A range hood

Abstract

The present application relates to the technical field of kitchen appliances, and discloses a range hood, which comprises a shell, a flap mechanism and a flexible driving mechanism, the flap mechanism is used for opening or closing an air inlet on the shell, the flap mechanism comprises a first flap assembly and a second flap assembly which are in transmission connection, the second flap assembly is connected with the shell, and the first flap assembly is connected at the lower end of the second flap assembly; the flexible driving mechanism comprises a driving assembly, a force storage assembly and a flexible control rope, one end of the force storage assembly is connected with the second flap assembly, the other end is connected with the first flap assembly, one end of the flexible control rope is connected with the output end of the driving assembly, and the other end is connected with the force storage assembly; when the flexible control rope is tightened, the first flap assembly and the second flap assembly can be turned over and opened in sequence, so that the flap mechanism has a half-open state and a fully-open state. The range hood has the advantages of small space occupation, compact structure, convenient and rapid maintenance and cleaning, reduced noise and vibration during operation, and improved user experience.

Description

Technical Field

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

[0002] Range hoods are widely used appliances in kitchens to remove cooking fumes. They are categorized into side-draft and direct-draft types based on their fume extraction method. In existing side-draft range hoods, the flip-up glass is typically driven by a single-sided push-rod motor. While this method is simple and low-cost, it also presents several significant technical challenges. First, the push-rod motor and the four-bar linkage mechanism occupy considerable space, making the range hood design less compact, affecting its overall aesthetics and installation flexibility. Furthermore, the complex structure makes maintenance and cleaning cumbersome, increasing costs and time, should any moving parts malfunction. Additionally, a single-sided push-rod motor driving the flip-up glass results in unstable movement, and the direct-push method can generate significant noise and vibration during operation, negatively impacting the user experience.

[0003] Therefore, there is an urgent need for a range hood to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a range hood that is compact in structure, easy to maintain, and has low operating noise and vibration.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A range hood, comprising:

[0007] The casing has a smoke inlet.

[0008] A flap mechanism for opening or closing the smoke inlet, the flap mechanism comprising a first flap assembly and a second flap assembly connected by a transmission connection, the second flap assembly being connected to the housing, and the first flap assembly being connected to the lower end of the second flap assembly; and,

[0009] A flexible drive mechanism includes a drive component, a power storage component, and a flexible control rope. One end of the power storage component is connected to the second flap component, and the other end is connected to the first flap component. One end of the flexible control rope is connected to the output end of the drive component, and the other end is connected to the power storage component. When the flexible control rope is tightened, it can drive the first flap component and the second flap component to flip open sequentially, so that the flap mechanism has a half-open state where only the first flap component is open and a fully open state where both the first flap component and the second flap component are open.

[0010] As a preferred technical solution for the above-mentioned range hood, the drive assembly includes a motor and a tensioning wheel, the tensioning wheel is connected to the output shaft of the motor, and the flexible control rope is connected to the tensioning wheel.

[0011] The flexible drive mechanism also includes a reversing component, which is connected to the housing, and the flexible control rope passes through the reversing component and is connected to the power storage component.

[0012] As a preferred technical solution for the above-mentioned range hood, the reversing component includes a first pulley and a second pulley. The first pulley is disposed between the drive component and the second pulley. The central axis of the first pulley is set at an angle to the central axis of the second pulley. The extending direction of the central axis of the second pulley is parallel to the extending direction of the rotation center of the power storage component. The flexible control rope passes through the first pulley and the second pulley in sequence and is connected to the power storage component.

[0013] As a preferred embodiment of the above-mentioned range hood, the second pulley is at least partially located outside the second flap assembly, so that the flexible control rope between the second pulley and the power storage assembly is located outside the second flap assembly.

[0014] As a preferred technical solution for the above-mentioned range hood, the flexible control rope between the second pulley and the power storage component is set at an angle to the plane where the second flap component is located.

[0015] As a preferred technical solution for the above-mentioned range hood, the second pulley includes an integrally formed second pulley body and a fixed angle hinge. The second flip-plate assembly is rotatably connected to the housing through the fixed angle hinge. The second pulley body is disposed on the outside of the fixed angle hinge. The flexible control rope is wound around the second pulley body. The fixed angle hinge will stop rotating after rotating to a set angle to limit the flip angle of the second flip-plate assembly.

