An air outlet cover, a fan system and an oil fume treatment device

Abstract

The utility model relates to kitchen appliance technical field especially, it relates to an air outlet cover, fan system and oil fume treatment device. The utility model provides an air outlet cover including cover body, heating mechanism and drive assembly, wherein, cover body is annular and has fluid export, heating mechanism is used for heating the oil dirt on cover body, drive assembly is used for driving the deformation of cover body, and the carbonized material can be made to fall off after the deformation of cover body, and the material that falls off is blown to the outdoor pipeline through the air blowing of fan system, thereby can realize the cleaning of oil dirt on the air outlet cover, avoid the caliber of air outlet cover to be small, avoid the reduction of air outlet cover caliber, ensure that oil fume treatment device always better exhaust capacity and ensure that oil fume treatment device always better oil fume suction effect.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to an exhaust hood, a fan system, and an oil fume treatment device. Background Technology

[0002] A range hood includes a fan system, which typically consists of a fan and an exhaust hood. The exhaust hood is located at the air outlet of the fan. Because the exhaust hood passes through a lot of oil fumes, a lot of grease and grime will condense and dry on it over time, causing the diameter of the exhaust hood to become smaller. This affects the exhaust volume of the range hood and reduces its oil fume extraction efficiency.

[0003] Therefore, there is an urgent need to design a new exhaust hood, fan system, and fume treatment device to solve the problems of smaller exhaust hood diameter, reduced exhaust volume of range hood, and reduced fume extraction efficiency of range hood. Utility Model Content

[0004] One objective of this utility model is to provide an exhaust hood that avoids reducing the diameter of the exhaust hood, ensures that the fume treatment device always has a good exhaust volume, and ensures that the fume treatment device always has a good fume extraction effect.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An air vent cover, comprising:

[0007] The enclosure is annular and has a fluid outlet.

[0008] A heating mechanism is configured to heat the oil stains on the cover; and

[0009] A driving component is configured to drive the deformation of the cover.

[0010] As an optional solution, the heating mechanism includes:

[0011] A heating layer is attached to the inner circumference of the cover, attached to the outer circumference of the cover, and / or embedded in the interior of the cover.

[0012] As an alternative, one of the heating mechanism and the drive assembly is located inside the cover, and the other is located outside the cover.

[0013] As an optional solution, the air outlet shroud further includes:

[0014] The first heat insulation layer is attached to the outer peripheral surface of the cover and extends from the inside of the cover to the outside of the cover. The heating mechanism, the cover, the first heat insulation layer and the driving assembly are arranged in sequence.

[0015] As an optional solution, the driving component includes:

[0016] At least two drive mechanisms are distributed along the circumference of the cover, and each drive mechanism can drive a portion of the cover to deform toward the inside or outside of the ring.

[0017] As an optional solution, the air vent shroud also includes a support member, and the drive mechanism includes a drive mechanism body and an output end that can move linearly relative to it. The output end is connected to or abuts against the shroud body, and the drive mechanism body is connected to the support member.

[0018] As an optional solution, the output terminal includes:

[0019] The output shaft is capable of linear motion relative to the main body of the drive mechanism; and

[0020] The abutment is rotatably connected to the output shaft, and the abutment has an abutment surface that abuts against the outer peripheral surface of the cover.

[0021] The two objectives of this utility model are to provide a fan system that avoids reducing the diameter of the air outlet hood, ensures that the fume treatment device always has a good exhaust volume, and ensures that the fume treatment device always has a good fume extraction effect.

[0022] To achieve this objective, the present invention adopts the following technical solution:

[0023] A fan system includes a volute, the volute including an air outlet, and the fan system further includes an air outlet shroud as described above, the air outlet shroud being installed on the air outlet.

[0024] The three objectives of this utility model are to provide an oil fume treatment device that avoids reducing the diameter of the exhaust hood, ensures that the oil fume treatment device always has a good exhaust volume, and ensures that the oil fume treatment device always has a good oil fume absorption effect.

[0025] To achieve this objective, the present invention adopts the following technical solution:

[0026] An oil fume treatment device includes an exhaust hood as described above and / or a fan system as described above.

[0027] As an alternative, the exhaust hood is connected to an outdoor duct, and the fume treatment device further includes a separation device connected to the outdoor duct and configured to separate solid impurities in the outdoor duct.

[0028] The beneficial effects of this utility model are:

[0029] The exhaust hood provided by this utility model includes a hood body, a heating mechanism, and a driving assembly. The hood body is annular and has a fluid outlet. The heating mechanism heats the oil stains on the hood body, and the driving assembly drives the hood body to deform. The deformed hood body allows carbonized substances to detach, and the detached substances are blown into an outdoor duct by a fan system. This achieves cleaning of the oil stains on the exhaust hood, prevents the diameter of the exhaust hood from decreasing, ensures a consistently good exhaust volume for the fume treatment device, and maintains a consistently good fume extraction effect. Furthermore, it prevents the exhaust hood from becoming too strong, ensuring that the driving mechanism can consistently adjust the preset shape of the exhaust hood effectively.

