the heating plate 8 to drain the inside of the fan housing 6, preventing oil stains from getting stuck inside the fan housing and improving the overall cleaning efficiency.

[0022] Further, on both sides inside the housing 1, they extend towards the middle to form a pair of parallel sliding areas 9. The heating plate 8 is attached to the other two sides inside the housing 1 through the sliding areas 9. Around the top of the heating plate 8, first springs 10 are fixedly connected. Each first spring 10 is fixedly connected to its adjacent sliding area 9. The heating plate 8 is designed in a surrounding manner and has water outlet holes on its four sides. The housing 1 is fixedly installed with a magnetic attraction plate 101 beside the bottom of the heating plate 8. A water diversion groove 102 is provided at the edge of the magnetic attraction plate 101. A water accumulation groove 103 is detachably installed at the bottom of the magnetic attraction plate 101. A cover leak 23 is fixedly installed in the middle at the bottom of the magnetic attraction plate 101. The bottom of the connection cavity 5 is fixedly connected to the magnetic attraction plate 101. The heating plate 8 is slidably connected to the connection cavity 5. The bottom of the housing 1 extends upwards obliquely and is connected to the sliding area 9. When the air vent is opened, the cleaning liquid is discharged onto the top of the heating plate 8. The heating plate 8 is forced to sink, and the first spring 10 is stretched. When the stressed edge of the heating plate 8 separates from the sliding area 9, the sewage on the heating plate 8 will flow along the four sides into the water diversion groove 102 of the magnetic attraction plate 101, and then flow along the water diversion groove 102 into the water accumulation groove 103. After the water accumulation groove 103 is full of water, it is poured out manually by the operator. After each discharge of water by the heating plate 8, due to the pulling force of the first spring 10, it rises. When the heating plate 8 is flush with the sliding area 9, some water remains stored on its top, which is convenient for the heating plate 8 to generate high temperature inside the housing in winter to preheat the fan housing 6, preventing oil from condensing in the pipeline during the normal use of the device.

[0023] A sliding ring 2701 is slidably connected inside the sliding block 27. A sealing strip 2702 is fixedly installed at the bottom of the sliding ring 2701. The fixed rod 28 passes through the sliding ring 2701 and contacts the inner bottom of the housing 1. The sealing strip 2702 is in sliding contact with the fan housing 6 and contacts the bottom of the sliding block 27. When the fixed rod 28 moves, it drives the sliding ring 2701 to slide together. At the same time, the sealing strip 2702 does not separate from the bottom of the sliding block 27, and the bottom of the sealing strip 2702 and the sealing strip 2702, thus preventing negative pressure from being generated when the wind wheel 19 rotates and discharging the oil fume into the housing 1.

Claims

1. A range hood device, comprising a housing (1) and an outer cover (2), wherein a touch screen (3) is provided at the bottom of one side of the housing (1), characterized in that: A fan casing (6) is fixedly installed inside the casing (1), a wind wheel (19) is rotatably connected inside the fan casing (6), a plurality of water inlet pipes (13) are fixedly installed on the top of the fan casing (6), the bottom of the water inlet pipe (13) is close to the edge of the wind wheel (19), a heating plate (8) is slidably connected inside the casing (1), a rotating shaft (601) is rotatably connected at the center of the top of the fan casing (6), the wind wheel (19) and the rotating shaft (601) are fixedly connected, a first belt (602) is sleeved on the outside of the rotating shaft (601), a pair of offset pins (603) are installed on the outside of the first belt (602), one end of the first belt (602) is connected to a second rotating rod (29), the upper and lower ends of the second rotating rod (29) are fixedly connected to bearings (30), and the two bearings (30) are fixed inside the casing (1); A pair of sliding blocks (27) are fixedly connected to the top of the fan housing (6), each of the sliding blocks (27) is slidably connected to a fixing rod (28), and a first cleaning rod (31) and a second cleaning rod (32) are mounted on the two fixing rods (28).

