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 first sleeve and a filter plate, the filter plate is rotationally arranged in the first sleeve, the rotating axis of the filter plate and the axis of the first sleeve are arranged to form an included angle, and the deflection angle of the filter plate relative to the cross section of the first sleeve is adjusted through rotation of the filter plate relative to the first sleeve. And the oil fume separation effect of the oil fume separation mechanism can be matched according to the oil fume concentration so as to realize dynamic adjustment, so that different working conditions of the range hood are matched, 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 smoke through an oil smoke separation mechanism, which includes a sleeve and a filter plate arranged inside the sleeve. The oil smoke collides with the filter plate and is intercepted due to inertial collision. Existing oil smoke separation mechanisms often use static separation, that is, the filter plate and the sleeve are fixed, resulting in the oil smoke separation mechanism The effect of separating oil smoke cannot be matched according to the concentration of oil smoke, affecting the user experience.

[0004] Therefore, it is urgent to design a new oil fume separation mechanism and a range hood to improve the above problems. Utility Model Content

[0005] 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.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A fume separation mechanism, applied to a range hood, comprises:

[0008] a first sleeve; and

[0009] The filter plate is rotatably disposed in the first sleeve, and the rotation axis of the filter plate is disposed at an angle with the axis of the first sleeve. The filter plate is rotated relative to the first sleeve to adjust the deflection angle of the filter plate relative to the cross section of the first sleeve.

[0010] As a preferred solution, at least two filter plates are provided, and the at least two filter plates are arranged along the circumference of the first sleeve.

[0011] As a preferred solution, the rotation axis is arranged along the radial direction of the first sleeve, and when at least two filter plates are in a state perpendicular to the axis of the first sleeve, at least two filter plates abut in sequence along the circumference of the first sleeve.

[0012] As a preferred solution, the oil fume separation mechanism also includes:

[0013] The driving device is configured to drive the filter plate to rotate relative to the first sleeve, and the driving device is used to communicate with the oil fume concentration detection mechanism of the range hood.

[0014] As a preferred solution, the driving device includes:

[0015] A crank, comprising a crankshaft, a crank arm and a crank pin connected in sequence, wherein the crankshaft is connected to the first sleeve and to the filter plate; and

[0016] The rotary drive assembly can drive the crank pin to rotate around the rotation axis.

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

[0018] A sleeve body, wherein the filter plate is disposed in the sleeve body; and

[0019] The support is arranged on the sleeve body, and the crankshaft is pivotally connected to the sleeve body.

[0020] As a preferred solution, the rotary drive assembly includes:

[0021] The second sleeve is sleeved on the outer circumference of the first sleeve, and the inner wall of the second sleeve is provided with an annular slot, and the crank pin is inserted into the annular slot and can slide along the circumference of the annular slot;

[0022] The driving mechanism is configured to move the second sleeve along its axial direction.

[0023] As a preferred solution, the second sleeve is threadedly connected to the first sleeve, and the driving mechanism includes:

[0024] A first motor is disposed outside the second sleeve, and an output shaft of the first motor is parallel to an axial direction of the second sleeve; and

[0025] A driving wheel is connected to the output shaft of the first motor, and the driving wheel is in driving cooperation with the second sleeve.

[0026] As a preferred solution, the driving wheel is a friction wheel, and the circumferential outer wall of the friction wheel abuts against the second sleeve;

[0027] Alternatively, the driving wheel is a gear, a gear ring is provided on the outer wall of the second sleeve, and the gear is meshed with the gear ring.

[0028] 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.

[0029] To achieve this purpose, the utility model adopts the following technical solutions:

[0030] A range hood comprises a body, the range hood also comprises the above oil fume separation mechanism, a smoke inlet is arranged on the body, a smoke exhaust passage connected with the smoke inlet is arranged in the body, and the oil fume separation mechanism is connected with the smoke exhaust passage.

