Range hood and control method of range hood

Abstract

The application provides an extractor hood and a control method thereof, and belongs to the technical field of kitchen appliances. The extractor hood comprises an upper box body, a lower box body, a driving mechanism, a transmission mechanism and a smoke guide plate. The upper box body is connected with the lower box body through the driving mechanism. When the driving mechanism works, the lower box body is driven to move towards the direction of extending into or moving away from the upper box body. The transmission mechanism is transmissionally connected with the lower box body and the smoke guide plate. The lower box body is provided with a smoke inlet matched with the smoke guide plate. When the lower box body is lowered, the smoke guide plate can be lowered through the transmission mechanism to open the smoke inlet. Through the driving mechanism, the lower box body can be relatively moved relative to the upper box body. Meanwhile, the smoke guide plate and the lower box body can be linked through the transmission mechanism to open the smoke inlet. When the extractor hood works, the smoke inlet and the smoke guide plate can be lowered to a position closer to the source of the oil fume, the rising stroke of the oil fume is effectively shortened, the capture efficiency of the oil fume is significantly improved, and the possibility of the oil fume diffusing to other areas of the kitchen is reduced.

Description

Technical Field

[0001] This application belongs to the field of kitchen appliance technology, and in particular relates to a range hood and a control method for the range hood. Background Technology

[0002] Range hoods are an indispensable kitchen appliance, effectively solving kitchen air quality problems and improving people's quality of life.

[0003] If the distance between the range hood's inlet and the area where the fumes are generated is large, the fumes will have a longer intake path and longer intake time, making it easier for fumes to escape during cooking. In order to avoid a large distance between the range hood's inlet and the area where the fumes are generated, the installation height of the range hood will be lowered. However, if the installation height of the range hood is lowered, the cooking space will be too small. Summary of the Invention

[0004] The purpose of this application is to provide a range hood and a control method for the range hood, which can reduce the distance between the smoke inlet of the range hood and the area where oil fumes are generated without reducing the installation height of the range hood.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: The first aspect of this application provides a range hood, including an upper housing, a lower housing, a drive mechanism, a transmission mechanism, and a smoke guide plate, wherein: The upper and lower housings are connected by a drive mechanism. When the drive mechanism is working, it drives the lower housing to move in or away from the upper housing. The transmission mechanism connects the lower housing and the smoke guide plate. The lower housing is equipped with a smoke inlet that cooperates with the smoke guide plate. When the lower housing descends, the transmission mechanism can drive the smoke guide plate to descend and open the smoke inlet.

[0006] In this application, the driving mechanism can move the lower housing relative to the upper housing, and the transmission mechanism can link the smoke guide plate and the lower housing to open the smoke inlet. This allows the range hood to move the smoke inlet and the smoke guide plate closer to the source of the cooking fumes during operation, effectively shortening the upward stroke of the fumes and significantly improving the efficiency of fume collection, thus reducing the possibility of fumes spreading to other areas of the kitchen. The transmission mechanism connects the lower housing and the smoke guide plate, avoiding the need for a separate driving device for the smoke guide plate, thereby simplifying the structure of the range hood and reducing its cost. The driving mechanism allows the lower housing to move relative to the upper housing, making the range hood provided in this application a height-adjustable range hood. When the range hood is not in operation, the overlapping area of ​​the upper and lower housings along the height direction reduces the overall height of the range hood. This reduces the distance between the smoke inlet and the fume-generating area without lowering the installation height of the range hood, and also facilitates concealed installation, optimizing the overall aesthetics of the kitchen.

[0007] In some implementations, the transmission mechanism includes a first transmission part and a second transmission part, which are respectively connected to the lower housing and the smoke guide plate; The range hood also includes an adjustment mechanism, which is located in the upper housing. By adjusting the adjustment mechanism, the first transmission part and the second transmission part can be switched between being connected and disconnected. The range hood also includes a closing structure, which is used to keep the smoke guide plate attached to the lower housing when the first and second transmission parts are disengaged.

[0008] In this implementation, by setting the transmission mechanism to include a first transmission part and a second transmission part, and introducing an adjustment mechanism and a closing structure, the range hood can flexibly choose the timing of opening the smoke inlet of the guide plate when the lower box descends, which significantly enhances the functional flexibility of the range hood and enables it to better adapt to diverse kitchen environments and usage scenarios.

[0009] In some implementations, the second transmission unit includes a transmission bracket and a first gear. The transmission bracket is mounted on the upper housing, and the first gear is supported on the transmission bracket by a first shaft. An adjustment mechanism can drive the first shaft to move along the axial direction of the first shaft, so that the first transmission unit and the first gear can switch between being connected and disconnected.

[0010] In this implementation, the axial movement of the first shaft is cleverly utilized to provide a compact and reliable switchable transmission structure, so as to control the opening of the smoke inlet of the smoke guide plate according to the actual cooking needs or the amount of oil fumes.

[0011] In some implementations, the adjustment mechanism includes a linear drive and a lever, with the linear drive connected to the lever; a mating groove is formed on the first shaft, and one end of the lever is inserted into the mating groove.

[0012] In this implementation, by setting the adjustment mechanism to include a linear drive device and a lever, and utilizing the mating groove on the first shaft, the precise axial movement of the first shaft can be achieved in a relatively simple and reliable manner.

[0013] In some implementations, the second transmission unit further includes a second gear, a third gear, and a smoke guide plate rack. The second gear is coaxially mounted on the first shaft with the first gear. The third gear meshes with the second gear and the smoke guide plate rack respectively. The smoke guide plate rack is slidably connected to the upper housing, and a smoke guide plate is provided at the bottom end of the smoke guide plate rack.

[0014] In this implementation, the second transmission unit also includes a second gear, a third gear, and a smoke guide plate rack. This not only enables the smoke inlet to open synchronously with the smoke guide plate through the transmission mechanism, but also simplifies the structure of the second transmission unit and reduces the cost of the range hood.

[0015] In some implementations, the closing structure is an elastic component, which is installed on the upper or lower housing and is directly or indirectly connected to the smoke guide plate.

[0016] In this implementation, the closed structure is set as an elastic component so that when the first transmission part and the second transmission part are separated, the smoke guide plate is tightly attached to the upper box under the action of the elastic force of the closed structure.

[0017] In some implementations, the first transmission part is a rack and pinion, which is directly or indirectly fixed to the upper housing, and the length of the first transmission part is along the height of the range hood.

[0018] In this implementation, the first transmission part is set as a rack and pinion to simplify the structure of the transmission mechanism and thus reduce the cost of the range hood.

[0019] In some implementations, the lower housing has two smoke inlets, and there are two smoke guide plates, namely a left smoke guide plate and a right smoke guide plate, which are respectively matched with the corresponding smoke inlets; there are two transmission mechanisms, namely a left transmission mechanism and a right transmission mechanism, which are respectively connected to the left smoke guide plate and the right smoke guide plate, and the left transmission mechanism and the right transmission mechanism are respectively matched with the corresponding adjustment mechanism.

[0020] In this implementation, by setting up dual smoke inlets, dual smoke guide plates, and independent transmission and adjustment mechanisms for each smoke guide plate, compared to a single smoke inlet design, users can selectively open one or two smoke inlets according to their actual cooking needs. For example, when only part of the stove is used, only the smoke guide plate in the corresponding area can be opened, thereby concentrating the suction power on the smoke-generating area, significantly improving the local smoke capture efficiency, reducing smoke diffusion, and lowering noise. In addition, since it is not necessary to open all smoke inlets, unnecessary energy consumption can be effectively reduced, improving the operating efficiency and energy saving of the range hood, allowing it to better adapt to the diverse cooking scenarios in modern kitchens.

[0021] The second aspect of this application provides a control method for a range hood, the range hood including an upper housing, a lower housing, a drive mechanism, a transmission mechanism, and a smoke guide plate; the upper housing and the lower housing are connected by the drive mechanism, and when the drive mechanism is working, it drives the lower housing to move in the direction of extending into or away from the upper housing; the transmission mechanism drives the lower housing and the smoke guide plate, and the lower housing is provided with a smoke inlet that cooperates with the smoke guide plate, so that when the lower housing descends, it can drive the smoke guide plate to descend through the transmission mechanism to open the smoke inlet; Control methods include: Collect the concentration of cooking fumes in the environment where the range hood is located; The drive mechanism and adjustment mechanism are controlled according to the oil fume concentration to control the descent height of the lower box and the distance between the smoke guide plate and the smoke inlet.

[0022] In this application, the lowering height of the casing and the opening and closing degree of the smoke guide plate can be adjusted according to the concentration of oil fumes, thereby improving the operating efficiency and energy saving of the range hood, significantly enhancing the intelligence level of the range hood, and enabling the range hood to better adapt to the diverse cooking scenarios in modern kitchens.

