CN221172344U - Fume exhaust fan and fume collecting hood thereof - Google Patents

Abstract

The application relates to a range hood and a fume collecting hood thereof. The horizontal smoke gathering part is provided with a smoke gathering cavity. The horizontal smoke gathering part comprises a top plate, a bottom plate and a back plate, wherein the bottom plate is arranged opposite to the top plate at intervals, and the back plate is connected with the top plate. The inner wall of the top plate is provided with a guide surface, and the rear side of the guide surface is lower than the front side of the guide surface. The bottom plate is provided with a plurality of smoke inlet holes communicated with the smoke collecting cavity, the distance between the rear side of the guide surface and the back plate is set to be a first distance S1, the distance between the smoke inlet hole closest to the back plate and the back plate is set to be a second distance S2, and the first distance S1 is smaller than the second distance S2. Thus, the greasy dirt on the guiding surface slides down to the rear side of the guiding surface under the action of gravity. And because the first interval is smaller than the second interval, the greasy dirt that drops downwards behind the guide surface just can not drip into the cigarette hole, can not pass into the cigarette hole and fall on the kitchen face and cause the pollution promptly for can effectively overcome oil leak pollution defect.

Description

Fume exhaust fan and fume collecting hood thereof

Technical Field

The application relates to the technical field of kitchen appliances, in particular to a range hood and a fume collecting hood thereof.

Background

The range hood has the functions of exhausting the oil smoke gas generated in the kitchen cooking process out of the room, purifying the air environment of the kitchen and reducing the harm of the oil smoke to human bodies. The types of the range hoods are more, and the range hoods comprise side-suction range hoods, middle island type range hoods, 7-shaped range hoods and the like. The range hood comprises a fume collecting hood, a fan assembly connected above the fume collecting hood and an oil cup connected below the fume collecting hood. In general, the fume collecting hood is provided with a top fume sucking port and/or a side fume sucking port, and when the fume exhauster works, fume firstly enters the fume collecting hood through the fume sucking port, then enters the blower and finally is conveyed into the public exhaust channel. The oil fume enters the fume collecting hood and contacts with the inner wall of the fume collecting hood to condense and form oil stain, and when the oil stain is accumulated to a certain amount, the oil stain may drop onto the kitchen surface through the oil mesh hole under the fume collecting hood, so that oil leakage and pollution are caused.

Disclosure of Invention

The first technical problem to be solved by the application is to provide a fume collecting hood of a range hood, which can effectively reduce the oil leakage pollution phenomenon.

The second technical problem to be solved by the application is to provide a range hood which can effectively reduce the oil leakage pollution phenomenon.

The first technical problem is solved by the following technical scheme:

A fume collecting hood of a range hood, the fume collecting hood of the range hood comprising: the horizontal tobacco gathering part is provided with a tobacco gathering cavity;

The horizontal smoke collecting part comprises a top plate, a bottom plate and a back plate, wherein the bottom plate is arranged opposite to the top plate at intervals, the back plate is connected with the top plate, a guide surface is arranged on the inner wall of the top plate, and the rear side of the guide surface is lower than the front side of the guide surface; the bottom plate is provided with a plurality of smoke inlet holes which are communicated with the smoke collecting cavity and are arranged corresponding to the guide surface, the distance between the rear side of the guide surface and the back plate is set to be a first distance, the distance between the wall of the smoke inlet hole closest to the back plate and the back plate is set to be a second distance, and the first distance is smaller than the second distance.

Compared with the background technology, the fume collecting hood of the range hood has the following beneficial effects:

The fume collecting hood of the range hood enters the fume collecting cavity through the fume inlet hole to contact the guide surface, oil stains are formed on the guide surface by condensation, and the oil stains on the guide surface slide to the rear side of the guide surface along the trend under the action of gravity because the rear side of the guide surface is lower than the front side of the guide surface. And because the first interval is smaller than the second interval, the greasy dirt that drops downwards behind the guide surface just can not drip into the cigarette hole, can not pass into the cigarette hole and fall on the kitchen face and cause the pollution promptly for can effectively overcome oil leak pollution defect.

In one embodiment, a distance between the front side of the guide surface and the back plate is set to be a third distance, a distance between a wall of the smoke inlet hole farthest from the back plate and the back plate is set to be a fourth distance, and the third distance is greater than or equal to the fourth distance.

