A range hood

Abstract

The application relates to the technical field of kitchen appliances, and discloses a range hood. The range hood comprises a shell, a flap mechanism and a flexible driving mechanism. The flap mechanism comprises a first flap assembly and a second flap assembly. The flexible driving mechanism is arranged in the interior of the shell. The flexible driving mechanism comprises a driving assembly, a transmission assembly, a force storage assembly and a flexible control rope. One end of the force storage assembly is connected with the first flap assembly, and the other end is connected with the second flap assembly. One end of the transmission assembly is connected with the shell, and the other end is connected with the second 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 to the force storage assembly after passing through the transmission assembly. When the flexible control rope is tightened, the transmission assembly and the force storage assembly can be driven to rotate simultaneously, so that the first flap assembly and the second flap assembly are simultaneously turned and opened. The flexible driving mechanism is hidden in the interior of the shell, has compact structure, occupies small space, has high space utilization and high appearance neatness and aesthetic property, and has low cleaning difficulty.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a range hood. BACKGROUND

[0002] The range hood is an electrical appliance widely used in the kitchen, which is used to exhaust the oil fume generated in the cooking process. The range hood is divided into side suction type and straight suction type according to the oil fume suction mode. In the existing side suction type range hood, the driving of the flap glass usually adopts the mode of directly pushing by single side push rod motor. Although this mode is simple to realize and low in cost, it also has some significant technical problems. First, the push rod motor and the hinge four-bar linkage mechanism occupy a large space, so that the design of the range hood is not compact enough, which affects the overall aesthetic appearance and the flexibility of installation, and the structure is complex. Once these moving parts have problems, the maintenance and cleaning work is very tedious, which increases the maintenance cost and time. In addition, the single side push rod motor drives the flap glass to move, and the flap movement is unstable. The direct pushing mode of the flap glass may produce a large noise and vibration during operation, which affects the user experience.

[0003] There are also solutions in the prior art that use flexible driving mechanisms to solve the above problems, but the flexible control ropes, pulleys and other components of the flexible driving mechanism are located outside the flap glass, which is easy to accumulate oil and dust, is not convenient to clean, affects the appearance aesthetic appearance, and the thick and heavy oil stains also affect the stability and reliability and working efficiency of the entire flexible driving mechanism, thereby affecting the user experience.

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

[0005] The purpose of the present application is to provide a range hood which is compact in structure, good in appearance aesthetic appearance and convenient to clean and maintain.

[0006] To achieve this purpose, the present application adopts the following technical solutions:

[0007] A range hood, comprising:

[0008] A shell, which is provided with an air inlet;

[0009] A flap mechanism for opening or closing the air inlet, the flap mechanism comprising a first flap assembly and a second flap assembly connected in transmission, the second flap assembly being connected with the shell, and the first flap assembly being connected at the lower end of the second flap assembly; and

[0010] A flexible driving mechanism is arranged inside the shell, and comprises a driving assembly, a transmission assembly, a force storage assembly and a flexible control rope.

[0011] As a preferred technical scheme of the above range hood, the transmission assembly comprises a turning mechanism connected to the shell, and the flexible control rope changes its running direction after passing through the turning mechanism to be connected to the force storage assembly.

[0012] As a preferred technical scheme of the above range hood, the turning mechanism comprises a turning pulley, the extension direction of the central axis of the turning pulley is parallel to the extension direction of the rotation center of the force storage assembly, and the flexible control rope is connected to the force storage assembly after being wound around the turning pulley.

[0013] As a preferred technical scheme of the above range hood, the turning pulley comprises coaxially arranged first and second pulleys, the diameter of the first pulley is larger than that of the second pulley, and the groove on the first pulley is in communication with the groove on the second pulley, and the flexible control rope is connected to the force storage assembly after being wound around the first and second pulleys in sequence.

[0014] As a preferred technical scheme of the above range hood, the first and second pulleys are integrally formed.

[0015] As a preferred technical scheme of the above range hood, the transmission assembly further comprises a linkage mechanism, one end of the linkage mechanism is connected to the turning mechanism, and the other end is connected to the second flap assembly, the linkage mechanism can move following the rotation of the turning mechanism to drive the second flap assembly to turn over.

[0016] As a preferred technical scheme of the above range hood, the linkage mechanism comprises a turning connecting rod, one end of the turning connecting rod is connected to the turning mechanism, and the other end is connected to the second flap assembly, and the flexible control rope can drive the turning mechanism to rotate when it is tightened, thereby driving the turning connecting rod and the second flap assembly to rotate.

[0017] As the preferred technical scheme of the above-mentioned range hood, the turning connecting rod comprises a first connecting rod and a second connecting rod connected at an angle, the first connecting rod is fixedly connected with the turning mechanism, and the second connecting rod extends towards the second flap assembly and is connected with the second flap assembly.

