CN114440277A

CN114440277A - Fume exhaust fan

Info

Publication number: CN114440277A
Application number: CN202210105472.8A
Authority: CN
Inventors: 项章特; 刘杰; 陈浩辉; 苏钦印
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-05-06
Anticipated expiration: 2042-01-28
Also published as: CN114440277B

Abstract

The invention discloses a range hood, which comprises an air inlet assembly and an air outlet, wherein the air inlet assembly comprises a front side wall and a rear side wall which are arranged at intervals in the front-rear direction, and the front side wall is provided with an air inlet; the range hood also comprises a smoke baffle plate component, the smoke baffle plate component comprises a smoke baffle plate capable of opening and closing the air inlet, the smoke baffle plate component also comprises a baffle plate structure, and when the smoke baffle plate is in a state of closing the air inlet, the baffle plate structure extends between the front side wall and the rear side wall to isolate the air inlet and the air outlet; when the smoke baffle is in a state of opening the air inlet, the baffle structure rotates relative to the air inlet assembly to enable the air inlet to be communicated with the air outlet in a fluid mode. Compared with the prior art, the invention has the advantages that: the baffle structure can keep apart air intake and air outlet under the closed condition to form dual isolation structure with the fender cigarette board, avoid the oil smoke to flow backward and taint the flavor, can let out inlet air channel and reduce the influence to the air inlet under the open condition again.

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 the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

Current range hood, the chinese patent that application number is 201721189887.9 discloses a lampblack absorber, the lampblack absorber includes left part smoking mouth, right part smoking mouth and left side and keeps off cigarette board and right side cigarette board, keep off the closing cap with the cigarette board can open left part smoking mouth, the closing cap with the cigarette board can open right side smoking mouth.

According to the range hood, the smoke baffle is arranged to collect smoke so as to reduce the escape of the smoke, and although the smoke baffle can prevent the smoke in the public flue from flowing backwards to a certain extent when closed, the smoke baffle still has leakage and influences the kitchen environment.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a range hood aiming at the problems in the prior art, and the range hood can prevent oil smoke from flowing backward and tainting odor through double isolation.

The technical scheme adopted by the invention for solving the technical problems is as follows: a range hood comprises an air inlet assembly and an air outlet, wherein the air inlet assembly comprises a front side wall and a rear side wall which are arranged at intervals, and an air inlet is formed in the front side wall; range hood still includes keeps off the cigarette board subassembly, keep off the cigarette board subassembly including the cigarette board that keeps off that can open and close the air intake, its characterized in that: the smoke baffle plate assembly further comprises a baffle plate structure, and when the smoke baffle plate is in a state of closing the air inlet, the baffle plate structure extends between the front side wall and the rear side wall to isolate the air inlet and the air outlet; when the smoke baffle is in a state of opening the air inlet, the baffle structure rotates relative to the air inlet assembly to enable the air inlet to be communicated with the air outlet in a fluid mode.

According to one aspect of the present invention, a barrier structure for closing and opening a passageway by a folding structure, the barrier structure comprising a first barrier and a second barrier, each barrier having a width in a front-to-rear direction adapted to a distance between a front side wall and a rear side wall, each barrier having a first end portion mutually close to the other barrier and a second end portion mutually distant from the other barrier, the first end portions of the first barrier and the second barrier being rotatably connected to each other, and axes of rotation of the first barrier and the second barrier extending in the front-to-rear direction; when the smoke baffle is in a state of closing the air inlet, the first baffle and the second baffle are in an unfolded state, and when the smoke baffle is in a state of opening the air inlet, the first baffle and the second baffle are folded relatively.

