Connecting rod linkage mechanism, smoke collecting cavity assembly and lifting type range hood

Abstract

The application relates to a connecting rod linkage mechanism, a smoke collecting cavity assembly and a lifting type range hood. The connecting rod linkage mechanism comprises a multi-connecting rod assembly, a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod and the third connecting rod are respectively used for being hingedly connected to the front and rear parts of a fixed box body, the two ends of the second connecting rod are respectively hingedly connected to the first connecting rod and the third connecting rod, a first-stage transmission connecting rod is hingedly connected to the third connecting rod and used for connecting a first-stage lifting part, a second-stage transmission connecting rod is hingedly connected to the third connecting rod and used for connecting a second-stage lifting part, the hinged point of the first-stage transmission connecting rod on the third connecting rod is located between the hinged point of the second-stage transmission connecting rod on the third connecting rod and the hinged point of the second connecting rod on the third connecting rod, and a mounting connecting rod is slidingly connected to the second-stage transmission connecting rod and used for centering an oil cup.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to a linkage mechanism, a smoke collection chamber assembly, and a liftable range hood. Background Technology

[0002] As people's living standards improve, range hoods have become an indispensable kitchen appliance in modern homes. They are usually installed above the kitchen stove and can extract the fumes generated during cooking, thereby purifying the kitchen environment and improving people's comfort while cooking.

[0003] Currently, as users' demands for kitchen aesthetics continue to increase, lift-up range hoods that can perfectly conceal cabinets when turned off are gradually gaining popularity. Most existing lift-up range hoods are single-stage lift-up models, which use a single movable box with an air inlet that rises and falls relative to a fixed box. When turned off, it is hidden inside the fixed box for easy concealment, and when turned on, it extends out of the fixed box to lower the air inlet closer to the smoke source.

[0004] However, existing liftable range hoods place high demands on the adaptability of installation space, especially on the height of the fixed housing, which must be as small as possible. At the same time, in order to ensure the fume extraction effect, the height of the movable housing must be as large as possible so that the air inlet can be moved down as close as possible to the smoke source. This results in the movable housing, which is taller, easily interfering with the main body of the fan when it retracts into the fixed housing, which is shorter. There is a contradiction in the structural design between the two.

[0005] In addition, the oil cup located at the bottom of the movable box will also flip as the movable box is flipped, which may cause the oil to spill out during the flipping process. Summary of the Invention

[0006] To address the existing problems of conflicting structural designs between fixed and movable housings in existing lift-up range hoods, as well as the risk of oil spillage during lifting, this application provides a linkage mechanism, a smoke collection chamber assembly, and a lift-up range hood. This design balances the small height of the fixed housing with the large height of the movable housing, while also ensuring smooth lifting of the oil cup during start-up and shutdown, thus improving the range hood's installation compatibility and user experience.

[0007] According to one aspect of this application, a linkage mechanism is provided, comprising: a multi-link assembly including a first link, a second link, and a third link; the first link and the third link are respectively hinged to the front and rear of a fixed housing; both ends of the second link are respectively hinged to the first link and the third link; a primary transmission link hinged to the third link and used to connect a primary lifting component; a secondary transmission link hinged to the third link and used to connect a secondary lifting component; wherein the hinge point of the primary transmission link on the third link is located between the hinge point of the secondary transmission link on the third link and the hinge point of the second link on the third link; and a mounting link slidably connected to the secondary transmission link for uprighting an oil cup.

[0008] With this configuration, since the hinge point of the primary transmission link on the third link is located between the hinge point of the secondary transmission link on the third link and the hinge point of the second link on the third link, and the mounting link is slidably connected to the secondary transmission link, the lifting stroke of the secondary transmission link under the drive of the third link is always less than the lifting stroke of the primary transmission link. This ensures that the oil cup maintains its original posture during lifting and will not flip with the rotation of the primary lifting component, effectively avoiding the risk of oil spillage during lifting and lowering. Furthermore, the shorter lifting stroke of the secondary transmission link shortens the length of the mounting link, making its length less than the height of the fixed housing. This effectively solves the problem of the oil cup's lifting stroke exceeding the height of the fixed housing, avoiding the risk of structural interference between the mounting link and the top wall of the fixed housing due to its large length.

[0009] Furthermore, because the lifting stroke of the secondary transmission link is always less than that of the primary transmission link under the drive of the third link, the linkage mechanism of this application can also precisely limit the lifting stroke of the primary lifting component to always be greater than that of the secondary lifting component. This allows the primary and secondary lifting components to be able to unfold to form a taller movable box in the smoke collection state, ensuring that the air inlet on the primary lifting component is moved as low as possible to be closer to the smoke source, thus improving the smoke extraction effect. In the storage state, they can also be stacked to be stored in a shorter fixed box. This balances the structural design between the small height of the fixed box and the large height of the movable box, improving the installation adaptability of the range hood and facilitating cabinet enclosure.

[0010] Furthermore, in one embodiment of this application, the linkage mechanism can also be such that the mounting link is rotatably connected to the primary transmission link.

[0011] With this configuration, the linkage mechanism of this application can indirectly set the mounting link to the first-stage lifting component through the first-stage transmission link, so that the mounting link can rotate relative to the first-stage lifting component, so that the mounting link can drive the oil cup to rotate relative to the first-stage lifting component during the lifting process, ensuring that the oil cup can always maintain its original posture.

