A dual-duct range hood with automatic cleaning function

Abstract

The present invention relates to the technical field of range hoods, specifically a dual-duct range hood with an automatic cleaning function, comprising a range hood casing, wherein two independent exhaust passages are arranged in the casing at intervals along the horizontal direction, and further comprising: two oil scrapers, wherein the two oil scrapers are movably arranged in the two exhaust passages and fit with the front and rear inner walls of the exhaust passages; a reciprocating drive mechanism, wherein the reciprocating drive mechanism is arranged in the casing; two oil removal members, wherein the two oil removal members are respectively slidably arranged on the oil accumulation surfaces of the two oil scrapers, and are used to gather the oil on the oil accumulation surfaces of the oil scrapers into one place; and two flushing mechanisms, wherein the two flushing mechanisms are respectively fixedly arranged on the two oil removal members. The present invention can automatically clean the inside of the exhaust passage through the mutual cooperation between the oil scrapers, the reciprocating drive mechanism, the oil removal member and the flushing mechanism, without the need for frequent disassembly of the machine, thereby greatly reducing the burden on users.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and in particular to a dual-duct range hood with an automatic cleaning function. Background Art

[0002] Dual-duct range hoods feature two independent exhaust channels, one for each side. When the motor is turned on, the impellers in both ducts rotate simultaneously, generating a powerful suction force that draws fumes into the range hood and exhausts them through the two ducts. This design balances the air intake on both sides, achieving high airflow and low noise.

[0003] At present, the main components of a dual-duct range hood include: 1. The casing, which is the external structure of the range hood, usually made of metal or heat-resistant material, used to protect internal components and prevent oil smoke from leaking out; 2. The air duct, the dual-duct range hood has two independent air duct systems. The design of the air duct should ensure that the oil smoke can flow smoothly and reduce the possibility of backflow and leakage; 3. The fan, which is generally set at the top of the air duct, generates a strong suction force to draw the oil smoke into the range hood; 4. The filter, which is generally set at the bottom of the air duct, is used to filter large particles in the oil smoke to prevent it from entering the range hood or being discharged to the outside; 5. The oil cup, the bottom of the range hood is generally provided with an inclined oil guide plate, and the oil cup is located at the bottom of the oil guide plate, which is used to collect oil stains and oil droplets left after filtering by the filter.

[0004] When a dual-duct range hood is working, the inside of the air duct will be stained with oil. Existing dual-duct range hoods usually do not have an internal automatic cleaning function and can only be cleaned by disassembling the machine, which is cumbersome and time-consuming for non-professionals. Users can only ask professionals to clean the interior regularly, which puts a heavy burden on users. To this end, we propose a dual-duct range hood with an automatic cleaning function to effectively solve the above disadvantages. Summary of the Invention

[0005] The object of the present invention is to provide a dual-duct range hood with an automatic cleaning function, so as to solve the problems raised in the above-mentioned background technology.

[0006] The present invention is achieved through the following technical solutions: a dual-duct range hood with an automatic cleaning function, comprising a range hood casing, two independent exhaust ducts being arranged in the casing at intervals along the horizontal direction, and further comprising:

[0007] Two oil scrapers, the two oil scrapers are movably arranged in the two exhaust passages and fit against the front and rear inner walls of the exhaust passages;

[0008] A reciprocating drive mechanism, the reciprocating drive mechanism being disposed in the housing and configured to drive the two oil scraping members to move away from or toward each other;

[0009] Two oil removal members, the two oil removal members are respectively slidably arranged on the oil accumulation surfaces of the two oil scraping members, and are used to gather the oil on the oil accumulation surfaces of the oil scraping members into one place;

[0010] Two flushing mechanisms are respectively fixedly arranged on the two oil removal components, and the liquid inlet of each flushing mechanism is conductively connected to the external liquid supply unit.

[0011] Optionally, the oil scraper includes two oil scraping plates respectively attached to the front inner wall and the rear inner wall of the exhaust duct, and an oil baffle is fixedly connected to the side of the two oil scraping plates close to each other, and the oil scraping plates and the oil baffle cooperate to form an L-shaped structure, and a connecting arm is fixedly connected between the two oil baffles;

[0012] The reciprocating drive mechanism is in transmission connection with the connecting arm, and the oil removing member is in sliding connection with the oil scraper.

