Range hood

Abstract

This invention relates to a range hood, comprising: an air inlet housing with an air inlet panel at its front, the air inlet panel having an air inlet; the air inlet housing includes: an outer housing with a first opening at its front and a second opening at its bottom; a sliding housing slidably disposed within the outer housing in a front-rear direction; and a lifting housing slidably constrained on the outer housing in a manner that allows it to move up and down relative to the outer housing; the top of the air inlet panel is rotatably connected to the top edge of the first opening of the sliding housing about a left-right extending axis, and the bottom of the air inlet panel is rotatably connected to the bottom edge of the third opening of the lifting housing about a left-right extending axis; the air inlet panel can switch between a first state (tilting backward from top to bottom) and a second state (extending vertically), realizing adaptive adjustment of the range hood's shape.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and in particular to a range hood with a variable form factor. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. The most common and widely used type is the top-mounted range hood. Top-mounted range hoods mainly include overhead range hoods and side-mounted range hoods. Overhead range hoods are more aesthetically pleasing, but their smoke inlet is high, limiting their smoke extraction efficiency. Compared to overhead range hoods, side-mounted range hoods have lower smoke inlets; however, due to their external shape and internal duct structure, current side-mounted range hoods cannot get as close to the cooking fumes as possible, significantly limiting their extraction efficiency. To get closer to the source of cooking fumes, a side-mounted range hood with a vertical smoke inlet duct has emerged, as illustrated in Chinese utility model patent number CN216844810U. This type of range hood can quickly remove the oil fumes it produces. Because the air intake duct is relatively thin, the cooking space at the front is larger, which is also conducive to steaming in tall pots (such as multi-layer tall pots used for steaming buns).

[0003] However, this type of thin, side-draft range hood also has certain limitations. While its vertical duct design provides more space for cooking pots during steaming and boiling, the shallow depth of its smoke collection hood results in a limited negative pressure zone at the bottom and insufficient smoke collection capacity. In cooking scenarios with large volumes of rapidly spreading fumes, such as stir-frying, the fumes easily escape from the edges of the negative pressure zone, affecting the extraction efficiency. Furthermore, the low position of the lower edge of the smoke collection hood directly hinders the user's space for tossing the pot, posing inconvenience and safety hazards. Currently, range hoods have a fixed structure and cannot adaptively switch between "thin side-draft" and "deep cavity smoke collection" forms to meet the actual needs of different cooking methods such as steaming and stir-frying. Therefore, it is difficult to simultaneously meet multiple requirements such as accommodating tall pots, efficient smoke collection, and sufficient space for tossing the pot.

[0004] Therefore, existing range hoods still need further improvement. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a range hood with a variable form, in order to solve the problem that the existing range hoods cannot adaptively switch forms according to the cooking method, resulting in a mismatch between smoke collection effect and operating space.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problem is as follows: a range hood, comprising: an air inlet box having an air inlet panel at its front, the air inlet panel having an air inlet; the air inlet box comprising: an outer box having a first opening at its front and a second opening at its bottom; a sliding box slidably disposed within the outer box in a front-rear direction and capable of entering and exiting the first opening of the outer box, the bottom of the sliding box having a first opening sloping downwards from front to back; a lifting box slidably constrained to the outer box in a manner that allows it to move up and down relative to the outer box and capable of entering and exiting the second opening of the outer box, the front of the lifting box having a third opening; the top of the air inlet panel is rotatably connected to the top edge of the first opening of the sliding box about a left-right extending axis, and the bottom of the air inlet panel... The air inlet panel is rotatably connected to the bottom edge of the third opening of the lifting box body around the left-right extending axis; the air inlet panel has at least a first state and a second state as the translation box body moves forward and backward: in the first state, the translation box body moves forward relative to the outer box body and is exposed forward through the first opening, the lifting box body moves upward relative to the outer box body, and the air inlet panel covers the first opening at the front of the translation box body, that is, the air inlet panel body is also tilted backward from top to bottom; in the second state, the translation box body moves backward relative to the outer box body and is housed in the outer box body, the lifting box body moves downward relative to the outer box body, the air inlet panel is located on the front side of the translation box body and is arranged vertically as a whole, and covers the third opening at the front of the lifting box body.

