CN110594814A

CN110594814A - Fume exhaust fan

Info

Publication number: CN110594814A
Application number: CN201910837624.1A
Authority: CN
Inventors: 王磊; 申志贤; 徐鑫
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2019-12-20
Anticipated expiration: 2039-09-05
Also published as: CN110594814B

Abstract

The invention discloses a range hood, which comprises a fan frame and an air inlet body capable of lifting relative to the fan frame, wherein the air inlet body is provided with an air inlet, the air inlet body can be positioned at a first position and a second position lower than the first position, when the air inlet body is positioned at the first position, at least part of the air inlet body is positioned in the fan frame, and when the air inlet body is positioned at the second position, the air inlet is positioned below the fan frame, and the range hood is characterized in that: the air inlet body is greater than the fan frame in the ascending width of left and right sides, the fan frame includes first left side wall and first right side wall, set up the incision that the confession air inlet body that extends from top to bottom upwards passed on first left side wall and the first right side wall, the position that corresponds with the incision in the fan frame is provided with the separation blade, when the air inlet body is in the first position the separation blade is adjacent with the incision, when the air inlet body is in the second position, the separation blade seals the incision.

Description

Fume exhaust fan

Technical Field

The invention relates to an oil fume purification device, in particular to a range hood.

Background

The range hood has become one of indispensable kitchen electrical appliances in modern homes, and generally the range hood comprises a top suction type and a side suction type. The top-suction type range hood has more and more extensive application due to the advantages of neatness, lightness, small occupied space and the like; the side-draft range hood utilizes the vortex wind pressure principle to absorb most of the oil smoke close to the cooking bench in an arc form, so that the adverse effect on the health of a human body can be reduced, and the suction effect of a power source cannot be reduced basically because the power source is close to the cooking bench.

Along with the development of science and technology and the improvement of living standard, the user not only pursues range hood performance, has also had very big demand to range hood's outward appearance, and the user more and more prefers embedded range hood, and the embedded range hood that realizes through the mode of going up and down agrees with advantages such as whole cupboard, outward appearance uniformity are strong because of it can all imbed in the cupboard, and is loved by the user deeply. In the prior art, the range hood uses the liftable smoke collecting cavity, the smoke collecting cavity can be contracted into the whole machine in the shutdown state, the integral aesthetic feeling of the appearance is ensured, the pollution of the liftable smoke collecting cavity can be prevented, and the backflow preventing effect can be achieved to a certain extent. The fully-embedded range hood disclosed in the Chinese patent with the application number of 201710457645.1 comprises a main box body, wherein an air box and a side smoke collecting cover are arranged in the main box body, the side smoke collecting cover is connected with the main box body through a lifting mechanism, and a side air inlet, a smoke baffle and a side oil storage device are arranged on the side smoke collecting cover.

However, in the above-mentioned lifting range hood, when the size of the movable part (the liftable side fume collecting hood) is larger than that of the fan frame (the main box), it is difficult to lift the movable part by a large stroke, and when the size of the movable part is smaller, it is difficult to ensure the fume suction effect.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a range hood aiming at the defects in the prior art, which can realize the large-scale lifting of a wide air inlet body and ensure the sealing property in the lifting process.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a range hood, includes the fan frame and the air inlet body that can go up and down relative fan frame, the air intake has been seted up on the air inlet body, the air inlet body can be in the primary importance and the second position that is less than the primary importance, works as when the air inlet body is in the primary importance, the air inlet body at least part is located the fan frame, works as when the air inlet body is in the second position the air intake is located fan frame below, its characterized in that: the air inlet body is greater than the fan frame in the ascending width of left and right sides, the fan frame includes first left side wall and first right side wall, set up the incision that the confession air inlet body that extends from top to bottom upwards passed on first left side wall and the first right side wall, the position that corresponds with the incision in the fan frame is provided with the separation blade, when the air inlet body is in the first position the separation blade is adjacent with the incision, when the air inlet body is in the second position, the separation blade seals the incision.

