Low cost self-cleaning range hood

Abstract

A low-cost self-cleaning range hood includes a casing, and an oil fume separation component, a self-cleaning oil scraping component, and a heating and airflow guiding component disposed within the casing. The oil fume separation component includes an upper clamping plate, a lower clamping plate, and multiple smoke-blocking strips. The multiple smoke-blocking strips are arranged horizontally, and their two ends are respectively clamped and fixed to the upper clamping plate and the lower clamping plate. Adjacent smoke-blocking strips are staggered to form a meandering oil fume channel. The self-cleaning oil scraping component includes an oil scraping plate and a driving mechanism. The oil scraping plate has fitting holes that fit the outer contour of the smoke-blocking strips. The driving mechanism drives the oil scraping plate to slide back and forth along the axial direction of the smoke-blocking strips to scrape off the oil stains adhering to the surface of the smoke-blocking strips. In this invention, the fitting holes fit tightly with the smoke-blocking strips, enabling thorough scraping of the entire surface of the smoke-blocking strips without dead angles, completely removing the attached oil stains and preventing oil residue accumulation. It realizes a complete self-cleaning process of "oil scraping-heating-oil drainage," eliminating the need for users to manually clean accumulated oil stains and improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and in particular to a low-cost self-cleaning range hood. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. The oil-fume separator, as the core component of the range hood, is typically designed with multiple layers of barriers to separate oil and fumes during cooking. It achieves this separation by repeatedly intercepting the oil-vapor mixture. Over time and with changes in cooking conditions, some grease will adhere to the barrier layers of the oil-fume separator. In this case, the user needs to manually remove the oil-fume separator for cleaning.

[0003] In the prior art, some manufacturers have designed self-cleaning range hoods, such as the self-cleaning range hood disclosed in patent CN202423207265.7. The cleaning mechanism consists of a screw driven by a motor on one side of the machine body, a drive block on the screw, a support frame, a connecting frame, and a scraper. This mechanism drives the scraper to move vertically, removing grease and debris from the filter cover, causing them to fall into the collection tank below.

[0004] However, existing oil fume separators typically consist of a two-layer mesh structure, with each layer integrally molded and equipped with filter holes or vertical smoke-blocking strips. This scraping cleaning method usually only works on a single side or between the two sides of the oil mesh; it has the following drawbacks: 1. The scraping process is difficult to completely remove the oil stains on the mesh filter holes or smoke baffle. Instead, it pushes the oil stains on one side of the scraper to areas that the scraper cannot cover. This causes the oil stains to still adhere to the oil mesh. After a long period of accumulation, the oil stains form large clumps of grease and debris, which are difficult for the scraper to remove effectively.

[0005] 2. The one-piece cast mesh structure has poor surface smoothness of the smoke baffle, which increases the oil scraping burden on the scraper and is not conducive to the movement of the scraper, further increasing the negative impact of oil stains adhering to the oil mesh.

[0006] 3. This type of self-cleaning structure requires a rigid crossbeam to support the cleaning scraper. The rigid crossbeam needs auxiliary guide wheels or guide rails, as well as multiple cooperating structures such as screws and drive motors. Furthermore, the rigid crossbeam also needs to consider how to avoid collisions with the filter screen, making the overall product structure complex and bulky. Summary of the Invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a low-cost self-cleaning range hood.

[0008] The technical solution adopted by one embodiment of the present invention to solve its technical problem is: a low-cost self-cleaning range hood, including a casing, and an oil fume separation component, a self-cleaning oil scraping component and a heating and guiding component disposed in the casing; The fume separation assembly includes an upper clamping plate, a lower clamping plate, and multiple smoke-blocking strips; the multiple smoke-blocking strips are arranged horizontally, and the two ends of the multiple smoke-blocking strips are respectively clamped and fixed to the upper clamping plate and the lower clamping plate; adjacent smoke-blocking strips are staggered to form a meandering fume channel; the front side of the chassis is provided with a smoke-cage front cover made of sheet metal; the smoke-cage front cover has a smoke-cage cavity that is concave towards the inside of the chassis; The self-cleaning oil-scraping assembly includes an oil-scraping blade and a driving mechanism; the oil-scraping blade has a fitting hole that fits into the outer contour of the smoke-blocking strip; when the upper or lower clamping plate is not installed, the oil-scraping blade is slidably fitted onto each of the smoke-blocking strips through the fitting hole; the driving mechanism is located at both ends of the oil fume separation assembly and is used to drive the oil-scraping blade to slide back and forth along the axial direction of the smoke-blocking strip to scrape off the oil stains attached to the surface of the smoke-blocking strip; The heating and guiding assembly includes an electric heating element, which is arranged close to the bottom of the oil fume separation assembly to heat the accumulated oil after scraping, so that the oil melts and is discharged.