[0016] As a preferred technical solution for the aforementioned range hood, the power storage component includes a power storage spring and an eccentric wheel. One end of the power storage spring is connected to the second flap assembly, and the other end is connected to the eccentric wheel. The rotation centers of the power storage spring and the eccentric wheel are coaxially arranged. The eccentric wheel is connected to the first flap assembly, and the flexible control rope is connected to the eccentric wheel. When the flexible control rope is tightened, it can drive the eccentric wheel to rotate, thereby causing the first flap assembly and the second flap assembly to flip open sequentially.

[0017] As a preferred technical solution for the above-mentioned range hood, the range hood further includes an elastic tensioning member, one end of which is connected to the housing and the other end of which is connected to the second flap assembly;

[0018] During the process of the flipping mechanism changing from the closed state to the half-open state, the elastic tensioning member can keep the second flipping assembly 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 elastic tensioning member, so that the flexible control rope drives the second flipping assembly to flip outward through the power storage component.

[0019] As a preferred technical solution for the above-mentioned range hood, a flexible drive mechanism is provided on each of the left and right sides of the flip-plate mechanism, and the two flexible drive mechanisms share a drive assembly. The flexible drive mechanism also includes a tension wheel. A tension wheel, a power storage assembly, and a flexible control rope are provided on each side of the drive assembly. The tension wheel is disposed between the drive assembly and the power storage assembly. The two flexible control ropes pass through the top and bottom of the two tension wheels respectively and press against the surface of the tension wheel.

[0020] The beneficial effects of this invention are:

[0021] The range hood of the present invention includes a housing, a flap mechanism, and a flexible drive mechanism. The housing is provided with a smoke inlet. The flap mechanism is used to open or close the smoke inlet. The flap mechanism includes a first flap assembly and a second flap assembly that are connected by transmission. The second flap assembly is connected to the housing, and the first flap assembly is connected to the lower end of the second flap assembly. The flexible drive mechanism includes a drive assembly, a power storage assembly, and a flexible control rope. One end of the power storage assembly is connected to the second flap assembly, and the other end is connected to the first flap assembly. One end of the flexible control rope is connected to the output end of the drive assembly, and the other end is connected to the power storage assembly. When the flexible control rope is tightened, it can drive the first flap assembly and the second flap assembly to flip open in sequence, so that the flap mechanism has a half-open state where only the first flap assembly is open and a fully open state where both the first flap assembly and the second flap assembly are open. This range hood uses a flexible drive mechanism instead of the traditional single-sided push rod motor direct drive method, which realizes the smooth flipping of the flap mechanism. Its structure is compact, occupies little space, and has a simple drive method, which is convenient for quick maintenance and cleaning. In addition, it effectively reduces noise and vibration during operation, improving the user experience. Attached Figure Description

[0022] Figure 1 This is a cross-sectional structural diagram of a range hood in the closed state according to a specific embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the back of the range hood after the casing has been removed, according to a specific embodiment of the present invention.

[0024] Figure 3This is a structural schematic diagram of a range hood component provided in a specific embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the working state of the eccentric wheel of the range hood in the closed state, provided in a specific embodiment of the present invention;

[0026] Figure 5 This is a cross-sectional structural diagram of a range hood in a semi-open state according to a specific embodiment of the present invention;

[0027] Figure 6 This is a top cross-sectional view of the range hood in a half-open state according to a specific embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the range hood in a half-open state according to a specific embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the working state of the eccentric wheel of the range hood in a half-open state, provided in a specific embodiment of the present invention;

[0030] Figure 9 This is a cross-sectional structural diagram of a range hood in its fully open state, provided in a specific embodiment of the present invention;

[0031] Figure 10 This is a top cross-sectional view of the range hood in its fully open state according to a specific embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the range hood in its fully open state according to a specific embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram of the working state of the eccentric wheel of the range hood in the fully open state, provided in a specific embodiment of the present invention;

[0034] Figure 13 This is a structural schematic diagram of the eccentric wheel and bushing provided in a specific embodiment of the present invention;

[0035] Figure 14 This is a schematic diagram of the assembly relationship of some structures of the energy storage component provided in a specific embodiment of the present invention;

[0036] Figure 15 This is a cross-sectional view of a portion of the energy storage component provided in a specific embodiment of the present invention.