In order to drive the blocking piece to act in the lifting process of the air inlet body, four-bar mechanisms for driving the blocking piece to act are arranged in the fan frame, each four-bar mechanism comprises a first connecting bar, a second connecting bar and a hook, the first connecting bar is located at the position corresponding to the lower part of the blocking piece, the second connecting bar is located at the position corresponding to the upper part of the blocking piece, one end of the first connecting bar is rotatably connected with the blocking piece, the other end of the first connecting bar is rotatably connected with the position on the inner side of the fan frame, the joint of the first connecting bar and the blocking piece keeps the trend of upward turning, the hook is arranged on the air inlet body and located above the first connecting bar, when the air inlet body is located at the first position, the hook is separated from the first connecting bar, and when the air inlet body descends to the second position from the first position, the hook presses down the first link so that the flap moves to close the incision.

In order to facilitate the interaction of the hook and the first connecting rod, the hook comprises a longitudinal extending part fixedly connected with the air inlet body and a transverse extending part extending out of the air inlet body from the upper end of the longitudinal extending part, the first connecting rod is provided with a retaining column towards one side inside the fan frame, and the transverse extending part is positioned above the retaining column and can be pressed down by being abutted to the retaining column when the air inlet body descends.

Preferably, in order to enable the first connecting rod to keep the reset trend, the four-bar linkage mechanism further comprises a fixing plate, the fixing plate is located on the front side of the blocking piece, the first connecting rod is connected with the fan frame through the fixing plate, and a spring used for resetting is further connected between the fixing plate and the first connecting rod, so that the connecting position of the first connecting rod and the blocking piece keeps the upward overturning trend.

Preferably, the structure of fan frame and the air inlet body does, the fan frame still includes first preceding lateral wall and first back lateral wall, the air inlet body includes lateral wall, second back lateral wall, second left side wall and second right side wall before the second, the second back lateral wall of the air inlet body is located the rear side of the first back lateral wall of fan frame, the first preceding lateral wall of the air inlet body is crossing with the incision on the first left side wall of fan frame, the second right side wall, the air intake is seted up before the second on the lateral wall.

In order to facilitate the lifting of the air inlet body, the air inlet body further comprises a top plate connected between the upper end portions of the second front side wall, the second rear side wall, the second left side wall and the second right side wall, an opening is formed in the position where the top plate corresponds to the fan frame, guide rails extending up and down are arranged on the outer sides of the first left side wall and the first right side wall of the fan frame and the position behind the notch, and supports are respectively arranged at the positions, located on the left side and the right side of the opening, of the top plate and are in sliding fit with the guide rails.

The lifting mechanism is used for driving the air inlet body to lift, and the moving mechanism is a linear driving module.

Preferably, the driving mechanism is a motor arranged above the fan frame, an output shaft of the motor extends downwards, the transmission mechanism comprises a screw rod and a screw nut, the screw rod extends in the up-down direction, the screw nut is fixedly connected with the air inlet body, one end of the screw rod is connected with the output shaft of the motor, and the other end of the screw rod is in threaded connection with the screw nut.

In order to ensure that the air inlet is opened only when the machine is started, the oil smoke is prevented from flowing backwards, and the appearance of the whole machine is kept, a smoke baffle plate which can turn over relative to the air inlet body so as to open or close the air inlet is arranged at the air inlet.

In order to facilitate the smoke baffle to automatically open and close in the air inlet lifting process, the upper end of the smoke baffle is connected to the air inlet through a hinge, the hinge enables the smoke baffle to keep the trend of upwards turning and opening the air inlet, rollers are arranged at the lower ends of the first left side wall and the first right side wall of the fan frame and on one side facing the fan frame part, the rotating shafts of the rollers are in the left-right direction, and at least parts of the rollers are exposed out of the bottom surface of the fan frame and are close to the notch.

Compared with the prior art, the invention has the advantages that: the opening and closing of the fan frame is realized by arranging the opening capable of being opened and closed on the fan frame, the wide air inlet body is greatly lifted and the relative tightness of the fan frame is ensured in the working process of the range hood under the condition that the left width and the right width of the air inlet body are not increased, the air inlet body is lifted to realize partial or even complete concealment under the closing state of the range hood, and the air inlet body is lowered to be close to a cooker under the working state of the range hood to ensure good oil smoke absorption effect; in addition, utilize the relative position of air inlet body and fan frame, realize keeping off the automatic opening and shutting of cigarette board, and do not have newly-increased actuating mechanism, simple structure operates steadily.