[0013] Optionally, the reciprocating drive mechanism includes a bidirectional screw that passes through the two exhaust channels in a horizontal direction and is spirally engaged with each connecting arm, and a servo motor that is transmission-connected to the bidirectional screw is fixedly installed in the casing.

[0014] Optionally, the oil removal component includes two oil removal blocks that slide on the oil accumulation surface of the scraper plate and are spaced apart up and down. An oil collecting groove is provided on the side of the two oil removal blocks that are close to each other, and a sewage pipe that is connected to the exhaust channel is fixedly connected to the side of the casing; when the two oil removal blocks move toward each other and fit together, the two oil collecting grooves cooperate to form a columnar groove that is connected to the sewage pipe, and an injection assembly that is adapted to the columnar groove is provided on the scraper plate, and the liquid inlet of the injection assembly is connected to the external liquid supply unit.

[0015] Optionally, a dovetail groove is provided on the oil accumulation surface of the scraper plate in the vertical direction, a dovetail slider that cooperates with the dovetail groove is fixedly connected to the oil removal block, and a guide groove that is connected to the dovetail groove is provided in the middle of the scraper plate, the outer contour of the guide groove is the same as the outer contour of the columnar groove, and the injection assembly is arranged in the guide groove.

[0016] Optionally, the injection assembly includes a flow channel vertically opened in the oil scraper, a liquid inlet at the lower end of the flow channel is conductively connected to an external liquid supply unit, and an injection port is opened on the oil scraper for connecting the flow channel to the oil collecting tank;

[0017] A sealing plate is movably inserted in the flow channel, and a connecting rope is fixedly connected to the upper end of the sealing plate. The end of the connecting rope away from the sealing plate moves vertically through the oil scraper plate and is fixedly connected to the oil removal block. A compression spring is sleeved on the connecting rope to always apply downward elastic force to the sealing plate.

[0018] An infusion groove is provided at the lower end of the sealing plate, and a plurality of injection holes communicated with the infusion groove are uniformly distributed on one side of the sealing plate close to the injection port.

[0019] Optionally, a rail groove corresponding to each oil removal block is opened on the inner wall of the exhaust channel, and a sliding rod is fixedly connected to the oil removal block and slides in the corresponding rail groove;

[0020] The rail groove consists of a transverse groove and an inclined groove, so that the oil removal block can perform intermittent up and down reciprocating motion along the oil accumulation surface of the oil scraper.

[0021] Optionally, the flushing mechanism includes a flushing pipe arranged between two oil removal blocks at the same height, a plurality of spraying parts are evenly distributed on each flushing pipe, and a liquid inlet of each flushing pipe is conductively connected to an external liquid supply unit.

[0022] Optionally, the spray cleaning component includes two oblique nozzles conductively connected to the flushing pipe, and a straight nozzle located between the two oblique nozzles is conductively connected to the flushing pipe.

[0023] Optionally, the angle between the oblique nozzle and the straight nozzle is 40°-50°.

[0024] Compared with the prior art, the present invention provides a dual-duct range hood with an automatic cleaning function, which has the following beneficial effects:

[0025] 1. The present invention provides an oil scraper and a reciprocating drive mechanism. When the interior of the dual-duct range hood needs to be cleaned, the reciprocating drive mechanism can drive the two oil scrapers to move away from each other, thereby scraping off the oil stains on the front and rear inner walls of the two exhaust ducts. No manual cleaning is required, saving time and effort.

[0026] 2. The present invention provides an oil removal component. When the two oil removal blocks in the oil removal component are close to each other, the oil accumulated on the surface of the scraper can be gathered in the oil collecting tank. When the two oil removal blocks are in contact with each other, the two oil collecting tanks can cooperate to form a columnar tank connected to the drain pipe. At this time, the gathered oil is concentrated in the columnar tank, and the oil in the columnar tank can be flushed into the drain pipe through the injection assembly and discharged. The scraped oil can be automatically processed, which is convenient for use.

