Turnover plate with flow blocking function and range hood
By designing a guide airfoil surface on the flap, the problem of oil smoke overflowing from the edge of the flap is solved, achieving a more efficient oil smoke absorption effect and improving the user's cooking experience.
Patent Information
- Application Number
- CN202422188829.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-06
AI Technical Summary
The flaps of existing range hoods and integrated stoves easily cause oil smoke to overflow from the edges during the rising process of oil smoke, affecting the oil smoke extraction effect.
A flap with a flow-blocking function is designed, comprising a flap body and a wing plate. The wing plate has a guide airfoil surface, which protrudes in a direction away from the installation plane, thereby blocking the flow of oil smoke and reducing the escape of oil smoke from the edge of the flap.
By improving the flap structure, the amount of oil smoke escaping can be reduced, the oil smoke absorption effect can be improved, and the user's cooking experience can be enhanced.
Smart Images
Figure CN222992986U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of kitchen appliances, and particularly relates to a flap with a flow-blocking function and a range hood. Background Art
[0002] During the cooking process, a large amount of oil fume is generated. If a user is in an oil fume environment for a long time, it will damage the user's physical health. Moreover, the oil fume generated during cooking will adhere to kitchen utensils and walls, making the cleaning difficult. Therefore, most families will install a freestanding range hood or an integrated stove to alleviate this situation. Among them, the oil fume suction principles of the oil fume suction modules of the freestanding range hood and the integrated stove are basically the same. An air inlet is provided on the smoke collecting hood, and then a fan is provided in the smoke collecting hood. The fan generates a negative pressure area to capture the oil fume so as to suck the oil fume into the smoke collecting hood.
[0003] Whether it is a freestanding range hood or the oil fume suction module of an integrated stove, most of them are provided with a flap at the air inlet of the smoke collecting hood. The flap is rotatably arranged on the smoke collecting hood, and the flap has an open position for opening the air inlet and a closed position for closing the air inlet. When the oil fume rises, it impacts the flap. Due to the wall attachment flow effect, the oil fume will disperse forward, backward, left and right along the wall surface of the flap, resulting in the oil fume overflowing from the edge of the flap and causing a poor smoking effect.
[0004] Therefore, there is an urgent need for a flap with a flow-blocking function to solve the above problems. Summary of the Utility Model
[0005] An object of the present application is to solve or at least alleviate part or all of the above problems. To this end, an object of the present application is to provide a flap with a flow-blocking function and a range hood.
[0006] To achieve the above object, the present application adopts the following technical solutions:
[0007] In a first aspect, there is provided a flap with a flow-blocking function for a range hood. The flap with a flow-blocking function includes:
[0008] A flap body having a first edge, a first side and a second side. The first side is connected to one end of the first edge, and the second side is connected to the other end of the first edge and is disposed opposite to the first side. The first edge is rotatably mounted on the smoke collecting hood of the range hood;
[0009] Wing plates are provided on the inner surface of the flap body near the first side and / or the second side. The wing plates have a mounting plane and a guiding airfoil surface. The mounting plane is connected to the inner surface of the flap body, and the guiding airfoil surface protrudes in a direction away from the mounting plane. The protruding height of the guiding airfoil surface near the periphery of the flap body is higher than the protruding height of the other positions.
[0010] As an alternative to the flap with a flow blocking function, the distance Dy between the guiding airfoil surface and the mounting plane gradually increases first and then gradually decreases in the direction from the outer edge close to the flap body towards the inside of the flap body.
[0011] As an alternative to the flap with a flow blocking function, the mounting plane is arranged parallel to the inner surface of the flap body, and the gap t between the mounting plane and the inner surface of the flap body is: 0 mm ≤ t ≤ 40 mm.
[0012] As an alternative to the flap with a flow blocking function, the angle β1 between the wing plate close to the first side edge and the first side edge is 5° ≤ β1 ≤ 45°.
[0013] As an alternative to the flap with a flow blocking function, the angle β2 between the wing plate close to the second side edge and the second side edge is 5° ≤ β2 ≤ 45°.