Drawings

Fig. 1 is a schematic view of an open state of a range hood according to an embodiment of the present invention;

FIG. 2 is a sectional view of the range hood according to the embodiment of the present invention in an open state;

FIG. 3 is an enlarged view of a portion I of FIG. 2;

FIG. 4 is an enlarged view of portion II of FIG. 2;

FIG. 5 is a partial cross-sectional view of the range hood according to the embodiment of the present invention (hidden air intake and hook);

FIG. 6 is an enlarged view of a portion III of FIG. 5;

fig. 7 is an exploded schematic view of a range hood according to an embodiment of the present invention;

fig. 8 is a schematic view of a range hood in a closed state according to an embodiment of the present invention;

fig. 9 is a sectional view of a range hood according to an embodiment of the present invention in a closed state;

FIG. 10 is an enlarged view of a portion IV of FIG. 9;

FIG. 11 is a sectional view of the range hood according to the embodiment of the present invention in a closed state (with hidden air intake and hook);

FIG. 12 is an enlarged view of a portion V of FIG. 11;

fig. 13 is an exploded view of the hinge of the range hood according to the embodiment of the present invention.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures, wherein like or similar reference numerals indicate like or similar elements or elements having like or similar functions.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Referring to fig. 1 and 2, a range hood includes a fan frame 1 and an air inlet body 2, both of which are hollow, and a fan 3 (an impeller of the fan 3 is not shown) is arranged in the fan frame 1. The width of the air inlet body 2 in the left-right direction is larger than that of the fan frame 1, and the thickness of the air inlet body 2 in the front-back direction is smaller than that of the fan frame 1. The fan frame 1 is fixedly arranged on a wall body, and the air inlet body 2 is arranged at the rear part of the fan frame 1 and can lift relative to the fan frame 1.

Referring to fig. 2 to 7, the wind frame 1 includes a first front sidewall 11, a first rear sidewall 12, a first left sidewall 13, and a first right sidewall 14, and the wind inlet body 2 includes a second front sidewall 21, a second rear sidewall 22, a second left sidewall 23, and a second right sidewall 24. Wherein, the second rear side wall 22 of the air inlet body 2 is located at the rear side of the first rear side wall 12 of the fan frame 1, and the first front side wall 21 of the air inlet body 2 is intersected with the first left side wall 13 and the second right side wall 14 of the fan frame 1, so that the air inlet body 2 wraps the left side and the right side of the fan frame 1. An air inlet 25 is formed in the position, close to the lower end, on the first front side wall 21 of the air inlet body 2, and a smoke baffle 26 which can be overturned relative to the first front side wall 21 is arranged at the air inlet 25, so that the air inlet 25 is opened or closed.

The first left side wall 13 and the first right side wall 14 of the fan frame 1 are respectively provided with a notch 15, and the two notches 15 correspond to each other in position. The cutout 15 of the first left sidewall 13 is formed by upwardly recessing the lower end surface of the first left sidewall 13, and the cutout 15 of the first right sidewall 14 is formed by upwardly recessing the lower end surface of the first right sidewall 14. The notches 15 are preferably long-strip-shaped and are matched with the thickness of the second front side wall 21 of the air inlet body 2, so that the second front side wall 21 of the air inlet body 2 can penetrate through the two notches 15, and the notches 15 can be arranged to avoid the lifting of the air inlet body 2. The fan 3 is located at the front side of the slit 15 to avoid interference with the air intake body 2.

The air inlet body 2 further comprises a top plate 27 connected between the upper end parts of the side walls, and an opening 271 is formed in the position, corresponding to the fan frame 1, of the top plate 27, so that the interior of the air inlet body 2 is communicated with the interior of the fan frame 1. The outer sides of the first left side wall 13 and the first right side wall 14 of the wind turbine frame 1 and the positions behind the notches 15 are provided with guide rails 16 extending up and down, the positions of the top plate 27, which are positioned at the left and right sides of the opening 271, are respectively provided with a bracket 272, the brackets 272 extend into the opening 271 and are fixedly connected with the top plate 27, the brackets 272 are used for being matched with the guide rails 16, and the brackets 272 slide along one side of the guide rails 16, which is far away from the interior of the wind turbine frame 1, so that the lifting and falling of the wind turbine body 2 are guided.

