Range hood

Abstract

The utility model discloses a range hood. The turning plate mechanism of the range hood is used for closing or opening a smoke inlet in a shell, the turning plate mechanism comprises a first turning plate assembly and a second turning plate assembly, the first turning plate assembly is rotationally connected with the shell, and the second turning plate assembly is rotationally connected with the lower end of the first turning plate assembly; the output end of the driving assembly is connected with the second turning plate assembly; the second turning plate assembly is turned outwards before the first turning plate assembly, and when the second turning plate assembly is turned, the first turning plate assembly is kept still, so that the turning plate mechanism has a semi-open state that only the second turning plate assembly is opened; the second turning plate assembly can drive the first turning plate assembly to turn outwards together, so that the turning plate mechanism has a full-open state that the first turning plate assembly and the second turning plate assembly are both opened, and in the full-open state, the opening angle of the second turning plate assembly is larger than that of the first turning plate assembly. The range hood can adapt to different use working conditions and is simple in structure, the area of a smoke gathering area is enlarged, and the oil smoke suction effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a range hood. Background Technology

[0002] Range hoods are widely used electrical appliances in kitchens to remove cooking fumes. A typical range hood consists of a housing and a flap assembly. The housing has a smoke inlet. When the range hood is not in use, the flap assembly is closed, blocking the smoke inlet. When the range hood is in operation, the flap assembly flips outward, opening the smoke inlet, thus effectively trapping the smoke.

[0003] As people's living standards and demands for quality of life improve, they have higher requirements for the smoke extraction effect of range hoods. At the same time, they hope that range hoods can adapt their functions to the specific usage conditions, so that the needs for smoke extraction effect, energy saving, convenience, and appearance can be balanced accordingly.

[0004] To meet these requirements, some range hoods with multiple flaps have been introduced to the market. One type of flap assembly includes a first flap and a second flap, both of which flip outwards simultaneously at the same final opening angle. However, this results in a fixed smoke-gathering area, making it unsuitable for various usage scenarios. Another type of range hood features a first flap that can flip outwards at a certain angle relative to the casing, while the second flap can flip further outwards relative to the first, thus expanding the smoke-gathering area and ensuring better smoke collection. However, to achieve the sequential opening and closing of these multiple flaps, the transmission mechanism typically uses a multi-link structure, which is complex, difficult to disassemble and maintain, and occupies a large space, impacting the user experience.

[0005] Therefore, there is an urgent need for a range hood to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to propose a range hood that can realize the sequential opening of the second flap assembly and the first flap assembly, thereby adapting to a variety of application scenarios, and has a simple structure and good smoke extraction effect.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A range hood, comprising:

[0009] The casing has a smoke inlet on it;

[0010] A flap mechanism for closing or opening the smoke inlet, the flap mechanism including a first flap assembly and a second flap assembly, the first flap assembly being rotatably connected to the housing, and the second flap assembly being rotatably connected to the lower end of the first flap assembly; and,

[0011] A driving component, the output of which is connected to the second flap component;

[0012] The second flap assembly flips outward before the first flap assembly, and the first flap assembly remains stationary while the second flap assembly flips, so that the flap mechanism has a half-open state where only the second flap assembly is open; the second flap assembly can drive the first flap assembly to flip outward together, so that the flap mechanism has a fully open state where both the first and second flap assemblies are open, and in the fully open state, the opening angle of the second flap assembly is greater than the opening angle of the first flap assembly.

[0013] As a preferred technical solution for the above-mentioned range hood, the range hood further includes a limiting structure between the second flap assembly and the first flap assembly, wherein the second flap assembly drives the first flap assembly to flip together through the limiting structure.

[0014] As a preferred technical solution for the above-mentioned range hood, the first flap assembly includes a first flap and a first side baffle fixedly connected to the first flap, the second flap assembly includes a second flap and a second side baffle fixedly connected to the second flap, the first flap is rotatably connected to the housing, and the second flap is rotatably connected to the lower end of the first flap; the output end of the drive assembly is connected to the second side baffle, and a limiting structure is provided between the second side baffle and the first side baffle.