[0023] In some implementations, the transmission mechanism includes a first transmission part and a second transmission part, which are respectively connected to the lower housing and the smoke guide plate; the range hood also includes an adjustment mechanism, which is located in the upper housing, and can switch between mutual transmission connection and disengagement between the first and second transmission parts by adjusting the adjustment mechanism; the range hood also includes a closing structure, which is used to make the smoke guide plate adhere to the lower housing when the first and second transmission parts are disengaged; the lower housing has two smoke inlets, and there are two smoke guide plates, namely a left smoke guide plate and a right smoke guide plate, which are respectively matched with the corresponding smoke inlets; there are two transmission mechanisms, namely a left transmission mechanism and a right transmission mechanism, which are respectively connected to the left and right smoke guide plates, and the left and right transmission mechanisms are respectively matched with the corresponding adjustment mechanisms; the control method also includes: Based on the concentration of cooking fumes, determine the first target smoke guide plate that needs to be opened and the second target smoke guide plate that does not need to be opened from the left and right smoke guide plates; The control adjustment mechanism disengages the first and second transmission parts in the transmission mechanism corresponding to the second target smoke plate, and reconnects the first and second transmission parts in the transmission mechanism corresponding to the first target smoke plate.

[0024] In this implementation, when only part of the stove is used, only the smoke guide plate in the corresponding area can be opened, thereby concentrating the suction power on the smoke generation area, significantly improving the local smoke capture efficiency, reducing smoke diffusion and noise; in addition, since it is not necessary to open all the smoke inlets, unnecessary energy consumption can be effectively reduced, and the operating efficiency and energy saving of the range hood can be improved.

[0025] In some implementations, the transmission mechanism includes a first transmission part and a second transmission part, which are respectively connected to the lower housing and the smoke guide plate; the range hood also includes an adjustment mechanism, which is disposed in the upper housing, and can switch between the first transmission part and the second transmission part being connected and disconnected by adjusting the adjustment mechanism; the range hood also includes a closing structure, which is used to make the smoke guide plate adhere to the lower housing when the first transmission part and the second transmission part are disconnected; the smoke guide plate to be opened is the target smoke guide plate, and the control adjustment mechanism includes: After the drive mechanism has been running for a set time, the control adjustment mechanism is activated to connect the first transmission part and the second transmission part in the transmission mechanism corresponding to the target smoke guide plate; or... While the drive mechanism is running, the control and adjustment mechanism is used to make the first transmission part and the second transmission part in the transmission mechanism corresponding to the target smoke guide plate drive each other.

[0026] In this implementation, by limiting the opening and closing size of the target smoke guide plate, the range hood can better adapt to the diverse cooking scenarios in modern kitchens. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 Schematic diagram of the structure of the range hood provided in some embodiments of this application Figure 1 ; Figure 2 Schematic diagram of the structure of the range hood provided in some embodiments of this application Figure 2 ; Figure 3 This is a schematic diagram of the transmission mechanism and smoke guide plate provided in some embodiments of this application; Figure 4 A partial schematic diagram of the transmission mechanism when the adjustment mechanism is in a first state, as provided in some embodiments of this application; Figure 5 This is a schematic diagram of the structure of the adjustment mechanism provided in some embodiments of this application; Figure 6 This is a schematic diagram of the transmission mechanism and guide rail structure provided in some embodiments of this application; Figure 7 This is a partial schematic diagram of a transmission mechanism provided in some embodiments of this application; Figure 8 This is a schematic diagram of the structure of a range hood provided in some embodiments of this application; Figure 9 Schematic diagram of a partial structure of a range hood provided in some embodiments of this application Figure 1 ; Figure 10 Schematic diagram of a partial structure of a range hood provided in some embodiments of this application Figure 2 ; Figure 11 Schematic diagram of a partial structure of a range hood provided in some embodiments of this application Figure 3 ; Figure 12 The descent of the upper and lower housings, left smoke guide plate, and right smoke guide plate under different smoking modes provided in some embodiments of this application; Figure 13 A flowchart illustrating a control method for a range hood provided in some embodiments of this application.

[0029] The following are the labeling elements in the figure: 1000-Range Hood; 10-Upper housing; 20-Lower housing; 30-Drive mechanism; 40-Transmission mechanism; 50-Smoke guide plate; 60-Hanging strip assembly; 70-Lifting plate; 80-Adjustment mechanism; 90-Closed structure; 100-Guide rail structure; 11-Decorative cover; 12-Inner panel; 13-Top panel; 14-Maintenance panel; 121 - Left side panel; 122 - Back panel; 123 - Right side panel; 1221 - Strip-shaped clearance hole; 21-Smoke inlet; 211 - Left smoke inlet; 212 - Right smoke inlet; 31-Drive motor; 32-Lead screw structure; 33-Commutation structure; 321-Lead screw; 322-Slider; 41-First transmission unit; 42-Second transmission unit; 43-Left transmission mechanism; 44-Right transmission mechanism; 421-Transmission bracket; 422-First gear; 423-First shaft; 424-Second gear; 425-Third gear; 426-Smoke guide plate rack; 427-Second shaft; 4231 - Annular protrusion; 4232 - Mating groove; 51-Left smoke guide plate; 52-Right smoke guide plate; 71 - Main body of the board; 72 - Left folded edge; 73 - Right folded edge; 81-Linear drive unit; 82-Lever; 83-Adjusting bracket; 101-Guide rail; 102-Guide slider. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0031] In the description of this application, it should be understood that the terms "length", "width", "thickness", "top", "bottom", "inner", "outer", "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0032] To facilitate a clear description of the technical solutions of this application, the terms "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that the terms "first" and "second" do not necessarily imply that they are different.

[0033] In this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0035] It should be noted that in this application, the words "in one embodiment," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in one embodiment," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of the words "in one embodiment," "exemplarily," and "for example" is intended to present the relevant concepts in a specific manner.

[0036] Please see Figure 1 , Figure 1 Schematic diagram of the structure of the range hood 1000 provided in some embodiments of this application Figure 1 .

[0037] Please see Figure 1 The range hood 1000 provided in this application embodiment includes an upper housing 10, a lower housing 20 and a drive mechanism 30. The upper housing 10 and the lower housing 20 are connected by the drive mechanism 30. When the drive mechanism 30 is working, it drives the lower housing 20 to move in the direction of extending into or away from the upper housing 10.

[0038] Regarding the upper housing 10, the upper housing 10 refers to the structural part of the range hood 1000 that is typically fixedly installed inside a cabinet or on a wall. For some examples, please refer to [link / reference needed]. Figure 1 A hanging strip assembly 60 is provided on the back of the upper housing 10. The hanging strip assembly 60 is used to connect to the inner wall of the cabinet or the wall surface. In addition, the upper housing 10 usually houses the fan assembly of the range hood 1000, which is used to extract cooking fumes when it is working.

[0039] Regarding the lower housing 20, it refers to the component of the range hood 1000 that can move relative to the upper housing 10. The lower housing 20 typically extends downwards when the range hood 1000 is operating to be closer to the source of cooking fumes, and retracts upwards when not in operation to achieve concealment and space saving. See some examples. Figure 1 One end of the upper housing 10 is inserted into the lower housing 20. The drive mechanism 30 connects the upper housing 10 and the lower housing 20 and provides power for the movement of the lower housing 20 relative to the upper housing 10.

[0040] Please see Figure 2 , Figure 2Schematic diagram of the structure of the range hood 1000 provided in some embodiments of this application Figure 2 .

[0041] Please see Figure 2 The range hood 1000 also includes a smoke guide plate 50, and a smoke inlet 21 that cooperates with the smoke guide plate 50 is provided on the lower housing 20. The smoke guide plate 50 is used to open or close the smoke inlet 21; in addition, please see Figure 2 The range hood 1000 provided in this application embodiment also includes a transmission mechanism 40, which drives the lower housing 20 and the smoke guide plate 50. When the lower housing 20 descends, the transmission mechanism 40 can drive the smoke guide plate 50 to descend to open the smoke inlet 21.

[0042] Specifically, when the drive mechanism 30 moves the lower housing 20 downwards, the smoke guide plate 50 also moves downwards under the action of the transmission mechanism 40, and the speed at which the smoke guide plate 50 descends is greater than the speed at which the lower housing 20 descends, so that the smoke guide plate 50 and the lower housing 20 descend synchronously, and the smoke guide plate 50 can open the smoke inlet 21 so that the fumes can be sucked in from the smoke inlet 21; similarly, when the drive mechanism 30 moves in the opposite direction, the lower housing 20 can be reset and the smoke guide plate 50 can close the smoke inlet 21.

[0043] In this embodiment, the driving mechanism 30 can drive the lower housing 20 to move relative to the upper housing 10, and the transmission mechanism 40 can link the smoke guide plate 50 and the lower housing 20 to open the smoke inlet 21. When the range hood 1000 is working, it can move the smoke inlet 21 and the smoke guide plate 50 to a position closer to the source of oil fumes, effectively shortening the upward stroke of the oil fumes, thereby significantly improving the oil fume capture efficiency and reducing the possibility of oil fumes spreading to other areas of the kitchen; the transmission mechanism 40 connects the lower housing 20 and the smoke guide plate 50, avoiding the need for the smoke guide plate 50 to move relative to the upper housing 1000. A separate drive unit is provided, which helps to simplify the structure of the range hood 1000 and reduce its cost. The drive mechanism 30 can drive the lower housing 20 to move relative to the upper housing 10, so that the range hood 1000 provided in this embodiment is a liftable range hood. When the range hood 1000 is not in operation, the overlapping area of ​​the upper housing 10 and the lower housing 20 in the height direction reduces the overall height of the range hood 1000, which is conducive to the concealed installation of the range hood 1000 and optimizes the overall aesthetics of the kitchen.