[0007] By connecting the sliding front and rear movement of the duct body, the vertical movement of the lifting duct body, and the rotation of the air intake panel, the range hood achieves flexible transformation. In its first state, it forms a powerful, backward-tilted suction surface suitable for efficient smoke extraction, ideal for stir-frying and other high-heat cooking scenarios. In its second state, the entire unit retracts and the panel stands vertically, saving kitchen space and making it suitable for everyday use. The air intake panel is linked to both duct bodies, automatically adjusting its angle during state transitions without manual disassembly, greatly improving the accessibility and convenience of internal cleaning. Its compact structure integrates extension, lifting, and rotation functions through a multi-directional motion mechanism, optimizing space utilization and expanding usage scenarios.

[0008] In the retracted state, if there is misalignment or gaps between the air inlet panel and the front wall panel of the sliding housing, it not only affects the aesthetics but also creates unsanitary corners for oil accumulation. As an improvement, the sliding housing includes a vertically extending front wall panel at the front. In the second state, the front wall panel of the sliding housing and the air inlet panel are vertically flush to form the front wall of the air inlet housing. In the second state, the front wall panel of the sliding housing and the air inlet panel are vertically flush to form a continuous and uniform front wall of the air inlet housing, resulting in a clean appearance and no gaps for oil accumulation. This enhances the overall structural sealing and rigidity, reducing the possibility of oil fumes leaking from gaps.

[0009] The aforementioned "flat connection" can be understood as the surfaces of two adjacent components being on the same plane or continuous curved surface, without obvious height differences or gaps, forming a visually and structurally coherent whole.

[0010] Touch control panels are typically fixed to the front of the range hood, requiring separate protection during cleaning and being difficult to coordinate with changes in the range hood's shape. As an improvement, a touch display panel is installed on the front side of the front wall panel of the sliding housing. Integrating the touch display panel into the front wall panel of the sliding housing allows it to move back and forth with the housing, remaining in an easily operable position even in the second state, thus improving the convenience of human-machine interaction.

[0011] Considering that the absence of a stable airflow channel between the translating housing and the outer casing during movement could lead to turbulent airflow, reduced suction, or increased noise, the translating housing is improved by including a vertically extending rear wall panel at the rear. In both the first and second states, the rear wall panel of the translating housing defines a vertically extending air intake channel between itself and the corresponding side wall of the outer casing. Regardless of whether the translating housing is in the first or second state, a vertically extending air intake channel is always formed between its rear wall panel and the side wall of the outer casing, ensuring the continuity and stability of the airflow path.

[0012] If the air inlet channel is merely a gap between the sliding housing and the outer housing, the airflow adjustment capability is limited, and it is difficult to effectively extract and exhaust cooking fumes. As an improvement, a ventilation opening connected to the air inlet channel is provided on the rear wall panel of the sliding housing. By creating a ventilation opening on the rear wall panel of the sliding housing, the air inlet channel is connected to the interior of the housing, increasing the air intake area and path controllability. The position and size of the ventilation opening can be optimized as needed to achieve directional airflow guidance and further improve the fume extraction effect.