[0030] The fan system provided by this utility model includes the above-mentioned exhaust hood, which avoids reducing the diameter of the exhaust hood, ensures that the fume treatment device always has a good exhaust volume, and ensures that the fume treatment device always has a good fume extraction effect.

[0031] The oil fume treatment device provided by this utility model includes the above-mentioned exhaust hood and fan system, which avoids the reduction of the exhaust hood diameter, ensures that the oil fume treatment device always has a good exhaust volume, and ensures that the oil fume treatment device always has a good oil fume absorption effect. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the fume treatment device provided in this embodiment of the utility model;

[0033] Figure 2 This is a cross-sectional view of the fume treatment device provided in this embodiment of the utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the fume treatment device, outdoor duct, separation device, and public flue provided in this embodiment of the utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the air outlet hood provided in this embodiment of the utility model;

[0036] Figure 5 This is a cross-sectional view of the air outlet hood provided in an embodiment of this utility model;

[0037] Figure 6 This is a cross-sectional view of the cover, heating mechanism, and first heat insulation layer provided in this embodiment of the utility model;

[0038] Figure 7 This is an exploded view of the fume treatment device and outdoor pipeline provided in this embodiment of the utility model.

[0039] In the picture:

[0040] 100. Fume treatment device; 200. Outdoor duct; 400. Public exhaust duct;

[0041] 10. Housing; 11. Baffle; 111. Air inlet; 112. Baffle body; 113. First side plate; 13. Housing body; 15. Mixing chamber;

[0042] 20. Fan system; 21. Volute; 211. Air inlet; 2111. First longitudinal center section; 212. Air outlet; 2121. Second longitudinal center section; 22. Impeller; 23. Air outlet hood; 231. Air outlet hood body; 2311. Fluid inlet; 232. Flange; 233. Gap; 234. Reinforcing rib; 235. Cover; 2351. Fluid outlet; 23511. Outer contour; 2352. Outer peripheral surface; 236. Support component; 237. Drive assembly; 2371. Drive mechanism; 23711. Drive mechanism body; 23712. Output end; 237121. Output shaft; 237122. Abutment component; 2371221. Abutment curved surface; 2391. Heating mechanism; 2392. First heat insulation layer;

[0043] 30. Transfer pipe; 31. Transfer pipe main body; 311. Transfer pipe inlet; 312. Transfer pipe outlet; 32. Second insulation layer;

[0044] 40. First fixing component; 41. Adhesive tape; 42. First fixing element;

[0045] 50. Main unit case;

[0046] 60. Separation device;

[0047] 90. Smoke collection assembly; 91. Smoke collection plate; 92. Second side plate; 93. Flip plate. Detailed Implementation

[0048] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0049] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0052] like Figure 1 As shown, this utility model embodiment provides an oil fume treatment device 100, which includes a housing 10 and a fan system 20. The housing 10 has an air inlet 111, and at least part of the fan system 20 is disposed inside the housing 10 and has an air inlet 211 and an air outlet 212. The air inlet 111, the air inlet 211 and the air outlet 212 are arranged along the direction of gas flow. When the fan system 20 is working, the fan system 20 can generate a negative pressure inside the housing 10. Oil fumes outside the oil fume treatment device 100 can enter the fan system 20 for filtration after passing through the air inlet 111 and the air inlet 211. The filtered gas is discharged to an outdoor duct (not shown in the figure) from the air outlet 212.

[0053] It should be noted that the fume treatment device 100 in this embodiment can be a side-draft range hood, a top-mounted range hood, a European-style range hood, an integrated stove, etc. All devices capable of treating fumes are within the protection scope of this optional embodiment.

[0054] like Figure 1 As shown, the air inlet 211 can be an elongated opening extending from right to left (i.e., the second direction), thereby ensuring a large negative pressure at the air inlet 211, allowing external fumes to enter the housing 10. It should be noted that the left and right directions in this embodiment are defined with reference to the fume treatment device 100 itself.

[0055] like Figure 1As shown, the fan system 20 of this embodiment can be a centrifugal fan system. The centrifugal fan system includes a volute 21 and an impeller 22 rotatably disposed inside it. The volute 21 has an air inlet 211 and an air outlet 212. When the impeller 22 rotates, a vacuum is formed inside the volute 21, so that the oil fumes enter from the air inlet 211. The oil fumes achieve gas-liquid separation inside the volute 21 due to centrifugal action, thereby realizing the filtering function of the fan system 20 for oil fumes.

