Smoke collecting shell, smoke collecting hood assembly and range hood

Abstract

The utility model belongs to the technical field of kitchen utensils, and discloses an exhaust fume collecting shell, an exhaust fume collecting hood assembly and a range hood, in the working process of the range hood, external air flows along a first flow guide surface and is attached to the first flow guide surface when flowing near the first flow guide surface, and then stably flows into a hood air inlet along the first flow guide surface; the design of the first flow guide face better conforms to the fluid flowing form, so that separation of a boundary layer is effectively restrained, and it is guaranteed that airflow around the first flow guide face is stable. The Coanda principle is applied to the design of the first flow guide surface, so that the flowing state of the air can be changed while the air flowing resistance is reduced, most of the air stably flows into the hood air inlet from the left side and the right side of the range hood along the first flow guide surface, and the effect of supplementing air to the hood air inlet is achieved; therefore, the smoke suction effect of the whole range hood is improved, and the user experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to kitchen utensil technical field especially, a kind of smoke collecting shell, smoke collecting cover assembly and range hood. BACKGROUND

[0002] Range hood is common household appliance in kitchen, range hood is generally installed above kitchen stove, to quickly suck away waste produced by stove combustion and oil fume harmful to human body produced in cooking process, condense oil fume, and collect oil dirt formed by condensation, then discharge oil fume after condensation treatment to outdoor, to purify air, reduce pollution, and have the safety guarantee function of preventing poison and explosion.

[0003] Range hood includes smoke collecting cover and fan, smoke collecting shell inside smoke collecting cover is equipped with air duct, one end of air duct forms cover inlet, negative pressure is formed in cover inlet after fan starts, external air around cover inlet is sucked into cover inlet under the action of negative pressure. Currently left and right side plates of smoke collecting shell and lower end surface of smoke collecting shell are perpendicular and directly connected, when external air around left and right side plates flows to cover inlet, left and right side plates will block air, increase air flow resistance, and air flow will form a larger corner, increased resistance will consume negative pressure energy, thereby reducing negative pressure influence range, so as to affect the oil fume suction effect of smoke collecting shell. SUMMARY

[0004] The utility model aims at providing a kind of smoke collecting shell, smoke collecting cover assembly and range hood, can improve the oil fume suction effect of smoke collecting shell.

[0005] To achieve this purpose, first, the utility model provides a kind of smoke collecting shell, smoke collecting shell is equipped with smoke collecting passage, one end of smoke collecting passage forms cover inlet, smoke collecting shell includes two outer side surfaces arranged oppositely along the left and right direction of range hood, and smoke inlet end surface with cover inlet;

[0006] At least one outer side surface is connected with smoke inlet end surface by first flow guide surface, in the direction from top to bottom, first flow guide surface gradually approaches the central axis of smoke collecting passage extending in up-down direction.

[0007] As a kind of implementable scheme of the above smoke collecting shell, first flow guide surface includes bevel chamfer surface or round chamfer surface.

[0008] As a kind of implementable scheme of the above smoke collecting shell, the intersection of the cross section of first flow guide surface and outer side surface is E point, the intersection of the cross section of first flow guide surface and smoke inlet end surface is F point, the included angle between the line connecting E point and F point and horizontal plane is β, 10 ° ≤ β ≤ 65 °, the cross section of first flow guide surface is perpendicular to the front and rear direction of range hood;

[0009] The smoke collecting passage extends to the top surface of the smoke collecting shell from the end away from the hood air inlet, the first section of the top surface intersects with the outer lateral surface at point P, the distance between point E and point P in the vertical direction is h, the distance between point F and point P in the vertical direction is H, 0.25≤h / H<1, and the first section of the top surface is perpendicular to the front-rear direction of the range hood.

[0010] As an implementable scheme of the smoke collecting shell, when the first flow guide surface comprises a circular chamfer surface, the radius of the circular chamfer surface is R1, and R1 is greater than the length of the line segment connecting point E and point F.