[0012] In one embodiment of this application, the linkage mechanism further includes a primary fixed connecting rod for fixedly connecting the primary lifting component. The front end of the primary fixed connecting rod is hinged to the front of the fixed housing, and the primary fixed connecting rod is hinged to the primary transmission connecting rod.

[0013] With this configuration, the linkage mechanism of this application can indirectly hinge the front end of the first-stage lifting component to the front of the fixed housing via the first-stage fixed connecting rod. This causes the first-stage lifting component connected to the first-stage fixed connecting rod to swing backward during the lifting process. This not only allows the first-stage lifting component to extend obliquely backward from the front of the fixed housing when in the smoke collection state, thereby guiding the front oil stains to the rear and forming a front-high-rear-low air intake shape to improve the smoke extraction effect, but also reduces the height of the first-stage lifting component when in the storage state, further reducing the height of the fixed housing and helping to meet the installation compatibility requirements of the lifting range hood.

[0014] In one embodiment of this application, the rotational connection point of the mounting link on the primary transmission link coincides with the hinge point of the primary fixed link on the primary transmission link.

[0015] With this configuration, the linkage mechanism of this application can rotatably connect the mounting link and the first-stage fixed link to the first-stage transmission link simultaneously through the same rotating shaft, which helps to simplify the connection structure and reduce assembly difficulty and cost.

[0016] In one embodiment of this application, the front end of the primary fixed connecting rod is hinged to the first connecting rod.

[0017] With this configuration, when the smoke collection chamber assembly switches from the smoke collection state to the storage state, the first-stage fixed connecting rod, together with the first-stage lifting component, can rotate around the rotation center of the first connecting rod relative to the fixed box. This not only pulls the first-stage lifting component forward to avoid structural interference with the wall during the lifting process, but also gives the front end of the first-stage lifting component an upward tendency to avoid structural interference with the fixed box.

[0018] In one embodiment of this application, the linkage mechanism further includes a secondary fixed connecting rod for fixing the secondary lifting component. The front end of the secondary fixed connecting rod is hinged to the front of the fixed housing, and the secondary fixed connecting rod is hinged to the secondary transmission connecting rod.

[0019] With this configuration, the linkage mechanism of this application can indirectly hinge the front end of the secondary lifting component to the front of the fixed housing via the secondary fixed connecting rod. This causes the secondary lifting component connected to the secondary fixed connecting rod to swing backward during the lifting process. This not only increases the height of the secondary lifting component in the smoke collection state to maximize the distance between the primary lifting component and the rear of the fixed housing, thus lowering the air inlet as much as possible to improve the smoke extraction effect, but also reduces the height of the secondary lifting component in the storage state, further reducing the height of the fixed housing. This is beneficial for meeting the installation compatibility requirements of the lifting range hood.

[0020] In one embodiment of this application, the sliding connection point of the mounting link on the secondary transmission link coincides with the hinge point of the secondary fixed link on the secondary transmission link.

[0021] With this configuration, the linkage mechanism of this application can slidably connect the mounting link and the secondary fixed link to the secondary transmission link respectively via the same rotating shaft, which simplifies the connection structure, reduces assembly difficulty, and lowers costs.

[0022] In one embodiment of this application, the front end of the secondary fixed connecting rod is hinged to the first connecting rod.

[0023] With this configuration, when the smoke collection chamber assembly switches from the smoke collection state to the storage state, the secondary fixed connecting rod, together with the secondary lifting component, can rotate around the rotation center of the first connecting rod relative to the fixed box, so that the front end of the secondary lifting component has an upward tendency to avoid structural interference with the fixed box.

[0024] In one embodiment of this application, the hinge point of the secondary fixed connecting rod on the first connecting rod coincides with the rotation center of the first connecting rod.

[0025] With this configuration, the linkage mechanism of this application can prevent the secondary lifting component from being pulled forward when the smoke collection chamber assembly switches from the smoke collection state to the storage state. This ensures that the secondary lifting component is always as close to the wall as possible, so as to make full use of the internal space of the fixed box and prevent excessive occupation of the smoke collection channel. In addition, when the smoke collection chamber assembly switches from the smoke collection state to the storage state, the forward movement distance of the primary lifting component will be greater than that of the secondary lifting component, so as to avoid structural interference with the rear sidewall caused by the mismatch in the forward movement distance between the primary and secondary lifting components.

[0026] In one embodiment of this application, the first connecting rod is used to fix the smoke baffle.

[0027] With this configuration, the smoke baffle can rotate as the first connecting rod rotates, thereby achieving synchronous linkage of the four motion modules—the smoke baffle, the primary lifting component, the secondary lifting component, and the oil cup—through the linkage mechanism.

[0028] The length of the first link is less than the length of the third link.

[0029] With this configuration, when the smoke collection chamber assembly switches between the smoke collection state and the storage state, the rotation angle of the first connecting rod will be greater than that of the third connecting rod. This ensures that the first connecting rod can drive the smoke baffle to rotate at a large angle, while avoiding structural interference between the third connecting rod and the top wall of the fixed housing when the third connecting rod rotates upward. This allows the smoke baffle to fully open the air inlet in the smoke collection state to form a larger smoke collection area, and to completely close the air inlet in the storage state. This makes the outer surface of the smoke baffle flush with the bottom wall of the fixed housing, keeping the bottom surface of the smoke collection chamber assembly flat so that it can be perfectly encased in the cabinet, achieving perfect cabinet enclosure and improving the overall aesthetics of the range hood.