[0027] 3. The present invention provides a flushing mechanism. Since the flushing mechanism can move synchronously with the oil removal component, the flushing mechanism can move left and right and up and down in the exhaust channel, so that the upper and lower inner walls and left and right inner walls of the exhaust channel can be fully flushed by the spray component, and the flushing effect is better.

[0028] 4. The present invention can automatically clean the inside of the exhaust duct through the mutual cooperation between the oil scraper, the reciprocating drive mechanism, the oil removal member and the flushing mechanism, without the need for frequent disassembly of the machine, thereby greatly reducing the burden on users. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a diagram of the initial state of the internal oil scraper of the dual-duct range hood of the present invention;

[0030] Figure 2 This is a state diagram of the oil scraper inside the dual-duct range hood of the present invention moving to the limit position;

[0031] Figure 3 This is a schematic diagram of the internal side structure of the dual-duct range hood of the present invention;

[0032] Figure 4 This is a schematic structural diagram of the oil scraper of the present invention;

[0033] Figure 5 This is a diagram showing the initial state of the oil removal block of the present invention;

[0034] Figure 6 This is a state diagram of the oil removal block of the present invention moving to the limit position;

[0035] Figure 7 for Figure 6 Enlarged schematic diagram of point A in the middle.

[0036] In the figure: 1. Casing; 2. Exhaust duct; 3. Oil scraper; 301. Oil scraper plate; 302. Oil baffle; 303. Connecting arm; 4. Reciprocating drive mechanism; 401. Bidirectional screw; 402. Servo motor; 5. Oil remover; 501. Oil remover block; 502. Oil collecting tank; 503. Drain pipe; 504. Injection assembly; 5041. Flow channel; 5042. Injection port; 5043. Closing plate; 5044. Connecting rope; 5045. Compression spring; 5046. Infusion tank; 5047. Injection hole; 505. Dovetail slide; 506. Dovetail slider; 507. Guide groove; 6. Rail groove; 7. Flushing mechanism; 701. Flushing pipe; 702. Spraying member; 8. Slide rod. DETAILED DESCRIPTION

[0037] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] See also Figures 1 to 7A dual-duct range hood with an automatic cleaning function includes a range hood casing 1, and two independent exhaust channels 2 are arranged at intervals in the horizontal direction inside the casing 1. A fan is provided at the top of each exhaust channel 2, and a filter is provided at the bottom of each exhaust channel 2. When the range hood is working, the oil smoke is first filtered through the filter, and then discharged through the exhaust channel 2 and the fan in sequence. The filtered oil stains and oil droplets flow into the oil cup along the inclined oil guide plate. This is the existing technology, and its specific structure and working principle will not be repeated here.

[0039] This embodiment further includes two oil scrapers 3, a reciprocating drive mechanism 4, two oil removal members 5 and two flushing mechanisms 7, wherein the two oil scrapers 3 are movably disposed in the two exhaust passages 2 and fit in with the front and rear inner walls of the exhaust passages 2. Specifically, Figure 4 As shown, the oil scraper 3 includes two oil scrapers 301 that respectively adhere to the front and rear inner walls of the exhaust duct 2. When the oil scrapers 301 move horizontally, they can scrape off oil accumulated on the front or rear inner wall of the exhaust duct 2. An oil baffle 302 is fixedly connected to the side of each of the two oil scrapers 301 that are adjacent to each other. The oil scrapers 301 and the oil baffles 302 form an L-shaped structure. The L-shaped structure prevents scraped oil from overflowing laterally. A connecting arm 303 is fixedly connected between the two oil baffles 302, giving the oil scraper 3 an overall H-shaped structure, enabling stable horizontal movement within the exhaust duct 2 and preventing rotation.

