Smoke collecting assembly and range hood

Abstract

The utility model provides a smoke collection subassembly and range hood, including first main part and second main part, first main part encloses to form first smoke collection chamber, second main part encloses to form second smoke collection chamber that is communicated with first smoke collection chamber, second smoke collection chamber is located first smoke collection chamber top and protrudes outward relative to first smoke collection chamber, the second main body is provided with a top body and a bottom body, the bottom body is stretched towards the top body to form a stretching cavity with a top wall and a side wall, a first distance H1 exists between the top wall and the bottom body and a second distance H2 exists between the top body and the bottom body on the vertical section of the cut stretching cavity, and H1 / H2 is larger than or equal to 1 / 2 and smaller than or equal to 5 / 6. According to the smoke collecting assembly, due to the fact that the bottom body stretches towards the top body to form the stretching cavity communicated with the second smoke collecting cavity, originally dissipated oil smoke can enter the second smoke collecting cavity through the stretching cavity, H1 / H2 is larger than or equal to 1 / 2 and smaller than or equal to 5 / 6, the stretching cavity can change the path of the dissipated oil smoke as much as possible, and therefore the smoke is effectively collected, and the smoke collecting effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to range hood technical field, specifically, it relates to a smoke collecting assembly and range hood. BACKGROUND

[0002] With the improvement of people's life quality, the requirement of kitchen cooking environment is also increasing. The range hood has become one of the indispensable kitchen household appliances in modern family. The range hood is driven by the motor to rotate the impeller at high speed, forming a negative pressure area near the smoke collecting cavity, and sucking the oil fume into the body and discharging it outside.

[0003] The existing range hood includes the upper smoke collecting cavity and the lower smoke collecting cavity, the upper smoke collecting cavity and the lower smoke collecting cavity are connected into the 7-shaped, and in order to reduce the range hood to occupy more kitchen space, the depth of the upper smoke collecting cavity is much smaller than the depth of the lower smoke collecting cavity, forming the ultra-thin 7-shaped range hood, the ultra-thin 7-shaped range hood in the process of working, because its upper smoke collecting cavity is relatively narrow and small, a large amount of oil fume is easy to diffuse through the cavity wall of the upper smoke collecting cavity, causing the oil fume to escape, resulting in that the oil fume cannot be fully absorbed, and the ideal smoke absorption effect cannot be achieved. SUMMARY

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the utility model, a smoke collecting assembly is provided, and the technical scheme is as follows.

[0005] The smoke collecting assembly includes a first body and a second body, the first body is enclosed to form a first smoke collecting cavity, the second body is enclosed to form a second smoke collecting cavity which is communicated with the first smoke collecting cavity, the second smoke collecting cavity is located above the first smoke collecting cavity and protrudes outward relative to the first smoke collecting cavity, wherein the second body has a top body and a bottom body, the bottom body is stretched to the top body direction to form a stretching cavity with a top wall and a side wall, on the vertical section of the stretching cavity, the first distance H1 is between the top wall and the bottom body, the second distance H2 is between the top body and the bottom body, and 1 / 2≤H1 / H2≤5 / 6.

[0006] The smoke collecting assembly of the utility model, because the bottom body is stretched to the top body direction to form the stretching cavity which is communicated with the second smoke collecting cavity, the originally escaped oil fume can enter the second smoke collecting cavity through the stretching cavity, and on the vertical section of the stretching cavity, the first distance H1 is between the top wall of the stretching cavity and the bottom body, the second distance H2 is between the top body and the bottom body, and 1 / 2≤H1 / H2≤5 / 6, the stretching cavity can change the path of the escaped oil fume as much as possible, thereby effectively collecting smoke and improving the smoke collecting effect.

[0007] Exemplarily, the top wall has a first angle a with the horizontal plane, 0°≤a≤15°. The first angle a is set in this range, which can effectively guide the oil fume rising to the top wall to the below, so as to facilitate the oil fume to flow to the second smoke collecting cavity in the stretching cavity, and improve the smoke collecting effect and the oil fume absorption rate.