[0009] Optionally, the upper and lower clamping plates are in the form of a "П"-shaped beam frame structure, each including a clamping plate body, a first clamping wall and a second clamping wall disposed on both sides of the clamping plate body; the first clamping wall is provided with a limiting hole that fits into the outer contour of the smoke baffle, and the end of the smoke baffle can pass through the limiting hole and abut against the second clamping wall; the lower edge of the lower clamping plate is provided with an oil drain hole.

[0010] Optionally, the oil fume separation assembly is further provided with connecting side beams at both ends in the lateral direction; the two connecting side beams and the upper and lower clamping plates form a frame structure; the upper and lower clamping plates can be locked and fixed with the connecting side beams.

[0011] Optionally, the driving mechanism is two sets of synchronously operating screw motor drive units; or, the driving mechanism is a single set of screw motor drive units and a guide and limit unit.

[0012] Optionally, the oil scraper is provided with drive connecting blocks on both sides for connecting the drive mechanism; the drive connecting blocks are threadedly connected to the screw of the screw motor drive unit.

[0013] Optionally, the smoke baffle is provided with a semi-circular, arc-shaped or S-shaped oil-blocking wall; the oil-blocking walls of two adjacent smoke baffles are opposite to each other and staggered to form an S-shaped oil fume channel.

[0014] Optionally, the scraper includes two support plates and an elastic scraper sandwiched between the two support plates; both the elastic scraper and the support plates are provided with the fitting holes; Alternatively, the scraper blade may be a single-layer scraper structure; the scraper blade may have an elastic nest embedded in the fitting hole.

[0015] Optionally, both the upper and lower clamping plates are integral sheet metal structures; the smoke baffle is made by extrusion molding or roll forming, and the surface is a smooth, low-friction surface.

[0016] Optionally, the bottom surface of the smoke-collecting cavity is a flat mounting plate wall, with an oil fume opening for installing the oil fume separation component; the upper clamping plate, the lower clamping plate, and the driving mechanism are fixed to the mounting plate wall.

[0017] Optionally, the mounting plate wall is integrally stamped to form a limiting guide block; the limiting guide block is located at both ends of the lateral side of the fume outlet; the driving mechanism is provided with a linear guide rail; at least two limiting guide blocks are provided for sliding and limiting the linear guide rail; The electric heating element is elongated and extends along the length of the lower clamping plate, and is arranged close to the main body of the clamping plate.

[0018] The beneficial effects of this invention are: 1. Addressing the pain point of incomplete cleaning of existing self-cleaning oil filters: The scraper blade has fitting holes that fit the outer contour of the smoke baffle strips, allowing it to slide onto each smoke baffle strip. When the drive mechanism drives the scraper blade to slide back and forth along the axial direction of the smoke baffle strips, the fitting holes fit tightly against the smoke baffle strips, enabling thorough scraping of the entire surface of the smoke baffle strips without dead angles, completely removing the attached oil stains and preventing the accumulation of oil residue. At the same time, the staggered arrangement of adjacent smoke baffle strips forms a meandering oil fume channel, which not only ensures the efficiency of oil fume separation but also avoids the problem of dirt and grime easily accumulating in the filter holes of traditional mesh plates, further improving the thoroughness of cleaning.

[0019] 2. Simplified structure and reduced manufacturing costs: The cumbersome rigid support structure is eliminated. The smoke baffle is fixed by the upper and lower clamping plates, which directly provides a stable sliding support for the oil scraper. The drive mechanism only needs to be set at both ends of the oil fume separation component to drive the oil scraper. There is no need to set up additional support beams and avoidance structures. The number of parts is greatly reduced, the assembly process is simplified, the production and manufacturing costs are effectively reduced, the probability of equipment failure is reduced, and the product reliability is improved.