[0044] It should also be noted that the smoke guide plate 50 provided in this application embodiment is a lifting smoke guide plate, rather than a flipping smoke guide plate. Flipping smoke guide plates 50 may cause problems such as occupying the upper space of the table and obstructing the view, while lifting smoke guide plates can effectively prevent such problems.

[0045] Please see Figure 3 , Figure 3 This is a schematic diagram of the transmission mechanism 40 and the smoke guide plate 50 provided in some embodiments of this application.

[0046] In some embodiments, see Figure 3 The transmission mechanism 40 includes a first transmission part 41 and a second transmission part 42, wherein the first transmission part 41 and the second transmission part 42 are respectively connected to the lower housing 20 and the smoke guide plate 50.

[0047] Please see Figure 3 The range hood 1000 also includes an adjustment mechanism 80, which is disposed on the upper housing 10. By adjusting the adjustment mechanism 80, the first transmission part 41 and the second transmission part 42 can be switched between being connected and disconnected. That is, the adjustment mechanism 80 has a first state and a second state. When the adjustment mechanism 80 is in the first state, the first transmission part 41 and the second transmission part 42 can be connected, and the first transmission part 41 can drive the second transmission part 42 to move when it moves. When the adjustment mechanism 80 is in the second state, the first transmission part 41 and the second transmission part 42 can be separated, and the first transmission part 41 cannot drive the second transmission part 42 to move when it moves.

[0048] The range hood 1000 provided in this application embodiment also includes a closed structure 90 ( Figure 3 (Not shown in the diagram) The closing structure 90 is connected to the upper housing 10 or the lower housing 20. The closing structure 90 is used to make the smoke guide plate 50 adhere to the lower housing 20 when the first transmission part 41 and the second transmission part 42 are separated, so that the smoke guide plate 50 is limited to the lower housing 20, so as to prevent the smoke guide plate 50 from moving downward under its own weight when the first transmission part 41 and the second transmission part 42 are separated.

[0049] Regarding the smoke guide plate 50 being attached to the lower housing 20 to close the smoke inlet 21, the smoke guide plate 50 is positioned below the smoke inlet 21 and is attached to the circumferential edge of the smoke inlet 21. In some examples, a sealing element may be provided on the smoke guide plate 50 or the lower housing 20, so that the smoke guide plate 50 can be sealed with the lower housing 20 to better close the smoke inlet 21.

[0050] When the lower housing 20 descends via the drive mechanism 30, if the first transmission part 41 and the second transmission part 42 are in a transmission connection state, the lower housing 20 will transmit the motion to the smoke guide plate 50 through the first transmission part 41 and the second transmission part 42 during the descent, so that the smoke guide plate 50 descends synchronously, and the descent speed of the smoke guide plate 50 is greater than the descent speed of the lower housing 20, so that the smoke guide plate 50 opens the smoke inlet 21. Conversely, when the lower housing 20 descends via the drive mechanism 30, if the first transmission part 41 and the second transmission part 42 disengage, the smoke guide plate 50 adheres to the lower housing 20 under the action of the closing structure 90 and closes the smoke inlet 21. When the drive mechanism 30 descends, the lower housing 20 will descend. Since the smoke guide plate 50 adheres to the lower housing 20, the lower housing 20 descends along with the smoke guide plate 50, and the smoke guide plate 50 is always in the state of closing the smoke inlet 21. When the smoke guide plate 50 descends, it drives the second transmission part 42 to move. However, since the first transmission part 41 and the second transmission part 42 disengage, the movement of the second transmission part 42 will not drive the movement of the first transmission part 41.

[0051] In this embodiment, by defining the transmission mechanism 40 as including a first transmission part 41 and a second transmission part 42, and introducing an adjustment mechanism 80 and a closing structure 90, the range hood 1000 can flexibly select the timing for the smoke guide plate 50 to open the smoke inlet 21 when the lower housing 20 descends, as follows: For example, in some scenarios, when the drive mechanism 30 is activated to lower the lower housing 20, the adjustment mechanism 80 is simultaneously adjusted so that the first transmission part 41 and the second transmission part 42 are in transmission connection. During the entire descent of the lower housing 20, the smoke guide plate 50 descends at a speed greater than that of the lower housing 20 under the drive of the transmission mechanism 40, so that the distance between the smoke guide plate 50 and the smoke inlet 21 is as large as possible, that is, the smoke guide plate 50 opens and closes more.

[0052] For example, in some scenarios, when the drive mechanism 30 is activated to drive the lower housing 20 to descend, the adjustment mechanism 80 is simultaneously adjusted so that the first transmission part 41 and the second transmission part 42 are disengaged. At this time, the smoke guide plate 50 adheres to the lower housing 20 under the action of the closing structure 90 to close the smoke inlet 21, and descends together with the lower housing 20, that is, the lower housing 20 and the smoke guide plate 50 descend at the same speed. After the lower housing 20 has descended a certain distance, the adjustment mechanism 80 is adjusted again to make the first transmission part 41 and the second transmission part 42 connected. When the lower housing 20 descends, the descending speed of the smoke guide plate 50 is greater than the descending speed of the lower housing 20, so as to open the smoke inlet 21.

[0053] This can be understood as follows: when the drive mechanism 30 starts and lowers the lower housing 20 to a certain height, the adjustment mechanism 80 connects the first transmission part 41 and the second transmission part 42 at different times, thereby changing the gap between the smoke guide plate 50 and the smoke inlet 21 along the height direction, achieving various smoke extraction conditions and effects. Furthermore, the lower housing 20 can be lowered to different heights according to actual cooking needs or the amount of smoke, thus improving the user experience.

[0054] In this embodiment of the application, by setting the transmission mechanism 40 to include a first transmission part 41 and a second transmission part 42, and introducing an adjustment mechanism 80 and a closing structure 90, the functional flexibility of the range hood 1000 is significantly enhanced, enabling it to better adapt to diverse kitchen environments and usage scenarios.

[0055] In some embodiments, see Figure 3 The second transmission unit 42 includes a transmission bracket 421 and a first gear 422. The transmission bracket 421 is mounted on the upper housing 10, and the first gear 422 is supported on the transmission bracket 421 by a first shaft 423.

[0056] Regarding the transmission bracket 421, the transmission bracket 421 is a frame used to support other components in the second transmission part 42, such as the first gear 422. It is set on the upper housing 10. In some examples, the transmission bracket 421 can be made of metal sheet stamping, casting or injection molding of high-strength engineering plastic, and fixed to the upper housing 10 by bolts, welding or riveting.

[0057] Regarding the first gear 422, in some examples, the first gear 422 can be integrally formed on the first shaft 423, or in other examples, the first gear 422 and the first shaft 423 can be set as two parts, and the first gear 422 is fixed on the first shaft 423.

[0058] See some examples. Figure 3The first transmission part 41 can be configured as a rack and pinion structure. The first transmission part 41 can be directly or indirectly fixed to the lower housing 20, and its length extends along the height direction of the range hood 1000. The first transmission part 41 meshes with the first gear 422. When the lower housing 20 moves, it can drive the first transmission part 41 to move, thereby driving the first gear 422 meshing with the first transmission part 41 to rotate. Alternatively, in other examples, the first transmission part 41 can be configured to include a mating rack and at least one mating gear. The mating rack is fixed to the lower housing 20, and its length extends along the height direction of the range hood 1000. The mating rack is connected to the first gear 422 through the mating gear. It should be noted that by limiting the first transmission part 41 to a rack and pinion structure, the structure of the transmission mechanism 40 can be simplified.

[0059] Please see Figures 4-5 , Figure 4 This is a partial schematic diagram of the transmission mechanism 40 when the adjustment mechanism 80 is in a first state according to some embodiments of this application. Figure 5 This is a schematic diagram of the structure of the adjustment mechanism 80 provided in some embodiments of this application.

[0060] In this embodiment, the first shaft 423 can move relative to the transmission bracket 421 along its own axis. Adjusting the adjustment mechanism 80 can drive the first shaft 423 to move along its own axis, allowing the first transmission part 41 and the first gear 422 to switch between mutual transmission connection and disengagement. For details, please refer to... Figure 4 This illustrates the transmission connection between the first transmission unit 41 and the first gear 422. When the adjustment mechanism 80 is adjusted to the second state, the adjustment mechanism 80 will drive the first shaft 423 along... Figure 4 The middle arrow A points to the direction of movement so that the first transmission part 41 and the first gear 422 disengage.