[0056] like Figure 1 As shown, the fan system 20 also includes an exhaust hood 23, which is connected to the air outlet 212 and to an outdoor duct (not shown in the figure). The function of the exhaust hood 23 is to prevent backflow of oil fumes, ensure a better environment in the kitchen, and reduce the smell of oil fumes in the kitchen.

[0057] like Figure 1 As shown, the fume treatment device 100 also includes a main unit box 50, which is covered outside the exhaust hood 23 to ensure the overall aesthetics of the fume treatment device 100.

[0058] In an alternative embodiment, such as Figure 1 and Figure 3 As shown, the fume treatment device 100 also includes a fume collection component 90, which can open or block the air inlet 111. When the fume collection component 90 opens the air inlet 111, it can effectively collect the fumes, thereby achieving a better fume extraction effect for the fume treatment device 100.

[0059] In an alternative embodiment, such as Figure 1 and Figure 3 As shown, the fume treatment device 100 also includes a linear drive mechanism (not shown in the figure). The housing 10 includes a housing body 13 and a baffle 11 with an air inlet 111. The smoke collection assembly 90 is rotatably connected to the housing body 13 and located above the baffle 11. The upper end of the baffle 11 is movably connected to the smoke collection assembly 90, and the lower end of the smoke collection assembly 90 is rotatably connected to the housing body 13. One end of the linear drive mechanism is rotatably connected to the housing body 13, and the other end of the linear drive mechanism is rotatably connected to the smoke collection assembly 90. When the linear drive mechanism is in the unfolded state, the smoke collection assembly 90 flips forward and drives the baffle 11 to flip forward. The fan system 20, the smoke collection assembly 90, and the baffle 11 together form a mixing cavity 15, which increases the distance between the air inlet 111 and the air inlet 211, allowing the fumes to redistribute their kinetic energy through viscous shearing action, eliminating fluid disturbance at the air inlet 211, and making the air intake speed on the left and right sides of the air inlet 211 tend to be the same.

[0060] In an alternative embodiment, such as Figure 1 , Figure 3 and Figure 7 As shown, the smoke collection assembly 90 includes a smoke collection plate 91 and a second side plate 92. The smoke collection plate 91 is provided with a second side plate 92 on both the left and right sides. The baffle 11 includes a baffle body 112 and a first side plate 113. The baffle body 112 is provided with a first side plate 113 on both the left and right sides. The air inlet 111 is provided on the baffle body 112. When the smoke collection assembly 90 and the baffle 11 are both in the forward-flipped state, the smoke collection plate 91, the second side plate 92, the baffle body 112 and the first side plate 113 together form a relatively sealed mixing cavity 15, which allows the oil fumes to better redistribute kinetic energy through viscous shearing action, better eliminate fluid disturbance at the air inlet 211, and better make the left and right air intake speeds of the air inlet 211 tend to be the same.

[0061] In an alternative embodiment, such as Figure 1 , Figure 3 and Figure 7 As shown, a flip-up flap 93 is rotatably mounted at the lower end of the smoke-collecting plate 91. By adjusting the flip angle of the flap 93, a consistently good smoke-collecting effect can be achieved for oil fumes in different states. Specifically, a drive device can also be provided to realize the rotation of the flap 93 relative to the smoke-collecting plate 91. For example, the drive device can be a linear motor, with one end of the linear motor rotatably connected to the smoke-collecting plate 91 and the other end of the linear motor rotatably connected to the flap 93. Of course, the drive device can also be a rotary motor, with the rotating shaft of the rotary motor fixedly connected to the rotating shaft of the flap 93.