[0015] As a preferred technical solution for the above-mentioned range hood, the limiting structure includes a first limiting block disposed on one of the first side baffle and the second side baffle, and a second limiting block disposed on the other of the first side baffle and the second side baffle. During the outward opening stroke of the second flap, the first limiting block can abut against the second limiting block to drive the first flap to move outward.

[0016] As a preferred technical solution for the above-mentioned range hood, the first limiting block is provided with a first limiting inclined surface, and the second limiting block is provided with a second limiting inclined surface, wherein the first limiting inclined surface can abut against the second limiting inclined surface.

[0017] As a preferred technical solution for the above-mentioned range hood, the first limiting block is protruding on the side of the first side baffle facing the second side baffle, and the second limiting block is protruding on the end of the second side baffle away from the second flip plate towards the rotation center of the second flip plate.

[0018] As a preferred embodiment of the above-mentioned range hood, the first side baffle has a fan-shaped structure, and the rotation center of the first side baffle coincides with the rotation center of the first flap; and / or,

[0019] The second side baffle has a fan-shaped ring structure, and the rotation center of the second side baffle coincides with the rotation center of the second flap.

[0020] As a preferred technical solution for the above-mentioned range hood, the flip-plate mechanism further includes a tensioning member, one end of which is connected to the housing and the other end is connected to the first flip-plate or the first side baffle.

[0021] During the process of the flipping mechanism changing from the closed state to the half-open state, the tensioning member can keep the first flipping plate stationary; during the process of the flipping mechanism changing from the half-open state to the fully open state, the force of the driving component is greater than the tensioning force of the tensioning member, so that the second flipping plate drives the first flipping plate to flip outward.

[0022] As a preferred technical solution for the above-mentioned range hood, the tensioning component is a tension spring or an electromagnet.

[0023] As a preferred embodiment of the above-mentioned range hood, the first flap assembly is connected to the housing via a first hinge; and / or,

[0024] The second flap assembly is connected to the first flap assembly via a second hinge.

[0025] The beneficial effects of this utility model are:

[0026] The present invention relates to a range hood, comprising a housing, a flap mechanism, and a drive assembly. The housing has a smoke inlet. The flap mechanism is used to close or open the smoke inlet and includes a first flap assembly and a second flap assembly. The first flap assembly is rotatably connected to the housing, and the second flap assembly is rotatably connected to the lower end of the first flap assembly. The output end of the drive assembly is connected to the second flap assembly. The second flap assembly flips outward before the first flap assembly, and the first flap assembly remains stationary while the second flap assembly flips, so that the range hood has a half-open state where only the second flap assembly is open. The second flap assembly can drive the first flap assembly to flip outward together, so that the range hood has a fully open state where both the first and second flap assemblies are open. In the fully open state, the opening angle of the second flap assembly is greater than the opening angle of the first flap assembly.

[0027] This utility model of a range hood allows for the sequential opening of the first and second flap components, thus adapting to different oil fume concentrations and overall machine settings. This improves the range hood's adaptability to various working conditions. Compared to existing technologies, it expands the smoke inlet area, thereby increasing the smoke control area and significantly increasing the smoke intake, resulting in a marked improvement in smoke extraction efficiency and high user satisfaction. Furthermore, compared to the complex transmission structures in existing technologies, the drive component of this range hood is only connected to the second flap component. The flipping movement of the first flap component does not require a complex transmission mechanism; the second flap component, driven by the drive component, can drive the first flap component to flip. This results in a simple structure, easy disassembly and maintenance, small footprint, and a good user experience. Attached Figure Description

[0028] Figure 1 This is a cross-sectional structural diagram of the range hood in the closed state according to a specific embodiment of the present utility model;

[0029] Figure 2 This is a cross-sectional structural diagram of the range hood in a semi-open state according to a specific embodiment of the present utility model;

[0030] Figure 3 This is a cross-sectional structural diagram of the range hood in its fully open state according to a specific embodiment of the present utility model;

[0031] Figure 4 This is a schematic cross-sectional view of a portion of the range hood structure provided in a specific embodiment of this utility model. Figure 1 ;

[0032] Figure 5 This is a schematic cross-sectional view of a portion of the range hood structure provided in a specific embodiment of this utility model. Figure 2 .