[0014] As an alternative to the flap with a flow blocking function, it further includes a link mechanism. The link mechanism includes a first rod, a second rod, a third rod, a fourth rod and an elastic member. The inner surface of the flap body has a first pivot position, and one end of the first rod and one end of the second rod are both pivotally connected to the first pivot position by a pivot; the mounting plane of the wing plate has a second pivot position, and one end of the third rod and one end of the fourth rod are both pivotally connected to the second pivot position by a pivot; the other end of the first rod is pivotally connected to the other end of the third rod by a first rotating shaft, and the other end of the second rod is pivotally connected to the other end of the fourth rod by a second rotating shaft; one end of the elastic member is connected to the first rotating shaft, and the other end thereof is connected to the second rotating shaft.
[0015] As an alternative to the flap with a flow blocking function, it further includes a flow blocking plate. The flap body further has a second edge opposite to the first edge, and the second edge is rotatably connected to one end of the flow blocking plate.
[0016] As an alternative to the flap with a flow blocking function, it further includes a flow blocking plate driving mechanism. The flow blocking plate driving mechanism is used to drive the flow blocking plate to rotate relative to the flap body, so that the flow blocking plate has a first position with an angle θ1 with the flap body, a second position with an angle θ2 with the flap body, and a third position folded on the lower surface of the flap body, where 90° ≤ θ2 < θ1 < 180°.
[0017] As an alternative to the flap with a flow blocking function, the range of θ1 is 150° < θ1 < 180°; and / or
[0018] The range of θ2 is 90° ≤ θ2 ≤ 150°.
[0019] In a second aspect, a range hood is provided, including:
[0020] A smoke collecting hood, the smoke collecting hood having an air inlet;
[0021] The flap with a flow blocking function as described above is rotatably installed on the smoke collecting hood;
[0022] A flap driving mechanism is used to drive the flap with a flow blocking function to rotate relative to the air inlet, so that the flap with a flow blocking function has an open position for opening the air inlet and a closed position for closing the air inlet.
[0023] The beneficial effects of this application are as follows:
[0024] The flap with a flow blocking function provided in this application includes a flap main body and wing plates. The flap main body has a first edge, a first side and a second side. The first side is connected to one end of the first edge, and the second side is connected to the other end of the first edge and is disposed opposite to the first side. The first edge is rotatably installed on the smoke collecting hood of the range hood; wing plates are provided at positions on the inner surface of the flap main body close to the first side and / or the second side. The wing plates have an installation plane and a flow guiding airfoil surface. The installation plane is connected to the inner surface of the flap main body, and the flow guiding airfoil surface protrudes in a direction away from the installation plane. The protruding height of the flow guiding airfoil surface close to the periphery of the flap main body is higher than that of other positions. This flow guiding airfoil surface can block the flow of oil fume to reduce the escape amount of oil fume at the edge of the flap main body and improve the oil fume suction effect.
[0025] The range hood provided in this application can reduce the escape amount of oil fume overflow by applying the above-mentioned flap with a flow blocking function, improve the oil fume suction effect of the range hood, and enhance the user's cooking experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments of this application. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of this application and these drawings.
[0027] Figure 1 Shows a schematic structural diagram of the range hood provided in this application in one direction;
[0028] Figure 2 Shows a schematic structural diagram of the range hood provided in this application in another direction;
[0029] Figure 3 Shows based on Figure 1 a fluid simulation schematic diagram of the flap;
[0030] Figure 4 Shows a schematic structural diagram of a flap provided in this application in one direction;
[0031] Figure 5 shows the schematic structural diagram of the flap in another direction in Figure 4 ;
[0032] Figure 6 shows the Figure 4 schematic structural diagram of the middle wing plate in
[0033] Figure 7 shows the schematic structural diagram of another exemplary flap provided by the present application;
[0034] Figure 8 shows the Figure 7 schematic structural diagram of the middle wing plate in
[0035] Reference numerals:
[0036] 100, smoke collecting hood; 101, air inlet; 200, flap; 300, flap driving mechanism;
[0037] 1, flap main body; 11, first edge; 12, second edge; 13, first side; 14, second side;
[0038] 2, baffle; 21, guiding bump;
[0039] 3, wing plate; 3a, first wing plate; 3b, second wing plate; 31, mounting plane; 32, guiding airfoil surface;
[0040] 4, link mechanism; 41, first rod; 42, second rod; 43, third rod; 44, fourth rod; 45, elastic member. Detailed implementation manners
[0041] Before explaining any implementation manner of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings.
[0042] In the present application, the terms "include", "comprise", "have" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including such element.
[0043] In this application, the term "and / or" describes the relationship between related objects and indicates that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, both A and B exist simultaneously, and B exists alone. Additionally, in this application, the character " / " generally indicates that the related objects before and after are in an "and / or" relationship.