[0061] In this embodiment, the axial movement of the first shaft 423 is cleverly utilized to provide a compact and reliable switchable transmission structure, so as to control the opening of the smoke inlet 21 of the smoke guide plate 50 according to the actual cooking needs or the amount of oil fumes.

[0062] Regarding the adjustment mechanism 80, please refer to some embodiments. Figure 5 The adjustment mechanism 80 includes a linear drive device 81 and a lever 82. The linear drive device 81 is connected to the lever 82. The linear drive device 81 is used to drive the lever 82 to move along the axis parallel to the first shaft 423.

[0063] In some examples, the linear drive device 81 can be configured as a cylinder, a hydraulic cylinder, a linear motor, or an electromagnetic lock; when the linear drive device 81 is an electromagnetic lock, the locking shaft of the electromagnetic lock is connected to the lever 82.

[0064] Please see Figure 4 A mating groove 4232 is formed on the first shaft 423. One end of the lever 82 is inserted into the mating groove 4232 so that when the linear drive device 81 moves, causing the lever 82 to move, the lever 82 can move along its own axis, driving the first shaft 423 to move. Specifically, when the linear drive device 81 moves, it drives the lever 82 to move in a linear direction. Since the lever 82 is inserted into the mating groove 4232, its moving force acts on the wall of the mating groove 4232, thereby forcing the first shaft 423 to displace along its own axis.

[0065] Regarding the 4232 mating groove, please refer to some examples. Figure 4 The mating groove 4232 can be set to be annular; of course, the shape of the mating groove 4232 is not limited to only annular. For example, the mating groove 4232 can also be set to be a circular or square hole on the first shaft 423.

[0066] When the mating groove 4232 is annular, see some examples. Figure 4 A portion of the outer periphery of the first shaft 423 protrudes to the side in a direction away from the central axis of the first shaft 423 to form an annular protrusion 4231, and a mating groove 4232 is provided on the annular protrusion 4231.

[0067] Regarding lever 82, please refer to some examples. Figure 5 The lever 82 can be set to be Y-shaped to facilitate the insertion of the ring-shaped groove 4232.

[0068] In this embodiment, by setting the adjustment mechanism 80 to include a linear drive device 81 and a lever 82, and utilizing the mating groove 4232 on the first shaft 423, the precise axial movement of the first shaft 423 can be achieved in a relatively simple structure and reliable operation.

[0069] It should be noted that some embodiments described above describe the adjustment mechanism 80 as including a linear drive device 81 and a lever 82. In other embodiments, the adjustment mechanism 80 may also be configured to include only the linear drive device 81. The output end of the linear drive device 81 is connected to the end face of one end of the first shaft 423. When the linear drive device 81 is activated, it drives the first shaft 423 to move along its own axial direction.

[0070] Regarding the adjustment mechanism 80 being located on the upper housing 10, please refer to [link / reference] in some embodiments. Figure 5The adjustment mechanism 80 also includes an adjustment bracket 83, which is fixed on the upper housing 10, and the linear drive device 81 is fixed on the adjustment bracket 83; or, in other embodiments, the adjustment mechanism 80 may be configured not to include the adjustment bracket 83, and the linear drive device 81 may be directly fixed on the upper housing 10.

[0071] Please see Figures 6-7 , Figure 6 This is a schematic diagram of the transmission mechanism 40 and guide rail structure 100 provided in some embodiments of this application. Figure 7 This is a partial schematic diagram of a transmission mechanism 40 provided in some embodiments of this application.

[0072] In some embodiments, see Figure 6 The second transmission unit 42 also includes a smoke guide plate rack 426, which is slidably connected to the upper housing 10. The length of the smoke guide plate rack 426 extends along the height direction of the range hood 1000. A smoke guide plate 50 is provided at the bottom end of the smoke guide plate rack 426, and the smoke guide plate rack 426 is connected to the first gear 422 for transmission.

[0073] When the first transmission unit 41 meshes with the first gear 422 and the drive mechanism 30 is activated, the smoke guide plate rack 426 can move relative to the upper housing 10, thereby driving the smoke guide plate 50 connected to the smoke guide plate rack 426 to move along the height direction.

[0074] Regarding the sliding connection between the smoke guide plate rack 426 and the upper housing 10, in some examples, a guide rail structure 100 can be provided on the upper housing 10. Please refer to [link to relevant documentation]. Figure 6 The diagram illustrates the guide rail structure 100. The smoke guide plate rack 426 is slidably connected to the upper housing 10 via the guide rail structure 100. For details, please refer to [link to documentation]. Figure 6 The guide rail structure 100 includes a guide rail 101 and a guide slider 102. The guide rail 101 is fixed on the upper housing 10, and the guide slider 102 is disposed on the guide rail 101 and slidably connected to the guide rail 101. The smoke guide plate rack 426 is fixed on the guide slider 102. It should be noted that the sliding connection method between the guide slider 102 and the guide rail 101 is not specifically limited in this embodiment, as long as the two can be slidably connected.

[0075] In this embodiment, the second transmission part 42 is further provided with a smoke guide plate rack 426 and a smoke guide plate 50 is provided at the bottom end of the smoke guide plate rack 426, so as to stably drive the smoke guide plate 50 to move along the height direction.

[0076] Regarding the transmission connection between the smoke guide plate rack 426 and the first gear 422, please refer to some embodiments. Figure 6The second transmission unit 42 also includes a second gear 424 and a third gear 425. The second gear 424 is coaxially mounted on the first shaft 423 with the first gear 422. The third gear 425 meshes with the second gear 424 and the smoke guide plate rack 426 respectively.

[0077] Please see Figure 7 The second transmission unit 42 also includes a second shaft 427, which is supported on the transmission bracket 421. In some examples, a third gear 425 may be fixed on the second shaft 427, and the second shaft 427 may be rotatably connected to the transmission bracket 421; or, the second shaft 427 may be fixed on the transmission bracket 421, and the third gear 425 may be rotatably connected to the second shaft 427.

[0078] When the first transmission unit 41 meshes with the first gear 422 and the drive mechanism 30 is activated, the operation of the first transmission unit 41 can drive the first gear 422 to rotate. The rotation of the first gear 422 can drive the second gear 424 to rotate via the first shaft 423. The rotation of the second gear 424 drives the third gear 425 meshing with it to rotate, which in turn drives the smoke guide plate rack 426 to move along the height direction via the third gear 425. Specifically, when the height of the first transmission unit 41 decreases, that is, along the height direction... Figure 6 When the middle arrow Z points to the direction of movement, the first gear 422 moves along... Figure 6 The direction indicated by the middle arrow a is counterclockwise, and the second gear 424 also rotates along the same direction. Figure 6 Rotating counterclockwise in the direction indicated by the middle arrow a, the third gear 425 moves along... Figure 6 Rotating clockwise in the direction indicated by the middle arrow b, the smoke guide plate rack 426 moves along... Figure 6 The direction indicated by the middle arrow Z is downward, meaning that when the height of the first transmission part 41 decreases, the height of the smoke guide plate rack 426 can decrease synchronously; conversely, when the height of the first transmission part 41 increases, the height of the smoke guide plate rack 426 can increase synchronously.

[0079] It should be noted that, since the first transmission unit 41 meshes with the first gear 422 and the drive mechanism 30 is activated to cause the lower housing 20 to move downward, the descending speed of the smoke guide plate 50 is greater than the descending speed of the lower housing 20. In one implementation, the number of teeth of the second gear 424 can be set to be greater than the number of teeth of the first gear 422, and the radius of the second gear 424 can be greater than the radius of the first gear 422. For example, the ratio of the number of teeth of the second gear 424 to the number of teeth of the first gear 422 can be set to be greater than 1 and less than or equal to 2. The radius of the third gear 425 is the same as the radius of the second gear 424, and the number of teeth of both is also the same. Alternatively, the radius and / or the number of teeth of the third gear 425 can be set to be different from the radius and / or the number of teeth of the second gear 424. In this way, the descending speed of the smoke guide plate 50 is greater than the descending speed of the lower housing 20.

[0080] In this embodiment, by providing the second transmission part 42, a second gear 424 and a third gear 425 are also included. This not only enables the smoke inlet 21 to be opened synchronously through the transmission mechanism 40 and the smoke guide plate 50, but also simplifies the structure of the second transmission part 42 and reduces the cost of the range hood 1000.

[0081] It should be noted that, as described in some embodiments above, the second transmission unit 42 also includes a second gear 424 and a third gear 425. In other embodiments, the number of gears that can be set between the first gear 422 and the smoke guide plate rack 426 is not limited to only two gears, and more gears can also be set. This application embodiment will not elaborate further.

[0082] Please see Figure 6 The diagram roughly illustrates the closed structure 90. In some embodiments, the closed structure 90 can be configured as an elastic component, and the closed structure 90 is directly or indirectly connected to the smoke guide plate 50.