[0013] If the internal airflow guiding structure cannot be adjusted synchronously during the transformation of the range hood's form, airflow interruption can easily occur, especially at the corners of the housing where swirling airflow can easily form. As an improvement, this includes a fan frame located above the air inlet housing and a guide plate assembly located within the air inlet housing. The top rear side of the outer housing also has a mounting port connected to the fan frame. The guide plate assembly includes: a first partition, located on the inner wall of the air inlet panel, extending in the left-right direction and inclined upwards and backwards from the air inlet panel; and a second partition, located within the sliding housing and extending in the left-right direction, inclined downwards and forwards from the rear wall of the sliding housing and extending to the first... An open opening; an air-guiding plate, located within the air inlet channel, with its front side rotatably connected to the rear side of the second partition through the vent; a crank, its rear end rotatably connected to the rear wall of the outer casing or the rear wall of the fan frame, and its front end rotatably connected to the rear side of the air-guiding plate; in the first state, the front side of the second partition is connected to the inner side of the air inlet panel, the first partition is located above and in front of the second partition, and the rear side of the air-guiding plate extends to the front edge of the mounting opening; in the second state, the rear side of the first partition is connected to the front side of the second partition, and the two are arranged parallel to form a complete plate, with the air-guiding plate abutting against the front side of the air inlet channel. Through the linkage design of the first partition, the second partition, the air-guiding plate, and the crank, a continuous guide surface inclined upwards and backwards from the air inlet panel is formed in the first state, guiding the fumes quickly into the fan; in the second state, the first partition and the second partition are assembled into a complete plate, maintaining the air duct's sealing. The air intake plate automatically adjusts its angle as the housing moves, ensuring a smooth connection between the air inlet duct and the fan inlet and avoiding dead air zones. The overall airflow guiding structure is highly adaptable, ensuring efficient oil fume collection and separation capabilities in both states.

[0014] To avoid jamming, swaying, or positional misalignment during the relative movement of the translating and lifting housings, which could affect operational reliability and sealing performance, an improvement is made: the translating housing is connected to the outer housing via a first linear guide assembly extending forward and backward, and the lifting housing is connected to the outer housing via a second linear guide assembly extending vertically. The use of the first linear guide assembly (forward and backward) and the second linear guide assembly (vertical) provides stable, low-resistance linear guidance for the housing movement. This ensures movement accuracy and repeatability, extends the mechanism's lifespan, and reduces the failure rate.

[0015] As an improvement, a drive mechanism is also included to move the translation box back and forth relative to the outer box. The drive mechanism (such as a mechanism involving a motor, lead screw, gear rack, etc.) enables automatic back and forth movement of the translation box, improving operational convenience and intelligence. The drive mechanism can also be linked with the control system to achieve one-button switching of operating modes and precise positioning to the first or second state.

[0016] As an improvement, the air inlet panel is provided with multiple mesh or annular air inlets, each of which constitutes an air inlet. The dispersed arrangement of multiple mesh or annular air inlets increases the effective air intake area, balances negative pressure distribution, and improves the coverage of oil fume extraction. The mesh or annular structure helps to intercept oil droplets through collision, improving oil fume separation efficiency, and is also easy to disassemble and clean.

[0017] Traditional oil cups are fixed to the bottom of the range hood, requiring separate removal for cleaning and prone to spillage due to their low position. The new model features an oil cup at the bottom of the lifting housing that moves up and down with it. The oil cup moves synchronously with the bottom of the lifting housing, and in its second state, it descends with the housing for easier access and cleaning. This design prevents the oil cup from being exposed in a fixed position, reducing accidental contact and maintaining a clean appearance.

[0018] Compared with existing technologies, the advantages of this invention are as follows: The air inlet box of this invention, through the linkage design of the translational box and the lifting box, allows the air inlet panel to switch between a first state (tilting backward from top to bottom) and a second state (vertical extension), achieving adaptive adjustment of the range hood's shape. In scenarios involving tall pots such as steaming and boiling, a thin side-suction shape is adopted, providing ample height space for the pots; in scenarios involving high oil fumes such as stir-frying, it switches to a deep-cavity smoke-gathering shape, expanding the negative pressure area, significantly improving the efficiency of oil fume capture, and effectively preventing oil fume escape. Simultaneously, the vertical extension shape raises the lower edge of the smoke collection hood, leaving sufficient space for tossing the pot, balancing operational safety and ease of use. This variable-shape air inlet box has an ingenious overall structure, offering multiple functions in one unit, and effectively solving the technical problem of balancing smoke gathering effect, tall pot capacity, and operating space. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a range hood according to an embodiment of the present invention, with the air inlet box in a first state;