[0044] In this application, the terms "connect", "combine", "couple", and "mount" can be direct connections, combinations, couplings, or mounts, or they can be indirect connections, combinations, couplings, or mounts. Here, for example, a direct connection means that two parts or components are connected together without an intermediate member, and an indirect connection means that two parts or components are each connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings and can include electrical connections or couplings.
[0045] In this application, those of ordinary skill in the art will understand that relative terms used in conjunction with a quantity or condition (such as "about", "approximately", "substantially", etc.) are intended to include the stated value and have the meaning indicated by the context. For example, such relative terms at least include the degree of error associated with the measurement of a particular value, tolerances caused by manufacturing, assembly, use, etc. associated with a particular value. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. A relative term can refer to a plus or minus a certain percentage (such as 1%, 5%, 10% or more) of the indicated value. A numerical value without a relative term should also be disclosed as a particular value with a tolerance. Additionally, when "substantially" expresses a relative angular positional relationship (such as substantially parallel, substantially perpendicular), it can refer to a plus or minus a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) from the indicated angle.
[0046] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.
[0047] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", and "rear" are described based on the orientation and positional relationship shown in the drawings, and should not be construed as limiting the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one component is connected "above" or "below" another component, it can not only be directly connected "above" or "below" another component, but also be indirectly connected "above" or "below" another component through an intermediate component. It should also be understood that the orientation terms such as the upper side, the lower side, the left side, the right side, the front side, and the rear side not only represent the positive orientation, but can also be understood as the side orientation. For example, the lower side can include directly below, lower left, lower right, lower front, and lower rear, etc.
[0048] Figure 1 The schematic structural diagram of the range hood provided by this application in one direction is shown. Figure 2 The schematic structural diagram of the range hood provided by this application in another direction is shown. As Figures 1 to 2 shown, the range hood provided by this application includes a smoke collecting hood 100, a flap 200, and a flap driving mechanism 300. Among them, the smoke collecting hood 100 has an air inlet 101; the flap 200 is rotatably installed on the smoke collecting hood 100, and the flap driving mechanism 300 is used to drive the flap 200 with a flow blocking function to rotate relative to the air inlet 101, so that the flap 200 with a flow blocking function has an open position for opening the air inlet 101 and a closed position for closing the air inlet 101. When the range hood is in the working state, the flap driving mechanism 300 drives the flap 200 to rotate counterclockwise to open the air inlet 101 of the smoke collecting hood 100, so that the cooking fumes can enter the smoke collecting hood 100 from the air inlet 101; when the cooking is over or the user feels that there is no need to continue sucking fumes, the range hood can be turned off. At this time, the flap driving mechanism 300 can drive the flap 200 to rotate clockwise to close the air inlet 101 of the smoke collecting hood 100.
[0049] It can be understood that the range hood provided by this application can be used as an independent range hood or as a part of an integrated stove, and this is not limited here.
[0050] Figure 3 The schematic diagram based on Figure 1 the fluid simulation of the flap 200 is shown. As Figure 3 Combined with Figure 2 shown, when the cooking fumes impact the flap 200, a part of the cooking fumes (see the thin line arrows in Figure 3 ) flow into the interior of the flap 200, and this part is captured by the negative pressure area at the air inlet 101 of the smoke collecting hood 100 and smoothly enters the air inlet 101 of the smoke collecting hood 100. The rest of the cooking fumes (see Figure 3The medium-thick line arrow) flows towards the edge of the flap 200 and finally overflows the flap 200, unable to be captured by the negative pressure area of the air inlet 101, resulting in oil fume leakage.
[0051] To solve the above problems, the present application provides a new flap 200. By improving the structure of the flap 200, the amount of oil fume escaping from the edge of the flap 200 can be reduced, and the oil fume extraction efficiency of the range hood can be improved.