[0008] Exemplarily, the side wall includes a first side wall and a second side wall, the first side wall is opposite to the second side wall, the first side wall is closer to the first smoke collecting cavity than the second side wall, the first side wall is provided with an air inlet, and the stretching cavity is connected with the second smoke collecting cavity through the air inlet. In this way, the oil fume entering the stretching cavity can rise to the top wall and then return to the second smoke collecting cavity through the air inlet, or directly flow to the second smoke collecting cavity through the air inlet, and the air inlet is closer to the first smoke collecting cavity, so that the oil fume can be quickly sucked to the outdoor through the second smoke collecting cavity or the first smoke collecting cavity, and the oil fume absorption rate is further improved.

[0009] Exemplarily, the first side wall has a second angle b with the horizontal plane, 30°≤b≤50°. The second angle b is set in this range, which can effectively absorb the oil fume rising to the first side wall and the oil fume revolving in the stretching cavity into the second smoke collecting cavity through the air inlet, and improve the smoke collecting effect and the oil fume absorption rate.

[0010] Exemplarily, the second side wall has a third angle g with the vertical plane, 10°≤g≤30°. The third angle g is set in this range, which can effectively guide the oil fume rising to the second side wall to the first side wall, facilitate the oil fume to be absorbed by the air inlet, and ensure that part of the oil fume not absorbed can revolve in the stretching cavity to be absorbed by the air inlet, so as to improve the smoke collecting effect and the oil fume absorption rate.

[0011] Exemplarily, the first side wall is connected with the top wall through a first arc-shaped part. In this way, the obstruction encountered by the oil fume when revolving in the stretching cavity is reduced, and the problem of the oil fume escaping from the stretching cavity is avoided.

[0012] Exemplarily, the second side wall is connected with the top wall through a second arc-shaped part. In this way, the obstruction encountered by the oil fume when revolving in the stretching cavity is reduced, and the problem of the oil fume escaping from the stretching cavity is avoided.

[0013] Exemplarily, a central angle of the first arc-shaped part is smaller than a central angle of the second arc-shaped part. In this way, the oil fume rising to the second side wall can be effectively guided to the second side wall, the obstruction encountered by the oil fume when revolving in the stretching cavity is reduced, and the smoke collecting effect and the oil fume absorption rate are improved.

[0014] Exemplarily, the side wall further comprises two oppositely arranged third side walls, the third side walls are connected between the first side wall and the second side wall, and the third side wall has a fourth angle θ with the vertical plane, 0°≤θ≤20°. The fourth angle θ is arranged in the range, which can effectively guide the oil fume in the stretching cavity to the air inlet and flow to the second smoke collecting cavity through the air inlet, and improve the smoke collecting effect and the oil fume absorption rate.

[0015] According to another aspect of the present application, there is provided an extractor hood comprising a fan assembly and a smoke collecting assembly as described above, the smoke collecting assembly being arranged below the fan assembly. Since the smoke collecting assembly as described above has the above-mentioned advantageous effects, the extractor hood comprising the smoke collecting assembly as described above also has the above-mentioned advantageous effects, which will not be repeated here.

[0016] A series of simplified forms are introduced in the utility model content, which will be further described in detail in the specific embodiment part. The utility model content part does not mean trying to limit the key features and necessary technical features of the claimed technical solution, and even less means trying to determine the protection scope of the claimed technical solution.

[0017] The advantages and features of the present application will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The following drawings of the present application are hereby incorporated as part of the present application for understanding the present application. The embodiments of the present application and the description thereof shown in the drawings are used to explain the principles of the present application. In the drawings,

[0019] Figure 1 It is a perspective view of the smoke collecting assembly of one exemplary embodiment of the present application;

[0020] Figure 2 It is a front view of the smoke collecting assembly in Figure 1

[0021] Figure 3 It is an enlarged view of A part in Figure 2

[0022] Figure 4 It is a perspective view of the extractor hood of one exemplary embodiment of the present application;

[0023] Figure 5 It is a partial sectional view of the extractor hood in Figure 4

[0024] It is an enlarged view of B part in Figure 6 Figure 5

[0025] Figure 7 Figure 1 ​​​​​Figure 6 is a bottom view of the stretching cavity in Figure 5.

