An oil fume treatment device

Abstract

The present application relates to the technical field of kitchen appliances, and particularly relates to an oil fume treatment device. The oil fume treatment device comprises a shell, a flap, a driving mechanism and a connecting rod assembly. The shell has an air inlet. The flap is rotationally connected to the shell at a first position E. The flap can be flipped from a blocking state of blocking the air inlet to an extended state of opening the air inlet. The driving mechanism is movably connected to the flap. The connecting rod assembly is rotationally connected to the shell at a second position A. The connecting rod assembly is rotationally connected to the driving mechanism at a third position C. When the flap is in the blocking state, the second position A, the third position C and the first position E are arranged in sequence along the opening direction of the flap. When the flap is in the extended state, the third position C, the second position A and the first position E are arranged in sequence along the opening direction of the flap. The space size of the smoke gathering area U formed by the flap is effectively expanded, and the oil fume treatment device can achieve a better oil fume absorption effect.

Description

[0001] This application claims priority to patent application number 202611031570.6 (the earlier application was filed on July 13, 2026, and the invention is entitled "An Oil Fume Treatment Device"). Technical Field

[0002] This invention relates to the field of kitchen appliance technology, and in particular to an oil fume treatment device. Background Technology

[0003] Existing fume treatment devices typically include a fan assembly and an air inlet assembly. The fan assembly and the air inlet assembly are connected. The air inlet assembly is equipped with an air inlet. The fan assembly can generate negative pressure. The negative pressure generated by the fan assembly allows the fumes outside the fume treatment device to pass through the air inlet, the inside of the air inlet assembly, and the fan assembly in sequence. The filtered gas is finally discharged from the air outlet of the fan assembly.

[0004] Existing air intake components typically include a drive mechanism, a flap, and a housing with an air inlet. The flap is rotatably connected to the housing, one end of the drive mechanism is rotatably connected to the housing, and the other end of the drive mechanism is rotatably connected to the flap. The drive mechanism can drive the flap to open or block the air inlet. Due to the limitations of the drive mechanism's extension and retraction and the small overall space of the air intake component, the maximum opening angle of the flap is small, which affects the oil fume extraction effect of the fume treatment device.

[0005] Therefore, there is an urgent need to design a new fume treatment device to solve the problems of small maximum opening angle of the flap and poor fume extraction effect of the fume treatment device. Summary of the Invention

[0006] The purpose of this invention is to provide an oil fume treatment device that effectively increases the maximum opening angle of the flap and improves the oil fume extraction effect of the oil fume treatment device.

[0007] To achieve this objective, the present invention adopts the following technical solution: An oil fume treatment device, comprising: The casing has an air inlet; A flap is rotatably connected to the housing at a first position E. The flap can be flipped from a blocked state that blocks the air inlet to an extended state that opens the air inlet. The drive mechanism is movably connected to the housing; and A linkage assembly is rotatably connected to the flap; the linkage assembly is rotatably connected to the housing at a second position A; and the linkage assembly is rotatably connected to the drive mechanism at a third position C. When the flap is in the blocked state, the second position A, the third position C, and the first position E are arranged sequentially along the opening direction of the flap; When the flap is in the extended state, the third position C, the second position A, and the first position E are arranged sequentially along the opening direction of the flap.

[0008] As an optional solution, the line connecting the second position A and the third position C is a first connecting line M1. During the process of the flap switching from the blocking state to the extending state, the angle by which the first connecting line M1 rotates is a first flip angle γ, and the first flip angle γ is greater than or equal to 90°; and / or During the switching between the blocking state and the extended state, the third position C, the second position A, and the first position E are arranged from top to bottom.

[0009] As an alternative, the linkage assembly includes at least two linkages, and the housing, the at least two linkages, and the flap are sequentially rotatably connected end to end, with two adjacent linkages rotatably connected at the fourth position B.

[0010] As an optional solution, when the flap is in the blocked state, the fourth position B is located above the second position A, and the fourth position B and the second position A are arranged along the opening direction of the flap; when the flap is in the extended state, the fourth position B is located below the second position A, and the second position A and the fourth position B are arranged along the opening direction of the flap; and / or The drive mechanism is rotatably connected to the housing at the fifth position D. The line connecting the second position A and the fourth position B is the second connecting line M2. When the flap is in the blocking state, the fifth position D, the second connecting line M2, and the third position C are arranged along the opening direction of the flap; and / or The drive mechanism includes a drive body and a push rod that can move linearly relative to it. The drive body is rotatably connected to the housing, and the push rod is rotatably connected to the linkage assembly at the third position C. When the flap is in the extended state, the fourth position B is located below the push rod. When the flap is in the blocked state, the fourth position B is located above the push rod.

[0011] As an optional solution, when the flap is in the blocked state, the linkage assembly is in a retracted state and completely housed within the housing. The retracted linkage assembly has an upper side, and the fourth position B is not higher than this upper side; and / or The line connecting the second position A and the third position C is the first line M1, the length of the second line M2 is the first length L1, and the length of the first line M1 is the second length L2, wherein L2 < L1.

[0012] As an optional solution, the connecting rod rotatably connected to the housing includes a first straight segment, an arc-shaped transition segment, and a second straight segment connected in sequence. The second position A and the third position C are located on the first straight segment, and the fourth position B is located on the second straight segment. The first straight segment and the second straight segment are set at an angle, and the arc-shaped transition segment protrudes in a direction away from the second position A.

[0013] As an alternative, the width of the arcuate transition segment gradually decreases from the first straight segment to the second straight segment; and / or The arc-shaped transition segment includes an outer arc, wherein the outer arc is a circular arc; or, from the first straight line segment to the second straight line segment, the radius of curvature ρ of the outer arc gradually decreases; and / or The arc-shaped transition section has a first outer contour point Q at the junction with the second straight section, and the second straight section has a second outer contour point M corresponding to the fourth position B. When the flap is in the blocking state, both the first outer contour point Q and the second outer contour point M are located below the top plate of the shell and on the same horizontal plane; and / or When the flap is in the blocked state, the fourth position B is located above the first straight segment; when the flap is in the extended state, the fourth position B is located below the first straight segment.

[0014] As an optional solution, when the flap is in the blocked state, the distance between the first outer contour point Q and the top plate is a first distance S1, and the width of the second straight line segment is a first width D1, where 0 ≤ S1 ≤ 0.5D1; and / or When the flap is in the blocked state, the second straight segment extends horizontally, the flap extends horizontally and is not lower than the lowest end of the housing, the upper side of the second straight segment and the front surface of the flap are a second distance S2 in the vertical direction, and the depth of the inner cavity of the housing is a third distance S3, wherein 0.8×S3≤S2≤S3; and / or When the flap is in the blocked state, the front surface of the flap is flush with the outer surface of the housing.

[0015] As an optional solution, the linkage assembly is rotatably connected to the flap at the sixth position F, and the length of the line connecting the first position E and the sixth position F is the third length L3; wherein, the length of the line connecting the second position A and the first position E is the fourth length L4, and the length of the line connecting the fourth position B and the sixth position F is the fifth length L5; wherein: L1+L3<L4+L5; or, wherein the flap has a bottom end G, and the length of the line connecting the sixth position F and the bottom end G is the sixth length L6, wherein 1 / 3≤L6 / L3≤2; and / or The linkage assembly is rotatably connected to the flap at the sixth position F. When the flap is in the extended state, the sixth position F, the first position E, the fourth position B, the second position A, and the third position C are arranged sequentially along the opening direction of the flap, and the third position C, the second position A, the first position E, the fourth position B, and the sixth position F are arranged from top to bottom.

[0016] As an alternative, the housing has an inner cavity, and the first position E is a first rotating shaft, which is completely hidden within the inner cavity.

[0017] As an alternative, along the opening direction of the flap, the first rotating shaft is located on the front side of the inner cavity; the first rotating shaft is also located at a lower position in the inner cavity.

[0018] As an alternative, along a horizontal direction perpendicular to the extension direction of the first rotating shaft, the size of the housing is a fourth distance S4, the first rotating shaft has a central axis C1, and the distance between the central axis C1 and the front side of the housing along the front-rear direction is a fifth distance S5, where max(10mm, S4 / 33)≤S5≤min(S4 / 13, 25mm); and / or The housing includes a front baffle with a lower end face, a first rotating shaft with a central axis C1, a radius of a first radius R1, the central axis C1 being parallel to the lower end face, and a vertical distance S6 between the central axis C1 and the lower end face, wherein R1≤S6≤10mm; and / or The flap includes a front surface, a rear surface, and an upper surface disposed between the two, with the first rotating shaft disposed at the upper end of at least a portion of the upper surface.

[0019] As an alternative, the first rotating shaft has a central longitudinal section Z1 parallel to the front surface, the central longitudinal section Z1 being located between the front surface and the rear surface in the front-rear direction; and / or The front surface and the rear surface are parallel and both are perpendicular to the upper end face. The upper end face includes a mounting plate and a free end plate. The first rotating shaft is located at the upper end of the mounting plate. The first rotating shaft has a tangent surface W that is parallel to the mounting plate and tangent to the outer peripheral surface of the first rotating shaft. The first rotating shaft also has a central longitudinal section Z that is parallel to the mounting plate. The free end plate is disposed between the tangent surface W and the central longitudinal section Z.

[0020] As an optional solution, the first position E is the first pivot, along the horizontal direction perpendicular to the extension direction of the first pivot, the size of the shell is the fourth distance S4, and the height of the flap is the flap height H, where 300mm≤S4≤400mm, H≤S4, when the flap is in the extended state, the flap and the horizontal plane Y behind it form a first included angle α, 120°≤α≤160°.

[0021] The beneficial effects of this invention are: The oil fume treatment device provided by this invention includes a housing, a flap, a drive mechanism, and a connecting rod assembly. The housing has an air inlet. The flap is rotatably connected to the housing at a first position E. The flap can flip from a blocked state (blocking the air inlet) to an extended state (open air inlet). The drive mechanism is movably connected to the flap. The connecting rod assembly is rotatably connected to the housing at a second position A and a third position C. When the flap is in the blocked state, the second position A, the third position C, and the first position E are arranged sequentially along the opening direction of the flap. When the flap is in the extended state, the third position C, the second position A, and the first position E are arranged sequentially along the opening direction of the flap.

[0022] First, through the setting of the linkage assembly, when the flap is in the extended state, the linkage assembly is in the unfolded state. The extended linkage assembly is relatively long, and the longer linkage assembly can amplify the maximum opening angle of the flap, that is, the linkage assembly transmission amplifies the maximum opening angle.