[0020] Figure 2 This is a vertical sectional view of the range hood of the present invention, cut along the front-to-back direction, with the air inlet box in the first state;

[0021] Figure 3 This is a vertical sectional perspective view of a range hood according to an embodiment of the present invention, cut along the front-to-back direction, with the air inlet box in a first state;

[0022] Figure 4 This is a three-dimensional structural diagram of a range hood according to an embodiment of the present invention, with the air inlet box in a second state;

[0023] Figure 5 This is a vertical sectional view of the range hood of the present invention, cut along the front-to-back direction, with the air inlet box in the second state;

[0024] Figure 6 This is an exploded view of the air inlet box of the range hood according to an embodiment of the present invention;

[0025] Figure 7 This is a three-dimensional structural diagram of the translation box of the range hood according to an embodiment of the present invention;

[0026] Figure 8 This is a three-dimensional structural diagram of the air inlet plate of the range hood according to an embodiment of the present invention. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0029] Figures 1-8 A preferred embodiment of the range hood of the present invention is shown. This range hood can adapt to the needs of different cooking scenarios by changing its physical form, thereby achieving both efficient fume extraction and a spacious operating area for cookware.

[0030] The range hood mainly consists of a fan frame 3 and an air inlet box 1. The fan frame 3 is usually installed inside the kitchen ceiling or cabinet, and it houses a fan system 31, typically a centrifugal fan, responsible for generating the negative pressure required to extract cooking fumes. The air inlet box 1 is located below the fan frame 3 and is used to capture cooking fumes.

[0031] In this embodiment, the air inlet housing 1 is a multi-layered, movable composite structure, mainly composed of an outer housing 11, a sliding housing 12, a lifting housing 13, and an air inlet panel 15. The outer housing 11 serves as the fixed external frame and mounting base for the entire air inlet housing 1, such as... Figure 6As shown, the outer casing 11 has a large first opening 111 at the front and a second opening 112 at the bottom. This can also be understood as the outer casing 11 lacking a front panel and a bottom panel. An installation port 113 is provided on the rear top side of the outer casing 11 for connecting to the inlet of the upper fan frame 3, ensuring unobstructed airflow. The outer casing 11 is typically fixed to the kitchen wall using brackets or connectors.

[0032] The translation box 12 is a movable component that is slidably disposed within the outer box 11 in the front-to-back direction (i.e., perpendicular to the wall). Specifically, the left and right sides of the translation box 12 are each connected to the inner side walls of the outer box 11 via a set of front-to-back extending first linear guide rail assemblies 161, ensuring smooth and precise front-to-back movement, and can extend or retract through the first opening 111 at the front of the outer box 11. Figure 7 As shown, in this embodiment, the translation box 12 is designed as a side-mounted isosceles trapezoidal structure, meaning its cross-section perpendicular to the left and right directions is approximately an isosceles trapezoid. This design makes its front narrower and its rear wider, which is beneficial for optimizing the internal airflow structure. The bottom of the translation box 12 is not closed, but has a first opening 120 that slopes downwards from front to back. In addition, the translation box 12 also includes a vertically extending front wall panel 121 located at the front and a vertically extending rear wall panel 122 located at the rear. The vertical dimension of the front wall panel 121 is much smaller than that of the rear wall panel 122. Specifically, at least one rectangular vent 123 is provided on the rear wall panel 122 of the translation box 12. The front side of the front wall panel 121 of the translation box 12 typically integrates a touch display panel for user operation and displaying the working status. In order to drive the translation box 12 to move, this embodiment also provides a drive mechanism, such as a servo motor in conjunction with a lead screw and nut pair, or a motor-driven gear meshing with a rack fixed on the translation box 12, so as to realize its automated forward and backward movement.