[0020] 3. Ensure smooth oil discharge and avoid blockage: The electric heating element is located near the bottom of the oil fume separation component, which can heat the oil accumulated after scraping, melt and liquefy the viscous oil, greatly reduce the flow resistance of the oil, ensure smooth oil discharge, and realize a complete self-cleaning process of "scraping oil-heating-draining oil". There is no need for users to manually clean the accumulated oil, improving the user experience.

[0021] 4. The smoke-collecting cavity can effectively gather the oil fumes generated during cooking, prevent the oil fumes from spreading, and ensure that all the oil fumes can enter the smoke inlet and flow through the oil fume separation component, thereby improving the oil fume separation efficiency. At the same time, the smoke-collecting front cover is made of sheet metal in one piece, with a smooth structure that is not easy to adhere to oil stains and is easy to clean.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the oil fume filtration structure of the present invention. Figure 2 for Figure 1 Another schematic diagram of the oil fume filtration structure; Figure 3 for Figure 1 Exploded view of the oil fume filtration structure; Figure 4 for Figure 1 Longitudinal sectional view of the oil fume filtration structure; Figure 5 for Figure 1 A cross-sectional view of the oil fume filtration structure; Figure 6 This is a schematic diagram of a range hood using the oil fume filtration structure of the present invention.

[0024] Explanation of key component symbols: 10. Chassis; 11. Smoke-collecting front cover; 12. Smoke-collecting cavity; 13. Mounting plate wall; 131. Limiting guide block; 20. Oil-fume separation assembly; 21. Upper clamping plate; 22. Lower clamping plate; 23. Smoke-blocking strip; 24. Oil-fume channel; 25. Clamping plate body; 251. First clamping wall; 252. Second clamping wall; 253. Limiting hole; 26. Connecting side beam; 30. Self-cleaning oil scraping assembly; 31. Oil scraper; 311. Fitting hole; 312. Supporting clamping plate; 313. Elastic scraper; 32. Drive mechanism; 33. Drive connecting block; 40. Heating guide assembly; 41. Electric heating element. Detailed Implementation

[0025] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0026] In the description of this invention, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0028] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0029] Example Reference Figures 1 to 6 The present invention proposes a low-cost self-cleaning range hood, including a housing 10, and an oil fume separation component 20, a self-cleaning oil scraping component 30 and a heating and guiding component 40 disposed in the housing 10; The fume separation assembly 20 includes an upper clamping plate 21, a lower clamping plate 22, and multiple smoke-blocking strips 23; the multiple smoke-blocking strips 23 are arranged in a horizontal direction, and the two ends of the multiple smoke-blocking strips 23 are respectively clamped and fixed to the upper clamping plate 21 and the lower clamping plate 22; adjacent smoke-blocking strips 23 are staggered to form a meandering fume channel 24. The self-cleaning oil scraping assembly 30 includes an oil scraper 31 and a drive mechanism 32. The oil scraper 31 has a fitting hole 311 that fits into the outer contour of the smoke baffle 23. When the upper clamping plate 21 or the lower clamping plate 22 is not installed, the oil scraper 31 can be slidably sleeved on each smoke baffle 23 through the fitting hole 311. The drive mechanism 32 is located at both ends of the oil fume separation assembly 20 and is used to drive the oil scraper 31 to slide back and forth along the axial direction of the smoke baffle 23 to scrape off the oil stains attached to the surface of the smoke baffle 23. The heating and diversion assembly 40 includes an electric heating element 41, which is arranged near the bottom of the oil fume separation assembly 20 and is used to heat the oil sludge accumulated after scraping so that the oil sludge melts and is discharged.

[0030] The beneficial effects of this invention are: 1. Addressing the pain point of incomplete cleaning of existing self-cleaning oil filters: The scraper plate 31 has fitting holes 311 that fit the outer contour of the smoke baffle 23, and can be slidably sleeved on each smoke baffle 23. When the drive mechanism 32 drives the scraper plate 31 to slide back and forth along the axial direction of the smoke baffle 23, the fitting holes 311 fit tightly with the smoke baffle 23, which can scrape the entire surface of the smoke baffle 23 without dead angles, thoroughly remove the attached oil stains, and avoid the accumulation of oil stains. At the same time, the staggered arrangement of adjacent smoke baffles 23 forms a meandering oil fume channel 24, which not only ensures the efficiency of oil fume separation, but also avoids the problem of dirt and grime easily accumulating in the filter holes of traditional mesh plates, further improving the thoroughness of cleaning.