For simplify motion for keep off cigarette board and baffle structure and realize the linkage, keep off the cigarette board and have relative first end and second end, keep off the cigarette board and rotate with the air inlet subassembly near first end department and be connected, the second end that keeps off the cigarette board is the free end, and when keeping off the state that the cigarette board is in the closed air intake, first end is higher than the second end, is provided with the splenium of extending to the direction of keeping away from the second end at the first end that keeps off the cigarette board, it is located the air inlet subassembly and can press the baffle structure and make the baffle structure fold when keeping off the cigarette board and opening to press the splenium, the trend that the baffle structure kept expanding to be not higher than the first end of keeping off the cigarette board when the baffle structure expandes.

In order to facilitate the baffle structure to keep the unfolding trend, the first baffle and the second baffle are connected through a rotating shaft, and a torsion spring is arranged on the rotating shaft, so that the first baffle and the second baffle keep the unfolding trend.

For the baffle structure expandes and folds steadily, the second tip and the air inlet subassembly of first baffle rotate to be connected, the second tip of second baffle moves in left and right sides direction, be provided with between the rear wall of air inlet subassembly and the second baffle and move the guide structure that leads to the second tip of second baffle.

Preferably, the guide structure comprises a protrusion arranged at or near the second end of the second baffle plate, and a guide groove formed in the rear side wall of the air intake assembly, the guide groove extends in the left-right direction, and the protrusion can slide along the guide groove.

In order to further enable the baffle structure to be stably unfolded and folded, the air inlet assembly further comprises a left side wall and a right side wall, the left side wall is arranged between the left end parts of the front side wall and the rear side wall, and the right side wall is arranged between the right end parts of the front side wall and the rear side wall; the baffle plate structures are provided with two groups which are arranged left and right, the second end parts of the first baffle plates of the baffle plate structures on the left side are close to the left side wall of the air inlet assembly, the second end parts of the first baffle plates of the baffle plate structures on the right side are close to the right side wall of the air inlet assembly, and the two second baffle plates are positioned between the two first baffle plates; when the baffle structure is unfolded, the second ends of the two second baffles are attached to each other.

According to another aspect of the present invention, the closure and the opening of the passage are achieved by the rotation of a plate member, which is a plate member having a width adapted to the distance between the front and rear side walls of the air intake assembly, and a baffle structure, which is rotatably connected to the air intake assembly and rotates along an axis extending in the left-right direction.

In order to facilitate the rotation of the driving baffle plate structure, the range hood further comprises a movement mechanism, the movement mechanism comprises a driving mechanism and a transmission mechanism, the transmission mechanism comprises two connecting shafts, the two connecting shafts are respectively arranged at the left side and the right side of the baffle plate structure and extend along the left-right direction, the end part of each connecting shaft, which is far away from the baffle plate structure, is respectively connected with the corresponding position of the air inlet assembly in a rotating manner, and the connecting shafts are driven by the driving mechanism to rotate around the axes of the connecting shafts.

For simplifying the motion mechanism, make and keep off cigarette board and baffle structure and realize the linkage, keep off the transmission between cigarette board and the connecting axle and be connected to make and keep off the cigarette board and open and close the air intake with overturning.

For avoiding the possible leakage in the left and right sides of opening because of the setting of connecting axle, keep off the cigarette board subassembly and still include two baffles, every baffle extends in the front and back direction, the bottom of baffle is located the top of air intake, and every baffle corresponds baffle structure ascending tip in the left and right sides, and when keeping off the state that the cigarette board is in the closed air intake, both ends are pasted tightly with the baffle of relevant position about the baffle structure.

Compared with the prior art, the invention has the advantages that: through setting up baffle structure, can keep apart air intake and air outlet under the closed condition to form dual isolation structure with the fender cigarette board, avoid the oil smoke to flow backward and taint the flavor, can let out inlet air channel and reduce the influence to the air inlet under the open mode again.