[0033] The lifting box 13 is a movable component that can move up and down relative to the outer box 11. The lifting box 13 is connected to the inner side of the rear wall of the outer box 11 via two sets of vertically extending second linear guide rail assemblies 162, allowing it to rise or fall stably under the constraint of the outer box 11, and to be partially exposed or retracted through the second opening 112 at the bottom of the outer box 11. The front of the lifting box 13 has a third opening 130. To facilitate flue gas flow, the top of the lifting box 13 is also open. At the bottom of the lifting box 13, an oil collection cup 14 that moves up and down with it is also installed to facilitate the collection of condensed oil in different configurations.

[0034] In this embodiment, the air inlet panel 15 is the component on the front of the range hood that interacts with the user and forms the air intake surface. The air inlet panel 15 has multiple air inlets 150, which can be densely distributed circular mesh, square grilles, or multiple larger annular air inlets 150 (e.g., ...). Figure 8 As shown, these components together form the main fume intake channel. The top edge of the air inlet panel 15 is rotatably connected to the top edge of the first opening 120 of the translation box 12 via left-right extending pivots (e.g., hinges). Similarly, the bottom edge of the air inlet panel 15 is also rotatably connected to the bottom edge of the third opening 130 of the lifting box 13 via left-right extending pivots. This double-rotation joint connection method allows the angle of the air inlet panel 15 to automatically adjust as the relative positions of the translation box 12 and the lifting box 13 change.

[0035] In this embodiment, the sliding housing 12, the lifting housing 13, and the air inlet panel 15 of the air inlet housing 1 are linked together to achieve adaptive switching between smoke collection effect and space utilization. In the first state (e.g.) Figure 1-3 As shown, this design is suitable for scenarios involving large amounts of oil fumes, such as stir-frying. The drive mechanism pushes the translation box 12 forward relative to the outer box 11, causing most of it to protrude from the first opening 111. Simultaneously, the lifting box 13 moves upward relative to the outer box 11, typically partially or completely retracting into the outer box 11. At this time, due to the forward movement of the translation box 12 and the protrusion of the top of its first opening 120, while the lifting box 13 rises, causing the bottom of the air inlet panel 15 to move backward, the air inlet panel 15 is "pulled" into a backward tilted posture from top to bottom, effectively increasing the longitudinal depth of the negative pressure zone and forming a deep cavity smoke collection effect.

[0036] In the second state (e.g.) Figure 4-5 As shown (suitable for daily cooking, steaming, or space saving), the drive mechanism moves the sliding housing 12 backward, retracting it entirely into the outer housing 11. Simultaneously, the lifting housing 13 moves downward relative to the outer housing 11, with part of its structure extending downward from the second opening 112. At this point, the first opening 120 of the sliding housing 12 is at the rear, the air inlet panel 15 loses its backward-leaning support point, and as the lifting housing 13 descends, the bottom of the air inlet panel 15 moves downward as well. Under the combined action of both, the air inlet panel 15 transforms into an upright posture with overall vertical extension. Particularly important is that in this state, the front wall panel 121 of the sliding housing 12 is precisely flush with the air inlet panel 15 in the vertical direction, together forming a complete, continuous, and seamless front wall of the air inlet housing 1, resulting in a clean appearance and no unsanitary corners. Because the overall structure is retracted and the panel is vertical, ample space is left above the cookware (especially high-rise steamers). The position of the air inlet 150 on the air inlet panel 15 also moves down with the lifting box 13, closer to the smoke source, so that the generated smoke can be captured more promptly and escape is reduced.

[0037] To ensure efficient and smooth airflow into the fan system 31 in both configurations, a baffle assembly is provided inside the air inlet housing 1. This baffle assembly includes a first baffle 21, a second baffle 22, an air guide plate 23, and a crank 24. The first baffle 21 is fixed to the inner wall of the air inlet panel 15, located above its air inlet 150, and extends along the left and right edges of the air inlet panel 15. The first baffle 21 is inclined upwards and backwards from the connection point of the air inlet panel 15.

[0038] The second partition 22 is fixed inside the translation box 12 and extends in the same left-right direction. Its left and right ends can be connected to the left and right side walls of the translation box 12. The second partition 22 is inclined forward and downward from the rear wall plate 122 of the translation box 12 and extends all the way to its first opening 120.