[0031] Beneficial effects of the utility model:

[0032] The oil fume separation mechanism provided by the utility model includes a first sleeve and a filter plate. The filter plate is rotatably arranged in the first sleeve. The rotation axis of the filter plate is arranged at an angle to the axis of the first sleeve. The filter plate is rotated relative to the first sleeve to adjust the deflection angle of the filter plate relative to the cross-section of the first sleeve to achieve adjustment of the oil fume separation area. The oil fume separation effect of the oil fume separation mechanism can be matched according to the oil fume concentration to achieve dynamic adjustment to match different working conditions of the range hood and improve the user experience.

[0033] The range hood provided by the utility model can match the separation effect of the oil fume separation mechanism on the oil fume with the oil fume concentration through the above oil fume separation mechanism, which is beneficial to improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is an exploded view of the range hood provided in the first embodiment of the utility model;

[0035] Figure 2 This is a cross-sectional view of the range hood provided in the first embodiment of the utility model. Figure 1 ;

[0036] Figure 3 This is a cross-sectional view of the range hood provided in the first embodiment of the utility model. Figure 2 ;

[0037] Figure 4 yes Figure 2 A partial enlarged view of the middle A;

[0038] Figure 5 This is a structural schematic diagram of the oil fume separation mechanism provided in the second embodiment of the utility model;

[0039] Figure 6 It is a cross-sectional view of the oil fume separation mechanism provided in the third embodiment of the utility model;

[0040] Figure 7 is a cross-sectional view of a range hood provided by Embodiment 4 of the present utility model;

[0041] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle.

[0042] In the figure:

[0043] 1000. Range hood;

[0044] 100, oil fume separation mechanism; 10, first sleeve; 11, sleeve body; 111, second threaded portion; 12, support; 20, filter plate; 21, filter hole; 30, drive device; 31, crank; 311, crankshaft; 312, crank arm; 313, crank pin; 32, rotation drive assembly; 321, second sleeve; 3211, annular slot; 3212, gear ring; 3213, first threaded portion; 322, drive mechanism; 3221, first motor; 3222, drive wheel; 323, mounting frame; 324, second motor; 325, connecting shaft; 326, linear drive mechanism;

[0045] 200, machine body; 210, host machine; 211, smoke exhaust channel; 220, smoke collecting hood; 221, smoke collecting chamber; 222, smoke inlet; 230, check valve;

[0046] 300. Oil fume concentration detection agency. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Embodiment 1

[0052] like Figure 1 and Figure 2 As shown, the embodiment of the present disclosure provides a range hood 1000, which includes a body 200, and the body 200 includes a main unit 210 and a smoke collecting hood 220, and the smoke collecting hood 220 is arranged below the main unit 210. A smoke exhaust passage 211 is arranged in the main unit 210, and a smoke collecting cavity 221 is formed inside the smoke collecting hood 220, which is connected to the smoke exhaust passage 211, and a filter is arranged in the smoke collecting cavity 221, and a smoke inlet 222 connected to the smoke collecting cavity 221 is arranged 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 end of the smoke exhaust channel 211. The setting of the check valve 230 can prevent the airflow from flowing back, thereby preventing the exhausted gas from being driven by external wind to flow back into the room, thereby improving the user experience.

[0053] like Figure 1 and Figure 2 As shown, the fumes generated during the cooking process are discharged after passing through the smoke inlet 222, the smoke collecting chamber 221, the smoke exhaust channel 211 and the check valve 230 in sequence. 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, which will cause great harm to the environment and human body.

[0054] To solve the above problems, Figure 1 and Figure 2 As shown, the range hood 1000 also includes an oil fume separation mechanism 100, which is connected to the air outlet end 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.

[0055] Combination Figure 1 and Figure 2 The structure of the oil fume separation mechanism 100 is described as follows. Figure 1 and Figure 2As shown, the oil fume separation mechanism 100 includes a first sleeve 10 and a filter plate 20, the filter plate 20 is disposed in the first sleeve 10, and a filter hole 21 is provided on the filter plate 20, the oil fume collides with the filter plate 20 and is intercepted due to inertial collision, thereby achieving the oil fume separation mechanism 100's separation effect on grease and harmful chemicals. However, the existing oil fume separation mechanism 100 usually adopts a static separation method, that is, the filter plate 20 and the first sleeve 10 are fixed, resulting in the oil fume separation mechanism 100's separation effect on oil fume cannot be matched according to the oil fume concentration, affecting the user experience.

