Oil smoke separation mechanism and range hood

Abstract

The utility model relates to the technical field of kitchen appliances, in particular to an oil fume separation mechanism and a range hood. The oil smoke separation mechanism comprises a shaft sleeve and a flexible flow deflector, one end of the flexible flow deflector is fixed to the shaft sleeve, the other end of the flexible flow deflector can rotate relative to the shaft sleeve, the rotating axis of the flexible flow deflector is parallel to the axis direction of the shaft sleeve, and the spiral angle of the flexible flow deflector is adjusted through rotation of the flexible flow deflector relative to the shaft sleeve. According to the oil-smoke separation mechanism, the oil-smoke separation area is dynamically adjusted by adjusting the spiral angle of the flexible flow deflector, so that the oil-smoke separation effect and the oil-smoke concentration are accurately matched to be matched with different working conditions of the range hood, and the use experience of a user is improved. According to the range hood, through the oil-smoke separation mechanism, the oil-smoke separation effect of the oil-smoke separation mechanism can be matched with the oil-smoke concentration, and the use experience of a user can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to an oil fume separation mechanism and a range hood. Background Art

[0002] At present, a large amount of oil smoke is often produced during the processing of restaurants and home kitchens. This oil smoke contains more oil and harmful chemicals. If the oil and harmful chemicals are directly discharged into the atmosphere without treatment, it will cause great harm to the environment and human body.

[0003] Existing range hoods generally separate oil fumes by setting up an oil fume separation mechanism, which includes a cylinder and a spiral plate. The cylinder is fixed between the outer shell and the inner shell of the whole machine, and the spiral plate is fixedly installed on both sides of the cylinder. The spiral plate is used to form a forced centrifugal channel, which can enhance the centrifugal separation effect and increase the inertial collision opportunity of the oil fume, thereby separating the grease contained in the smoke.

[0004] The existing oil fume separation mechanism is a static separation method, that is, the spiral plate and the cylinder are fixed, resulting in that the oil fume separation effect of the oil fume separation mechanism cannot be matched according to the oil fume concentration, affecting the user experience.

[0005] Therefore, it is urgent to design a new oil fume separation mechanism and range hood to improve the above-mentioned technical problems. Utility Model Content

[0006] One purpose of the utility model is to provide an oil fume separation mechanism, which can adjust the oil fume separation effect according to the oil fume concentration, thereby improving the user experience.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A fume separation mechanism is applied to a range hood, and the fume separation mechanism comprises:

[0009] Bushings; and,

[0010] One end of the flexible guide plate is fixed to the shaft sleeve, and the other end can rotate relative to the shaft sleeve. The rotation axis of the flexible guide plate is parallel to the axis direction of the shaft sleeve. The spiral angle of the flexible guide plate can be adjusted by rotating the flexible guide plate relative to the shaft sleeve.

[0011] As a preferred solution, the oil fume separation mechanism also includes:

[0012] The driving device is configured to drive the flexible guide plate to rotate relative to the shaft sleeve, and the driving device is communicatively connected with the oil fume concentration detection mechanism of the range hood.

[0013] As a preferred solution, the driving device includes:

[0014] A driving member, wherein the output shaft of the driving member is parallel to the axial direction of the sleeve; and

[0015] The rotating shaft has one end rotatably connected to the output shaft of the driving member, and the other end is located outside the port of the sleeve. The rotating shaft can move along the axial direction of the sleeve under the drive of the driving member and can rotate along the inner wall of the sleeve. One end of the flexible guide plate is fixed to the sleeve, and the other end is fixed to the rotating shaft.

[0016] As a preferred solution, a spiral groove is formed on the inner wall of the sleeve, and a convex point is formed on the rotating shaft. The convex point is engaged with the spiral groove and can slide along the circumference of the spiral groove.

[0017] As a preferred solution, the sleeve includes:

[0018] A sleeve body, the inner wall of which is provided with a spiral groove, and the rotating shaft is arranged in the sleeve body; and

[0019] The first fixing part is arranged on the shaft sleeve body, and one end of the flexible guide piece is fixed on the first fixing part.