[0062] In an alternative embodiment, such as Figure 1 and Figure 2 As shown, due to the shape limitations of the volute 21 itself, the air inlet 211 has a first longitudinal central section 2111 extending in the front-to-back direction (i.e., the first direction), and the air outlet 212 has a second longitudinal central section 2121 extending in the front-to-back direction. The second longitudinal central section 2121 and the first longitudinal central section 2111 are arranged alternately from right to left. When the impeller 22 is driven to rotate by a motor (not shown in the figure), the gas at the air inlet 211 is drawn into the fluid by the negative pressure generated by the impeller 22, and the fluid is thrown along the inner wall of the volute 21 by the rotation of the blades of the impeller 22. Figure 1As shown, taking the clockwise rotation of impeller 22 as an example, since the second longitudinal center section 2121 and the first longitudinal center section 2111 are arranged alternately from right to left, the space inside the volute 21 gradually increases from left to right. The amount of fluid also increases as the impeller 22 throws air from left to right. Since the fluid is centrifugally thrown out by the blades along the tangential direction of the arc, the fluid will have centrifugal force. This results in the fluid velocity near the right side of the fluid outlet 2351 of the air outlet hood 23 being higher and the velocity near the left side being lower, leading to the fluid outlet... The uneven flow velocity of the fluid across the entire cross section 2351 will cause the fluid to easily generate eddies or resistance inside the volute 21 and the exhaust hood 23, making it impossible to form a stable and efficient fluid channel. As a result, some of the fumes can be discharged smoothly, while others may linger in the fume treatment device 100 or even flow back into the kitchen, resulting in a significant decrease in the fume extraction effect of the fume treatment device 100 and a reduction in the exhaust efficiency of the fume treatment device 100. Consequently, the "suction" of the fume treatment device 100 is not as strong as before, and fumes are more likely to spread when cooking. In addition, the flow rate of the fluid in the entire cross-section of the fluid outlet 2351 may be uneven when the fume treatment device 100 is in different gears or working states. This can also cause the fluid to easily generate eddies or resistance inside the volute 21 and the exhaust hood 23, making it impossible to form a stable and efficient fluid channel. This can also cause some of the fumes to be discharged smoothly, while others may linger inside the fume treatment device 100 or even flow back into the kitchen. As a result, the fume extraction effect of the fume treatment device 100 is significantly reduced, the exhaust efficiency of the fume treatment device 100 is reduced, and the "suction power" of the fume treatment device 100 is not as strong as before, making it easier for fumes to spread when cooking.

[0063] In addition, the uneven flow velocity of the fluid across the entire cross-section of the fluid outlet 2351 will also cause the fan system 20 to generate severe vibration and abnormal wind noise. Users will hear a much louder "humming" sound, "rumbling" sound or harsh wind noise than usual, which will seriously affect the user's cooking experience.

[0064] Furthermore, the uneven flow velocity of the fluid across the entire cross-section of the fluid outlet 2351 will also cause uneven rotation of the impeller 22, which is equivalent to adding an extra and uneven burden to the motor. The motor will need to output more torque to maintain rotation, and will be in an overloaded state for a long time, leading to motor overheating, accelerated aging, and eventually possible motor burnout, which will aggravate the wear of the fan system 20 and shorten the service life of the fan system 20.

[0065] Furthermore, the uneven flow velocity of the fluid across the entire cross-section of the fluid outlet 2351 will cause vibration in the fan system 20 and even the fume treatment device 100. Continuous and severe vibration will be transmitted to every fixed point of the fume treatment device 100, which may cause loose screws, resonance of the housing 10, displacement or damage of internal parts. This "internal injury" will greatly shorten the normal life of the fume treatment device 100. In addition, the risk of parts falling off due to vibration is very dangerous once it occurs, affecting the normal use of the fume treatment device 100, and in severe cases, it may affect the personal safety of users.

[0066] To solve the above problems, such as Figures 1-5 As shown, the air outlet hood 23 of this embodiment includes a hood body 235 and a drive assembly 237. The hood body 235 is annular and has a fluid outlet 2351. The drive assembly 237 is used to acquire the flow velocity information of the fluid at the fluid outlet 2351 and drive the hood body 235 to deform according to the flow velocity information, so as to reduce the difference in flow velocity at various positions of the fluid outlet 2351, thereby achieving the effect of balancing the flow velocity of the fluid in the fluid outlet 2351, making the flow velocity of the fluid in the entire cross section of the fluid outlet 2351 relatively uniform, and reducing the fluid velocity at various positions of the fluid outlet 2351. The vortex or resistance generated inside the volute 21 and the exhaust hood 23 forms a relatively stable and efficient fluid channel, ensuring that most of the oil fumes can be discharged smoothly, preventing oil fumes from lingering inside the oil fume treatment device 100 or even flowing back into the kitchen, effectively improving the oil fume extraction effect of the oil fume treatment device 100, significantly improving the smoke exhaust efficiency of the oil fume treatment device 100, ensuring that the oil fume treatment device 100 always has good "suction power", preventing oil fumes from spreading outwards when cooking, and being adaptable to different settings and usage scenarios of the oil fume treatment device 100.

[0067] In addition, since the fluid velocity in the fluid outlet 2351 with the design of the present disclosure embodiment is relatively uniform, it can also avoid the fan system 20 from generating violent vibrations and abnormal wind noise. Users will hear a much louder "humming" sound, "rumbling" sound or harsh wind noise than usual, ensuring a better cooking experience for users.

[0068] Furthermore, since the fluid velocity in the fluid outlet 2351 of the embodiment of this disclosure is relatively uniform, the balance and uniformity of the impeller 22 rotation can be guaranteed. The motor will not be subjected to additional uneven load, the motor does not need to output more torque to maintain rotation, and it will not be in an overload state for a long time. This avoids problems such as motor overheating and accelerated aging, prevents motor burnout, reduces wear on the fan system 20, and improves the service life of the fan system 20.