[0056] To solve the above problems, Figure 1 and Figure 2 As shown, the filter plate 20 is rotatably connected to the first sleeve 10, and the rotation axis of the filter plate 20 is set at an angle to the axis of the first sleeve 10. The filter plate 20 is rotated relative to the first sleeve 10 to adjust the deflection angle of the cross section of the filter plate 20 relative to the first sleeve 10 to achieve adjustment of the oil fume separation area. The oil fume separation effect of the oil fume separation mechanism 100 can be matched according to the oil fume concentration to achieve dynamic adjustment, so as to match different working conditions of the range hood 1000 and improve the user experience.

[0057] Combination Figure 2 and Figure 3 The oil fume filtering effects of the oil fume separation mechanism 100 corresponding to the different states of the filter plate 20 are described.

[0058] like Figure 2 As shown, the filter plate 20 is arranged parallel to the cross section of the first sleeve 10. The filter plate 20 in this state can achieve the best filtering effect on oil smoke. The filter plate 20 in this state can filter oil smoke with a larger concentration. The filter plate 20 in this state can be used for the stir-fry gear of the range hood 1000.

[0059] like Figure 3 As shown, the filter plate 20 is arranged perpendicular to the cross-section of the first sleeve 10. The filter plate 20 in this state basically does not filter the oil fume. The filter plate 20 in this state can filter the oil fume with a lower concentration. The filter plate 20 in this state can ensure the discharge of a larger displacement of the airflow discharged from the check valve 230. The filter plate 20 in this state can be used for the weak gear of the range hood 1000.

[0060] Of course, the filter plate 20 can also be arranged at a 45° angle to the cross-section of the first sleeve 10. In this state, the filter plate 20 has a medium filtering effect on oil fumes. The filter plate 20 in this state can filter oil fumes of moderate concentration. The filter plate 20 in this state can be used for the strong mode of the range hood 1000.

[0061] Of course, the filter plate 20 is not limited to the three aforementioned usage states, and the gear of the range hood 1000 is not limited to the weak gear, the strong gear and the stir-fry gear. Before the range hood 1000 leaves the factory, the angle between the cross section of the filter plate 20 and the first sleeve 10 can be matched with the gear of the range hood 100 through experiments, so that the separation effect of the fume separation mechanism 100 on the fume can be dynamically adjusted according to the fume concentration to match the different working conditions of the range hood 1000 and improve the user experience.

[0062] like Figure 1 to Figure 3 As shown, at least two filter plates 20 are provided, and at least two filter plates 20 are arranged along the circumference of the first sleeve 10. When the filter plates 20 are provided at an angle to the cross-section of the first sleeve 10, since at least two filter plates 20 are deflected at an angle to the axis of the first sleeve 10, a cyclone effect is formed by at least two filter plates 20, and grease and harmful chemicals are thrown to the inner wall of the first sleeve 10 by the centrifugal force of the cyclone separation, and the grease and harmful chemicals are finally collected in the oil circuit (not shown in the figure) of the range hood 1000, thereby further improving the separation effect of the oil fume separation mechanism 100 on grease and harmful chemicals.

[0063] In an optional embodiment, only one filter plate 20 may be provided, and the oil fume separation area can be adjusted by adjusting the deflection angle of one filter plate 20, which has a simple structure and is easy to operate.

[0064] like Figure 2 and Figure 4 As shown, the rotation axis of the filter plate 20 is arranged along the radial direction of the first sleeve 10. When at least two filter plates 20 are perpendicular to the axis of the first sleeve 10, at least two filter plates 20 are abutted in sequence along the circumference of the first sleeve 10. At least two filter plates 20 are spliced ​​to form an annular structure or a circular structure. The annular structure or the circular structure can better intercept and filter the oil fume, ensure that the oil fume is separated and filtered with a larger separation area, and achieve a better separation effect of at least two filter plates 20 on grease and harmful chemicals.