[0020] As a preferred embodiment, the rotating shaft includes:

[0021] A rotating shaft body, wherein a convex point is provided on the rotating shaft body; and

[0022] The second fixing part is arranged on the rotating shaft body, and the other end of the flexible guide piece is fixed on the second fixing part.

[0023] As a preferred solution, the first fixing portion and / or the second fixing portion is a fixing clip, and the end of the flexible guide plate is clamped by the fixing clip.

[0024] As a preferred solution, the first fixing portion is vertically connected to the sleeve body, and the first fixing portion is symmetrically arranged with respect to the sleeve body; and / or,

[0025] The second fixing portion is vertically connected to the rotating shaft body, and the second fixing portion is symmetrically arranged with respect to the rotating shaft body.

[0026] As a preferred solution, the driving member is a telescopic motor.

[0027] Another object of the utility model is to provide a range hood, which can match the separation effect of the fume separation mechanism on the fume with the fume concentration, thereby improving the user experience.

[0028] To achieve this purpose, the utility model adopts the following technical solutions:

[0029] A range hood comprises a smoke exhaust pipe. The range hood also comprises the above-mentioned smoke separation mechanism. The smoke separation mechanism is arranged in the smoke exhaust pipe and the shaft sleeve is fixed to the pipe wall of the smoke exhaust pipe.

[0030] Beneficial effects of the utility model:

[0031] The oil fume separation mechanism provided by the utility model includes a shaft sleeve and a flexible guide plate, one end of the flexible guide plate is fixed to the shaft sleeve, and the other end can rotate relative to the shaft sleeve, the rotation axis of the flexible guide plate is parallel to the axis direction of the shaft sleeve, and the spiral angle of the flexible guide plate is adjusted by rotating the flexible guide plate relative to the shaft sleeve. The oil fume separation mechanism dynamically adjusts the oil fume separation area by adjusting the spiral angle of the flexible guide plate, thereby achieving accurate matching of the oil fume separation effect and the oil fume concentration, so as to match different working conditions of the range hood and improve the user experience.

[0032] The range hood provided by the utility model can achieve dynamic matching of the separation effect of the oil fume separation mechanism on the oil fume and the oil fume concentration through the above-mentioned oil fume separation mechanism, thereby adapting to different working conditions and being beneficial to improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is an exploded view of a range hood provided by a specific embodiment of the utility model;

[0034] Figure 2 It is a structural schematic diagram of a range hood provided by a specific embodiment of the utility model;

[0035] Figure 3 This is a cross-sectional view of the smoke exhaust duct provided by the specific embodiment of the utility model Figure 1 ;

[0036] Figure 4 This is a cross-sectional view of the smoke exhaust duct provided by the specific embodiment of the utility model Figure 2 ;

[0037] Figure 5 It is a cross-sectional view of a shaft sleeve provided in a specific embodiment of the utility model;

[0038] Figure 6 It is a structural schematic diagram of a rotating shaft provided in a specific embodiment of the utility model;

[0039] Figure 7 yes Figure 6 A partial enlarged view of the middle A;

[0040] Figure 8 It is a structural schematic diagram of a shaft sleeve provided in a specific implementation manner of the utility model.

[0041] In the figure:

[0042] 100, oil fume separation mechanism; 10, shaft sleeve; 11, shaft sleeve body; 12, first fixing portion; 13, spiral groove; 14, mounting portion; 20, flexible guide plate; 30, driving member; 40, rotating shaft; 41, rotating shaft body; 42, second fixing portion; 43, convex point;

[0043] 200. Machine body; 210. Main machine; 220. Smoke hood; 230. Check valve; 240. Smoke exhaust duct. DETAILED DESCRIPTION

[0044] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and implementation methods. It is understood that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings, rather than all.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of the embodiments of the present disclosure, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] like Figure 1 and Figure 2As shown, this embodiment provides a range hood, which includes a body 200, which includes a main unit 210 and a smoke collecting hood 220, which is disposed below the main unit 210. A smoke exhaust passage is disposed in the main unit 210, a smoke collecting cavity is formed inside the smoke collecting hood 220, the smoke collecting cavity is connected to the smoke exhaust passage, a filter is disposed in the smoke collecting cavity, and a smoke inlet connected to the smoke collecting cavity is disposed at the bottom of the smoke collecting hood 220. Figure 1 and Figure 2 As shown, a check valve 230 is also provided at the smoke exhaust outlet end of the smoke exhaust channel, and the check valve 230 is connected to the smoke exhaust pipe 240. The setting of the check valve 230 can prevent the airflow from flowing back, thereby preventing the exhausted gas from being driven back into the room by external wind, thereby improving the user experience.