[0069] Furthermore, because the fluid velocity within the fluid outlet 2351, designed according to this embodiment, is relatively uniform, vibrations in the fan system 20 or the fume treatment device 100 can be avoided. This prevents vibrations at each fixed point of the fume treatment device 100 due to continuous and severe vibrations, thus avoiding problems such as loose screws, resonance of the housing 10, displacement or damage of internal parts, and ensuring a longer lifespan for the fume treatment device 100. In addition, it also avoids the risk of parts falling off due to vibration, ensuring the normal operation of the fume treatment device 100 and guaranteeing the personal safety of the user.

[0070] In an alternative embodiment, such as Figures 1-3 As shown, the air outlet hood 23 also includes an air outlet hood body 231. The hood body 235 is connected to the air outlet hood body 231, and the air outlet hood body 231 is connected to the housing 10. The air outlet hood body 231 has a fluid inlet 2311, which is connected to the air outlet 212. By setting the air outlet hood body 231, on the one hand, the stable connection between the hood body 235 and the housing 10 can be ensured; on the other hand, the air outlet hood body 231 can achieve a good support effect for the hood body 235.

[0071] In an alternative embodiment, such as Figures 1-3 as well as Figure 7 As shown, the exhaust hood 23 also includes a flange 232, which is fixedly connected to the exhaust hood body 231 and the housing 10, thereby achieving a stable connection between the exhaust hood 23 and the housing 10. This prevents leakage of oil fumes inside the fume treatment device 100 due to gaps between the exhaust hood 23 and the housing 10, ensuring that the fume treatment device 100 always has a good fume extraction effect. For example, the flange 232 and the housing 10 can be fixedly connected by means such as pins, screws, or snap-fit ​​components, thereby achieving a stable connection between the exhaust hood 23 and the housing 10.

[0072] In an alternative embodiment, such as Figures 1-3 as well as Figure 7 As shown, the air outlet hood 23 also includes reinforcing ribs 234, which are fixedly connected to the flange 232 and the air outlet hood body 231 respectively. By setting the reinforcing ribs 234, the strength and stability of the connection between the flange 232 and the air outlet hood body 231 can be effectively enhanced, which can prevent the connection between the flange 232 and the air outlet hood body 231 from breaking, and ensure that the air outlet hood 23 has good overall strength, hardness and service life.

[0073] In an alternative embodiment, such as Figures 3-5As shown, the drive assembly 237 includes at least two drive mechanisms 2371 distributed circumferentially along the cover 235. Each drive mechanism 2371 can drive a portion of the cover 235 to deform inward or outward according to flow velocity information. Through the drive of each drive mechanism 2371, the cross-sectional shape of the cover 235 can be changed, thereby rectifying and adjusting the fluid inside the cover 235 to reduce the difference in flow velocity at various locations of the fluid outlet 2351. By setting multiple drive mechanisms 2371, precise and refined adjustment of the cross-sectional shape of the cover 235 can be achieved, allowing the adjusted cover 235 to adapt to more diverse application scenarios. It should be noted that within a limited space, the more drive mechanisms 2371 are set, the more refined the adjustment of the cross-sectional shape of the cover 235 can be achieved. It should be noted that, as... Figure 4 In the structure shown, each dotted line represents a drive mechanism 2371. For the sake of simplification, not all drive mechanisms 2371 are drawn in this application.

[0074] In an alternative embodiment, such as Figure 4 and Figure 5 As shown, the drive mechanism 2371 can be set on the outside of the cover 235, thereby avoiding interference with the fluid inside the cover 235 and enabling the drive mechanism 2371 to drive the cover 235 to change its shape to adapt to different usage scenarios.

[0075] In an optional embodiment, the drive mechanism 2371 can also be disposed inside the housing 235 (not shown in the figure), thereby reducing the horizontal dimension of the housing 235, effectively reducing the space occupied by the main unit chassis 50, achieving a small-volume design for the main unit chassis 50, and avoiding the problem of the main unit chassis 50 extending out of the shell 10 in the front-to-back direction due to an excessively large design. Specifically, support members can be provided at intervals inside the housing 235, and the support members are connected to the housing 235. The drive mechanism 2371 includes a drive mechanism body 23711 and an output end 23712 that can move linearly relative to it. The output end 23712 is connected to the housing 235. The drive mechanism body 23711 is fixedly connected to the support member 236, and the support member 236 can provide a stable support effect for the drive mechanism 2371.

