A range hood and its control method

Abstract

The present invention relates to the technical field of kitchen appliances, and particularly relates to a range hood and a control method thereof. The range hood includes: a range hood body; an oil screen disposed on the range hood body; a smoke guide plate movably connected to the range hood body, the smoke guide plate having an initial state in which at least a part of the oil screen is covered, and a working state in which a space is provided for the oil screen; and a guiding portion adapted to guide the smoke guide plate to switch between the working state and the initial state relative to the range hood body; when the smoke guide plate switches from the initial state to the working state, its first end extends downward along the height direction. The range hood provided by the present invention increases the contact time between the cooking fumes and the smoke guide plate, invisibly increases the condensation area of the fumes, improves the filtering effect of the fumes, and achieves the effect of combining a top-mounted range hood and a side-mounted range hood.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and particularly to a range hood and a control method thereof. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Common range hoods include top - suction type and side - suction type. The top - suction type range hood is widely used due to its advantages such as neatness, lightness, and small space occupation. However, compared with the side - suction type range hood, for the top - suction type range hood, since the air inlet is far from the cooking stove, the cooking fumes need to travel a relatively long distance to enter the fan, and the time to reach the fan is also relatively longer. During operation, some cooking fumes are likely to escape, especially some cooking fumes escape from both sides, resulting in the defects that the top - suction type range hood often has poor fume - escaping prevention and poor fume - gathering effect. In addition, the oil mesh of the existing top - suction type range hoods is often exposed to the air for a long time, with low aesthetic degree and easy to accumulate dust. After the dust is mixed with the grease, it will increase the cleaning difficulty. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the cooking fumes of the top - suction type range hood are easy to escape in the prior art, so as to provide a range hood that can reduce the escape of cooking fumes and improve the fume - suction effect.

[0004] To solve the above - mentioned technical problem, a range hood provided by the present invention includes:

[0005] A range hood body;

[0006] An oil mesh, disposed on the range hood body;

[0007] A smoke - guiding plate, movably connected to the range hood body, the smoke - guiding plate having an initial state in which at least part of it covers the oil mesh, and a working state in which a space is provided for the oil mesh; and

[0008] A guiding part, adapted to guide the smoke - guiding plate to switch between the working state and the initial state relative to the range hood body; when the smoke - guiding plate switches from the initial state to the working state, its first end extends downward along the height direction.

[0009] Optionally, the smoke - guiding plate includes:

[0010] A back plate, configured as the main body part of the smoke - guiding plate; and

[0011] Side plates, disposed on at least one side of the back plate along the width direction.

[0012] Optionally, it further includes: a smoke - collecting hood, at least part of the area of the smoke - collecting hood is penetrated to form the oil mesh;

[0013] The smoke collecting hood is formed by inward depression of the lower surface of the range hood body.

[0014] Optionally, the smoke collecting hood is configured as an arc surface, and the smoke guiding plate is configured as a structure matching the shape of the smoke collecting hood.

[0015] Optionally, in the working state, the first end of the smoke guiding plate is located at a position lower than the lower surface of the range hood body in the height direction; the second end of the smoke guiding plate is at least partially arranged in coincidence with the range hood body.

[0016] Optionally, in the initial state, both the first end and the second end of the smoke guiding plate are located at positions not lower than the lower surface of the range hood body in the height direction.

[0017] Optionally, the range hood body includes: a limiting platform, which is adapted to limit the second end of the smoke guiding plate when the smoke guiding plate moves from the working state to the initial state.

[0018] Optionally, one end of the guiding part is connected to the range hood body, and the other end is connected to the smoke guiding plate, and the guiding part is movably connected to the range hood body and / or the smoke guiding plate.

[0019] Optionally, the guiding part includes a telescopic push rod, and the telescopic push rod is arranged between the outer surface of the smoke guiding plate and the inner surface of the range hood body; both ends of the guiding part are rotatably connected to the smoke guiding plate and the range hood body respectively.