[0031] 2. Simplified structure and reduced manufacturing costs: The cumbersome rigid support structure is eliminated. The smoke baffle 23 is fixed by the upper clamping plate 21 and the lower clamping plate 22, which directly provides a stable sliding support for the oil scraper 31. The drive mechanism 32 only needs to be set at both ends of the oil fume separation component 20 to drive the oil scraper 31 to run. There is no need to set up additional support beams and avoidance structures. The number of parts is greatly reduced, the assembly process is simplified, the production and manufacturing costs are effectively reduced, the probability of equipment failure is reduced, and the product reliability is improved.

[0032] 3. Ensure smooth oil discharge and avoid blockage: The electric heating element 41 is arranged near the bottom of the oil fume separation component 20, which can heat the oil accumulated after scraping, melt and liquefy the viscous oil, greatly reduce the oil flow resistance, ensure smooth oil discharge, and realize the complete self-cleaning process of "scraping oil-heating-draining oil". There is no need for users to manually clean the accumulated oil, improving the user experience.

[0033] 4. The smoke-collecting cavity 12 can effectively gather the oil fumes generated during cooking, prevent the oil fumes from spreading, and ensure that all the oil fumes can enter the smoke-collecting port and flow through the oil-fume separation component 20, thereby improving the oil-fume separation efficiency. At the same time, the smoke-collecting front cover 11 is made of sheet metal in one piece, with a smooth structure that is not easy to adhere to oil stains and is easy to clean.

[0034] In this embodiment, the upper clamping plate 21 and the lower clamping plate 22 are "П"-shaped beam frame structures, each including a clamping plate body 25, a first clamping wall 251 and a second clamping wall 252 disposed on both sides of the clamping plate body 25; the first clamping wall 251 is provided with a limiting hole 253 that fits the outer contour of the smoke baffle 23, and the end of the smoke baffle 23 can pass through the limiting hole 253 and abut against the second clamping wall 252; the lower clamping plate 22 has an oil drain hole at its lower edge. This structure eliminates the need for complex fixing connectors. The smoke-blocking strips 23 can be quickly positioned and clamped using only the clamping walls and limiting holes 253 of the clamping plates. During assembly, all smoke-blocking strips 23 can be passed through the limiting holes 253 of the first clamping wall 251 and pressed against the second clamping wall 252 before the upper clamping plate 21 and lower clamping plate 22 are fixed. The limiting holes 253 fit snugly against the outer contour of the smoke-blocking strips 23, ensuring precise positioning and preventing displacement or shaking during installation and use. This ensures uniform and flat arrangement of multiple smoke-blocking strips 23, reduces assembly errors, and guarantees product consistency. Compared to flat clamping plates, the "П"-shaped beam frame structure has stronger structural rigidity and load-bearing capacity, effectively supporting the weight of the smoke-blocking strips 23 and the friction of the sliding oil scraper 31, preventing clamping plate deformation.

[0035] Specifically, the oil fume separation component 20 is provided with connecting side beams 26 at both ends of its horizontal direction; the two connecting side beams 26, the upper clamping plate 21, and the lower clamping plate 22 form a frame structure; the upper clamping plate 21 and the lower clamping plate 22 can be locked and fixed with the connecting side beams 26. The frame structure can form the upper clamping plate 21, the lower clamping plate 22, and the connecting side beams 26 into a whole, distributing the force and preventing the upper clamping plate 21 and the lower clamping plate 22 from deforming due to uneven force. At the same time, it prevents the smoke baffle strip 23 from loosening or shifting, ensuring the structural stability of the self-cleaning oil screen during long-term use, especially under the friction generated by the reciprocating sliding of the oil scraper 31, it can still maintain good structural integrity. The upper clamping plate 21, the lower clamping plate 22 and the connecting side beam 26 are fixed by locking, which can be quickly disassembled and installed. When it is necessary to maintain or replace the oil scraper 31 and the smoke baffle 23, simply loosen the locking structure to separate the components. The operation is convenient and reduces maintenance costs. At the same time, the frame structure also makes it easy to assemble and fix the entire oil fume separation component 20 with the casing 10.