[0052] Figure 4 The schematic structural diagram of a flap 200 provided by the present application in one direction is shown. Figure 5 Shown is Figure 4 the schematic structural diagram of the flap 200 in another direction. As Figures 4 to 5 shown, the flap 200 provided by the present application includes a flap main body 1 and wing plates 3. Among them, the flap main body 1 has a first edge 11, a first side 13, and a second side 14. The first side 13 is connected to one end of the first edge 11, the second side 14 is connected to the other end of the first edge 11 and is arranged opposite to the first side 13. The first edge 11 is rotatably installed on the smoke collecting hood 100 of the range hood; wing plates 3 are provided at positions on the inner surface of the flap main body 1 (referring to the surface of the flap main body 1 facing the air inlet 101) close to the first side 13 and the second side 14. The wing plates 3 have an installation plane 31 and a flow guiding airfoil surface 32. The installation plane 31 is connected to the inner surface of the flap main body 1, and the flow guiding airfoil surface 32 protrudes in a direction away from the installation plane 31. The protruding height of the flow guiding airfoil surface 32 near the periphery of the flap main body 1 is higher than the protruding height of the remaining positions. The flow guiding airfoil surface 32 can block the flow of oil fume to reduce the amount of oil fume escaping from the edge of the flap main body 1 and improve the oil fume extraction effect.
[0053] For easy understanding, the wing plate 3 close to the first side 13 is denoted as the first wing plate 3a, and the wing plate 3 close to the second side 14 is denoted as the second wing plate 3b. Among them, the protruding height of the flow guiding airfoil surface 32 of the first wing plate 3a near the first side 13 is higher than the protruding height of the remaining positions, and the protruding height of the flow guiding airfoil surface 32 of the second wing plate 3b near the second side 14 is higher than the protruding height of the remaining positions. With such a setting, the first wing plate 3a and the second wing plate 3b can be used to guide the oil fume flowing towards the two sides of the flap main body 1 to prevent the oil fume on both sides of the flap main body 1 from escaping and improve the oil fume extraction efficiency.
[0054] In an embodiment, the installation plane 31 is arranged parallel to the inner surface of the flap body 1, and the gap t between the installation plane 31 and the inner surface of the flap body 1 is: 0mm ≤ t ≤ 40mm. For example, it can be 0mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, etc., to ensure that there can be an air flow from the outside of the flap body 1 to the inside of the flap body 1 between the installation plane 31 and the inner surface of the flap body 1. This part of the air flow can play a certain guiding effect on the lampblack below the flap body 1, so as to avoid the escape and diffusion of lampblack outward and improve the lampblack absorption efficiency.
[0055] When the gap t between the installation plane 31 and the inner surface of the flap body 1 is greater than 0mm, for example, when t is greater than or equal to 3mm, due to the gap between the installation plane 31 and the inner surface of the flap body 1, the air flow outside the flap body 1 will flow into the flap body 1 from this gap under the influence of the negative pressure area of the range hood. This part of the air flow will produce a trailing edge jet effect, and then play a traction effect on the lampblack on both sides of the flap body 1, which can further improve the lampblack absorption efficiency of the range hood.
[0056] In an embodiment, the angle β1 between the wing plate 3 close to the first side 13 and the first side 13 is 5° ≤ β1 ≤ 45°; the angle β2 between the wing plate 3 close to the second side 14 and the second side 14 is 5° ≤ β2 ≤ 45°. With such a setting, a pressure difference can be generated by the air flow to enhance the trailing edge jet effect and the entrainment flow effect at the wing plate 3, which can further improve the smoke blocking effect of the wing plate 3, reduce the probability of lampblack escaping and diffusing outward, and improve the lampblack absorption effect.
[0057] Figure 6 Shows Figure 4 The structural schematic diagram of the middle wing plate 3. As Figure 6 Combined with Figure 5 As shown, the distance Dy between the guide vane airfoil surface 32 and the installation plane 31 first gradually increases and then gradually decreases along the direction from the outer edge of the flap body 1 to the inside of the flap body 1. With such a setting, the guide vane airfoil surface 32 can generate an entrainment flow effect, and the entrainment flow can be used to traction the lampblack at the edge of the flap body 1 to prevent the lampblack from overflowing and diffusing, and improve the lampblack absorption effect.
[0058] The cross-sectional shape of the wing plate 3 is rectangular, and the longitudinal cross-sectional shape of the wing plate 3 at any position is the same, so as to ensure that the flow blocking effect of the flap body 1 in its length direction is equivalent, ensure that the generation position of the entrainment flow is equivalent, and further improve the lampblack absorption efficiency of the range hood.
[0059] Continue as Figures 4 to 5As shown, the flap 200 further includes a flow blocking plate 2. The flap body 1 further has a second edge 12 disposed opposite to the first edge 11. The second edge 12 is rotatably connected to one end of the flow blocking plate 2. The flow blocking plate 2 is provided with a flow guiding bump 21. The flow guiding surface of the flow guiding bump 21 can generate an entrainment effect. The entrained flow can draw the oil fume at the edge of the flap body 1 to prevent the oil fume from overflowing and diffusing, and improve the oil fume suction effect.