[0020] Optionally, it further includes:

[0021] An oil cup, at least partially configured as a groove structure, and arranged at a position relatively below the first end of the smoke guiding plate in the height direction; the oil cup is rotatably connected to the smoke guiding plate, and the lowest point of the inner surface of the oil cup is always lower than the upper edge position.

[0022] Optionally, it further includes:

[0023] A smoke sensing module, adapted to detect the oil fume concentration; the smoke sensing module is arranged on the range hood body and / or the smoke guiding plate.

[0024] The present invention provides a control method for a range hood, including:

[0025] When the range hood is in the standby state, turn on the smoke sensing module;

[0026] Based on the oil fume concentration obtained by the smoke sensing module, control the position state of the smoke guiding plate.

[0027] Optionally, controlling the position state of the smoke guide plate based on the oil fume concentration obtained by the smoke sensor module includes:

[0028] When the oil fume concentration is greater than C1, adjust the smoke guide plate to the working state;

[0029] When the oil fume concentration is less than C2, adjust the smoke guide plate to the initial state; where C1 > C2.

[0030] The technical solution of the present invention has the following advantages:

[0031] 1. The range hood provided by the present invention, by providing a smoke guide plate movably connected to the range hood body, and when the smoke guide plate is switched from the initial state to the working state, its first end extends downward along the height direction, thereby increasing the contact time between the oil fume and the smoke guide plate, invisibly increasing the condensation area of the flue gas, improving the filtering effect of the flue gas, and achieving the effect of combining the top - suction range hood and the side - suction range hood.

[0032] 2. The range hood provided by the present invention, the smoke guide plate has an initial state that at least partially covers the oil mesh, and a working state that forms a clearance for the oil mesh. When not in use, the oil mesh is covered to avoid the oil mesh being exposed to the air for a long time, reducing the possibility of the oil mesh accumulating dust and reducing the cleaning difficulty after the dust is mixed with the grease; in addition, covering the oil mesh in the non - working state can improve the overall aesthetics of the range hood and improve the user experience; at the same time, when in the working state, moving the smoke guide plate can improve the filtering effect of the flue gas; through the movable setting of the smoke guide plate, the combination of improving the aesthetics and increasing the practicality is well achieved.

[0033] 3. The range hood provided by the present invention, by providing a back plate and arranging side plates on at least one side along the width direction of the back plate, adopting the form of combining the back plate and the side plates, the smoke guide plate forms a funnel - like structure, which can have a better smoke gathering effect, reduce the probability of the flue gas escaping along both sides of the smoke guide plate, improve the smoke gathering effect of the range hood, and further ensure the oil fume suction effect.

[0034] 4. The range hood provided by the present invention, by constructing the smoke collecting hood into an arc surface and also constructing the smoke guide plate into an arc structure, thus facilitating the cooperation between the two, improving the fitting degree between the smoke guide plate and the smoke collecting hood in the initial state, and facilitating the rotation of the smoke guide plate relative to the smoke collecting hood, avoiding jamming, and improving the smoothness of the relative movement.

[0035] 5. The range hood provided by the present invention, by at least partially overlapping the second end of the smoke guide plate with the range hood body, thereby reducing the generation of gaps, ensuring the smoke suction effect, and ensuring that the movement of the smoke guide plate relative to the range hood body does not exceed the limit position, ensuring a smooth recovery.

[0036] 6. The range hood provided by the present invention, when in the initial state, both the first end and the second end of the smoke guide plate are located in a position not lower than the lower surface of the range hood body along the height direction, so that in the non-working state, the smoke guide plate can be well hidden, improving the aesthetic degree. At the same time, in the non-working state, the oil mesh is covered, playing a role in blocking dust, avoiding contact between dust and oil stains, and reducing the cleaning difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a three-dimensional view of the initial state of the range hood of the present invention;

[0039] Figure 2 It is a cross-sectional schematic view of the initial state of the range hood of the present invention;

[0040] Figure 3 It is a three-dimensional view of the working state of the range hood of the present invention;

[0041] Figure 4 It is a cross-sectional view of the working state of the range hood of the present invention;

[0042] Figure 5 It is a front view of the working state of the range hood of the present invention.