[0083] Regarding the direct or indirect connection between the closed structure 90 and the smoke guide plate 50, one end of the closed structure 90 can be directly connected to the smoke guide plate 50, and the other end of the closed structure 90 can be connected to the upper housing 10 or the lower housing 20; alternatively, one end of the closed structure 90 can be connected to the smoke guide plate rack 426 or the guide slider 102 to achieve an indirect connection between the closed structure 90 and the smoke guide plate 50, and the other end of the closed structure 90 can be connected to the upper housing 10. When the first transmission part 41 disengages from the second transmission part 42, the smoke guide plate 50 adheres tightly to the upper box 10 under the elastic force of the closing structure 90 to close the smoke inlet 21. When the drive mechanism 30 is activated to move the lower box 20 downward, the lower box 20 drives the smoke guide plate 50 to move and the two remain relatively stationary, that is, the two descend at the same speed. When the first transmission part 41 meshes with the first gear 422 and the drive mechanism 30 is activated to move the lower box 20 downward, the descending speed of the smoke guide plate 50 is greater than the descending speed of the lower box 20 and the closing structure 90 is further stretched.

[0084] Regarding the closed structure 90 being an elastic component, in some examples, the closed structure 90 can be configured as a spring.

[0085] In this embodiment, by setting the closed structure 90 as an elastic component, the smoke guide plate 50 is tightly attached to the upper box 10 under the action of the elastic force of the closed structure 90 when the first transmission part 41 and the second transmission part 42 are disengaged.

[0086] It should be noted that some embodiments described above describe the closed structure 90 as an elastic component. In other embodiments, the closed structure 90 may also include a first magnetic component and a second magnetic component. The first magnetic component is disposed on the smoke guide plate 50, and the second magnetic component is disposed on the lower housing 20. When the first transmission part 41 and the second transmission part 42 are disengaged, the first magnetic component and the second magnetic component attract each other, so that the smoke guide plate 50 is tightly attached to the upper housing 10.

[0087] In some examples, at least one of the first magnetic component and the second magnetic component can be an electromagnet. When the first transmission part 41 and the second transmission part 42 are connected, the electromagnet is not energized, and there is no force between the first magnetic component and the second magnetic component. When the first transmission part 41 and the second transmission part 42 are disconnected, the electromagnet is energized, and the first magnetic component and the second magnetic component attract each other, so that the smoke guide plate 50 is tightly attached to the upper housing 10.

[0088] Please see Figures 8-11 , Figure 8 This is a schematic diagram of the structure of a range hood 1000 provided in some embodiments of this application. Figures 9-11 This is a partial structural schematic diagram of a range hood 1000 provided in some embodiments of this application.

[0089] In some embodiments, see Figure 8 The lower housing 20 has two smoke inlets 21. There are two smoke guide plates 50, namely the left smoke guide plate 51 and the right smoke guide plate 52. The left smoke guide plate 51 and the right smoke guide plate 52 are respectively matched with the corresponding smoke inlets 21. For ease of description, the smoke inlet 21 matched with the left smoke guide plate 51 is called the left smoke inlet 211, and the smoke inlet 21 matched with the right smoke guide plate 52 is called the right smoke inlet 212. The left smoke guide plate 51 is used to open or close the left smoke inlet 211, and the right smoke guide plate 52 is used to open or close the right smoke inlet 212.

[0090] Please see Figure 9 and Figure 10 There are two transmission mechanisms 40, namely the left transmission mechanism 43 and the right transmission mechanism 44. The left transmission mechanism 43 and the right transmission mechanism 44 are connected to the left smoke guide plate 51 and the right smoke guide plate 52 respectively. The left transmission mechanism 43 and the right transmission mechanism 44 are respectively coordinated with the corresponding adjustment mechanism 80.

[0091] For example, in some scenarios, the lower housing 20 can be controlled to descend while the left smoke guide plate 51 opens the left smoke inlet 211 and the right smoke guide plate 52 closes the right smoke inlet 212. Specifically, the adjusting mechanism 80 cooperating with the right transmission mechanism 44 is adjusted so that the first transmission part 41 and the second transmission part 42 of the right transmission mechanism 44 are disengaged; when the drive mechanism 30 is activated to drive the lower housing 20 to descend, the adjusting mechanism 80 cooperating with the left transmission mechanism 43 is simultaneously adjusted so that the first transmission part 41 and the second transmission part 42 of the left transmission mechanism 43 are connected; or, after the lower housing 20 has descended a certain distance, the adjusting mechanism 80 cooperating with the left transmission mechanism 43 is adjusted so that the first transmission part 41 and the second transmission part 42 of the left transmission mechanism 43 are connected. After the lower housing 20 has descended to the designated position, the left smoke guide plate 51 opens the left smoke inlet 211.

[0092] For example, in some scenarios, the lower housing 20 can be controlled to descend while the right smoke guide plate 52 opens the right smoke inlet 212 and the left smoke guide plate 51 closes the left smoke inlet 211. Specifically, the adjusting mechanism 80 cooperating with the left transmission mechanism 43 is adjusted so that the first transmission part 41 and the second transmission part 42 of the left transmission mechanism 43 are disengaged; when the drive mechanism 30 is activated to drive the lower housing 20 to descend, the adjusting mechanism 80 cooperating with the right transmission mechanism 44 is simultaneously adjusted so that the first transmission part 41 and the second transmission part 42 of the right transmission mechanism 44 are connected; or, after the lower housing 20 has descended a certain distance, the adjusting mechanism 80 cooperating with the right transmission mechanism 44 is adjusted so that the first transmission part 41 and the second transmission part 42 of the right transmission mechanism 44 are connected. After the lower housing 20 has descended to the designated position, the right smoke guide plate 52 opens the right smoke inlet 212.

[0093] For example, in some scenarios, the lower housing 20 can be controlled to descend while the right smoke guide plate 52 opens the right smoke inlet 212 and the left smoke guide plate 51 opens the left smoke inlet 211. Specifically, when the drive mechanism 30 is activated to drive the lower housing 20 to descend, the adjustment mechanism 80 cooperating with the left transmission mechanism 43 is adjusted simultaneously to make the first transmission part 41 and the second transmission part 42 of the left transmission mechanism 43 drively connected. Alternatively, after the lower housing 20 has descended a certain distance, the adjustment mechanism 80 cooperating with the left transmission mechanism 43 is adjusted to make the first transmission part 41 and the second transmission part 42 of the left transmission mechanism 43 drively connected. After the lower housing 20 has descended to the designated position, the left smoke guide plate 51 opens the left smoke inlet 211. When the drive mechanism 30 is activated to lower the lower housing 20, the adjustment mechanism 80 that cooperates with the right transmission mechanism 44 is adjusted to make the first transmission part 41 and the second transmission part 42 of the right transmission mechanism 44 drive together. Alternatively, after the lower housing 20 has lowered a certain distance, the adjustment mechanism 80 that cooperates with the right transmission mechanism 44 is adjusted to make the first transmission part 41 and the second transmission part 42 of the right transmission mechanism 44 drive together. After the lower housing 20 has lowered to the position, the right smoke guide plate 52 opens the right smoke inlet 212.

[0094] In this embodiment, by configuring dual smoke inlets 21, dual smoke guide plates 50, and independent transmission and adjustment mechanisms 80 for each smoke guide plate 50, compared to a single smoke inlet 21 design, users can selectively open one or two smoke inlets 21 according to their actual cooking needs. For example, when only part of the stove is used, only the corresponding area's smoke guide plate 50 can be opened, thereby concentrating the suction power on the smoke-generating area, significantly improving the local smoke capture efficiency, reducing smoke diffusion, and lowering noise. In addition, since it is not necessary to open all smoke inlets 21, unnecessary energy consumption can be effectively reduced, improving the operating efficiency and energy saving of the range hood 1000, enabling the range hood 1000 to better adapt to the diverse cooking scenarios of modern kitchens.

[0095] In some embodiments, see Figure 8 and Figure 11 The upper housing 10 includes a decorative cover 11, an inner cladding panel 12, a top panel 13, and a maintenance panel 14. The inner cladding panel 12 is U-shaped, and the maintenance panel 14 is located on the front side of the inner cladding panel 12, forming a rectangular tube shape. The top panel 13 is located above the inner cladding panel 12 and the maintenance panel 14, and connects the inner cladding panel 12 and the maintenance panel 14. The decorative cover 11 covers the maintenance panel 14 and the outer side of the inner cladding panel 12. For details, please refer to... Figure 11The inner panel 12 includes a left side panel 121, a back panel 122, and a right side panel 123. The left side panel 121, the back panel 122, and the right side panel 123 are connected in sequence and form a U-shape. The back panel 122 is positioned directly opposite the maintenance panel 14. The decorative cover 11 is U-shaped and covers the maintenance panel 14 and the left side panel 121 and the right side panel 123 of the inner panel 12.

[0096] In some embodiments, a decorative cover 11 may be provided to fit the lower housing 20 to seal off oil fumes.