[0011] As an implementable scheme of the smoke collecting shell, the front lateral surface of the smoke collecting shell is connected with the smoke inlet end surface through the second flow guide surface, and the second flow guide surface gradually approaches the central axis of the smoke collecting passage extending in the up-down direction along the direction from top to bottom.

[0012] As an implementable scheme of the smoke collecting shell, the second flow guide surface comprises an inclined chamfer surface or a circular chamfer surface.

[0013] As an implementable scheme of the smoke collecting shell, the section of the second flow guide surface intersects with the front lateral surface at point M, the second flow guide surface intersects with the smoke inlet end surface at point N, the angle between the line connecting point M and point N and the horizontal plane is γ, 10°≤γ≤65°, and the section of the second flow guide surface is perpendicular to the left-right direction of the range hood.

[0014] The smoke collecting passage extends to the top surface of the smoke collecting shell from the end away from the hood air inlet, the second section of the top surface intersects with the front lateral surface at point Q, the distance between point M and point Q in the vertical direction is d, the distance between point N and point Q in the vertical direction is D, 0.25≤d / D<1, and the second section of the top surface is perpendicular to the left-right direction of the range hood.

[0015] As an implementable scheme of the smoke collecting shell, when the second flow guide surface comprises a circular chamfer surface, the radius of the circular chamfer surface is R2, and R2 is greater than the length of the line segment connecting point M and point N.

[0016] In a second aspect, the utility model also provides a smoke collecting hood assembly, including the baffle and the smoke collecting shell of any scheme above, the baffle is detachably installed in the smoke collecting shell, and the baffle covers part of the hood air inlet.

[0017] In a third aspect, the utility model also provides a range hood, including power structure and the smoke collecting hood assembly above, and the outlet of the smoke collecting passage is communicated to the power structure.

[0018] The utility model has the advantages of:

[0019] The smoke collecting shell and the range hood provided by the utility model, during the working process of the range hood, when the external air flows to the vicinity of the first flow guide surface, the external air flows along the first flow guide surface and adheres to the first flow guide surface, and then flows into the cover air inlet along the first flow guide surface stably, the design of the first flow guide surface is more in line with the fluid flow form, thereby effectively inhibiting the separation of the boundary layer and ensuring the stability of the airflow around the first flow guide surface.

[0020] In addition, the outer side surface is connected with the smoke inlet end surface through the first flow guide surface, and the appearance of the smoke collecting shell can be optimized. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of the range hood provided by the utility model embodiment one when the range hood is installed on a cabinet;

[0022] Figure 2 is a structural schematic view of the range hood provided by the utility model embodiment one;

[0023] Figure 3 is a partial enlarged schematic view of the range hood when the first flow guide surface adopts an inclined chamfer surface and is provided by the utility model embodiment one;

[0024] Figure 4 is a partial enlarged schematic view of the smoke collecting shell when the first flow guide surface adopts a round chamfer surface and is provided by the utility model embodiment one;

[0025] Figure 5 is an air flow simulation diagram when the traditional range hood sucks oil smoke;

[0026] Figure 6 is a state diagram of the external air around the outer side surface being sucked into the cover air inlet when the traditional range hood works;

[0027] Figure 7 is an air flow simulation diagram when the range hood provided by the utility model embodiment one sucks oil smoke;

[0028] Figure 8 is a structural schematic view of the smoke collecting shell provided by the utility model embodiment two;

[0029] Figure 9 is a partial enlarged schematic view of the smoke collecting shell when the second flow guide surface adopts an inclined chamfer surface and is provided by the utility model embodiment two.

[0030] In the drawings:

[0031] 1, outer side; 2, front side; 3, first flow guide surface; 4, smoke inlet end surface; 5, second flow guide surface; 6, top surface;

[0032] 10, cover air inlet;

[0033] 100, range hood body; 200, smoke collecting shell; 300, power structure; 400, cabinet; 500, cooking bench. DETAILED DESCRIPTION

[0034] The utility model will be described in further detail below in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the utility model and are not limited to the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.