[0065] like Figure 1 to Figure 3 As shown, the oil fume separation mechanism 100 also includes a driving device 30, and the range hood 1000 includes an oil fume concentration detection mechanism 300. The oil fume concentration detection mechanism 300 can detect the oil fume concentration. The driving device 30 is used to drive the filter plate 20 to rotate relative to the first sleeve 10. The driving device 30 is used to communicate with the oil fume concentration detection mechanism 300 so that the driving device 30 drives the filter plate 20 to rotate relative to the first sleeve 10 at a corresponding angle, thereby automatically adjusting the oil fume separation effect of the oil fume separation mechanism 100 according to the oil fume concentration.

[0066] In addition, if Figure 1 to Figure 3As shown, the range hood 1000 also includes a control mechanism (not shown in the figure), the oil fume concentration detection mechanism 300 and the driving device 30 are respectively connected to the control mechanism for communication. After the range hood 1000 is started, the current oil fume concentration is detected by the oil fume concentration detection mechanism 300, and the oil fume concentration detection mechanism 300 sends the detected oil fume concentration signal to the control mechanism. After the control mechanism identifies the oil fume concentration signal, it controls the driving device 30 to start, so that the driving device 30 drives the filter plate 20 to rotate a corresponding angle relative to the first sleeve 10, thereby matching the grease and harmful chemical separation effect of the oil fume separation mechanism 100 according to the oil fume concentration.

[0067] like Figure 2 and Figure 3 As shown, the oil fume concentration detection mechanism 300 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.

[0068] It should be noted that the control mechanism and the oil fume concentration detection mechanism 300 are both mature technologies in the art. The control mechanism and the oil fume concentration detection mechanism 300 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 300 and the drive device 30 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.

[0069] like Figure 2 and Figure 4 As shown, the driving device 30 includes a crank 31 and a rotary driving assembly 32. The crank 31 includes a crankshaft 311, a crank arm 312 and a crank pin 313 which are connected in sequence. The crankshaft 311 is connected to the first sleeve 10 and to the filter plate 20. The rotary driving assembly 32 can drive the crank pin 313 to rotate around the rotation axis. By utilizing the lever principle, the rotary driving assembly 32 only needs to provide a small driving force to drive the crank 31. The operation of the oil fume separation mechanism 100 can achieve better energy-saving effects.

[0070] Specifically, if Figure 2 and Figure 4As shown, the rotary drive assembly 32 includes a second sleeve 321 and a driving mechanism 322. The second sleeve 321 is sleeved on the outer periphery of the first sleeve 10. The inner wall of the second sleeve 321 is provided with an annular slot 3211. The crank pin 313 is inserted into the annular slot 3211 and can slide circumferentially along the annular slot 3211. The driving mechanism 322 can move the second sleeve 321 along the axial direction of the second sleeve 321. When the second sleeve 321 moves along the axial direction of the second sleeve 321, the annular slot 3211 can enable the crank pin 313 to slide circumferentially in the annular slot 3211 and move along the axial direction of the second sleeve 321. The circumferential sliding of the crank pin 313 in the annular slot 3211 and the axial movement of the crank pin 313 along the axial direction of the second sleeve 321 can be converted into the rotation of the crank pin 313 around the rotation axis, thereby achieving the effect of the crank 31 driving the filter plate 20 to rotate. The rotation drive assembly 32 of the above structure is compact in structure, which facilitates the installation of the rotation drive assembly 32 in a smaller space.

[0071] like Figure 2 As shown, the rotation driving assembly 32 further includes a mounting frame 323 , which is disposed on the host 210 , and the driving mechanism 322 is disposed on the mounting frame 323 , and the mounting frame 323 can provide a stable supporting effect for the driving mechanism 322 .