[0026] Wherein, the above figures include the following reference signs:

[0027] 1. A range hood; 10. A smoke collecting assembly; 110. A first main body; 111. A first smoke collecting cavity; 112. A second air inlet; 120. A second main body; 121. A second smoke collecting cavity; 122. A top body; 123. A bottom body; 1231. A top wall; 1232. A side wall; 1232a. A first side wall; 1232b. A second side wall; 1232c. A third side wall; 124. A stretching cavity; 125. An air inlet; 1261. A first arc-shaped part; 1262. A second arc-shaped part; 1263. A third arc-shaped part; 1264. A fourth arc-shaped part; 1265. A fifth arc-shaped part; 127. A side body; 128. A front body; 20. A fan assembly. DETAILED DESCRIPTION

[0028] In the following description, numerous specific details are provided in order to provide a thorough understanding of the present application. One of ordinary skill in the art will realize, however, that the application can be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order not to unnecessarily obscure the present application.

[0029] In order to thoroughly understand the embodiments of the present application, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present application is not limited to the special details familiar to those skilled in the art. The preferred embodiments of the present application are described in detail as follows, however, in addition to these detailed descriptions, the present application can also have other embodiments.

[0030] The embodiments of the present application provide a smoke collecting assembly. The smoke collecting assembly provided by the present application can be applied to a range hood. Hereinafter, a smoke collecting assembly according to the embodiments of the present application will be introduced in detail in combination with the accompanying drawings.

[0031] In combination with the accompanying drawings, Figures 1 to 7The smoke collecting assembly 10 can include a first body 110 and a second body 120. The first body 110 can enclose a first smoke collecting cavity 111. The second body 120 can enclose a second smoke collecting cavity 121 which is in communication with the first smoke collecting cavity 111. The second smoke collecting cavity 121 can be located above the first smoke collecting cavity 111 and protrude outward relative to the first smoke collecting cavity 111. It should be understood that "outward" here is closer to the operator and is away from the mounting surface. The second body 120 can have a top body 122 and a bottom body 123. The bottom body 123 can be stretched in the direction of the top body 122 to form a stretching cavity 124 having a top wall 1231 and a side wall 1232. In a vertical cross section of the stretching cavity 124, the first distance H1 between the top wall 1231 and the bottom body 123, and the second distance H2 between the top body 122 and the bottom body 123 satisfy 1 / 2≤H1 / H2≤5 / 6.

[0032] The smoke collecting assembly 10 of the utility model, because the bottom body 123 is stretched in the direction of the top body 122 to form the stretching cavity 124 which is in communication with the second smoke collecting cavity 121, the originally dispersed oil fume can enter the second smoke collecting cavity 121 through the stretching cavity 124, and in the vertical cross section of the stretching cavity 124, the first distance H1 between the bottom body 123 and the top wall 1231 of the stretching cavity 124, and the second distance H2 between the top body 122 and the bottom body 123 satisfy 1 / 2≤H1 / H2≤5 / 6, the stretching cavity 124 can change the path of the dispersed oil fume as much as possible, thereby effectively collecting smoke and improving the smoke collecting effect.

[0033] It should be noted that the mounting surface can be a wall, a cabinet wall, etc.

[0034] In combination with the description of Figure 1 , Figure 4 , Figure 5 and Figure 6 , the first angle α between the top wall 1231 and the horizontal plane can satisfy 0°≤α≤15°. For example, the first angle α can be 0°, 8°, 15°, etc. The first angle α is set in this range, which can effectively guide the oil fume rising to the top wall 1231 to the lower side, facilitate the oil fume to flow to the second smoke collecting cavity 121 in the stretching cavity 124, and improve the smoke collecting effect and the oil fume absorption rate. In an embodiment of the utility model, the first angle α is 7.5°, which can effectively guide the oil fume rising to the top wall 1231 to the lower side.