[0035] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0037] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0038] As Figure 1 and Figure 2As shown, the embodiment of the utility model provides a kind of smoke collecting shell, including the smoke collecting shell 200 of smoke collecting hood assembly, and including the smoke collecting hood assembly of range hood, the range hood further includes smoke machine box body 100 and power structure 300, smoke collecting shell 200 is connected with smoke machine box body 100, and air duct is equipped in smoke machine box body 100, and smoke collecting shell 200 is equipped with smoke collecting passage, and one end of smoke collecting passage is formed with cover inlet 10, and the other end of smoke collecting passage is communicated with the import of air duct, and power structure 300 is arranged in air duct, so that the outlet of smoke collecting passage is communicated to power structure 300.The smoke machine box body 100 is installed in the inside of cabinet 400, and cooktop 500 is arranged directly below cover inlet, and smoke machine box body 100 is located above smoke collecting shell 200, and the bottom of smoke collecting shell 200 is equipped with oil cup, for collecting waste oil formed during the operation of range hood.The power structure 300 includes motor and blade and the like for generating airflow device, during the operation of range hood, power structure 300 works, and negative pressure is formed around cover inlet 10, and the air outside smoke collecting shell 200 is sucked into cover inlet 10.

[0039] As Figure 2 And Figure 3 As shown, smoke collecting shell 200 includes two outer sides 1 arranged oppositely along the left-right direction of range hood, and smoke inlet end surface 4 provided with cover inlet 10; at least one outer side 1 is connected with smoke inlet end surface 4 through first flow guide surface 3, and first flow guide surface 3 gradually approaches the central axis of smoke collecting passage extending in up-down direction along the direction from top to bottom.It should be noted that the left-right direction refers to the side of smoke collecting hood assembly facing the user when the user faces the range hood for cooking, and the side of smoke collecting hood assembly facing away from the user is the back side; the left-right direction of the user is the left-right direction of the smoke collecting hood assembly.

[0040] During the operation of range hood, when external air flows to the vicinity of first flow guide surface 3, it will flow along first flow guide surface 3 and adhere to first flow guide surface 3, and then smoothly flow into cover inlet 10 along first flow guide surface 3, and the design of first flow guide surface 3 is more in line with the flow pattern of fluid, thereby effectively inhibiting the separation of boundary layer and ensuring the stability of airflow around first flow guide surface 3.Moreover, the design of first flow guide surface 3 utilizes the Coanda principle, which can change the flow state of air while reducing air flow resistance, so that most of the air smoothly flows into cover inlet 10 along first flow guide surface 3 from the left and right sides of range hood, achieving the effect of air supplementing cover inlet 10, thereby improving the smoke suction effect of the entire range hood and enhancing user experience.

[0041] In addition, connecting outer side 1 with smoke inlet end surface 4 through first flow guide surface 3 can also optimize the appearance of smoke collecting shell 200.

[0042] Exemplarily, each of the two outer side surfaces 1 is connected with the smoke inlet end surface 4 through a first flow guide surface 3, so that air is supplied to the cover air inlet 10 from the left and right sides of the cover air inlet 10 during operation of the range hood, thereby improving the smoke suction effect of the range hood.

[0043] It should be noted that the end of the smoke collecting channel away from the cover air inlet 10 extends to the top surface of the smoke collecting shell 200, and the top surface of the smoke collecting shell 200 is a plane, so that the smoke collecting shell 200 can be conveniently installed on the cabinet 400.

[0044] Further, as shown in Figure 2 and Figure 3 , the first flow guide surface 3 includes an inclined chamfer surface, and the first flow guide surface 3 is easy to process and low in cost. In other embodiments, as shown in Figure 4 , the first flow guide surface 3 can also be a round chamfer surface.