[0030] According to another aspect of this application, one embodiment of this application further provides a smoke collection chamber assembly, including: a fixed housing; a primary lifting component, movably disposed in the fixed housing and having an air inlet; a secondary lifting component, movably disposed in the fixed housing; an oil cup, disposed below the primary lifting component; and a linkage mechanism as described in any of the above, disposed between the fixed housing, the primary lifting component, the secondary lifting component, and the oil cup, for linking the primary lifting component, the secondary lifting component, and the oil cup relative to the fixed housing.

[0031] In one embodiment of this application, the smoke collection chamber assembly further includes a smoke baffle plate, which is rotatably disposed at the front of the fixed housing for opening or closing the air inlet of the primary lifting component.

[0032] In one embodiment of this application, the first link of the linkage mechanism is fixedly connected to the smoke baffle.

[0033] According to another aspect of this application, one embodiment of this application further provides a liftable range hood, including: a fan assembly; and a smoke collection chamber assembly as described in any of the above claims, the smoke collection chamber assembly being connected to the fan assembly and used for absorbing cooking fumes under the negative pressure provided by the fan assembly. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a lift-type range hood according to an embodiment of this application when it is turned on; Figure 2 A cross-sectional schematic diagram is shown of the smoke collection chamber assembly in the smoke collection state of the lifting range hood according to the above embodiment of this application; Figure 3 It shows Figure 2 The diagram shows the state of the smoke collection chamber assembly. Figure 4 It shows Figure 2 The diagram shows the structural schematic of the linkage mechanism in the smoke collection chamber assembly. Figure 5 An exploded view of the linkage mechanism according to the above embodiments of this application is shown; Figure 6 A schematic diagram of the structure of the lift-type range hood according to the above embodiments of this application when it is turned off is shown; Figure 7 A cross-sectional schematic diagram of the smoke collection chamber assembly in the retracted state of the lift-type range hood according to the above embodiment is shown; Figure 8 It shows Figure 7 The diagram shows the state of the smoke collection chamber assembly. Figure 9 It shows Figure 7 The diagram shows the structural schematic of the linkage mechanism in the smoke collection chamber assembly.

[0035] Explanation of key component symbols: 10. Fan assembly; 11. Fan housing; 20. Smoke collection chamber assembly; 21. Fixed housing; 22. Primary lifting component; 220. Air inlet; 23. Secondary lifting component; 24. Linkage mechanism; 241. Multi-link assembly; 2411. First link; 2412. Second link; 2413. Third link; 242. Primary transmission link; 243. Secondary transmission link; 244. Primary fixed link; 245. Secondary fixed link; 246. Mounting link; 2460. Curved slide; 247. Mounting frame; 25. Oil cup; 26. Smoke baffle; 27. Lifting mechanism.

[0036] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a further detailed explanation of this application. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are 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 this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, 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", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] 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 application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] Considering that in some existing lift-type range hoods, the tall movable housing can easily interfere with the main fan body when retracting to the shorter fixed housing, creating a structural design contradiction; furthermore, the oil cup located at the bottom of the movable housing also flips during the flipping process, posing a risk of oil spillage. Therefore, this application creatively provides a linkage mechanism, a smoke collection chamber assembly, and a lift-type range hood, which balances the structural design between the small height of the fixed housing and the large height of the movable housing, while also ensuring smooth lifting and lowering of the oil cup during start-up and shutdown, improving the range hood's installation compatibility and user experience.

[0043] Specifically, such as Figure 1 and Figure 6 As shown, one embodiment of this application provides a liftable range hood, which may include a fan assembly 10 and a smoke collection chamber assembly 20. The smoke collection chamber assembly 20 is connected to the fan assembly 10 and is used to extract fumes under the negative pressure provided by the fan assembly 10. It is understood that this application uses the normal installation and use state of the liftable range hood as a reference, defining the side closer to the cooktop operator as the "front side," the side closer to the wall (i.e., the side away from the cooktop operator) as the "rear side," the side away from the ground as the "upper side," and the side closer to the ground as the "lower side." Furthermore, the cooktop operator's left and right hands when facing the front of the range hood correspond to the "left side" and "right side" of the range hood, respectively. All directional descriptions in the specification are based on the above references.

[0044] More specifically, such as Figures 1 to 9 As shown, the smoke collection chamber assembly 20 includes a fixed housing 21, a primary lifting component 22, a secondary lifting component 23, a linkage mechanism 24, and an oil cup 25. The fixed housing 21 is used to connect the fan assembly 10. The primary lifting component 22 is movably mounted on the fixed housing 21 and has an air inlet 220. The secondary lifting component 23 is movably mounted on the fixed housing 21. The oil cup 25 is located below the primary lifting component 22 and is used to collect oil flowing down through the primary lifting component 22. The linkage mechanism 24 is located between the fixed housing 21, the primary lifting component 22, the secondary lifting component 23, and the oil cup 25, so that the primary lifting component 22, the secondary lifting component 23, and the oil cup 25 can move up and down in tandem relative to the fixed housing 21. It is understood that the smoke collection chamber assembly 20 of this application may also include an oil mesh frame disposed within the fixed housing 21 and / or the primary lifting component 22, which will not be described in detail here.

