CN218442465U - Fume exhauster - Google Patents

Abstract

The utility model belongs to the technical field of kitchen appliances and discloses a range hood. The range hood includes a fuselage and a flap, the fuselage is provided with a smoke inlet; The body is pivotally connected near the front end of the smoke inlet, and the other end of the first plate is fixedly connected with the second plate. The first plate can be turned away from the fuselage to open the smoke inlet. When the flap is in the position of opening the smoke inlet position, the second plate is inclined relative to the first plate in a direction away from the smoke inlet. In the range hood of the present utility model, after the flap is flipped and opened, the second plate is bent toward the outside of the smoke collection chamber 2 relative to the first board, so that the range hood has a larger space for the smoke collection chamber 2; moreover, the second board The space of the second smoke collection chamber is also extended downwards, closer to the lower smoke generating area, the smoke collection ability is stronger, and the oil fume on both sides of the second smoke collection chamber is prevented from escaping due to the accumulation of oil fume near the flap, and the effect of preventing smoke from escaping is better. Good, so as to improve the oil fume purification efficiency of the range hood.

Description

a range hood

technical field

The utility model relates to the technical field of kitchen appliances, in particular to a range hood.

Background technique

A range hood is an electrical appliance used to absorb cooking fumes in the kitchen and discharge them to the outside. There is a fan inside the fuselage of the range hood to absorb the oil fume; in order to enhance the effect of the fan on absorbing the oil fume, some range hoods are equipped with a reversible flip plate on the operation panel to collect the smoke. When the flip plate is flipped open, A smoke collecting cavity is formed under the operation panel, and the negative pressure suction formed by the fan in the smoke collecting cavity effectively concentrates the oil fume above the cooker in the smoke collecting cavity to prevent the oil fume from escaping, thereby enhancing the oil fume purification effect of the range hood. The size of the smoke collection cavity is related to the turning angle of the turning plate. The turning angle of the turning plate is limited, resulting in limited space for the smoke gathering cavity. The fume purification efficiency of the range hood.

Therefore, need a kind of range hood badly to solve the above problems.

Utility model content

The purpose of the utility model is to provide a range hood, which can increase the space of the second smoke collecting chamber and improve the smoke collecting ability of the second smoke collecting chamber, thereby improving the oil fume purification efficiency of the range hood.

For this purpose, the utility model adopts the following technical solutions:

A range hood is provided, comprising:

a fuselage, the fuselage is provided with a smoke inlet;

Turning plate, the turning plate includes a first plate and a second plate, one end of the first plate is pivotally connected to the front end of the fuselage close to the smoke inlet, the other end of the first plate is connected to the The second plate is fixedly connected, and the first plate can be turned away from the fuselage to open the smoke inlet. When the turning plate is in the position to open the smoke inlet, the second plate Relative to the first plate, it is inclined in a direction away from the smoke inlet.

As a preferred structure of the present utility model, the range hood further includes an oil cup, and the oil cup includes an open accommodating cavity. When the flap closes the smoke inlet, the opening is located at the Below the flap, the flap is inclined downward from front to back, so as to drain the oil droplets in the fuselage to the opening.

As a preferred structure of the present invention, when the turnover plate closes the smoke inlet, the first plate is located above the second plate, and the second plate is located above the opening, The first plate and the second plate are arranged at an obtuse angle.

As a preferred structure of the present utility model, the range hood also includes:

A smoke baffle, the smoke baffle is arranged in the fuselage and located above and on the front side of the oil cup, the smoke baffle is inclined downward from front to back, so that the oil droplets on it flow into the stated exposure.

As a preferred structure of the present utility model, the first plate and the second plate have a circular arc transition.

As a preferred structure of the present invention, the first board and the second board are integrally formed.

As a preferred structure of the present invention, when the flap closes the smoke inlet, the width of the flap is the same as the width of the fuselage and larger than the width of the smoke inlet.

As a preferred structure of the present invention, the second plate is provided with a smoke collecting port, and when the flap closes the smoke inlet, the smoke collecting port communicates with the smoke inlet.

As a preferred structure of the present utility model, the range hood also includes:

The range hood also includes a turning plate drive assembly, the turning plate also includes an arc-shaped turning frame and a pivot shaft, one end of the arc-shaped turning frame is connected to the pivot shaft, and the other end is connected to the first plate, The turning plate driving assembly drives the pivot shaft to rotate so that the arc-shaped turning frame drives the first plate to rotate around the pivot shaft.