2. A range hood device according to claim 1, characterized in that: The fan housing (6) is fixedly mounted with a pair of pallets (25) near each of the sliding blocks (27); each of the pallets (25) is fixedly connected to a second spring (26); the other end of the second spring (26) is fixedly connected to a fixing rod (28); the second spring (26) is arranged near the edge of the fan housing (6); the fixing rod (28) is rotated by a first belt (602) and contacts the offset pin (603), and then moves on the sliding block (27), so that the first cleaning rod (31) and the second cleaning rod (32) intermittently contact the wind wheel (19).

3. A range hood device according to claim 2, characterized in that: The fan housing (6) is slidably connected to the heating plate (8); a separation cover (20) is fixedly mounted on the bottom of the fan housing (6); the separation cover (20) is arranged in a fan shape, with a gap between two adjacent fan blades; a baffle (21) is rotatably mounted on the heating plate (8) near the bottom of the fan housing (6); the baffle (21) and the separation cover (20) have the same radius and are rotatably connected to the separation cover (20); and a micro motor (22) is fixedly connected to the bottom of the baffle (21).

4. The range hood device according to claim 2, characterized in that: The fan housing (6) is hollowed out around to form an air vent. A receiving groove I (11) is provided at the top of the housing (1). A receiving groove II (12) is provided at the top of the housing (1) near the receiving groove I (11). A plurality of first rotating rods (14) are rotatably connected at the top edge of the fan housing (6). A rotating disk (16) is fixedly mounted on the top of each of the first rotating rods (14). A third belt (24) is connected between the first rotating rod (14) and the rotating shaft (601). A second belt (15) is commonly sleeved on the outside of the plurality of rotating disks (16). A plurality of contact plates (17) are fixedly mounted on the top of the fan housing (6) at a position contacting the outer surface of the second belt (15). Each of the first rotating rods (14) extends to the bottom of the air vent. A rotating plate (7) is fixedly mounted on each of the first rotating rods (14).

5. The range hood device according to claim 4, characterized in that: The width of the rotating plate (7) is adapted to the width of the air vent; a connecting chamber (5) is fixedly mounted on the outside of the fan housing (6); a discharge pipe (4) is fixedly mounted on the top of the connecting chamber (5); and the discharge pipe (4) is connected to a ventilation system.

6. The range hood device according to claim 4, characterized in that: A plurality of second magnets (34) are mounted in an annular shape on the outer ring of each of the first rotating rods (14); a plurality of groups of first magnets (33) are arranged on the top of the fan housing (6) beside the plurality of first rotating rods (14); the number of the first magnets (33) and the second magnets (34) are the same and their magnetic poles are opposite; and a limiting plate (18) is fixedly mounted on one side of each of the air vents.

7. The range hood device according to claim 5, characterized in that: The two sides of the shell (1) extend toward the middle to form a pair of parallel sliding areas (9), the heating plate (8) is fitted with the other two sides of the shell (1) through the sliding areas (9), and the top of the heating plate (8) is fixedly connected to first springs (10) all around, and each of the first springs (10) is fixedly connected to its adjacent sliding area (9).

8. The range hood device according to claim 7, characterized in that: The heating plate (8) is designed with enclosures on all sides and is provided with water outlet holes on all sides. A magnetic plate (101) is fixedly mounted on the shell (1) near the bottom of the heating plate (8). A water distribution groove (102) is provided at the edge of the magnetic plate (101). A water accumulation groove (103) is detachably mounted on the bottom of the magnetic plate (101). A cover drain (23) is fixedly mounted in the middle of the bottom of the magnetic plate (101).

9. The range hood device according to claim 1, characterized in that: The sliding block (27) is slidably connected to a sliding ring (2701) inside, a sealing strip (2702) is fixedly installed on the bottom of the sliding ring (2701), the fixing rod (28) passes through the sliding ring (2701) and contacts the bottom of the housing (1), and the sealing strip (2702) is in sliding contact with the fan housing (6).

10. The range hood device according to claim 7, characterized in that: The bottom of the connecting cavity (5) is fixedly connected to the magnetic attraction plate (101), the heating plate (8) is slidably connected to the connecting cavity (5), and the bottom of the shell (1) is tilted upward and connected to the sliding area (9).

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