In one embodiment, the top plate is integrally formed by stamping, injection molding, die casting or forging to obtain the guide surface; or the inner wall of the top plate is provided with a guide piece, and the guide surface is formed on the guide piece.

In one embodiment, the top plate is provided with a first pressing surface protruding towards the inside of the smoke collecting cavity, the first pressing surface comprises a guide surface and a transition surface connected with the guide surface, and the guide surface and the transition surface are arranged at an included angle.

In one embodiment, the guide surface forms a first angle a with the horizontal plane, and the first angle a is set to be 4-10 degrees; and/or, the transition surface and the horizontal surface form a second included angle b, and the second included angle b is set to be 15-60 degrees.

In one embodiment, the bottom plate is provided with two smoke inlet parts which are arranged at intervals along the left-right direction, and each smoke inlet part is provided with a plurality of smoke inlet holes; the number of the guide surfaces is two, and each guide surface is arranged corresponding to each smoke inlet part.

In one embodiment, the horizontal smoke collecting part further comprises a left panel, a right panel and a first front panel, wherein the left panel and the right panel are oppositely arranged at intervals, the first front panel is oppositely arranged with the back panel, the left panel is respectively connected with the first front panel and the back panel, and the right panel is respectively connected with the first front panel and the back panel; the distance between the left side of the guide surface positioned on the left side and the left panel is smaller than or equal to the minimum distance between the smoke inlet hole wall and the left panel; the distance between the right side of the guide surface and the right panel is smaller than or equal to the minimum distance between the smoke inlet hole wall and the right panel.

In one embodiment, the fume collecting hood further comprises a vertical fume collecting part connected with the horizontal fume collecting part, the vertical fume collecting part comprises a second front panel, and the second front panel is connected with the bottom plate through an arc transition part.

The second technical problem is solved by the following technical scheme:

A range hood comprises the fume collecting hood.

In one embodiment, the range hood includes a bellows disposed above the hood.

Compared with the background technology, the range hood provided by the application has the beneficial effects that:

According to the range hood, the oil smoke entering the smoke collecting cavity through the smoke inlet hole contacts the guide surface, oil stains are formed on the guide surface by condensation, and the oil stains on the guide surface slide to the rear side of the guide surface along the trend under the action of gravity because the rear side of the guide surface is lower than the front side of the guide surface. And because the first interval is smaller than the second interval, the greasy dirt that drops downwards behind the guide surface just can not drip into the cigarette hole, can not pass into the cigarette hole and fall on the kitchen face and cause the pollution promptly for can effectively overcome oil leak pollution defect.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a block diagram of a range hood according to an embodiment of the present application.

Fig. 2 is another view block diagram of the structure shown in fig. 1.

Fig. 3 is a cross-sectional view of the structure shown in fig. 1.

Fig. 4 is an enlarged structural view of fig. 3 at a.

Fig. 5 is another view block diagram of the structure shown in fig. 3.

Fig. 6 is an enlarged structural view of fig. 5 at B.

Fig. 7 is a view of still another view of the structure of fig. 1.

Reference numerals:

10. A fume collecting hood; 11. a horizontal smoke gathering part; 1101. a smoke collecting cavity; 111. a top plate; 1111. a guide surface; 11111. a rear side; 11112. a front side; 1112. a transition surface; 111a, a first press surface; 112. a bottom plate; 1121. a smoke inlet part; 1122. a smoke inlet hole; 1123. an oil blocking convex edge; 1124. a second press surface; 113. a back plate; 114. a left panel; 115. a right panel; 116. a first front panel; 117. a decorative plate; 12. a vertical smoke gathering part; 121. a second front panel; 122. an arc-shaped transition portion; 20. a wind box; 30. an oil cup.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

Referring to fig. 1 to 4, fig. 1 shows a structure diagram of a range hood according to an embodiment of the present application. Fig. 2 shows another view block diagram of the structure shown in fig. 1. Fig. 3 shows a cross-sectional view of the structure shown in fig. 1. Fig. 4 shows an enlarged structural view of fig. 3 at a. The fume collecting hood 10 of the range hood provided by the embodiment of the application comprises: a horizontal smoke gathering part 11. The horizontal smoke gathering portion 11 is formed with a smoke gathering chamber 1101. The horizontal smoke collecting part 11 includes a top plate 111, a bottom plate 112 disposed opposite to the top plate 111 at a distance from each other, and a back plate 113 connected to the top plate 111. The top plate 111 has a guide surface 1111 provided on an inner wall thereof, and a rear side 11111 of the guide surface 1111 is lower than a front side 11112 of the guide surface 1111.