[0018] As the preferred technical scheme of the above-mentioned range hood, the linkage mechanism further comprises an elastic tensioning member and a side plate, one end of the elastic tensioning member is connected with the housing, the other end is connected with the side plate, the side plate is arranged in parallel with the turning connecting rod, the side plate is fixedly connected with the second flap assembly, and the side plate is further connected with the second connecting rod.

[0019] As the preferred technical scheme of the above-mentioned range hood, the linkage mechanism further comprises a synchronous shaft, one end of the synchronous shaft is connected with the second connecting rod, and the other end is connected with the side plate.

[0020] As the preferred technical scheme of the above-mentioned range hood, the power storage assembly comprises a power storage spring and an eccentric wheel, one end of the power storage spring is connected with the second flap assembly, the other end is connected with the eccentric wheel, the rotation centers of the power storage spring and the eccentric wheel are coaxially arranged, the eccentric wheel is connected with the first flap assembly, the flexible control rope is connected with the eccentric wheel, and the flexible control rope can drive the eccentric wheel to rotate when being tightened, thereby driving the first flap assembly to be turned and opened.

[0021] As the preferred technical scheme of the above-mentioned range hood, the range hood further comprises a decorative middle shaft arranged outside the flap mechanism, the decorative middle shaft is arranged between the first flap assembly and the second flap assembly, and is used for shielding the gap between the first flap assembly and the second flap assembly, the decorative middle shaft comprises a middle shaft body, a first decorative strip and a second decorative strip, the middle shaft body is fixedly connected with the second flap assembly, the second decorative strip is fixedly connected with the first flap assembly, and the first decorative strip is movably arranged between the middle shaft body and the second decorative strip, the upper portion of the first decorative strip overlaps the lower portion of the middle shaft body, and the lower portion of the first decorative strip overlaps the upper portion of the second decorative strip.

[0022] As the preferred technical scheme of the above-mentioned range hood, the upper portion of the first decorative strip is covered outside the lower portion of the middle shaft body, and the upper portion of the second decorative strip is covered outside the lower portion of the first decorative strip; or, the lower portion of the first decorative strip is covered outside the upper portion of the second decorative strip, and the lower portion of the first decorative strip is covered outside the upper portion of the second decorative strip.

[0023] And / or, the first decorative strip is a metal strip, a magnet is embedded in the middle shaft body, and the first decorative strip and the magnet are magnetically connected.

[0024] And / or, the assembly surface between the central axis body and the first decorative strip, the assembly surface between the first decorative strip and the second decorative strip are circular arcs.

[0025] The present application has the following advantages:

[0026] The oil fume extractor of the present application comprises a shell, a flap mechanism and a flexible driving mechanism, the shell is provided with an air inlet; the flap mechanism is used for opening or closing the air inlet, the flap mechanism comprises a first flap assembly and a second flap assembly connected in transmission, 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 is arranged inside the shell, the flexible driving mechanism comprises a driving assembly, a transmission assembly, a force storage assembly and a flexible control rope, one end of the force storage assembly is connected with the first flap assembly, the other end is connected with the second flap assembly, one end of the transmission assembly is connected with the shell, the other end is connected with the second flap assembly, one end of the flexible control rope is connected to the output end of the driving assembly, the other end is connected to the force storage assembly after passing through the transmission assembly, and the flexible control rope can drive the transmission assembly and the force storage assembly to rotate simultaneously when the flexible control rope is tightened, so as to drive the first flap assembly and the second flap assembly to flip and open simultaneously. The oil fume extractor adopts the flexible driving mechanism, instead of the traditional single-side push rod motor direct pushing mode, realizes the stable flipping of the flap mechanism, has compact structure, occupies small space, and has simple driving mode; the flexible driving mechanism of the oil fume extractor is hidden inside the shell, realizes the neat and beautiful appearance and the effective use of space, simplifies the maintenance process, reduces the cleaning difficulty, and further improves the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a cross-sectional structure schematic diagram of the oil fume extractor in the open state provided by the embodiment of the present application;

[0028] Figure 2 is a structure schematic diagram of the oil fume extractor after removing the back of the shell provided by the embodiment of the present application Figure 1 ;

[0029] Figure 3 is a structure schematic diagram of the oil fume extractor after removing the back of the shell provided by the embodiment of the present application Figure 2 ;

[0030] Figure 4 is a structure schematic diagram of the oil fume extractor after removing the back of the shell provided by the embodiment of the present application

[0031] Figure 5 is Figure 3 a local enlarged view of A in FIG. 7;

[0032] Figure 6 is Figure 3 a local enlarged view of B in FIG. 7;

[0033] Figure 7 is a structural schematic diagram of an eccentric wheel and a shaft sleeve provided by the embodiment of the present application;

[0034] Figure 8 is an assembly relationship schematic diagram of partial structures of a force storage assembly provided by the embodiment of the present application;

[0035] Figure 9 is a sectional view of partial structures of the force storage assembly provided by the embodiment of the present application;

[0036] Figure 10 is a structural schematic diagram of the extractor hood in an open state provided by the embodiment of the present application;

[0037] Figure 11 is a sectional structural schematic diagram of partial structures of the extractor hood provided by the embodiment of the present application.