[0045] In particular, such as Figure 2 , Figure 4 , Figure 7 as well as Figure 9 As shown, the linkage mechanism 24 may include a multi-link assembly 241, a primary transmission link 242, a secondary transmission link 243, and a mounting link 246. The multi-link assembly 241 includes a first link 2411, a second link 2412, and a third link 2413; the first link 2411 and the third link 2413 are respectively hinged to the front and rear of the fixed housing 21; the two ends of the second link 2412 are respectively hinged to the first link 2411 and the third link 2413. The primary transmission link 242 is hinged to the third link 2413 and is used to connect to the primary lifting component 22. The secondary transmission link 243 is hinged to the third link 2413 and is used to connect to the secondary lifting component 23. The hinge point A of the first-stage transmission link 242 on the third link 2413 is located between the hinge point B of the second-stage transmission link 243 on the third link 2413 and the hinge point C of the second link 2412 on the third link 2413. The mounting link 246 is slidably connected to the second-stage transmission link 243 and is used to straighten the oil cup 25. It is understood that the front part of the fixed housing 21 mentioned in this application refers to the portion of the fixed housing 21 away from the wall; correspondingly, the rear part of the fixed housing 21 mentioned in this application refers to the portion of the fixed housing 21 close to the wall; such that the first link 2411 is located in front of the second link 2412, and the third link 2413 is located behind the second link 2412.

[0046] It is worth noting that, such as Figure 4 , Figure 5 as well as Figure 9 As shown, because the hinge point A of the first-stage transmission link 242 on the third link 2413 is located between the hinge point B of the second-stage transmission link 243 on the third link 2413 and the hinge point C of the second link 2412 on the third link 2413, the hinge point B of the second-stage transmission link 243 is closer to the rotation center O of the third link 2413 relative to the fixed housing 21 than the hinge point C of the first-stage transmission link 242. Therefore, under the drive of the third link 2413, the lifting stroke of the first-stage transmission link 242 is always greater than that of the second-stage transmission link 243, which allows for smoother movement of the first-stage transmission link 242 and the second-stage transmission link 243. The sliding connection of the mounting rod 246 ensures that the oil cup 25 maintains its original posture during the lifting process and will not flip with the flipping of the first-stage lifting component 22, effectively avoiding the risk of oil spillage during the lifting process. Furthermore, the use of the second-stage transmission rod 243 with a slightly shorter lifting stroke can shorten the length of the mounting rod 246, making the length of the mounting rod 246 less than the height of the fixed box 21. This effectively solves the problem that the lifting stroke of the oil cup 25 exceeds the height of the fixed box 21, and avoids the risk of structural interference between the mounting rod 246 and the top wall of the fixed box 21 due to its large length.

[0047] Thus, as Figures 1 to 4 As shown, when the lift-type range hood is turned on, the first-stage lifting component 22 descends relative to the fixed housing 21 to extend downwards from the fixed housing 21. This causes the first-stage lifting component 22 to pull the third link 2413 downwards via the first-stage transmission link 242, and drives the second-stage lifting component 23 to descend downwards from the fixed housing 21 via the second-stage transmission link 243, so that the smoke collection chamber assembly 20 is in a smoke collection state. At the same time, since the descending stroke of the first-stage lifting component 22 is greater than that of the second-stage lifting component 23, the second-stage lifting component 23 can be positioned between the first-stage lifting component 22 and the fixed housing 21 to form a smoke collection channel connecting the fan assembly 10 and the air inlet 220, so that the air inlet 220 opened on the first-stage lifting component 22 can be as close as possible to the smoke source to improve the smoke extraction effect.

[0048] Similarly, such as Figures 6 to 9As shown, when the lift-type range hood is turned off, the primary lifting component 22 rises relative to the fixed housing 21 to retract the fixed housing 21. This causes the primary lifting component 22 to pull the third link 2413 upward via the primary transmission link 242, and drives the secondary lifting component 23 to rise via the secondary transmission link 243 to retract the fixed housing 21, so that the smoke collection chamber assembly 20 is in a retracted state. At the same time, the upward stroke of the primary lifting component 22 is greater than that of the secondary lifting component 23, so that the secondary lifting component 23 and the primary lifting component 22 can be stacked on top of each other and at least partially housed within the fixed housing 21. This helps to reduce the height of the fixed housing 21 and facilitates the aesthetic requirements of concealed installation. It is understood that the stacking mentioned in this application refers to the secondary lifting component 23 and the primary lifting component 22 overlapping completely or partially in the horizontal direction to reduce the height dimension in the vertical direction; in addition, the stacked secondary lifting component 23 and the primary lifting component 22 may be completely or partially located within the fixed housing 21, which will not be elaborated further in this application.

[0049] In other words, because the lifting stroke of the secondary transmission link 243 is always less than that of the primary transmission link 242 under the drive of the third link 2413, the linkage mechanism 24 of this application can also precisely limit the lifting stroke of the primary lifting component 22 to always be greater than that of the secondary lifting component 23. This allows the primary lifting component 22 and the secondary lifting component 23 to be able to unfold to form a taller movable box in the smoke collection state, ensuring that the air inlet 220 moves as low as possible to get closer to the smoke source and improve the smoke extraction effect. They can also be stacked to be stored in the shorter fixed box 21 in the storage state. This balances the structural design between the small height of the fixed box and the large height of the movable box, improves the installation adaptability of the range hood, and facilitates cabinet enclosure.