[0043] Description of the reference numerals:

[0044] 1 - Smoke collecting hood, 11 - Oil mesh, 2 - Smoke guide plate, 21 - Back plate, 22 - Side plate, 3 - Guiding part, 4 - Oil cup, 5 - Smoke sensing module, 6 - Range hood body, 61 - Limiting platform. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0047] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0049] Embodiment 1

[0050] Combined with Figures 1 - 5 As shown, the range hood provided in this embodiment includes:

[0051] Range hood body 6;

[0052] Oil mesh 11, arranged on the range hood body 6;

[0053] Smoke guide plate 2, movably connected to the range hood body 6. The smoke guide plate 2 has an initial state in which at least part of it covers the oil mesh 11, and a working state in which it forms a clearance for the oil mesh 11; and

[0054] Guide part 3, adapted to guide the smoke guide plate 2 to switch between the working state and the initial state relative to the range hood body 6; when the smoke guide plate 2 switches from the initial state to the working state, its first end extends downward along the height direction.

[0055] The range hood provided in this embodiment, by setting the smoke guide plate 2 movably connected to the range hood body 6, and when the smoke guide plate 2 switches from the initial state to the working state, its first end extends downward along the height direction, thereby increasing the contact time between the fumes and the smoke guide plate 2, invisibly increasing the condensation area of the fumes, improving the filtering effect of the fumes, and achieving the effect of combining a top - suction range hood and a side - suction range hood.

[0056] Preferably, the smoke guide plate 2 may specifically be made of glass or metal material.

[0057] For the range hood provided in this embodiment, the smoke guide plate 2 has an initial state of at least partially covering the oil mesh 11 and a working state of forming a clearance for the oil mesh 11. When not in use, the oil mesh 11 is covered to avoid long-term exposure of the oil mesh to the air, reduce the possibility of dust accumulation on the oil mesh, and lower the cleaning difficulty after the mixture of dust and grease; in addition, covering the oil mesh in the non-working state can improve the overall aesthetics of the range hood and enhance the user experience; at the same time, in the working state, moving the smoke guide plate 2 can improve the filtering effect of the flue gas; through the movable setting of the smoke guide plate 2, the combination of improving aesthetics and increasing practicality is well achieved.

[0058] Preferably, the guiding portion 3 may be a hydraulic rod, a rotating shaft, a crank and connecting rod structure, etc. connected between the smoke guide plate 2 and the range hood body 6, or may be a guide rail and a guide groove structure provided on one of the smoke guide plate 2 and the range hood body 6 and the other.

[0059] Specifically, in combination with Figure 3 as shown, the smoke guide plate 2 includes:

[0060] a back plate 21 configured as the main body part of the smoke guide plate 2; and

[0061] side plates 22 arranged on at least one side of the back plate 21 along the width direction.

[0062] Preferably, in this embodiment, side plates 22 are respectively arranged on the left and right sides of the back plate 21. The material of the back plate 21 is preferably glass, and the side plates 22 may be made of glass or plastic material.

[0063] For the range hood provided in this embodiment, by providing the back plate 21 and arranging the side plates 22 on at least one side along the width direction of the back plate 21, in the form of the combination of the back plate 21 and the side plates 22, the smoke guide plate 2 is in a funnel-shaped structure form, which can have a better smoke gathering effect, reduce the probability of the flue gas escaping along both sides of the smoke guide plate, improve the smoke gathering effect of the range hood, and further ensure the oil fume extraction effect.

[0064] Specifically, the range hood further includes: a smoke collecting hood 1, at least part of the area of the smoke collecting hood 1 penetrates to form the oil mesh 11;

[0065] The smoke collecting hood 1 is formed by inward depression from the lower surface of the range hood body 6.

[0066] In this embodiment, the smoke collecting hood 1 and the oil net 11 are of an integral structure. By arranging a grid-like or net-like structure on the smoke collecting hood 1 to form the oil net 11, it plays a role in filtering oil fumes. And in this embodiment, the smoke collecting hood 1 is formed by inward depression from the lower surface of the range hood body 6, thereby improving the smoke gathering effect and facilitating better smoke collection.