[0039] An air intake plate 23 is disposed within the air inlet channel 10 between the rear wall panel 122 of the translation housing 12 and the side wall of the outer housing 11, and its left and right dimensions are basically the same as those of the vent 123. The front side of the air intake plate 23 passes through the vent 123 via left and right extending pins and is rotatably connected to the rear side of the second partition 22. The rear end of a crank 24 is rotatably connected to the rear side wall of the outer housing 11 (near the mounting port 113) via a pin, and its front end is rotatably connected to the rear side of the air intake plate 23 via a pin.

[0040] In the first state, as the translation box 12 moves forward and the air inlet panel 15 tilts backward, the front side of the second partition 22 will seal against the inner wall of the air inlet panel 15, forming a continuous guide surface that smoothly guides air upward and backward from the air inlet 150 along the air inlet panel 15, the first partition 21, and the second partition 22. At the same time, the air guide plate 23 extends forward with the translation box 12, and the rear side of the air guide plate 23 extends to the leading edge of the fan frame 3 mounting port 113, directly guiding the airflow of the air inlet channel 10 to the fan inlet, avoiding the generation of vortices in the corners.

[0041] In the second state, the translation box 12 retracts, and the air inlet panel 15 is in a vertical position. At this time, the rear side of the first partition 21 and the front side of the second partition 22 are sealed together, and the two are almost parallel, forming a nearly complete vertical air guide plate, maintaining the integrity of the air duct structure. At the same time, the air guide plate 23 is deflected and retracted backward under the pull of the crank 24, and abuts against the front side of the air inlet channel 10 (i.e., the outer side of the rear wall panel 122 of the translation box 12), maintaining smooth airflow in the channel.

[0042] Users select the operating mode (such as "stir-fry mode" or "daily / steaming mode") via the touch panel, and the drive mechanism begins to operate. When "stir-fry mode" is selected, the system controls the sliding box 12 to extend forward and the lifting box 13 to rise. The air intake panel 15 automatically changes to a backward-tilting deep cavity shape, which, together with the baffle assembly, forms a large-scale, strongly guided negative pressure zone, powerfully capturing smoke and quickly exhausting the rapidly spreading stir-fry fumes. When "daily / steaming mode" is selected or more top space is needed, the system controls the sliding box 12 to retract and the lifting box 13 to descend. The air intake panel 15 automatically changes to an upright shape, and the overall structure becomes more compact (i.e., thinner) in the front-to-back direction. This not only frees up space for tall cookware, but the position of the air inlet 150 on the air intake panel 15 also moves down with the lifting box 13, which is also conducive to capturing fumes.

[0043] The range hood in this embodiment achieves seamless switching between two forms: "deep cavity smoke collection" and "thin side suction / vertical storage" through the coordinated design of various components in the air inlet box 1. This effectively solves the multiple contradictions of traditional range hoods, such as fixed form, inability to balance efficient suction and exhaust, large pot capacity, and spacious operating space, thereby improving the product's adaptability to different scenarios and user experience.

[0044] The range hood (power on / off, airflow adjustment, and form change) in this embodiment can be controlled by a voice module. It is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the range hood to perform corresponding operations, thereby realizing intelligent control of the range hood and improving the user experience.