[0076] In an alternative embodiment, such as Figures 1-5 as well as Figure 7As shown, the air vent 23 also includes support members 236, which are spaced apart on the outer periphery of the hood 235. A drive mechanism 2371 is disposed in the gap 233 between the hood 235 and the support members 236. The drive mechanism 2371 includes a drive mechanism body 23711 and an output end 23712 capable of linear motion relative to it. The output end 23712 is connected to the hood 235, and the drive mechanism body 23711 is fixedly connected to the support members 236. By extending and retracting the output end 23712 of each drive mechanism 2371, a variety of air vents 23 with different shapes can be formed. For example, the drive mechanism 2371 can be a linear motor, a linear cylinder, etc. All structures and mechanisms capable of outputting linear motion are within the protection scope of this optional embodiment.

[0077] In an alternative embodiment, such as Figures 3-5 As shown, the output end 23712 includes an output shaft 237121 and an abutment 237122. The output shaft 237121 can move linearly relative to the drive mechanism body 23711. The abutment 237122 is rotatably connected to the output shaft 237121. The abutment 237122 has an abutment surface 2371221, which abuts against the outer peripheral surface 2352 of the cover 235. The purpose is that when the output shaft 237121 moves in a telescopic motion, the abutment surface 2371221 can adaptively adjust its angle according to the shape deformation of the cover 235, so that the shape of the abutment surface 2371221 and the outer peripheral surface 2352 of the cover 235 are more matched and have a better fit.

[0078] In an alternative embodiment, such as Figures 1-5 As shown, the cover 235 has a certain rigidity and a certain amount of elastic deformation, thereby ensuring that the cover 235 can deform under the driving action of the driving component 237 without collapsing. For example, the cover 235 can be made of a plate-like structure with a certain amount of elastic deformation, such as a plastic plate, steel plate, rubber plate, or silicone plate, which does not change its overall outer contour significantly and only has the characteristic of local deformation adjustment.

[0079] Because the exhaust hood 23 receives a large amount of oily fumes, a significant amount of condensed and dried oil will accumulate on it over time, causing the diameter of the exhaust hood 23 to decrease. This affects the exhaust volume of the fume treatment device 100 and reduces its fume extraction efficiency. Furthermore, it also increases the overall strength of the exhaust hood 23, making it impossible for the drive mechanism 2371 to achieve the intended thrust of the exhaust hood 23.

[0080] To solve the above problems, such as Figure 3 and Figure 6As shown, the hood 235 also includes a heating mechanism 2391. The heating mechanism 2391 is used to heat the oil stains on the hood 235, carbonizing the oil stains on the surface of the hood 235. This will activate the fan system 20, and the drive components 237 around the hood 235 will operate intermittently, thereby deforming the hood 235. The deformed hood 235 allows the carbonized material to fall off, and the fan system 20 blows the fallen material into the outdoor duct 200. This achieves the cleaning of oil stains on the exhaust hood 23, preventing the diameter of the exhaust hood 23 from decreasing, ensuring that the fume treatment device 100 always has a good exhaust volume and a good fume extraction effect. In addition, it also prevents the exhaust hood 23 from becoming too strong, ensuring that the drive mechanism 2391 can always make good adjustments to the preset shape of the exhaust hood 23.

[0081] For example, such as Figure 3 and Figure 6 As shown, the heating mechanism 2391 includes a heating layer, which is attached to the inner periphery of the cover 235. The heating layer is a flexible and variable structure, enabling it to deform with the overall shape of the cover 235. Furthermore, the overall structure of the heating layer occupies little space and does not significantly affect the fluid inside the cover 235. For example, the heating layer can be a heating wire, a polyester flexible heater, a PI heating element, a semiconductor flexible heating layer, etc. All flexible structures capable of heating are within the protection scope of this optional embodiment. In other optional embodiments, the heating layer can also be attached to the outer periphery of the cover 235, or it can be embedded inside the cover 235.

[0082] As a preferred embodiment, the heating mechanism 2391 can be a heating wire structure. By setting the heating wire structure, the heating wire structure can deform with the overall shape of the cover 235. Moreover, the overall structure of the heating wire occupies little space and will not have a significant impact on the fluid inside the cover 235.

[0083] In other alternative embodiments, the heating mechanism 2391 may also be a heating tube, a blower mechanism, etc. All mechanisms or structures that can heat the cover 235 are within the protection scope of this alternative embodiment.

[0084] In an optional embodiment, one of the heating mechanism 2391 and the driving component 237 is located inside the cover 235, and the other of the heating mechanism 2391 and the driving component 237 is located outside the cover 235. This can avoid hard contact between the driving component 237 and the heating mechanism 2391, reduce the risk of damage to the heating mechanism 2391 by the driving component 237, and ensure that the heating mechanism 2391 and the driving component 237 always have good performance and a long service life.