[0037] In the picture:

[0038] 1. Shell;

[0039] 2. First flap assembly;

[0040] 3. Second flap assembly;

[0041] 4. Drive assembly; 41. Motor; 42. Tensioning wheel;

[0042] 51. First pulley; 52. Second pulley;

[0043] 61. Power-saving spring; 62. Eccentric wheel; 63. Connecting rod; 64. Decorative central shaft; 65. Rotating shaft; 66. Bushing; 621. Groove; 622. Reinforcing rib;

[0044] 7. Flexible control rope;

[0045] 8. Tensioner;

[0046] 9. Elastic tensioning element;

[0047] 10. Side panels. Detailed Implementation

[0048] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention 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 thorough understanding of the present invention. However, the present invention can be practiced 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 the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0049] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0050] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 invention according to the specific circumstances.

[0052] In this invention, 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," "over," and "on top" of 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.

[0053] 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.

[0054] like Figures 1 to 15As shown, this embodiment provides a range hood that is compact, easy to maintain, runs smoothly, and is highly efficient. The range hood includes a housing 1, a flap mechanism, and a flexible drive mechanism. The housing 1 has a smoke inlet. The flap mechanism is used to open or close the smoke inlet and includes a first flap assembly 2 and a second flap assembly 3 connected by a transmission connection. The second flap assembly 3 is connected to the housing 1, and the first flap assembly 2 is connected to the lower end of the second flap assembly 3. The flexible drive mechanism includes a drive assembly 4, a power storage assembly, and a flexible control rope 7. The drive assembly 4 is disposed inside the housing 1. One end of the power storage assembly is connected to the second flap assembly 3, and the other end is connected to the first flap assembly 2. One end of the flexible control rope 7 is connected to the output end of the drive assembly 4, and the other end is connected to the power storage assembly. When the flexible control rope 7 is tightened, it can drive the first flap assembly 2 and the second flap assembly 3 to flip open sequentially. The flipping sequence is unique, so that the flap mechanism has a half-open state where only the first flap assembly 2 is open, and a fully open state where both the first flap assembly 2 and the second flap assembly 3 are open. In this embodiment, the smoke inlet faces forward (in this embodiment, the descriptions of front, back, left, right, up, down, etc., are all relative to the user when the range hood is in use).

[0055] Compared to the technical problems existing in the flip-plate mechanism drive of side-suction range hoods in the prior art, this range hood adopts a flexible drive mechanism to replace the traditional single-side push rod motor direct drive method, realizing the smooth flipping of the flip-plate mechanism. Its structure is compact, occupies little space, and the simplified drive method simplifies the structure, making it easy to maintain and clean quickly. In addition, it effectively reduces noise and vibration during operation, improving the user experience.

[0056] In this embodiment, the first flap assembly 2 includes a first flap assembly body and a first decorative panel, with the first decorative panel covering the outer surface of the first flap assembly body. The first flap assembly body can be made of sheet metal with good strength, thereby ensuring the overall structural strength of the first flap assembly 2. The first decorative panel can be made of glass, which is not only aesthetically pleasing but also easy to clean. Optionally, the first flap assembly body and the first decorative panel can be fixed together by adhesive bonding.

[0057] Similarly, the second flap assembly 3 includes a second flap assembly body and a second decorative panel, with the second decorative panel covering the outer surface of the second flap assembly body. The second flap assembly body can be made of sheet metal with good strength, thereby ensuring the overall structural strength of the second flap assembly 3. The second decorative panel can be made of glass, which is not only aesthetically pleasing but also easy to clean. Optionally, the second flap assembly body and the second decorative panel can be fixed together by adhesive bonding.

[0058] like Figure 2 and Figure 3As shown, a flexible drive mechanism is provided on each of the left and right sides of the flip mechanism. The two flexible drive mechanisms share a drive assembly 4. The flexible drive mechanism also includes a tension wheel 8, which cooperates with the flexible control rope 7. The tension wheel 8 is used to maintain a constant tension in the flexible control rope 7, thereby ensuring the stable and reliable operation of the flip mechanism. Specifically, the drive assembly 4 is located approximately at the center of the housing 1. A tension wheel 8, a power storage assembly, and a flexible control rope 7 are provided on each side of the drive assembly 4. The tension wheel 8 is located between the drive assembly 4 and the power storage assembly. The two flexible control ropes 7 pass through the top and bottom of the two tension wheels 8 respectively and press against the surface of the tension wheels 8. That is, one flexible control rope 7 passes through the top of the tension wheel 8 on the same side, and the other flexible control rope 7 passes through the bottom of the tension wheel 8 on the same side. By rationally arranging the tensioning wheel 8, the constant tension of the flexible control rope 7 is ensured, thereby ensuring that the flexible control rope 7 can be tightened or loosened evenly under the drive of the drive component 4, avoiding system instability caused by inconsistent tension, and thus ensuring the stable and reliable operation of the flipping mechanism.

