Range hood

Abstract

The utility model relates to the technical field of kitchen appliances, and discloses a range hood. The range hood comprises an exhaust fume collecting hood, a filter screen assembly and a baffle assembly, the filter screen assembly is arranged at a fume inlet of the exhaust fume collecting hood, the filter screen assembly comprises a first filter screen and a second filter screen which form an angle and are rotationally connected, and the first filter screen and the second filter screen are each provided with a plurality of fume inlet holes allowing oil fume to pass through; the first filter screen and the second filter screen are movably connected to the two ends of the exhaust fume collecting hood respectively; the baffle assembly is arranged at the smoke inlet of the smoke collecting hood and located below the filter screen assembly, the baffle assembly comprises a first baffle and a second baffle which form an angle and are rotationally connected, and the first baffle and the second baffle are movably connected to the two ends of the smoke collecting hood respectively. The baffle of the range hood sinks, the negative pressure area sinks, and the oil smoke suction effect is improved; the baffle assembly and the filter screen assembly are of a double-layer structure, the baffle assembly is located below the filter screen assembly, oil smoke enters the exhaust fume collecting hood from the periphery, and the oil smoke is effectively prevented from escaping from the peripheral edge of the exhaust fume collecting hood.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen appliance technical field especially, relates to a kind of range hood. BACKGROUND

[0002] Range hood is the electrical equipment widely used in modern kitchen, which can collect and exhaust the oil fume generated in the cooking process to the outdoor to improve the environment in the kitchen.

[0003] The existing top suction type range hood is far from the cooking bench, and its air inlet is directly connected with the air duct. As a result, the negative pressure distribution area is mainly concentrated near the air inlet, and the negative pressure of the edge of the smoke collecting hood is small. In the cooking process, the oil fume is easy to escape from the edge of the smoke collecting hood, causing the surface of the furniture such as cabinet around the range hood to be oily, which increases the difficulty of cleaning the kitchen and affects the user's experience.

[0004] Therefore, there is an urgent need for a range hood to solve the above technical problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a range hood which can effectively prevent oil fume from escaping from the edge of the smoke collecting hood and has good oil fume suction effect.

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

[0007] A range hood comprises:

[0008] A smoke collecting hood;

[0009] A filter screen assembly is arranged at the smoke inlet of the smoke collecting hood, and comprises a first filter screen and a second filter screen which are connected at an angle and rotatably connected. The first filter screen and the second filter screen are both provided with a plurality of smoke inlets for oil fume to pass through, and the first filter screen and the second filter screen are movably connected at both ends of the smoke collecting hood, respectively.

[0010] A baffle assembly is arranged at the smoke inlet of the smoke collecting hood and below the filter screen assembly. The baffle assembly comprises a first baffle and a second baffle which are connected at an angle and rotatably connected. The first baffle and the second baffle are movably connected at both ends of the smoke collecting hood, respectively.

[0011] As a preferred technical solution of the above range hood, the first filter screen and the second filter screen are rotatably connected to the smoke collecting hood, respectively.

[0012] The first filter screen and the second filter screen are both made of elastic material. When the first filter screen and / or the second filter screen are stretched and deformed, the air inlet area of the smoke inlet is increased.

[0013] As the preferred technical scheme of the above-mentioned range hood, the first filter screen can make a combined motion of sliding and rotating relative to the smoke collecting cover, and the second filter screen can make a combined motion of sliding and rotating relative to the smoke collecting cover.

[0014] As the preferred technical scheme of the above-mentioned range hood, the first baffle can make a combined motion of sliding and rotating relative to the smoke collecting cover, and the second baffle can make a combined motion of sliding and rotating relative to the smoke collecting cover.

[0015] As the preferred technical scheme of the above-mentioned range hood, the range hood further comprises:

[0016] A driving assembly is connected to the smoke collecting cover, and is used to drive the filter screen assembly and / or the baffle assembly to move, so as to change the included angle of the filter screen assembly and / or the included angle of the baffle assembly, thereby changing the sectional area of the air inlet passage between the filter screen assembly and the baffle assembly according to different air inlet amounts.