[0085] In an alternative embodiment, such as Figure 3 As shown, the fume treatment device 100 also includes a separation device 60, which is disposed between the outdoor duct 200 and the public flue 400. The separation device 60 can separate the solid and gas in the gas blown out from the exhaust hood 23, and collect solid impurities in the blown gas, thereby preventing pollution to the public flue 400 and the external environment. For example, the separation device 60 can be a cyclone separator, a filter assembly, etc., and all structures capable of solid-gas separation are within the protection scope of this optional embodiment.

[0086] In an alternative embodiment, such as Figure 3 and Figure 6 As shown, the air outlet hood 23 also includes a first heat insulation layer 2392, which is attached to the outer peripheral surface 2352 of the hood 235. From the inside to the outside of the hood 235, the heating mechanism 2391, the hood 235, the first heat insulation layer 2392, and the drive assembly 237 are arranged sequentially. The drive assembly 237 is in contact with the first heat insulation layer 2392, which can prevent high temperatures from damaging the drive assembly 237, ensuring a longer service life and better working condition for the drive assembly 237. For example, the material of the first heat insulation layer 2392 can be mineral wool, glass wool, polystyrene foam board, polyurethane foam, aluminum silicate fiber, etc. All types of heat insulation materials are within the protection scope of this disclosure embodiment.

[0087] To solve the above problems, such as Figure 3 and Figure 7As shown, the fan system 20 of this embodiment further includes a transfer pipe 30. The transfer pipe 30 includes a transfer pipe inlet 311 and a transfer pipe outlet 312. The transfer pipe inlet 311 is connected to and sealed to the fluid outlet 2351. The transfer pipe outlet 312 is circular and is connected to the inlet of the outdoor pipe 200. The size and shape of the transfer pipe outlet 312 are the same as the size and shape of the inlet of the outdoor pipe 200. From the transfer pipe inlet 311 to the transfer pipe outlet 312 of the transfer pipe 30, the outer contour shape of the cross-section of the transfer pipe 30 gradually transitions from the shape of the fluid outlet 2351 to a circle. Through this design... The design of the connecting pipe 30 serves two purposes: firstly, it allows for quick, convenient, and precise connection with the fluid outlet 2351; secondly, it enables quick, convenient, and precise connection with the inlet of the outdoor pipe 200. This prevents gaps between the connecting pipe 30 and the inlet of the outdoor pipe 200, thus preventing fluid leakage and ensuring effective fume extraction by the fume treatment device 100. This also improves the fume extraction efficiency and suction power of the fume treatment device 100, preventing the spread of cooking fumes. It should be noted that to achieve a good sealing connection between the connecting pipe 30 and the exhaust hood 23, the connecting pipe 30 can utilize a structure and material similar to the exhaust hood 23 that allows for a certain degree of elastic deformation.

[0088] In addition, such as Figure 3 and Figure 7 As shown, from the inlet 311 to the connector 30, the outer contour of the connector 30's cross-section gradually transitions from the shape of the fluid outlet 2351 to a circle. The connector 30 enables a smooth transition of fluid from the exhaust hood 23 to the outdoor duct 200. Through viscous shearing within the connector 30, the fluid's kinetic energy is redistributed, preventing turbulence and eliminating disturbances within the outdoor duct 200. This achieves a uniform distribution of fluid velocity within the outdoor duct 200, reducing noise and improving the user experience. Furthermore, the connector 30 also minimizes wind speed loss caused by uneven fluid velocity distribution within the outdoor duct 200, ensuring the fume treatment device 100 consistently delivers optimal fume extraction performance.

[0089] In an alternative embodiment, such as Figure 7As shown, the height H of the adapter pipe 30 in the vertical direction is greater than or equal to 50mm and less than or equal to 200mm. Utilizing this height, the adapter pipe 30 provides sufficient length to allow the fluid to redistribute its kinetic energy through viscous shear, preventing fluid turbulence within the outdoor pipe 200 and eliminating disturbances. This achieves a uniform distribution of fluid velocity within the outdoor pipe 200, reducing noise and improving the user experience. Furthermore, the sufficient length of the adapter pipe 30 to allow for kinetic energy redistribution through viscous shear also reduces wind speed loss caused by uneven fluid velocity distribution within the outdoor pipe 200, minimizing wind speed loss and ensuring consistently good fume extraction performance of the fume treatment device 100.

[0090] In an alternative embodiment, such as Figure 3 As shown, the transfer pipe 30 includes a transfer pipe body 31 and a second heat insulation layer 32. The second heat insulation layer 32 is disposed on the outer periphery or inner side of the transfer pipe body 31. The second heat insulation layer 32 prevents heat from being conducted outward from the inside of the transfer pipe 30, thus preventing overheating of the transfer pipe 30 from damaging the cabinet or cavity in its environment. For example, the material of the second heat insulation layer 32 can be mineral wool, glass wool, polystyrene foam board, polyurethane foam, aluminum silicate fiber, etc. All types of heat insulation materials are within the protection scope of this disclosure.