The range hood further comprises a movement mechanism for driving the air inlet body 2 to lift, the movement mechanism comprises a driving mechanism and a transmission mechanism, in the embodiment, the driving mechanism is a motor 41 and is arranged above the fan frame 1, and an output shaft of the driving mechanism extends downwards. The transmission mechanism comprises a screw rod 42 and a screw rod nut 43, the screw rod 42 extends in the up-down direction, the screw rod nut 43 is fixedly connected with the second front side wall 21 of the air inlet body 2, one end of the screw rod 42 is connected with an output shaft of the motor 41, and the other end of the screw rod 42 is in threaded connection with the screw rod nut 43. The transmission mechanism can be a ball screw or a T-shaped screw. Alternatively, the moving mechanism may be any other existing linear driving module as long as the moving mechanism can drive the air inlet body 2 to lift up and down.

Referring to fig. 2, 3, 11 and 12, in order to prevent the range hood from working and prevent the air inlet body 2 from falling, the air leakage of the fan frame 1 is caused by the existence of the notches 15, the blocking pieces 17 are respectively arranged on the inner sides of the first left side wall 13 and the first right side wall 14 of the fan frame 1 and the positions corresponding to the notches 15, and the size and the shape of the blocking pieces 17 are matched with the notches 15, so that the notches 15 can be closed, and the air tightness of the fan frame 1 is realized. Each flap 17 is translated by a respective four-bar linkage.

Each four-link mechanism includes a first link 181, a second link 182, a hook 183, and a fixing plate 184. The first connecting rod 181 and the second connecting rod 182 are vertically spaced, preferably, the first connecting rod 181 is located at a position corresponding to the lower portion of the blocking piece 17, the second connecting rod 182 is located at a position corresponding to the upper portion of the blocking piece 17, and the fixing plate 184 is located at the front side of the blocking piece 17 and is connected and fixed with the first left sidewall 13 or the first right sidewall 14 of the fan frame 1. One end of the first link 181 is rotatably connected to the stopper 17, and the other end is rotatably connected to the fixing plate 184. One end of the second connecting rod 182 is rotatably connected with the fan frame 1, the other end of the second connecting rod is rotatably connected with the blocking piece 17, and the joint of the second connecting rod 182 and the fan frame 1 is positioned at the front side of the blocking piece 17. The hook 183 is connected to the second front sidewall 21 of the air intake body 2, the hook 183 includes a longitudinal extension 1831 connected to the air intake body 2 and a lateral extension 1832 extending forward from an upper end of the longitudinal extension 1831, the longitudinal extension 1831 is connectable to a side of the second front sidewall 21 of the air intake body 2 facing the inside of the air intake body 2, and the lateral extension 1832 extends above the air intake body 2 to a front side of the air intake body 2 for acting with the first link 181. A stop post 1811 may be provided on the side of the first link 181 facing the interior of the blower housing 1, and a lateral extension 1832 is located above the stop post 1811 and can abut against the stop post 1811 or move away from the stop post 1811. A spring 185 (which may also be a torsion spring) for resetting is further connected between the fixing plate 184 and the first link 181, a first connecting column 1812 may also be disposed on one side of the first link 181 facing the inside of the blower frame 1, a second connecting column 1841 may also be disposed on one side of the fixing plate 184 facing the inside of the blower frame 1, and two ends of the spring 185 are respectively connected with the first connecting column 1812 and the second connecting column 1841. The spring 185 keeps the connection (rear end) of the first link 181 and the flap 17 in a tendency of turning upward, the center of rotation being the connection of the first link 181 and the fixing plate 184. Alternatively, the fixing plate 184 may not be provided, and the second connecting post 1841 may be directly provided on the blower housing 1.

Alternatively, the four-bar mechanism can be interchanged with the front and rear positions of the air inlet body, and the four-bar mechanism is arranged to be symmetrical to the air inlet body.

In the initial state, when the air inlet body 2 is at the first position at least partially accommodated in the blower rack 1, the blocking piece 17 is located at the front side of the notch 15, and the first link 181 and the second link 182 respectively extend upwards from front to back, as shown in fig. 11 and 12. When the range hood is opened and the air inlet body 2 descends to a certain height, the bottom surface of the transverse extension portion 1832 of the hook 183 contacts the blocking column 1811 of the first connecting rod 181 of the four-bar linkage, the blocking column 1811 is pressed downwards, so that the first connecting rod 181 rotates downwards around the connection with the fixing plate 184, the blocking piece 17 is driven to translate downwards and backwards until the first connecting rod 181 and the second connecting rod 182 approach to the horizontal, the blocking piece 17 moves to the position corresponding to the notch 15 to close the notch 15, the air inlet body 2 descends to the second position below the fan frame 1 (or may be located in the fan frame 1 at least), and the second position is lower than the first position. When the range hood is closed again, the air inlet body 2 moves upwards until the hook 183 does not exert an acting force on the first connecting rod 181 any more, the rear end of the first connecting rod 181 is turned upwards again under the action of the spring 185, and the blocking piece 17 moves forwards and upwards to move away from the notch 15, so that the second left side wall 23 and the second right side wall 24 of the air inlet body 2 move upwards along the notch 15.