[0033] In the picture:

[0034] 1. Housing; 2. Drive assembly; 3. First flap; 4. First side baffle; 5. Second flap; 6. Second side baffle; 7. First limiting block; 8. Second limiting block; 9. Tensioner; 10. First hinge; 11. Second hinge. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0041] like Figures 1 to 3 As shown, this embodiment provides a range hood, which includes a housing 1, a flap mechanism, and a drive assembly 2. The housing 1 has a smoke inlet. The flap mechanism is used to close or open the smoke inlet and includes a first flap assembly and a second flap assembly. The first flap assembly is rotatably connected to the housing 1, and the second flap assembly is rotatably connected to the lower end of the first flap assembly. The drive assembly 2 is disposed inside the housing 1, and its output end is connected to the second flap assembly. The second flap assembly flips outward before the first flap assembly, and the first flap assembly remains stationary while the second flap assembly flips, so that the flap mechanism has a half-open state where only the second flap assembly is open. The second flap assembly can drive the first flap assembly to flip outward together, so that the flap mechanism has a fully open state where both the first and second flap assemblies are open. In the fully open state, the opening angle of the second flap assembly is greater than the opening angle of the first flap assembly. In this embodiment, the smoke inlet faces forward. It should be noted that in this embodiment, the descriptions of front, back, left, right, up, and down directions are all relative to the user when the range hood is in use.

[0042] In this embodiment, the range hood allows the second and first flap components to open sequentially. The half-open state is suitable for situations with low oil fume concentration, while the fully open state is suitable for situations with high oil fume concentration. Therefore, this range hood can adapt to different oil fume concentrations and overall machine settings, improving its adaptability to different working conditions. Furthermore, in the fully open state, the opening angle of the second flap component is greater than that of the first flap component, which can expand the smoke inlet area, thereby expanding the smoke control area and significantly increasing the smoke intake, resulting in a noticeable improvement in smoke extraction efficiency. In addition, compared to the complex transmission structure in the prior art, the flipping movement of the first flap component of this range hood does not require a complex transmission mechanism. The second flap component, driven by the drive component 2, can drive the first flap component to flip. The structure is simple, easy to disassemble and maintain, occupies little space, and provides a good user experience.

[0043] To achieve the flipping motion of the first flap assembly, a limiting structure is provided between the second flap assembly and the first flap assembly. The second flap assembly drives the first flap assembly to flip together through the limiting structure. The drive assembly 2 is only connected to the second flap assembly and not to the first flap assembly. The flipping motion of the first flap assembly is achieved solely through the limiting structure. Compared to a complex linkage mechanism, this not only simplifies the structure and facilitates disassembly and maintenance but also reduces the space occupied.

[0044] The range hood in this embodiment achieves the sequential opening of the second and first flap assemblies by setting a limiting structure between the second flap assembly and the first flap assembly. Compared with the complex linkage assembly transmission structure in the prior art, the structure is simple, easy to disassemble and maintain, occupies little space, and has high user satisfaction.

[0045] Specifically, the first flap assembly includes a first flap 3 and a first side baffle 4 fixedly connected to the first flap 3. The second flap assembly includes a second flap 5 and a second side baffle 6 fixedly connected to the second flap 5. The first flap 3 is rotatably connected to the housing 1, and the second flap 5 is rotatably connected to the lower end of the first flap 3. The output end of the drive assembly 2 is connected to the second side baffle 6, and a limiting structure is provided between the second side baffle 6 and the first side baffle 4. Both the first side baffle 4 and the second side baffle 6 are located on the left and / or right side of the range hood, that is, the first side baffle 4 is perpendicular to the first flap 3, and the second side baffle 6 is perpendicular to the second flap 5. The output end of the drive assembly 2 is connected to the second side baffle 6 to drive the movement of the second flap 5 fixedly connected to the second side baffle 6. The second side baffle 6 drives the first side baffle 4 to move through the limiting structure, and the first side baffle 4 drives the first flap 3 fixedly connected to it to move. When the flip mechanism is opened, the second flip 5 first flips outward to a certain angle, and then drives the first flip 3 to flip outward through the limiting structure, so as to realize the sequential flipping of the first flip 3 and the second flip 5.