[0097] In some embodiments, see Figure 9 and Figure 10 A left transmission mechanism 43 and a right transmission mechanism 44 are respectively provided on the left side plate 121 and the right side plate 123 of the inner enclosure 12. Please refer to [link / reference]. Figure 9 The transmission bracket 421 of the left transmission mechanism 43 is fixed to the outer surface of the left side plate 121. Please refer to [link / reference]. Figure 10 The transmission bracket 421 of the right transmission mechanism 44 is fixed on the outer side of the right side plate 123; in addition, an adjustment mechanism 80 that cooperates with the left transmission mechanism 43 can be provided and supported on the inner side of the left side plate 121, and an adjustment mechanism 80 that cooperates with the right transmission mechanism 44 can be provided and supported on the inner side of the right side plate 123.

[0098] In some embodiments, see Figure 9 The range hood 1000 also includes a lifting plate 70, which is connected to the drive mechanism 30. The lower housing 20 is fixed on the lifting plate 70. The first transmission part 41 of the left transmission mechanism 43 and the first transmission part 41 of the right transmission mechanism 44 are fixed on the lifting plate 70 so that the first transmission part 41 is fixed on the lower housing 20 at intervals.

[0099] Specifically, please see Figure 9 and Figure 10 The lifting plate 70 includes a plate body 71, a left folded edge 72, and a right folded edge 73, wherein the plate body 71 is provided with Figure 11 The middle rear panel 122 is located away from the maintenance panel 14. The left folded edge 72 and the right folded edge 73 are respectively located on the left and right sides of the main body 71 and connected to the main body 71. The left folded edge 72 and the right folded edge 73 are perpendicular to the main body 71. The left folded edge 72 and the right folded edge 73 are respectively facing the left side panel 121 and the right side panel 123 of the inner panel 12. The first transmission part 41 of the left transmission mechanism 43 is fixed on the left folded plate, and the first transmission part 41 of the right transmission mechanism 44 is fixed on the right folded edge 73.

[0100] In some embodiments, see Figure 11A guide rail structure 100 is provided between the inner panels 12. The guide rail structure 100 on the inner panel 12 is connected to the lifting plate 70 to guide the lifting plate 70 to move stably along the height direction of the range hood 1000.

[0101] In some embodiments, see Figure 11 The drive mechanism 30 includes a drive motor 31 and a lead screw structure 32. The drive motor 31 is supported on the top plate 13 and is connected to the lead screw structure 32 via a reversing structure 33. The reversing structure 33 can be configured as a worm gear structure. The slider 322 of the lead screw structure 32 is connected to the lifting plate 70. For details, please refer to [link to details]. Figure 11 The lead screw structure 32 is located on the inner side of the back plate 122. The lead screw 321 of the lead screw structure 32 is vertically arranged. The back plate 122 is provided with a strip-shaped clearance hole 1221. The slider 322 of the lead screw structure 32 passes through the strip-shaped clearance hole 1221 and is connected to the lifting plate 70.

[0102] It should be noted that some embodiments described above describe the drive mechanism 30 as including a drive motor 31 and a lead screw structure 32. In other embodiments, the drive mechanism 30 may also be a cylinder, a hydraulic cylinder, or a linear motor, etc.

[0103] In some embodiments, see Figure 9 The range hood 1000 also includes a smoke detection device, which is installed on the lower housing 20. The smoke detection device, the drive mechanism 30, and the adjustment mechanism 80 are all connected to the control device of the range hood 1000. The smoke detection device is used to detect the size of the smoke, and the control device controls the working state of the drive mechanism 30 and the adjustment mechanism 80 according to the signal detected by the smoke detection device.

[0104] In some examples, the smoke detection device can be set as a temperature sensor. The temperature detected by the smoke detection device is used to determine the size of the smoke. Specifically, for example, when the temperature detected by the smoke detection device is relatively low, the control device determines that the smoke is relatively small; when the temperature detected by the smoke detection device is relatively high, the control device determines that the smoke is relatively large.

[0105] In this embodiment, by including a smoke detection device in the range hood 1000, the intelligence level of the range hood 1000 is significantly enhanced, so as to realize the automatic adjustment of the height of the lower box 20 and the opening and closing of the smoke guide plate 50.

[0106] In some embodiments, the range hood 1000 includes at least two smoke extraction modes, wherein each smoke extraction mode controls the lower housing 20 to descend to a different height.

[0107] For example, the range hood 1000 can be set to include three smoke extraction modes: low smoke extraction mode, medium smoke extraction mode, and high smoke extraction mode. When operating the three modes, the lower housing 20 descends to the heights L1, L2, and L3, respectively, where L1 < L2 < L3. The smoke level can be detected by the smoke detection device, and the range hood 1000 can be controlled to operate in low smoke extraction mode, medium smoke extraction mode, or high smoke extraction mode.

[0108] In some embodiments, there are at least two smoke detection devices, and the left smoke guide plate 51 opens the left smoke inlet 211 and the right smoke guide plate 52 opens the right smoke inlet 212 based on the detection status of each smoke detection device.

[0109] Please see Figure 12 , Figure 12 The images show the descent of the upper and lower housing 20, the left smoke guide plate 51, and the right smoke guide plate 52 under different smoking modes provided in some embodiments of this application.

[0110] In the Figure 12 Before describing the relevant content, the following points should be clarified: The linear drive device 81 of the adjustment mechanism 80 can be configured as an electromagnetic lock. The electromagnetic lock of the adjustment mechanism 80 that cooperates with the left smoke guide plate 51 can be called the left electromagnetic lock. When the left electromagnetic lock is in the closed state, the first transmission part 41 and the second transmission part 42 of the left transmission mechanism 43 are in a disengaged state. When the left electromagnetic lock is in the open state, the first transmission part 41 and the second transmission part 42 of the left transmission mechanism 43 are in a connected state. Similarly, the electromagnetic lock of the adjustment mechanism 80 that cooperates with the right smoke guide plate 52 can be called the right electromagnetic lock. When the right electromagnetic lock is in the closed state, the first transmission part 41 and the second transmission part 42 of the right transmission mechanism 44 are in a disengaged state. When the right electromagnetic lock is in the open state, the first transmission part 41 and the second transmission part 42 of the right transmission mechanism 44 are in a connected state. Furthermore, when the first transmission part 41 and the second transmission part 42 of the transmission mechanism 40 are in a connected state and the lower housing 20 descends, the descending speed of the smoke guide plate 50 is twice the descending speed of the lower housing 20.

[0111] Please see Figure 12When the smoke detection device detects no smoke from the left-side stove, if it also detects no smoke from the right-side stove, it controls both the left and right electromagnetic locks to be closed, and prevents the drive mechanism 30 from starting, so that the downward travel of the lower housing 20, left smoke guide plate 51, and right smoke guide plate 52 is all 0. If the smoke detection device detects only light smoke from the right-side stove, it controls the left electromagnetic lock to be closed and the right electromagnetic lock to be opened, and starts the drive mechanism 30, so that the downward travel of the lower housing 20 is L1, the downward travel of the right smoke guide plate 52 is 2*L1, and the downward travel of the left smoke guide plate 51 is... The stroke of the lower housing 20 is 0; if the smoke detection device detects that the right stove produces medium smoke, it controls the left electromagnetic lock to be closed and the right electromagnetic lock to be open, and controls the downward stroke of the lower housing 20 to be L2, the downward stroke of the right smoke guide plate 52 to be 2*L2, and the downward stroke of the left smoke guide plate 51 to be 0; if the smoke detection device detects that the right stove produces heavy smoke, it controls the left electromagnetic lock to be closed and the right electromagnetic lock to be open, and controls the downward stroke of the lower housing 20 to be L3, the downward stroke of the right smoke guide plate 52 to be 2*L3, and the downward stroke of the left smoke guide plate 51 to be 0, where L1 < L2 < L3.

[0112] Please see Figure 12 When the smoke detection device detects a small amount of smoke from the left-side stove, and if the smoke detection device detects no smoke from the right-side stove, it controls the left electromagnetic lock to open and the right electromagnetic lock to close, and controls the drive mechanism 30 to start, so that the lower housing 20 moves downward by L1 and the left smoke guide plate 51 moves downward by 2*L1; if the smoke detection device detects a small amount of smoke from the right-side stove, it controls the left and right electromagnetic locks to open, and controls the lower housing 20 to move downward by L1, and the left and right smoke guide plates 51 and 52 to move downward by L1. The stroke is 2*L1; if the smoke detection device detects that the right stove produces medium smoke, it controls the left and right electromagnetic locks to open, and controls the lower housing 20 to move downward by L2, and the left smoke guide plate 51 and right smoke guide plate 52 to move downward by 2*L2; if the smoke detection device detects that the right stove produces heavy smoke, it controls the left and right electromagnetic locks to open, and controls the lower housing 20 to move downward by L3, and the left smoke guide plate 51 and right smoke guide plate 52 to move downward by 2*L3, where L1 < L2 < L3.

[0113] For situations where the smoke detection device detects smoke and heavy smoke from the left-side stove, please refer to the description above. This application's embodiments will not elaborate further.

[0114] Please see Figure 13 , Figure 13 A flowchart illustrating a control method for a range hood 1000 provided in some embodiments of this application.