[0017] As the preferred technical scheme of the above-mentioned range hood, the driving assembly comprises a first driving unit, which is used to drive the filter screen assembly and the baffle assembly to move.

[0018] As the preferred technical scheme of the above-mentioned range hood, the driving assembly comprises a first driving unit and a second driving unit, the first driving unit is used to drive the filter screen assembly to move, and the second driving unit is used to drive the baffle assembly to move.

[0019] As the preferred technical scheme of the above-mentioned range hood, the lowest point of the baffle assembly is located directly below the lowest point of the filter screen assembly.

[0020] A range hood comprises:

[0021] A smoke collecting cover;

[0022] A first filter screen assembly is arranged at the smoke inlet of the smoke collecting cover, and comprises a first filter screen and a second filter screen which are connected at an angle and can rotate, a plurality of smoke inlet holes are arranged on the first filter screen and the second filter screen for oil fume to pass through, and the first filter screen and the second filter screen are respectively movably connected to two ends of the smoke collecting cover.

[0023] A second filter screen assembly is arranged at the smoke inlet of the smoke collecting cover and below the first filter screen assembly, and comprises a third filter screen and a fourth filter screen which are connected at an angle and can rotate, a plurality of smoke inlet holes are arranged on the third filter screen and the fourth filter screen for oil fume to pass through, and the third filter screen and the fourth filter screen are respectively movably connected to two ends of the smoke collecting cover.

[0024] As the preferred technical scheme of the above-mentioned range hood, the first filter screen and the third filter screen are located on the same side and are non-parallel; and / or, the second filter screen and the fourth filter screen are located on the same side and are non-parallel.

[0025] The range hood of the utility model, including fume collecting cover, filter screen subassembly and baffle subassembly, filter screen subassembly sets up at the fume inlet of fume collecting cover, filter screen subassembly includes the first filter screen and second filter screen of angle and rotation connection, first filter screen and second filter screen all are equipped with a plurality of fume inlet for oil fume to pass through, first filter screen and second filter screen are respectively movably connected in the both ends of fume collecting cover;Baffle subassembly sets up at the fume inlet of fume collecting cover and is located below filter screen subassembly, baffle subassembly includes the first baffle and second baffle of angle and rotation connection, first baffle and second baffle are respectively movably connected in the both ends of fume collecting cover.The structure compares to prior art, the baffle of range hood sinks, negative pressure area sinks, and the effect of oil fume suction is improved;Baffle subassembly and filter screen subassembly are double-layer structure, baffle subassembly is located below filter screen subassembly, oil fume enters fume collecting cover from all around, effectively prevent oil fume from escaping from the periphery edge of fume collecting cover, thereby avoiding the surface of the surrounding cabinet and other furniture of oil, reduce the cleaning difficulty of kitchen, thereby improving the use satisfaction of user.In addition, since the first filter screen and the second filter screen are rotationally connected, the included angle between the first filter screen and the second filter screen can be changed, and similarly, since the first baffle and the second baffle are rotationally connected, the included angle between the first baffle and the second baffle can be changed, when the oil fume concentration changes or the range hood gear changes, the included angle of the filter screen assembly and / or the included angle of the baffle assembly can be adjusted, thereby changing the air inlet area to adapt to different use scenarios and improve the adaptability of the range hood. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 is the cross-sectional structure schematic view of the range hood of the utility model embodiment one under the first state;

[0027] Fig. 2 is the cross-sectional structure schematic view of the range hood of the utility model embodiment one under the second state;

[0028] Fig. 3 is the cross-sectional structure schematic view of the range hood of the utility model embodiment one under the third state.

