Range hood

Abstract

The utility model discloses a range hood, which comprises a shell, a range hood cover and a range hood cover, the flow dividing structure is arranged in the oil smoke suction channel and used for dividing the oil smoke suction channel into a left side channel and a right side channel, the flow dividing structure comprises a fixed part connected with the shell and a rotating part rotationally connected with the fixed part, and the rotating part is used for adjusting the size of the left side channel and the size of the right side channel. According to the technical scheme, the oil smoke suction effect of the range hood can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, and particularly relates to a range hood. Background Art

[0002] A range hood is usually installed above a cooking appliance, and can quickly extract the oil fume generated during the food cooking process and discharge the oil fume.

[0003] In order to adapt to the layout of the left and right double burners of a kitchen stove, the existing range hoods are often provided with two left and right air inlets to match the operation of the stove, and each burner is matched with an air inlet to achieve uniform oil fume extraction for the cooking appliances on the two burners.

[0004] However, in some cooking scenarios, users only use one burner for cooking, resulting in a large amount of oil fume generated under one air inlet, while only a small amount of oil fume diffuses under the other air inlet. Or, the cooking appliance on one burner performs operations such as frying that generate a large amount of oil fume, and the cooking appliance on the other burner performs operations such as stewing that generate a small amount of oil fume, resulting in a large amount of oil fume generated under one air inlet and a small amount of oil fume generated under the other air inlet. In these cooking scenarios, when the uniform oil fume extraction method is still adopted, it will lead to the phenomenon that the oil fume on the side with a large amount of oil fume cannot be sucked clean, while there is an excess of wind force on the side with a small amount of oil fume, thus resulting in poor oil fume extraction effect of the range hood. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a range hood, aiming to improve the oil fume extraction effect of the range hood.

[0006] To achieve the above purpose, the range hood proposed by the utility model includes:

[0007] A housing, internally provided with an oil fume extraction channel; and

[0008] A flow splitting structure, arranged in the oil fume extraction channel, used for dividing the oil fume extraction channel into a left channel and a right channel. The flow splitting structure includes a fixing part connected to the housing and a rotating part rotatably connected to the fixing part. The rotating part is used to adjust the sizes of the left channel and the right channel.

[0009] Optionally, the fixing part is located below the rotating part.

[0010] Optionally, the rotating part has two rectifying surfaces respectively facing the left channel and the right channel;

[0011] The distance between the two rectifying surfaces is gradually decreased in the direction away from the fixing part; and / or, the distance between the two rectifying surfaces is equal in the front-back direction.

[0012] Optionally, the fixing part has two guiding surfaces respectively facing the left channel and the right channel;

[0013] The distance between the two guiding surfaces is gradually decreased in the direction away from the rotating part; and / or, the distance between the two guiding surfaces is equal in the front-back direction.

[0014] Optionally, a connecting groove is provided on the lower end surface of the rotating part to movably cover the upper end of the fixing part through the connecting groove.

[0015] Optionally, the housing includes a guiding plate, and the guiding plate includes a main guiding section that extends obliquely upward in the direction from the rear to the front, and a smoke inlet communicating with the oil fume suction channel is provided on the main guiding section;

[0016] At least part of the rotating part is located above the smoke inlet, and an avoidance notch is provided on the front edge of the rotating part corresponding to the part of the main guiding section located above the smoke inlet; and / or a flexible isolation member is provided between the front edge of the rotating part and the part of the main guiding section located above the smoke inlet.

[0017] Optionally, the housing is provided with a smoke inlet communicating with the oil fume suction channel, and at least part of the fixing part extends into the lower side of the smoke inlet.

[0018] Optionally, the housing is provided with a smoke inlet communicating with the oil fume suction channel, and a dividing beam is provided on the smoke inlet to divide the smoke inlet into a left inlet communicating with the left channel and a right inlet communicating with the right channel;

[0019] The fixing part is located inside the dividing beam, and the dividing beam can cover the fixing part in the left-right direction; and / or

[0020] The rotation axis of the rotating part is located between the upper edge and the lower edge of the smoke inlet and is close to the upper edge of the smoke inlet.

