A range hood

Abstract

The present invention discloses a range hood, comprising a fixed box, a first air inlet body and a second air inlet body, the first air inlet body comprising an air inlet, and the second air inlet body can be lifted and lowered relative to the fixed box, the first air inlet body penetrates into the second air inlet body from bottom to top and can be lifted and lowered relative to the second air inlet body, the range hood also comprises a movement mechanism, the movement mechanism comprises a linear drive module that drives the first air inlet body to be lifted and lowered, and a reversing component for causing the first air inlet body and the second air inlet body to be lifted and lowered in sections; the reversing component comprises a base fixed to the fixed box, a first sliding block fixed to the first air inlet body, and a roller, the roller and the second air inlet body can move relative to each other in the left and right directions and can be lifted and lowered synchronously, a first sliding slot is provided on the base, a second sliding slot is provided on the first sliding block, the first sliding slot comprises a vertical section and a horizontal section extending in the left and right directions, the horizontal section is connected to and communicated with the vertical section, the second sliding slot is an inclined slot inclined to the horizontal section, and the roller passes through the first sliding slot and the second sliding slot.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a range hood. Background Art

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate based on the principles of fluid dynamics, using a centrifugal fan installed inside the hood to draw in and exhaust cooking fumes, while a filter removes some grease particles. A centrifugal fan consists of a volute, an impeller mounted within the volute, and a motor that drives the impeller. As the impeller rotates, negative pressure is generated at the fan's center, drawing cooking fumes from beneath the hood into the fan. After being accelerated by the fan, the volute collects them and guides them out of the room.

[0003] Different cooking environments exist. For example, a wok is about 120mm above the countertop, while a steamer is about 320mm above the countertop. Therefore, multiple settings are needed to control the air inlet height to accommodate different cooking environments. To maintain the aesthetics of the product, the air inlet needs to be retracted and hidden when the appliance is turned off.

[0004] To this end, there are now range hoods with liftable air inlet bodies. For example, Chinese patent application number 201811096500.4 discloses a liftable double-suction range hood, which includes a cabinet, a main air driving mechanism, a main suction mechanism, a lifting mechanism, an auxiliary suction mechanism, a main smoke removal mechanism and an auxiliary smoke removal mechanism. The main suction mechanism includes a smoke-inhaling shell with a smoke-inhaling port, and the smoke-inhaling shell is provided with a filter plate obliquely arranged at the smoke-inhaling port. The lifting mechanism includes a pair of lifting components for driving the smoke-inhaling shell to move up and down and a driving member for driving the lifting component to move. The lifting component is positioned and installed on the lifting shell, and the smoke-inhaling shell is provided with reinforcing ribs corresponding to the lifting component.

[0005] The above-mentioned existing range hoods can achieve side suction (back suction). In order to ensure a good oil smoke suction effect, the range hood generally needs to be equipped with a smoke shield to prevent the oil smoke from escaping upward. Tests have found that in order to prevent the oil smoke from spreading outward and escaping from the coverage area of ​​the smoke shield, the suction force provided by the rear air inlet needs to have a large horizontal component to achieve the effect of pulling the oil smoke inward, so the height of the air inlet needs to be lower than the smoke shield. For the existing range hoods mentioned above, a simple integrated lifting (air inlet body and smoke shield) is difficult to achieve concealment in the off state. In the off state, the air inlet body is partially located below the smoke shield (the smoke shield prevents it from entering the fan frame), or a motion mechanism is required to close the smoke shield and hide it in the fan frame together with the air inlet body.

[0006] To this end, the present applicant disclosed a range hood with a two-stage lifting of an air inlet and a smoke shield, application number 202010123977.8. The range hood comprises a fan frame and a first air inlet body that can be lifted and lowered relative to the fan frame, the first air inlet body comprising a first box body and a first air inlet opened on the front side of the first box body, the range hood also comprising a second air inlet body that can be lifted and lowered relative to the fan frame, the second air inlet body comprising a second box body and a smoke shield arranged on the front side of the second box body, the first air inlet body being inserted into the second air inlet body, and the first air inlet body and the second air inlet body being both connected to the fan frame; when the range hood is in a non-working state, the first air inlet body is retracted into the second air inlet body, and the smoke shield is tightly attached to the bottom of the fan frame; when the range hood is in a working state, the height of the smoke shield is lower than the height of the smoke shield in the non-working state, and the first air inlet body extends downwardly out of the second air inlet body so that the first air inlet is lower than the smoke shield.