[0060] In an embodiment, the flap 200 further includes a flow blocking plate driving mechanism. The flow blocking plate driving mechanism is used to drive the flow blocking plate 2 to rotate relative to the flap body 1, so that the flow blocking plate 2 has a first position with an included angle θ1 with the flap body 1, a second position with an included angle θ2 with the flap body 1, and a third position folded on the lower surface of the flap body 1, where 90° ≤ θ2 < θ1 < 180°. This design can not only adjust the included angle between the flow blocking plate 2 and the flap body 1 according to the working gear of the range hood to meet different gear requirements, but also fold the flow blocking plate 2 on the inner surface of the flap body 1, so as to retract the flap 200 to the position of closing the air inlet 101 when the range hood is closed.
[0061] In an embodiment, the range of θ1 is 150° < θ1 < 180°; the range of θ2 is 90° ≤ θ2 ≤ 150°. When the range hood is in the low gear, it means that the amount of oil fume is small, and the user pursues a noise experience, and the smoking effect can meet the requirements. At this time, the flow blocking plate 2 is adjusted to the first position, and the included angle θ1 between the flow blocking plate 2 and the flap body 1 in this first position state is 150° < θ1 < 180°; at this time, the flow blocking plate 2 mainly serves as an extension of the flap body 1, mainly playing a role in gathering oil fume, and the entrainment flow intensity is average. When the range hood is in the high gear, it means that the amount of oil fume is large, and the user needs to improve the smoking effect. At this time, the flow blocking plate 2 is adjusted to the second position, and the included angle θ2 between the flow blocking plate 2 and the flap body 1 in this second position state is 90° ≤ θ2 ≤ 150°; at this time, the flow blocking plate 2 not only serves as an extension of the flap body 1, playing a role in gathering oil fume, but also generates a strong entrainment flow to prevent the oil fume from escaping. When the range hood is in the stir-fry gear, it means that the amount of oil fume is the largest. At this time, the fan of the range hood is in the working state of the maximum power, and the oil fume suction effect of the range hood can meet the user's needs, and there is no need to further block the oil fume with the flow blocking plate 2. At this time, the flow blocking plate 2 is adjusted to the third position, and the included angle between the flow blocking plate 2 and the flap body 1 in this third position state is approximately 0°.
[0062] Figure 7 The structural schematic diagram of another exemplary flap 200 provided by the present application is shown. Figure 8 Shows Figure 7 The structural schematic diagram of the middle wing plate 3. As Figures 7 to 8 And in combination with Figure 5As shown, the flap 200 further includes a connecting rod mechanism 4, which includes a first rod 41, a second rod 42, a third rod 43, a fourth rod 44 and an elastic member 45. The inner surface of the flap body 1 has a first pivoting position, and one end of the first rod 41 and one end of the second rod 42 are both pivotally connected to the first pivoting position; the mounting plane 31 of the wing plate 3 has a second pivoting position, and one end of the third rod 43 and one end of the fourth rod 44 are both pivotally connected to the second pivoting position; the other end of the first rod 41 is pivotally connected to the other end of the third rod 43 through a first rotating shaft, and the other end of the second rod 42 is pivotally connected to the other end of the fourth rod 44 through a second rotating shaft; one end of the elastic member 45 is connected to the first rotating shaft, and the other end thereof is connected to the second rotating shaft. In one embodiment, the elastic member 45 can be a tension spring.
[0063] During the operation of the range hood, the connecting rod mechanism 4 is provided to elastically connect the wing plate 3 to the inner surface of the flap body 1. When the flap body 1 is in the closed position to close the air inlet 101, the wing plate 3 can compress the elastic member 45 under the action of the smoke collecting hood 100, so as to facilitate the retraction of the flap body 1; when the flap body 1 is in the open position, the elastic member 45 is in a retracted state to keep the wing plate 3 away from the inner surface of the flap body 1, so that a gap is set between the wing plate 3 and the inner surface of the flap body 1, so as to generate a trailing edge jet effect and improve the fume absorbing effect.