[0049] The fumes generated during the cooking process pass through the smoke inlet, the smoke collecting chamber, the smoke exhaust channel and the check valve 230 in sequence and are then discharged through the smoke exhaust pipe 240. When the fumes pass through the filter, some grease and harmful chemicals can be filtered out, but some grease and harmful chemicals will still be discharged into the atmosphere with the airflow, causing great harm to the environment and human body.

[0050] To solve the above problems, Figure 1 and Figure 2 As shown, the range hood also includes an oil fume separation mechanism 100, which is arranged in the exhaust duct 240 and is connected to the smoke outlet of the check valve 230. The oil fume separation mechanism 100 can further separate grease and harmful chemicals in the airflow discharged from the check valve 230, thereby reducing the impact of grease and harmful chemicals on the environment.

[0051] Combination Figures 1 to 4 The structure of the oil fume separation mechanism 100 is described as follows. Figures 1 to 4 As shown, the oil fume separation mechanism 100 includes a sleeve 10 and a flexible guide plate 20. The sleeve 10 is fixed to the pipe wall of the exhaust pipe 240 to install the oil fume separation mechanism 100 on the exhaust pipe 240. One end of the flexible guide plate 20 is fixed to the sleeve 10, and the other end can rotate relative to the sleeve 10. The rotation axis of the flexible guide plate 20 is parallel to the axial direction of the sleeve 10. The helical angle of the flexible guide plate 20 is adjusted by rotating the flexible guide plate 20 relative to the sleeve 10. The flexible guide plate 20 is a flat sheet structure in a natural state. It is made of elastic materials such as rubber and can be stretched and twisted. The natural state here refers to a state without any external force.

[0052] Under the above structure, the flexible guide plate 20 can form a spiral blade with a variable spiral angle. The oil smoke collides with the spiral flexible guide plate 20 and is intercepted due to inertial collision, thereby achieving the separation effect of the oil smoke separation mechanism 100 on grease and harmful chemicals. The oil smoke separation mechanism 100 uses the cyclone separation principle to filter and purify the oil smoke at the end of the range hood. By adjusting the spiral angle of the flexible guide plate 20 to achieve dynamic adjustment of the oil smoke separation area, the oil smoke separation effect and the oil smoke concentration are accurately matched to match the different working conditions of the range hood and improve the user experience.

[0053] Generally, the spiral angle of the flexible guide plate 20 ranges from 0° to 180°. Figure 3 and Figure 4 The oil fume filtering effects of the oil fume separation mechanism 100 corresponding to the flexible guide plate 20 being in different states are described.

[0054] like Figure 3 As shown, the flexible guide plate 20 does not rotate relative to the shaft sleeve 10, that is, the spiral angle of the flexible guide plate 20 is 0°. At this time, the flexible guide plate 20 is in a flattened state, which is suitable for the working condition of the range hood with the lowest oil fume concentration. The flexible guide plate 20 in the flattened state basically does not filter the oil fume. The flexible guide plate 20 in this state can filter the oil fume with very low concentration to ensure that the airflow discharged from the check valve 230 is in a large displacement state. The flexible guide plate 20 in this state can be used for the weak gear of the range hood.

[0055] like Figure 4 As shown, the rotation angle of the flexible guide plate 20 relative to the shaft sleeve 10 is 180°. At this time, the spiral angle of the flexible guide plate 20 is the largest. The flexible guide plate 20 in this state can have the best filtering effect on oil smoke. The flexible guide plate 20 in this state is suitable for the working condition of the range hood with the highest oil smoke concentration and can filter oil smoke with a relatively large concentration. The flexible guide plate 20 in this state can be used for the stir-frying gear of the range hood.