[0067] Specifically, in combination with Figure 4 as shown, the smoke collecting hood 1 is configured as an arc surface, and the smoke guiding plate 2 is configured as a structure matching the shape of the smoke collecting hood 1.

[0068] For the range hood provided in this embodiment, by configuring the smoke collecting hood 1 as an arc surface and configuring the smoke guiding plate 2 as an arc structure as well, it is convenient for the two to cooperate, improves the fitting degree between the smoke guiding plate 2 and the smoke collecting hood 1 in the initial state, and facilitates the rotation of the smoke guiding plate 2 relative to the smoke collecting hood 1, avoiding jamming and improving the smoothness of relative movement.

[0069] Preferably, the smoke collecting hood 1 is designed as an arc surface. Since the smoke collecting hood 1 and the oil net 11 are integrally designed, that is, the oil net 11 is also in the form of an arc surface structure.

[0070] Preferably, in this embodiment, the smoke guiding plate 2 and the oil net 11 overlap and are closely attached, that is, the oil net 11 and the smoke guiding plate are concentric arc fittings. By installing a concentric arc smoke guiding plate that can cover the oil net below the oil net, when not working, the smoke guiding plate 2 and the oil net are attached together and retracted in the smoke collecting hood. After starting to work, the smoke guiding plate rotates relative to the smoke collecting hood to form a clearance for the oil net 11. At the same time, the first end of the smoke guiding plate 2 extends downward along the height direction, and the second end is flush with the lowermost end of the smoke collecting hood. By arranging the smoke guiding plate longitudinally, the contact area with the oil fumes can be increased, the oil separation degree is improved, and the smoke gathering and guiding effects are further enhanced, preventing the escape of oil fumes.

[0071] Specifically, in combination with Figure 4 as shown, in the working state, the first end of the smoke guiding plate 2 is located at a position lower than the lower surface of the range hood body 6 along the height direction; at least part of the second end of the smoke guiding plate 2 coincides with the range hood body 6.

[0072] For the range hood provided in this embodiment, by making at least part of the second end of the smoke guiding plate 2 coincide with the range hood body 6, the generation of gaps is reduced, the smoking effect is ensured, and the movement of the smoke guiding plate 2 relative to the range hood body 6 does not exceed the limit position, ensuring smooth recovery.

[0073] Specifically, in combination with Figure 2As shown, in the initial state, both the first end and the second end of the smoke guide plate 2 are located in a position not lower than the lower surface of the range hood body 6 along the height direction.

[0074] For the range hood provided in this embodiment, in the initial state, both the first end and the second end of the smoke guide plate 2 are located in a position not lower than the lower surface of the range hood body 6 along the height direction, so that in the non - working state, the smoke guide plate 2 can be well hidden, improving the aesthetic degree. At the same time, in the non - working state, the oil screen 11 is covered, playing a role in blocking dust, avoiding the contact between dust and oil stains, and reducing the cleaning difficulty.

[0075] Specifically, in combination with Figure 1 As shown, the range hood body 6 includes: a limit platform 61. When the smoke guide plate 2 moves from the working state to the initial state, the limit platform 61 is adapted to limit the second end of the smoke guide plate 2.

[0076] Preferably, in this embodiment, there is a protruding step on each of the left and right sides of the range hood body 6 along the width direction, thus forming the limit platform 61. The limit platform 61 limits the smoke guide plate 2, that is, when the second end of the smoke guide plate adheres to the step limit position of the range hood body 6, it stops moving. At this time, both the first side and the second side of the smoke guide plate are flush with the lower surface of the range hood body 6, improving the aesthetic degree.

[0077] Specifically, one end of the guiding part 3 is connected to the range hood body 6, and the other end is connected to the smoke guide plate 2. The guiding part 3 is movably connected to the range hood body 6 and / or the smoke guide plate 2.