[0023] Secondly, the line connecting the second position A and the third position C is the first connecting line M1. During the process of the flap switching from the blocking state to the extended state, the angle by which the first connecting line M1 rotates around the third position C is the first flip angle γ, which is positively correlated with the maximum opening angle of the flap. When the flap is in the blocking state, the second position A, the third position C, and the first position E are arranged sequentially along the opening direction of the flap; when the flap is in the extended state, the third position C, the second position A, and the first position E are arranged sequentially along the opening direction of the flap.

[0024] During the process of switching the flap from the blocking state to the extending state, the third position C switches from the front side of the second position A to the rear side of the second position A. The position switching range of the third position C is relatively large, that is, the first rotation angle γ of the first connecting line M1 is relatively large, so the maximum opening angle of the flap is relatively large.

[0025] Then, by setting the first position E relatively forward, under the constraint of the small overall space of the air intake component, the flap is set relatively forward. On the one hand, the overall height of the flap is larger; on the other hand, when the flap is in the extended state, the flap is set forward. In summary, when the flap is in the extended state, the smoke collection area U formed by the flap can be effectively increased, thereby effectively improving the overall smoke extraction effect of the fume treatment device.

[0026] In summary, this fume treatment device, through the coordinated and synergistic effects of "connecting rod assembly transmission to amplify the maximum opening angle", "the large position switching range of the third position C to increase the maximum opening angle of the flap", "the relatively forward position of the first position E to increase the overall height of the flap", and "the relatively forward position of the first position E to make the flap set forward as a whole", can effectively expand the size of the smoke collection area U formed by the flap, and achieve a better fume extraction effect. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the fume treatment device provided in an embodiment of the present invention; Figure 2 This is a first cross-sectional view of the fume treatment device provided in an embodiment of the present invention; Figure 3 This is a first schematic diagram of the linkage assembly in the deployed state provided in an embodiment of the present invention; Figure 4 This is a second cross-sectional view of the fume treatment device provided in an embodiment of the present invention; Figure 5 This is a second schematic diagram of the linkage assembly provided in an embodiment of the present invention; Figure 6 It is a schematic diagram of a linkage assembly provided by existing technology; Figure 7 This is a schematic diagram of the structure of the first connecting rod provided in an embodiment of the present invention; Figure 8 This is a first partial enlarged view of the oil fume treatment device provided in an embodiment of the present invention; Figure 9 This is a third sectional view of the fume treatment device provided in the embodiment of the present invention; Figure 10 This is a fourth cross-sectional view of the fume treatment device provided in the embodiment of the present invention; Figure 11This is a second partial enlarged view of the oil fume treatment device provided in an embodiment of the present invention; Figure 12 This is a third partial enlarged view of the oil fume treatment device provided in the embodiment of the present invention; Figure 13 This is a schematic diagram of the first structure of the linkage assembly, the first rotating shaft, and the drive mechanism provided in an embodiment of the present invention; Figure 14 This is a schematic diagram of the second structure of the linkage assembly, the first rotating shaft, and the drive mechanism provided in an embodiment of the present invention; Figure 15 This is a fourth partial enlarged view of the oil fume treatment device provided in the embodiment of the present invention; Figure 16 This is a partial structural schematic diagram of the fume treatment device provided in an embodiment of the present invention; Figure 17 This is a schematic diagram of the structure of the second connecting rod, the rotating assembly, and the second hinge seat provided in an embodiment of the present invention; Figure 18 This is a schematic diagram of the structure of the fourth rotating shaft provided in an embodiment of the present invention.

[0028] In the picture: 1000. Fume treatment device; 100. Air inlet assembly; 200. Fan assembly; 210. Air outlet; 10. Housing; 11. Top plate; 12. Support plate; 121. First hinge seat; 122. Clearance hole; 123. Limiting body; 14. Inner cavity; 15. Front baffle; 151. Front side; 152. Lower end face; 16. Rear baffle; 161. Rear side; 17. Sealing component; 18. Air inlet; 20. Flip plate; 21. Flip plate body; 211. Front surface; 212. Rear surface; 213. Top surface; 2131. Mounting plate; 2132. Free end plate; 22. Second hinge seat; 221. Second through hole; 30. First pivot; 40. Linkage assembly; 41. First link; 411. First straight segment; 412. Arc transition segment; 4121. Outer edge arc; 413. Second straight segment; 4131. Upper side; 42. Second link; 421. First through hole; 43. Limiting structure; 44. Connector; 50. Second rotating shaft; 51. Second rotating shaft body; 52. Limiting part; 60. Drive mechanism; 61. Drive body; 62. Push rod; 621. Push rod body; 622. Mounting component; 623. Moving part; 70. Bushing; 81. First gasket; 82. Second gasket; 90. Third pivot; 300. Rotating assembly; 310. Fourth rotating shaft; 3111. First rotating shaft body; 31111. Anti-detachment part; 311111. Texture; 31112. Rotating part; 31113. First threaded part; 3112. First limiting member; 320. Fixing member; 321. Fixing part; 3211. Second threaded part; 322. Second limiting member; 330. Third gasket; 340. Fourth gasket. Detailed Implementation

[0029] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings, not all of them.

[0030] In the description of this invention, 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, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to 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 invention based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly 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.

[0032] In the description of the embodiments disclosed herein, terms such as "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 limitations on the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0033] like Figure 1 and Figure 2As shown, this embodiment of the present disclosure provides an oil fume treatment device 1000, which includes an air inlet assembly 100 and a fan assembly 200. The fan assembly 200 is disposed above and connected to the air inlet assembly 100. The air inlet assembly 100 is provided with an air inlet 18. The fan assembly 200 can generate negative pressure, which allows oil fumes from outside the oil fume treatment device 1000 to pass sequentially through the air inlet 18, the interior of the air inlet assembly 100, and the fan assembly 200. The filtered gas is finally discharged from the air outlet 210 of the fan assembly 200. The oil fume treatment device 1000 can be a top-mounted range hood, a side-mounted range hood, a concealed range hood, etc. All devices capable of achieving oil fume treatment functions are included in this optional embodiment. This embodiment of the present disclosure mainly uses a concealed range hood as an example for description.

[0034] In an alternative embodiment, such as Figure 1 and Figure 2 As shown, this concealed range hood is particularly suitable for modern integrated kitchens. When turned off, its hidden design allows for fully integrated installation with custom cabinetry, visually blending seamlessly into the kitchen environment and achieving a unity of function and aesthetics. This deep integration not only completely frees up the space occupied by traditional top-mounted or side-mounted range hoods, but is also especially suitable for open kitchens and small-to-medium-sized kitchens that prioritize minimalism. It integrates fume treatment with the kitchen workspace, creating a spacious, clean, and high-quality cooking environment while efficiently removing smoke.

[0035] In an alternative embodiment, such as Figure 2 As shown, the air intake assembly 100 includes a housing 10 and a flap 20, the flap 20 being able to be in a retracted state and as... Figure 1 and Figure 2 The extension state is shown in the diagram. When the flap 20 is in the retracted state, it can be well hidden in the housing 10, and the range hood can be well hidden in the cabinet, ensuring the aesthetics of the kitchen environment. Figure 1 and Figure 2 As shown, when the flap 20 is in the extended state, the flap 20 can form a certain smoke-gathering area U, thereby achieving a better smoke extraction effect for the hidden range hood.

[0036] The existing air intake assembly 100 also includes a linear drive device. The housing 10 has an air inlet 18. The linear drive device can drive the flap 20 to open or block the air inlet 18. The flap 20 is rotatably connected to the housing 10. One end of the linear drive device is rotatably connected to the housing 10, and the other end of the linear drive device is rotatably connected to the flap 20. The linear drive device can drive the flap 20 to open or block the air inlet 18. Due to the limitation of the extension and retraction of the linear drive device itself and the limitation of the small overall space of the air intake assembly 100, the maximum opening angle of the flap 20 is small, which affects the oil fume treatment device 1000's oil fume extraction effect.

[0037] To solve the above problems, such as Figure 1 and Figure 2 As shown, the fan assembly 200 includes a housing 10, a flap 20, a drive mechanism 60, and a linkage assembly 40. The housing 10 has an air inlet 18. The flap 20 is rotatably connected to the housing 10 at a first position E. The flap 20 can flip from a blocked state (blocking the air inlet 18) to an extended state (opening the air inlet 18). The drive mechanism 60 is movably connected to the housing 10. The linkage assembly 40 is rotatably connected to the flap 20. The linkage assembly 40 is rotatably connected to the housing 10 at a second position A and a third position C. When the flap 20 is in a blocked state, the second position A, the third position C, and the first position E are arranged sequentially along the opening direction of the flap 20. When the flap 20 is in an extended state, the third position C, the second position A, and the first position E are arranged sequentially along the opening direction of the flap 20.

[0038] First, such as Figure 4 As shown, through the setting of the linkage assembly 40, when the flap 20 is in the extended state, the linkage assembly 40 is in the unfolded state. The linkage assembly 40 in the unfolded state is relatively long. The longer linkage assembly 40 can amplify the maximum opening angle of the flap 20, that is, the linkage assembly 40 amplifies the maximum opening angle through transmission.

[0039] Secondly, the line connecting the second position A and the third position C is the first connecting line M1. During the process of switching the flap 20 from the blocking state to the extending state, the angle by which the first connecting line M1 rotates around the third position C is the first flip angle γ. The first flip angle γ is positively correlated with the maximum opening angle of the flap 20. Figure 4 As shown, when the flap 20 is in the blocked state, the second position A, the third position C, and the first position E are arranged sequentially along the opening direction of the flap 20; as Figure 2 As shown, when the flap 20 is in the extended state, the third position C, the second position A, and the first position E are arranged sequentially along the opening direction of the flap 20.

[0040] Combination Figure 2 , Figure 4 and Figure 5 In the structure shown, during the transition from the blocked state to the extended state, the third position C of the flap 20 moves from the front side of the second position A to the rear side of the second position A. The position transition range of the third position C is relatively large, meaning that the first rotation angle γ of the first connecting line M1 is relatively large, resulting in a larger maximum opening angle of the flap 20. It should be noted that although existing fume treatment devices 1000 have the flap 20 and housing 10 connected by a connecting rod assembly 40, the position transition range of the third position C of the existing connecting rod assembly 40 is relatively small during the transition from the blocked state to the extended state. This results in a smaller first rotation angle γ, and therefore a smaller maximum opening angle of the flap 20 in existing fume treatment devices 1000.