[0056] Of course, the rotation angle of the flexible guide plate 20 relative to the sleeve 10 can also be 90°. In this state, the flexible guide plate 20 has a medium filtering effect on oil fumes. The flexible guide plate 20 in this state can filter oil fumes with moderate concentrations. The flexible guide plate 20 in this state can be used for the strong gear of the range hood.

[0057] It is understandable that the flexible guide plate 20 is not limited to the aforementioned three usage states, and the gear of the range hood is not limited to the weak gear, the strong gear and the stir-fry gear. Before the range hood leaves the factory, the rotation angle of the flexible guide plate 20 relative to the sleeve 10 can be experimentally matched with the gear of the range hood one by one. The larger the spiral angle of the flexible guide plate 20, the better the oil fume separation effect, thereby achieving the purpose of dynamically adjusting the oil fume separation effect of the oil fume separation mechanism 100 according to the oil fume concentration, so as to match the different working conditions of the range hood and improve the user experience.

[0058] The number of the oil fume separation mechanism 100 in the exhaust pipe 240 may be one or at least two. When the number of the oil fume separation mechanism 100 is one, the oil fume separation mechanism 100 is located in the vertical section or the horizontal section of the exhaust pipe 240; when the number of the oil fume separation mechanism 100 in the exhaust pipe 240 is at least two, at least two oil fume separation mechanisms 100 are respectively arranged in the vertical section and / or the horizontal section of the exhaust pipe 240 at intervals. In this embodiment, one oil fume separation mechanism 100 is arranged in the vertical section of the exhaust pipe 240, which has a simple structure and is easy to operate.

[0059] In this embodiment, the oil fume separation mechanism 100 also includes a driving device, and the range hood includes an oil fume concentration detection mechanism (not shown). The oil fume concentration detection mechanism can detect the oil fume concentration, and the driving device is used to drive the flexible guide plate 20 to rotate relative to the sleeve 10. The driving device is communicatively connected with the oil fume concentration detection mechanism so that the driving device can drive the flexible guide plate 20 to rotate relative to the sleeve 10 to a corresponding angle according to the real-time oil fume concentration, thereby automatically adjusting the oil fume separation effect of the oil fume separation mechanism 100 according to the oil fume concentration.

[0060] In addition, the range hood further includes a control mechanism (not shown), and the fume concentration detection mechanism and the driving device are respectively connected to the control mechanism in communication. After the range hood is started, the current fume concentration is detected by the fume concentration detection mechanism, and the fume concentration detection mechanism sends the detected fume concentration signal to the control mechanism. After the control mechanism identifies the fume concentration signal, it controls the driving device to start, so that the driving device drives the flexible guide plate 20 to rotate a corresponding angle relative to the shaft sleeve 10, thereby achieving the separation effect of the fume separation mechanism 100 on grease and harmful chemicals according to the fume concentration matching.

[0061] The oil fume concentration detection mechanism can be set at the position of the check valve 230, and can accurately detect the oil fume concentration at the check valve 230. In other optional embodiments, the oil fume concentration detection mechanism can also be set at other positions such as the smoke inlet and the smoke collecting chamber, and all positions that can detect the oil fume concentration are within the protection scope of other optional embodiments.

[0062] It should be noted here that the control mechanism and the oil fume concentration detection mechanism are both mature technologies in the art. The control mechanism and the oil fume concentration detection mechanism in the embodiment of the present disclosure can adopt any structure in the prior art, which will not be described in detail here. Similarly, the specific connection circuits between the control mechanism, the oil fume concentration detection mechanism and the drive device are also mature technologies in the prior art. The embodiment of the present disclosure can adopt any existing circuit structure as long as it can achieve the above-mentioned signal transmission.

[0063] like Figure 3 and Figure 4 As shown, the driving device includes a driving member 30 and a rotating shaft 40. The output shaft of the driving member 30 is parallel to the axial direction of the sleeve 10. One end of the rotating shaft 40 is rotatably connected to the output shaft of the driving member 30, and the other end is located outside the port of the sleeve 10. The rotating shaft 40 can move along the axial direction of the sleeve 10 under the drive of the driving member 30, and can rotate along the inner wall of the sleeve 10. One end of the flexible guide plate 20 is fixed to the sleeve 10, and the other end is fixed to the rotating shaft 40. The rotating shaft 40 moves along the axial direction of the sleeve 10 under the drive of the driving member 30. At the same time, the rotating shaft 40 will also rotate under the guidance of the inner wall of the sleeve 10, while the sleeve 10 is always fixed. In this way, the end of the flexible guide plate 20 fixed to the sleeve 10 is immovable, and the end fixed to the rotating shaft 40 will be stretched and twisted to form a spiral shape as the rotating shaft 40 rotates. Optionally, the driving member 30 is a telescopic motor. The greater the telescopic stroke of the telescopic motor, the greater the spiral angle of the flexible guide plate 20, the better the cyclone separation effect, and the dynamic matching with the oil fume concentration is achieved.