[0078] Specifically, in combination with Figure 3 As shown, the guiding part 3 includes a telescopic push rod, and the telescopic push rod is arranged between the outer surface of the smoke guide plate 2 and the inner surface of the range hood body 6; both ends of the guiding part 3 are rotatably connected to the smoke guide plate 2 and the range hood body 6 respectively.

[0079] In this embodiment, two push rods are hinged and fixed on the left and right sides of the range hood body 6, that is, one end of the two push rods is hinged and fixed on the inner side wall of the range hood body 6, and the other end is hinged on the outer edges of the left and right sides of the smoke guide plate. Preferably, one of the two push rods is an active telescopic push rod, and the other is a driven telescopic push rod. During the startup process, the active telescopic push rod starts to rotate around the hinge point with the smoke collecting hood under electric control, and while rotating, it also starts to extend at a certain speed. The driven telescopic push rod also moves synchronously and drives the smoke guide plate to rotate along the arc surface of the oil screen until the second end of the smoke guide plate is flush with the bottom of the range hood body 6, then the rotation stops.

[0080] Preferably, in this embodiment, the smoke guide plate rotates 90 degrees around the center of the circle.

[0081] As a variant, a slide rail can be directly made on the oil net, and pulleys are installed on both sides of the smoke guide plate to control the rotation of the smoke guide plate, replacing the active telescopic push rod and the driven telescopic push rod.

[0082] Specifically, the range hood further includes:

[0083] An oil cup 4, at least partially constructed in a groove-like structure, and arranged at a position relatively below the first end of the smoke guide plate 2 along the height direction; the oil cup 4 is rotatably connected to the smoke guide plate 2, and the lowest point of the inner surface of the oil cup 4 is always lower than the upper edge position.

[0084] Preferably, the oil cup 4 can guide the grease condensed on the smoke guide plate into the oil cup for collection. The oil cup 4 rotates with the rotation of the smoke guide plate, so that the oil cup always remains in a horizontal state to avoid oil spillage.

[0085] Specifically, in combination with Figure 1 as shown, the range hood further includes:

[0086] A smoke sensor module 5, adapted to detect the concentration of cooking fumes; the smoke sensor module 5 is arranged on the range hood body 6 and / or the smoke guide plate 2.

[0087] Preferably, in this example, the smoke sensor module 5 is installed at the middle position of the second end of the smoke guide plate 2 to detect cooking fumes.

[0088] As a specific working mode of the range hood provided in this embodiment, when the range hood is turned on and working, by controlling the movement of the guiding part 3, the smoke guide plate 2 is driven to rotate relative to the oil net 11, so that the smoke guide plate 2 is adjusted from the initial state to the working state. Most of the cooking fumes can be guided upwards by the turned-down smoke guide plate through the arc-shaped concave back plate 21, and the side plates 22 on both sides also prevent the cooking fumes from escaping. And during the smoke guiding process, by using a large-area smoke guide plate as a condensation plate, a part of the grease can also be separated out and then flow into the oil cup through the inner wall of the arc, so as to achieve the effects of gathering smoke and separating cooking fumes.

[0089] Embodiment Two

[0090] This embodiment provides a control method for the range hood described in Embodiment One, including:

[0091] When the range hood is in the standby state, turn on the smoke sensor module;

[0092] Based on the concentration of cooking fumes obtained by the smoke sensor module, control the position state of the smoke guide plate.

[0093] Specifically, controlling the position state of the smoke guide plate based on the oil fume concentration obtained by the smoke sensor module includes:

[0094] When the oil fume concentration is greater than C1, adjust the smoke guide plate to the working state;

[0095] When the oil fume concentration is less than C2, adjust the smoke guide plate to the initial state; where C1 > C2.

[0096] When the range hood is in the standby state, turn on the smoke sensor module. If the smoke sensor module detects oil fume and reaches a certain concentration C1, it will automatically control the synchronous opening of the smoke guide plate and at the same time control the fan in the range hood to turn on for smoke exhaust. When it detects that the oil fume concentration drops below C2, it will automatically close the smoke guide plate and stop the fan. C1 > C2.