As a preferred structure of the present utility model, the flip drive assembly includes:

a rotating drive part is arranged in the fuselage, and the rotating drive part is used to output torque;

a first gear connected to the output end of the rotary drive;

The second gear meshes with the first gear, the second gear is connected to the pivot shaft, and is arranged coaxially with the pivot shaft.

As a preferred structure of the present invention, there are two arc-shaped turning frames, and the two arc-shaped turning frames are respectively arranged on both sides of the first plate.

As a preferred structure of the present invention, the fuselage includes a smoke collecting cavity shell and a flue shell which communicate with each other, the smoke collecting cavity shell is arranged at the lower end of the flue shell, and the The smoke-collecting cavity shell protrudes relative to the front end of the flue shell.

As a preferred structure of the present invention, there is a preset distance between the first plate and the front end of the smoke collecting chamber housing.

The beneficial effects of the utility model:

In the range hood provided by the utility model, the flap includes a first plate and a second plate, one end of the first plate is pivotally connected to the front end of the fuselage near the smoke inlet, the other end of the first plate is fixedly connected to the second plate, The first plate can be turned away from the fuselage to open the smoke inlet; when the flip plate is in the position of opening the smoke inlet, the second plate is inclined in a direction away from the smoke inlet relative to the first plate, that is, the second plate Compared with the first plate, it is bent toward the outside of the second smoke collection chamber, so that the cross-sectional width of the second smoke collection chamber is wider, and the range hood has a larger smoke collection chamber two; moreover, the second plate is outside the second smoke collection chamber While bending sideways to increase the width of the second section of the smoke collection chamber, it also extends the second smoke collection chamber downward, closer to the lower smoking area, and has a stronger ability to collect smoke, avoiding the accumulation of oil fume near the flap and causing the second smoke collection chamber The oil fume on both sides escapes, and the anti-runaway effect is better, thereby improving the oil fume purification efficiency of the range hood.

Description of drawings

Fig. 1 is the structural representation of existing range hood with turning plate;

Fig. 2 is a side view of the structure of the range hood provided by the embodiment of the present invention;

Fig. 3 is a schematic structural view of the range hood provided by the embodiment of the present invention in the closed state of the flap;

Fig. 4 is a schematic diagram of the structure of the range hood provided by the embodiment of the present invention when the flap is opened;

Fig. 5 is a side view of the structure of the range hood provided by the embodiment of the present invention in the closed state of the flap;

Fig. 6 is a partially enlarged schematic diagram of part A in Fig. 5;

Fig. 7 is a schematic structural view of a range hood with a smoke opening provided by an embodiment of the present invention;

Fig. 8 is a schematic disassembly diagram of the structure of the range hood provided by the embodiment of the present invention;

Fig. 9 is a partially enlarged schematic diagram of part B in Fig. 8;

Fig. 10 is a side view of the range hood provided by the embodiment of the present invention when the flap is opened.

In the picture:

1. Fuselage; 11. Smoke inlet; 12. Smoke collecting chamber shell; 13. Flue shell; 14. Mounting plate; 15. Baffle; 2. Turning plate; 21. First plate; 22. Second 2nd board; 221, smoke gathering port; 23, arc-shaped overturning frame; 24, pivot shaft; 3, oil cup; 31, accommodating chamber; 4, flap driving assembly; ; 43, the second gear; 5, the smoke baffle; 6, the second smoke cavity;

100, turning plate; 200, gathering smoke cavity one.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail. It can be understood that the specific embodiments described here are only used to explain the utility model, rather than limit the utility model. In addition, it should be noted that, for the convenience of description, only some structures related to the present utility model are shown in the drawings but not all structures.