[0046] like Figure 4 and Figure 5 As shown, the limiting structure includes a first limiting block 7 disposed on one of the first side baffle 4 and the second side baffle 6, and a second limiting block 8 disposed on the other of the first side baffle 4 and the second side baffle 6. During the outward opening stroke of the second flap 5, the first limiting block 7 abuts against the second limiting block 8 to drive the first flap 3 to move outward. That is, the second side baffle 6 drives the first side baffle 4 to move through the limiting structure, and the first side baffle 4 drives the first flap 3, which is fixedly connected to it, to move. When the flap mechanism is opened, the driving component 2 drives the second flap 5 to flip outward through the second side baffle 6. When the second flap 5 rotates to a certain angle to the half-open state, the first limiting block 7 abuts against the second limiting block 8, thereby driving the first flap 3 to flip outward. The second flap 5 continues to flip outward together with the first flap 3 until it is fully open. In this embodiment, the first side baffle 4 is provided with the first limiting block 7, and the second side baffle 6 is provided with the second limiting block 8.

[0047] The first limiting block 7 is provided with a first limiting inclined surface, and the second limiting block 8 is provided with a second limiting inclined surface. The first limiting inclined surface can abut against the second limiting inclined surface. By using a surface-to-surface contact method, the reliability of the first limiting block 7 and the second limiting block 8 when they abut against each other is improved, thereby improving the movement reliability of the flip-plate mechanism.

[0048] A first limiting block 7 protrudes from the side of the first side baffle 4 facing the second side baffle 6, and a second limiting block 8 protrudes from the end of the second side baffle 6 away from the second flip plate 5 towards the rotation center of the second flip plate 5. In this embodiment, when the flip plate mechanism is in the closed state, the second side baffle 6 and the first side baffle 4 at least partially overlap, that is, in the left-right direction of the range hood, the two are arranged side by side and their projections on the plane perpendicular to the left-right direction at least partially overlap. Therefore, the first limiting block 7 protrudes from the side of the first side baffle 4 facing the second side baffle 6, and the second limiting block 8 is located at the end of the second side baffle 6 away from the second flip plate 5. With this structure, the second side baffle 6 can be flipped outward by a certain angle first, and then the second limiting block 8 abuts against the first limiting block 7, and then the first flip plate 3 is flipped outward by the first side baffle 4.

[0049] In this embodiment, the gap between the mounting surfaces of the first side baffle 4 and the second side baffle 6 is very small, and the two plate structures are almost fitted together. Therefore, the second limiting block 8 is coplanar with the second side baffle 6 but protrudes from the outer contour of the second side baffle 6. This ensures that during the process of the flipping mechanism changing from the closed state to the half-open state, there is no contact between the first side baffle 4 and the second side baffle 6, and the second limiting block 8 will not interfere with the outward flipping movement of the second side baffle 6. Along the height direction, the first limiting block 7 is located at or near the lowest point of the first side baffle 4 to prevent the first limiting block 7 from contacting the second limiting block 8 before the flipping mechanism reaches the half-open state, thereby ensuring the flipping angle of the second flipping plate 5.

[0050] Regarding the shape selection of the first side baffle 4, in this embodiment, the first side baffle 4 can be, but is not limited to, a fan-shaped structure. The rotation center of the first side baffle 4 coincides with the rotation center of the first flap 3, ensuring the structural connection strength and smooth and consistent rotation of the first flap 3 and the first side baffle 4.

[0051] Regarding the shape selection of the second side baffle 6, in this embodiment, the second side baffle 6 can be, but is not limited to, a fan-shaped ring structure, and the rotation center of the second side baffle 6 coincides with the rotation center of the second flap 5.

[0052] The first flap 3 includes a first flap body and a first decorative panel, with the first decorative panel covering the outer surface of the first flap body. The first flap body can be made of sheet metal with good strength, thus ensuring the overall structural strength of the first flap 3. The first decorative panel can be made of glass, which is not only aesthetically pleasing but also easy to clean. Optionally, the first flap body and the first decorative panel can be fixed together by adhesive.