Referring to fig. 2, 4 to 6, 9, 10 and 13, the upper end of the smoke barrier 26 at the air inlet 25 is hinged to the second front sidewall 21 of the air inlet body 2 by a hinge 28. The hinge 28 includes a movable plate 281 for connecting with the smoke barrier 26, a fixed seat 282 connected with the second front sidewall 21 of the air intake body 2, a torsion spring 283 and an end cover 284. The movable plate 281 is provided with a first rotating shaft 285 and a blocking plate 286 extending in the left-right direction, and the blocking plate 286 is located at a side of the first rotating shaft 285 far away from the second front sidewall 21. The fixing base 282 is provided with a second rotation shaft 287 extending in a left-right direction, the second rotation shaft 287 is inserted from one end of the first rotation shaft 285, the end cap 284 is inserted from the other end of the first rotation shaft 285 to be connected with the second rotation shaft 287, so that axial positions of the first rotation shaft 285 and the second rotation shaft 287 are defined, and the first rotation shaft 285 and the second rotation shaft 287 are relatively rotatable. A torsion spring 283 is provided at the outer periphery of the first rotation shaft 285, and both end portions of the torsion spring 283 abut against the fixing base 282 and the blocking plate 286, respectively. The torsion spring 283 keeps the blocking piece 286 moving in a direction away from the fixed seat 282, thereby keeping the movable plate 281 connected with the smoke barrier 26 forward to push the smoke barrier 26 out of the tendency to keep turning upward to open the air inlet 25. The lower ends of the first left side wall 13 and the first right side wall 14 of the fan frame 1 are provided with rollers 19 on one side facing the inside of the fan frame 1, and the rotating shafts of the rollers 19 are in the left-right direction. The roller 19 is at least partially exposed from the bottom surface of the fan frame 1 and is close to the notch 15 so as to act with the smoke barrier 26 on the air inlet body 2.

When the range hood is started, the smoke baffle 26 on the air inlet body 2 is in an open state, see fig. 1. When the range hood is closed, the air inlet body 2 moves upwards relative to the fan frame 1, and when the smoke baffle 26 contacts the roller 19, the smoke baffle 26 overturns backwards under the pressure of the roller 19 and is gradually closed until being completely closed, as shown in fig. 8. When the range hood is turned on again, the air inlet body 2 descends again, after the smoke baffle 26 leaves the roller 19, due to no external force, the smoke baffle 26 is turned on again under the action of the torsion spring 283 to start smoking, and the oil smoke enters the air inlet body 2 through the air inlet 25, upwards enters the fan frame 1 through the opening 271 and is discharged to the outside through the fan frame 1.

Claims

1. The utility model provides a range hood, includes fan frame (1) and the air inlet body (2) that can relatively fan frame (1) go up and down, air intake (25) have been seted up on air inlet body (2), air inlet body (2) can be in the primary importance and be less than the second position of primary importance, work as when air inlet body (2) are in the primary importance air inlet body (2) at least part is located fan frame (1), works as when air inlet body (2) are in the second place air intake (25) are located fan frame (1) below, its characterized in that: the width of the air inlet body (2) in the left and right directions is greater than the fan frame (1), the fan frame (1) includes first left side wall (13) and first right side wall (14), offer incision (15) that the confession air inlet body (2) that extend from top to bottom upwards passed on first left side wall (13) and first right side wall (14), the position that corresponds with incision (15) is provided with separation blade (17) in fan frame (1), when air inlet body (2) is in the first position separation blade (17) are adjacent with incision (15), when air inlet body (2) is in the second position, separation blade (17) are sealed incision (15).