In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integrate; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "below" a second feature may include direct contact between the first and second features, and may also include the first and second features being in direct contact with each other. The features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "up", "down", "left", "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operations. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

A range hood is an electrical appliance used to absorb and discharge cooking fumes in the kitchen and discharge them to the outside. A fan is arranged inside the fuselage of the range hood for absorbing the oil fume; as shown in Figure 1, in order to enhance the effect of the fan for absorbing the oil fume, some range hoods are provided with a reversible flip plate 100 on the operation panel for collecting the smoke. When the turning plate 100 is flipped open, a smoke collection chamber 200 is formed under the operation panel, and the oil fume above the cooker is effectively concentrated in the smoke collection chamber 200 through the negative pressure suction formed by the fan, so as to avoid escaping, thereby enhancing the safety of the range hood Oil fume purification effect. The size of the cigarette collecting chamber 100 is related to the turning angle of the turning plate 100, as shown in Figure 1, the shaded surface is the cross section of the smoking chamber 1 200 formed by the turning plate 100, and L1 in the figure is the maximum of the smoking chamber 1 200 cross section. Width, when the turning angle of the turning plate is constant, the width of L1 is constant, which determines the size of the smoke chamber-200. The turning angle of the turning plate 100 is limited, resulting in a limited space for the smoke collecting chamber 200, and the oil fume above the cooker accumulates in the vicinity of the turning plate 100, causing smoke to escape from both sides of the collecting smoke chamber 1 200, reducing the oil fume purification efficiency of the range hood. Therefore, the embodiment of the present utility model provides a range hood to solve the above problems.

As shown in FIGS. 2-4 , the range hood of the embodiment of the present invention includes a fuselage 1 and a flap 2 . The fuselage 1 is provided with a smoke inlet 11, and the smoke inlet 11 is used for passing oil fume. The flap 2 includes a first plate 21 and a second plate 22. One end of the first plate 21 is pivotally connected to the front end of the fuselage 1 near the smoke inlet 11. The flap 2 is pivotally connected to the fuselage 1 through the first plate 21 to close the The smoke inlet 11 makes the smoke inlet 11 not exposed, as shown in Figure 3, which is more beautiful and tidy. The other end of the first plate 21 is fixedly connected to the second plate 22, and the first plate 21 can be turned away from the fuselage 1 to open the smoke inlet 11, and become the open smoke collection state, as shown in FIG. 4 . When the flap 2 is in the position of opening the smoke inlet 11, the second plate 22 is inclined towards the direction away from the smoke inlet 11 relative to the first plate 21; as shown in Figure 2, when the flap 2 is flipped open, the The shaded area of is the cross-sectional area of the smoke gathering chamber 2 6 formed by the first plate 21 and the second plate 22, and L2 is the maximum width of the smoke gathering chamber 2 6 section. The second plate 22 is bent toward the outside of the second smoke chamber 6 relative to the first plate 21. Therefore, compared with FIG. The section width of 6 is wider, that is, under the premise of the same turning angle and the same length of the smoke chamber, the shaded area in Figure 2 is larger than that in Figure 1, and the space of the second smoke chamber 6 is larger than that of the first smoke chamber 200; moreover, while the second plate 22 is bent toward the outside of the smoke-collecting chamber 2 6 to increase the cross-sectional width of the smoke-collecting chamber 2 6, it also extends the smoke-collecting chamber 2 6 downward, closer to the lower smoking area , The ability to collect smoke is stronger, avoiding the escape of oil fume caused by the accumulation of oil fume near the flap 2, and the effect of preventing escape of smoke is better, thereby improving the oil fume purification efficiency of the range hood.

As a preferred solution, the range hood also includes an oil cup 3. The oil cup 3 includes an open accommodating cavity 31. When the flap 2 closes the smoke inlet 11, the opening is located under the flap 2, and the flap 2 moves from the front to the The rear is tilted downwards to drain the oil droplets in the fuselage 1 to the opening. When the oil fume enters the interior of the fuselage 1 through the smoke inlet 11, some of the oil fume will be condensed and separated to form oil droplets, and the oil droplets will drop on the flap 2 under the action of gravity. When the flap 2 is in the position to close the smoke inlet 11 At this time, because one end of the turning plate 2 is inclined downward from front to back, the oil droplets will follow the inclined downward turning plate 2 and be drawn to the opening through the second plate 22, and finally enter the accommodating chamber of the oil cup 3 31. The dotted arrows in FIG. 6 indicate the flow path of the oil droplets on the flap 2 .