[0041] Then, as Figure 1 and Figure 2 As shown, by positioning the first position E relatively forward, the flap 20 is positioned relatively forward due to the limited overall space of the air intake assembly 100. On one hand, the overall height of the flap 20 is relatively large; on the other hand, when the flap 20 is extended, it is positioned further forward. In summary, when the flap 20 is extended, the smoke-collecting area U formed by the flap 20 can be effectively increased, thereby effectively improving the overall smoke extraction effect of the fume treatment device 1000.

[0042] In summary, the fume treatment device 1000, through the coordinated and synergistic effects of "the linkage assembly 40 amplifies the maximum opening angle", "the position switching range of the third position C is large to increase the maximum opening angle of the flap 20", "the first position E is relatively forward to increase the overall height of the flap 20", and "the first position E is relatively forward to make the flap 20 set forward as a whole", can effectively expand the size of the smoke collection area U formed by the flap 20, and achieve a better fume extraction effect.

[0043] It should be noted that the maximum opening angle refers to the angle through which the flap 20 rotates from the completely closed air inlet 18 to the maximum limit position (i.e., the extended state) that is allowed to be opened by the design.

[0044] It should be noted that, as Figure 2 As shown, the flap 20 includes a bottom end G, such as Figure 12 As shown, the flap 20 includes an upper end face 213, and the height of the flap 20 refers to the vertical distance between the bottom end G of the flap 20 and the upper end face 213.

[0045] Specifically, such as Figure 1 and Figure 2As shown, in this embodiment of the present disclosure, the flap 20 is rotatably connected to the front side of the housing 10 at the first position E. The connecting rod assembly 40 can cause the flap 20 to flip towards the front side of the housing 10 to open the air inlet 18. The first position E is located in front of the second position A. That is to say, "along the opening direction of the flap 20" is the direction from back to front. In the following text, this embodiment of the present disclosure will be described using the oil fume treatment device 1000 with this configuration as an example.

[0046] In other alternative embodiments, the flap 20 can be rotatably connected to the left side of the housing 10 at the first position E, and the linkage assembly 40 can cause the flap 20 to flip toward the left side of the housing 10 to open the air inlet 18. The first position E is located to the left of the second position A, that is, "along the opening direction of the flap 20" is the direction from right to left.

[0047] In other alternative embodiments, the flap 20 can be rotatably connected to the right side of the housing 10 at the first position E, and the linkage assembly 40 can cause the flap 20 to flip toward the right side of the housing 10 to open the air inlet 18. The first position E is located to the right of the second position A, that is, "along the opening direction of the flap 20" is the direction from left to right.

[0048] In other alternative embodiments, the flap 20 can be rotatably connected to the rear side of the housing 10 at a first position E, and the linkage assembly 40 can cause the flap 20 to flip toward the rear side of the housing 10 to open the air inlet 18. The first position E is located behind the second position A, that is, "along the opening direction of the flap 20" is the direction from front to back.

[0049] Of course, the flap 20 can be rotatably connected to other sides of the housing 10 at the first position E, such as the left rear side, the right front side, etc. The connection method between the flap 20 and the housing 10 at any position is within the protection scope of this application, and the embodiments disclosed herein will not be described in detail.

[0050] As modern kitchen renovations trend towards minimalist styles and integrated designs, concealed range hoods have become an important category in the kitchen appliance industry due to their advantages such as complete integration into wall cabinets, space-saving design, and visually seamless appearance. When the fume treatment device 1000 is a concealed range hood, from the perspective of the smoke collection effect of the flap 20, the larger the maximum opening angle of the flap 20 and the longer the height of the flap 20, the better the smoke collection effect of the concealed range hood in working state. However, an excessively large flap 20 will increase weight, affecting the durability and reliability of the drive mechanism 60 and the connecting rod assembly 40. An excessively large flap 20 will also obstruct the user's view, thus affecting the cooking effect.

[0051] Furthermore, the installation depth of the wall cabinet is closely related to the longitudinal depth (i.e., the dimension along the front-to-back direction) of the air intake component 100. The installation depth of the wall cabinet needs to be compatible with the longitudinal depth of the air intake component 100 to meet the installation requirements of the concealed range hood. The longitudinal depth of the air intake component 100 is constrained by the height of the flap 20. The longitudinal depth of the air intake component 100 cannot exceed the height of the flap 20. If the height of the flap 20 exceeds the longitudinal depth of the air intake component 100, the flap 20 will not be completely concealed in the wall cabinet when the concealed range hood is not in operation. Since the current trend is that the installation depth of the wall cabinet should be as small as possible, from the perspective of wall cabinet installation, the longitudinal depth of the air intake component 100 and the height of the flap 20 should be as small as possible, which will seriously affect the smoke extraction effect of the concealed range hood.

[0052] Furthermore, existing side-draft or top-draft range hoods, in order to increase the maximum opening angle of the flap 20, have the top of the flap 20 moving forward and upward relative to the housing 10 during opening. Since the entire concealed range hood needs to be hidden in the cabinet and installed as close to the cabinet as possible, the concealed range hood cannot be designed with a flap 20 like that of a side-draft or top-draft range hood. If the flap 20 of the concealed range hood were designed with the top moving forward and upward, it would cause interference between the flap 20 and the cabinet. Therefore, the flap 20 of the concealed range hood cannot adopt a structure similar to that of a side-draft or top-draft range hood, i.e., a structure where the top of the flap 20 moves forward and upward. Existing concealed range hoods cannot achieve an increase in the maximum opening angle of the flap 20, and the maximum opening angle that the flap 20 of the concealed range hood can open is generally small, affecting the smoke extraction effect of the concealed range hood.

[0053] Therefore, existing concealed range hoods cannot achieve a multi-dimensional unified effect of small depth, efficient smoke removal, durable and reliable drive system, and ideal cooking results.

[0054] like Figure 1 and Figure 2As shown, the concealed smoke hood in this embodiment of the present disclosure achieves a large maximum opening angle through the coordinated and synergistic design of "the linkage assembly 40 amplifies the maximum opening angle", "the position switching range of the third position C is large to increase the maximum opening angle of the flap 20", "the first position E is relatively forward to increase the overall height of the flap 20", and "the first position E is relatively forward to make the flap 20 set forward as a whole". Under the premise that the top of the flap 20 does not change position, that is, under the premise that the top of the flap 20 does not move forward and upward with the opening of the flap 20, the flap 20 can achieve a large maximum opening angle, effectively expanding the size of the smoke collection area U formed by the flap 20. Even if the height of the flap 20 is relatively short, the concealed smoke hood can achieve a high-efficiency smoke purification effect due to the large maximum opening angle of the flap 20. Furthermore, the relatively short height of the flap 20 significantly reduces its weight, thereby alleviating the load on the drive mechanism 60 and the linkage assembly 40 and significantly improving the long-term reliability of the entire drive system. Secondly, the shorter height of the flap 20 provides a wider cooking view, allowing the user to see the food's condition clearly and ensuring ideal cooking results. Thirdly, the relatively short height of the flap 20 effectively reduces the depth of the air intake assembly 100, allowing the range hood to be fully integrated into the wall cabinets, saving space and providing a smooth visual appearance, thus meeting the trend of modern kitchen design towards a minimalist style and integrated design.

[0055] In summary, the concealed range hood of this embodiment, through the coordinated and synergistic design of "the linkage assembly 40 amplifies the maximum opening angle", "the position switching range of the third position C is large to increase the maximum opening angle of the flap 20", "the first position E is relatively forward to increase the overall height of the flap 20", and "the first position E is relatively forward to make the flap 20 set forward as a whole", can break the limitations of traditional range hoods and truly achieve the multi-dimensional unity of the concealed range hood's small depth, strong suction, reliable drive and ideal cooking.

[0056] In an alternative embodiment, such as Figures 2-5 As shown, the first flip angle γ is positively correlated with the maximum opening angle of the flap 20. The first flip angle γ is greater than or equal to 90°, so the maximum opening angle of the flap 20 is greater than or equal to 90°, which can effectively expand the size of the smoke collection area U formed by the flap 20 and achieve a better smoke extraction effect of the oil fume treatment device 1000.

[0057] For example, the first flip angle γ can be 90°, 92°, 100°, 140°, 150°, 160°, 170°, etc. The angles of the first flip angle γ within the range of 90° or greater are all within the protection scope of this optional embodiment, and this optional embodiment will not be described in detail one by one.

[0058] In an alternative embodiment, such as Figure 2 and Figure 4 As shown, during the switching between the blocking state and the extended state, the third position C, the second position A, and the first position E of the flap 20 are arranged from top to bottom. This avoids the third position C being too low, which would cause at least part of the drive mechanism 60 to be in a position lower than the second position A. This can minimize the direct exposure of the drive mechanism 60 to the oil fumes, effectively avoid the movement jamming and abnormal noise of the drive mechanism 60 caused by oil stains adhering to it, and at the same time prevent external pollutants from entering the internal structure of the drive mechanism 60, significantly extending the service life of the drive mechanism 60.

[0059] In an alternative embodiment, such as Figure 2 and Figure 4 As shown, the linkage assembly 40 includes at least two linkages. The housing 10, the at least two linkages, and the flap 20 are sequentially rotatably connected end to end. Two adjacent linkages are rotatably connected at the fourth position B. Utilizing the transmission amplification effect of the at least two linkages, the drive mechanism 60 can achieve a super-large angle flip of the flap 20 with a very small stroke. It can achieve a good balance between the large smoke collection area U and the miniaturized flap 20, and is well adapted to the oil fume treatment device 1000 with a very small depth. The flap 20 can stably switch between the extended state with a large angle flip and the retracted state completely stored in the housing 10. The oil fume treatment device 1000 can take into account multiple effects such as low energy consumption, strong suction, and aesthetics.

[0060] In addition, such as Figure 2 As shown, the first position E is the first rotating shaft 30, and the connecting rod assembly 40 is rotatably connected to the flap 20 at the sixth position F. The sixth position F does not coincide with the first rotating shaft 30, that is, a large lever arm is formed between the first rotating shaft 30 and the sixth position. The drive mechanism 60 only needs to output a small driving force to achieve a good flipping and pushing effect on the flap 20.

[0061] Furthermore, due to the aforementioned structural design, the height of the flap 20 can be effectively reduced, which in turn reduces the weight of the flap 20. This further reduces the driving force required by the drive mechanism 60 to push the flap 20, thus further reducing the volume of the drive mechanism 60. A smaller drive mechanism 60 can achieve a better driving effect on the flap 20, further reducing the volume of the air intake assembly 100.