Referring to fig. 4, a plurality of smoke inlet holes 1122 which are communicated with the smoke collecting cavity 1101 and are arranged corresponding to the guiding surface 1111 are arranged on the bottom plate 112, the distance between the rear side of the guiding surface 1111 and the back plate 113 is set to be a first distance S1, the distance between the wall of the smoke inlet hole 1122 closest to the back plate 113 and the back plate 113 is set to be a second distance S2, and the first distance S1 is smaller than the second distance S2.

It should be noted that the rear side 11111 of the guide surface 1111 is lower than the front side 11112 of the guide surface 1111, and means that the range hood is mounted in a normal posture in a use environment, for example, on a kitchen wall, the ground is selected as a reference horizontal plane, and the distance between the rear side 11111 of the guide surface 1111 and the reference horizontal plane, that is, the height position of the rear side of the guide surface 1111 relative to the ground, is lower than the distance between the front side 11112 of the guide surface 1111 and the reference horizontal plane, that is, the height position of the front side of the guide surface 1111 relative to the ground.

The guide surface 1111 in this embodiment may be a flat surface or a curved surface. Wherein curved surfaces include, but are not limited to, curved surfaces, fold line surfaces, and other irregularly shaped surfaces.

The fume collecting hood 10 of the fume extractor enters the fume collecting cavity 1101 through the fume inlet 1122 to contact the guiding surface 1111, and is condensed to form oil stain on the guiding surface 1111, and the oil stain on the guiding surface 1111 slides down to the back side of the guiding surface 1111 under the action of gravity due to the back side 11111 of the guiding surface 1111 being lower than the front side 11112 of the guiding surface 1111. And because the first interval is smaller than the second interval, the greasy dirt that drops downwards behind the guide surface 1111 will not drip into the smoke inlet 1122, namely will not pass through the smoke inlet 1122 and drop to the kitchen surface and cause pollution, make can overcome the oil leak pollution defect effectively.

Referring to FIG. 4, in one embodiment, the rear side 11111 of the leading surface 1111 may have a first projection in a vertical direction on the base plate 112, including but not limited to a location on the base plate 112 proximate to the back plate 113. As such, oil that falls downward from the rear side of the guide surface 1111 will fall to the first projected location on the base plate 112 and flow back along the base plate 112 until falling into the oil cup 30.

Referring to fig. 2, in some embodiments, the shape of the smoke inlet 1122 includes, but is not limited to, regular shapes such as circular, oval, waist-shaped, polygonal, etc. and other irregular shapes, and can be flexibly adjusted and set according to actual needs, which is not limited herein. In this embodiment, the smoke inlet 1122 is, for example, a waist-shaped hole, and is sequentially arranged on the bottom plate 112 at intervals.

In some embodiments, in order to reduce the leakage of the oil stain on the inner wall of the bottom plate 112 from the smoke inlet 1122 to the cooking surface, the wall of each smoke inlet 1122 is provided with an oil blocking convex edge 1123 in a surrounding manner, and the bottom plate 112 is provided with an inclined surface inclined from front to back downwards, and the oil stain on the inner wall of the bottom plate 112 is blocked by the oil blocking convex edges 1123, so that the oil stain on the inner wall of the bottom plate 112 flows backwards to the second front panel 121 and flows into the oil cup 30 through the second front panel 121.

It should be noted that, the "oil blocking flange 1123" may be a part of the bottom plate 112, that is, the "oil blocking flange 1123" and the other part of the bottom plate 112 "are integrally formed; or a separate component which is separable from the other part of the bottom plate 112, namely the oil baffle flange 1123 can be independently manufactured and then combined with the other part of the bottom plate 112 into a whole.

Referring to fig. 4, in one embodiment, the distance between the front side of the guiding surface 1111 and the back plate 113 is set to be the third distance, and the distance between the wall of the smoke inlet 1122 furthest from the back plate 113 and the back plate 113 is set to be the fourth distance. The third pitch is greater than or equal to the fourth pitch. In this way, the portion of the soot entering from the soot inlet 1122, which is sucked out of the bellows 20, will contact the guide surface 111 as much as possible and flow under the guidance of the guide surface 1111, and the greasy dirt on the guide surface 1111 will flow backward and be discharged into the oil cup 30, since the guide surface 1111 can cover the entire soot inlet 1122, the risk of the greasy dirt falling directly down to the soot inlet 1122 to pollute the cooking surface can be reduced.