[0038] In the drawings:

[0039] 1, a housing;

[0040] 2, a first flap assembly;

[0041] 3, a second flap assembly;

[0042] 4, a driving assembly; 41, a motor; 42, a take-up wheel;

[0043] 51, a turning pulley; 52, a turning connecting rod; 53, a pulley support; 54, a synchronous shaft; 511, a first pulley; 512, a second pulley; 521, a first connecting rod; 522, a second connecting rod;

[0044] 61, a force storage spring; 62, an eccentric wheel; 63, a connecting rod;

[0045] 7, a flexible control rope;

[0046] 8, a tensioning wheel;

[0047] 9, an elastic tensioning member;

[0048] 10, a side plate;

[0049] 11, a decorative central shaft; 111, a central shaft body; 112, a first decorative strip; 113, a second decorative strip; 114, a magnet;

[0050] 12, a fixed-angle hinge. DETAILED DESCRIPTION

[0051] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described below in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in many different manners without the specific details, and it is to be understood that the present application is not limited to the specific embodiments described below and that the specific embodiments are given for the purposes of exemplification only.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0053] In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0054] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0056] 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.

[0057] like Figures 1 to 8 As shown, this embodiment provides a range hood with a compact structure, aesthetically pleasing appearance, and easy cleaning and maintenance. 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 is disposed inside the housing 1 and includes a drive assembly 4, a transmission assembly, a power storage assembly, and a flexible control rope 7. One end of the power storage assembly is connected to the first flap assembly 2, and the other end is connected to the second flap assembly 3. One end of the transmission assembly is connected to the housing 1, and the other end is connected to the second flap assembly 3. One end of the flexible control rope 7 is connected to the output end of the drive assembly 4, and the other end passes through the transmission assembly and connects to the power storage assembly. When the flexible control rope 7 is tightened, it can drive the transmission assembly and the power storage assembly to rotate simultaneously, thereby causing the first flap assembly 2 and the second flap assembly 3 to flip open simultaneously. 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).

[0058] 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. The flexible drive mechanism of the range hood is hidden inside the shell 1, which realizes the neat and beautiful appearance and the effective use of space. It also simplifies the maintenance process, reduces the difficulty of cleaning, and further improves the user experience.

[0059] like Figures 1 to 6 As shown, the transmission assembly includes a steering mechanism connected to the housing 1. The flexible control rope 7 changes direction after passing through the steering mechanism to connect to the power storage assembly. By setting the steering mechanism inside the housing 1, the flexible control rope 7 can change its direction of travel inside the housing 1 and connect to the power storage assembly. Compared with the prior art where the flexible control rope 7 is located outside the flap mechanism, this design is more aesthetically pleasing.

[0060] Optionally, the turning mechanism comprises a turning pulley 51, a central axis of the turning pulley 51 extends in parallel with an extension direction of a rotation center of the force storage assembly, and the flexible control rope 7 is connected to the force storage assembly after being wound around the turning pulley 51. The turning pulley has a small volume and is convenient to arrange in the limited space inside the shell 1. Since the central axis of the turning pulley 51 extends in parallel with the extension direction of the rotation center of the force storage assembly, the running direction of the flexible control rope 7 changes after being wound around the turning pulley 51, and the driving of the force storage assembly can be realized by directly winding the flexible control rope 7 on the force storage assembly, so that the structure is simple and the mechanical efficiency is high.

[0061] As shown in Figure 5 and Figure 6 , the turning pulley 51 comprises a first pulley 511 and a second pulley 512 coaxially arranged, the diameter of the first pulley 511 is greater than that of the second pulley 512, and the grooves on the first pulley 511 and the grooves on the second pulley 512 are in communication, and the flexible control rope 7 is connected to the force storage assembly after being wound around the first pulley 511 and the second pulley 512 in sequence. The structure design of the above-mentioned turning pulley 51 enables the flexible control rope 7 to efficiently transmit power in a compact space, thereby driving the opening of the flap mechanism, which not only optimizes the space occupation, but also improves the overall aesthetics. The turning pulley 51 is fixed to the inner side of the shell 1 by the pulley bracket 53, which ensures its stability and reliability.

[0062] The first pulley 511 and the second pulley 512 are integrally formed, which can reduce the number of parts, reduce the assembly difficulty, and improve the structural stability of the turning pulley 51, thereby improving the transmission stability and transmission accuracy. Specifically, the first pulley 511 and the second pulley 512 can be integrally cast, which has a simple machining process and low cost.

[0063] Continuing to refer to Figure 5 and Figure 6 , the transmission assembly further comprises a linkage mechanism, one end of the linkage mechanism is connected to the turning mechanism, and the other end of the linkage mechanism is connected to the second flap assembly 3. The linkage mechanism can move following the rotation of the turning mechanism, thereby driving the second flap assembly 3 to flip. By providing the linkage mechanism, the driving force of the flexible control rope 7 on the turning mechanism can be transmitted to the second flap assembly 3, thereby realizing the flipping motion of the second flap assembly 3.