[0062] In summary, through the aforementioned design of the air intake component 100, the various structures influence and promote each other, effectively breaking through the limitations of traditional range hoods and truly achieving a multi-dimensional unity of concealed range hoods with small depth, strong suction, low energy consumption, reliable drive, and ideal cooking.

[0063] For example, such as Figure 2and Figure 4 As shown, at least two connecting rods include a first connecting rod 41 and a second connecting rod 42. The housing 10, the first connecting rod 41, the second connecting rod 42 and the flap 20 are rotatably connected end to end in sequence. The fume treatment device 1000 also includes a drive mechanism 60. One end of the drive mechanism 60 is rotatably connected to the housing 10 and the other end of the drive mechanism 60 is rotatably connected to the first connecting rod 41. The structure is simple and can realize the rapid assembly of the fume treatment device 1000.

[0064] It should be noted that this application only describes a structure that includes only the first link 41 and the second link 42. At least two links can also be three links, four links, five links, etc. The embodiments disclosed in this disclosure will not be described in detail.

[0065] In an alternative embodiment, such as Figure 2 and Figure 4 As shown, the drive mechanism 60 includes a drive body 61 and a push rod 62 that can move linearly relative to it. The drive body 61 is rotatably connected to the housing 10, and the push rod 62 is rotatably connected to the first connecting rod 41 at the third position C. When the flap 20 is in the extended state, the fourth position B is located below the push rod 62. The fourth position B is in a relatively low position, thereby achieving a larger angle of flipping of the flap 20. At the same time, when the flap 20 is in the blocked state, the fourth position B is located above the push rod 62. The fourth position B is in a position as high as possible, effectively utilizing the limited space of the housing 10 in the vertical direction. This allows for both a large angle of flipping of the flap 20 and the retraction of the connecting rod assembly 40 into the low housing 10, while minimizing the overall height of the fume treatment device 1000. In summary, this fume treatment device 1000 breaks through the limitations of traditional range hoods, truly achieving a multi-dimensional unity of small height (vertical direction), small depth (front and back direction), strong suction, reliable drive, and ideal cooking. That is, within the limited space of the oil fume treatment device 1000, it can achieve a strong oil fume extraction effect, reliable drive and ideal cooking.

[0066] In an alternative embodiment, such as Figure 2 and Figure 4As shown, when the flap 20 is in the blocked state, the fourth position B is above the second position A, and the fourth position B and the second position A are arranged along the opening direction of the flap 20, that is, the fourth position B is located above and behind the second position A. When the flap 20 is in the extended state, the fourth position B is below the second position A, and the second position A and the fourth position B are arranged along the opening direction of the flap 20, that is, the fourth position B is located below and in front of the second position A. After the flap 20 switches from the blocked state to the extended state, the fourth position B can switch from the position above and behind the second position A to the position below and in front of the second position A. The fourth position B moves from behind the second position A to in front of the second position A, which means that the flap 20 must swing around the first position E by a large obtuse angle. This "back-looping" path of the fourth position B directly transforms the linear stroke of the flap 20 into a large-angle flipping that far exceeds that of a conventional flat-push mechanism.

[0067] In an alternative embodiment, such as Figure 4 As shown, when the flap 20 is in the blocked state, the fourth position B is located above the second position A. The fourth position B and the second position A are arranged along the opening direction of the flap 20, that is, the fourth position B is located above and behind the second position A. In other words, when the linkage assembly 40 is stored in the housing 10, the fourth position B will not continue to move forward towards the second position A, which can prevent the fourth position B from moving to a higher position inside the housing 10. Even if the dimensions of the housing 10 in the vertical direction are small, it can prevent the linkage assembly 40 from interfering with the top plate 11 of the housing 10 during the retraction process.

[0068] In an alternative embodiment, such as Figures 2-6 As shown, the linkage assembly 40 can switch between a retracted state where the flap 20 blocks the air inlet 18 and an extended state where the flap 20 opens the air inlet 18. The retracted state and the extended state are the two states of the linkage assembly 40. The retracted state of the linkage assembly 40 corresponds to the blocking state of the flap 20, and the extended state of the linkage assembly 40 corresponds to the extending state of the flap 20.

[0069] In an alternative embodiment, such as Figure 4 As shown, when the flap 20 is in the blocking state, the linkage assembly 40 is in the retracted state and completely housed in the housing 10. The retracted linkage assembly 40 has an upper side 4131. The fourth position B is not higher than the upper side 4131. The fourth position B will not continue to move forward towards the second position A, thus preventing the fourth position B from moving to a higher position within the housing 10. Even if the dimensions of the housing 10 in the vertical direction are small, interference between the linkage assembly 40 and the top plate 11 of the housing 10 can be avoided during the retraction process.

[0070] By utilizing the relative positional relationship between the fourth position B and the second position A, the flap 20 can be rotated at a large angle, while the connecting rod assembly 40 can be retracted into the low housing 10, minimizing the overall height of the fume treatment device 1000. In its non-operating state, the fume treatment device 1000 achieves a minimized overall height, allowing it to be well-integrated into cabinets. When in operation, the flap 20 can be rotated at a large angle to create a large smoke-collecting area U, achieving a strong suction effect on fumes and preventing smoke escape.

[0071] In summary, the fume treatment device 1000 breaks through the limitations of traditional range hoods, truly achieving a multi-dimensional unity of small height (vertical direction), small depth (front and back direction), strong suction, reliable operation, and ideal cooking. That is, within the limited overall space of the fume treatment device 1000, it effectively expands the smoke collection area U, achieving strong fume extraction, reliable operation, and ideal cooking.

[0072] In an alternative embodiment, such as Figure 9 As shown, when the connecting rod assembly 40 is in the retracted state, the second straight segment 413 extends horizontally, and the flap 20 extends horizontally and is not lower than the lowest end of the housing 10. The vertical dimension between the upper side 4131 of the second straight segment 413 and the front surface 211 of the flap 20 is the second distance S2, and the depth of the inner cavity 14 of the housing 10 is the third distance S3, where 0.8×S3≤S2≤S3. When the connecting rod assembly 40 is in the retracted state, the flap 20 can be concealed and stored. The retracted connecting rod assembly 40 can make maximum use of the vertical space inside the housing 10, and the smaller height of the housing 10 can achieve a better storage effect for the retracted connecting rod assembly 40. This fume treatment device 1000 can break the limitations of traditional range hoods and truly achieve a multi-dimensional unity of small height (vertical direction), small depth (front and back direction), strong suction, reliable drive, and ideal cooking. That is, within the limited space of the oil fume treatment device 1000, the smoke collection area U is effectively expanded, which can achieve a strong oil fume absorption effect, reliable drive and ideal cooking.

[0073] like Figures 2-6As shown, the second position A is the central axis of the second rotating shaft 50. The first connecting rod 41 is rotatably connected to the second connecting rod 42 at the fourth position B. The drive mechanism 60 is rotatably connected to the first connecting rod 41 at the third position C. The drive mechanism 60 is rotatably connected to the housing 10 at the fifth position D. The line connecting the second position A and the fourth position B is the second connecting line M2. When the connecting rod assembly 40 is in the retracted state, the third position C is located in front of the second connecting line M2, and the fifth position D is located behind the second connecting line M2. When the flap 20 is opened, along the opening direction of the flap 20, the path traversed by the fourth position B along the circumferential direction always leads the path traversed by the third position C along the circumferential direction. The drive mechanism 60 can achieve a super large angle flip of the flap 20 with a very small stroke, and can achieve a good balance between the large smoke collection area U and the miniaturized flap 20. It is perfectly adapted to the oil fume treatment device 1000 with a very small depth. The flap 20 can stably switch between the unfolded state with a large angle flip and the retracted state completely stored in the housing 10. The oil fume treatment device 1000 can take into account the multiple effects of low energy consumption, strong suction and the aesthetics of hidden storage.

[0074] In addition, such as Figure 5 and Figure 6 As shown, the collinear positions of the second position A, the third position C, and the fifth position D are the "dead point positions" of the linkage assembly 40. When the second position A, the third position C' (when in the "dead point position"), and the fifth position D' (when in the "dead point position") are collinear, the linkage assembly 40 is locked as a whole. Therefore, the first rotation angle γ rotated by the third position C when the linkage assembly 40 is in the retracted state and the third position C' (when in the "dead point position") determines the maximum opening angle of the flap 20. That is, the larger the first rotation angle γ is, the larger the maximum opening angle of the flap 20 is. When the linkage assembly 40 is in the retracted state, by "placing the third position C in front of the second connecting line M2 and the fifth position D behind the second connecting line M2", the first rotation angle γ can be effectively increased within the limited space of the housing 10, thereby effectively increasing the maximum opening angle of the flap 20.

[0075] Specifically, Figure 5 This is a schematic diagram of the linkage assembly 40 provided in this embodiment. The third position C is located in front of the second connecting line M2 (segment AB). The third position C is defined as follows: the linkage assembly 40 is in the retracted state, and the third position C' is defined as the linkage assembly 40 is in the "dead point position". The angle between the DC segment and the DC' segment of this application is the first rotation angle β, and the angle between the AC segment and the AC' segment of this application is the first flip angle γ. Figure 6 This is a schematic diagram of the linkage assembly 40 provided by existing technology, such as... Figure 6As shown, the third position C is set on the second connecting line M2 (segment AB). It is defined as follows: the third position C is when the linkage assembly 40 is in the retracted state; the third position C' is when the linkage assembly 40 is in the "dead point position." The angle between the prior art DC segment and the prior art DC' segment is the second rotation angle β', and the angle between the prior art AC segment and the prior art AC' segment is the second flip angle γ'. By designing the third position C to be located in front of the second connecting line M2 when the linkage assembly 40 is in the retracted state, when the first rotation angle β and the second rotation angle β' are approximately the same, the first flip angle γ can be much larger than the second flip angle γ', thereby effectively expanding the maximum opening angle of the flap 20. It should be noted that through the aforementioned structural design, the first flip angle γ can reach 2 to 3 times the second flip angle γ', and the maximum opening angle of the flap 20 of the air intake assembly 100 using the aforementioned structure can be 2 to 3 times the maximum opening angle of the flap 20 of the air intake assembly 100 using a conventional linkage design.

[0076] In an alternative embodiment, such as Figures 2-6 As shown, the length of the second connecting line M2 is the first length L1, and the length of the connecting line between the second position A and the third position C is the second length L2, where L2 < L1. A larger displacement (or rotational radius) of the fourth position B can be achieved by a smaller displacement (or rotational radius) of the third position C in segment AC. That is, a larger displacement (or rotational radius) of the fourth position B can be achieved by outputting a smaller displacement through the drive mechanism 60. Within the limited space of the housing 10, the first flip angle γ can be effectively increased. Furthermore, through the power transmission of the first link 41 and the second link 42, the flip plate 20 is driven to complete a large-angle flipping motion, thereby effectively increasing the maximum opening angle of the flip plate 20.