Drawings

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

fig. 2 is a sectional view (left-right direction section) of the hidden fan frame of the range hood of fig. 1;

FIG. 3 is a cross-sectional view (front-to-back cross-section) of the hidden fan frame of the range hood of FIG. 1;

fig. 4 is a schematic view of the hidden front sidewall of the air intake assembly of the range hood according to the first embodiment of the present invention;

fig. 5 is a schematic view of a smoke baffle and a pressing portion of the range hood according to the first embodiment of the present invention;

fig. 6 is a schematic view of a baffle structure of a range hood according to a first embodiment of the present invention;

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

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

fig. 9 is a sectional view (left-right direction section) of the hidden fan frame of the range hood of fig. 8;

fig. 10 is a sectional view (front-rear section) of the hidden fan frame of the range hood of fig. 8;

fig. 11 is a schematic view of an open state of a range hood according to a second embodiment of the present invention;

fig. 12 is a cross-sectional view (left-right cross-section) of the hidden fan frame of the range hood of fig. 11;

fig. 13 is a sectional view (front-rear section) of the hidden fan frame of the range hood of fig. 11;

FIG. 14 is a schematic view of a smoke barrier assembly and its moving mechanism of the range hood of FIG. 11;

fig. 15 is a sectional view (left-right direction section) of a hidden fan frame of a range hood according to a second embodiment of the present invention;

fig. 16 is a sectional view (front-rear section) of a hidden fan frame of a range hood according to a second embodiment of the present invention;

fig. 17 is a schematic view of a smoke baffle assembly of the range hood of fig. 16.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same 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 present invention and to simplify the description, but 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 that the directional terms are used for purposes of illustration and are not to be construed as limiting, for example, because the disclosed embodiments of the present invention may be oriented in different directions, "lower" is not necessarily limited to a direction opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Example one

Referring to fig. 1 to 4, a range hood includes an air intake assembly 1 and a fan frame 2 disposed above the air intake assembly 1, wherein a fan system (not shown) is disposed in the fan frame 2. The air inlet component 1 is communicated with the fluid in the fan frame 2.

The thickness of the air intake component 1 in the front-back direction is smaller than that of the fan frame 2, and the thickness of the air intake component 1 can be adjusted, wherein the front side is the side close to a user in a use state, and the back side is the side far away from the user in the use state. The air inlet component 1 comprises a front side wall 11 and a rear side wall 12 which are arranged at a front-rear interval, a left side wall 13 is connected between the left end parts of the front side wall 11 and the rear side wall 12, a right side wall 14 is connected between the right end parts of the front side wall 11 and the rear side wall 12, a top wall 15 is connected between the top ends of the front side wall 11 and the rear side wall 12, and a bottom wall 16 is connected between the bottom ends of the front side wall 11 and the rear side wall 12. Thus, the air intake unit 1 has a hollow box shape. The front side wall 11 is provided with an air inlet 17, and the air inlet 17 is preferably close to the bottom of the front side wall 11, so that the air inlet 17 is close to a smoke source, and the oil smoke can be better locked before rising.

The range hood still includes air outlet 5, and in this embodiment, the top of fan frame 2 is provided with air outlet cover 6, and air outlet cover 6 export constitutes foretell air outlet 5 promptly, and the substitutable air outlet 5 also can be other forms among other prior art.

The range hood further comprises a smoke baffle assembly, wherein the smoke baffle assembly comprises a smoke baffle 41 and a baffle structure 42, the smoke baffle 41 can be in a flat shape and is rotatably connected with the air inlet assembly 1, and therefore the air inlet 17 can be opened and closed in a turnover mode. The left and right sides of the air intake component 1 are respectively provided with a pin 18, and in the embodiment, the pin 18 is respectively fixed with the left side wall 13 and the right side wall 14. The smoke barrier 41 has a first end 411 and a second end 412 opposite to each other, and in this embodiment, the smoke barrier 41 has a long bar shape, and the first end 411 and the second end 412 are opposite to each other in the width direction. The smoke barrier 41 is rotatably connected to the pin 18 at left and right sides near the first end 411, respectively, and the second end 412 is a free end, so that the smoke barrier 41 can rotate coaxially with the pin 18. In the closed state, the first end 411 is higher than the second end 412.