[0064] It can be seen from the above example that a wing plate 3 is provided on the inner surface of the flap body 1, and the airflow entering from the side of the flap body 1 is pulled by the wake generated by the wing plate 3 to resist the overflow of oil smoke; a connecting rod mechanism 4 is provided to realize the storage and deployment of the wing plate 3. After the wing plate 3 is deployed, a trailing edge jet is formed to enhance the resistance to the overflow of oil smoke, thereby solving the problem of oil smoke overflowing from the leading edge and both sides of the flap 200.
[0065] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.
Claims
1. A flap with a flow-blocking function, used in a range hood, characterized in that: The flap with flow blocking function comprises: A flap body (1), the flap body (1) comprising a first edge (11), a first side edge (13) and a second side edge (14), the first side edge (13) being connected to one end of the first edge (11), the second side edge (14) being connected to the other end of the first edge (11) and being arranged opposite to the first side edge (13), the first edge (11) being rotatably mounted on a smoke collecting hood (100) of the range hood; A wing plate (3), the wing plate (3) is provided on the inner surface of the flap body (1) near the first side edge (13) and / or the second side edge (14), the wing plate (3) having a mounting plane (31) and a guide airfoil surface (32), the mounting plane (31) being connected to the inner surface of the flap body (1), the guide airfoil surface (32) protruding in a direction away from the mounting plane (31), and the protruding height of the guide airfoil surface (32) near the periphery of the flap body (1) is higher than the protruding height at other positions.
2. The flap with flow blocking function according to claim 1, characterized in that: The distance Dy between the guide airfoil surface (32) and the mounting plane (31) first gradually increases and then gradually decreases along the direction from the outer edge of the flap body (1) toward the interior of the flap body (1).
3. The flap with flow blocking function according to claim 1, characterized in that: The installation plane (31) is arranged parallel to the inner surface of the flap body (1), and the gap t between the installation plane (31) and the inner surface of the flap body (1) is: 0mm≤t≤40mm.
4. The flap with flow blocking function according to claim 1, characterized in that: An included angle β1 between the wing plate (3) close to the first side edge (13) and the first side edge (13) is 5°≤β1≤45°.
5. The flap with flow blocking function according to claim 1, characterized in that: An included angle β2 between the wing plate (3) close to the second side edge (14) and the second side edge (14) is 5°≤β2≤45°.
6. The flap with flow blocking function according to any one of claims 1 to 5, characterized in that: The invention also comprises a connecting rod mechanism (4), wherein the connecting rod mechanism (4) comprises a first rod (41), a second rod (42), a third rod (43), a fourth rod (44) and an elastic member (45); the inner surface of the flap body (1) has a first pivoting position, one end of the first rod (41) and one end of the second rod (42) are both pivotally connected to the first pivoting position; the mounting plane (31) of the wing plate (3) has a second pivoting position, one end of the third rod (43) and one end of the fourth rod (44) are both pivotally connected to the second pivoting position; the other end of the first rod (41) is pivotally connected to the other end of the third rod (43) via a first rotating shaft, and the other end of the second rod (42) is pivotally connected to the other end of the fourth rod (44) via a second rotating shaft; one end of the elastic member (45) is connected to the first rotating shaft, and the other end thereof is connected to the second rotating shaft.
7. The flap with flow blocking function according to any one of claims 1 to 5, characterized in that: It also comprises a spoiler (2), wherein the flap body (1) further comprises a second edge (12) arranged opposite to the first edge (11), and the second edge (12) is rotatably connected to one end of the spoiler (2).
8. The flap with flow blocking function according to claim 7, characterized in that: It also includes a spoiler driving mechanism, which is used to drive the spoiler (2) to rotate relative to the flap body (1) so that the spoiler (2) has a first position with an angle of θ1 between it and the flap body (1), a second position with an angle of θ2 between it and the flap body (1), and a third position folded on the lower surface of the flap body (1), wherein 90°≤θ2<θ1<180°.
9. The flap with flow blocking function according to claim 8, characterized in that: The range of θ1 is 150°<θ1<180°; and / or The range of θ2 is 90°≤θ2≤150°.
10. A range hood, characterized in that: include: A smoke collecting hood (100), wherein the smoke collecting hood (100) has an air inlet (101) ； The flap with a flow-blocking function according to any one of claims 1 to 9, wherein the flap with a flow-blocking function is rotatably mounted on the smoke collecting hood (100); A flap driving mechanism (300), the flap driving mechanism (300) being used to drive the flap with a flow blocking function to rotate relative to the air inlet (101), so that the flap with a flow blocking function has an open position for opening the air inlet (101) and a closed position for closing the air inlet (101).