[0007] In the process of controlling the height of the range hood, the air inlet area of ​​the above-mentioned range hood is also affected. The air inlet area reaches its maximum only when the range hood moves to the lowest position. As the range hood rises, the air inlet area gradually decreases, and the higher the range hood goes, the worse the oil fume extraction effect becomes. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a range hood in view of the deficiencies in the above-mentioned prior art, so that the air inlet area of ​​the liftable first air inlet body does not change with the lifting height of the second air inlet body, thereby improving the oil fume extraction effect.

[0009] The technical solution adopted by the present invention to solve the above technical problems is: a range hood comprising a fixed housing, a first air inlet body and a second air inlet body, wherein the first air inlet body comprises an air inlet, the second air inlet body can be raised and lowered relative to the fixed housing, the first air inlet body penetrates the second air inlet body from bottom to top and can be raised and lowered relative to the second air inlet body, and is characterized in that:

[0010] The range hood further comprises a motion mechanism, which comprises a linear drive module for driving the first air inlet body to rise and fall, and a reversing assembly for causing the first air inlet body and the second air inlet body to rise and fall in sections;

[0011] The reversing assembly includes a base fixed to a fixed box, a first slider fixed to the first air inlet body, and a roller, the roller and the second air inlet body can move relative to each other in the left and right directions and can be raised and lowered synchronously, the base is provided with a first slide groove, the first slider is provided with a second slide groove, the first slide groove includes a vertical section and a horizontal section extending in the left and right directions, the horizontal section is connected and communicated with the vertical section, the second slide groove is an inclined groove inclined to the horizontal section, and the roller passes through the first slide groove and the second slide groove to connect the two slide grooves.

[0012] According to one aspect of the present invention, the reversing assembly is a modular assembly, which is convenient for design and disassembly. The reversing assembly also includes a second slider fixed to the second air inlet body, and the second slider is provided with a third slide groove extending in the left and right directions. The roller also passes through the third slide groove, so that the roller and the second slider can move relative to each other in the left and right directions and can be raised and lowered synchronously.

[0013] According to another aspect of the present invention, the roller is a hollow structure, and the reversing assembly also includes a synchronization shaft and a guide mechanism. The synchronization shaft is slidingly connected to the second air inlet body through the guide mechanism, so that the synchronization shaft can slide in the left and right directions relative to the second air inlet body. The synchronization shaft passes through the roller and moves synchronously with the roller in the horizontal and vertical directions.

[0014] In order to reduce the resistance when the roller slides, the roller can rotate around its own axis relative to the synchronization shaft.

[0015] Preferably, in order to ensure smooth lifting, the length of the projection of the second chute in the horizontal direction is the same as the length of the horizontal section.

[0016] Preferably, to facilitate the connection between the first slider and the first air inlet body, the first slider is connected to the first air inlet body via a connecting plate.

[0017] Preferably, in order to improve the smoke-collecting effect at the air inlet, the first air inlet body includes a first box body, and the air inlet is opened at the lower front part of the first box body. The second air inlet body includes a second box body, and the bottom of the second box body extends forward to form a smoke baffle. The first box body is inserted into the bottom of the second box body and can be raised and lowered relative to the second box body. The second box body is arranged outside the fixed box body and can be raised and lowered relative to the fixed box body.

[0018] Preferably, in order to reduce the lifting resistance of the second air inlet body and make the second air inlet body rise and fall smoothly, a roller is further provided on the rear side of the second box body. The roller can be supported on the wall surface on which the range hood is installed, and the rotation axis of the roller extends in the left and right directions.

[0019] Preferably, in order to ensure smooth lifting, the first sliding block is slidably connected to the base and can move up and down relative to the base.

[0020] Compared with the existing technology, the advantages of the present invention are: it can realize multi-stage adjustment of the position of the first air inlet body with an air inlet to adapt to different cooking conditions; the air inlet area of ​​the first air inlet body remains unchanged when the second air inlet body is raised or lowered, which is convenient for control, and at the same time obtains a better oil fume absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the range hood in a fully opened state according to the first embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the back of the range hood according to the first embodiment of the present invention in a fully opened state with the fan frame and connecting pipes hidden;

[0023] Figure 3 for Figure 2 A schematic diagram of the second air inlet body of the hidden part of the range hood;

[0024] Figure 4 for Figure 3 A schematic diagram of a partial reversing component of a range hood;

[0025] Figure 5 for Figure 4 Schematic diagram of the exploded structure of the reversing component;