[0059] The drive assembly 4 includes a motor 41 and a tensioning wheel 42. The tensioning wheel 42 is connected to the output shaft of the motor 41, and the flexible control rope 7 is connected to the tensioning wheel 42. When the motor 41 starts, the tensioning wheel 42 rotates, thereby tightening or loosening the flexible control rope 7. The motor 41 transmits power through the two flexible control ropes 7. When the motor 41 starts to exert force, the flexible control ropes 7 contract according to the rotation direction of the motor 41, thereby pulling the flap mechanism open. The tensioning wheels 8 on both sides of the motor 41 ensure synchronous drive of the flexible control ropes 7 on both sides, realizing precise control of the flap mechanism, thereby ensuring the stable opening and closing of the flap mechanism and improving system stability.

[0060] The flexible drive mechanism in this embodiment also includes a reversing component, which is connected to the housing 1. The reversing component is used to guide the direction of the flexible control rope 7. The flexible control rope 7 passes through the pulley assembly and is then connected to the power storage component.

[0061] The reversing assembly includes a first pulley 51 and a second pulley 52. ​​The first pulley 51 is positioned between the drive assembly 4 and the second pulley 52. ​​The central axis of the first pulley 51 forms an angle with the central axis of the second pulley 52. ​​The extension direction of the central axis of the second pulley 52 is parallel to the extension direction of the rotation center of the power storage assembly. The first pulley 51 is used to change the travel direction of the flexible control rope 7, and the second pulley 52 is used to pull the load. The flexible control rope 7 passes through the first pulley 51 and the second pulley 52 in sequence and then winds around the power storage assembly. Since the flexible control rope 7 extends horizontally inside the housing 1, while the force applied to the flap mechanism is vertical, the first pulley 51 acts as a reversing wheel to change the travel direction of the flexible control rope 7 in order to achieve the force driving effect of the flexible control rope 7 on the flap mechanism. After passing through the first pulley 51 and turning, the flexible control rope 7 passes through the second pulley 52 and is directly connected to the power storage assembly. The force transmission of the flexible control rope 7 is achieved simply and effectively through the two pulleys. The structure is simple, easy to implement, and easy to maintain. In this embodiment, the fulcrum of the flexible control rope 7 is located at the top of the housing 1. Therefore, the second pulley 52 is located at the top of the housing 1, and the drive assembly 4 is located below the top of the housing 1. Therefore, the first pulley 51 is not horizontally arranged, but is inclined upward at a certain angle, so that the flexible control rope 7 extends upward at an angle after passing through the first pulley 51.

[0062] Some existing range hoods employ flexible drive structures, but their flexible control rope 7, as a sliding drive component, needs to cooperate with a rotating drive component. This not only increases the complexity of the structure but may also lead to a reduction in drive efficiency. In this embodiment, as... Figure 7 As shown, the second pulley 52 is at least partially located outside the second flap assembly 3, so that the flexible control rope 7 between the second pulley 52 and the power storage assembly is located outside the second flap assembly 3, that is, the flexible control rope 7 is located outside the second flap assembly 3 after passing through the second pulley 52. ​​This structural arrangement makes the path of the flexible control rope 7 direct and efficient, thereby effectively improving the driving efficiency of the drive assembly 4.

[0063] Optionally, the flexible control rope 7 between the second pulley 52 and the power storage assembly is set at an angle to the plane of the second flap assembly 3. After passing through the second pulley 52, the flexible control rope 7 is not set parallel to the second flap assembly 3, which can prevent jamming.