[0072] Specifically, if Figure 2 As shown, the second sleeve 321 is threadedly connected to the first sleeve 10, and the driving mechanism 322 includes a first motor 3221, which is arranged outside the second sleeve 321, and the output shaft of the first motor 3221 is parallel to the axial direction of the second sleeve 321, and the driving wheel 3222 is connected to the output shaft of the first motor 3221, and the driving wheel 3222 is in transmission cooperation with the second sleeve 321. The rotation output by the first motor 3221 can realize the rotation of the second sleeve 321, so as to realize the adjustment of the position of the second sleeve 321 relative to the first sleeve 10 along the axial direction of the second sleeve 321. For example, as Figure 2 As shown, the second sleeve 321 is provided with a first threaded portion 3213 , the first sleeve 10 is provided with a second threaded portion 111 , and the first threaded portion 3213 is threadedly connected with the second threaded portion 111 .

[0073] Specifically, if Figure 2 As shown, the driving wheel 3222 is a friction wheel, and the circumferential outer wall of the friction wheel abuts against the second sleeve 321. When the friction wheel rotates, a friction force is applied to the second sleeve 321, and the friction force can drive the second sleeve 321 to rotate relative to the first sleeve 10. Exemplarily, the material of the friction wheel can be rubber, leather, plastic, etc. All materials with a large friction coefficient and capable of providing greater friction are within the protection scope of the embodiments of the present disclosure.

[0074] Combination Figure 4 The structure of the first sleeve 10 is described as follows. Figure 4 As shown, the first sleeve 10 includes a sleeve body 11 and a support 12, the filter plate 20 is arranged in the sleeve body 11, the support 12 is arranged in the sleeve body 11, the crankshaft 311 is pivotally connected to the sleeve body 11, the sleeve body 11 can achieve a better support effect on the crankshaft 311, and can also ensure a smoother rotation effect of the crankshaft 311 relative to the support 12, avoiding the jamming problem during the rotation of the crankshaft 311 relative to the support 12, and realizing smooth adjustment of the deflection angle of the filter plate 20.

[0075] Embodiment 2

[0076] like Figure 5 As shown, this embodiment provides an oil fume separation mechanism 100, the structure of which is substantially the same as that of the oil fume separation mechanism 100 of the first embodiment, and the main difference between the two is that the specific structure of the driving device 30 is different, such as Figure 5 As shown, the driving device 30 of the embodiment of the present disclosure only includes a rotation driving component 32, and the rotation driving component 32 includes a second motor 324 and a connecting shaft 325, wherein the output shaft of the second motor 324 is colinear with the rotation axis of the filter plate 20, and the output shaft of the second motor 324 is connected to the filter plate 20 through the connecting shaft 325, and the connecting shaft 325 is pivotally connected to the support 12. The operation of the second motor 324 can make the filter plate 20 rotate relative to the first sleeve 10. The driving device 30 of the above structure has a simple structure and is easy to install.

[0077] Embodiment 3

[0078] like Figure 6 As shown, this embodiment provides an oil fume separation mechanism 100, the structure of which is substantially the same as that of the oil fume separation mechanism 100 of the first embodiment, and the main difference between the two is that the specific structure of the rotation drive assembly 32 is different, such as Figure 6 As shown, the rotary drive assembly 32 of the disclosed embodiment includes a linear drive mechanism 326, the output end of the linear drive mechanism 326 is connected to the second sleeve 321, the first sleeve 10 and the second sleeve 321 are connected only by the crank 31, and the output end of the linear drive mechanism 326 performs a linear telescopic motion along the axis direction of the second sleeve 321, so that the second sleeve 321 moves along the axis direction of the second sleeve 321. This type of rotary drive assembly 32 has a simple structure and is easy to assemble.

[0079] Exemplarily, the linear drive mechanism 326 may be a linear drive motor, a linear drive cylinder, a screw nut assembly, a gear rack assembly, etc. All linear drive mechanisms 326 that can achieve linear output are within the protection scope of the embodiments of the present disclosure.