[0064] Specifically, the linkage mechanism comprises a steering connecting rod 52, one end of the steering connecting rod 52 is connected to the steering mechanism, and the other end is connected to the second flap assembly 3. When the flexible control rope 7 is tightened, the steering mechanism can be driven to rotate, thereby driving the steering connecting rod 52 and the second flap assembly 3 to rotate. The steering connecting rod 52 serves as a bridge between the steering mechanism and the second flap assembly 3, so that the driving force of the flexible control rope 7 applied to the steering mechanism is transmitted to the second flap assembly 3, thereby realizing the overturning movement of the second flap assembly 3. The steering connecting rod 52 has a simple structure, and at the same time, the power of the flexible control rope 7 is more efficiently transmitted in a compact space.

[0065] The steering connecting rod 52 in the embodiment comprises a first connecting rod 521 and a second connecting rod 522 connected at an angle, the first connecting rod 521 is fixedly connected with the steering pulley 51, and the second connecting rod 522 extends towards the second flap assembly 3 and is connected with the second flap assembly 3 so as to drive the second flap assembly 3 to move. Specifically, the first connecting rod 521 is fixed with the steering pulley 51 through a fixed shaft, forming a transmission relationship between the steering pulley 51 and the steering connecting rod 52, so that when the steering pulley 51 rotates, the steering connecting rod 52 can be driven to rotate synchronously, thereby driving the second flap assembly 3 to overturn. The specific fixing structure can be that the first connecting rod 521 is provided with a connecting hole, the connecting hole is aligned with the center through hole of the steering pulley 51, and the fixed shaft passes through the connecting hole and the center through hole of the steering pulley 51 to fix the two. In the embodiment, the first connecting rod 521 is fixed on one side of the second pulley 512.

[0066] The first connecting rod 521 and the second connecting rod 522 are integrally formed, which can reduce the number of parts, reduce the assembly difficulty, and improve the structural stability of the steering connecting rod 52, thereby improving the transmission stability and transmission accuracy. Specifically, the steering connecting rod 52 is in the shape of L or C as a whole.

[0067] Reference Figures 1 to 4 As shown, the transmission assembly in the embodiment further comprises an elastic tensioning member 9 and a side plate 10, one end of the elastic tensioning member 9 is connected to the housing 1, the other end is connected to the side plate 10, the side plate 10 is arranged in parallel with the steering connecting rod 52, the side plate 10 is fixedly connected with the second flap assembly 3, and the side plate 10 is further connected with the second connecting rod 522. The elastic tensioning member 9 pulls the second flap assembly 3 through the side plate 10. In the embodiment, two side plates 10 are provided, and two elastic tensioning members 9 are also provided, which are respectively arranged on the left and right sides of the second flap assembly 3. The two side plates 10 simultaneously drive the second flap assembly 3 to overturn.

[0068] The structure makes the opening and closing of the second flap assembly 3 more stable, with less vibration and noise during movement, and avoids the gap between the second flap assembly 3 and the shell 1 after the second flap assembly 3 is closed, improving the appearance of the range hood, and preventing dust and oil fumes from entering the shell 1. When the flap mechanism is closed, the second flap assembly 3 is kept in the closed state by the two elastic tensioning members 9 connected to the side plate 10. When the elastic force of the elastic tensioning member 9 is overcome by the force applied by the flexible control rope 7, the second flap assembly 3 begins to turn outward. When the flap mechanism is closed from the fully open state, the tensioning member 9 provides a restoring force to the second flap assembly 3, which can improve the speed of the second flap assembly 3 turning inward, speed up the closing process of the flap mechanism, and also tighten the second flap assembly 3 in the closed state, ensuring that there is no gap between the second flap assembly 3 and the shell 1.

[0069] The elastic tensioning member 9 in the present embodiment can be, but is not limited to, a tension spring, and in other embodiments can also be an electromagnetic lock or a micro switch.

[0070] As shown in Figures 3 to 6 The transmission assembly further includes a synchronization shaft 54, one end of which is connected to the second connecting rod 522, and the other end is connected to the side plate 10. The side plate 10 is arranged parallel to the steering connecting rod 52, and the two are connected by the synchronization shaft 54 to realize synchronous movement of the two. When the steering connecting rod 52 rotates, it drives the side plate 10 to rotate through the synchronization shaft 54, thereby driving the second flap assembly 3 to turn. To improve transmission efficiency, the synchronization shaft 54 is arranged horizontally, with both ends connected perpendicularly to the side plate 10 and the second connecting rod 522, and the synchronization shaft 54 is arranged at the lower part of the side plate 10.

[0071] In the present embodiment, the first flap assembly 2 includes a first flap assembly body and a first decorative plate, and the first decorative plate covers 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 plate can be made of glass, which is not only beautiful but also easy to clean. Alternatively, the first flap assembly body and the first decorative plate can be fixed by adhesion.