[0064] To realize the rotation of the rotating shaft 40 in the sleeve 10, as Figures 5 to 7 As shown, a spiral groove 13 is formed on the inner wall of the sleeve 10, and a protrusion 43 is provided on the rotating shaft 40. The protrusion 43 is engaged with the spiral groove 13 and can slide circumferentially along the spiral groove 13, thereby driving the rotating shaft 40 to rotate along the inner wall of the sleeve 10, so that the rotating shaft 40 can rotate while moving linearly.

[0065] Combination Figure 5 and Figure 8 The structure of the sleeve 10 is described as follows. Figure 5 and Figure 8 As shown, the sleeve 10 includes a sleeve body 11 and a first fixing portion 12 arranged on the sleeve body 11, the inner wall of the sleeve body 11 is provided with the above-mentioned spiral groove 13, the rotating shaft 40 is arranged in the sleeve body 11, and the rotating shaft 40 performs linear motion and rotational motion in the sleeve body 11, one end of the flexible guide plate 20 is fixed to the first fixing portion 12, and the other end is fixed to the rotating shaft 40.

[0066] The sleeve 10 further includes a mounting portion 14, which is connected to a mounting hole provided on the smoke exhaust pipe 240, so as to fix the oil fume separation mechanism 100 on the smoke exhaust pipe 240. In this embodiment, a mounting hole is provided at the top of the vertical portion of the smoke exhaust pipe 240, and the mounting portion 14 of the sleeve 10 is installed in the mounting hole, and the flexible guide plate 20 faces the smoke outlet of the check valve 230. Optionally, the mounting portion 14 and the sleeve body 11 are arranged at an angle, and the specific angle of the angle is not limited in this embodiment, and can be matched with the curvature or slope of the smoke exhaust pipe 240 at the mounting hole.

[0067] Combination Figure 6 and Figure 7 The structure of the rotating shaft 40 is described. The rotating shaft 40 includes a rotating shaft body 41 and a second fixing portion 42. The rotating shaft body 41 is provided with the above-mentioned convex point 43. The second fixing portion 42 is provided on the rotating shaft body 41, and the other end of the flexible guide plate 20 is fixed to the second fixing portion 42. At least a portion of the rotating shaft body 41 is located in the sleeve body 11, and the convex point 43 is provided on this portion of the rotating shaft body 41, so that the rotating shaft body 41 can rotate along the spiral groove 13 on the inner wall of the sleeve body 11. The portion of the rotating shaft body 41 extending out of the sleeve body 11 is provided with the second fixing portion 42, and the second fixing portion 42 and the first fixing portion 12 are arranged at intervals, so that one end of the flexible guide plate 20 is fixed to the first fixing portion 12, and the other end is fixed to the second fixing portion 42.

[0068] Further, the first fixing portion 12 and / or the second fixing portion 42 is a fixing clamp, and the end of the flexible guide plate 20 is clamped by the fixing clamp. In order to ensure that the flexible guide plate 20 can be a flat sheet structure in a natural state, the first fixing portion 12 and the second fixing portion 42 are arranged in parallel in the initial state, and the lengths of the first fixing portion 12 and the second fixing portion 42 are equal. It should be noted that the initial state mentioned here is the state where the range hood is not working.