[0026] Figure 6 is a partial schematic diagram of a range hood according to a first embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of a range hood in a first embodiment of the present invention with the first air inlet body opened;

[0028] Figure 8 for Figure 7 A cross-sectional view of the range hood's hidden fan frame and connecting ducts;

[0029] Figure 9 for Figure 8 A schematic diagram of a partial reversing component of a range hood;

[0030] Figure 10 for Figure 9 Schematic diagram of the exploded structure of the reversing component;

[0031] Figure 11 This is a schematic diagram of the range hood in a fully closed state according to the first embodiment of the present invention;

[0032] Figure 12 for Figure 11 A cross-sectional view of the range hood's hidden fan frame and connecting ducts;

[0033] Figure 13 for Figure 12 A schematic diagram of a partial reversing component of a range hood;

[0034] Figure 14 for Figure 13 Schematic diagram of the exploded structure of the reversing component;

[0035] Figure 15 This is a schematic diagram of the back of the range hood according to the second embodiment of the present invention, in a fully open state, with the fan frame, connecting ducts and part of the second air inlet body hidden;

[0036] Figure 16 for Figure 15 A schematic diagram of a reversing assembly of a range hood;

[0037] Figure 17 for Figure 16 Schematic diagram of the exploded structure of the reversing component;

[0038] Figure 18 A schematic diagram of a reversing assembly of a range hood according to a second embodiment of the present invention when the first air inlet body is in an open state;

[0039] Figure 19 for Figure 18 A schematic diagram of the reversing component hiding the second slider;

[0040] Figure 20 is a schematic diagram of the reversing assembly of the range hood in a fully closed state according to a second embodiment of the present invention;

[0041] Figure 21 for Figure 20 Schematic diagram of the reversing assembly hiding the second slider. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0044] Example 1

[0045] See also Figures 1 to 6A range hood includes a fixed housing 1, a first air inlet 2, a second air inlet 3, a connecting pipe 4, and a power unit 5. The power unit 5 is intended to be installed in a kitchen ceiling. The connecting pipe 4 is preferably a hose. The fixed housing 1 is used to house functional modules, such as a filter assembly and a noise reduction assembly. Alternatively, other range hood configurations may be employed, such as omitting the connecting pipe 4 and installing the fan system (not shown) of the power unit 5 within the fixed housing 1, thereby allowing the fixed housing 1 to function as a fan rack.

[0046] The first air inlet body 2 can be raised and lowered relative to the second air inlet body 3, and the second air inlet body 3 can be raised and lowered relative to the fixed housing 1. The first air inlet body 2 and the second air inlet body 3 are slidably connected by a first guide mechanism 21 and guided during raising and lowering, while the second air inlet body 3 and the fixed housing 1 are slidably connected by a second guide mechanism 31 and guided during raising and lowering.

[0047] The first air inlet 2 includes a first housing 22, with an air inlet 23 defined on the front side. The air inlet 23 extends leftward and rightward, is preferably rectangular, and is located at the bottom of the first housing 22. The second air inlet 3 includes a second housing 32, with an open bottom. The second housing 32 is sleeved onto the outside of the first housing 22, allowing the first air inlet 2 to enter upward while concealed and extending downward. A smoke shield 33 is provided on the bottom front side of the second housing 32, extending forward from the second housing 32, preferably in a horizontal orientation. The second housing 32 is sleeved onto the outside of the fixed housing 1.

[0048] When the range hood is turned on, the first air inlet 2 moves downward first. Once the first air inlet 2 is fully opened, the second air inlet 3 moves downward, achieving a two-stage lifting function. That is, in the present invention, the first and second air inlet 2 and 3 are controlled in stages. The second air inlet 3 can only move after the first air inlet 2 has moved into position. The first and second air inlet 2 and 3 are constantly subject to gravity. Before the first air inlet is fully opened, the second air inlet 3 cannot move, and at this time, a force must be applied to overcome the gravity of the second air inlet 3.