[0064] To solve the problem of a fixed flipping angle in the flipping mechanism, such as Figure 1 , Figure 5 and Figure 9As shown, the second pulley 52 includes an integrally formed second pulley body and a fixed-angle hinge. The second flip-plate assembly 3 is rotatably connected to the housing 1 via the fixed-angle hinge. The second pulley body is located on the outside of the fixed-angle hinge, and the flexible control rope 7 is wound around the second pulley body. The fixed-angle hinge stops rotating after rotating to a set angle, thereby limiting the flip angle of the second flip-plate assembly 3. The second flip-plate assembly 3 is equipped with a fixed-angle hinge, and stops rotating after reaching the set angle, thus ensuring that the second flip-plate assembly 3 can accurately stop at the predetermined position. It should be noted that the fixed-angle hinge is a structure already existing in the prior art, and its specific structure will not be described in detail here. Making the second pulley body and the fixed-angle hinge into an integral molded structure not only reduces the number of parts and improves the structural compactness, but also improves the consistency and controllability of the flip-plate mechanism's movement.

[0065] In this embodiment, the opening and closing of the first flap assembly 2 both rely on two power-accumulating components on the left and right. Each power-accumulating component includes a power-accumulating spring 61 and an eccentric wheel 62. One end of the power-accumulating spring 61 is connected to the second flap assembly 3, and the other end is connected to the eccentric wheel 62. The rotation centers of the power-accumulating spring 61 and the eccentric wheel 62 are coaxially arranged. The eccentric wheel 62 is connected to the first flap assembly 2, and a flexible control rope 7 is connected to the eccentric wheel 62. The flexible control rope 7 is deflected by the first pulley 51, then passes through the second pulley 52, and is directly connected to the eccentric wheel 62. When the motor 41 starts to rotate, the flexible control rope 7 retracts according to the rotation direction of the motor 41, thereby pulling the first flap assembly 2 open.

[0066] The core feature of the eccentric wheel 62 lies in the eccentric design of its axle, which causes the rotation radius of the eccentric wheel 62 to change with the angle. The profile of the eccentric wheel 62 is a spline curve, and the curvature of the spline curve changes with the rotation of the eccentric wheel 62, thus causing the rotation radius of the eccentric wheel 62 to change with the rotation angle.

[0067] Specifically, when the flap mechanism is in the closed state, such as Figure 4 As shown, the distance between the rotation center of the eccentric wheel 62 and the tangent point of the flexible control rope 7 is x1. In the half-open state, as... Figure 8 As shown, the distance between the rotation center of the eccentric wheel 62 and the tangent point of the flexible control rope 7 is x2. In the fully open state, as... Figure 12 As shown, the distance between the rotation center of the eccentric wheel 62 and the point of tangency of the flexible control rope 7 is x3, where x3 > x2 > x1. It should be noted that the distance between the rotation center of the eccentric wheel 62 and the point of tangency of the flexible control rope 7 is the rotation radius of the eccentric wheel 62.

[0068] When the flap mechanism is closed, the spline curve of the eccentric wheel 62 results in a relatively small wheel diameter, which can be considered the minimum rotation radius of the eccentric wheel 62. As the eccentric wheel 62 rotates, its rotation radius gradually increases. This design provides a labor-saving advantage when opening the flap mechanism and makes it easier to overcome dead points when winding up the flexible control rope 7. When the eccentric wheel 62 starts to rotate, the increase in its rotation radius means that the tension point of the flexible control rope 7 is farther from the axis. According to the lever principle, this reduces the force required to open the flap mechanism, thereby improving the mechanical efficiency of the system. As the eccentric wheel 62 continues to rotate, the increase in wheel diameter not only helps to save labor but also enables control of the opening and closing speed, achieving more precise control. It also helps to reduce vibration of the flap mechanism during opening, resulting in smoother and more accurate control.

[0069] To achieve the structure in which the flexible control rope 7 between the second pulley 52 and the power storage assembly forms an angle with the plane of the second flap assembly 3, in this embodiment, in the closed state, the radius of the second pulley 52 is slightly larger than the distance x1 between the rotation center of the eccentric wheel 62 and the tangent point of the flexible control rope 7, i.e., the rotation radius of the eccentric wheel 62. This wheel assembly design, with the larger upper part and the smaller lower part, ensures that the flexible control rope 7 between the second pulley 52 and the eccentric wheel 62 has a certain angle with the second flap assembly 3, preventing the flexible control rope 7 from passing through the second pulley 52 and becoming parallel to the second flap assembly 3, thereby preventing jamming.