Claims

1. A range hood, comprising: An air inlet box (1) has an air inlet panel (15) at its front, and an air inlet (150) is provided on the air inlet panel (15); Its characteristic is that the air inlet box (1) comprises: The outer casing (11) has a first opening (111) at the front and a second opening (112) at the bottom; The translation box (12) is slidably disposed inside the outer box (11) in the front-back direction and can enter and exit the first opening (111) of the outer box (11). The bottom of the translation box (12) has a first opening (120) that slopes downward from front to back. The lifting box (13) is slidably constrained on the outer box (11) in such a way that it can move up and down relative to the outer box (11), and can enter and exit the second opening (112) of the outer box (11). The front part of the lifting box (13) has a third opening (130). The top of the air inlet panel (15) is rotatably connected to the top edge of the first opening (120) of the translation box (12) about the left and right extending axis, and the bottom of the air inlet panel (15) is rotatably connected to the bottom edge of the third opening (130) of the lifting box (13) about the left and right extending axis. The air inlet panel (15) has at least a first state and a second state as the translation box (12) moves back and forth: In the first state, the translation box (12) moves forward relative to the outer box (11) and is exposed forward through the first opening (111), the lifting box (13) moves upward relative to the outer box (11), and the air inlet panel (15) covers the first opening (120) at the front of the translation box (12), that is, the air inlet panel (15) is also tilted backward from top to bottom as a whole; In the second state, the translation box (12) moves backward relative to the outer box (11) and is housed inside the outer box (11), the lifting box (13) moves downward relative to the outer box (11), the air inlet panel (15) is located on the front side of the translation box (12) and is arranged vertically as a whole, and blocks the third opening (130) at the front of the lifting box (13).

2. The range hood according to claim 1, characterized in that: The translation box (12) includes a front wall panel (121) located at the front and extending vertically. In the second state, the front wall panel (121) of the translation box (12) and the air inlet panel (15) are flatly connected in the vertical direction to form the front wall of the air inlet box (1).

3. The range hood according to claim 2, characterized in that: A touch display panel is provided on the front side of the front wall panel (121) of the translation box (12).

4. The range hood according to claim 2, characterized in that: The translation box (12) also includes a rear wall panel (122) located at the rear and extending vertically. In the first state and the second state, the rear wall panel (122) of the translation box (12) and the corresponding side wall of the outer box (11) define a vertically extending air inlet channel (10).

5. The range hood according to claim 4, characterized in that: The rear wall panel (122) of the translation box (12) is also provided with a ventilation opening (123) that is connected to the air inlet channel.

6. The range hood according to claim 5, characterized in that: It also includes a fan frame (3) located above the air inlet box (1) and a guide plate assembly located inside the air inlet box (1). The top rear side of the outer box (11) is also provided with an installation port (113) connected to the fan frame (3). The deflector assembly includes: The first partition (21) is provided on the inner side wall of the air inlet panel (15). The first partition (21) extends in the left and right direction and is inclined backward and upward from the air inlet panel (15). The second partition (22) is located inside the translation box (12) and extends in the left and right direction. The second partition (22) is inclined forward and downward from the rear wall plate (122) of the translation box (12) and extends to the first opening (120) of the translation box (12). The air intake plate (23) is located in the air inlet channel. The front side of the air intake plate (23) passes through the vent (123) and is rotatably connected to the rear side of the second partition plate (22). The crank (24) is rotatably connected at its rear end to the rear side wall of the outer casing (11) or the rear side wall of the fan frame (3), and at its front end is rotatably connected to the rear side of the air duct (23). In the first state, the front side of the second partition (22) is connected to the inner side of the air inlet panel (15), the first partition (21) is located above the front of the second partition (22), and the rear side of the air guide plate (23) extends to the front edge of the mounting port (113). In the second state, the rear side of the first partition (21) is connected to the front side of the second partition (22), and the two are arranged in parallel to form a complete plate body, and the air guide plate (23) is attached to the front side of the air inlet channel.

7. The range hood according to any one of claims 1 to 6, characterized in that: The translation box (12) is connected to the outer box (11) via a first linear guide rail assembly (161) extending forward and backward, and the lifting box (13) is connected to the outer box (11) via a second linear guide rail assembly (162) extending vertically.

8. The range hood according to claim 7, characterized in that: It also includes a drive mechanism for moving the translation box (12) back and forth relative to the outer box (11).

9. The range hood according to any one of claims 1 to 6, characterized in that: The air inlet panel (15) is provided with a plurality of mesh holes or annular air inlet openings, and each of the mesh holes or the annular air inlet openings (150) constitutes the air inlet (150).

10. The range hood according to any one of claims 1 to 6, characterized in that: The bottom of the lifting box (13) is also provided with an oil cup (14) that can move up and down with the lifting box (13).

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