[0097] Additionally, the opening and closing of the smoke guide plate 2 can be controlled separately to facilitate subsequent cleaning.

[0098] Obviously, the above embodiments are only examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A top-suction range hood, characterized in that, Comprising: A range hood body (6); An oil mesh (11) provided on the range hood body (6); A smoke guide plate (2) movably connected to the range hood body (6), the smoke guide plate (2) having an initial state in which at least part of it covers the oil mesh (11), and a working state in which a clearance is formed for the oil mesh (11); and A guiding portion (3) adapted to guide the smoke guide plate (2) to switch between the working state and the initial state relative to the range hood body (6); when the smoke guide plate (2) switches from the initial state to the working state, its first end extends downward in the height direction; Further comprising: A smoke collecting hood (1), the smoke collecting hood (1) being formed by inward depression from the lower surface of the range hood body (6); The smoke collecting hood (1) is configured as an arc-shaped surface, and the smoke guide plate (2) is configured as a structure matching the shape of the smoke collecting hood (1).

2. The top-suction range hood according to claim 1, wherein, The smoke guide plate (2) includes: A back plate (21) configured as the main body part of the smoke guide plate (2); and Side plates (22) provided on at least one side of the back plate (21) in the width direction.

3. The top-suction range hood according to claim 1, wherein, At least part of the area of the smoke collecting hood (1) is penetrated to form the oil mesh (11).

4. The top-suction range hood according to claim 3, characterized in that, In the working state, the first end of the smoke guide plate (2) is located at a position lower than the lower surface of the range hood body (6) in the height direction; at least part of the second end of the smoke guide plate (2) coincides with the range hood body (6).

5. The top-suction range hood according to claim 4, wherein, In the initial state, both the first end and the second end of the smoke guide plate (2) are located at positions not lower than the lower surface of the range hood body (6) in the height direction.

6. The top-suction range hood according to claim 5, characterized in that, The range hood body (6) includes: A limiting platform (61), when the smoke guide plate (2) moves from the working state to the initial state, the limiting platform (61) is adapted to limit the second end of the smoke guide plate (2).

7. The top-suction range hood according to any one of claims 1-6, characterized in that, One end of the guiding portion (3) is connected to the range hood body (6), and the other end is connected to the smoke guide plate (2), and the guiding portion (3) is movably connected to the range hood body (6) and / or the smoke guide plate (2).

8. The top-suction range hood according to claim 7, characterized in that, The guiding portion (3) includes a telescopic push rod, the telescopic push rod is arranged between the outer surface of the smoke guide plate (2) and the inner surface of the range hood body (6); both ends of the guiding portion (3) are rotatably connected to the smoke guide plate (2) and the range hood body (6) respectively.

9. The top-suction range hood according to any one of claims 1-6, characterized in that, Further comprising: An oil cup (4), at least part of which is configured as a trough-shaped structure and is arranged at a position relatively below the first end of the smoke guide plate (2) in the height direction; the oil cup (4) is rotatably connected to the smoke guide plate (2), and the lowest point of the inner surface of the oil cup (4) is always lower than the upper edge position.

10. The top-suction range hood according to any one of claims 1-6, characterized in that, Further comprising: A smoke sensing module (5) adapted to detect the concentration of cooking fumes; the smoke sensing module (5) is arranged on the range hood body (6) and / or the smoke guide plate (2).

11. A control method for an oil fume extractor, characterized in that, Applied to the top-suction range hood according to any one of claims 1 to 10 above, the method includes: When the range hood is in the standby state, turn on the smoke sensing module; Based on the oil fume concentration obtained by the smoke sensor module, control the position state of the smoke guide plate.

12. The control method of the range hood according to claim 11, characterized in that, The controlling the position state of the smoke guide plate based on the oil fume concentration obtained by the smoke sensor module includes: When the oil fume concentration is greater than C1, adjust the smoke guide plate to the working state; When the oil fume concentration is less than C2, adjust the smoke guide plate to the initial state; where C1 > C2.

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