[0045] When the Coanda effect is used to change the air flow trajectory, the air will expand when flowing to the first flow guide surface 3, and the pressure downstream will increase, thereby pressing the air to deflect laterally. However, if the inclination angle of the first flow guide surface 3 is too small, the flow guide effect will be weak, and if the inclination angle of the first flow guide surface 3 is too large, the air flowing through the first flow guide surface 3 and separating from the first flow guide surface 3 will no longer adhere to the smoke inlet end surface 4 connected with the first flow guide surface 3, thereby reducing the flow guide effect.

[0046] In view of this, as shown in Figure 2 and Figure 3 , the cross section of the first flow guide surface 3 intersects with the outer side surface 1 at point E, and the cross section of the first flow guide surface 3 intersects with the smoke inlet end surface 4 at point F, the angle between the line connecting points E and F and the horizontal plane is β, 10°≤β≤65°, and the cross section of the first flow guide surface 3 is perpendicular to the front-rear direction of the range hood; the first cross section of the top surface intersects with the outer side surface 1 at point P, the vertical distance between points E and P is h, the vertical distance between points F and P is H, 0.25≤h / H<1, and the first cross section of the top surface is perpendicular to the front-rear direction of the range hood.

[0047] Among them, the line connecting points E and F is denoted as line segment EF, the horizontal distance between points E and F is L, and β=arctan[(H-h) / L],

[0048] It is found through experiments that the limitation of 0.25≤h / H<1 and 10°≤β≤65° can effectively ensure the effect of supplying air to the cover air inlet 10 by guiding the air flow using the first flow guide surface 3.

[0049] It should be noted that the ratio of h / H can be selected as any value greater than or equal to 0.25 and less than 1, such as the ratio of h / H can be selected as any value of 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95.

[0050] β can be selected as any angle between 10° and 65°, preferably, β is selected as any one of 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°.

[0051] It should be noted that, as shown in Figure 4 , when the first flow guide surface 3 adopts a circular chamfer surface, the radius of the circular chamfer surface is R1, and R1 is greater than the length of the line segment connecting E point and F point, so as to avoid that R1 is too small and the flow guiding effect of the first flow guide surface 3 is deviated. When R1 is infinite, the first flow guide surface 3 is a bevel chamfer surface.

[0052] Further, as shown in Figure 2 and Figure 3 , along the direction from front to back, the height of the first flow guide surface 3 gradually decreases. When the first flow guide surface 3 is a bevel chamfer surface, it can be said that the first flow guide surface 3 is inclined relative to the front-back direction and is high in front and low in back. By such arrangement, the height of the lower end of the front side surface 2 of the smoke collecting shell 200 can be increased, which not only prevents the user's head from hitting the upper smoke collecting shell 200, but also facilitates the oil fume generated during cooking to enter the cover air inlet 10.

[0053] It should be noted that when the first flow guide surface 3 adopts a circular chamfer surface, the line connecting the above-mentioned E point and F point refers to a chord length of the circular chamfer surface.

[0054] It should be noted that the height of the first flow guide surface 3 can also be set as unchanged along the direction from front to back.

[0055] Further, the smoke collecting cover assembly further comprises a baffle, the baffle is detachably installed on the cover air inlet 10, and the baffle covers at least part of the cover air inlet 10. The baffle is detachably installed on the smoke collecting shell 200, which facilitates the user to clean the baffle in time.

[0056] Exemplarily, the baffle divides the cover air inlet 10 into four side air inlets, two of which are oppositely arranged along the left-right direction, and the other two are oppositely arranged along the front-back direction. After hitting the baffle, the oil fume flows along the surface of the baffle, and when the oil fume flows to the edge of the baffle, it can directly enter the side air inlet, without turning, small air resistance, low oil fume escape probability, and more complete oil fume suction. As an alternative, the baffle can also completely cover the cover air inlet 10, and a baffle with an air inlet can be used, and the air inlet is distributed on the circumferential edge of the baffle.