[0035] In combination with the description of Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7The side wall 1232 can include a first side wall 1232a and a second side wall 1232b. The first side wall 1232a can be opposite to the second side wall 1232b. The first side wall 1232a can be closer to the first smoke collecting cavity 111 than the second side wall 1232b. An air inlet 125 can be arranged on the first side wall 1232a. The stretching cavity 124 can be in communication with the second smoke collecting cavity 121 through the air inlet 125. In this way, the oil fume entering the stretching cavity 124 can rise to the top wall 1231 and then flow to the second smoke collecting cavity 121 through the air inlet 125, or directly flow to the second smoke collecting cavity 121 through the air inlet 125. In addition, the air inlet 125 is closer to the first smoke collecting cavity 111, so that the oil fume can be quickly sucked to the outdoor through the second smoke collecting cavity 121 or the first smoke collecting cavity 111, thereby further improving the oil fume absorption rate. It should be understood that the position of the air inlet 125 is not limited to being arranged on the first side wall 1232a, but can also be arranged on the second side wall 1232b, as long as the second smoke collecting cavity 121 can be in communication with the stretching cavity 124.

[0036] Specifically, the air inlet 125 can be configured as a row-column distributed mesh. In some embodiments, a second air inlet 112 can also be arranged below the air inlet 125. The second air inlet 112 can be arranged on the first body 110 and away from the second body 120. The second air inlet 112 can preliminarily absorb the oil fume, so as to avoid the problem that the oil fume is too much to be completely absorbed by the air inlet 125, thereby improving the oil fume absorption rate.

[0037] In an embodiment not shown, a third air inlet can also be arranged below the air inlet 125, and the third air inlet can be arranged between the first body 110 and the second body 120.

[0038] In some embodiments, the second body 120 can further include a front body 128 and two side bodies 127. The front body 128 and the two side bodies 127 can be connected between the top body 122 and the bottom body 123. The top body 122, the bottom body 123, the front body 128 and the two side bodies 127 can enclose the second smoke collecting cavity 121. The second side wall 1232b can be as close as possible to the front body 128, so that the width (i.e., W1 in Figure 7 In this way, the stretching cavity 124 has a larger smoke collecting range, so as to more effectively collect the smoke and improve the smoke collecting effect.

[0039] For reference, Figure 1 , Figure 4 , Figure 5 and Figure 6The second angle β between the first side wall 1232a and the horizontal plane can be 30°≤β≤50°. For example, the second angle β can be 30°, 43°, 50°, etc. The second angle β is set in this range, which can effectively absorb the oil fume rising to the first side wall 1232a and the oil fume revolving in the stretching cavity 124 into the second smoke collecting cavity 121 through the air inlet 125, improving the smoke collecting effect and the oil fume absorption rate. In an embodiment of the utility model, the second angle β is 40°, at this time, the oil fume rising to the first side wall 1232a and the oil fume revolving in the stretching cavity 124 can be effectively absorbed into the second smoke collecting cavity 121 through the air inlet 125.

[0040] Again in combination with referring to Figure 1 、 Figure 4 、 Figure 5 and Figure 6 , the third angle γ between the second side wall 1232b and the vertical plane can be 10°≤γ≤30°. For example, the third angle γ can be 10°, 21°, 30°, etc. The third angle γ is set in this range, which can effectively guide the oil fume rising to the second side wall 1232b to the first side wall 1232a, facilitate the absorption of the oil fume by the air inlet 125 while ensuring that part of the oil fume not absorbed can revolve in the stretching cavity 124, thereby being absorbed by the air inlet 125, improving the smoke collecting effect and the oil fume absorption rate. In an embodiment of the utility model, the third angle γ is 20°, at this time, the oil fume rising to the second side wall 1232b can be effectively guided to the first side wall 1232a.

[0041] In combination with referring to Figure 1 、 Figure 5 、 Figure 6 and Figure 7 , the first side wall 1232a can be connected with the top wall 1231 through the first arc-shaped part 1261. In this way, the obstruction encountered by the oil fume when revolving in the stretching cavity 124 is reduced, and the problem of the oil fume escaping from the stretching cavity 124 is avoided.

[0042] In combination with referring to Figures 5 to 7 , the second side wall 1232b can be connected with the top wall 1231 through the second arc-shaped part 1262. In this way, the obstruction encountered by the oil fume when revolving in the stretching cavity 124 is reduced, and the problem of the oil fume escaping from the stretching cavity 124 is avoided.