In this embodiment, the third pitch and the fourth pitch are equal, for example, as shown in S3 in fig. 4.

Of course, in some alternatives, the third pitch is less than the fourth pitch.

In one embodiment, top plate 111 includes, but is not limited to, guide surface 1111 formed by stamping, injection molding, die casting, or forging.

Of course, as an alternative, a guide member is provided on the inner wall of the top plate 111, and the guide surface 1111 is formed on the guide member. The guide member includes, but is not limited to, bonding, welding, clamping, fastening with pins, rivets, screws, etc. on the inner wall of the top plate 111.

Referring to fig. 4-6, fig. 5 illustrates another perspective block diagram of the structure shown in fig. 3. Fig. 6 shows an enlarged structural view of fig. 5 at B. In one embodiment, the top plate 111 is provided with a first profiling surface 111a protruding towards the inside of the horizontal smoke gathering section 11. The first profiling surface 111a comprises a guiding surface 1111 and a transition surface 1112 connected to the guiding surface 1111. The guide surface 1111 is disposed at an angle to the transition surface 1112.

Referring to fig. 4, in one embodiment, the guiding surface 1111 forms a first angle a with respect to the horizontal plane, and the first angle a is set to be 4 ° to 30 °.

For the way of obtaining the guiding surface 1111 by the profiling process, the first included angle a is arranged at 4 ° to 10 °, so that on one hand, the first included angle a is large enough, and the better oil guiding effect is achieved, and the weakening of the oil guiding effect is prevented when the first included angle a is smaller than 4 °; on the other hand, the first included angle a is not too large, so that the pressing process can be implemented, and the fact that the pressing process is difficult to implement due to the fact that the first included angle a is too large is avoided.

Further, as for the manner in which the guide is provided on the inner wall of the top plate 111 and the guide surface 1111 is provided on the guide, the first included angle a is set to any value including, but not limited to, 4 ° to 30 °. On the one hand, the first included angle a is large enough, so that a good oil guiding effect is achieved, and the oil guiding effect is prevented from weakening when the first included angle a is smaller than 4 degrees; on the other hand, the first included angle a is not too large, the smoke inlet resistance is small, the smoke inlet is not influenced, and the smoke inlet effect can be prevented from being seriously influenced by the sharp increase of the smoke inlet resistance when the first included angle a is larger than 30 degrees.

Of course, as some alternatives, the first included angle a may be set to any angle other than 4 ° to 30 ° according to actual requirements.

Referring to fig. 4, in one embodiment, the transition surface 1112 forms a second angle b with the horizontal plane, and the second angle b is, for example, set to 0 ° to 90 °, and specifically, for example, set to 15 ° to 60 °.

The second included angle b is specifically set to be smaller than 60 ° for example, so that the profiling process can be smoothly implemented, and the construction difficulty and cost are reduced.

In addition, whether the guide surface 1111 is obtained by the profiling process or the guide surface 1111 is provided on the inner wall of the top plate 111, the second angle b is not smaller than 15 ° and the concave surface having a large area is formed on the top plate 111 when the second angle b is smaller than 15 ° is prevented from being reduced in appearance, and in addition, the smoke intake resistance of the smoke intake holes 1122 is prevented from being increased to affect the smoke sucking effect.

Referring to fig. 1, 2 and 7, in one embodiment, two smoke inlet portions 1121 are disposed on the bottom plate 112 at intervals along the left-right direction. Each smoke inlet 1121 is provided with a plurality of smoke inlet 1122. There are two guide surfaces 1111, and each guide surface 1111 is disposed corresponding to each smoke inlet portion 1121. Thus, the number of smoke inlet portions 1121 increases, and the smoke sucking effect can be improved. In addition, the two smoke inlet portions 1121 are respectively provided with the guide surfaces 1111 corresponding to the positions, so that the problem of pollution to the cooking surface caused by oil leakage can be prevented.