[0049] For this purpose, the range hood also includes a motion mechanism, see Figure 3 and Figure 8The motion mechanism includes a drive mechanism 61, a transmission mechanism 62 and a reversing assembly 63. The drive mechanism 61 and the transmission mechanism 62 constitute a linear drive module. The drive mechanism 61 is preferably a motor. The drive mechanism 61 is a motor. The transmission mechanism 62 includes a screw rod 621 and a transmission rod 622. The drive mechanism 61 is used to drive the screw rod 621 to rotate around its own axis. The transmission rod 622 is threadedly connected to the screw rod 621, so that it can move up and down. The transmission rod 622 can be directly connected to the screw rod 621, or a nut can be provided to connect it to the screw rod 621. The lower end of the transmission rod 622 can be connected to the first box body 22 of the first air inlet body 2, so that when the drive mechanism 61 is running, the first air inlet body 2 can be driven to rise and fall. Alternatively, the linear drive module can also adopt other existing structures, such as a combination of an electric push rod, a motor gear rack, etc.

[0050] See also Figures 3 to 6 The reversing assembly 63 is disposed within the fixed housing 1, the first air inlet 2, and the third air inlet 3, and includes a base 631, a first slider 632, and a roller 633. The base 631 is fixed to the fixed housing 1 and is immovably secured thereto. A first chute 634 is defined thereon, and a second chute 635 is defined thereon. The first chute 634 is in an inverted L-shape, comprising a vertical section 6341 (extending vertically) and a horizontal section 6342 (extending horizontally in the left-right direction). The horizontal section 6342 is connected to and communicates with the upper end of the vertical section 6341. The second chute 635 is an oblique slot that is inclined relative to the horizontal section 6342. The length of the vertical section 6341 (the dimension in the vertical direction) determines the travel of the second air inlet body 3. The length of the projection of the second chute 635 in the horizontal direction is the same as the length of the horizontal section 6342 (the dimension in the left-right direction). Preferably, the projections of both ends of the second chute 635 in the horizontal direction coincide with the two ends of the horizontal section 6342. The length of the projection of the second chute 635 on the vertical plane determines the travel of the first air inlet body 2. The roller 633 passes through the first chute 634 and the second chute 635, connecting the two chute and always moving in the overlapping part of the two chute. During the downward movement of the first slider 632, the trajectory of the roller 633 in the first chute 634 of the base 634 is to move horizontally first and then vertically.

[0051] The roller 633 is hollow, and the reversing assembly 63 also includes a synchronization shaft 636. The synchronization shaft 636 passes through the roller 633 and moves synchronously with the roller 633 in the horizontal and vertical directions. The roller 633 can rotate relative to the synchronization shaft 636 about its own axis (the axis extending in the front-to-back direction), thereby reducing friction when sliding within each chute. The motion mechanism also includes a guide mechanism 637, which includes a first guide rail 6371 and a second guide rail 6372 that are slidably connected to each other. The first guide rail 6371 is fixed to the second housing 32 via a mounting plate 638 fixed within the second housing 32. The synchronization shaft 636 is mounted on the second guide rail 6372 and can slide horizontally (left-right) relative to the first guide rail 6371. Thus, the guide mechanism 637 limits the horizontal movement of the synchronization shaft 636 relative to the second housing 32, i.e., horizontal movement is unrestricted. However, when the synchronization shaft 636 moves vertically, it drives the second housing 32 to move synchronously. Alternatively, the first guide rail 6371 may also be directly fixed to the second box body 32 .

[0052] The first slider 632 is slidably connected to the base 631 , and the first slider 632 is connected to the first box body 22 via the connecting plate 639 , so that the first air inlet body 2 synchronizes the movement of the first slider 632 in the vertical direction.

[0053] In order to reduce the friction between the second air inlet body 3 and the wall surface on which the range hood is installed when it is raised or lowered, a roller 34 is further provided on the rear side of the second box body 32. The roller 34 can be supported on the wall surface, and the rotation axis of the roller 34 extends in the left and right direction.

[0054] When the range hood is off, see Figures 11 to 14 At this time, the first air inlet body 2 is stored in the second air inlet body 3 to be hidden, and the second air inlet body 3 is at the top position relative to the fixed box body 1. At the same time, the roller 633 is located at the lower end of the second slide groove 635, and is also located at the end of the horizontal section 6342 of the first slide groove 634 away from the vertical section 6341.

[0055] When starting up, see Figures 7 to 10 The drive mechanism 61 drives the first air inlet body 2 downward. Before the first air inlet body 2 is in place, the roller 633 gradually moves within the horizontal section 6342 toward the end connected to the vertical section 6341. During this movement, the weight of the second air inlet body 3 acting on the roller 633 is overcome by the horizontal section 6342 of the first chute 634 on the base 631. Since the roller 633 is free to move horizontally relative to the second air inlet body 3, during this period of movement, the weight of the second air inlet body 3 is overcome by the fixed housing 1, and there is no vertical movement. Simultaneously, the first slider 632 moves downward with the first air inlet body 2, and the roller 633 gradually reaches the upper end of the second chute 634 within the second chute 634.