[0072] Similarly, the second flap assembly 3 includes a second flap assembly body and a second decorative plate, and the second decorative plate covers 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 plate can be made of glass, which is not only beautiful but also easy to clean. Alternatively, the second flap assembly body and the second decorative plate can be fixed by adhesion.

[0073] As shown in Figure 4As shown, 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 will contract according to the rotation direction of the motor 41, thereby pulling the flap mechanism open.

[0074] 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. When the flexible control rope 7 is tightened, it can drive the eccentric wheel 62 to rotate, thereby causing the first flap assembly 2 to flip open. The flexible control rope 7 is directly connected to the eccentric wheel 62 after passing through a steering pulley. When the drive component 4 drives the flexible control rope 7 to tighten, the steering pulley 51 around which the flexible control rope 7 is wound and the eccentric wheel 62 below it will rotate simultaneously, thereby causing the first flap assembly 2 and the second flap assembly 3 to flip open simultaneously.

[0075] like Figure 7 As shown, 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.

[0076] Specifically, as the eccentric wheel 62 rotates, it has three states: a first state, a second state, and a third state. In the first state, the rotation radius of the eccentric wheel 62 is r1; in the second state, it is r2; and in the third state, it is r3, where r3 > r2 > r1. Thus, as the eccentric wheel 62 rotates, its rotation radius gradually increases. According to the lever principle, an increase in the lever arm reduces the force; therefore, the eccentric wheel 62 has the advantage of saving effort. In this embodiment, the first state corresponds to the closed state of the flap mechanism; the second state corresponds to the half-open state where the first flap assembly 2 and the second flap assembly 3 are simultaneously opened; and the third state corresponds to the fully open state where the first flap assembly 2 has stopped rotating relative to the second flap assembly 3, but the second flap assembly 3 continues to rotate relative to the housing 1 to its maximum angle. It should be noted that the distance between the rotation center of the eccentric wheel 62 and the tangent point of the flexible control rope 7 is the rotation radius of the eccentric wheel 62.

[0077] In the closed state of the flap mechanism, the cam curve of the eccentric wheel 62 makes the wheel diameter relatively small, which can be considered as the minimum rotating radius of the eccentric wheel 62. As the eccentric wheel 62 rotates, the rotating radius of the eccentric wheel 62 gradually increases. This design has the advantage of saving labor when opening the flap mechanism, and it is easier to overcome the dead point when winding the flexible control rope 7. When the eccentric wheel 62 starts to rotate, the increase in its diameter means that the pulling point of the flexible control rope 7 is further away from the shaft center, which makes the force required to open the flap mechanism smaller according to the principle of leverage, thereby improving the mechanical efficiency of the system.

[0078] Further, as the eccentric wheel 62 continues to rotate, the increase in the wheel diameter not only helps to save labor, but also enables control of the opening and closing speed, thereby achieving more precise control, while helping to reduce vibration of the flap mechanism during opening, achieving more stable and precise control.

[0079] Optionally, as shown in Figure 7 , a groove 621 is provided on the outer periphery of the eccentric wheel 62, which is used to accommodate the flexible control rope 7 and has a guiding and limiting effect on 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 it is being tightened or loosened, thereby ensuring the stable reliability of the driving force of the flexible control rope 7 on the eccentric wheel.

[0080] In a feasible embodiment, as shown in Figure 8 and Figure 9 , the force storage assembly further includes a rotating shaft 65, which is arranged through and fixed to the rotation center of the eccentric wheel 62 and is rotationally connected with the second flap assembly 3, and the inner ring of the force storage spring 61 is fixedly connected with the rotating shaft 65. Under the pulling force of the flexible control rope 7, the eccentric wheel 62 and the force storage spring 61 rotate relative to the second flap assembly 3 through the rotating shaft 65, thereby driving the first flap assembly 2 to flip.

[0081] In another feasible embodiment, as shown in Figure 8 and Figure 9 , the force storage assembly further includes a rotating shaft 65 and a shaft sleeve 66, the rotating shaft 65 is rotationally arranged through the inner hole of the shaft sleeve 66 and is fixedly connected with the second flap assembly 3, and the shaft sleeve 66 is arranged through and fixed to the rotation center of the eccentric wheel 62, and the inner ring of the force storage spring 61 is fixedly connected with the shaft sleeve 66. Under the pulling force of the flexible control rope 7, the eccentric wheel 62 and the force storage spring 61 rotate relative to the rotating shaft 65 and the second flap assembly 3 through the shaft sleeve 66, thereby driving the first flap assembly 2 to flip. The shaft sleeve 66 can protect the rotating shaft 65, effectively avoiding wear and friction of the rotating shaft 65, reducing energy loss, and ensuring stability and efficiency; and the shaft sleeve 66 can be easily replaced after wear, reducing maintenance costs.

[0082] Optionally, the shaft sleeve 66 and the eccentric wheel 62 can be integrally formed, which is convenient to process and has high structural stability. The shaft sleeve 66 and the eccentric wheel 62 can also be fixedly connected, for example, welded, interference fit, or connected through a pin shaft, and the like, which will not be enumerated one by one in the embodiment.