[0036] In this embodiment, the drive mechanism 32 consists of two sets of synchronously operating screw motor drive units; alternatively, the drive mechanism 32 consists of a single set of screw motor drive units and a guide and limiting unit. The two sets of synchronously operating screw motor drive units drive both ends of the scraper blade 31 respectively, ensuring that the scraper blade 31 moves at a uniform speed along the axial direction of the smoke baffle 23, preventing tilting or jamming of the scraper blade 31, ensuring a tight fit between the scraper blade 31 and the smoke baffle 23, and improving the scraping effect. The single set of screw motor drive units, combined with the guide and limiting unit, precisely limits the movement direction of the scraper blade 31, also achieving smooth operation of the scraper blade 31, and with a simpler structure. The screw motor drive unit features high transmission efficiency, large torque, and low noise, effectively driving the scraper blade 31 to slide back and forth with low energy consumption; simultaneously, the high precision of the screw drive allows for precise control of the sliding stroke of the scraper blade 31, avoiding excessive sliding and causing component wear, thus extending its service life.

[0037] In this embodiment, drive connecting blocks 33 for connecting the drive mechanism 32 are provided on both sides of the scraper 31; the drive connecting blocks 33 are threadedly connected to the screw of the screw motor drive unit. The drive connecting blocks 33 are provided on both sides of the scraper 31 and are correspondingly connected to the screw, which can make the scraper 31 bear force evenly at both ends, avoid the scraper 31 from tilting or deforming during sliding, ensure the fit between the scraper 31 and the smoke baffle 23, and improve the scraping effect; at the same time, the threaded connection structure is reliable and can withstand the friction generated during the scraping process, and is not easy to loosen or fall off, ensuring the stable operation of the drive mechanism 32.

[0038] In this embodiment, the smoke baffle 23 is provided with a semi-circular, arc-shaped, or S-shaped oil-blocking wall; the oil-blocking walls of two adjacent smoke baffles 23 are arranged opposite to each other and staggered to form an S-shaped fume channel 24. The S-shaped fume channel 24 can extend the flow path of the fumes, allowing the fumes to meander and collide multiple times within the channel. The grease components in the fumes can fully adhere to the oil-blocking wall of the smoke baffle 23, achieving efficient gas-liquid separation. Compared with traditional straight channels or simple bend channels, the separation efficiency is significantly improved, reducing the amount of fumes discharged outdoors and purifying the kitchen environment.

[0039] In this embodiment, the scraper 31 includes two supporting clamps 312 and an elastic scraper 313 sandwiched between the two supporting clamps 312; both the elastic scraper 313 and the supporting clamps 312 are provided with fitting holes 311; or, the scraper 31 is a single-layer scraper structure; the scraper 31 has an elastic nest embedded in the fitting hole 311. The elastic scraper 313 or the elastic nest has good elasticity and can fit tightly against the oil-blocking wall of the smoke-blocking strip 23. Even if there are slight protrusions or errors on the surface of the smoke-blocking strip 23, the elastic structure can adapt to fit, avoiding cleaning gaps and thoroughly scraping off the attached oil stains; at the same time, the elastic structure has a certain degree of wear resistance and toughness, and can withstand the wear caused by long-term scraping, extending the service life of the scraper 31. Two scraper blade structures 31 can be flexibly selected. The structure of "supporting clamp 312 clamping elastic scraper 313" has stronger stability and is suitable for long-term high-frequency use scenarios. The structure of "single-layer scraper embedded with elastic nest" is simpler. The elastic nest can be replaced separately after wear, without replacing the entire scraper blade 31, reducing maintenance costs and improving the product's economy.