[0043] In some embodiments, the side wall 1232 can further include two oppositely arranged third side walls 1232c. The third side walls 1232c can be connected between the first side wall 1232a and the second side wall 1232b. The first side wall 1232a can be connected with the third side wall 1232c through a third arc-shaped portion 1263. The second side wall 1232b can be connected with the third side wall 1232c through a fourth arc-shaped portion 1264. The top wall 1231 can be connected with the third side wall 1232c through a fifth arc-shaped portion 1265. In this way, the obstacles encountered by the oil fume when circulating in the stretching cavity 124 are effectively reduced, and the problem of oil fume escaping from the stretching cavity 124 is effectively avoided.

[0044] Specifically, the arc-shaped portion, the side wall 1232 and the top wall 1231 can be integrally formed into an integrated structure. The arc-shaped portion, the side wall 1232 and the top wall 1231 can also be connected into an integrated structure by welding, pasting or the like. Of course, the arc-shaped portion, the side wall 1232 and the top wall 1231 can also be connected into a split structure by screwing, bolting, buckling or the like.

[0045] With reference to Figure 1 , Figure 5 , Figure 6 and Figure 7 , the central angle of the first arc-shaped portion 1261 can be smaller than the central angle of the second arc-shaped portion 1262. In this way, the oil fume rising to the second side wall 1232b can be effectively guided to the second side wall 1232b, while the obstacles encountered by the oil fume when circulating in the stretching cavity 124 are effectively reduced, and the smoke collection effect and the oil fume absorption rate are improved.

[0046] With reference to Figure 1 , Figure 4 , Figure 5 and Figure 6 , the third side wall 1232c and the vertical plane can have a fourth angle θ, 0°≤θ≤20°. For example, the fourth angle θ can be 0°, 13°, 20° or the like. When the fourth angle θ is within this range, the oil fume in the stretching cavity 124 can be effectively guided to the air inlet 125 and flow to the second smoke collection cavity 121 through the air inlet 125, and the smoke collection effect and the oil fume absorption rate are improved. In an embodiment of the present application, the fourth angle θ is 10°, at which the oil fume in the stretching cavity 124 can be effectively guided to the air inlet 125 and flow to the second smoke collection cavity 121 through the air inlet 125.

[0047] Understandably, the distance between the two third side walls 1232c is the length L2 of the stretching cavity 124 (see Figure 2 ). The third side wall 1232c can be arranged as close to the side portion 127 as possible, that is, the length L2 of the stretching cavity 124 and the distance L1 between the two side portions 127 (seeFigure 2 ) gap is as small as possible, so that the length of the stretching cavity 124 is larger, so that the smoke collecting range of the stretching cavity 124 is larger, and the smoke is more effectively collected. In an embodiment of the utility model, the end of the third side wall 1232c away from the top body 122 can be in abutment with the end of the side body 127 away from the top body 122, at this time, the length of the stretching cavity 124 is larger, further expands the smoke collecting range of the stretching cavity 124, changes the path of the oil fume as much as possible, can more effectively collect the smoke, and further improves the smoke collecting effect.

[0048] According to another aspect of the utility model, an extractor hood 1 is provided, comprising a fan assembly 20 and a smoke collecting assembly 10 as described above, the smoke collecting assembly 10 is arranged below the fan assembly 20. Since the smoke collecting assembly 10 as described above has the beneficial effects described above, the extractor hood 1 comprising the smoke collecting assembly 10 as described above also has the beneficial effects described above, which will not be repeated here.

[0049] In combination with referring to Figures 1 to 7 , the extractor hood 1 is provided with the smoke collecting assembly 10, and the smoke collecting process is as follows: the oil fume generated in the cooking process can be preliminarily absorbed by the second air inlet 112 first, the oil fume not absorbed continues to rise, the part of the oil fume rising to the first side wall 1232a can be directly absorbed by the air inlet 125; the part of the oil fume rising to the second side wall 1232b can be guided by the second side wall 1232b to the first side wall 1232a and be directly absorbed by the air inlet 125 or be absorbed by the air inlet 125 after revolving in the stretching cavity 124; the part of the oil fume rising to the top wall 1231 can be guided by the top wall 1231 to the first side wall 1232a and be directly absorbed by the air inlet 125 or be absorbed by the air inlet 125 after revolving in the stretching cavity 124; the part of the oil fume rising to the third side wall 1232c can be guided by the third side wall 1232c to the first side wall 1232a and be directly absorbed by the air inlet 125 or be absorbed by the air inlet 125 after revolving in the stretching cavity 124. In this way, the oil fume rising near the bottom body 123 can be fully absorbed, effectively avoiding the problem of oil fume escaping and improving the smoke collecting effect.