[0083] As shown in Figure 7 , when the shaft sleeve 66 and the eccentric wheel 62 are integrally formed, the reinforcing rib 622 can also be arranged on the eccentric wheel 62, one end of the reinforcing rib 622 is arranged in the shaft sleeve 66, and the other end is connected to the eccentric wheel 62. The reinforcing rib 622 can improve the overall structural strength of the eccentric wheel 62 and ensure the connection stability of the eccentric wheel 62 and the shaft sleeve 66, thereby improving the reliability of the rotation of the eccentric wheel 62 and prolonging the service life.

[0084] As shown in Figure 6 and Figure 7 , the force storage assembly in the embodiment further 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 arranging 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, L-shaped or inverted C-shaped, as long as it can convert the rotation of the eccentric wheel 62 into the rotation of the first flap assembly 2.

[0085] Optionally, the connecting rod 63 and the eccentric wheel 62 are integrally formed, which simplifies the structure and is convenient for assembly and processing.

[0086] Continuing to refer to Figures 1 to 4 , the left and right sides of the flap mechanism are respectively provided with a flexible driving mechanism, and the two flexible driving mechanisms share one driving assembly 4. The flexible driving mechanism further includes a tension pulley 8, the tension pulley 8 cooperates with the flexible control rope 7, and the tension pulley 8 is used to maintain the constant tension of the flexible control rope 7, thereby ensuring the stable reliability of the operation of the flap mechanism. Specifically, the driving assembly 4 is located at the center position inside the housing 1, and one tension pulley 8, one transmission assembly, one force storage assembly, and one flexible control rope 7 are arranged on both sides of the driving assembly 4. The tension pulley 8 is arranged between the driving assembly 4 and the transmission assembly, the transmission assembly is located directly below the same side tension pulley 8, and the flexible control rope 7 passes through above the tension pulley 8 and is connected to the transmission assembly below, specifically, the flexible control rope 7 is connected to the turning pulley 51. As shown in Figure 5 and Figure 6As shown, on the deflection pulley 51, the flexible control rope 7 first winds around the first pulley 511 for half a turn, then winds around the second pulley 512 for half a turn and continues to travel and is connected to the force storage assembly. This winding method allows the flexible control rope 7 to change the direction of travel and effectively drive the deflection pulley 51 to rotate when it is tightened. In this embodiment, the tensioning pulley 8 not only maintains the constant tension of the flexible control rope 7, but also functions as a reversing pulley, changing the direction of travel of the flexible control rope 7. Through the clever layout of the tensioning pulley 8 and the deflection pulley 51, the tension of the flexible control rope 7 can be transmitted in a limited closed space, and the structure is simple, easy to realize and maintain. The tensioning pulleys 8 on both sides of the motor 41 ensure the synchronous driving of the flexible control ropes 7 on both sides, thereby ensuring that the flexible control ropes 7 can be uniformly tightened or loosened under the driving of the driving assembly 4, avoiding the problem of system instability caused by inconsistent tension, realizing accurate control of the flap mechanism, and ensuring the stable opening and closing of the flap mechanism, thereby improving the stability of the system.

[0087] In order to solve the problem of fixed turning angle of the flap mechanism, the second flap assembly 3 is rotatably connected to the housing 1 through the fixed-angle hinge 12. The second flap assembly 3 is equipped with the fixed-angle hinge 12, and the turning angle will stop rotating after reaching the set angle, thereby ensuring that the second flap assembly 3 can be accurately stopped at the predetermined position. It should be noted that the fixed-angle hinge 12 is a structure that already exists in the prior art, and its specific structure will not be described here.

[0088] As shown in FIG. 6, the first flap assembly 2 is rotatably connected to the housing 1 through the fixed-angle hinge 11. The first flap assembly 2 is equipped with the fixed-angle hinge 11, and the turning angle will stop rotating after reaching the set angle, thereby ensuring that the first flap assembly 2 can be accurately stopped at the predetermined position. It should be noted that the fixed-angle hinge 11 is a structure that already exists in the prior art, and its specific structure will not be described here. Figure 10 and Figure 11As shown, the range hood further comprises a decorative middle shaft 11 arranged outside the flap mechanism, the decorative middle shaft 11 is arranged between the first flap assembly 2 and the second flap assembly 3, and is used to shield the gap between the first flap assembly 2 and the second flap assembly 3, so as to ensure that the first flap assembly 2 and the second flap assembly 3 will not expose the internal structure when rotating. The decorative middle shaft 11 comprises a middle shaft body 111, a first decorative strip 112 and a second decorative strip 113, the middle shaft body 111 is fixedly connected with the second flap assembly 3, the second decorative strip 113 is fixedly connected with the first flap assembly 2, and the first decorative strip 112 is movably arranged between the middle shaft body 111 and the second decorative strip 113. The upper part of the first decorative strip 112 overlaps the lower part of the middle shaft body 111, and the lower part of the first decorative strip 112 overlaps the upper part of the second decorative strip 113. Under this structure, when the flap mechanism rotates, the design allowance between the middle shaft body 111, the first decorative strip 112 and the second decorative strip 113 ensures that the upper part of the first decorative strip 112 always partially overlaps the lower part of the middle shaft body 111, and the lower part of the first decorative strip 112 always partially overlaps the upper part of the second decorative strip 113, so as to ensure that no gap is exposed, thereby keeping the appearance neat and beautiful. In this embodiment, the middle shaft body 111 is directly pasted on the lower edge of the second flap assembly 3, and the second decorative strip 113 is directly pasted on the upper edge of the first flap assembly 2.