The range hood also comprises a movement mechanism for driving the smoke baffle plate 41 to overturn relative to the air inlet assembly 1. The movement mechanism comprises a driving mechanism 71, in this embodiment, the driving mechanism 71 is an electric push rod, the electric push rod is fixed with the inner side of the air intake component 1, the output end of the electric push rod is rotatably connected with the smoke baffle 41, and the axis of the rotating shaft at the rotating connection position extends in the left-right direction. The front wall 11 is provided with a clearance hole 111 at the left and right sides of the air inlet 17, so that the driving mechanism 71 can pass through the clearance hole 111 and be connected with the smoke barrier 41.

The baffle structure 42 is disposed in the air intake assembly 1 and linked with the smoke baffle 41, so as to be folded when the smoke baffle 41 is in a state of opening the air inlet 17, so as to communicate the fluid between the air inlet 17 and the air outlet 5, and when the smoke baffle 41 is in a state of closing the air inlet 17, the smoke baffle is unfolded and extends between the front side wall 11 and the rear side wall 12, so as to isolate the air inlet 17 from the air outlet 5. The baffle structure 42 is deployed no higher than the first end 411 of the smoke barrier 41.

Specifically, referring to fig. 2 to 7, the baffle structures 42 preferably have two sets, each set of baffle structures 42 includes a first baffle 421 and a second baffle 422, each baffle has a first end portion close to the other baffle and a second end portion far away from the other baffle, the first end portions of the first baffle 421 and the second baffle 422 are rotatably connected through a rotating shaft 423, and the rotating shaft 423 extends in the front-rear direction. A torsion spring 424 is provided on the rotating shaft 423 to maintain the tendency of the first and

second shutters

421 and 422 to unfold. The two baffle structures 42 are arranged side to side and are symmetrical. Through setting up two sets of baffle structures 42, can make the length of each baffle less, the stroke is shorter, improves the stability of motion.

In the present invention, "unfolded" means that the angle between the two flaps is equal to or close to 180 °, and "folded" means that the angle between the two flaps is less than 180 °, while being less than the angle in the "unfolded" state, preferably an acute angle. The width of each baffle in the front-back direction is adapted to the distance between the front side wall 11 and the rear side wall 12, where adapted means close to or corresponding to the distance between the front side wall 11 and the rear side wall 12, so that the channel in the air intake assembly 1 can be closed in the front-back direction in the unfolded state of the baffle structure 42.

In this embodiment, the second end of the first baffle 421 is rotatably connected to the air intake assembly 1, the second end of the first baffle 421 of the left baffle structure 42 is close to the left sidewall 13 of the air intake assembly 1, the second end of the first baffle 421 of the right baffle structure 42 is close to the right sidewall 14 of the air intake assembly 1, and the height of the connection between the first baffle 421 and the air intake assembly 1 is close to the height of the pin 18. Two second baffles 422 are located between the two first baffles 421. A protrusion 4221 is arranged at the second end of each second baffle 422 or a position close to the second end, a guide groove 121 extending left and right is formed in the rear side wall 12 of the air intake assembly 1, and the protrusion 4221 can slide along the guide groove 121. The positions of the boss 4221 and the guide groove 121 may also be interchanged.

In order to facilitate the linkage between the smoke barrier 41 and the baffle structure 42, a pressing portion 43 extending in a direction away from the second end 412 is disposed at the first end 411 of the smoke barrier 41, and the pressing portion 43 is located in the air intake assembly 1.

Alternatively, the smoke barrier 41 may be turned in any manner available in the art, including connection to the intake assembly 1 and movement mechanisms, without interference.

Referring to fig. 8 to 10, when the range hood is closed, the smoke barrier 41 is vertical, the air inlet 17 is closed, at this time, each barrier structure 42 is in an expanded state under the action of the torsion spring 424, the second ends of the two second barriers 422 are tightly attached to each other, so that the channel in the air inlet assembly 1 is closed in the front-rear direction, and the air inlet 17 and the air outlet 5 are isolated from each other. Even if the oil smoke flows backwards from the air outlet 5, the oil smoke can be blocked by the baffle structure 42 and the smoke baffle plate 41, and cannot enter the kitchen.