[0070] Optionally, such as Figure 13 As shown, a groove 621 is provided on the outer circumferential surface of the eccentric wheel 62. The groove 621 is used to accommodate the flexible control rope 7 and has a guiding and limiting function for the flexible control rope 7. The flexible control rope 7 is accommodated in the groove 621, which can prevent the flexible control rope 7 from deviating from or even detaching from the surface of the eccentric wheel 62 when tightening or loosening, thereby ensuring the stability and reliability of the driving force of the flexible control rope 7 on the eccentric wheel.

[0071] In a feasible implementation plan, such as Figure 14 and Figure 15 As shown, the power storage assembly also includes a rotating shaft 65, which is inserted through and fixed to the rotation center of the eccentric wheel 62 and rotatably connected to the second flap assembly 3. The inner ring of the power storage spring 61 is fixedly connected to the rotating shaft 65. Under the tension of the flexible control rope 7, the eccentric wheel 62 and the power storage spring 61 rotate relative to the second flap assembly 3 via the rotating shaft 65, thereby causing the first flap assembly 2 to flip.

[0072] In another feasible implementation scheme, such as Figure 14 and Figure 15As shown, the energy storage assembly also includes a rotating shaft 65 and a bushing 66. The rotating shaft 65 rotatably passes through the inner hole of the bushing 66 and is fixedly connected to the second flap assembly 3. The bushing 66 passes through and is fixed to the rotation center of the eccentric wheel 62. The inner ring of the energy storage spring 61 is fixedly connected to the bushing 66. In this structure, the rotating shaft 65 remains stationary. Under the tension of the flexible control rope 7, the eccentric wheel 62 and the energy storage spring 61 rotate relative to the rotating shaft 65 and the second flap assembly 3 via the bushing 66, thereby causing the first flap assembly 2 to flip. The bushing 66 can protect the rotating shaft 65, effectively preventing wear and friction of the rotating shaft 65, reducing energy loss, and ensuring stability and efficiency; moreover, the bushing 66 is easy to replace after wear, reducing maintenance costs.

[0073] Optionally, the bushing 66 and the eccentric wheel 62 can be integrally formed, which is convenient for processing and has high structural stability. The bushing 66 and the eccentric wheel 62 can also be fixedly connected, such as by welding, interference fit, or by pin, etc., which will not be listed in this embodiment.

[0074] like Figure 13 As shown, when the bushing 66 and the eccentric wheel 62 are integrally formed, a reinforcing rib 622 can also be provided on the eccentric wheel 62. One end of the reinforcing rib 622 is decorated with the bushing 66, and the other end is connected to the eccentric wheel 62. Providing a reinforcing rib 622 can improve the overall structural strength of the eccentric wheel 62, while ensuring the connection stability between the eccentric wheel 62 and the bushing 66, thereby improving the reliability of the rotation of the eccentric wheel 62 and extending its service life.

[0075] like Figure 1 , Figure 4 , Figure 8 , Figure 12 and Figure 13 As shown, the power storage component in this embodiment also includes a connecting rod 63. One end of the connecting rod 63 is connected to the eccentric wheel 62, and the other end is connected to the first flap assembly 2. By setting the connecting rod 63, the eccentric wheel 62 can drive the first flap assembly 2 to rotate. The connecting rod 63 can be, but is not limited to, an L-shape or an inverted C-shape, as long as it can convert the rotation of the eccentric wheel 62 into the rotation of the first flap assembly 2.

[0076] Optionally, the connecting rod 63 and the eccentric wheel 62 are integrally formed, which simplifies the structure and facilitates assembly and processing.

[0077] In this embodiment, as Figure 2 , Figure 6 and Figure 10 As shown, the range hood also includes a decorative central shaft 64 disposed on the outside of the flip mechanism. The decorative central shaft 64 is disposed between the first flip assembly 2 and the second flip assembly 3, and is used to cover the gap between the first flip assembly 2 and the second flip assembly 3, so as to ensure that the internal structure of the first flip assembly 2 and the second flip assembly 3 will not be exposed when they rotate, thereby improving the appearance.