[0040] In this embodiment, both the upper clamping plate 21 and the lower clamping plate 22 are integral sheet metal structures; the smoke baffle 23 is manufactured using extrusion molding or roll forming processes, and its surface is a smooth, low-friction surface. The integral sheet metal molding process is mature and highly efficient, enabling mass production of the upper clamping plate 21 and the lower clamping plate 22 without complex splicing or welding processes, significantly reducing processing costs. The smoke baffle 23, manufactured using extrusion molding or roll forming processes, allows for continuous production with high efficiency and high raw material utilization, further controlling costs. The integrally molded upper clamping plate 21 and lower clamping plate 22 have strong overall structural integrity, good rigidity, and are not easily deformed or damaged, capable of withstanding the friction generated by the sliding of the scraper plate 31 and the weight of the smoke baffle 23 for a long time. The extruded or roll-formed smoke baffle 23 has a uniform structure and high strength, capable of withstanding oil fume impact and scraping friction, extending its service life. The surface of the smoke baffle 23 is smoothed to form a low-friction surface, which can significantly reduce the frictional resistance when the oil scraper 31 slides, ensuring the smooth operation of the oil scraper 31. At the same time, it reduces the adhesion of oil stains on the surface of the smoke baffle 23, making it easier for the oil scraper 31 to thoroughly scrape off the oil stains and further improve the self-cleaning effect. In addition, the smooth surface also facilitates the flow of oil stains and reduces accumulation.

[0041] In this embodiment, a smoke-collecting front cover 11, integrally formed from sheet metal, is provided on the front side of the chassis 10. The smoke-collecting front cover 11 has a smoke-collecting cavity 12 recessed towards the chassis 10. The bottom surface of the smoke-collecting cavity 12 is a flat mounting plate wall 13, with an oil fume opening for mounting the oil fume separation component 20. The upper clamping plate 21, the lower clamping plate 22, and the drive mechanism 32 are fixed to the mounting plate wall 13. The smoke-collecting cavity 12 can effectively gather the oil fumes generated during cooking, prevent the oil fumes from spreading, and ensure that all the oil fumes can enter the oil fume opening and flow through the oil fume separation component 20, thereby improving the oil fume separation efficiency. At the same time, the smoke-collecting front cover 11 is integrally formed from sheet metal, with a smooth structure, making it less prone to oil stains and easy to clean. The flat mounting plate 13 provides a stable mounting base for the upper clamping plate 21, lower clamping plate 22, and drive mechanism 32, ensuring high flatness of the oil fume separation component 20 after installation and uniform arrangement of the smoke baffle 23. This, in turn, ensures smooth sliding of the oil scraper 31, avoiding problems such as oil scraping jamming and incomplete cleaning caused by installation tilt. Directly fixing the upper clamping plate 21, lower clamping plate 22, and drive mechanism 32 to the mounting plate 13 eliminates the need for additional mounting brackets, simplifying the assembly structure, improving the integration of the self-cleaning oil filter and the casing 10, making the overall structure of the range hood more compact, and reducing assembly difficulty and manufacturing costs.

[0042] In this embodiment, the mounting plate wall 13 is integrally stamped to form a limiting guide block 131; the limiting guide block 131 is located at both ends of the lateral direction of the fume outlet; the drive mechanism 32 is provided with a linear guide rail; at least two limiting guide blocks 131 are provided for sliding and limiting the linear guide rail; the limiting guide block 131 is integrally stamped, has good structural rigidity and accurate positioning, and can slide and limit the linear guide rail of the drive mechanism 32 to ensure that the linear guide rail moves in a fixed direction, thereby ensuring that the oil scraper 31 slides smoothly when it reciprocates.

[0043] Furthermore, the electric heating element 41 is elongated and extends along the length of the lower clamping plate 22, positioned close to the main body 25 of the clamping plate 22. The elongated shape of the electric heating element 41, its continuous arrangement along the length of the lower clamping plate 22, and its proximity to the main body of the lower clamping plate 22, enables uniform heating of the bottom of the oil fume separation assembly 20, ensuring that all accumulated oil is melted and liquefied, preventing oil solidification and blockage caused by uneven local heating. Simultaneously, its proximity to the main body of the lower clamping plate 22 improves heat transfer efficiency, reduces heat loss, and saves energy.