[0077] For example, L1 = (1.5~2.5) × L2, without excessively increasing the space required within the housing 10, effectively increases the first flip angle γ. Furthermore, through the power transmission of the first link 41 and the second link 42, the flap 20 is driven to complete a large-angle flipping motion, thereby effectively increasing the maximum opening angle of the flap 20. This truly achieves the combined effect of the small depth of the air intake component 100 and the large maximum opening angle of the flap 20, achieving a rare unity between the ultra-thin, stealthy installation of the air intake component 100 and the powerful physical smoke collection of the flap 20. In summary, this fume treatment device 1000 breaks through the limitations of traditional range hoods, truly achieving a multi-dimensional unity of small height (vertical direction), small depth (front and back direction), strong suction, reliable drive, and ideal cooking. That is, within the limited overall space of the fume treatment device 1000, the smoke collection area U is effectively expanded, achieving a strong smoke extraction effect, reliable drive, and ideal cooking.

[0078] In an alternative embodiment, such as Figure 7 and Figure 8 As shown, the housing 10 has a clearance hole 122, and the first connecting rod 41 passes through the clearance hole 122. When the connecting rod assembly 40 is moving, it can avoid interference between the connecting rod assembly 40 and the housing 10, and ensure the smooth movement of the connecting rod assembly 40.

[0079] In an alternative embodiment, such as Figure 7 and Figure 8 As shown, the first connecting rod 41 includes a first straight segment 411, an arc-shaped transition segment 412, and a second straight segment 413 connected in sequence. Second position A and third position C are located on the first straight segment 411, and fourth position B is located on the second straight segment 413. The first straight segment 411 and the second straight segment 413 are set at an angle. The arc-shaped transition segment 412 protrudes away from the second position A. When the flap 20 is in the unfolded state, the front side of the arc-shaped transition segment 412 can be positioned as close as possible to the rear of the housing 10. When the first connecting rod 41 passes through the housing 10, the front position of the clearance hole 122 on the housing 10 can be moved rearward, effectively reducing the length of the clearance hole 122. On the one hand, this significantly reduces the amount of oil fumes entering the housing 10 through the clearance hole 122, preventing corrosion of the internal mechanisms of the housing 10 and avoiding the accumulation of oil stains that could cause jamming of the internal mechanisms. On the other hand, it effectively prevents personal injury caused by the user's fingers being inserted into the housing 10 due to the clearance hole 122 being too large.

[0080] In an alternative embodiment, such as Figure 8 As shown, the housing 10 also includes a sealing member 17, which is sealed in the clearance hole 122. On the one hand, the sealing member 17 can significantly reduce the erosion of the internal mechanism of the air intake assembly 100 by oil fumes through the clearance hole 122, and avoid the component jamming caused by the accumulation of oil stains. On the other hand, it can effectively prevent personal injury caused by fingers being inserted into the mechanism through the clearance hole 122, and effectively improve the safety of the use of the oil fume treatment device 1000.

[0081] In an alternative embodiment, such as Figure 7 As shown, from the first straight segment 411 to the second straight segment 413, the width of the arc transition segment 412 gradually decreases. By setting the arc transition segment 412, a smooth transition from the first straight segment 411 to the second straight segment 413 can be achieved, avoiding stress concentration at the connection points of the first connecting rod 41 at different segments, preventing the first connecting rod 41 from breaking at the connection points of different segments, and ensuring that the first connecting rod 41 has a long service life while transmitting strong support force, thereby achieving stable support for the flap 20.

[0082] In an alternative embodiment, such as Figure 4 and Figure 7As shown, the arc transition section 412 includes an outer arc 4121, wherein the outer arc 4121 is a circular arc. While ensuring that the housing 10 is relatively small in the vertical direction, it can also avoid interference between the first link 41 and the housing 10 during the movement, thus achieving a compact design of the housing 10 and the link assembly 40.

[0083] In an alternative embodiment, such as Figure 4 and Figure 7 As shown, from the first straight line segment 411 to the second straight line segment 413, the radius of curvature ρ of the outer arc 4121 gradually decreases. Under the premise of avoiding interference between the first connecting rod 41 and the housing 10 within the limited space of the housing 10, the size of the arc transition segment 412 can be effectively reduced, the weight of the first connecting rod 41 can be effectively reduced, and the lightweight design of the connecting rod assembly 40 can be achieved. This further reduces the energy consumption and volume of the drive mechanism 60. The various structures influence and promote each other, which can effectively break the limitations of the traditional fume treatment device 1000 and truly achieve the multi-dimensional unity of the fume treatment device 1000 in terms of small depth, strong suction, low energy consumption, reliable drive and ideal cooking.

[0084] In an alternative embodiment, such as Figure 2 , Figure 4 and Figure 7 As shown, when the flap 20 is in the blocked state, the fourth position B is located above the first straight segment 411; when the flap 20 is in the extended state, the fourth position B is located below the first straight segment 411. After the flap 20 switches from the blocked state to the extended state, the fourth position B can switch from the position above the first straight segment 411 to the position below the first straight segment 411. The fourth position B moves from behind the second position A to the front of the second position A, which means that the flap 20 must swing around the first position E at a large obtuse angle. This "back-walking" path of the fourth position B directly transforms the linear stroke of the flap 20 into a large-angle flipping that far exceeds that of a conventional flat-push mechanism.

[0085] In an alternative embodiment, such as Figure 2 , Figure 7 and Figure 9 As shown, the arc transition section 412 and the second straight section 413 have a first outer contour point Q at the connection position, and the second straight section 413 has a second outer contour point M corresponding to the fourth position B. When the connecting rod assembly 40 is in the retracted state, the first outer contour point Q and the second outer contour point M are both located below the top plate 11 of the housing 10 and on the same horizontal plane. This ensures that the connecting rod assembly 40 is effectively housed in the housing 10, which has a smaller size in the vertical direction, while also ensuring that the length of the first connecting rod 41 is larger. This allows the flap 20 to have a larger maximum opening angle, truly achieving a multi-dimensional unity of a smaller height design and a stronger fume extraction effect for the fume treatment device 1000.

[0086] In an alternative embodiment, such as Figure 9 As shown, when the connecting rod assembly 40 is in the retracted state, the distance between the first outer contour point Q and the top plate 11 is the first distance S1, and the width of the second straight segment 413 is the first width D1, where 0≤S1≤0.5D1. The top of the retracted connecting rod assembly 40 can be relatively close to the top plate 11, thereby maximizing the use of the vertical space inside the housing 10. The relatively small height of the housing 10 can achieve a better storage effect for the retracted connecting rod assembly 40. In this type of oil fume treatment device 1000, the flap 20 can stably switch between an extended state with a large angle of rotation and a retracted state completely stored in the housing 10. The oil fume treatment device 1000 can achieve multiple effects such as low energy consumption, strong suction, and aesthetically pleasing concealed storage. In summary, the fume treatment device 1000 breaks through the limitations of traditional range hoods, truly achieving a multi-dimensional unity of small height (vertical direction), small depth (front and back direction), strong suction, reliable operation, and ideal cooking. That is, within the limited overall space of the fume treatment device 1000, it effectively expands the smoke collection area U, achieving strong fume extraction, reliable operation, and ideal cooking.

[0087] In an alternative embodiment, such as Figure 3 and Figure 4 As shown, the flap 20 is rotatably connected to the housing 10 at the first position E. The central axis C1 of the first rotating shaft 30 is the sixth position F. The length of the line connecting the first position E and the sixth position F is the third length L3. The length of the line connecting the second position A and the first position E is the fourth length L4. The length of the line connecting the fourth position B and the sixth position F is the fifth length L5. Among them, L1+L3<L4+L5. The AE segment is the housing 10, the EF segment and the AB segment are rockers, and the BF segment is a connecting rod. ABFE forms an irregular double rocker mechanism. When the irregular double rocker mechanism satisfies "L1+L3<L4+L5", the relative motion of all components of the irregular double rocker mechanism is restricted to a specific swing range. Continuous unidirectional rotational motion cannot be achieved, so that the rocker only swings at a limited angle and cannot rotate a full circle. Structurally, this eliminates the risk of overtravel and inertial rotation, effectively improving the motion safety and positioning accuracy of the connecting rod assembly 40, and precisely controlling the movement range and swing angle amplitude of the flap 20 from a physical structure perspective. On the one hand, it prevents the flap 20 from overtraveling during the opening process, thus preventing the risk that the flap 20 may not be able to rotate back later; on the other hand, it prevents the flap 20 from overtraveling during the closing process, thus preventing interference between the linkage assembly 40 and the housing 10. In summary, the design of the irregular double rocker mechanism can not only prevent the risk that the flap 20 may not be able to close, but also avoid the problem of the air intake assembly 100 being stuck due to interference between the linkage assembly 40 and the housing 10, ensuring that the fume treatment device 1000 is always in good working condition.

[0088] In an alternative embodiment, such as Figure 2 As shown, the linkage assembly 40 includes a limiting structure 43, which cooperates with the housing 10 to make the flap 20 at the maximum opening angle. The limiting structure 43 can achieve precise physical limitation on the maximum opening angle of the flap 20, which can prevent damage to the air intake assembly 100 caused by the overtravel operation of the drive mechanism 60, and ensure that the flap 20 can accurately stop at the preset working position every time it is opened, thereby improving the safety and consistency of the fume treatment device 1000.

[0089] In summary, through the design method of "L1+L3<L4+L5" and the design method of "limiting structure 43 and housing 10 cooperating with each other", the air intake component 100 is prevented from being damaged due to overtravel of drive mechanism 60 by the dual physical protection structure.

[0090] In an alternative embodiment, such as Figure 2 and Figure 3 As shown, the flap 20 has a bottom end G. The length of the line connecting the sixth position F and the bottom end G is the sixth length L6. The torque applied to the flap 20 by the second link 42 is the product of the component force perpendicular to the flap 20 and the third length L3. The component force perpendicular to the flap 20 decreases as the third length L3 increases. Therefore, the third length L3 cannot be too large or too small. In this embodiment, it is designed such that 1 / 3 ≤ L3 / L6 ≤ 2, which ensures that the third length L3 is at a moderate size. The third length L3 is neither too large nor too small, ensuring that the torque applied to the flap 20 by the second link 42 is relatively large, so that the flap 20 can reliably maintain the open position under the impact of high-speed airflow of oil fumes, avoid accidental closure during operation, ensure smooth smoke exhaust, overcome the increased mechanical resistance caused by grease adhesion after long-term use, and ensure that the opening and closing action of the flap 20 is stable and does not jam for a long time.