[0053] Similarly, the second flap 5 includes a second flap body and a second decorative panel, with the second decorative panel covering the outer surface of the second flap body. The second flap body can be made of sheet metal with good strength, thereby ensuring the overall structural strength of the second flap 5. The second decorative panel can be made of glass, which is not only aesthetically pleasing but also easy to clean. Optionally, the second flap body and the second decorative panel can be fixed together by adhesive bonding.

[0054] In this embodiment, the first flap assembly is connected to the housing 1 via a first hinge 10 to achieve the flipping movement of the first flap assembly. Specifically, the first flap body and the first side baffle 4 are respectively connected to the first hinge 10. The second flap assembly is connected to the first flap assembly via a second hinge 11 to achieve the flipping movement of the second flap assembly. Specifically, the second flap body is connected to the second hinge 11. The hinge connection method has a simple structure, low cost, and is easy to implement.

[0055] To maintain the structural stability of the first flap 3 and prevent it from shaking, the flap mechanism also includes a tensioning member 9. One end of the tensioning member 9 is connected to the housing 1, and the other end is connected to the first flap 3 or the first side baffle 4. The tensioning member 9 exerts a certain tensioning force on the first flap 3 or the first side baffle 4. To improve the timeliness of the movement of the first flap assembly, in this embodiment, the tensioning member 9 is directly connected to the first flap 3, so that the tensioning force of the tensioning member acts directly on the first flap 3. During the process of the flip mechanism changing from the closed state to the half-open state, the tensioning member 9 always keeps the first flip plate 3 taut. This tensioning force is greater than the driving force of the drive component 2, so the first flip plate 3 remains stationary, while only the second flip plate 5 flips outward. During the process of the flip mechanism changing from the half-open state to the fully open state, when the force transmitted from the drive component 2 to the first flip plate 3 through the limiting structure is greater than the tensioning force of the tensioning member 9 on the first flip plate 3, the first flip plate 3 will flip outward along with the second flip plate 5 until it is fully open. When the flip mechanism closes from the fully open state, the tensioning member 9 provides a restoring force to the first flip plate assembly, which can increase the speed at which the first flip plate assembly flips inward, accelerate the closing process of the flip mechanism, and also keep the first flip plate assembly taut in the closed state, ensuring that there is no gap between the first flip plate assembly and the housing 1, improving the appearance and preventing dust and fumes from entering the interior of the housing 1.

[0056] Specifically, the tensioning element 9 can be, but is not limited to, a tension spring, an electromagnet, or a micro switch. In this embodiment, the tensioning element 9 is selected as an electromagnet.

[0057] The drive assembly 2 in this embodiment includes a bracket and a drive unit. The bracket is mounted on the inner wall of the housing 1, and the drive unit is rotatably connected to the bracket. The drive unit can be a push rod motor, a linear output cylinder, or a linear output motor, etc. The preferred embodiment is a push rod motor, which has low noise, low energy consumption, and high thrust during use. It should be noted that all mechanisms capable of linear drive are within the protection scope of this application.

[0058] The working process of the range hood in this embodiment is described below.

[0059] First, the drive assembly 2 drives the second flap 5 to flip outward and open to a certain angle to a half-open state via the second side baffle 6. At this time, the first limiting block 7 and the second limiting block 8 abut against each other. Figure 2 As shown; the drive assembly 2 continues to extend, at which point the electromagnet disengages, and the second side baffle 6, through the limiting structure, drives the first side baffle 4 and the first flap 3 to flip outwards. Simultaneously, the second flap 5 continues to flip outwards until it is fully open, as shown. Figure 3 As shown.

[0060] When the range hood is turned off, the drive assembly 2 drives the second flap 5 to flip inward, while the first flap 3 flips inward under the action of the electromagnet; the two move synchronously. The first flap 3 first returns to the half-open state, such as... Figure 2 As shown; the second flap 5 continues to flip inward under the action of the drive component 2 until it is closed, as shown. Figure 1 As shown.