[0040] The reciprocating drive mechanism 4 is in transmission connection with the connecting arm 303 and is arranged in the housing 1 to drive the two oil scraping members 3 to move away from or closer to each other. Figure 1 and Figure 2 As shown, the reciprocating drive mechanism 4 includes a bidirectional screw 401 that extends horizontally through the two exhaust passages 2 and is helically engaged with each connecting arm 303. A servo motor 402, which is in transmission connection with the bidirectional screw 401, is fixedly mounted within the housing 1. When the servo motor 402 is in operation, it can drive the bidirectional screw 401 to rotate via a pulley transmission structure or a gear transmission structure. The two threaded sections on the bidirectional screw 401, which rotate in different directions, then drive the two connecting arms 303 to move toward and away from each other, thereby simultaneously cleaning the interiors of the two independent exhaust passages 2. Other reciprocating mechanisms can also be used, as long as they can cause the oil scraper 3 to move left and right within the exhaust passage 2. This is a prior art and will not be described in detail here.

[0041] In another embodiment of the present application, two bidirectional screws 401 are provided, and the two bidirectional screws 401 are symmetrically distributed front and back and are threadedly connected to the connecting arm 303. With this structure, the bidirectional screws 401 can be located on the front and back sides of the exhaust channel 2, avoiding the oil smoke gathering area in the middle of the exhaust channel 2, so that the surface of the bidirectional screws 401 is not easily contaminated with oil, ensuring that the structure can be used normally.

[0042] Specifically, the two oil removal members 5 are respectively slidably arranged on the oil accumulation surface of the two oil scraping members 3, and the oil accumulation surface is the side of the two oil scraping members 3 away from each other, and is used to gather the oil on the oil accumulation surface of the oil scraping members 3 into one place. Figure 4 As shown, the degreasing element 5 comprises two degreasing blocks 501 that slide on the oil-accumulating surface of the oil scraper 301, spaced apart from one another. An oil collecting trough 502 is defined on the adjacent side of each degreasing block 501 to collect the cleaned oil. A drain pipe 503, which is in communication with the exhaust duct 2, is fixedly connected to the side of the housing 1. When the two degreasing blocks 501 move toward each other until they are in contact, the two oil collecting troughs 502 cooperate to form a cylindrical groove that connects to the drain pipe 503. A spray assembly 504 is provided on the oil scraper 301, adapted to fit within the cylindrical groove. The spray assembly 504 sprays cleaning water, which discharges the collected oil through the drain pipe 503 for easy use. The liquid inlet of the spray assembly 504 is connected to an external liquid supply unit, through which cleaning water enters the spray assembly 504. In this embodiment, the cleaning water can be hot water or a liquid containing a degreasing detergent to ensure effective cleaning.

[0043] Further, such as Figure 5 As shown, a dovetail groove 505 is provided on the oil accumulation surface of the oil scraper 301 in the vertical direction, and a dovetail slider 506 is fixedly connected to the oil removal block 501 to cooperate with the dovetail groove 505. Through the cooperation between the dovetail groove 505 and the dovetail slider 506, the oil removal block 501 can only move up and down along the oil scraper 301 and cannot move laterally away from the oil scraper 301. Figure 4 As shown, a guide groove 507 is provided in the middle of the oil scraper 301, which is connected to the dovetail chute 505. Since the dovetail chute 505 is located on the oil accumulation surface of the oil scraper 301, oil will also enter the dovetail chute 505. When the dovetail slider 506 moves within the dovetail chute 505, it can push the oil in the dovetail chute 505 into the guide groove 507, facilitating cleaning. The outer contour of the guide groove 507 is the same as that of the columnar groove, and it can be aligned with the columnar groove. The injection assembly 504 is disposed within the guide groove 507, facilitating the flushing of oil in the guide groove 507 and the columnar groove into the drain pipe 503.