[0091] In an alternative embodiment, such as Figure 2 and Figure 3 As shown, the flap 20 is rotatably connected to the housing 10 at the first position E, and the connecting rod assembly 40 is rotatably connected to the flap 20 at the sixth position F. When the connecting rod assembly 40 is in the unfolded state, the sixth position F, the first position E, the fourth position B, the second position A, and the third position C are arranged from front to back, and the third position C, the second position A, the first position E, the fourth position B, and the sixth position F are arranged from top to bottom. This allows the first connecting rod 41 and the second connecting rod 42 to be in the fully unfolded state, so that the flap 20 is at a larger maximum opening angle, increasing the air intake area, improving the smoke exhaust efficiency, avoiding turbulence, reducing wind noise, forming an effective airflow guide and smoke collection, and preventing oil fume overflow.

[0092] In an alternative embodiment, such as Figure 4 and Figure 9As shown, when the linkage assembly 40 is in the retracted state, the flap 20 extends horizontally and is not lower than the lowest end of the housing 10. The housing 10 has an inner cavity 14, and the first rotating shaft 30 is completely hidden in the inner cavity 14. When the linkage assembly 40 is in the retracted state, the flap 20 and the first rotating shaft 30 can be completely hidden in the inner cavity 14. In addition, the first rotating shaft 30 is always completely hidden in the inner cavity 14, forming a concealed anti-oil fume transmission fulcrum. The first rotating shaft 30 is not exposed in the oil fume area, effectively reducing the probability of oil stains adhering to the first rotating shaft 30, avoiding jamming of the first rotating shaft 30, and ensuring flexible switching of the flap 20 in different positions.

[0093] In an optional embodiment, when the flap 20 is in the blocked state, the front surface 211 of the flap 20 is flush with the outer surface of the housing 10. First, when the flap 20 is in the blocked state, the flap 20 and the housing 10 are integrated, resulting in a smooth and flat appearance without stepped breaks, significantly improving the overall texture and visual unity of the fume treatment device 1000. Second, the front surface 211 being flush with the outer surface of the housing 10 effectively prevents oil stains and water stains from accumulating in the step gaps, allowing the cloth to be wiped without obstruction during cleaning, greatly reducing the risk of oil and water accumulation. It reduces the difficulty of daily maintenance and eliminates hygiene dead corners; secondly, it eliminates the protruding edges between the flap 20 and the housing 10, making the outer surface of the whole machine smooth and rounded, avoiding bumps or scratches caused by protruding edges during operation or wiping, and improving the safety of use; finally, when the flap 20 is in the blocked state, the front surface 211 of the flap 20 is coplanar with the outer surface of the housing 10, which can reduce the interference of the overall external unevenness of the fume treatment device 1000 on the surrounding airflow, and help maintain the stability of the negative pressure area inside the fume treatment device 1000.

[0094] In an alternative embodiment, such as Figure 2 As shown, the first rotating shaft 30 is located at the front and lower part of the inner cavity 14. When the connecting rod assembly 40 is in the unfolded state, the flap 20 can be positioned at the front and lower part of the housing 10, effectively expanding the size of the smoke-collecting area U formed by the flap 20 and effectively improving the smoke extraction effect of the fume treatment device 1000. In other words, even if the size of the housing 10 in the front-to-back direction is small, by moving the first rotating shaft 30 forward, the size of the smoke-collecting area U formed by the flap 20 can be expanded to a certain extent, truly achieving the multi-dimensional unity of the fume treatment device 1000 in terms of small depth, strong suction, low energy consumption, reliable drive, and ideal cooking.

[0095] Specifically, such as Figure 1 and Figure 10As shown, the distance along the front-rear direction of the housing 10 is the fourth distance S4. The housing 10 also includes a rear baffle 16, which has a rear side 161. The fourth distance S4 is the distance between the front side 151 and the rear side 161 along the front-rear direction. The first rotating shaft 30 has a central axis C1. The distance between the central axis C1 and the front side 151 of the housing 10 along the front-rear direction is the fifth distance S5. Wherein, max (10mm, S4 / 33) ≤ S5 ≤ min (S4 / 13, 25mm). The housing 10 with different fourth distances S4 can dynamically calculate the appropriate fifth distance S5 according to the aforementioned formula, thereby achieving matching of the first rotating shaft 30 in a suitable position for different models of housing 10. The corresponding first rotating shaft 30 can be set as far forward as possible, effectively expanding the space size of the smoke collection area U formed by the flip plate 20, effectively improving the smoke extraction effect of the oil fume treatment device 1000, and truly achieving the multi-dimensional unity of the oil fume treatment device 1000 with small depth, strong suction, low energy consumption, reliable drive and ideal cooking. That is, within the limited space of the oil fume treatment device 1000, the smoke collection area U is effectively expanded, which can achieve a strong oil fume absorption effect, reliable drive and ideal cooking.

[0096] In an alternative embodiment, such as Figure 6 As shown, the housing 10 includes a front baffle 15 with a lower end face 152, a first rotating shaft 30 with a central axis C1, a radius of a first radius R1, a central axis C1 parallel to the lower end face 152, and a vertical distance S6 between the central axis C1 and the lower end face 152, where R1≤S6≤10mm. The first rotating shaft 30 is positioned low and can be well concealed within the housing 10. When the connecting rod assembly 40 is in the extended state, the flap 20 is positioned low within the housing 10, effectively expanding the size of the smoke-collecting area U formed by the flap 20. This significantly improves the smoke extraction effect of the fume treatment device 1000, truly achieving a multi-dimensional unity of small depth, strong suction, low energy consumption, reliable operation, and ideal cooking within the limited overall space of the fume treatment device 1000. In other words, by effectively expanding the smoke-collecting area U within the limited overall space of the fume treatment device 1000, a strong smoke extraction effect, reliable operation, and ideal cooking can be achieved.

[0097] In an alternative embodiment, such as Figure 10 and Figure 11As shown, the flap 20 includes a front surface 211, a rear surface 212, and an upper surface 213 disposed between the two. The first rotating shaft 30 is disposed on at least part of the upper surface 213. During the opening process, the flap 20 can avoid interference between the flap 20 and the housing 10 to the greatest extent, and can avoid the maximum opening angle of the flap 20 being too small due to interference between the flap 20 and the housing 10. Through this structure, the maximum opening angle of the flap 20 can be effectively improved. When the flap 20 is opened, the leading edge of the air inlet formed by the flap 20 can be opened to a more forward position, so that the air inlet is closer to the smoke source of the stove, shortening the oil fume diffusion path and improving the smoke extraction effect.

[0098] For example, such as Figure 10 and Figure 11 As shown, the first rotating shaft 30 has a central longitudinal section Z1 parallel to the front surface 211. The central longitudinal section Z1 is located between the front surface 211 and the rear surface 212 along the front-rear direction. The upper end surface 213 can provide stable support for the first rotating shaft 30.

[0099] In an alternative embodiment, such as Figure 11 and Figure 12 As shown, the front surface 211 is parallel to the rear surface 212 and perpendicular to the upper end surface 213. The upper end surface 213 includes a mounting plate 2131 and a free end plate 2132. The first rotating shaft 30 is located at the upper end of the mounting plate 2131. The first rotating shaft 30 has a tangent surface W that is parallel to the mounting plate 2131 and tangent to the outer peripheral surface of the first rotating shaft 30. The first rotating shaft 30 also has a central longitudinal section Z that is parallel to the mounting plate 2131. The free end plate 2132 is disposed between the tangent surface W and the central longitudinal section Z, which can prevent the free end plate 2132 from interfering with the housing 10 during the flipping process. It can also prevent the gap between the upper end surface 213 and the housing 10 from being too large, thus preventing the backflow of oil fumes and the leakage of odors. It can also prevent the high-speed airflow from being sucked in from the narrow space due to the large gap, thus preventing the generation of sharp whistling or howling sounds and significantly reducing the operating noise of the oil fume treatment device 1000.

[0100] like Figure 10As shown, the height of the flap 20 is the flap height H. In summary, through the aforementioned arrangement and cooperation of various components, the fume treatment device 1000 of this embodiment can achieve the following effects: 300mm≤S4≤400mm, H≤S4. When the connecting rod assembly 40 is in the unfolded state, the flap 20 and its rear horizontal plane Y form a first included angle α, 120°≤α≤160°. The fume treatment device 1000 of this embodiment can break through the limitations of traditional range hoods and truly achieve a multi-dimensional unity of small depth, strong suction, reliable drive, and ideal cooking. That is, based on the limited space of the fume treatment device 1000, the smoke collection area U is effectively expanded, which can achieve a strong smoke suction effect, reliable drive, and ideal cooking.

[0101] In an alternative embodiment, such as Figure 2 , Figure 13 and Figure 14 As shown, the linkage assembly 40 also includes a connector 44. The first link 41 and the limiting structure 43 are arranged at intervals in the left and right direction and connected by the connector 44. The second rotating shaft 50 passes through the first link 41 and the limiting structure 43 and is rotatably connected to the housing 10. Since the limiting structure 43, the first link 41 and the connector 44 together form a structure that is rotatably connected to the housing 10, the limiting structure 43, the first link 41 and the connector 44 together have high strength and hardness. The overall structure of the limiting structure 43, the first link 41 and the connector 44 can achieve stable support for the second rotating shaft 50, realize a better and more stable rotatable connection between the linkage assembly 40 and the housing 10, and further improve the transmission stability and reliability of the entire flap 20.

[0102] In an alternative embodiment, such as Figure 2 , Figure 13 and Figure 14 As shown, the limiting structure 43, the first connecting rod 41, and the connecting piece 44 can be integrated into a single structure through punching and bending of sheet metal. This facilitates rapid installation of the integrated structure with the drive mechanism 60, the housing 10, and other structures, effectively improving the assembly efficiency of the air intake assembly 100. Furthermore, bending allows for work hardening, further enhancing the strength and rigidity of the integrated structure, thereby improving its support for the second rotating shaft 50, extending its service life, and further improving the transmission stability and reliability of the flap 20.

[0103] In an optional embodiment, protruding reinforcing structures may also be provided on the limiting structure 43, the first connecting rod 41, and the connecting member 44, thereby further improving the strength and hardness of the integrated structure, further improving the support effect on the second rotating shaft 50, further improving the service life of the integrated structure, and further improving the transmission stability and reliability of the flip plate 20.