[0061] The half-open state corresponds to situations with low oil fume concentration. In this state, the negative pressure area outside the smoke inlet is smaller, resulting in slightly weaker smoke extraction. This corresponds to the low setting of the range hood, making it suitable for cooking with minimal oil fumes. The fully open state corresponds to situations with high oil fume concentration. In this state, the negative pressure area outside the smoke inlet is largest, resulting in the best smoke extraction. This corresponds to the high setting of the range hood, making it suitable for cooking with heavy oil fumes.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. For those skilled in the art, based on the concept of this utility model, there will be changes in the specific implementation methods and application scope. The content of this specification should not be construed as a limitation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A range hood, characterized in that, include: The housing (1) has a smoke inlet on it; A flap mechanism is used to close or open the smoke inlet. The flap mechanism includes a first flap assembly and a second flap assembly. The first flap assembly is rotatably connected to the housing (1), and the second flap assembly is rotatably connected to the lower end of the first flap assembly. as well as, A drive component (2) is provided, the output of which is connected to the second flap component. The second flap assembly flips outward before the first flap assembly, and the first flap assembly remains stationary while the second flap assembly flips, so that the flap mechanism has a half-open state where only the second flap assembly is open; the second flap assembly can drive the first flap assembly to flip outward together, so that the flap mechanism has a fully open state where both the first and second flap assemblies are open, and in the fully open state, the opening angle of the second flap assembly is greater than the opening angle of the first flap assembly.

2. The range hood as described in claim 1, characterized in that, A limiting structure is provided between the second flip-plate assembly and the first flip-plate assembly, and the second flip-plate assembly drives the first flip-plate assembly to flip together through the limiting structure.

3. The range hood as described in claim 2, characterized in that, The first flap assembly includes a first flap (3) and a first side baffle (4) fixedly connected to the first flap (3). The second flap assembly includes a second flap (5) and a second side baffle (6) fixedly connected to the second flap (5). The first flap (3) is rotatably connected to the housing (1), and the second flap (5) is rotatably connected to the lower end of the first flap (3). The output end of the drive assembly (2) is connected to the second side baffle (6), and a limiting structure is provided between the second side baffle (6) and the first side baffle (4).

4. The range hood as described in claim 3, characterized in that, The limiting structure includes a first limiting block (7) disposed on one of the first side baffle (4) and the second side baffle (6), and a second limiting block (8) disposed on the other of the first side baffle (4) and the second side baffle (6). During the outward opening stroke of the second flap (5), the first limiting block (7) can abut against the second limiting block (8) to drive the first flap (3) to move outward.

5. The range hood as described in claim 4, characterized in that, The first limiting block (7) is provided with a first limiting inclined surface, and the second limiting block (8) is provided with a second limiting inclined surface. The first limiting inclined surface can abut against the second limiting inclined surface.

6. The range hood as described in claim 4, characterized in that, The first side baffle (4) has a first limiting block (7) protruding on the side facing the second side baffle (6), and the second side baffle (6) has a second limiting block (8) protruding at the end away from the second flip plate (5) towards the rotation center of the second flip plate (5).

7. The range hood according to any one of claims 3-6, characterized in that, The first side baffle (4) has a fan-shaped structure, and the rotation center of the first side baffle (4) coincides with the rotation center of the first flap (3); and / or, The second side baffle (6) has a fan-shaped ring structure, and the rotation center of the second side baffle (6) coincides with the rotation center of the second flap (5).

8. The range hood according to any one of claims 3-6, characterized in that, The flip-plate mechanism also includes a tensioning member (9), one end of which is connected to the housing (1), and the other end is connected to the first flip-plate (3) or the first side baffle (4); During the process of the flip mechanism changing from the closed state to the half-open state, the tensioning member (9) can keep the first flip plate (3) stationary; during the process of the flip mechanism changing from the half-open state to the fully open state, the force of the driving component (2) is greater than the tensioning force of the tensioning member (9), so that the second flip plate (5) drives the first flip plate (3) to flip outward.

9. The range hood as described in claim 8, characterized in that, The tensioning element (9) is a tension spring or an electromagnet.

10. The range hood as described in claim 1, characterized in that, The first flap assembly is connected to the housing (1) via a first hinge (10); and / or, The second flap assembly is connected to the first flap assembly via a second hinge (11).

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