[0057] Air flow simulation is performed on the conventional range hood without the first flow guide surface 3 and the range hood provided in the embodiment. Figure 5 The range encircled by the white dotted line shown in the figure is the negative pressure action range of the conventional range hood when it is sucking oil fume, Figure 7 The range encircled by the white dotted line shown in the figure is the negative pressure action range of the range hood provided in the embodiment when it is sucking oil fume.

[0058] It can be obviously found that, as shown in Figure 5 and Figure 6 , although the air outside the conventional range hood can be sucked into the cover inlet 10 under the action of negative pressure, in the conventional range hood, the outer side surface 1 is directly connected with the smoke inlet end surface 4 or connected through a process chamfer, the air flow resistance is large when the air flows to the outer side surface 1, a large corner is formed when the air continues to flow to the cover inlet 10, the negative pressure energy consumed by the air resistance increases, thereby reducing the negative pressure range of the conventional range hood. As shown in Figure 3 and Figure 7 , in the embodiment, the outer side surface 1 is connected with the smoke inlet end surface 4 through the first flow guide surface 3, the air around the smoke collecting shell 200 is guided to the cover inlet 10 through the first flow guide surface 3, the air flow resistance is reduced through the Coanda effect, the air is more smoothly guided into the cover inlet 10 by the first flow guide surface 3, thereby reducing the consumption of negative pressure, helping the outward movement of negative pressure, and thereby increasing the negative pressure action range.

[0059] As shown in Figure 5 and Figure 7 , compared with the conventional range hood, the negative pressure action range of the smoke collecting shell 200 in the embodiment is obviously larger, most of the air can smoothly enter the cover inlet 10 along the first flow guide surface 3, and finally form the effect of air supplement to the cover inlet 10, thereby improving the smoke suction effect of the entire range hood and improving the user experience.

[0060] Embodiment Two

[0061] The difference between the embodiment and the embodiment one is that, as shown in Figure 8 and Figure 9 , the front side surface 2 of the smoke collecting shell 200 can be connected with the smoke inlet end surface 4 through the second flow guide surface 5 when the first flow guide surface is arranged, the second flow guide surface 5 gradually approaches the central axis of the smoke collecting channel extending in the up-down direction along the direction from top to bottom. It should be noted that, Figure 8 and Figure 9 , the first flow guide surface is not shown.

[0062] Exemplarily, the second flow guide surface 5 includes an inclined chamfer surface, which is convenient to process and low in cost. In other embodiments, the second flow guide surface 5 can also adopt a round chamfer surface.

[0063] The second flow guide surface 5 intersects with the front side surface 2 at a point M, and intersects with the smoke inlet end surface 4 at a point N, and the angle between the line connecting the points M and N and the horizontal plane is γ, 10°≤γ≤65°, and the cross section of the second flow guide surface 5 is perpendicular to the left-right direction of the range hood.

[0064] The second cross section of the top surface 6 intersects with the front side surface 2 at a point Q, the vertical distance between the points M and Q is d, and the vertical distance between the points N and Q is D, 0.25≤d / D<1, and the second cross section of the top surface 6 is perpendicular to the left-right direction of the range hood.

[0065] By limiting 0.25≤d / D<1 and 10°≤γ≤65°, it is found through experiments that the effect of using the second flow guide surface 5 to guide air to supplement air to the cover air inlet 10 can be effectively ensured.

[0066] It should be noted that the ratio of d / D can be selected to be any value greater than or equal to 0.25 and less than 1, such as any one of 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95. γ can be selected to be any angle between 10° and 65°, and preferably, β is selected to be any one of 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°.