[0044] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A low-cost self-cleaning range hood, characterized in that, Includes a chassis (10), and an oil fume separation assembly (20), a self-cleaning oil scraping assembly (30), and a heating and air guiding assembly (40) disposed in the chassis (10); The fume separation assembly (20) includes an upper clamping plate (21), a lower clamping plate (22), and multiple smoke-blocking strips (23); the multiple smoke-blocking strips (23) are arranged horizontally, and the two ends of the multiple smoke-blocking strips (23) are respectively clamped and fixed to the upper clamping plate (21) and the lower clamping plate (22); adjacent smoke-blocking strips (23) are staggered to form a meandering fume channel (24); the front side of the chassis (10) is provided with a smoke-cage front cover (11) formed by sheet metal; the smoke-cage front cover (11) is provided with a smoke-cage cavity (12) that is recessed into the chassis (10); The self-cleaning oil scraping assembly (30) includes an oil scraper (31) and a drive mechanism (32); the oil scraper (31) has a fitting hole (311) that fits the outer contour of the smoke baffle (23); when the upper clamp (21) or lower clamp (22) is not installed, the oil scraper (31) is slidably sleeved on each of the smoke baffles (23) through the fitting hole (311); the drive mechanism (32) is located at both ends of the oil fume separation assembly (20) and is used to drive the oil scraper (31) to slide back and forth along the axial direction of the smoke baffle (23) to scrape off the oil stains attached to the surface of the smoke baffle (23); The heating and diversion assembly (40) includes an electric heating element (41), which is arranged close to the bottom of the oil fume separation assembly (20) to heat the oil sludge accumulated after scraping so that the oil sludge melts and is discharged.

2. The low-cost self-cleaning range hood according to claim 1, characterized in that: The upper clamping plate (21) and the lower clamping plate (22) are "П"-shaped beam frame structures, each including a clamping plate body (25), a first clamping wall (251) and a second clamping wall (252) disposed on both sides of the clamping plate body (25); the first clamping wall (251) is provided with a limiting hole (253) that fits the outer contour of the smoke baffle (23), and the end of the smoke baffle (23) can pass through the limiting hole (253) and abut against the second clamping wall (252); the lower clamping plate (22) has an oil drain hole at its lower edge.

3. The low-cost self-cleaning range hood according to claim 2, characterized in that: The oil fume separation component (20) is also provided with connecting side beams (26) at both ends in the horizontal direction; the two connecting side beams (26) and the upper clamping plate (21) and the lower clamping plate (22) form a frame structure; the upper clamping plate (21) and the lower clamping plate (22) can be locked and fixed with the connecting side beams (26).

4. The low-cost self-cleaning range hood according to claim 2, characterized in that: The drive mechanism (32) is two sets of synchronously operating screw motor drive units; or, the drive mechanism (32) is a single set of screw motor drive units and a guide and limit unit.

5. The low-cost self-cleaning range hood according to claim 4, characterized in that: The oil scraper (31) has drive connecting blocks (33) on both sides for connecting the drive mechanism (32); the drive connecting blocks (33) are threadedly connected to the screw of the screw motor drive unit.

6. The low-cost self-cleaning range hood according to claim 1, characterized in that: The smoke baffle (23) is provided with a semi-circular, arc-shaped or S-shaped oil baffle wall; the oil baffle walls of two adjacent smoke baffles (23) are opposite and staggered to form an S-shaped oil fume channel (24).

7. The low-cost self-cleaning range hood according to claim 1, characterized in that: The oil scraper (31) includes two support plates (312) and an elastic scraper (313) sandwiched between the two support plates (312); both the elastic scraper (313) and the support plates (312) are provided with the fitting hole (311); Alternatively, the scraper (31) is a single-layer scraper structure; the scraper (31) is fitted with an elastic nest at the fitting hole (311).

8. The low-cost self-cleaning range hood according to claim 1, characterized in that: The upper clamping plate (21) and the lower clamping plate (22) are both integral sheet metal structures; the smoke baffle strip (23) is made by extrusion molding or roll forming process, and the surface is a smooth, low-friction surface.

9. The low-cost self-cleaning range hood according to claim 1, characterized in that: The bottom surface of the smoke-collecting cavity (12) is a flat mounting plate wall (13), and an oil fume port is provided for installing the oil fume separation component (20); the upper clamping plate (21), the lower clamping plate (22) and the driving mechanism (32) are fixed to the mounting plate wall (13).

10. The low-cost self-cleaning range hood according to claim 9, characterized in that: The mounting plate wall (13) is integrally stamped to form a limiting guide block (131); the limiting guide block (131) is located at both ends of the lateral direction of the fume outlet; the driving mechanism (32) is provided with a linear guide rail; at least two limiting guide blocks (131) are provided for sliding and limiting the linear guide rail; The electric heating element (41) is long and extends along the length of the lower clamping plate (22) and is arranged close to the clamping plate body (25) of the lower clamping plate (22).

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