As a preferred solution, when the flap 2 closes the smoke inlet 11, the first plate 21 is located above the second plate 22, the second plate 22 is located above the opening, and the first plate 21 and the second plate 22 are arranged at an obtuse angle. As shown in Figure 5, when the flap 2 closes the smoke inlet 11, the first plate 21 is inclined downward from front to back, and the second plate 22 is inclined downward from front to rear. The first plate 21 and the second plate 22 Arranged at an obtuse angle, the directions of the arrows in Fig. 5 respectively indicate the front direction and the downward direction of the range hood of this embodiment. The first plate 21 and the second plate 22 are in a concave shape, so that the lower side of the fuselage 1 has a larger space, preventing the user from touching the user's head, and facilitating the user to perform cooking operations; and the fan is formed in the fuselage 1 The negative pressure area is larger, which can absorb and contain more oil fume. Moreover, compared with the horizontal arrangement, the inclined first plate 21 only needs to be rotated by a small angle to reach the working state as shown in FIG. 2 .

As a preferred solution, the range hood also includes a smoke baffle 5, which is arranged in the fuselage 1 and located above and on the front side of the oil cup 3, and the smoke baffle 5 is inclined downward from front to back, so that the upper Oil droplets flow into the opening. The smoke baffle 5 is set at an inclination at a certain angle. The oil fume enters the fuselage 1 from the smoke inlet 11 and continues to flow through the smoke baffle 5. The smoke baffle 5 can separate part of the oil fume and form oil droplets that adhere to the smoke baffle. On board 5, reduce the amount of fumes discharged. After accumulating a certain amount of oil droplets on the smoke baffle 5 , they will drop onto the turnover plate 2 under the action of gravity, and flow into the oil cup 3 along the second plate 22 .

As a preferred solution, the first plate 21 and the second plate 22 have a circular arc transition. The arc transition makes the second plate 22 and the first plate 21 have an arc-shaped bending angle, which reduces the stress concentration of the flap 2 at the connection between the first plate 21 and the second plate 22 and increases the reliability of the second plate 22 , to prevent the flap 2 from being deformed or even damaged. In addition, the arc transition also has the effect of guiding oil droplets. The circular arc transition further increases the diversion effect on the oil droplets, and the oil droplets are more likely to enter the second plate 22 through the smooth circular arc transition, and finally drop into the oil cup 3 at the bottom of the second plate 22 .

Furthermore, the first board 21 and the second board 22 are integrally formed. The connection between the integrally formed first plate 21 and the second plate 22 is relatively reliable, which can prevent the angle between the first plate 21 and the second plate 22 from changing due to the deformation of the turnover plate 2 . The first plate 21 and the second plate 22 can be integrally formed by injection molding, or integrally formed by sheet metal, or processed by glass bending and forming, which is not limited in this embodiment.

As a preferred solution, when the flap 2 closes the smoke inlet 11, the width of the flap 2 is the same as the width of the fuselage 1 and greater than the width of the smoke inlet 11, so that the width of the flap 2 is wider, on the one hand, it can When the flap 2 is opened, the range of the smoke chamber 2 6 is larger. On the other hand, when the flap 2 is closed, the fuselage 1 can be completely covered, so that the outside of the fuselage 1 is smoother and more attractive.

As a preferred solution, the second plate 22 is provided with a smoke collecting port 221 , as shown in FIG. 7 . The smoke collecting port 221 is connected to the smoke inlet 11, because the second plate 22 extends obliquely downward of the range hood, and the smoke collecting port 221 is closer to the smoke generating area below the range hood, so less oily fumes are generated when the user is boiling water, cooking soup, etc. During the cooking work, there is no need to open the flap 2, and the water vapor and oil fume can be sucked into the interior of the fuselage 1 through the smoke collecting port 221 on the second panel 22, which is more convenient to use, saves energy, and avoids the open flap 2 blocking the line of sight Or hit the head; when the user is cooking with a large amount of oil fume, such as stir-frying, he will turn over the flap 2 to meet the needs of oil smoke in different cooking scenarios and with different amounts of oil fume. It not only saves energy, but also makes the operation easier Humanize. The smoke collecting opening 221 is used as a hollow area, which also reduces the weight of the second plate 22, thereby reducing the weight of the turnover panel 2 and making the turnover panel 2 easier to turn over.