[0104] In an alternative embodiment, such as Figure 2 , Figure 13 and Figure 14 As shown, the housing 10 includes a housing body and a support plate 12 disposed thereon. The connecting rod assembly 40 is rotatably connected to the support plate 12. The support plate 12 enhances the stability of the support for the second rotating shaft 50 and further improves the transmission stability and reliability of the flip plate 20.

[0105] In an alternative embodiment, such as Figure 2 , Figure 13 and Figure 14 As shown, the support plate 12 includes two first hinge seats 121, and the second rotating shaft 50 passes through the two first hinge seats 121. The two first hinge seats 121 are arranged at intervals in the left-right direction. The first connecting rod 41 and the limiting structure 43 are located between the two first hinge seats 121. The two first hinge seats 121 can accurately guide and stably support the rotation trajectory of the integrated structure. At the same time, the two outer surfaces of the integrated structure respectively contact and abut with the corresponding first hinge seats 121, which can effectively counteract the radial torque of the integrated structure, prevent the connecting rod assembly 40 from rotating or deviating during movement, and significantly improve the transmission stability, reliability and durability of the flap 20.

[0106] In an alternative embodiment, such as Figure 13 As shown, the second rotating shaft 50 includes a second rotating shaft body 51 and a limiting part 52. The second rotating shaft body 51 is sequentially inserted through the first first hinge seat 121, the first connecting rod 41, the limiting structure 43, and the second first hinge seat 121. One limiting part 52 is disposed at one end of the second rotating shaft body 51 and located outside the first first hinge seat 121, and the other limiting part 52 is disposed at the other end of the second rotating shaft body 51 and located outside the second first hinge seat 121. The provision of the two limiting parts 52 can prevent the connecting rod assembly 40 from detaching from the first hinge seat 121, significantly improving the transmission stability, reliability, and durability of the flap 20.

[0107] In an alternative embodiment, such as Figure 13 and Figure 14As shown, the flap 20 also includes a bushing 70, which is sleeved on the outer periphery of the second rotating shaft body 51 and located between the first connecting rod 41 and the limiting structure 43. One end of the bushing 70 abuts against the first connecting rod 41, and the other end of the bushing 70 abuts against the limiting structure 43. With this structure, the strength and hardness of the integrated structure can be further improved, the stability of the support for the second rotating shaft 50 can be enhanced, and the transmission stability and reliability of the flap 20 can be further improved.

[0108] In an alternative embodiment, such as Figure 13 and Figure 14 As shown, the flap 20 also includes a first shim 81, which is sleeved on the second rotating shaft 50. The first shim 81 is located between the first hinge seat 121 and the first connecting rod 41. By setting the first shim 81, the axial clearance between the integrated structure and the first hinge seat 121 can be adjusted to prevent noise caused by excessive clearance and to prevent jamming during the movement of the flap 20 due to insufficient clearance, thus effectively ensuring the good performance and long service life of the flap 20.

[0109] In an alternative embodiment, such as Figure 13 and Figure 14 As shown, the flap 20 also includes a second shim 82, which is sleeved on the second rotating shaft 50. The second shim 82 is disposed between the second first hinge seat 121 and the limiting structure 43. By setting the second shim 82, the axial clearance between the integrated structure and the first hinge seat 121 can be adjusted to prevent noise caused by excessive clearance and to prevent jamming during the movement of the flap 20 due to insufficient clearance, thus effectively ensuring the good performance and long service life of the flap 20.

[0110] In an alternative embodiment, such as Figure 14 As shown, the support plate 12 includes a limiting body 123, which cooperates with the limiting structure 43 to effectively limit the flap 20 at its maximum opening angle. For example, the limiting body 123 can be a reinforced structure formed by extrusion of the support plate 12. The limiting body 123 has good strength and hardness, and can provide good and stable support for the limiting structure 43.

[0111] In an alternative embodiment, such as Figure 2 , Figure 13 and Figure 14As shown, the drive mechanism 60 includes a drive body 61 and a push rod 62 capable of telescopic movement relative to it. The linkage assembly 40 also includes a second linkage 42. The drive body 61 is rotatably connected to the housing body, the flap 20 is rotatably connected to the support plate 12, and the support plate 12, the first linkage 41, the second linkage 42, and the flap 20 are sequentially rotatably connected. The push rod 62 is rotatably connected to the first linkage 41. During the telescopic movement of the push rod 62 relative to the drive body 61, the push rod 62 can drive the linkage assembly 40 to switch between a retracted state and an extended state, and the linkage assembly 40 can enable the flap 20 to switch between a retracted state and an extended state. For example, as shown... Figure 2 As shown, the flap 20 is rotatably connected to the housing 10 via the first rotating shaft 30, thereby enabling the flap 20 to flexibly flip relative to the housing 10.

[0112] In an alternative embodiment, such as Figure 13 and Figure 14 As shown, the push rod 62 includes a push rod body 621 and a mounting component 622 connected together. The mounting component 622 is disposed between the limiting structure 43 and the first connecting rod 41, and the mounting component 622 is rotatably connected to the limiting structure 43 and the first connecting rod 41 respectively through a third rotating shaft 90. The distance of the mounting component 622 in the left-right direction is a first dimension T1, and the maximum distance of the push rod body 621 in the left-right direction is a second dimension T2, where T1 > T2. The relatively wide mounting component 622 is adapted to and rotatably engages with the limiting structure 43 and the first connecting rod 41 respectively. During the movement of the push rod 62, the limiting structure 43 and the first connecting rod 41 can provide precise guidance and stable support for the rotation trajectory of the mounting component 622. Meanwhile, the left side of the mounting component 622 contacts and abuts against the surface of the first connecting rod 41, and the right side of the mounting component 622 contacts and abuts against the surface of the limiting structure 43. This effectively resists the torque borne by the mounting component 622, prevents the drive mechanism 60 from rotating or deviating during movement, and significantly improves the transmission stability, reliability and durability of the flap 20.

[0113] In addition, such as Figure 13 and Figure 14 As shown, the relatively narrow push rod body 621 can avoid interference with the limiting structure 43 or the first connecting rod 41 during movement. By optimizing the avoidance of the push rod body 621, the risk of movement interference can be further eliminated without changing the overall layout. This allows the entire flap 20 to achieve large-angle flipping while also making the arrangement of each component of the flap 20 compact. The flap 20 occupies less space overall, which is conducive to the miniaturization design of the entire fume treatment device 1000 and is suitable for smaller-sized fume treatment devices 1000.

[0114] In an alternative embodiment, such as Figure 15As shown, the push rod 62 also includes a movable part 623. The mounting part 622, the push rod body 621 and the movable part 623 are connected in sequence. The movable part 623 can move linearly relative to the drive body 61. The maximum distance of the movable part 623 in the left and right direction is the third dimension T3, where T3 > T2. The relatively wide movable part 623 can ensure the high strength and rigidity of the push rod 62 as a whole, so as to realize the push rod 62 can move in a better way relative to the drive body 61, and avoid the push rod 62 from bending or deforming during the movement.

[0115] In an alternative embodiment, such as Figure 16 As shown, the flap 20 includes a flap body 21 and a second hinge seat 22 disposed thereon. The second link 42 is rotatably connected to the second hinge seat 22. Through the cooperation between the second link 42 and the second hinge seat 22, the link assembly 40 can accurately drive the flap 20, ensuring that the flap 20 can smoothly and accurately switch between the retracted state and the extended state.

[0116] In an alternative embodiment, such as Figure 16 and Figure 17 As shown, the fume treatment device 1000 also includes a rotating assembly 300, which includes a fourth rotating shaft 310 and a fixing member 320. The fourth rotating shaft 310 includes a first rotating shaft body 3111 and a first limiting member 3112 connected to each other. The fixing member 320 includes a fixing part 321 and a second limiting member 322 connected to each other. The first rotating shaft body 3111 passes through the connecting rod assembly 40 and the second hinge seat 22. The fixing part 321 is connected to the first rotating shaft body 3111. The connecting rod assembly 40 and the second hinge seat 22 are restricted between the first limiting member 3112 and the second limiting member 322. By cooperating with the first limiting member 3112 and the second limiting member 322, the relative position of the second connecting rod 42 and the second hinge seat 22 along the axial direction (i.e., the left-right direction) can be restricted, preventing the second connecting rod 42 and the second hinge seat 22 from separating along the axial direction (i.e., the left-right direction), thus improving the durability of the flap 20. Meanwhile, the first rotating shaft body 3111 passes through the connecting rod assembly 40 and the second hinge seat 22, which can ensure smooth mutual rotation between the connecting rod assembly 40 and the second hinge seat 22.

[0117] In an alternative embodiment, such as Figure 17 As shown, the fixing part 321 is threadedly connected to the first rotating shaft body 3111, which enables quick assembly and disassembly of the fixing part 321 and the first rotating shaft body 3111, and enables quick assembly and disassembly of the second connecting rod 42, the second hinge seat 22 and the rotating assembly 300. The overall structure of the flip plate 20 is simple, compact and small in size.

[0118] For example, such as Figure 17 and Figure 18As shown, the rotating part 31112 includes a first threaded part 31113, and the fixing part 321 is provided with a second threaded part 3211. The first threaded part 31113 and the second threaded part 3211 are screwed together to realize the threaded connection between the rotating part 31112 and the fixing part 321, and to realize the quick assembly and disassembly of the first rotating shaft body 3111 and the fixing part 321.

[0119] In other alternative embodiments, the fixing part 321 and the first rotating shaft body 3111 can also be detachably connected by means of snap-fit ​​or other methods.

[0120] In an alternative embodiment, such as Figures 16-18 As shown, the first rotating shaft body 3111 includes an anti-detachment part 31111 and a rotating part 31112. The first limiting member 3112, the anti-detachment part 31111, and the rotating part 31112 are connected in sequence. The second connecting rod 42 is sleeved on the outer periphery of the anti-detachment part 31111 and is engaged with the anti-detachment part 31111. The rotating part 31112 is rotatably connected to the second hinge seat 22. The second connecting rod 42 and the second hinge seat 22 are spaced apart in the left and right direction, so that the second connecting rod 42 and the second hinge seat 22 can rotate through a preset distance to prevent friction noise and achieve silent use of the fume treatment device 1000 during the switching of working states. It can also avoid jamming of the flip plate 20 during the state switching process and ensure smooth switching of the flip plate 20 between different states. For example, as shown... Figure 17 As shown, the second hinge seat 22 has a second through hole 221, and the rotating part 31112 is inserted into the second through hole 221. The outer peripheral surface of the rotating part 31112 is spaced apart from the inner wall surface of the second through hole 221, which can ensure the smooth rotation of the second hinge seat 22 relative to the rotating part 31112.