[0029] In the drawing:

[0030] 1, fume collecting cover;2, first filter screen;3, second filter screen;4, first baffle;5, second baffle;6, first drive unit;7, second drive unit;8, oil cup. DETAILED DESCRIPTION

[0031] In order to make the above object, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners without departing from the spirit of the present application. Those skilled in the art will appreciate the scope of the present application and can make similar modifications without departing from the spirit of the present application. Therefore, the present application is not limited by the embodiments disclosed below.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0033] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0034] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0037] Example one

[0038] As shown in Figs. 1 to 3 The present application provides a range hood, specifically a top suction range hood. The range hood includes a smoke collecting hood 1, a filter screen assembly and a baffle assembly. The filter screen assembly is arranged at the smoke inlet of the smoke collecting hood 1, and includes a first filter screen 2 and a second filter screen 3 which are angularly and rotatably connected. The first filter screen 2 and the second filter screen 3 are both provided with a plurality of smoke inlet holes for oil fume to pass through, and are respectively movably connected to the two ends of the smoke collecting hood 1. The baffle assembly is arranged at the smoke inlet of the smoke collecting hood 1 and below the filter screen assembly, and includes a first baffle 4 and a second baffle 5 which are angularly and rotatably connected. The first baffle 4 and the second baffle 5 are respectively movably connected to the two ends of the smoke collecting hood 1.

[0039] Compared with the prior art, the baffle of the range hood sinks, the negative pressure area sinks, and the oil fume suction effect is improved; the baffle assembly and the filter screen assembly are in a double-layer structure, the baffle assembly is located below the filter screen assembly, oil fume enters the smoke collecting hood 1 from all around, effectively preventing oil fume from escaping from the edges of the smoke collecting hood 1, thereby avoiding the surface of the surrounding cabinet and other furniture from being covered with oil, reducing the cleaning difficulty of the kitchen, and thereby improving the use satisfaction of the user. In addition, since the first filter screen 2 and the second filter screen 3 are rotationally connected, the included angle between the first filter screen 2 and the second filter screen 3 can be changed, and similarly, since the first baffle 4 and the second baffle 5 are rotationally connected, the included angle between the first baffle 4 and the second baffle 5 can be changed, when the oil fume concentration changes or the range hood gear changes, the included angle of the filter screen assembly and / or the included angle of the baffle assembly can be adjusted, thereby changing the air inlet area to adapt to different use scenarios and improve the adaptability of the range hood.

[0040] Optionally, the first filter screen 2 and the second filter screen 3 are connected in a V shape, and the first baffle 4 and the second baffle 5 are also connected in a V shape.

[0041] In this embodiment, the range hood further comprises a driving assembly connected to the smoke collecting hood 1, the driving assembly being used to drive the filter screen assembly and / or the baffle assembly to move, so as to change the included angle of the filter screen assembly and / or the included angle of the baffle assembly, thereby changing the cross-sectional area of the air inlet passage between the filter screen assembly and the baffle assembly with different air inlet amounts, and further adapting to different use scenarios.

[0042] The first filter screen 2 and the second filter screen 3 are hingedly connected, and the first baffle 4 and the second baffle 5 are hingedly connected. The driving assembly can include one driving unit to synchronously drive the filter screen assembly and the baffle assembly to move; the driving assembly can also include two driving units, the two driving units respectively driving the filter screen assembly and the baffle assembly to move individually, and the two driving units are not linked.

[0043] When the driving assembly includes one driving unit, the one driving unit being a first driving unit 6, the first driving unit 6 being used to drive the filter screen assembly and the baffle assembly to move. The connection mode of the first driving unit 6 and the filter screen assembly and the baffle assembly can be but is not limited to the following three modes: the first mode, the output end of the first driving unit 6 being connected to the hinged joints of the first filter screen 2 and the second filter screen 3, the hinged joints of the first filter screen 2 and the second filter screen 3 and the hinged joints of the first baffle 4 and the second baffle 5 being connected through a connecting rod; the second mode, the output end of the first driving unit 6 being connected to the hinged joints of the first baffle 4 and the second baffle 5, the hinged joints of the first filter screen 2 and the second filter screen 3 and the hinged joints of the first baffle 4 and the second baffle 5 being connected through a connecting rod; the third mode, the hinged joints of the first filter screen 2 and the second filter screen 3 and the hinged joints of the first baffle 4 and the second baffle 5 being respectively connected to different positions of the output end of the first driving unit 6.