Referring to fig. 1 to 3, when the range hood is to be opened, the moving mechanism drives the smoke barrier 41 to turn over relative to the air intake assembly 1, and the second end 412 of the smoke barrier is turned outwards (forwards), so that the pressing portion 43 at the first end 411 of the smoke barrier 41 is turned downwards, the first baffle 411 and the second baffle 412 are folded by a downward force, the second end of the second baffle 412 of each baffle structure 42 gradually slides towards the direction of the second end of the corresponding first baffle 411, at this time, the protrusion 4221 and the guide groove 121 are matched to guide the movement of the second baffle 422, and a movement track thereof is defined, so that the distance between the two second baffles 412 is gradually extended, a channel in the air intake assembly 1 is not closed, and oil smoke entering from the air intake 17 can smoothly flow to the air outlet 5 and be discharged. The baffle structure 42 is now folded and hardly interferes with the intake air.

Thereafter, when the range hood is closed again, the moving mechanism drives the smoke baffle 41 to turn over relative to the air intake assembly 1, and the second end 412 turns over backwards, so that the pressing portion 43 at the first end 411 of the smoke baffle 41 leaves the baffle structure 42 upwards, under the action of the torsion spring 424, the first baffle 411 and the second baffle 422 gradually expand until being flattened or nearly flattened, the second ends of the second baffles 422 are tightly attached to each other, and the channel in the air intake assembly 1 is closed again in the front-rear direction.

The baffle plate structure 42 can be applied to range hoods of other shapes as well, as long as the oil smoke channel can be closed in the air intake assembly 1 in the closed state to isolate the air inlet 17 from the air outlet 5. In addition, the baffle structure 42 may be provided with a separate movement mechanism.

Example two

Referring to fig. 11 to 14, the present embodiment is different from the first embodiment in that the baffle structure 42' is a flat plate structure, and the width thereof is adapted to the distance between the front side wall 11 and the rear side wall 12 of the air intake assembly 1. The cigarette blocking plate 41 is not provided with the pressing part 43.

The motion mechanism includes a transmission mechanism in addition to the driving mechanism 71 ', the driving mechanism 71 ' is a motor in this embodiment, the transmission mechanism includes a connecting rod 721 and a connecting shaft 722, the connecting shaft 722 has two connecting shafts 722 and is respectively disposed at the left and right sides of the baffle structure 42 ' and extends along the left and right direction, the end of each connecting shaft 722 far from the baffle structure 42 ' is respectively rotatably connected with the corresponding left sidewall 13 or right sidewall 14 of the air intake assembly 1, and can be driven by the motor to rotate around its own axis to drive the baffle structure 42 to rotate, and the axis of the connecting shaft 722 is the rotation axis of the baffle structure 42 '. The links 721 also have two, and each link 721 is provided corresponding to one connecting shaft 722. Preferably, the connecting rod 721 can be bent, one end of the connecting rod 721 is fixed to the connecting shaft 722, and the other end of the connecting rod is connected to the smoke barrier 41, so that when the connecting shaft 722 rotates, the connecting rod 721 can be driven to rotate, and the smoke barrier 41 can be driven to turn over. The connecting rod 721 can also be implemented by other connecting structures, such as a connecting rod assembly, a buckle, etc., as long as the connecting shaft 722 is in transmission connection with the smoke barrier 41, and the rotation of the connecting shaft 722 can drive the smoke barrier 41 to turn over.