[0021] Optionally, the housing includes a smoke collecting hood and a blower hood provided on the upper side of the smoke collecting hood, a smoke passing port is provided between the blower hood and the smoke collecting hood, the fixing part is provided on the smoke collecting hood, and the upper end of the rotating part is not higher than the smoke passing port.

[0022] Optionally, the range of the rotatable angle of the rotating part relative to the left channel and the right channel from the vertical state is 0° to 90°.

[0023] Optionally, when the channel formed between the rotating part and the left channel or the right channel is at its minimum, the rotating angle of the rotating part relative to the left channel or the right channel from the vertical state is β, and the value range of β is from 30° to 60°.

[0024] Optionally, the range hood further includes an exhaust fan disposed in the housing. The exhaust fan is provided with a fan inlet, and the fan inlet is offset in the left-right direction. The rotating part has a preset state in which the air intake amounts of the left channel and the right channel tend to be the same. In the preset state, the rotating part is deflected relative to the vertical direction in the left-right direction, and the deflection direction of the rotating part is the same as the offset direction of the fan inlet.

[0025] Optionally, the housing includes a smoke collecting hood and a fan hood disposed above the smoke collecting hood, and a smoke passing opening is provided between the fan hood and the smoke collecting hood;

[0026] The smoke collecting hood is provided with a smoke inlet communicating with the smoke extraction channel, and a wind guiding sink is provided at the periphery of the smoke inlet and is tapered in the inward direction; and / or

[0027] Two flow guiding members are provided in the smoke collecting hood and are respectively disposed on opposite sides of the smoke passing opening. The width between the two flow guiding members gradually decreases in the direction close to the smoke passing opening.

[0028] Optionally, the housing is provided with an inwardly convex mounting boss, and the fixing part is mounted on the mounting boss.

[0029] The technical solution of the present utility model sets a flow splitting structure in the oil fume suction channel to divide the oil fume suction channel into a left channel and a right channel, thereby effectively reducing the eddy current caused by the intersection and collision of two oil fume flows entering the oil fume suction channel from both sides of the smoke inlet, improving the smoothness of the oil fume passing through the oil fume suction channel, thus enhancing the smoking effect of the range hood and reducing noise; in addition, the flow splitting structure includes a rotating part, and the rotating part can be rotated to increase the channel corresponding to the side with a large amount of oil fume and simultaneously reduce the channel corresponding to the side with a small amount of oil fume, thereby enhancing the oil fume suction capacity of the channel corresponding to the side with a large amount of oil fume and simultaneously reducing the oil fume suction capacity of the channel corresponding to the side with a small amount of oil fume, so as to improve the oil fume suction effect of the range hood; furthermore, the flow splitting structure also includes a fixing part, and the fixing part not only provides an installation support for the rotating connection of the rotating part, but also has the function of separating the oil fume suction channel, thereby being able to more effectively reduce the eddy current caused by the intersection and collision of two oil fume flows entering the oil fume suction channel from both sides of the smoke inlet, better improving the smoothness of the oil fume passing through the oil fume suction channel, and the space inside the fixing part can also be used to install a driving mechanism for driving the rotation of the rotating part, so as to isolate the oil fume from the driving mechanism through the housing of the fixing part, preventing the oil fume from depositing on the driving structure, thereby prolonging the service life of the driving mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0031] Figure 1 It is a schematic structural diagram of an embodiment of the range hood of the present utility model;

[0032] Figure 2 It is Figure 1 a front view schematic diagram of the range hood in

[0033] Figure 3 It is Figure 1 a rear view schematic diagram of the range hood in

[0034] Figure 4 It is Figure 1 a front view schematic diagram of the range hood in