[0044] When the driving assembly comprises two driving units, the two driving units are respectively a first driving unit 6 and a second driving unit 7, the first driving unit 6 is used to drive the filter screen assembly to move, and the second driving unit 7 is used to drive the baffle assembly to move. The output end of the first driving unit 6 is connected to the hinged joint of the first filter screen 2 and the second filter screen 3, and the output end of the second driving unit 7 is connected to the hinged joint of the first baffle 4 and the second baffle 5. The setting positions of the first driving unit 6 and the second driving unit 7 can be, but are not limited to, the following two modes: first, the first driving unit 6 and the second driving unit 7 are both arranged on the smoke hood 1; second, the first driving unit 6 is arranged on the smoke hood 1, and the second driving unit 7 is arranged at the hinged joint of the first filter screen 2 and the second filter screen 3. The second setting mode is preferred in the embodiment. It can be understood that the first driving unit 6 and the second driving unit 7 are controlled separately, the respective driving ends can be extended simultaneously or in sequence, and the extension lengths can be the same or different, which can be controlled according to actual conditions.

[0045] The driving unit in the embodiment can be a push rod motor, a linear output cylinder, a linear output motor, etc. The push rod motor is preferred in the embodiment, which has low noise, small energy consumption and large thrust in use. It should be noted that all mechanisms capable of achieving linear driving are within the protection scope of the application.

[0046] The first filter screen 2 and the second filter screen 3 are symmetrically arranged about a vertical plane, and the first baffle 4 and the second baffle 5 are symmetrically arranged about the vertical plane. In this way, the negative pressure area can be uniformly distributed, and when the oil fume enters the inside of the smoke hood 1 from all around, the symmetrically arranged first filter screen 2 and the second filter screen 3 can make the flow rate of the oil fume uniform and consistent, effectively reducing the noise.

[0047] In the embodiment, the baffle assembly is located directly below the filter screen assembly, that is, the lowest point of the baffle assembly is located directly below the lowest point of the filter screen assembly. The lowest point of the baffle assembly is the hinged joint of the first baffle 4 and the second baffle 5, and the lowest point of the filter screen assembly is the hinged joint of the first filter screen 2 and the second filter screen 3. This structure can shorten the stroke of the driving assembly, improve the mechanical efficiency of the driving assembly, and simplify the assembly difficulty.

[0048] On the basis of the above structure, the first driving unit 6 is arranged in the vertical direction, and the output end thereof reciprocates in the vertical direction, thereby driving the first filter screen 2 and the second filter screen 3 to rotate symmetrically, that is, the rotation angle of the first filter screen 2 and the rotation angle of the second filter screen 3 are the same. The second driving unit 7 is also arranged in the vertical direction, and the output end thereof reciprocates in the vertical direction, thereby driving the first baffle 4 and the second baffle 5 to rotate symmetrically, that is, the rotation angle of the first baffle 4 and the rotation angle of the second baffle 5 are the same.

[0049] In the embodiment, the first filter screen 2 and the second filter screen 3 are respectively rotationally connected to the smoke collecting hood 1 to realize the change of the included angle therebetween. Alternatively, the first filter screen 2 and the second filter screen 3 are both made of elastic material, and when the first filter screen 2 and / or the second filter screen 3 is stretched and deformed, the air inlet area of the air inlet hole is increased, thereby increasing the air inlet amount and improving the oil fume suction effect.

[0050] In other possible embodiments, the first filter screen 2 can make a combined sliding and rotating movement relative to the smoke collecting hood 1, and the second filter screen 3 can make a combined sliding and rotating movement relative to the smoke collecting hood 1. In this structure, when the included angle between the first filter screen 2 and the second filter screen 3 changes, the air inlet area of the filter screen assembly also changes, thereby adapting to different use scenarios.

[0051] In the embodiment, the first baffle 4 can make a combined sliding and rotating movement relative to the smoke collecting hood 1, and the second baffle 5 can make a combined sliding and rotating movement relative to the smoke collecting hood 1. In this structure, when the included angle between the first baffle 4 and the second baffle 5 changes, the position and range of the negative pressure area change, thereby adapting to different use scenarios. The implementation structure of the sliding movement can be, but is not limited to, a sliding rail and sliding block structure, which is relatively common and will not be described here.