[0091] In an alternative embodiment, such as Figure 7 As shown, the fan system 20 also includes a first fixing component 40, which fixes the outdoor pipe 200 to the transfer pipe 30, thereby enabling a stable connection between the outdoor pipe 200 and the transfer pipe 30.

[0092] In an alternative embodiment, such as Figure 7 As shown, the first fixing component 40 may include tape 41, which is placed around the outer periphery of the connection position between the outdoor pipe 200 and the adapter pipe 30. The tape 41 is adhered to both the outdoor pipe 200 and the adapter pipe 30, thereby achieving a stable connection between the outdoor pipe 200 and the adapter pipe 30 and preventing fluid leakage from the gap between the outdoor pipe 200 and the adapter pipe 30.

[0093] In an alternative embodiment, such as Figure 7As shown, the first fixing component 40 may further include a first fixing member 42, which passes through the outdoor pipe 200 and the adapter pipe 30, thereby achieving a secure connection between the outdoor pipe 200 and the adapter pipe 30 and preventing fluid leakage from the gap between the outdoor pipe 200 and the adapter pipe 30. For example, the first fixing member 42 may be a screw, pin, snap-fit ​​assembly, etc., and all first fixing members 42 capable of achieving a secure connection between the outdoor pipe 200 and the adapter pipe 30 are within the protection scope of this optional embodiment.

[0094] In an alternative embodiment, such as Figure 7 As shown, the fan system 20 also includes a second fixing component (not shown in the figure), which securely connects the air outlet shroud 23 to the adapter pipe 30, thereby achieving a stable connection between the air outlet shroud 23 and the adapter pipe 30. For example, the second fixing component can be a screw, pin, clip assembly, etc., and all second fixing components capable of achieving a stable connection between the outdoor duct 200 and the adapter pipe 30 are within the protection scope of this optional embodiment.

[0095] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An air outlet cover, characterized in that, include: The cover (235) is annular and has a fluid outlet (2351); Heating mechanism (2391) is configured to heat the oil stains on the cover (235); and The drive component (237) is configured to drive the deformation of the cover (235).

2. The air outlet hood according to claim 1, characterized in that, The heating mechanism (2391) includes: The heating layer is attached to the inner circumference of the cover (235), attached to the outer circumference of the cover (235), and / or embedded in the interior of the cover (235).

3. The air outlet hood according to claim 1, characterized in that, One of the heating mechanism (2391) and the driving assembly (237) is located inside the cover (235), and the other is located outside the cover (235).

4. The air outlet hood according to claim 3, characterized in that, The air outlet shroud also includes: The first heat insulation layer (2392) is attached to the outer peripheral surface (2352) of the cover (235), and the heating mechanism (2391), the cover (235), the first heat insulation layer (2392) and the driving assembly (237) are arranged in sequence from the inside of the cover (235) to the outside of the cover (235).

5. The air outlet hood according to any one of claims 1 to 4, characterized in that, The driving component (237) includes: At least two drive mechanisms (2371) are distributed circumferentially along the cover (235), and each drive mechanism (2371) can drive a portion of the cover (235) to deform toward the inside or outside of the ring.

6. The air outlet hood according to claim 5, characterized in that, The air hood also includes a support member (236), and the drive mechanism (2371) includes a drive mechanism body (23711) and an output end (23712) that can move linearly relative to it. The output end (23712) is connected to or abuts against the hood body (235), and the drive mechanism body (23711) is connected to the support member (236).

7. The air outlet hood according to claim 6, characterized in that, The output terminal (23712) includes: The output shaft (237121) is capable of linear motion relative to the drive mechanism body (23711); and The abutment (237122) is rotatably connected to the output shaft (237121), and the abutment (237122) has an abutment surface (2371221) that abuts against the outer peripheral surface (2352) of the cover (235).

8. A fan system comprising a volute (21) including an air outlet (212), characterized in that, The fan system further includes an air outlet shroud as described in any one of claims 1 to 7, the air outlet shroud being installed at the air outlet (212).

9. An oil fume treatment device, characterized in that, Includes the air outlet hood as described in any one of claims 1 to 7 and / or the fan system as described in claim 8.

10. The fume treatment device according to claim 9, characterized in that, The exhaust hood is connected to the outdoor duct (200), and the fume treatment device further includes a separation device (60), which is connected to the outdoor duct (200) and configured to separate solid impurities in the outdoor duct (200).

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