[0035] Figure 5 It is Figure 1 a partial cross-sectional schematic diagram of the range hood in

[0036] Figure 6 is Figure 1 a schematic structural view of the back panel of the range hood in

[0037] Figure 7 is Figure 1 a schematic structural view of the flow splitting structure of the range hood in

[0038] Figure 8 is Figure 7 a rear view schematic of the flow splitting structure in

[0039] Figure 9 is Figure 8 an enlarged schematic view of location A in

[0040] Figure 10 a cross-sectional schematic view of another embodiment of the range hood of the present utility model;

[0041] Figure 11 is Figure 10 a schematic structural view of the flow splitting structure of the range hood in

[0042] Figure 12 is Figure 11 a schematic structural view of the flexible spacer of the flow splitting structure in

[0043] Figure 13 an exploded schematic view of another embodiment of the range hood of the present utility model;

[0044] Figure 14 is Figure 13 an enlarged schematic view of location B in

[0045] Figure 15 a schematic structural view of yet another embodiment of the flow splitting structure of the range hood of the present utility model;

[0046] Figure 16 a schematic structural view of still another embodiment of the range hood of the present utility model.

[0047] Explanation of the reference numerals in the drawings:

[0048] 1. Housing; 11. Smoke collecting hood; 12. Fan housing; 110. Smoke passing port; 100. Smoke inlet; 101. Left inlet; 102. Right inlet; 10. Oil fume suction channel; 10a. Left channel; 10b. Right channel; 13. Back plate; 131. Mounting boss; 14. Deflector; 141. Main deflector section; 142. Sub-deflector section; 103. Air guide sink; 15. Blocking member; 151. Passing port; 16. Partition beam; 17. Drainage member; 2. Shunt structure; 21. Rotating part; 21a. Rectifying surface; 21b. Connecting groove; 211. Avoidance notch; 212. Reinforcing rib; 22. Fixed part; 22a. Deflecting surface; 22b. Right positioning stop; 22c. Limit card slot; 23. Flexible isolation member; 231. Mounting plane; 232. Positioning card slot; 233. Avoidance passing port; 234. Slit; 24. Extension part; 3. Exhaust fan; 31. Fan inlet; 41. Trigger member; 42. Induction member; 411. Trigger projection; 421. Tactile switch; 5. Smoke gathering plate; 51. Transmission rod

[0049] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0050] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0051] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0052] In addition, if the embodiments of the present utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0053] The present utility model provides an oil fume extractor.

[0054] Referring to Figures 1 to 3 , in an embodiment of the present utility model, the oil fume extractor includes:

[0055] A housing 1 provided with an oil fume extraction channel 10; and

[0056] A flow splitting structure 2 disposed in the oil fume extraction channel 10 for dividing the oil fume extraction channel 10 into a left channel 10a and a right channel 10b.

[0057] Without loss of generality, the housing 1 is provided with a smoke inlet 100 and a smoke outlet that are both communicated with the oil fume extraction channel 10. The flow splitting structure 2 is usually disposed close to the smoke inlet 100 to divide the oil fume extraction channel 10 into a left channel 10a and a right channel 10b inside the smoke inlet 100, thereby effectively reducing the eddy current caused by the two streams of oil fume entering the oil fume extraction channel 10 from both sides of the smoke inlet 100, improving the smoothness of the oil fume passing through the oil fume extraction channel 10, thereby improving the smoking effect of the oil fume extractor and reducing the noise.

[0058] In one embodiment, the flow splitting structure 2 can be configured as a structure that is relatively fixed to the housing 1 as a whole. That is to say, the flow splitting structure 2 can be a shaped structure fixed in the oil fume extraction channel 10 (see Figure 15 ). However, this design is not limited thereto. In other embodiments, the flow splitting structure 2 can also be configured as a structure that rotates at least partially relative to the housing 1 (see Figure 7 ) to adjust the sizes of the left channel 10a and the right channel 10b through the rotating part.