[0050] Furthermore, since the mounting link 246 is slidably connected to the secondary transmission link 243, the mounting link 246 is indirectly mounted to the secondary lifting component 23 via the secondary transmission link 243, allowing the mounting link 246 to slide relative to the secondary lifting component 23. Therefore, the linkage mechanism 24 of this application can also upright the oil cup 25 during lifting through the mounting link 246 slidably connected to the secondary transmission link 243, ensuring that the oil cup 25 maintains its original posture during lifting and does not move with the primary lifting component. The flipping of 22 effectively avoids the risk of oil spillage during the lifting and lowering of the oil cup 25, preventing oil stains from dripping onto the stovetop. At the same time, the use of the liftable secondary transmission linkage 243 shortens the length of the mounting linkage 246, making the length of the mounting linkage 246 less than the height of the fixed box 21. This effectively solves the problem that the lifting stroke of the oil cup 25 exceeds the height of the fixed box 21, and avoids the risk of structural interference between the mounting linkage 246 and the top wall of the fixed box 21 due to its large length.

[0051] Optionally, such as Figure 2 , Figure 4 , Figure 7 as well as Figure 9 As shown, the mounting rod 246 is rotatably connected to the primary transmission rod 242, so that the mounting rod 246 is indirectly set to the primary lifting component 22 through the primary transmission rod 242. This allows the mounting rod 246 to rotate relative to the primary lifting component 22, thereby causing the oil cup 25 to rotate relative to the primary lifting component 22 during the lifting process. This ensures that the oil cup 25 will not flip over with the rotation of the primary lifting component 22 during the lifting process, thus keeping it in an upright state and preventing oil from dripping onto the stovetop. It is understood that in other examples of this application, the mounting rod 246 may not be rotatably connected to the primary transmission rod 242. In this case, the oil cup 25 can simply be rotatably connected to the primary lifting component 22. This application will not elaborate further on this aspect.

[0052] For example, such as Figures 1 to 9 As shown, the front end of the primary lifting component 22 is hinged to the front of the fixed housing 21. The primary transmission link 242 is hinged to the rear end of the primary lifting component 22. Thus, as... Figures 1 to 3As shown, when the smoke collection chamber assembly 20 switches from the storage state to the smoke collection state, the rear end of the first-stage lifting component 22 swings downward relative to its front end, allowing the first-stage lifting component 22 to extend obliquely backward from the front of the fixed housing 21. This ensures that the second-stage lifting component 23 is located between the first-stage lifting component 22 and the rear of the fixed housing 21. This not only allows the oil accumulated at the front of the smoke collection chamber assembly 20 to be directly diverted to the rear, avoiding the cooking area below and preventing oil drips onto the cooking area, thus improving the user's cooking experience, but also creates a front-high, rear-low air intake pattern, ensuring that the airflow field has a component velocity pointing towards the wall, effectively preventing oil fumes from escaping and improving the smoke extraction effect. Furthermore, the lifting range hood of this application complements the cooking space when turned on; that is, the closer to the wall, the lower the height of the cooking space, in order to combine ergonomic design and achieve efficient space utilization.

[0053] And such Figures 6 to 8 As shown, when the smoke collection chamber assembly 20 switches from the smoke collection state to the storage state, the rear end of the first-stage lifting component 22 swings upward relative to the front end of the first-stage lifting component 22. This causes the tilt angle θ1 of the first-stage lifting component 22 in the smoke collection state to be greater than the tilt angle θ2 of the first-stage lifting component 22 in the storage state. This ensures that the height of the first-stage lifting component 22 gradually decreases as it rises, further reducing the height of the fixed housing 21. This is beneficial for meeting the installation compatibility requirements of the lifting range hood and achieving perfect cabinet enclosure. It is understandable that, as Figure 3 and Figure 8 As shown, the tilt angles θ1 and θ2 mentioned in this application refer to the angle between the lower edge of the first-stage lifting component 22 and the lower edge of the fixed housing 21.

[0054] Optionally, such as Figures 2 to 9As shown, the linkage mechanism 24 also includes a primary fixed connecting rod 244 for fixing the primary lifting component 22. The front end of the primary fixed connecting rod 244 is hinged to the front of the fixed housing 21, and the primary fixed connecting rod 244 is hinged to the primary transmission connecting rod 242, so that the front end of the primary lifting component 22 is indirectly hinged to the front of the fixed housing 21 through the primary fixed connecting rod 244. This causes the primary lifting component 22 connected to the primary fixed connecting rod 244 to swing backward during the lifting process. This not only allows the primary lifting component 22 to extend obliquely backward from the front of the fixed housing 21 when in the smoke collection state, so as to guide the front oil stains to the rear while forming a front-high and rear-low air intake shape, improving the smoke extraction effect, but also reduces the height of the primary lifting component 22 when in the storage state, so that the height of the fixed housing 21 can be further reduced, which is beneficial to meeting the installation compatibility requirements of the lifting range hood. It is understood that in other examples of this application, the front end of the first-stage lifting component 22 can also be directly hinged to the front of the fixed housing 21 without the need for indirect hinged connection using a connecting rod.

[0055] Preferably, such as Figure 4 and Figure 5 As shown, the front end of the primary fixed connecting rod 244 is hinged to the first connecting rod 2411. Thus, when the smoke collection chamber assembly 20 switches from the smoke collection state to the storage state, the primary fixed connecting rod 244, together with the primary lifting component 22, can rotate around the rotation center of the first connecting rod 2411 relative to the fixed housing 21. This not only pulls the primary lifting component 22 forward to avoid structural interference with the wall during its ascent, but also gives the front end of the primary lifting component 22 an upward tendency to avoid structural interference with the fixed housing 21.