[0115] This application provides a control method for a range hood 1000, wherein the range hood includes an upper housing 10, a lower housing 20, a drive mechanism 30, a transmission mechanism 40, and a smoke guide plate 50; the upper housing 10 and the lower housing 20 are connected by the drive mechanism 30, and when the drive mechanism 30 is working, it drives the lower housing 20 to move in or away from the upper housing 10; the transmission mechanism 40 drives the lower housing 20 and the smoke guide plate 50, and the lower housing 20 is provided with a smoke inlet 21 that cooperates with the smoke guide plate 50. When the lower housing 20 descends, it can drive the smoke guide plate 50 to descend through the transmission mechanism 40 to open the smoke inlet 21.

[0116] Control methods include: The concentration of cooking fumes in the environment where the range hood 1000 is located was collected; The oil fume concentration control drive mechanism 30 controls the descent height of the lower box 20 and the distance between the smoke guide plate 50 and the smoke inlet 21.

[0117] In this embodiment, the lower housing 20 can be lowered and the opening and closing degree of the smoke guide plate 50 can be adjusted according to the concentration of oil fumes (i.e., the distance between the smoke guide plate 50 and the smoke inlet 21 is controlled), which improves the operating efficiency and energy saving of the range hood 1000, significantly enhances the intelligence level of the range hood 1000, and enables the range hood 1000 to better adapt to the diverse cooking scenarios in modern kitchens.

[0118] In some embodiments, the transmission mechanism 40 includes a first transmission part 41 and a second transmission part 42, which are respectively connected to the lower housing 20 and the smoke guide plate 50; the range hood 1000 also includes an adjustment mechanism 80, which is disposed in the upper housing 10, and can switch between the first transmission part 41 and the second transmission part 42 being connected and disconnected by adjusting the adjustment mechanism 80; the range hood 1000 also includes a closing structure 90, which is used to close the smoke guide plate when the first transmission part 41 and the second transmission part 42 are disconnected. 50 is attached to the lower housing 20; the lower housing 20 has two smoke inlets 21, there are two smoke guide plates 50, and the two smoke guide plates 50 are left smoke guide plate 51 and right smoke guide plate 52 respectively. The left smoke guide plate 51 and right smoke guide plate 52 are respectively engaged with the corresponding smoke inlets 21. There are two transmission mechanisms 40, and the two transmission mechanisms 40 are left transmission mechanism 43 and right transmission mechanism 44 respectively. The left transmission mechanism 43 and right transmission mechanism 44 are respectively connected to the left smoke guide plate 51 and right smoke guide plate 52, and the left transmission mechanism 43 and right transmission mechanism 44 are respectively engaged with the corresponding adjustment mechanism 80.

[0119] Control methods also include: Based on the concentration of oil fumes, determine the first target smoke guide plate that needs to be opened and the second target smoke guide plate that does not need to be opened from the left smoke guide plate 51 and the right smoke guide plate 52; The control adjustment mechanism 80 disengages the first transmission part 41 and the second transmission part 42 in the transmission mechanism 40 corresponding to the second target smoke plate, and connects the first transmission part 41 and the second transmission part 42 in the transmission mechanism 40 corresponding to the first target smoke plate.

[0120] For example, when it is determined that the left smoke guide plate 51 needs to be opened based on the obtained oil fume concentration, the left smoke guide plate 51 is the first target smoke guide plate and the right smoke guide plate 52 is the second target smoke guide plate. The adjustment mechanism 80 that cooperates with the left smoke guide plate 51 is controlled so that the adjustment mechanism 80 can adjust the second transmission part 42 of the left transmission mechanism 43 to be connected with the first transmission part 41. The adjustment mechanism 80 that cooperates with the right smoke guide plate 52 is controlled so that the adjustment mechanism 80 can adjust the second transmission part 42 of the right transmission mechanism 44 to be disengaged from the first transmission part 41.

[0121] For example, when it is determined that the right smoke guide plate 52 needs to be opened based on the obtained oil fume concentration, the right smoke guide plate 52 is the first target smoke guide plate and the left smoke guide plate 51 is the second target smoke guide plate. The adjustment mechanism 80 that cooperates with the right smoke guide plate 52 is controlled so that the adjustment mechanism 80 can adjust the second transmission part 42 of the right transmission mechanism 44 to be connected with the first transmission part 41. The adjustment mechanism 80 that cooperates with the left smoke guide plate 51 is controlled so that the adjustment mechanism 80 can adjust the second transmission part 42 of the left transmission mechanism 43 to be disengaged from the first transmission part 41.

[0122] In this embodiment, when only part of the stove is used, only the smoke guide plate 50 in the corresponding area can be turned on, thereby concentrating the suction power on the smoke generation area, significantly improving the local smoke capture efficiency, reducing smoke diffusion and noise; in addition, since it is not necessary to turn on all the smoke inlets 21, unnecessary energy consumption can be effectively reduced, and the operating efficiency and energy saving of the range hood 1000 can be improved.

[0123] In some embodiments, the transmission mechanism 40 includes a first transmission part 41 and a second transmission part 42, which are respectively connected to the lower housing 20 and the smoke guide plate 50; the range hood 1000 also includes an adjustment mechanism 80, which is disposed on the upper housing 10, and can switch between the first transmission part 41 and the second transmission part 42 being connected and disconnected by adjusting the adjustment mechanism 80; the range hood 1000 also includes a closing structure 90, which is used to make the smoke guide plate 50 adhere to the lower housing 20 when the first transmission part 41 and the second transmission part 42 are disconnected; the smoke guide plate 50 to be opened is the target smoke guide plate, and the control drive mechanism 30 and the adjustment mechanism 80 include: After the drive mechanism 30 has been running for a set time, the control adjustment mechanism 80 is activated to connect the second transmission part 42 in the transmission mechanism 40 corresponding to the target smoke guide plate with the first transmission part 41; or... While the drive mechanism 30 is running, the control adjustment mechanism 80 is used to make the second transmission part 42 in the transmission mechanism 40 corresponding to the target smoke guide plate drive and connect with the first transmission part 41.

[0124] After the drive mechanism 30 has been running for a set time, the control adjustment mechanism 80 connects the second transmission part 42 in the transmission mechanism 40 corresponding to the target smoke guide plate with the first transmission part 41. This allows the lower box 20 to descend first, and after the lower box 20 has descended a certain distance, the target smoke guide plate 50 gradually opens.

[0125] While the drive mechanism 30 is running, the control adjustment mechanism 80 connects the second transmission part 42 in the transmission mechanism 40 corresponding to the target smoke guide plate with the first transmission part 41, so that the lower box 20 descends while the target smoke guide plate opens the smoke guide plate 50.

[0126] For example, in some scenarios, the lower housing 20 can be controlled to descend while the left smoke guide plate 51 opens the left smoke inlet 211 and the right smoke guide plate 52 closes the right smoke inlet 212. In this case, the left smoke guide plate 51 is the target smoke guide plate. Specifically, the adjustment mechanism 80 that cooperates with the right transmission mechanism 44 is adjusted so that the first transmission part 41 and the second transmission part 42 of the right transmission mechanism 44 are disengaged. When the drive mechanism 30 is started to drive the lower housing 20 to descend, the adjustment mechanism 80 that cooperates with the left transmission mechanism 43 is adjusted at the same time so that the first transmission part 41 and the second transmission part 42 of the left transmission mechanism 43 are connected. Alternatively, after the lower housing 20 has descended a certain distance, the adjustment mechanism 80 that cooperates with the left transmission mechanism 43 is adjusted so that the first transmission part 41 and the second transmission part 42 of the left transmission mechanism 43 are connected. After the lower housing 20 has descended to the designated position, the left smoke guide plate 51 opens the left smoke inlet 211.

[0127] For example, in some scenarios, the lower housing 20 can be controlled to descend while the right smoke guide plate 52 opens the right smoke inlet 212 and the left smoke guide plate 51 closes the left smoke inlet 211. In this case, the right smoke guide plate 52 is the target smoke guide plate. Specifically, the adjustment mechanism 80 that cooperates with the left transmission mechanism 43 is adjusted so that the first transmission part 41 and the second transmission part 42 of the left transmission mechanism 43 are disengaged. When the drive mechanism 30 is started to drive the lower housing 20 to descend, the adjustment mechanism 80 that cooperates with the right transmission mechanism 44 is adjusted at the same time so that the first transmission part 41 and the second transmission part 42 of the right transmission mechanism 44 are connected. Alternatively, after the lower housing 20 has descended a certain distance, the adjustment mechanism 80 that cooperates with the right transmission mechanism 44 is adjusted so that the first transmission part 41 and the second transmission part 42 of the right transmission mechanism 44 are connected. After the lower housing 20 has descended to the designated position, the right smoke guide plate 52 opens the right smoke inlet 212.