[0080] Embodiment 4

[0081] like Figure 7 and Figure 8 As shown, this embodiment provides an oil fume separation mechanism 100, the structure of which is substantially the same as that of the oil fume separation mechanism 100 of the first embodiment, and the main difference between the two is that the specific structure of the driving wheel 3222 and the matching relationship between the driving wheel 3222 and the second sleeve 321 are different, such as Figure 7 and Figure 8 As shown, the driving wheel 3222 of the embodiment of the present disclosure is a gear, and a gear ring 3212 is provided on the outer wall of the second sleeve 321, and the gear is meshed with the gear ring 3212, wherein the meshing of the gear and the gear ring 3212 has the effects of high transmission efficiency, good transmission stability and large bearing capacity.

[0082] 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: include: A first sleeve (10); as well as A filter plate (20) is rotatably disposed in the first sleeve (10); the rotation axis of the filter plate (20) is disposed at an angle to the axis of the first sleeve (10); and the filter plate (20) is rotated relative to the first sleeve (10) to adjust the deflection angle of the cross section of the filter plate (20) relative to the first sleeve (10).

2. The oil fume separation mechanism according to claim 1, characterized in that: The number of the filter plates (20) is at least two, and the at least two filter plates (20) are arranged along the circumference of the first sleeve (10).

3. The oil fume separation mechanism according to claim 2, characterized in that: The rotation axis is arranged along the radial direction of the first sleeve (10), and when at least two of the filter plates (20) are in a state perpendicular to the axis of the first sleeve (10), at least two of the filter plates (20) abut against each other in sequence along the circumference of the first sleeve (10).

4. The oil fume separation mechanism according to any one of claims 1 to 3, characterized in that: The oil fume separation mechanism also includes: The driving device (30) is configured to drive the filter plate (20) to rotate relative to the first sleeve (10), and the driving device (30) is used to communicate with the oil fume concentration detection mechanism (300) of the range hood.

5. The oil fume separation mechanism according to claim 4, characterized in that: The driving device (30) comprises: A crank (31), comprising a crankshaft (311), a crank arm (312), and a crank pin (313) connected in sequence, wherein the crankshaft (311) is connected to the first sleeve (10) and to the filter plate (20); and The rotary drive assembly (32) can drive the crank pin (313) to rotate around the rotation axis.

6. The oil fume separation mechanism according to claim 5, characterized in that: The first sleeve (10) comprises: A sleeve body (11), wherein the filter plate (20) is arranged in the sleeve body (11); and The support (12) is arranged on the sleeve body (11), and the crankshaft (311) is pivotally connected to the sleeve body (11).

7. The oil fume separation mechanism according to claim 5, characterized in that: The rotary drive assembly (32) comprises: A second sleeve (321) is sleeved on the outer circumference of the first sleeve (10), an inner wall of the second sleeve (321) is provided with an annular slot (3211), the crank pin (313) is inserted into the annular slot (3211) and can slide along the circumference of the annular slot (3211); The driving mechanism (322) is configured to move the second sleeve (321) along its axial direction.

8. The oil fume separation mechanism according to claim 7, characterized in that: The second sleeve (321) is threadedly connected to the first sleeve (10), and the driving mechanism (322) comprises: A first motor (3221) is arranged outside the second sleeve (321), and an output shaft of the first motor (3221) is parallel to an axial direction of the second sleeve (321); and A driving wheel (3222), wherein the driving wheel (3222) is connected to the output shaft of the first motor (3221), and the driving wheel (3222) is in transmission cooperation with the second sleeve (321).

9. The oil fume separation mechanism according to claim 8, characterized in that: The driving wheel (3222) is a friction wheel, and the circumferential outer wall of the friction wheel abuts against the second sleeve (321); Alternatively, the driving wheel (3222) is a gear, a gear ring (3212) is provided on the outer wall of the second sleeve (321), and the gear is meshed with the gear ring (3212).

10. A range hood, comprising a body (200), characterized in that: The range hood further comprises an oil fume separation mechanism as claimed in any one of claims 1 to 9, a smoke inlet (222) is provided on the machine body (200), a smoke exhaust passage (211) connected to the smoke inlet (222) is provided in the machine body (200), and the oil fume separation mechanism is connected to the smoke exhaust passage (211).

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