[0052] In the embodiment, the range hood further comprises an oil cup 8, which is arranged at the lowest point of the baffle assembly, i.e., the hinge point of the first baffle 4 and the second baffle 5. Oil dirt flows along the inner wall and the outer wall of the baffle assembly to the oil cup 8 for collection, facilitating centralized pouring and disposal.

[0053] The range hood further comprises an oil fume concentration sensor (not shown) arranged on the smoke collecting hood 1 or the baffle assembly, which is used to detect the oil fume concentration. When the range hood gear is low and the oil fume concentration is low (this state is referred to as a first state), the angle of the baffle assembly and the angle of the filter screen assembly are as shown in FIG. 6, at this time, the baffle assembly and the filter screen assembly are almost parallel. Fig. 1 When the range hood gear is medium and the oil fume concentration is medium (this state is referred to as a second state), the angle of the baffle assembly and the angle of the filter screen assembly are as shown in FIG. 7, at this time, the cross-sectional area of the air inlet passage between the filter screen assembly and the baffle assembly gradually increases from the middle to both sides. Fig. 2 When the range hood gear is high and the oil fume concentration is high (this state is referred to as a third state), the angle of the baffle assembly and the angle of the filter screen assembly are as shown in FIG. 8, at this time, the cross-sectional area of the air inlet passage between the filter screen assembly and the baffle assembly gradually decreases from the middle to both sides, so that a large amount of oil fume flows to the middle, thereby improving the oil fume suction effect. Fig. 3

[0054] ​With the above structure, it can be seen that when the range of the extractor hood is high and the concentration of the oil fume is high, the angle of the baffle assembly and the angle of the filter screen assembly are both increased, at this time, the flow channel width (the distance between the filter screens and the baffle on the same side) is widened, the first filter screen and the second filter screen are stretched, the smoke inlet holes thereon are also enlarged, the air inlet area of the smoke inlet holes is increased, thereby increasing the air inlet amount and significantly improving the oil fume suction effect.

[0055] Embodiment Two

[0056] The embodiment provides an oil fume extractor, which is different from the oil fume extractor in Embodiment One in that a double-layer filter screen structure is arranged.

[0057] Specifically, the oil fume extractor comprises a smoke collecting hood, a first filter screen assembly and a second filter screen assembly, wherein the first filter screen assembly is arranged at a smoke inlet of the smoke collecting hood, the first filter screen assembly comprises a first filter screen and a second filter screen which are connected at an angle and rotatably, the first filter screen and the second filter screen are both provided with a plurality of smoke inlet holes for oil fume to pass through, and the first filter screen and the second filter screen are movably connected at two ends of the smoke collecting hood respectively; the second filter screen assembly is arranged at the smoke inlet of the smoke collecting hood and below the first filter screen assembly, the second filter screen assembly comprises a third filter screen and a fourth filter screen which are connected at an angle and rotatably, the third filter screen and the fourth filter screen are both provided with a plurality of smoke inlet holes for oil fume to pass through, and the third filter screen and the fourth filter screen are movably connected at two ends of the smoke collecting hood respectively.

[0058] The oil fume extractor in the embodiment is provided with double-layer filter screen assemblies at the smoke inlet of the smoke collecting hood, compared with the baffle structure, almost all the oil fume can enter from the front of the smoke inlet, thereby reducing the oil fume diffused to the surroundings, further reducing the phenomenon that the oil fume escapes from the periphery of the smoke collecting hood, and improving the working efficiency of the oil fume extractor.

[0059] The first filter screen and the third filter screen are located on the same side and are not parallel; and / or, the second filter screen and the fourth filter screen are located on the same side and are not parallel. The two layers of filter screens on the same side are not parallel, which can effectively improve the speed of the oil fume entering the interior of the smoke collecting hood, reduce the disturbance and play a rectifying role. In the embodiment, the first filter screen and the third filter screen are not parallel, and the second filter screen and the fourth filter screen are not parallel.