[0059] For the embodiment of the flow splitting structure 2 that rotates at least partially relative to the housing 1, referring to Figures 1 to 3 、 Figure 5 andFigure 7 The shunt structure 2 may include a rotating part 21 rotatably arranged in the oil fume suction channel 10, so as to adjust the sizes of the left channel 10a and the right channel 10b through the rotating part 21, thereby adjusting the oil fume suction capabilities of the left channel 10a and the right channel 10b. It should be noted that the adjustment of the sizes of the left channel 10a and the right channel 10b here does not refer to the adjustment of the sizes of all positions in the left channel 10a and the right channel 10b, but refers to the adjustment of the size of the minimum connected cross-section of the left and right channels and the right channel 10b. The minimum connected cross-section is the throat of the corresponding channel, and its size is directly proportional to the smoking ability of the corresponding channel.

[0060] When the rotating part 21 rotates relative to the left channel 10a, the oil fume suction ability of the left channel 10a can be reduced, and at the same time, the oil fume suction ability of the right channel 10b can be increased. When the rotating part 21 rotates relative to the right channel 10b, the oil fume suction ability of the right channel 10b can be reduced, and at the same time, the oil fume suction ability of the left channel 10a can be increased. For a gas stove with a double burner, the user may only use one of the left and right burners for cooking, resulting in a large amount of oil fume generated under one of the left channel 10a and the right channel 10b, and a small amount of oil fume diffused under the other. Or when the user uses both the left and right burners for cooking at the same time, one is performing operations such as frying that generate a large amount of oil fume, and the other is performing operations such as simmering on a low fire that generate a small amount of oil fume, resulting in a large amount of oil fume generated under one of the left channel 10a and the right channel 10b, and a small amount of oil fume generated under the other. In this case, the rotating part 21 can be rotated to increase the channel corresponding to the side with a large amount of oil fume, and at the same time, reduce the channel corresponding to the side with a small amount of oil fume, thereby enhancing the oil fume suction ability of the channel corresponding to the side with a large amount of oil fume, and at the same time reducing the oil fume suction ability of the channel corresponding to the side with a small amount of oil fume, so as to improve the oil fume suction effect of the range hood.

[0061] It is worth mentioning that the rotation control of the rotating part 21 can be manually controlled by the user according to the size of the oil fume, or the range hood can be automatically controlled by setting an oil fume monitoring device for detecting the size of the oil fume on the corresponding side and configuring a controller according to the detection result of the oil fume monitoring device.

[0062] In addition, in the present utility model, the rotating part 21 can be directly rotatably connected to the housing 1, or can be indirectly rotatably connected to the housing 1.

[0063] For the embodiment indirectly connected to the housing 1, the shunt structure 2 further includes a fixing part 22 connected to the housing 1, and the rotating part 21 is rotatably connected to the fixing part 22 (see Figure 7)。The fixing part 22 not only provides a mounting support for the rotation of the rotating part 21, but also has the function of separating the oil fume passage 10, so as to more effectively reduce the eddy current caused by the mixing and collision of two streams of oil fume entering the oil fume passage 10 from both sides of the smoke inlet 100, and better improve the smoothness of the oil fume passing through the oil fume passage 10. In addition, the space inside the fixing part 22 can also be used to install a driving mechanism for driving the rotation of the rotating part 21, so as to isolate the oil fume from the driving mechanism through the housing of the fixing part 22, avoid the deposition of oil fume on the driving structure, and thus extend the service life of the driving mechanism.