[0044] Furthermore, the injection assembly 504 includes a flow channel 5041 vertically defined within the oil scraper 301. The liquid inlet at the lower end of the flow channel 5041 is electrically connected to an external liquid supply unit. The oil scraper 301 is provided with an injection port 5042 for electrically connecting the flow channel 5041 to the oil collecting tank 502. A sealing plate 5043 is movably inserted within the flow channel 5041. A connecting rope 5044 is fixedly connected to the upper end of the sealing plate 5043. The end of the connecting rope 5044, distal from the sealing plate 5043, vertically traverses the oil scraper 301 and is fixedly connected to the degreasing block 501, allowing it to move with the degreasing block 501. A compression spring 5045 is sleeved on the connecting rope 5044 to exert a downward force on the sealing plate 5043. An infusion groove 5046 is provided at the lower end of the sealing plate 5043. Several injection holes 5047 are evenly distributed on one side of the sealing plate 5043, adjacent to the injection port 5042, and communicate with the infusion groove 5046. Normally, the sealing plate 5043 is held in a low position by the compression spring 5045. At this point, the injection holes 5047 are offset from the injection port 5042, preventing cleaning water from entering the injection port 5042 and preventing oil from clogging the injection holes 5047. When the oil removal block 501 moves to the guide groove 507 until it fits together with another oil removal block 501 to form a columnar groove, the sealing plate 5043 can be pulled upward by the connecting rope 5044 so that the injection hole 5047 is aligned with the injection port 5042. At this time, the cleaning water enters the flow channel 5041 through the external liquid supply unit, and then enters the injection hole 5047 through the infusion groove 5046, thereby flushing the oil and dirt gathered in the columnar groove to the drain pipe 503 through the injection hole 5047.

[0045] It should be noted that the specifications of the sealing plate 5043 are consistent with those of the flow channel 5041, that is, the side of the sealing plate 5043 is always in contact with the inner surface of the flow channel 5041, so that when the injection hole 5047 is misaligned with the injection port 5042, the liquid cannot leak from the injection port 5042.

[0046] Furthermore, the inner wall of the exhaust duct 2 is provided with a rail groove 6 corresponding to each degreasing block 501. Slide rods 8 are fixedly connected to the degreasing blocks 501 and slide within the corresponding rail groove 6. The rail groove 6 comprises a transverse groove and an inclined groove, allowing the degreasing blocks 501 to intermittently reciprocate up and down along the oil-accumulating surface of the oil scraper 301. Specifically, when the two oil scrapers 3 move away from each other, the slide rods 8 move within the transverse groove for a period of time, during which the degreasing blocks 501 are positioned at the ends of the oil scraper 301. After a period of time, when the slide rods 8 move into the inclined groove, the change in their trajectory causes the degreasing blocks 501 to move downward along the oil scraper 301, thereby collecting the oil scraped off by the oil scraper 301 in a single location. When the two oil scrapers 3 move toward each other, the slide bar 8 first moves in the inclined groove, causing the oil removal block 501 to move upward along the oil scraper plate 301. When the slide bar 8 moves into the horizontal groove, the oil removal block 501 is located at the end of the oil scraper plate 301 and moves horizontally with the oil scraper plate 301. This process is repeated to achieve intermittent up and down reciprocating motion of the oil removal block 501.

[0047] Finally, the two flushing mechanisms 7 are fixedly mounted on the two degreasing components 5, respectively, and the liquid inlet of each flushing mechanism 7 is electrically connected to the external liquid supply unit. Specifically, the flushing mechanism 7 includes a flushing pipe 701 disposed between two degreasing blocks 501 at the same height, and a plurality of spraying components 702 are evenly distributed on each flushing pipe 701. The liquid inlet of each flushing pipe 701 is electrically connected to the external liquid supply unit. The cleaning water enters the spraying components 702 through the flushing pipe 701, and then flushes the interior of the exhaust duct 2 through the spraying components 702. Furthermore, since the flushing pipe 701 can move synchronously with the degreasing block 501, it can fully flush the interior of the exhaust duct 2.

[0048] Furthermore, the spray cleaning component 702 includes two oblique nozzles electrically connected to the flushing pipe 701, to which a straight nozzle located between the two oblique nozzles is electrically connected. When the spray cleaning component 702 moves synchronously with the degreasing block 501, the straight nozzles can flush the top wall and fan of the exhaust duct 2, as well as the bottom wall and filter screen of the exhaust duct 2, and the oblique nozzles can flush the left and right inner walls of the exhaust duct 2. The wastewater generated by the flushing can flow along the inclined oil guide plate into the oil cup or pipe for discharge. Furthermore, the angle between the oblique nozzle and the straight nozzle is 40°-50°, which can effectively flush the upper and lower inner walls and the left and right inner walls of the exhaust duct 2.