[0069] Furthermore, the first fixing portion 12 is vertically connected to the sleeve body 11, and the sleeve body 11 is fixedly connected to the center of the first fixing portion 12, so that the first fixing portion 12 is symmetrically arranged with respect to the sleeve body 11. Similarly, the second fixing portion 42 is vertically connected to the rotating shaft body 41, and the rotating shaft body 41 is fixedly connected to the center of the second fixing portion 42, so that the second fixing portion 42 is symmetrically arranged with respect to the rotating shaft body 41. Under the above structure, the flexible guide plate 20 can maintain a flat sheet structure in a natural state. The flexible guide plate 20 is clamped by a fixing clip, which has a simple structure and is convenient for repairing and replacing the flexible guide plate 20. Of course, the fixing method of the flexible guide portion to the first fixing portion 12 and the second fixing portion 42 respectively can also be welding or threaded connection, etc., as long as the fixing of the flexible guide plate 20 to the first fixing portion 12 and the second fixing portion 42 can be achieved.

[0070] 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 methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A fume separation mechanism, applied to a range hood, characterized in that: The oil fume separation mechanism comprises: a bushing (10); and A flexible guide plate (20) has one end fixed to the shaft sleeve (10) and the other end capable of rotating relative to the shaft sleeve (10); the rotation axis of the flexible guide plate (20) is parallel to the axial direction of the shaft sleeve (10); and the spiral angle of the flexible guide plate (20) is adjusted by rotating the flexible guide plate (20) relative to the shaft sleeve (10).

2. The oil fume separation mechanism according to claim 1, characterized in that: The oil fume separation mechanism also includes: The driving device is configured to drive the flexible guide plate (20) to rotate relative to the shaft sleeve (10), and the driving device is communicatively connected to the oil fume concentration detection mechanism of the range hood.

3. The oil fume separation mechanism according to claim 2, characterized in that: The driving device comprises: a driving member (30), wherein an output shaft of the driving member (30) is parallel to an axial direction of the sleeve (10); and A rotating shaft (40) has one end rotatably connected to the output shaft of the driving member (30), and the other end is located outside the port of the sleeve (10). The rotating shaft (40) can move along the axial direction of the sleeve (10) and can rotate along the inner wall of the sleeve (10) under the drive of the driving member (30). One end of the flexible guide plate (20) is fixed to the sleeve (10), and the other end is fixed to the rotating shaft (40).

4. The oil fume separation mechanism according to claim 3, characterized in that: The inner wall of the shaft sleeve (10) is provided with a spiral groove (13), and the rotating shaft (40) is provided with a convex point (43). The convex point (43) is engaged with the spiral groove (13) and can slide along the circumference of the spiral groove (13).

5. The oil fume separation mechanism according to claim 4, characterized in that: The shaft sleeve (10) comprises: A shaft sleeve body (11), the inner wall of which is provided with the spiral groove (13), and the rotating shaft (40) is arranged in the shaft sleeve body (11); and A first fixing portion (12) is arranged on the shaft sleeve body (11), and one end of the flexible guide plate (20) is fixed to the first fixing portion (12).

6. The oil fume separation mechanism according to claim 5, characterized in that: The rotating shaft (40) comprises: a rotating shaft body (41), wherein the convex point (43) is provided on the rotating shaft body (41); and A second fixing portion (42) is arranged on the rotating shaft body (41), and the other end of the flexible guide plate (20) is fixed to the second fixing portion (42).

7. The oil fume separation mechanism according to claim 6, characterized in that: The first fixing portion (12) and / or the second fixing portion (42) is a fixing clamp, and the end of the flexible guide plate (20) is clamped by the fixing clamp.

8. The oil fume separation mechanism according to claim 6, characterized in that: The first fixing portion (12) is vertically connected to the shaft sleeve body (11), and the first fixing portion (12) is symmetrically arranged with respect to the shaft sleeve body (11); and / or, The second fixing portion (42) is vertically connected to the rotating shaft body (41), and the second fixing portion (42) is symmetrically arranged with respect to the rotating shaft body (41).

9. The oil fume separation mechanism according to any one of claims 3 to 8, characterized in that: The driving member (30) is a telescopic motor.

10. A range hood, comprising a smoke exhaust duct, characterized in that: The range hood further comprises an oil fume separation mechanism (100) according to any one of claims 1 to 9, wherein the oil fume separation mechanism (100) is arranged in the smoke exhaust pipe and the shaft sleeve (10) is fixed to the pipe wall of the smoke exhaust pipe.

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