As a preferred solution, the range hood further includes a turning plate driving assembly 4, as shown in FIG. 8 and FIG. 9, the turning plate driving assembly 4 is used to drive the turning plate 2 to turn over. The turnover panel 2 also includes an arc-shaped turning frame 23 and a pivot shaft 24. One end of the arc-shaped turning frame 23 is connected to the pivot shaft 24, and the other end is connected to the first plate 21. The turning panel driving assembly 4 drives the pivot shaft 24 to rotate so that The arc turning frame 23 drives the first plate 21 to rotate around the pivot shaft 24 . When the pivot shaft 24 rotates, it will drive the arc-shaped overturning frame 23 to rotate, and the other end of the arc-shaped overturning frame 23 will drive the first plate 21 to overturn. Because the frame body of the arc-shaped turning frame 23 has an arc shape, interference with the first board 21 during the turning process is avoided.

Specifically, the turning plate driving assembly 4 further includes a rotating driving member 41 , a first gear 42 and a second gear 43 . The rotary driving part 41 is arranged in the body 1, and the rotary driving part 41 is used for outputting torque. In order to facilitate the installation of the rotating drive member 41, the range hood of this embodiment is also provided with a mounting plate 14, which is fixedly arranged in the body 1, and the rotating drive member 41 is detachably connected to the mounting plate 14; it should be noted that , in actual installation, in order to save the internal space of the fuselage 1, the rotary driving member 41 can also be directly installed in the shell of the fuselage 1, such as the side of the fuselage 1 and other positions. The first gear 42 is connected to the output end of the rotating driving member 41 , and the output end of the rotating driving member 41 can drive the first gear 42 to rotate. The second gear 43 meshes with the first gear 42, the second gear 43 is connected to the pivot shaft 24, and is coaxially arranged with the pivot shaft 24; therefore, the rotating first gear 42 drives the second gear 43 to rotate, thereby realizing The rotation of the pivot shaft 24 further realizes the turning over of the turning plate 2 by the arc turning frame 23 . Optionally, the rotary driving member 41 can be a motor.

As a preferred solution, two arc-shaped turning frames 23 are provided, and the two arc-shaped turning frames 23 are respectively arranged on both sides of the first plate 21; the turning plate driving assembly 4 is arranged on one side of the turning plate 2 for driving the One end of the connecting shaft 24, therefore, when the pivoting shaft 24 rotates, it can drive the two arc-shaped overturning frames 23 at both ends to rotate simultaneously, thereby applying an overturning moment to both sides of the first plate 21 at the same time, so that the first plate 21 is subjected to The force is more uniform, easy to turn over, and avoids damage caused by uneven force.

It should be noted that the specific structure of the above-mentioned turning plate driving assembly 4 is only an example. In other embodiments, a push rod driven by a motor or a cylinder can also be used to push the first plate 21 and the second plate 22 to realize turning over. Examples are limited.

As a preferred solution, the fuselage 1 includes a smoke collecting cavity shell 12 and a flue shell 13 which are connected to each other, the smoke inlet 11 is arranged on the smoke collecting cavity shell 12, and the smoke collecting cavity shell 12 is set on the flue shell 13, a smoke baffle 5 is arranged in the smoke collecting cavity housing 12, and a fan assembly (not shown in the figure) is arranged in the flue housing 13, and under the action of the fan assembly, oil fume enters through the smoke inlet 11. In the smoke collecting chamber shell 12 , the flow passes through the smoke baffle plate 5 and enters into the flue shell 13 . The smoke collecting cavity shell 12 is protruding from the front end of the flue shell 13, as shown in Figure 10, X1 in the figure is the distance from the smoke collecting cavity shell 12 protruding from the front end of the flue shell 13; the user The flue casing 13 can be packaged inside the cabinet, or a baffle is set in front of the flue casing 13, and the distance X1 from the front end of the flue casing 12 protruding from the smoke collection chamber 13 can be used to install a cabinet or a baffle , to maintain the overall appearance of the range hood.

Furthermore, there is a preset distance between the first plate 21 and the front end of the smoke collecting chamber housing 12 . As shown in Figure 10, X2 in the figure is the preset distance between the first plate 21 and the front end of the smoke collection chamber shell 12, this setting position makes the cross section of the smoke collection chamber 2 after the flap 2 is opened The width L2 is well controlled and will not be too large, and at the same time maintain the distance that the second board 22 will extend downwards from the second board 22; while ensuring the smoke collection ability of the second board 22, the second board 22 will be the most The distance between the front end and the rear end surface of the smoke collecting chamber shell 12 will not be too large. When the smoke collecting chamber shell 12 is installed close to the wall, the thickness between the front end of the second plate 22 and the wall is controlled. distance, to prevent the flap 2 from protruding too much from the front of the smoke collecting cavity housing 12 when the flap 2 is opened to gather smoke, so that the second plate 22 is easy to touch the user's head. Furthermore, in order to close the smoke inlet 11 between the first plate 21 and the front surface of the smoke collecting chamber shell 12 , the smoke collecting chamber shell 12 is further provided with a baffle plate 15 .