[0049] In this embodiment, it should be noted that the external liquid supply unit includes a container located outside the range hood, containing cleaning water, such as hot water or a liquid containing a degreasing detergent. A water pump is disposed within the housing 1, connected to the container via a pipe. A liquid infusion tube, connected to the liquid inlet of the flow channel 5041, is fixedly connected to the oil baffle 302. The liquid inlet of the liquid infusion tube is connected to the water pump via a flexible hose, and the liquid inlet of the flushing tube 701 is connected to the liquid infusion tube via a flexible hose. When the water pump is operating, cleaning water can enter the flushing tube 701 or the flow channel 5041 via the liquid infusion tube, flexible hose, etc.

[0050] The working principle is as follows: In the initial state, the two oil scrapers 3 are close to each other and fit in with the inner wall of their respective exhaust channels 2. Figure 1 As shown, at this time, each oil removal block 501 is located at the end of the oil scraper 301. When the interior of the exhaust duct 2 needs to be cleaned, the servo motor 402 is activated, driving the bidirectional screw 401 to rotate through a gear transmission structure or a pulley transmission structure. The helical engagement between the bidirectional screw 401 and the connecting arm 303 drives the two oil scraping members 3 to move away from each other, and the oil scraper 301 then scrapes off the oil stains on the front and rear inner walls of the exhaust duct 2.

[0051] During this process, the degreasing block 501 follows the movement of the oil scraper 301, causing the slide bar 8 to move within the transverse groove. When the slide bar 8 moves into the inclined groove, the degreasing block 501 moves along the oil scraper 301 toward the guide groove 507, thereby scraping away the oil accumulated on the surface of the oil scraper 301. When the inclined groove reaches the limit position, the two degreasing blocks 501 abut against each other, causing the two oil collecting grooves 502 to form a cylindrical groove that aligns with the sewage pipe 503. As the two degreasing blocks 501 abut against each other, the connecting rope 5044 pulls the sealing plate 5043 upward, aligning the injection hole 5047 with the injection port 5042. Cleaning water enters the flow channel 5041 through the external liquid supply unit, and then enters the injection hole 5047 through the infusion groove 5046. The oil collected in the guide groove 507 and the cylindrical groove is sprayed into the sewage pipe 503 through the injection hole 5047, and then discharged through the sewage pipe 503.

[0052] During the above process, the flushing pipe 701 always moves synchronously with the oil removal block 501, so that the upper and lower inner walls and left and right inner walls of the exhaust channel 2 can be fully flushed through the straight nozzle and the inclined nozzle. The sewage generated by the flushing can flow into the oil cup or pipe along the inclined oil guide plate at the bottom of the range hood for discharge.