[0067] It should be noted that when the second flow guide surface 5 adopts a circular chamfer surface, the line connecting the above-mentioned points M and N refers to a chord length of the circular chamfer surface, the radius of the circular chamfer surface is R2, and R2 is greater than the length of the line segment connecting the points M and N, so as to avoid that R2 is too small and the guiding effect of the second flow guide surface 5 is deviated. When R2 is infinite, the second flow guide surface 5 is a bevel chamfer surface.

[0068] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model claim.

Claims

1. A smoke collecting housing, characterized by, The smoke collecting shell (200) is provided with a smoke collecting channel, one end of the smoke collecting channel is formed with a cover air inlet (10), the smoke collecting shell (200) comprises two outer sides (1) arranged opposite to each other in the left-right direction of the range hood, and an air inlet end surface (4) provided with the cover air inlet (10); At least one of the outer sides (1) is connected to the air inlet end surface (4) through a first flow guide surface (3), and the first flow guide surface (3) gradually approaches a central axis extending in the up-down direction of the smoke collecting channel in the direction from top to bottom.

2. The plenum chamber of claim 1, wherein, The first flow guide surface (3) comprises an inclined chamfer surface or a circular chamfer surface.

3. The plenum chamber of claim 2, wherein, A cross section of the first flow guide surface (3) intersects the outer side (1) at an E point, and intersects the air inlet end surface (4) at an F point, an included angle between a line connecting the E point and the F point and a horizontal plane is β, 10°≤β≤65°, and a cross section of the first flow guide surface (3) is perpendicular to the front-rear direction of the range hood. An end of the smoke collecting channel away from the cover air inlet (10) extends to a top surface (6) of the smoke collecting shell (200), a first cross section of the top surface (6) intersects the outer side (1) at a P point, a vertical distance between the E point and the P point is h, a vertical distance between the F point and the P point is H, 0.25≤h / H<1, and the first cross section of the top surface (6) is perpendicular to the front-rear direction of the range hood.

4. The plenum chamber of claim 3, wherein, When the first flow guide surface (3) comprises a circular chamfer surface, a radius of the circular chamfer surface is R1, and R1 is greater than a length of a line segment connecting the E point and the F point.

5. The plenum chamber according to any one of claims 1 to 4, characterized in that A front side (2) of the smoke collecting shell (200) is connected to the air inlet end surface (4) through a second flow guide surface (5), and the second flow guide surface (5) gradually approaches the central axis extending in the up-down direction of the smoke collecting channel in the direction from top to bottom.

6. The plenum chamber of claim 5, wherein, The second flow guide surface (5) comprises an inclined chamfer surface or a circular chamfer surface.

7. The plenum chamber of claim 5 wherein, A cross section of the second flow guide surface (5) intersects the front side (2) at an M point, and intersects the air inlet end surface (4) at an N point, an included angle between a line connecting the M point and the N point and a horizontal plane is γ, 10°≤γ≤65°, and a cross section of the second flow guide surface (5) is perpendicular to the left-right direction of the range hood. An end of the smoke collecting channel away from the cover air inlet (10) extends to a top surface (6) of the smoke collecting shell (200), a second cross section of the top surface (6) intersects the front side (2) at a Q point, a vertical distance between the M point and the Q point is d, a vertical distance between the N point and the Q point is D, 0.25≤d / D<1, and the second cross section of the top surface (6) is perpendicular to the left-right direction of the range hood.

8. The plenum chamber of claim 7, wherein, When the second flow guide surface (5) comprises a circular chamfer surface, a radius of the circular chamfer surface is R2, and R2 is greater than a length of a line segment connecting the M point and the N point.

9. A fume hood assembly characterized by, The smoke collecting cover (200) as claimed in any one of claims 1 to 8, further comprising a baffle detachably mounted to the smoke collecting cover (200), the baffle covering at least part of the cover inlet (10).

10. A range hood characterized by, The smoke collecting cover assembly as claimed in claim 9, further comprising a power structure (300), the outlet of the smoke collecting passage being in communication with the power structure (300).

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