[0056] Similarly, such as Figures 1 to 9 As shown, the front end of the secondary lifting component 23 is hinged to the front of the fixed housing 21, and the rear end of the secondary lifting component 23 is hinged to the secondary transmission link 243. Thus, as... Figures 1 to 3 As shown, when the smoke collection chamber assembly 20 switches from the storage state to the smoke collection state, the rear end of the secondary lifting component 23 swings downward relative to the front end of the secondary lifting component 23, so that the height of the secondary lifting component 23 can be increased to maximize the distance between the primary lifting component 22 and the rear of the fixed box 21, thereby realizing the downward movement of the air inlet 220 to improve the smoke extraction effect.

[0057] And such Figures 6 to 8As shown, when the smoke collection chamber assembly 20 switches from the smoke collection state to the storage state, the rear end of the secondary lifting component 23 swings upward relative to the front end of the secondary lifting component 23. This causes the tilt angle θ3 of the secondary lifting component 23 in the smoke collection state to be greater than the tilt angle θ4 of the secondary lifting component 23 in the storage state. This ensures that the height of the secondary lifting component 23 gradually decreases as it rises, which also helps to further reduce the height of the fixed housing 21. This is beneficial for meeting the installation compatibility requirements of the lifting range hood and achieving perfect cabinet enclosure. It is understandable that, as Figure 3 and Figure 8 As shown, the tilt angles θ3 and θ4 mentioned in this application refer to the angles between the lower edge of the secondary lifting component 23 and the lower edge of the fixed housing 21.

[0058] Optionally, such as Figures 2 to 9 As shown, the linkage mechanism 24 also includes a secondary fixed connecting rod 245 for fixing the secondary lifting component 23. The front end of the secondary fixed connecting rod 245 is hinged to the front of the fixed housing 21, and the secondary fixed connecting rod 245 is hinged to the secondary transmission connecting rod 243, so that the front end of the secondary lifting component 23 is indirectly hinged to the front of the fixed housing 21 through the secondary fixed connecting rod 245. This causes the secondary lifting component 23 connected to the secondary fixed connecting rod 245 to swing backward during the lifting process. This not only increases the height of the secondary lifting component 23 in the smoke collection state to maximize the distance between the rear of the primary lifting component 22 and the fixed housing 21, thus lowering the air inlet 220 as much as possible to improve the smoke extraction effect, but also reduces the height of the secondary lifting component 23 in the storage state, further reducing the height of the fixed housing 21, which is beneficial to meeting the installation compatibility requirements of the lifting range hood. It is understood that in other examples of this application, the front end of the secondary lifting component 23 can also be directly hinged to the front of the fixed housing 21 without the need for indirect hinged connection using a connecting rod.

[0059] Optionally, such as Figure 4 and Figure 9 As shown, the front end of the secondary fixed connecting rod 245 is hinged to the first connecting rod 2411. Thus, when the smoke collection chamber assembly 20 switches from the smoke collection state to the storage state, the secondary fixed connecting rod 245, together with the secondary lifting component 23, can rotate around the rotation center of the first connecting rod 2411 relative to the fixed housing 21, causing the front end of the secondary lifting component 23 to tend to rise, thereby avoiding structural interference with the fixed housing 21.

[0060] Specifically, the hinge point E of the secondary fixed connecting rod 245 on the first connecting rod 2411 is closer to the rotation center of the first connecting rod 2411 relative to the fixed housing 21 than the hinge point D of the primary fixed connecting rod 244 on the first connecting rod 2411. Thus, when the smoke collection chamber assembly 20 switches from the smoke collection state to the storage state, the forward movement distance of the primary lifting component 22 will be greater than the forward movement distance of the secondary lifting component 23, in order to avoid structural interference on the rear sidewalls due to a mismatch in the forward movement distances of the primary lifting component 22 and the secondary lifting component 23. It is understood that the rear sidewall of the secondary lifting component 23 of this application is wrapped behind the rear sidewall of the primary lifting component 22.

[0061] Preferably, such as Figure 4 and Figure 9 As shown, the hinge point E of the secondary fixed connecting rod 245 on the first connecting rod 2411 coincides with the rotation center of the first connecting rod 2411 relative to the fixed box 21. This prevents the secondary lifting component 23 from being pulled forward when the smoke collection chamber assembly 20 switches from the smoke collection state to the storage state, ensuring that the secondary lifting component 23 is always as close to the wall as possible, so as to make full use of the internal space of the fixed box 21 and prevent excessive occupation of the smoke collection channel.

[0062] According to the above embodiments of this application, as Figure 4 and Figure 9 As shown, the rotatable connection point of the mounting link 246 on the first-stage transmission link 242 preferably coincides with the hinge point F of the first-stage fixed link 244 on the first-stage transmission link 242, so that the mounting link 246 and the first-stage fixed link 244 can be rotatably connected to the first-stage transmission link 242 simultaneously through the same rotating shaft, which helps to simplify the connection structure and reduce assembly difficulty and cost.

[0063] Similarly, such as Figure 4 and Figure 9 As shown, the sliding connection point of the mounting link 246 on the secondary transmission link 243 preferably coincides with the hinge point G of the secondary fixed link 245 on the secondary transmission link 243, so that the mounting link 246 and the secondary fixed link 245 can be slidably connected to the secondary transmission link 243 and rotatably connected to the secondary transmission link 243 respectively through the same rotating shaft. This simplifies the connection structure, reduces assembly difficulty, and lowers costs.