[0053] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0054] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dual-duct range hood with an automatic cleaning function, comprising a range hood housing (1), wherein two independent exhaust ducts (2) are arranged in the housing (1) at intervals along the horizontal direction, characterized in that: Also includes: Two oil scraping members (3), the two oil scraping members (3) are movably arranged in the two exhaust passages (2) and are in contact with the front and rear inner walls of the exhaust passages (2); A reciprocating drive mechanism (4), the reciprocating drive mechanism (4) being arranged in the housing (1) and being used to drive the two oil scraping members (3) to move away from or towards each other; Two oil removal members (5), the two oil removal members (5) being slidably arranged on the oil accumulation surfaces of the two oil scraping members (3) and used for gathering the oil on the oil accumulation surfaces of the oil scraping members (3) into one place; Two flushing mechanisms (7), the two flushing mechanisms (7) are respectively fixedly arranged on the two oil removal components (5), and the liquid inlet of each flushing mechanism (7) is conductively connected to the external liquid supply unit; The oil scraping member (3) comprises two oil scraping plates (301) respectively fitted with the front inner wall and the rear inner wall of the exhaust passage (2); The degreasing member (5) comprises two degreasing blocks (501) which slide on the oil accumulation surface of the oil scraper (301) and are spaced apart from each other. An oil collecting groove (502) is provided on the side of the two degreasing blocks (501) which are close to each other. A sewage pipe (503) which is in communication with the exhaust passage (2) is fixedly connected to the side of the housing (1). When the two degreasing blocks (501) move toward each other and fit together, the two oil collecting grooves (502) cooperate to form a columnar groove which is in communication with the sewage pipe (503). A spray assembly (504) which is adapted to the columnar groove is provided on the oil scraper (301). The liquid inlet of the spray assembly (504) is in communication with the external liquid supply unit. The flushing mechanism (7) comprises a flushing pipe (701) arranged between two oil removal blocks (501) at the same height; A dovetail chute (505) is provided on the oil accumulation surface of the oil scraper (301) in the vertical direction, a dovetail slider (506) is fixedly connected to the oil removal block (501) and matches the dovetail chute (505), a guide groove (507) is provided in the middle of the oil scraper (301) and is in communication with the dovetail chute (505), the outer contour of the guide groove (507) is the same as the outer contour of the columnar groove, and the injection assembly (504) is arranged in the guide groove (507); The injection assembly (504) comprises a flow channel (5041) vertically arranged in the oil scraper (301); a liquid inlet at the lower end of the flow channel (5041) is connected to an external liquid supply unit; and an injection port (5042) is provided on the oil scraper (301) for connecting the flow channel (5041) to the oil collecting tank (502). A sealing plate (5043) is movably inserted in the flow channel (5041), and a connecting rope (5044) is fixedly connected to the upper end of the sealing plate (5043). The end of the connecting rope (5044) away from the sealing plate (5043) moves vertically through the oil scraper (301) and is fixedly connected to the oil removal block (501). A compression spring (5045) is sleeved on the connecting rope (5044) to always apply downward elastic force to the sealing plate (5043). An infusion groove (5046) is provided at the lower end of the sealing plate (5043), and a plurality of injection holes (5047) are evenly distributed on one side of the sealing plate (5043) close to the injection port (5042) and communicated with the infusion groove (5046); When the oil removal block (501) moves toward the guide groove (507) until it fits with another oil removal block (501) to form a columnar groove, the sealing plate (5043) can be pulled upward by the connecting rope (5044) so ​​that the injection hole (5047) is aligned with the injection port (5042).

2. The dual-duct range hood with automatic cleaning function according to claim 1, characterized in that: An oil baffle (302) is fixedly connected to each other on one side of the two oil scrapers (301), and the oil scrapers (301) and the oil baffle (302) cooperate to form an L-shaped structure, and a connecting arm (303) is fixedly connected between the two oil baffles (302); The reciprocating drive mechanism (4) is in transmission connection with the connecting arm (303), and the oil removal member (5) is in sliding connection with the oil scraper (301).

3. The dual-duct range hood with automatic cleaning function according to claim 2, characterized in that: The reciprocating drive mechanism (4) comprises a bidirectional screw (401) that passes through the two exhaust passages (2) in a horizontal direction and is helically engaged with each connecting arm (303). A servo motor (402) that is transmission-connected to the bidirectional screw (401) is fixedly installed in the housing (1).

4. The dual-duct range hood with automatic cleaning function according to claim 1, characterized in that: The inner wall of the exhaust passage (2) is provided with a rail groove (6) corresponding to each degreasing block (501), and a sliding rod (8) is fixedly connected to the degreasing block (501) and slides in the corresponding rail groove (6); The rail groove (6) is composed of a transverse groove and an oblique groove, so that the oil removal block (501) can perform intermittent up and down reciprocating motion along the oil accumulation surface of the oil scraper (301).

5. The dual-duct range hood with automatic cleaning function according to claim 1, characterized in that: A plurality of spray cleaning components (702) are evenly distributed on each flushing pipe (701), and the liquid inlet of each flushing pipe (701) is conductively connected to an external liquid supply unit.

6. The dual-duct range hood with automatic cleaning function according to claim 5, characterized in that: The spray cleaning member (702) comprises two oblique spray heads which are conductively connected to the flushing pipe (701), and a straight spray head located between the two oblique spray heads is conductively connected to the flushing pipe (701).

7. The dual-duct range hood with automatic cleaning function according to claim 6, characterized in that: The angle between the oblique nozzle and the straight nozzle is 40°-50°.

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