[0078] like Figure 1 , Figure 5 and Figure 9 As shown, the range hood in this embodiment also includes an elastic tensioning member 9, one end of which is connected to the housing 1, and the other end is connected to the second flap assembly 3. During the process of the flap mechanism changing from a closed state to a half-open state, the elastic tensioning member 9 keeps the second flap assembly 3 stationary. During the process of the flap mechanism changing from a half-open state to a fully open state, the force of the driving component 4 is greater than the tensioning force of the elastic tensioning member 9, so that the flexible control rope 7 drives the second flap assembly 3 to flip outward through the power storage component. When the flap mechanism closes from a fully open state, the tensioning member 9 provides a restoring force to the second flap assembly 3, which increases the speed at which the second flap assembly 3 flips inward, accelerates the closing process of the flap mechanism, and also tightens the second flap assembly 3 in the closed state, ensuring no gap between the second flap assembly 3 and the housing 1, improving the aesthetic appearance, and preventing dust and fumes from entering the interior of the housing 1.

[0079] Optionally, the range hood also includes a side plate 10. One end of the side plate 10 is fixedly connected to the second flap assembly 3, and the other end is connected to an elastic tensioning member 9. The elastic tensioning member 9 pulls the second flap assembly 3 through the side plate 10. In this embodiment, there are two side plates 10 and two elastic tensioning members 9, respectively located on the left and right sides of the second flap assembly 3. When the motor 41 performs work, the flexible control ropes 7 on both sides simultaneously tighten or loosen, thereby achieving synchronous driving of the two side plates 10. The two side plates 10 drive the second flap assembly 3 to move.

[0080] The above structure makes the opening and closing of the second flap assembly 3 more stable, and at the same time avoids unevenness on the left and right sides of the second flap assembly 3 after it is closed, resulting in gaps between it and the housing 1, thus improving the appearance of the range hood. When the flap mechanism is closed, the second flap assembly 3 is kept in the closed state by two elastic tensioning members 9 connected to the side plate 10. When the elastic force of the elastic tensioning members 9 is overcome by the force applied by the motor 41 through the flexible control rope 7, the second flap assembly 3 begins to flip outward.

[0081] In this embodiment, the elastic tensioning element 9 can be, but is not limited to, a tension spring. In other embodiments, it can also be an electromagnetic lock or a micro switch.

[0082] The following is a brief explanation of the opening process of the flap mechanism of this range hood.

[0083] Motor 41 starts and transmits power through two flexible control ropes 7. When the flexible control ropes 7 contract, the eccentric wheel 62 rotates, driving the connecting rod 63 to rotate. When the contraction force of the flexible control ropes 7 exceeds the preset force of the accumulator spring 61, the first flap assembly 2 opens. As the first flap assembly 2 opens, the accumulator spring 61 gradually tightens until it reaches its contraction limit. At this point, the first flap assembly 2 stops rotating, and the flap mechanism is in a half-open state. Figures 5 to 7 As shown; the flexible control rope 7 continues to contract, transmitting power to the second flap assembly 3. The second flap assembly 3 is kept closed by two elastic tensioning members 9 connected to the side plate 10. When the elastic force of the tensioning members 9 is overcome by the force applied by the motor 41 through the flexible control rope 7, the second flap assembly 3 begins to open. The second flap assembly 3 is equipped with a fixed-angle hinge. The second flap assembly 3 stops rotating after reaching a set angle, ensuring that the second flap assembly 3 can accurately stop at the predetermined position. At this time, the flap mechanism is in its fully open state, as shown... Figures 9 to 11 As shown. When the second flap assembly 3 rotates to its position, the motor 41 receives a signal to stop rotating and locks its current position to maintain the stability of the flap mechanism.

[0084] In this embodiment, the range hood uses a motor 41 in conjunction with a flexible control rope 7 and a reversing assembly, replacing the traditional push rod motor direct drive method, thus achieving smooth flipping of the flap mechanism. The compact design of the flexible control rope 7 and reversing assembly effectively reduces the size of the mechanism, solving the problem of large space occupation. At the same time, the simplified drive method simplifies the structure, facilitates quick maintenance and cleaning, improves flap stability, and reduces noise and vibration during operation. Furthermore, the reasonable arrangement of the tensioning wheels 8 ensures constant tension of the flexible control rope 7, avoiding system instability caused by inconsistent tension. This range hood also includes a fixed-angle hinge and a power-saving spring 61 with a retraction limit design, ensuring accurate stopping of the flap mechanism at the required position, thereby optimizing the user experience.