[0064] It is worth noting that, such as Figure 4 , Figure 5 as well as Figure 9As shown, the mounting link 246 may have a curved slide 2460 to slide and engage with the structural components on the secondary transmission link 243 to form a sliding pair, further constraining the mounting link 246 so that the oil cup 25 can always maintain a vertical orientation during lifting (i.e., the opening of the oil cup 25 always faces upward), achieving smooth lifting of the oil cup 25. It is understood that the extension path of the curved slide 2460 mentioned in this application can be designed based on the movement trajectory of any point on the secondary transmission link 243 on the mounting link 246, while ensuring that the oil cup 25 always maintains a vertical orientation during lifting.

[0065] For example, the curved slide 2460 of the mounting link 246 can be implemented as a curved groove formed on the mounting link 246 and through which the rotating shaft slides, so as to slide and cooperate with the rotating shaft on the secondary transmission link 243 to form a sliding pair; or, in other examples of this application, the curved slide 2460 of the mounting link 246 can also be implemented as a curved slide rail provided on the mounting link 246 and slidably nested on the rotating shaft, which can still form the required sliding pair, and this application will not elaborate further on this.

[0066] According to the above embodiments of this application, as Figures 1 to 7 As shown, the smoke collection chamber assembly 20 may further include a smoke baffle 26, which is rotatably disposed at the front of the fixed housing 21 for opening or closing the air inlet 220 of the primary lifting component 22. Thus, when the smoke collection chamber assembly 20 switches from a retracted state to a smoke collection state, the smoke baffle 26 flips forward to open the air inlet 220 of the primary lifting component 22, forming a smoke-gathering area on the front side of the air inlet 220, preventing oil fumes from escaping from the front of the fixed housing 21 and improving the smoke extraction effect. Figure 3 and Figure 4 As shown, when the smoke collection chamber assembly 20 switches from the smoke collection state to the storage state, the smoke baffle 26 flips backward to close the air inlet 220 of the first-stage lifting component 22, effectively preventing flying insects or foreign objects from entering the range hood when the lifting range hood is in the off state, so as to protect the lifting range hood.

[0067] Optionally, such as Figures 2 to 7 As shown, the smoke baffle 26 is fixedly connected to the first link 2411 of the multi-link assembly 241, so that the smoke baffle 26 can rotate with the rotation of the first link 2411, thereby realizing the synchronous linkage of the four motion modules of the smoke baffle 26, the first-stage lifting component 22, the second-stage lifting component 23 and the oil cup 25 through the linkage mechanism 24.

[0068] Preferably, such as Figure 5As shown, the length L1 of the first link 2411 is less than the length L2 of the third link 2413. Thus, when the smoke collection chamber assembly 20 switches between the smoke collection state and the storage state, the rotation angle of the first link 2411 will be greater than that of the third link 2413. This ensures that the first link 2411 can drive the smoke baffle 26 to rotate at a large angle, preventing structural interference between the third link 2413 and the top wall of the fixed housing 21 when it rotates upwards. This allows the smoke baffle 26 to fully open the air inlet 220 in the smoke collection state to form a larger smoke-gathering area, and to completely close the air inlet 220 in the storage state. This ensures that the outer surface of the smoke baffle 26 is flush with the bottom wall of the fixed housing 21, keeping the bottom surface of the smoke collection chamber assembly 20 flat so that it can be perfectly encased within the cabinet, achieving perfect cabinet enclosure and improving the overall aesthetics of the range hood. It is understood that the link length L1 mentioned in this application refers to the radial distance between the hinge point of the second link 2412 on the first link 2411 and the rotation center of the first link 2411; the link length L2 mentioned in this application refers to the radial distance between the hinge point C of the second link 2412 on the third link 2413 and the rotation center O of the third link 2413.

[0069] According to the above embodiments of this application, as Figure 2 and Figure 7 As shown, the smoke collection chamber assembly 20 also includes a lifting mechanism 27 connected to the rear of the primary lifting component 22, used to drive the rear of the primary lifting component 22 to rise and fall, so that the primary lifting component 22 can automatically swing under the action of the lifting mechanism 27 to retract or extend the fixed box 21; at the same time, the primary lifting component 22 driven by the lifting mechanism 27 can also drive the secondary lifting component 23 and the oil cup 25 to rise and fall automatically through the linkage mechanism 24, and drive the smoke baffle 26 to automatically flip through the linkage mechanism 24. It is understood that the lifting mechanism 27 mentioned in this application can be implemented as an electric telescopic rod, a pneumatic telescopic rod, an electric push-pull rod, or a linear motor, as long as it can drive the rear of the primary lifting component 22 to rise and fall, and this application will not elaborate further.

[0070] Optionally, such as Figure 1 and Figure 6As shown, the fan assembly 10 includes a fan housing 11 fixedly connected to the fixed housing 21 and used to install the lifting mechanism 27, and a fan body (not shown in the figure) disposed within the fan housing 11, such that the maximum dimension of the lift-type range hood in the front-to-back direction is equal to the front-to-back dimension of the fixed housing 21, so that it can be completely concealed within the cabinet. Meanwhile, in order to simultaneously cover the dual-burner area, the dimension (width) of the smoke collection chamber assembly 20 in the left-to-right direction is generally larger than the width of the fan housing 11. Therefore, the lift-type range hood of this application can accommodate side cabinets in the space above the smoke collection chamber assembly 20 and located on the left and right sides of the fan housing 11, which is beneficial to improving the storage capacity of the kitchen. It is understood that in other examples of this application, the fan assembly 10 can also be installed on the ceiling to indirectly connect to the fixed housing 21 through a duct, so that the lift-type range hood is implemented as a ceiling-mounted range hood; this application will not elaborate further on this.