The smoke barrier assembly further includes two partition plates 44, each partition plate 44 extends in the front-rear direction and has a bottom located above the air inlet 17, each partition plate 44 corresponds to one end of the baffle structure 42 'in the left-right direction, and when the baffle structure 42' extends between the two partition plates 44, each connecting shaft 722 can pass through the partition plate 44 so as to limit the connecting shaft 722, and the connecting shaft 722 can rotate relative to the partition plates 44. Each of the links 721 is located in a space outside the two partitions 44, the link 721 on the left side is located on the left side of the left partition 44, and the link 721 on the right side is located on the right side of the right partition 44. The provision of the partition 44 prevents possible leakage from both the left and right sides due to the space occupied by the connecting shaft 722.

Referring to fig. 15 to 17, when the range hood is closed, the smoke barrier 41 is vertical, the air inlet 17 is closed, and the baffle structure 42' is horizontal, so that the channel in the air inlet assembly 1 is closed in the front-rear direction, and the left and right ends of the smoke barrier are tightly attached to the partition 44 at the corresponding position, so that the air inlet 17 and the air outlet 5 are isolated. Even if the oil smoke flows backwards from the air outlet 5, the oil smoke can be blocked by the baffle structure 42' and the smoke baffle plate 41, and cannot enter the kitchen.

Referring to fig. 11 to 13, when the range hood is to be opened, the moving mechanism drives the smoke barrier 41 to turn over relative to the air intake assembly 1, the second end 412 of the smoke barrier turns over outwards (forwards), and the barrier 42' turns over synchronously, so that the channel in the air intake assembly 1 is no longer closed, and the oil smoke can flow into the air outlet 5 smoothly after entering from the air inlet 17 and then be discharged.

Thereafter, when the range hood is closed again, the moving mechanism drives the smoke baffle 41 to turn over relative to the air intake assembly 1, the second end 412 turns over backwards, the baffle structure 42' returns to the horizontal state, and the channel in the air intake assembly 1 is closed again in the front-back direction.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion, respectively), i.e., a fluid (gas, liquid or a mixture of both) can flow from the first portion along a flow path or/and be transported to the second portion, and may be a direct communication between the first portion and the second portion, or an indirect communication between the first portion and the second portion via at least one third member, such as a fluid channel, e.g., a pipe, a channel, a conduit, a flow guide, a hole, a groove, or a chamber that allows a fluid to flow therethrough, or a combination thereof.

Claims

1. A range hood comprises an air inlet component (1) and an air outlet (5), wherein the air inlet component (1) comprises a front side wall (11) and a rear side wall (12) which are arranged at intervals in the front-rear direction, and an air inlet (17) is formed in the front side wall (11); range hood still includes keeps off the cigarette board subassembly, keep off the cigarette board subassembly including keeping off cigarette board (41) that can open and close air intake (17), its characterized in that: the smoke baffle assembly (4) further comprises a baffle structure (42; 42 '), when the smoke baffle (41) is in a state of closing the air inlet (17), the baffle structure (42; 42') extends between the front side wall (11) and the rear side wall (12) to isolate the air inlet (17) and the air outlet (5); when the smoke baffle (41) is in a state of opening the air inlet (17), the baffle structure (42; 42') rotates relative to the air inlet assembly (1) to enable the fluid communication between the air inlet (17) and the air outlet (5).

2. The range hood of claim 1, wherein: the baffle structure (42) comprises a first baffle (421) and a second baffle (422), the width of each baffle in the front-back direction is matched with the distance between the front side wall (11) and the rear side wall (12), each baffle is respectively provided with a first end part close to the other baffle and a second end part far away from the other baffle, the first end parts of the first baffle (421) and the second baffle (422) are rotatably connected, and the rotating axes of the first baffle (421) and the second baffle (422) extend along the front-back direction; when the smoke baffle (41) is in a state of closing the air inlet (17), the first baffle (421) and the second baffle (422) are in an unfolded state, and when the smoke baffle (41) is in a state of opening the air inlet (17), the first baffle (421) and the second baffle (422) are folded relatively.