[0085] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

[0086] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A range hood, characterized in that, include: The housing (1) has a smoke inlet on it; A flap mechanism for opening or closing the smoke inlet, the flap mechanism comprising a first flap assembly (2) and a second flap assembly (3) connected by a transmission connection, the second flap assembly (3) being connected to the housing (1), and the first flap assembly (2) being connected to the lower end of the second flap assembly (3); and, The flexible drive mechanism includes a drive component (4), a power storage component, and a flexible control rope (7). One end of the power storage component is connected to the second flap component (3), and the other end is connected to the first flap component (2). One end of the flexible control rope (7) is connected to the output end of the drive component (4), and the other end is connected to the power storage component. When the flexible control rope (7) is tightened, it can drive the first flap component (2) and the second flap component (3) to flip open one after the other, so that the flap mechanism has a half-open state where only the first flap component (2) is open and a fully open state where both the first flap component (2) and the second flap component (3) are open.

2. The range hood as described in claim 1, characterized in that, The drive assembly (4) includes a motor (41) and a tensioning wheel (42), the tensioning wheel (42) being connected to the output shaft of the motor (41), and the flexible control rope (7) being connected to the tensioning wheel (42).

3. The range hood as described in claim 1, characterized in that, The flexible drive mechanism also includes a reversing component, which is connected to the housing (1), and the flexible control rope (7) passes through the reversing component and is connected to the power storage component.

4. The range hood as described in claim 3, characterized in that, The reversing assembly includes a first pulley (51) and a second pulley (52). The first pulley (51) is disposed between the drive assembly (4) and the second pulley (52). The central axis of the first pulley (51) is set at an angle to the central axis of the second pulley (52). The extension direction of the central axis of the second pulley (52) is parallel to the extension direction of the rotation center of the energy storage assembly. The flexible control rope (7) passes through the first pulley (51) and the second pulley (52) in sequence and is then connected to the energy storage assembly.

5. The range hood as described in claim 4, characterized in that, The second pulley (52) is at least partially located outside the second flap assembly (3) such that the flexible control rope (7) between the second pulley (52) and the power storage assembly is located outside the second flap assembly (3).

6. The range hood as described in claim 5, characterized in that, The flexible control rope (7) between the second pulley (52) and the power storage assembly is set at an angle to the plane of the second flap assembly (3).

7. The range hood as described in claim 4, characterized in that, The second pulley (52) includes an integrally formed second pulley body and a fixed angle hinge. The second flip plate assembly (3) is rotatably connected to the housing (1) through the fixed angle hinge. The second pulley body is disposed on the outside of the fixed angle hinge. The flexible control rope (7) is wound around the second pulley body. The fixed angle hinge will stop rotating after rotating to a set angle to limit the flip angle of the second flip plate assembly (3).

8. The range hood as described in claim 1, characterized in that, The power storage component includes a power storage spring (61) and an eccentric wheel (62). One end of the power storage spring (61) is connected to the second flap assembly (3), and the other end is connected to the eccentric wheel (62). The rotation centers of the power storage spring (61) and the eccentric wheel (62) are coaxially arranged. The eccentric wheel (62) is connected to the first flap assembly (2). The flexible control rope (7) is connected to the eccentric wheel (62). When the flexible control rope (7) is tightened, it can drive the eccentric wheel (62) to rotate, thereby driving the first flap assembly (2) and the second flap assembly (3) to flip open one after the other.

9. The range hood as described in claim 1, characterized in that, The range hood also includes an elastic tensioning member (9), one end of which is connected to the housing (1) and the other end is connected to the second flap assembly (3); During the process of the flipping mechanism changing from the closed state to the half-open state, the elastic tension member (9) can keep the second flipping assembly (3) 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 (4) is greater than the tension of the elastic tension member (9), so that the flexible control rope (7) drives the second flipping assembly (3) to flip outward through the power storage component.

10. The range hood according to any one of claims 1-9, characterized in that, The flip-plate mechanism is provided with a flexible drive mechanism on each of its left and right sides. The two flexible drive mechanisms share a drive assembly (4). The flexible drive mechanism also includes a tension wheel (8). The drive assembly (4) is provided with a tension wheel (8), a power storage assembly and a flexible control rope (7) on each side. The tension wheel (8) is located between the drive assembly (4) and the power storage assembly. The two flexible control ropes (7) pass through the top and bottom of the two tension wheels (8) and press against the surface of the tension wheel (8).

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