[0121] For example, such as Figures 16-18 As shown, the first diameter N1 of the anti-detachment part 31111 is larger than the second diameter N2 of the rotating part 31112, which can form a shoulder between the anti-detachment part 31111 and the rotating part 31112. The second hinge seat 22 cooperates with the shoulder to limit the gap between the second connecting rod 42 and the second hinge seat 22 along the axial direction (i.e., the left and right direction). The structure is simple and easy to manufacture.

[0122] In an alternative embodiment, such as Figure 17 and Figure 18 As shown, a first through hole 421 is provided on the second connecting rod 42, and the anti-detachment part 31111 is inserted into the first through hole 421 and is interference-fitted with the inner wall surface of the first through hole 421, thereby realizing a stable connection between the second connecting rod 42 and the first rotating shaft body 3111.

[0123] In an alternative embodiment, such as Figure 17 and Figure 18As shown, a first through hole 421 is provided on the second connecting rod 42, and the anti-detachment part 31111 is inserted into the first through hole 421. The outer peripheral surface of the anti-detachment part 31111 is provided with a texture 311111, and the texture 311111 abuts against the inner wall surface of the first through hole 421, which can also achieve a stable connection between the second connecting rod 42 and the first rotating shaft body 3111.

[0124] In an alternative embodiment, such as Figure 17 As shown, the rotating assembly 300 also includes a third shim 330 and / or a fourth shim 340. The third shim 330 and the fourth shim 340 are sandwiched between the rotating part 31112 and the second limiting member 322. The third shim 330 and the fourth shim 340 can adjust the axial clearance and play, compensate for the cumulative error of machining and assembly, and prevent loosening, thereby further ensuring the smooth switching of the flip plate 20 between different states.

[0125] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An oil fume treatment device, characterized in that, include: The housing (10) has an air inlet (18); The flap (20) is rotatably connected to the housing (10) at the first position E. The flap (20) can be flipped from the blocked state of the air inlet (18) to the outside of the housing (10) to switch to the extended state of the air inlet (18) being open. The drive mechanism (60) is movably connected to the housing (10); as well as The linkage assembly (40) is rotatably connected to the flap (20), the linkage assembly (40) is rotatably connected to the housing (10) at the second position A, and the linkage assembly (40) is rotatably connected to the drive mechanism (60) at the third position C; When the flap (20) is in the blocked state, the second position A, the third position C and the first position E are arranged in sequence along the opening direction of the flap (20); When the flap (20) is in the extended state, the third position C, the second position A and the first position E are arranged in sequence along the opening direction of the flap (20).

2. The fume treatment device according to claim 1, characterized in that, The line connecting the second position A and the third position C is the first connecting line M1. During the process of switching the flap (20) from the blocking state to the extending state, the angle by which the first connecting line M1 rotates is the first flip angle γ, which is greater than or equal to 90°; and / or During the switching between the blocking state and the extending state, the third position C, the second position A, and the first position E of the flap (20) are arranged from top to bottom.

3. The fume treatment device according to claim 1, characterized in that, The linkage assembly (40) includes at least two linkages. The housing (10), the at least two linkages and the flap (20) are sequentially rotatably connected end to end. Two adjacent linkages are rotatably connected at the fourth position B.

4. The oil fume treatment device according to claim 3, characterized in that, When the flap (20) is in the blocked state, the fourth position B is located above the second position A, and the fourth position B and the second position A are arranged along the opening direction of the flap (20); when the flap (20) is in the extended state, the fourth position B is located below the second position A, and the second position A and the fourth position B are arranged along the opening direction of the flap (20); and / or The drive mechanism (60) is rotatably connected to the housing (10) at the fifth position D. The line connecting the second position A and the fourth position B is the second connecting line M2. When the flap (20) is in the blocking state, the fifth position D, the second connecting line M2, and the third position C are arranged along the opening direction of the flap (20); and / or The drive mechanism (60) includes a drive body (61) and a push rod (62) that can move linearly relative to it. The drive body (61) is rotatably connected to the housing (10), and the push rod (62) is rotatably connected to the linkage assembly (40) at the third position C. When the flap (20) is in the extended state, the fourth position B is located below the push rod (62). When the flap (20) is in the blocked state, the fourth position B is located above the push rod (62).

5. The fume treatment device according to claim 4, characterized in that, When the flap (20) is in the blocking state, the linkage assembly (40) is in the retracted state and completely housed in the housing (10). The linkage assembly (40) in the retracted state has an upper side (4131), and the fourth position B is not higher than the upper side (4131); and / or The line connecting the second position A and the third position C is the first line M1, the length of the second line M2 is the first length L1, and the length of the first line M1 is the second length L2, wherein L2 < L1.

6. The oil fume treatment device according to claim 3, characterized in that, The connecting rod rotatably connected to the housing (10) includes a first straight segment (411), an arc-shaped transition segment (412), and a second straight segment (413) connected in sequence. The second position A and the third position C are located on the first straight segment (411), and the fourth position B is located on the second straight segment (413). The first straight segment (411) and the second straight segment (413) are set at an angle, and the arc-shaped transition segment (412) protrudes in a direction away from the second position A.

7. The fume treatment device according to claim 6, characterized in that, From the first straight line segment (411) to the second straight line segment (413), the width of the arc-shaped transition segment (412) gradually decreases; and / or The arc-shaped transition segment (412) includes an outer arc (4121), wherein the outer arc (4121) is a circular arc; or, from the first straight line segment (411) to the second straight line segment (413), the radius of curvature ρ of the outer arc (4121) gradually decreases; and / or The arc-shaped transition section (412) and the second straight section (413) have a first outer contour point Q at their connection point, and the second straight section (413) has a second outer contour point M corresponding to the fourth position B. When the flap (20) is in the blocking state, the first outer contour point Q and the second outer contour point M are both located below the top plate (11) of the housing (10) and on the same horizontal plane; and / or When the flap (20) is in the blocked state, the fourth position B is located above the first straight segment (411); when the flap (20) is in the extended state, the fourth position B is located below the first straight segment (411).

8. The fume treatment device according to claim 7, characterized in that, When the flap (20) is in the blocked state, the distance between the first outer contour point Q and the top plate (11) is the first distance S1, and the width of the second straight segment (413) is the first width D1, where 0≤S1≤0.5D1; and / or When the flap (20) is in the blocked state, the second straight segment (413) extends horizontally, the flap (20) extends horizontally and is not lower than the lowest end of the housing (10), the upper side (4131) of the second straight segment (413) and the front surface (211) of the flap (20) are a second distance S2 in the vertical direction, and the depth of the inner cavity (14) of the housing (10) is a third distance S3, wherein 0.8×S3≤S2≤S3; and / or When the flap (20) is in the blocked state, the front surface (21) of the flap (20) is flush with the outer surface of the housing (10).

9. The fume treatment device according to claim 3, characterized in that, The linkage assembly (40) is rotatably connected to the flap (20) at the sixth position F, and the length of the line connecting the first position E and the sixth position F is the third length L3; wherein, the length of the line connecting the second position A and the first position E is the fourth length L4, and the length of the line connecting the fourth position B and the sixth position F is the fifth length L5; wherein: L1+L3<L4+L5; or, wherein, the flap (20) has a bottom end G, and the length of the line connecting the sixth position F and the bottom end G is the sixth length L6, wherein 1 / 3≤L6 / L3≤2; and / or The linkage assembly (40) is rotatably connected to the flap (20) at the sixth position F. When the flap (20) is in the extended state, the sixth position F, the first position E, the fourth position B, the second position A and the third position C are arranged sequentially along the opening direction of the flap (20), and the third position C, the second position A, the first position E, the fourth position B and the sixth position F are arranged from top to bottom.

10. The fume treatment device according to claim 1, characterized in that, The housing (10) has an inner cavity (14), and the first position E is a first rotating shaft (30), which is completely hidden in the inner cavity (14).

11. The oil fume treatment device according to claim 10, characterized in that, Along the opening direction of the flap (20), the first rotating shaft (30) is located on the front side of the inner cavity (14); the first rotating shaft (30) is also located at a lower position in the inner cavity (14).

12. The fume treatment device according to claim 11, characterized in that, Along a horizontal direction perpendicular to the extension direction of the first rotating shaft (30), the size of the housing (10) is a fourth distance S4, the first rotating shaft (30) has a central axis C1, and the distance between the central axis C1 and the front side (151) of the housing (10) in the front-rear direction is a fifth distance S5, where max(10mm, S4 / 33)≤S5≤min(S4 / 13, 25mm); and / or The housing (10) includes a front baffle (15) having a lower end face (152), a first rotating shaft (30) having a central axis C1, the radius of the first rotating shaft (30) being a first radius R1, the central axis C1 being parallel to the lower end face (152), and the vertical distance between the central axis C1 and the lower end face (152) being a sixth distance S6, wherein R1≤S6≤10mm; and / or The flap (20) includes a front surface (211), a rear surface (212), and an upper surface (213) disposed between the two, and the first rotating shaft (30) is disposed on the upper end of at least a portion of the upper surface (213).

13. The fume treatment device according to claim 12, characterized in that, The first rotating shaft (30) has a central longitudinal section Z1 parallel to the front surface (211), the central longitudinal section Z1 being located between the front surface (211) and the rear surface (212) in the front-rear direction; and / or The front surface (211) is parallel to the rear surface (212) and both are perpendicular to the upper end surface (213). The upper end surface (213) includes a mounting plate (2131) and a free end plate (2132). The first rotating shaft (30) is located at the upper end of the mounting plate (2131). The first rotating shaft (30) has a cutting surface W that is parallel to the mounting plate (2131) and tangent to the outer peripheral surface of the first rotating shaft (30). The first rotating shaft (30) also has a central longitudinal section Z that is parallel to the mounting plate (2131). The free end plate (2132) is disposed between the cutting surface W and the central longitudinal section Z.

14. The oil fume treatment device according to any one of claims 1 to 13, characterized in that, The first position E is the first rotating shaft (30). Along the horizontal direction perpendicular to the extension direction of the first rotating shaft (30), the size of the housing (10) is the fourth distance S4, and the height of the flap (20) is the flap height H, where 300mm≤S4≤400mm, H≤S4. When the flap (20) is in the extended state, the flap (20) and the horizontal plane Y behind it form a first included angle α, 120°≤α≤160°.

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