2. The range hood of claim 1, wherein: the wind machine frame (1) is internally provided with four-bar mechanisms for driving the blocking piece (17) to act, each four-bar mechanism comprises a first connecting bar (181), a second connecting bar (182) and a hook (183), the first connecting bar (181) is positioned at the position corresponding to the lower part of the blocking piece (17), the second connecting bar (182) is positioned at the position corresponding to the upper part of the blocking piece (17), one end of the first connecting bar (181) is rotatably connected with the blocking piece (17), the other end of the first connecting bar is rotatably connected with the position at the inner side of the wind machine frame (1), one end of the second connecting bar (182) is rotatably connected with the blocking piece (17), the other end of the second connecting bar is rotatably connected with the position at the inner side of the wind machine frame (1), the connection part of the first connecting bar (181) and the blocking piece (17) keeps the trend of upwards overturning, the hook (183) is arranged on the wind inlet body (2) and positioned above the first connecting bar (, the hook (183) is separated from the first connecting rod (181), and when the air inlet body (2) is lowered from the first position to the second position, the hook (183) presses the first connecting rod (181) downwards so that the blocking piece (17) moves to close the notch (15).

3. The range hood of claim 2, wherein: the hook (183) comprises a longitudinal extension part (1831) fixedly connected with the air inlet body (2) and a transverse extension part (1832) extending out of the air inlet body (2) from the upper end of the longitudinal extension part (1831), the first connecting rod (181) is provided with a catch column (1811) towards one side of the interior of the air inlet frame (1), and the transverse extension part (1832) is located above the catch column (1811) and can abut against the catch column (1811) to press the catch column (1811) downwards when the air inlet body (2) descends.

4. The range hood of claim 2, wherein: the four-bar linkage mechanism further comprises a fixing plate (184), the fixing plate (184) is located on the front side of the blocking piece (17), the first connecting rod (181) is connected with the fan frame (1) through the fixing plate (184), and a spring (185) for resetting is further connected between the fixing plate (184) and the first connecting rod (181), so that the connection position of the first connecting rod (181) and the blocking piece (17) keeps the upward overturning trend.

5. The range hood of claim 1, wherein: the utility model discloses a fan frame, including fan frame (1), fan frame (1) and first back lateral wall (12), the air inlet body (2) includes second front side wall (21), second back side wall (22), second left side wall (23) and second right side wall (24), second back side wall (22) of the air inlet body (2) are located the rear side of first back side wall (12) of fan frame (1), first front side wall (21) of the air inlet body (2) intersect with incision (15) on first left side wall (13), the second right side wall (14) of fan frame (1), air intake (25) are seted up on second front side wall (21).

6. The range hood of claim 5, wherein: the air inlet body (2) is characterized by further comprising a top plate (27) connected between the upper end portions of the second front side wall (21), the second rear side wall (22), the second left side wall (23) and the second right side wall (24), wherein an opening (271) is formed in the position, corresponding to the fan frame (1), of the top plate (27), guide rails (16) extending up and down are arranged in the positions, behind the notch (15), of the outer sides of the first left side wall (13) and the first right side wall (14) of the fan frame (1), and supports (272) are respectively arranged in the positions, located on the left side and the right side of the opening (271), of the top plate (27), and the supports (272) are in sliding fit with the guide rails (16).

7. The range hood according to any one of claims 1 to 6, wherein: the air intake device is characterized by further comprising a movement mechanism for driving the air intake body (2) to lift, wherein the movement mechanism is a linear driving module.

8. The range hood of claim 7, wherein: the moving mechanism comprises a driving mechanism and a transmission mechanism, the driving mechanism is a motor (41) arranged above the fan frame (1), an output shaft of the motor (41) extends downwards, the transmission mechanism comprises a screw rod (42) and a screw nut (43), the screw rod (42) extends in the up-down direction, the screw nut (43) is fixedly connected with the air inlet body (2), one end of the screw rod (42) is connected with the output shaft of the motor (41), and the other end of the screw rod is in threaded connection with the screw nut (43).

9. The range hood according to any one of claims 1 to 6, wherein: the air inlet (25) is provided with a smoke baffle (26) which can turn over relative to the air inlet body (2) so as to open or close the air inlet (25).

10. The range hood of claim 9, wherein: the upper end of the smoke baffle plate (26) is connected to the air inlet (25) through a hinge (28), the hinge (28) enables the smoke baffle plate (26) to keep the trend of turning upwards to open the air inlet (25), rollers (19) are arranged at the lower ends of the first left side wall (13) and the first right side wall (14) of the fan frame (1) and on one side facing the inside of the fan frame (1), the rotating shaft of each roller (19) is in the left-right direction, and at least part of each roller (19) is exposed out of the bottom surface of the fan frame (1) and is close to the notch (15).