Referring to fig. 1, 2 and 7, in some embodiments, the horizontal smoke collecting portion 11 further includes a left panel 114 and a right panel 115 disposed opposite to each other at a distance, and a first front panel 116 disposed opposite to the back panel 113. The left panel 114 is connected to the first front panel 116 and the back panel 113, respectively, and the right panel 115 is connected to the first front panel 116 and the back panel 113, respectively. The distance between the left side of the guiding surface 1111 on the left side and the left panel 114 is less than or equal to the minimum distance between the wall of the smoke inlet 1122 and the left panel 114; the distance between the right side of the guide surface 1111 on the right side and the right panel 115 is less than or equal to the minimum distance between the wall of the smoke inlet 1122 and the right panel 115. Furthermore, the right side of the guide surface 1111 on the left side is close to the bellows 20, i.e., the distance from the bellows 20 is controlled to be, for example, within 5cm, specifically, for example, 3cm or 1cm, and even directly interfaces with the left side of the bellows 20. In addition, the left side of the guide surface 1111 on the right side is close to the bellows 20, i.e., the distance from the bellows 20 is controlled to be, for example, within 5cm, specifically, for example, 3cm or 1cm, and even directly interfaces with the right side of the bellows 20.

Referring to fig. 2 and 7, in one embodiment, the distance between the left side of the guiding surface 1111 and the left panel 114 and the distance between the right side of the guiding surface 1111 and the right panel 115 are the same, as shown in S4 in fig. 7. The minimum distance between the wall of the smoke inlet 1122 and the left panel 114 and the minimum distance between the wall of the smoke inlet 1122 and the right panel 115 are the same, as shown in S5 in fig. 2, for example. Wherein S4 is less than or equal to S5. In this way, the portion of the soot sucked out of the bellows 20 from the smoke inlet 1122 can be advantageously contacted with the guide surface 111 as much as possible, and the soot on the guide surface 1111 flows back and is discharged into the oil cup 30 under the guide of the guide surface 1111, and the guide surface 1111 can cover as many smoke inlet 1122 as possible, so that the risk of the soot falling down directly to the smoke inlet 1122 from above the smoke inlet 1122 far from the bellows to pollute the cooking surface can be reduced.

Referring to fig. 1, 2 and 7, in one embodiment, the hood 10 further includes a vertical smoke gathering portion 12 connected to the horizontal smoke gathering portion 11. The vertical smoke gathering portion 12 includes a second front panel 121, the second front panel 121 being connected to the base 112 by an arcuate transition 122. Thus, the oil dirt dropped to the rear side of the bottom plate 112 flows to the second front panel 121 through the arc-shaped transition part 122, and the arc-shaped transition part 122 can enable the oil dirt to flow smoothly and reliably, so that the oil guiding effect is good.

Referring to fig. 4 and 6, in one embodiment, the bottom plate 112 is provided with a second profiling surface 1124 protruding toward the inside of the horizontal smoke collecting portion 11. The second profiling surface 1124 includes a smoke inlet 1121. The included angle between the smoke inlet 1121 and the horizontal plane is larger than the included angle between other parts of the bottom plate 112 and the horizontal plane, and the oil smoke entering the smoke collecting cavity 1101 blows to the guide surface 1111, so that the oil stain on the guide surface 1111 is pushed to move towards the rear side of the guide surface 1111. In addition, the second profiling surface 1124 is formed with a concave portion to play a role in gathering smoke, which is beneficial to improving the suction effect.

Referring to fig. 6, in one embodiment, a decorative board 117 or other functional boards may be disposed on the outer wall of the bottom board 112 and the outer wall of the second front panel 121, respectively, according to practical requirements. The decorative plate 117 includes, but is not limited to, tempered glass, carbon steel glass, common glass or a display screen, and can improve the aesthetic appearance of the product and protect the product.

Referring to fig. 1-4, in one embodiment, a range hood includes a hood 10 according to any of the embodiments described above.

In the above-mentioned range hood, the oil smoke entering the smoke collecting cavity 1101 through the smoke inlet 1122 contacts the guiding surface 1111, and is condensed on the guiding surface 1111 to form oil dirt, and the rear side 11111 of the guiding surface 1111 is lower than the front side 11112 of the guiding surface 1111, so that the oil dirt on the guiding surface 1111 slides down to the rear side of the guiding surface 1111 under the action of gravity. And because the first interval is smaller than the second interval, the greasy dirt that drops downwards behind the guide surface 1111 will not drip into the smoke inlet 1122, namely will not pass through the smoke inlet 1122 and drop to the kitchen surface and cause pollution, make can overcome the oil leak pollution defect effectively.