[0071] According to the above embodiments of this application, as Figures 2 to 9 As shown, the linkage mechanism 24 can also be fixedly connected to the mounting frame 247 of the fixed housing 21. The first link 2411 and the third link 2413 of the multi-link assembly 241 are respectively rotatably connected to the mounting frame 247 to form a four-link structure, so that the linkage mechanism 24 can be used as a relatively independent linkage mechanism. After being assembled and debugged separately, it can be directly installed in the fixed housing 21 through the mounting frame 247. After that, it is only necessary to connect the first-stage lifting component 22, the second-stage lifting component 23, the oil cup 25 and the smoke baffle 26 to the linkage mechanism 24 respectively to complete the assembly of the entire smoke collection chamber assembly 20, which helps to reduce the assembly difficulty.

[0072] It is worth noting that in the above embodiments of this application, each smoke collection chamber assembly 20 may include a pair of linkage mechanisms 24. The two linkage mechanisms 24 may be symmetrically arranged at the left and right ends of the fixed box 21 to ensure that the smoke collection chamber assembly 20 can smoothly switch states.

[0073] In addition, the lift-up range hood of this application can also be controlled by a voice module, which is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the lift-up range hood to perform corresponding operations, thereby realizing intelligent control of the lift-up range hood and improving the user experience.

[0074] It should be noted that in the above embodiments of this application, the fixed housing 21 can be implemented as a rectangular housing fixedly connected to the fan housing 11; of course, in other embodiments of this application, the fixed housing 21 can also be directly implemented as a fan housing or air duct or other connecting structure, which will not be described in detail here.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are quite specific and detailed. However, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A linkage mechanism, characterized in that, include: The multi-link assembly (241) includes a first link (2411), a second link (2412), and a third link (2413); the first link (2411) and the third link (2413) are respectively hinged to the front and rear of the fixed housing (21); the two ends of the second link (2412) are respectively hinged to the first link (2411) and the third link (2413). The first-stage transmission link (242) is hinged to the third link (2413) and is used to connect the first-stage lifting component (22). A secondary transmission link (243) is hinged to the third link (2413) and used to connect the secondary lifting component (23); wherein the hinge point of the primary transmission link (242) on the third link (2413) is located between the hinge point of the secondary transmission link (243) on the third link (2413) and the hinge point of the second link (2412) on the third link (2413); and The mounting link (246) is slidably connected to the secondary transmission link (243) and is used to straighten the oil cup (25).

2. The linkage mechanism according to claim 1, characterized in that, The mounting link (246) is rotatably connected to the primary transmission link (242).

3. The linkage mechanism according to claim 2, characterized in that, The linkage mechanism (24) further includes a primary fixed connecting rod (244) for fixedly connecting the primary lifting component (22). The front end of the primary fixed connecting rod (244) is used to hinge to the front of the fixed box (21), and the primary fixed connecting rod (244) is hinged to the primary transmission connecting rod (242). The rotational connection point of the mounting link (246) on the first-stage transmission link (242) coincides with the hinge point of the first-stage fixed link (244) on the first-stage transmission link (242).

4. The linkage mechanism according to claim 3, characterized in that, The front end of the primary fixed connecting rod (244) is hinged to the first connecting rod (2411).

5. The linkage mechanism according to claim 1, characterized in that, The linkage mechanism (24) further includes a secondary fixed connecting rod (245) for fixing the secondary lifting component (23). The front end of the secondary fixed connecting rod (245) is used to hinge to the front of the fixed box (21), and the secondary fixed connecting rod (245) is hinged to the secondary transmission connecting rod (243). The sliding connection point of the mounting link (246) on the secondary transmission link (243) coincides with the hinge point of the secondary fixed link (245) on the secondary transmission link (243).

6. The linkage mechanism according to claim 5, characterized in that, The front end of the secondary fixed connecting rod (245) is hinged to the first connecting rod (2411). The hinge point of the secondary fixed connecting rod (245) on the first connecting rod (2411) coincides with the rotation center of the first connecting rod (2411).

7. The linkage mechanism according to any one of claims 1 to 6, characterized in that, The first connecting rod (2411) is used to fix the smoke baffle (26); The length of the first link (2411) is less than the length of the third link (2413).

8. A smoke collection chamber assembly, characterized in that, include: Fixed enclosure (21); A primary lifting component (22) is vertically mounted on the fixed housing (21) and has an air inlet (220). The secondary lifting component (23) is vertically and vertically mounted on the fixed box (21); The oil cup (25) is located below the primary lifting component (22); and The linkage mechanism (24) as described in any one of claims 1 to 7 is disposed between the fixed housing (21), the primary lifting component (22), the secondary lifting component (23), and the oil cup (25) for linking the primary lifting component (22), the secondary lifting component (23), and the oil cup (25) relative to the fixed housing (21).

9. The smoke collection chamber assembly according to claim 8, characterized in that, The smoke collection chamber assembly (20) also includes a smoke baffle (26), which is rotatably disposed at the front of the fixed housing (21) for opening or closing the air inlet (220) of the first-stage lifting component (22). The first link (2411) of the linkage mechanism (24) is fixedly connected to the smoke baffle (26).

10. A lift-type range hood, characterized in that, include: Fan assembly (10); and The smoke collection chamber assembly (20) as described in claim 8 or 9 is connected to the fan assembly (10) and is used to absorb oil fumes under the negative pressure provided by the fan assembly (10).

Images