[0089] In order to realize the overlapping structure, the upper part of the first decorative strip 112 and the lower part of the middle shaft body 111, and the lower part of the first decorative strip 112 and the upper part of the second decorative strip 113 respectively cover each other. Specifically, the upper part of the first decorative strip 112 can cover the outside of the lower part of the middle shaft body 111, and the upper part of the second decorative strip 113 can cover the outside of the lower part of the first decorative strip 112; or the lower part of the middle shaft body 111 can cover the outside of the upper part of the first decorative strip 112, and the lower part of the first decorative strip 112 can cover the outside of the upper part of the second decorative strip 113.

[0090] As to the connection mode among the central axis body 111, the first decorative strip 112 and the second decorative strip 113, the first decorative strip 112 in the embodiment is a metal strip, the central axis body 111 is embedded with a magnet 114, and the first decorative strip 112 and the magnet 114 are magnetically connected. That is, there is no connection structure among the central axis body 111, the first decorative strip 112 and the second decorative strip 113, but the first decorative strip 112 is magnetically adsorbed with the magnet 114 in the central axis body 111, and in combination with the covering structure described above, the first decorative strip 112 can flexibly rotate between the central axis body 111 and the second decorative strip 113 and can always overlap with the central axis body 111 and the second decorative strip 113, so as to ensure that the gap between the first flap assembly 2 and the second flap assembly 3 is not exposed and the internal structure is not exposed. The materials of the central axis body 111 and the second decorative strip 113 can be metal or non-metal materials, which are not limited in the embodiment.

[0091] The assembly surface between the central axis body 111 and the first decorative strip 112 and the assembly surface between the first decorative strip 112 and the second decorative strip 113 are both circular arcs.

[0092] The length of the central axis body 111 is the same as the length of the first flap assembly 2, that is, the two ends of the central axis body 111 are flush with the two ends of the flap mechanism. The central axis body 111 is internally provided with a receiving groove for supporting and fixing the power storage spring 61 and the eccentric wheel 62.

[0093] The opening process of the flap mechanism of the oil extractor will be briefly described below.

[0094] The motor 41 is started, and the motor 41 transmits power through the two flexible control ropes 7. When the flexible control ropes 7 are contracted, the steering pulley and the eccentric wheel 62 are simultaneously rotated, driving the first flap assembly 2 and the second flap assembly 3 to be simultaneously opened. With the opening of the first flap assembly 2, the power storage spring 61 is gradually tightened until it reaches its contraction limit, at which time the first flap assembly 2 stops rotating; the flexible control rope 7 continues to tighten, driving the second flap assembly 3 to continue to turn outward, and the second flap assembly 3 is provided with a fixed-angle hinge 12, and the second flap assembly 3 will stop rotating after reaching the set angle, ensuring that the second flap assembly 3 can be accurately stopped at the predetermined position. When the second flap assembly 3 is rotated to the position, the motor 41 receives a signal to stop rotating and lock the current position to maintain the stability of the flap mechanism. The flexible driving mechanism not only enables the first flap assembly 2 and the second flap assembly 3 to be simultaneously opened, but also enables the first flap assembly 2 to stop rotating before the second flap assembly 3.

[0095] The range hood in the embodiment adopts the motor 41 cooperating with the flexible control rope 7 and the transmission assembly, instead of the traditional direct pushing mode of the push rod motor, to realize the stable overturning of the flap mechanism. All the components of the flexible driving mechanism in the range hood are hidden in the inside of the shell 1, to realize the neat appearance and the effective use of space, and the hidden structure layout also simplifies the maintenance process, reduces the cleaning difficulty, and further improves the user experience. The layout of the transmission assembly enables the tension to be transmitted in the limited closed space through the ingenious winding of the flexible control rope 7, so as to drive the opening of the flap mechanism. At the same time, the simplified driving mode simplifies the structure, facilitates the rapid maintenance and cleaning, improves the flap stability, and reduces the noise and vibration in the running process. In addition, the motor 41 drives the flexible control ropes 7 on both sides synchronously, to realize the accurate control of the flap mechanism and ensure the stable opening and closing of the flap mechanism.

[0096] Obviously, the above only describes the preferred embodiments of the present application and the applied technical principles. It is understood by those skilled in the art that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the appended claims.