[0128] For example, in some scenarios, the lower housing 20 can be controlled to descend while the right smoke guide plate 52 opens the right smoke inlet 212 and the left smoke guide plate 51 opens the left smoke inlet 211. At this time, both the left smoke guide plate 51 and the right smoke guide plate 52 are target smoke guide plates. Specifically, when the drive mechanism 30 is activated to drive the lower housing 20 to descend, the adjustment mechanism 80 cooperating with the left transmission mechanism 43 is adjusted simultaneously so that the first transmission part 41 and the second transmission part 42 of the left transmission mechanism 43 are connected. Alternatively, after the lower housing 20 has descended a certain distance, the adjustment mechanism 80 cooperating with the left transmission mechanism 43 is adjusted again so that the first transmission part 41 and the second transmission part 42 of the left transmission mechanism 43 are connected. After the lower housing 20 has descended to the designated position, the left smoke guide plate 51 opens the left smoke inlet 211. When the drive mechanism 30 is activated to lower the lower housing 20, the adjustment mechanism 80 that cooperates with the right transmission mechanism 44 is adjusted to make the first transmission part 41 and the second transmission part 42 of the right transmission mechanism 44 drive together. Alternatively, after the lower housing 20 has lowered a certain distance, the adjustment mechanism 80 that cooperates with the right transmission mechanism 44 is adjusted to make the first transmission part 41 and the second transmission part 42 of the right transmission mechanism 44 drive together. After the lower housing 20 has lowered to the position, the right smoke guide plate 52 opens the right smoke inlet 212.

[0129] In this embodiment of the application, by limiting the opening and closing size of the target smoke guide plate, the range hood 1000 can better adapt to the diverse cooking scenarios in modern kitchens.

[0130] In some embodiments, the descent height of the lower chamber 20 is determined based on the detected concentration of oil fumes. That is, when the detected smoke concentration is relatively high, the descent height of the lower chamber 20 can be controlled to be relatively high; when the detected smoke concentration is relatively low, the descent height of the lower chamber 20 can be controlled to be relatively low.

[0131] Based on the same inventive concept, embodiments of this application also provide a control device, including a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, it implements the control method as described in any of the above claims.

[0132] Based on the same inventive concept, embodiments of this application also provide a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor or an electronic device having the processor, it implements the steps of the control method as described in any of the preceding claims.

[0133] Based on the same inventive concept, embodiments of this application also provide a computer program product, including a computer program or instructions. When the computer program or instructions are executed by a processor or an electronic device having the processor, they implement the steps in the control method described in any of the preceding claims.

[0134] From the above description of the embodiments, those skilled in the art will understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0135] It should be understood that the apparatuses and processes disclosed in the several embodiments provided in this application can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of modules or units is only a logical functional division. In actual implementation, there may be other division methods, such as multiple units or components being combined or integrated into another device. In addition, some features may be omitted or not performed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms.

[0136] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units. That is, it can be located in one place or distributed in multiple different locations. Depending on the actual needs, some or all of the units can be selected to achieve the purpose of this solution.

[0137] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit; they can also exist physically separately; or some units can be integrated into one unit while others exist physically separately. The integrated units described above can be implemented in hardware or as software functional units.

[0138] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, all or part of the technical solutions of the embodiments of this application can be embodied in the form of a software product. This software product is stored in a storage medium. The software product includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0139] It should be noted that all or part of the above embodiments provided in this application (e.g., part or all of any feature) can be arbitrarily combined or combined with each other.

[0140] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0141] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A range hood, characterized in that, It includes an upper housing, a lower housing, a drive mechanism, a transmission mechanism, and a smoke guide plate, wherein: The upper housing and the lower housing are connected by the drive mechanism. When the drive mechanism is working, it drives the lower housing to move in or away from the upper housing. The transmission mechanism drives the lower housing and the smoke guide plate. The lower housing is provided with a smoke inlet that cooperates with the smoke guide plate. When the lower housing descends, the transmission mechanism can drive the smoke guide plate to descend to open the smoke inlet. The transmission mechanism includes a first transmission part and a second transmission part, which are respectively connected to the lower housing and the smoke guide plate. The range hood also includes an adjustment mechanism, which is located in the upper housing. By adjusting the adjustment mechanism, the first transmission part and the second transmission part can switch between being connected and disconnected. The range hood also includes a closing structure, which is used to make the smoke guide plate adhere to the lower housing when the first transmission part and the second transmission part are disengaged; The second transmission unit includes a transmission bracket and a first gear. The transmission bracket is disposed on the upper housing, and the first gear is supported on the transmission bracket by a first shaft. The adjustment mechanism can drive the first shaft to move along the axial direction of the first shaft, so that the first transmission unit and the first gear can switch between being connected and disconnected. The second transmission unit further includes a second gear, a third gear, and a smoke guide plate rack. The second gear is coaxially mounted on the first shaft with the first gear. The third gear meshes with the second gear and the smoke guide plate rack respectively. The smoke guide plate rack is slidably connected to the upper housing. The bottom end of the smoke guide plate rack is provided with the smoke guide plate.

2. The range hood as described in claim 1, characterized in that, The adjustment mechanism includes a linear drive device and a lever, the linear drive device being connected to the lever; a mating groove is formed on the first shaft, and one end of the lever is inserted into the mating groove.

3. The range hood as described in any one of claims 1-2, characterized in that, The closing structure is an elastic component, and is disposed on the upper or lower housing. The closing structure is directly or indirectly connected to the smoke guide plate; and / or... The first transmission part is a rack and pinion, and the first transmission part is directly or indirectly fixed to the lower housing.

4. The range hood as described in any one of claims 1-2, characterized in that, The lower housing has two smoke inlets, and there are two smoke guide plates, which are a left smoke guide plate and a right smoke guide plate, respectively. The left smoke guide plate and the right smoke guide plate are respectively matched with the corresponding smoke inlets. The transmission mechanism comprises two parts, namely a left transmission mechanism and a right transmission mechanism. The left transmission mechanism and the right transmission mechanism are respectively connected to the left smoke guide plate and the right smoke guide plate, and the left transmission mechanism and the right transmission mechanism are respectively coordinated with the corresponding adjustment mechanism.

5. A control method for a range hood, characterized in that, The range hood includes an upper housing, a lower housing, a drive mechanism, a transmission mechanism, and a smoke guide plate. The upper housing and the lower housing are connected by the drive mechanism, which, when operating, moves the lower housing towards or away from the upper housing. The transmission mechanism drives the lower housing and the smoke guide plate. The lower housing has a smoke inlet that cooperates with the smoke guide plate. When the lower housing descends, the transmission mechanism drives the smoke guide plate to descend, opening the smoke inlet. The transmission mechanism includes a first transmission part and a second transmission part, which are respectively connected to the lower housing and the smoke guide plate. The range hood also includes an adjustment mechanism located in the upper housing. Adjusting the adjustment mechanism allows the first and second transmission parts to switch between being connected and disconnected. The range hood also includes a closing structure, which allows the smoke guide plate to adhere to the lower housing when the first and second transmission parts are disconnected. The second transmission unit includes a transmission bracket and a first gear. The transmission bracket is disposed on the upper housing, and the first gear is supported on the transmission bracket by a first shaft. The adjustment mechanism can drive the first shaft to move along the axial direction of the first shaft, so that the first transmission unit and the first gear can switch between being connected and disconnected. The second transmission unit further includes a second gear, a third gear, and a smoke guide plate rack. The second gear is coaxially mounted on the first shaft with the first gear. The third gear meshes with the second gear and the smoke guide plate rack respectively. The smoke guide plate rack is slidably connected to the upper housing. The bottom end of the smoke guide plate rack is provided with the smoke guide plate. The control method includes: The concentration of cooking fumes in the environment where the range hood is located is collected; The drive mechanism and the adjustment mechanism are controlled according to the oil fume concentration to control the descent height of the lower box and the distance between the smoke guide plate and the smoke inlet.

6. The control method for a range hood as described in claim 5, characterized in that, The lower housing has two smoke inlets. There are two smoke guide plates, one on the left and one on the right. The left and right smoke guide plates are respectively matched with the corresponding smoke inlets. There are two transmission mechanisms, one on the left and one on the right. The left and right transmission mechanisms are respectively connected to the left and right smoke guide plates. The left and right transmission mechanisms are respectively matched with the corresponding adjustment mechanisms. The control method further includes: Based on the oil fume concentration, determine the first target smoke guide plate that needs to be opened and the second target smoke guide plate that does not need to be opened from the left smoke guide plate and the right smoke guide plate; Control the adjustment mechanism to disengage the first transmission part and the second transmission part in the transmission mechanism corresponding to the second target smoke plate, and to connect the first transmission part and the second transmission part in the transmission mechanism corresponding to the first target smoke plate.

7. The control method for a range hood as described in claim 5, characterized in that, The smoke guide plate that needs to be opened is the target smoke guide plate, and the control mechanism for the adjustment includes: After the drive mechanism has been running for a set time, the adjustment mechanism is controlled to connect the first transmission part and the second transmission part in the transmission mechanism corresponding to the target smoke guide plate; or... While the drive mechanism is running, the adjustment mechanism is controlled to make the first transmission part and the second transmission part in the transmission mechanism corresponding to the target smoke guide plate drive each other.

Images