[0050] In the description of the utility model, it is to be understood that the orientation words such as “front”, “back”, “upper”, “lower”, “left”, “right”, “transverse”, “vertical”, “vertical”, “horizontal” and “top”, “bottom” and the like indicated orientation or position relationship is usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, in the case where no opposite description is made, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as the limitation on the protection scope of the utility model; the orientation words “inner”, “outer” refer to the inner and outer relative to the contour of each component.

[0051] For ease of description, regional directional terms such as "on", "above", "upper", "lower", and the like can be used herein for describing the orientation of one or more components or features relative to other components or features as shown in the drawings. It will be understood that the regional directional terms are used for ease of description and that they are not intended to limit the position of the components in the drawings. For example, if the components in the drawings were inverted, then a component that is "above" or "on" another component would then be "below" or "under" the other component. Thus, the exemplary term "above" can include both "above" and "below". In addition, the components or features can be positioned in any of a number of orientations (e.g., rotated 90 degrees or other angles), and the descriptions herein are intended to cover all such variations.

[0052] It is to be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting of example embodiments consistent with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, steps, operations, components, elements, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, components, elements, and / or groups thereof.

[0053] It should be noted that the terms "first", "second", and the like, used herein are used to distinguish one element from another, and do not necessarily have to follow an ordinal, numerical, or chronological sequence. It will be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the present application described herein are capable of operation in other sequences than those described or otherwise illustrated herein.

[0054] The utility model has carried on the explanation through the above embodiment, but should understand, the above embodiment is only for example and explanation purpose, and not the intention of limiting the utility model to the range of described embodiment. In addition, the skilled in the art can understand that the utility model is not limited to the above embodiment, according to the teaching of the utility model, more kinds of variations and modifications can be made, and these variations and modifications all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the attached claims and its equivalent scope.

Claims

1. A smoke assembly, characterized in that, The application relates to a smoke collecting device. The smoke collecting device comprises: a first body which encloses a first smoke collecting cavity; and a second body which encloses a second smoke collecting cavity which is connected with the first smoke collecting cavity, the second smoke collecting cavity is located above the first smoke collecting cavity and protrudes outward relative to the first smoke collecting cavity; 2. The smoke assembly of claim 1, wherein, wherein the second body has a top body and a bottom body, the bottom body is stretched in the direction of the top body to form a stretched cavity with a top wall and a side wall, the stretched cavity is connected with the second smoke collecting cavity, and on a vertical section of the stretched cavity, the first distance H1 between the top wall and the bottom body, and the second distance H2 between the top body and the bottom body satisfy the condition 1 / 2<=H1 / H2<=5 / 6.

3. The smoke assembly of claim 1, wherein, The first angle alpha between the top wall and a horizontal plane satisfies the condition 0<=alpha<=15 degrees.

4. The smoke assembly of claim 3, wherein, The side wall comprises a first side wall and a second side wall, the first side wall is opposite to the second side wall, the first side wall is closer to the first smoke collecting cavity than the second side wall, an air inlet is arranged on the first side wall, and the stretched cavity is connected with the second smoke collecting cavity through the air inlet.

5. The smoke assembly of claim 3, wherein, The second angle beta between the first side wall and a horizontal plane satisfies the condition 30<=beta<=50 degrees.

6. The smoke assembly of claim 3, wherein, The third angle gamma between the second side wall and a vertical plane satisfies the condition 10<=gamma<=30 degrees.

7. The smoke assembly of claim 6, wherein, The first side wall is connected with the top wall through a first arc-shaped part.

8. The smoke assembly of claim 7, wherein, The second side wall is connected with the top wall through a second arc-shaped part.

9. The smoke assembly of claim 3, wherein, The central angle of the first arc-shaped part is smaller than that of the second arc-shaped part.

10. A range hood characterized by, The side wall further comprises two opposite third side walls which are connected between the first side wall and the second side wall, and the fourth angle theta between the third side wall and a vertical plane satisfies the condition 0<=theta<=20 degrees. The smoke collecting device is arranged below a fan assembly.

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