In one embodiment, the range hood includes a bellows 20 disposed above the hood 10.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A fume collection hood (10) of a range hood, wherein the fume collection hood (10) of the range hood comprises: a horizontal smoke gathering part (11), wherein a smoke gathering cavity (1101) is formed on the horizontal smoke gathering part (11);

The horizontal smoke collecting part (11) comprises a top plate (111), a bottom plate (112) arranged opposite to the top plate (111) at intervals and a back plate (113) connected with the top plate (111), a guide surface (1111) is arranged on the inner wall of the top plate (111), and the rear side (11111) of the guide surface (1111) is lower than the front side (11112) of the guide surface (1111); the bottom plate (112) is provided with a plurality of smoke inlet holes (1122) which are communicated with the smoke collecting cavity (1101) and are correspondingly arranged on the guide surface (1111), the distance between the rear side (11111) of the guide surface (1111) and the back plate (113) is set to be a first distance, the distance between the wall of the smoke inlet hole (1122) closest to the back plate (113) and the back plate (113) is set to be a second distance, and the first distance is smaller than the second distance.

2. The smoke collecting hood (10) of a range hood according to claim 1, wherein the distance between the front side (11112) of the guide surface (1111) and the back plate (113) is set to a third distance, and the distance between the wall of the smoke inlet hole (1122) furthest from the back plate (113) and the back plate (113) is set to a fourth distance, and the third distance is greater than or equal to the fourth distance.

3. The fume collecting hood (10) of a range hood according to claim 1, characterized in that the top plate (111) is integrally formed by stamping, injection molding, die casting or forging to obtain the guide surface (1111); or a guide member is provided on the inner wall of the top plate (111), and the guide surface (1111) is formed on the guide member.

4. The smoke collecting hood (10) of a range hood according to claim 1, characterized in that the top plate (111) is provided with a first press surface (111 a) protruding towards the interior of the smoke collecting cavity (1101), the first press surface (111 a) comprises the guide surface (1111) and a transition surface (1112) connected with the guide surface (1111), and the guide surface (1111) is arranged at an included angle with the transition surface (1112).

5. The hood (10) of a range hood according to claim 4, wherein the guiding surface (1111) forms a first angle a with the horizontal, the first angle a being set to 4 ° to 10 °; and/or the transition surface (1112) forms a second included angle b with the horizontal plane, the second included angle b being set to 15-60 °.

6. The smoke collecting hood (10) of a range hood according to claim 1, wherein two smoke inlet parts (1121) are arranged on the bottom plate (112) at intervals along the left-right direction, and a plurality of smoke inlet holes (1122) are arranged on each smoke inlet part (1121); the number of the guide surfaces (1111) is two, and each guide surface (1111) is arranged corresponding to each smoke inlet portion (1121).

7. The smoke collecting hood (10) of a range hood according to claim 6, wherein said horizontal smoke collecting portion (11) further comprises a left panel (114) and a right panel (115) arranged at opposite intervals, and a first front panel (116) arranged opposite to a back panel (113), said left panel (114) being connected to said first front panel (116) and said back panel (113), respectively, said right panel (115) being connected to said first front panel (116) and said back panel (113), respectively; the distance between the left side of the guiding surface (1111) on the left side and the left panel (114) is smaller than or equal to the minimum distance between the wall of the smoke inlet hole (1122) and the left panel (114); the distance between the right side of the guide surface (1111) and the right panel (115) is smaller than or equal to the minimum distance between the wall of the smoke inlet hole (1122) and the right panel (115).

8. The fume collecting hood (10) according to any one of claims 1 to 7, wherein the fume collecting hood (10) further comprises a vertical fume collecting portion (12) connected to the horizontal fume collecting portion (11), the vertical fume collecting portion (12) comprises a second front panel (121), and the second front panel (121) is connected to the bottom plate (112) through an arc-shaped transition portion (122).

9. A range hood, characterized in that it comprises a fume collecting hood (10) according to any one of claims 1 to 8.

10. A range hood according to claim 9, characterized in that the range hood comprises a bellows (20) arranged above the fume collecting hood (10).