[0056] After the first air inlet body 2 is fully opened relative to the second air inlet body 3, the smoke shield 33 of the second air inlet body 3 is located at the upper edge of the air inlet 23 of the first air inlet body 2. At this time, the roller 633 reaches the transition position between the horizontal section 6342 and the vertical section 6341 of the first chute 634, and the position of the roller 633 in the second chute 634 reaches the upper end of the second chute 634. After that, continue driving, see Figure 1 、 Figure 3 and Figure 4 The roller 633 moves along the vertical section 6341 of the first chute 634. The weight of the second air inlet body 3 acting on the roller 633 is overcome by the oblique second chute 635 on the first slider 632. The vertical movement of the roller 633 controls the vertical movement of the second air inlet body 3. The first and second air inlet bodies 2 and 3 descend synchronously, and the relative positions of the smoke shield 33 and the air inlet 23 remain unchanged. When the second air inlet body 3 descends into place, the roller 633 reaches the lower end of the vertical section 6341 of the first chute 634.

[0057] The same applies when the range hood is turned off, achieving two-level lifting control.

[0058] In this way, multi-stage adjustment of the position of the first air inlet body 2 is achieved to adapt to different cooking conditions, and the first air inlet body 2 can be hidden when the machine is turned off, thereby improving the refinement of the product. During the descent process, the second air inlet body 3 moves downward only after the air inlet 23 on the first air inlet body 2 is fully opened. Thereafter, no matter where the second air inlet body 3 moves downward, the air inlet 23 is in a fully open state. Since the opening state of the air inlet 23 affects the air intake area, it affects the air volume, and ultimately affects the oil fume extraction effect. Controlling the height of the range hood is only to adapt to the user's usage conditions (high pot, low pot), so it is only hoped that the oil fume extraction effect in the control process is only related to the variable of height. This control can be achieved through the solution of the present invention.

[0059] Example 2

[0060] See also Figures 15 to 17 This embodiment differs from the first embodiment in that the reversing assembly further includes a second slider 640, which is slidably connected to the base 631, enabling vertical movement. The first slider 632 serves as the driving slider, while the second slider 640 serves as the driven slider. The second slider 640 is provided with a third sliding groove 641 extending horizontally in the left-right direction. The second slider 640 is fixed to the second air inlet body 3, replacing the synchronizing shaft 636 and guide mechanism 637 of the first embodiment.

[0061] The roller 633 also passes through the third sliding groove 641, so that the roller 633 and the second slider 640 can slide relative to each other in the horizontal direction. The horizontal movement of the roller 633 will not drive the second slider 640. When the roller 633 moves in the vertical direction, it controls the second slider 640 to move in the vertical direction.

[0062] In summary, the function of the second slider 640 is similar to the combination of the synchronization shaft 636 and the guide mechanism 637 in the first embodiment. As the first slider 632 moves downward, the second slider 640 remains stationary for a period of time. Only when the roller 633 moves in a vertical direction does the second slider 640 move downward along with the first slider 632.

[0063] The different states of the first air inlet body 2 and the second air inlet body 3 during the movement of the range hood are the same as those in the first embodiment, so the movement of the reversing assembly 63 is mainly described below.

[0064] When the range hood is off, see Figure 20 and Figure 21 At this time, the roller 633 is located at the lower end of the second slide groove 635, the end of the horizontal section 6342 of the first slide groove 634 away from the vertical section 6341, and the right end of the third slide groove 641.

[0065] When the machine is turned on, the driving mechanism 61 drives the first air inlet body 2 to move downward. Before the first air inlet body 2 is in place, see Figure 18 and Figure 19 The roller 633 gradually moves along the horizontal section 6342 toward the end connected to the vertical section 6341. During this movement, the gravity of the second air inlet body 3 on the roller 633 is overcome by the horizontal section 6342 of the first chute 634 on the base 631. The roller 633 is free to move horizontally relative to the second air inlet body 3 and the second slider 640, and the roller 633 gradually moves toward the left end of the third chute 641. At the same time, the first slider 632 moves downward with the first air inlet body 2, and the position of the roller 633 in the second chute 634 gradually reaches the upper end of the second chute 634.