3. The range hood of claim 2, wherein: the smoke barrier (41) has a first end (411) and a second end (412) which are opposite, the smoke baffle plate (41) is rotatably connected with the air inlet component (1) at a position close to the first end part (411), the second end part (412) of the smoke baffle plate (41) is a free end, when the smoke baffle (41) is in a state of closing the air inlet (17), the first end part (411) is higher than the second end part (412), a pressing part (43) extending in a direction away from the second end part (412) is arranged on the first end part (411) of the smoke baffle plate (41), the pressing part (43) is positioned in the air inlet component (1) and can press the baffle structure (42) when the smoke baffle plate (41) is opened so as to fold the baffle structure (42), the baffle structure (42) keeps the unfolding trend, and the baffle structure (42) is not higher than the first end (411) of the smoke baffle plate (41) when unfolded.

4. The range hood of claim 3, wherein: the first baffle (421) and the second baffle (422) are connected through a rotating shaft (423), and a torsion spring (424) is arranged on the rotating shaft (423), so that the first baffle (421) and the second baffle (422) keep the tendency of unfolding.

5. The range hood of claim 2, wherein: the second tip of first baffle (421) rotates with air inlet subassembly (1) to be connected, the second tip of second baffle (422) moves in left and right sides direction, be provided with between the back lateral wall of air inlet subassembly (1) and second baffle (422) and remove the guide structure that leads to the second tip of second baffle (422).

6. The range hood of claim 5, wherein: the guide structure comprises a protrusion (4221) arranged at the second end of the second baffle plate (422) or at a position close to the second end, and a guide groove (121) formed in the rear side wall (12) of the air inlet assembly (1), the guide groove (121) extends in the left-right direction, and the protrusion (4221) can slide along the guide groove (121).

7. The range hood of claim 2, wherein: the air inlet assembly (1) further comprises a left side wall (13) and a right side wall (14), the left side wall (13) is arranged between the left end parts of the front side wall (11) and the rear side wall (12), and the right side wall (14) is arranged between the right end parts of the front side wall (11) and the rear side wall (12); the baffle structures (42) are arranged in two groups from left to right, the second end of the first baffle (421) of the baffle structure (42) on the left side is close to the left side wall (13) of the air inlet assembly (1), the second end of the first baffle (421) of the baffle structure (42) on the right side is close to the right side wall (14) of the air inlet assembly (1), and the two second baffles (422) are positioned between the two first baffles (421); when the baffle structure (42) is unfolded, the second ends of the two second baffles (422) abut against each other.

8. The range hood of claim 1, wherein: the baffle structure (42 ') is a plate with the width matched with the distance between the front side wall (11) and the rear side wall (12) of the air inlet assembly (1), and the baffle structure (42') is rotatably connected with the air inlet assembly (1) and rotates along an axis extending from left to right.

9. The range hood of claim 8, wherein: the range hood further comprises a movement mechanism, the movement mechanism comprises a driving mechanism (71 ') and a transmission mechanism, the transmission mechanism comprises two connecting shafts (722), the two connecting shafts (722) are respectively arranged at the left side and the right side of the baffle structure (42') and extend along the left-right direction, the end part, far away from the baffle structure (42 '), of each connecting shaft (722) is respectively in rotary connection with the corresponding position of the air inlet assembly (1), and the connecting shafts (722) are driven by the driving mechanism (71') to rotate around the axes of the connecting shafts.

10. The range hood of claim 9, wherein: the smoke baffle plate (41) is in transmission connection with the connecting shaft (722), so that the smoke baffle plate (41) opens and closes the air inlet (17) in a turnover mode.

11. The range hood of claim 9, wherein: the smoke baffle plate assembly further comprises two partition plates (44), each partition plate (44) extends in the front-rear direction, the bottom of each partition plate (44) is located above the air inlet (17), each partition plate (44) corresponds to one end portion of the baffle plate structure (42 ') in the left-right direction, and when the smoke baffle plate (41) is in a state of closing the air inlet (17), the left end and the right end of the baffle plate structure (42') are tightly attached to the partition plates (44) in corresponding positions.