[0097] Note that in the description of the present specification, the description referring to the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. The illustrative expressions of the above terms in the present specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

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, A flexible drive mechanism is disposed inside the housing (1). The flexible drive mechanism includes a drive component (4), a transmission component, a power storage component, and a flexible control rope (7). One end of the power storage component is connected to the first flap component (2), and the other end is connected to the second flap component (3). One end of the transmission component is connected to the housing (1), and the other end is connected to the second flap component (3). One end of the flexible control rope (7) is connected to the output end of the drive component (4), and the other end passes through the transmission component and is connected to the power storage component. When the flexible control rope (7) is tightened, it can drive the transmission component and the power storage component to rotate simultaneously, thereby driving the first flap component (2) and the second flap component (3) to flip open simultaneously.

2. The range hood as described in claim 1, characterized in that, The transmission assembly includes a steering mechanism connected to the housing (1). The flexible control rope (7) changes direction after passing through the steering mechanism to connect to the power storage assembly.

3. The range hood as described in claim 2, characterized in that, The steering mechanism includes a steering pulley (51), the extension direction of the central axis of the steering pulley (51) is parallel to the extension direction of the rotation center of the power storage component, and the flexible control rope (7) is wound around the steering pulley (51) and then connected to the power storage component.

4. The range hood as described in claim 3, characterized in that, The steering pulley (51) includes a first pulley (511) and a second pulley (512) arranged coaxially. The diameter of the first pulley (511) is larger than the diameter of the second pulley (512), and the groove on the first pulley (511) is connected to the groove on the second pulley (512). The flexible control rope (7) is wound around the first pulley (511) and the second pulley (512) in sequence and then connected to the power storage component.

5. The range hood as described in claim 4, characterized in that, The first pulley (511) and the second pulley (512) are integrally formed.

6. The range hood as described in claim 2, characterized in that, The transmission assembly also includes a linkage mechanism. One end of the linkage mechanism is connected to the steering mechanism, and the other end is connected to the second flap assembly (3). The linkage mechanism can move in accordance with the rotation of the steering mechanism, thereby driving the second flap assembly (3) to flip.

7. The range hood as described in claim 6, characterized in that, The linkage mechanism includes a steering linkage (52), one end of which is connected to the steering mechanism and the other end is connected to the second flap assembly (3). When the flexible control rope (7) is tightened, it can drive the steering mechanism to rotate, thereby driving the steering linkage (52) and the second flap assembly (3) to rotate.

8. The range hood as described in claim 7, characterized in that, The steering link (52) includes a first link (521) and a second link (522) connected at an angle. The first link (521) is fixedly connected to the steering mechanism, and the second link (522) extends toward the second flap assembly (3) and is connected to the second flap assembly (3).

9. The range hood as described in claim 8, characterized in that, The linkage mechanism also includes an elastic tensioning member (9) and a side plate (10). One end of the elastic tensioning member (9) is connected to the housing (1), and the other end is connected to the side plate (10). The side plate (10) is arranged parallel to the steering linkage (52). The side plate (10) is fixedly connected to the second flap assembly (3), and the side plate (10) is also connected to the second linkage (522).

10. The range hood as described in claim 9, characterized in that, The linkage mechanism also includes a synchronous shaft (54), one end of which is connected to the second connecting rod (522), and the other end is connected to the side plate (10).

11. The range hood according to any one of claims 1-10, 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) to flip open.

12. The range hood according to any one of claims 1-10, characterized in that, The range hood also includes a decorative central shaft (11) disposed on the outside of the flip mechanism. The decorative central shaft (11) is disposed between the first flip assembly (2) and the second flip assembly (3) to cover the gap between the first flip assembly (2) and the second flip assembly (3). The decorative central shaft (11) includes a central shaft body (111), a first decorative strip (112) and a second decorative strip (113). The central shaft body (111) is fixedly connected to the second flip assembly (3), and the second decorative strip (113) is fixedly connected to the first flip assembly (2). The first decorative strip (112) is movably disposed between the central shaft body (111) and the second decorative strip (113). The upper part of the first decorative strip (112) overlaps with the lower part of the central shaft body (111), and the lower part of the first decorative strip (112) overlaps with the upper part of the second decorative strip (113).

13. The range hood as described in claim 12, characterized in that, The upper part of the first decorative strip (112) covers the outer side of the lower part of the central axis body (111), and the upper part of the second decorative strip (113) covers the outer side of the lower part of the first decorative strip (112). Alternatively, the lower part of the central axis body (111) covers the outer side of the upper part of the first decorative strip (112), and the lower part of the first decorative strip (112) covers the outer side of the upper part of the second decorative strip (113). And / or, the first decorative strip (112) is a metal strip, and a magnet (114) is embedded in the central axis body (111), and the first decorative strip (112) and the magnet (114) are magnetically connected; And / or, the mounting surface between the central axis body (111) and the first decorative strip (112), and the mounting surface between the first decorative strip (112) and the second decorative strip (113) are both arc-shaped.

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