[0060] In the embodiment, the first filter screen assembly and the second filter screen assembly are both connected with the smoke collecting hood in the form of being pulled, when the push rod motor pushes the filter screen assembly downward, the first filter screen, the second filter screen, the third filter screen and the fourth filter screen are all stretched, the smoke inlet holes thereon are also enlarged, the air inlet area of the smoke inlet holes is increased, thereby increasing the air inlet amount and significantly improving the oil fume suction effect.

[0061] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For the ordinary skilled in the art, according to the idea of the present application, the specific implementation modes and application ranges will have changes, and the content of the specification should not be understood as limiting the present application. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A range hood characterized by, Comprising: a fume hood (1); a filter screen assembly arranged at the fume inlet of the fume hood (1), the filter screen assembly comprising a first filter screen (2) and a second filter screen (3) which are angularly and rotatably connected, the first filter screen (2) and the second filter screen (3) are both provided with a plurality of fume inlet holes for oil fume to pass through, the first filter screen (2) and the second filter screen (3) are respectively movably connected at two ends of the fume hood (1); and a baffle assembly arranged at the fume inlet of the fume hood (1) and located below the filter screen assembly, the baffle assembly comprising a first baffle (4) and a second baffle (5) which are angularly and rotatably connected, the first baffle (4) and the second baffle (5) are respectively movably connected at two ends of the fume hood (1).

2. The extractor hood according to claim 1, wherein the first filter screen (2) and the second filter screen (3) are respectively rotatably connected to the fume hood (1); the first filter screen (2) and the second filter screen (3) are both made of elastic material, and when the first filter screen (2) and / or the second filter screen (3) are stretched and deformed, the air inlet area of the fume inlet holes is increased.

3. The extractor hood according to claim 1, wherein the first filter screen (2) can make a combined motion of sliding and rotating relative to the fume hood (1), and the second filter screen (3) can make a combined motion of sliding and rotating relative to the fume hood (1).

4. The extractor hood according to claim 1, wherein the first baffle (4) can make a combined motion of sliding and rotating relative to the fume hood (1), and the second baffle (5) can make a combined motion of sliding and rotating relative to the fume hood (1).

5. The hood according to any one of claims 1-4, characterized in that, The extractor hood further comprises: a driving assembly connected to the fume hood (1), the driving assembly being used to drive the filter screen assembly and / or the baffle assembly to move, so as to change the included angle of the filter screen assembly and / or the included angle of the baffle assembly, thereby changing the cross-sectional area of the air inlet passage between the filter screen assembly and the baffle assembly with different air inlet amounts.

6. The extractor hood according to claim 5, wherein the driving assembly comprises a first driving unit (6), the first driving unit (6) being used to drive the filter screen assembly and the baffle assembly to move.

7. The extractor hood according to claim 5, wherein the driving assembly comprises a first driving unit (6) and a second driving unit (7), the first driving unit (6) being used to drive the filter screen assembly to move, and the second driving unit (7) being used to drive the baffle assembly to move.

8. The extractor hood according to any one of claims 1-4, wherein the lowest point of the baffle assembly is located directly below the lowest point of the filter screen assembly.

9. A range hood characterized by, Comprising: a fume hood (1); A first filter screen assembly is arranged at the smoke inlet of the smoke hood (1), and comprises a first filter screen (2) and a second filter screen (3) which are angularly and rotatably connected. The first filter screen (2) and the second filter screen (3) are both provided with a plurality of smoke inlets for oil fume to pass through. The first filter screen (2) and the second filter screen (3) are respectively movably connected to the two ends of the smoke hood (1). A second filter screen assembly is arranged at the smoke inlet of the smoke hood (1) and below the first filter screen assembly. The second filter screen assembly comprises a third filter screen and a fourth filter screen which are angularly and rotatably connected. The third filter screen and the fourth filter screen are both provided with a plurality of smoke inlets for oil fume to pass through. The third filter screen and the fourth filter screen are respectively movably connected to the two ends of the smoke hood (1).

10. The extractor hood according to claim 9, characterized in that the first filter screen (2) and the third filter screen are located on the same side and are not parallel; and / or the second filter screen (3) and the fourth filter screen are located on the same side and are not parallel.

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