[0066] After the first air inlet 3 is fully opened, the roller 633 reaches the transition position between the horizontal section 6342 and the vertical section 6341 of the first chute 634, and the position of the roller 633 in the second chute 634 reaches the upper end of the second chute 634. Figures 15 to 17The roller 633 moves along the vertical section 6341 of the first chute 634. The gravity of the second air inlet body 3 acting on the roller 633 is overcome by the oblique second chute 635 on the first slider 632. The vertical movement of the roller 633 controls the vertical movement of the second air inlet body 3 via the second slider 640. When the second air inlet body 3 is lowered into place, the roller 633 reaches the lower end of the vertical section 6341 of the first chute 634.

[0067] The same applies when the range hood is turned off, achieving two-level lifting control.

[0068] In this embodiment, the second slider 640 is used to realize a modular design of the reversing assembly 63, which is convenient for assembly and disassembly, and can isolate the reversing assembly 63 from the oil circuit, thereby improving the stability of the mechanism.

Claims

1. A range hood, comprising a fixed housing (1), a first air inlet body (2) and a second air inlet body (3), wherein the first air inlet body (2) comprises an air inlet port (23), the second air inlet body (3) can be raised and lowered relative to the fixed housing (1), the first air inlet body (2) penetrates the second air inlet body (3) from bottom to top and can be raised and lowered relative to the second air inlet body (3), characterized in that: The range hood further comprises a motion mechanism, wherein the motion mechanism comprises a linear drive module for driving the first air inlet body (2) to rise and fall, and a reversing assembly (63) for causing the first air inlet body (2) and the second air inlet body (3) to rise and fall in sections; The reversing assembly (63) comprises a base (631) fixed to the fixed box (1), a first slider (632) fixed to the first air inlet body (2), and a roller (633); the roller (633) and the second air inlet body (3) can move relative to each other in the left and right directions and can be raised and lowered synchronously; a first slide groove (634) is provided on the base (631); a second slide groove (635) is provided on the first slider (632); the first slide groove (634) comprises a vertical section (6341) and a horizontal section (6342) extending in the left and right directions; the horizontal section (6342) is connected and communicated with the vertical section (6341); the second slide groove (635) is an inclined groove inclined with the horizontal section (6342); the roller (633) passes through the first slide groove (634) and the second slide groove (635) to connect the two slide grooves.

2. The range hood according to claim 1, characterized in that: The reversing assembly (63) further comprises a second sliding block (640) fixed to the second air inlet body (3); the second sliding block (640) is provided with a third sliding groove (641) extending in the left-right direction; the roller (633) also passes through the third sliding groove (641), so that the roller (633) and the second sliding block (640) can move relative to each other in the left-right direction and can be raised and lowered synchronously.

3. The range hood according to claim 1, characterized in that: The roller (633) is a hollow structure. The reversing assembly (63) further comprises a synchronization shaft (636) and a guide mechanism (637). The synchronization shaft (636) is slidably connected to the second air inlet body (3) via the guide mechanism (637), so that the synchronization shaft (636) can slide in the left and right directions relative to the second air inlet body (3). The synchronization shaft (636) passes through the roller (633) and moves synchronously with the roller (633) in the horizontal and vertical directions.

4. The range hood according to claim 3, characterized in that: The roller (633) can rotate around its own axis relative to the synchronization shaft (636).

5. The range hood according to any one of claims 1 to 4, characterized in that: The length of the projection of the second slide groove (635) in the horizontal direction is the same as the length of the horizontal section (6342).

6. The range hood according to any one of claims 1 to 4, characterized in that: The first sliding block (632) is connected to the first air inlet body (2) via a connecting plate (639).

7. The range hood according to any one of claims 1 to 4, characterized in that: The first air inlet body (2) comprises a first box body (22), the air inlet (23) is arranged at the front lower part of the first box body (22), the second air inlet body (3) comprises a second box body (32), the bottom of the second box body (32) extends forward to form a smoke baffle (33), the first box body (22) is inserted through the bottom of the second box body (32) and can be raised and lowered relative to the second box body (32), and the second box body (32) is arranged outside the fixed box body (1) and can be raised and lowered relative to the fixed box body (1).

8. The range hood according to claim 7, characterized in that: A roller (34) is also provided on the rear side of the second box body (32), and the roller (34) can be supported on the wall surface on which the range hood is installed, and the rotation axis of the roller (34) extends in the left-right direction.

9. The range hood according to any one of claims 1 to 3, characterized in that: The first sliding block (632) is slidably connected to the base (631) and can move up and down relative to the base (631).

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