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. Various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the utility model shall be included in the protection scope of the claims of the utility model.

Claims (13)

1. A range hood, comprising:

the smoke exhaust ventilator comprises a machine body (1), wherein a smoke inlet (11) is formed in the machine body (1);

turning plate (2), turning plate (2) includes first board (21) and second board (22), first board (21) one end with fuselage (1) is close to the position pin joint of advancing smoke mouth (11) front end, the other end of first board (21) with second board (22) fixed connection, first board (21) can be towards keeping away from the direction upset of fuselage (1) is in order to open advance smoke mouth (11), works as turning plate (2) are in and open when advancing the position of smoke mouth (11), second board (22) are relative first board (21) orientation deviates from the direction slope of advancing smoke mouth (11).

2. A range hood as claimed in claim 1, further comprising an oil cup (3), wherein the oil cup (3) comprises an accommodating cavity (31) with an opening, when the flap (2) closes the smoke inlet (11), the opening is located below the flap (2), the flap (2) is inclined downwards from front to back to guide oil drops in the body (1) to the opening.

3. A range hood according to claim 2, characterized in that when the flap (2) closes the smoke inlet (11), the first plate (21) is located above the second plate (22), the second plate (22) is located above the opening, and the first plate (21) and the second plate (22) are arranged at an obtuse angle.

4. The range hood according to claim 2, further comprising:

keep off cigarette board (5), keep off cigarette board (5) set up in fuselage (1) and be located the top and the front side of oil cup (3), keep off cigarette board (5) by preceding to the downward sloping to make the oil droplet on it flow into uncovered.

5. A range hood according to claim 4, characterized in that the first plate (21) is in circular arc transition with the second plate (22).

6. A range hood according to claim 1, characterized in that the first plate (21) is integrally formed with the second plate (22).

7. A range hood according to any of claims 1-6, characterized in that when the flap (2) closes the smoke inlet (11), the width of the flap (2) is the same as the width of the body (1) and is greater than the width of the smoke inlet (11).

8. A range hood as claimed in any of claims 1 to 6, characterized in that the second plate (22) is provided with a smoke collection opening (221), and when the flap (2) closes the smoke inlet (11), the smoke collection opening (221) is communicated with the smoke inlet (11).

9. A range hood as claimed in any one of claims 1 to 6, further comprising a flap driving assembly (4), wherein the flap (2) further comprises an arc-shaped turning frame (23) and a pivoting shaft (24), one end of the arc-shaped turning frame (23) is connected with the pivoting shaft (24), the other end of the arc-shaped turning frame (23) is connected with the first plate (21), and the flap driving assembly (4) drives the pivoting shaft (24) to rotate so that the arc-shaped turning frame (23) drives the first plate (21) to rotate around the pivoting shaft (24).

10. A range hood as claimed in claim 9, characterized in that said flap drive assembly (4) comprises:

the rotary driving piece (41) is arranged in the machine body (1), and the rotary driving piece (41) is used for outputting torque;

a first gear (42) connected to an output end of the rotary drive (41);

and the second gear (43) is meshed with the first gear (42), and the second gear (43) is connected to the pivot shaft (24) and is coaxially arranged with the pivot shaft (24).

11. A range hood as claimed in claim 9, wherein there are two of said arc-shaped roll-over stands (23), two of said arc-shaped roll-over stands (23) being disposed on either side of said first panel (21).

12. A range hood as claimed in any one of claims 1 to 6, wherein the body (1) comprises a smoke collection chamber housing (12) and a flue housing (13) which are communicated with each other, the smoke collection chamber housing (12) is arranged at the lower end of the flue housing (13), and the smoke collection chamber housing (12) is arranged in a protruding manner relative to the front end of the flue housing (13).

13. A hood according to claim 12, characterized in that there is a preset distance between said first plate (21) and the front end face of said collecting chamber housing (12).

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