[0064] Referring to Figure 5 and Figure 6 , further, the outer shell 1 is provided with an inwardly convex mounting boss 131, and the fixing part 22 is mounted on the mounting boss 131. In this way, the oil fume liquid condensed in the outer shell 1 above the mounting boss 131 will flow downward around the mounting boss 131, so as to prevent the oil liquid from leaking to the outside of the range hood from the connection between the fixing part 22 and the outer shell 1. Optionally, the mounting boss 131 is provided on the back plate 13 of the outer shell 1. Further optionally, a part of the back plate 13 bulges inwardly into the oil fume passage 10 to form the inwardly convex mounting boss 131, and a receiving groove is formed on the back side of the mounting boss 131 to receive the outer end of the fastener connecting the fixing part 22 and the mounting boss 131. The fastener can be a screw or a rivet, etc.

[0065] Referring to Figure 5 and Figure 7 , further, the fixing part 22 is located below the rotating part 21. In this way, the fixing part 22 is closer to the smoke inlet 100 than the rotating part 21. Two streams of oil fume entering the oil fume passage 10 from both sides of the smoke inlet 100 can be separated by the fixing part 22, so as to limit the mixing and collision of these two streams of oil fume, reduce the eddy current, and improve the smoothness of oil fume extraction. However, this design is not limited thereto. In other embodiments, the fixing part 22 can also be located above the rotating part 21.

[0066] Without loss of generality, referring to Figure 8 , the rotating part 21 has two rectifying surfaces 21a respectively facing the left channel 10a and the right channel 10b.

[0067] Further, the distance between the two rectifying surfaces 21a is gradually decreased in the direction away from the fixing portion 22, so as to reduce the distance between the ends of the two rectifying surfaces 21a that are away from the fixing portion 22, thereby reducing the eddy current generated when the oil fume airflow breaks away from the ends of the rectifying surfaces 21a that are away from the fixing portion 22 and reducing the noise. Optionally, the ends of the two rectifying surfaces 21a that are away from the fixing portion 22 are connected to form a conical tip, so that not only can the generation of eddy current be reduced, but also the condensed oil fume can be downwardly diverted through the conical tip, thereby preventing the accumulation of oil fume at the top of the rotating portion 21.

[0068] Further, the distance between the two rectifying surfaces 21a is equal in the front-rear direction, so that the rectifying capabilities of the rectifying surfaces 21a at various positions in the front-rear direction are equivalent, and the probability of generating eddy current on the rectifying surfaces 21a is reduced.

[0069] Without loss of generality, referring to Figure 8 , the fixing portion 22 has two guiding surfaces 22a respectively facing the left channel 10a and the right channel 10b.

[0070] Further, the distance between the two guiding surfaces 22a is gradually decreased in the direction away from the rotating portion 21, that is, the guiding surfaces 22a are gradually inclined upward, and can more smoothly guide the oil fume airflow to the rotating portion 21.

[0071] Further, the distance between the two guiding surfaces 22a is equal in the front-rear direction, so that the guiding capabilities of the guiding surfaces 22a at various positions in the front-rear direction are equivalent, and the probability of generating eddy current on the guiding surfaces 22a is reduced.

[0072] Further, referring to Figure 8 and Figure 9 , a connecting groove 21b is provided on the lower end surface of the rotating portion 21 to movably cover the upper end of the fixing portion 22 through the connecting groove 21b. In this way, after the oil fume condensed on the rotating portion 21 flows to the edge of the connecting groove 21b, it will drip onto the guiding surface 22a of the fixing portion 22, reducing the probability of the condensed oil fume entering between the rotating portion 21 and the fixing portion 22 and preventing the phenomenon of oil fume accumulation in the connection gap between the two, resulting in rotation jamming.

[0073] Optionally, the connecting groove 21b is arc-shaped to adapt to the rotation trajectory of the rotating part 21, thereby reducing the gap between the rotating part 21 and the fixed part 22 and further reducing the probability of oil entering the gap. Further optionally, the upper end surface of the fixed part 22 is arc-shaped to further reduce the gap between the rotating part 21 and the fixed part 22. At the same time, even if oil drips onto the upper end surface of the fixed part 22, the oil will flow along the arc-shaped upper end surface to the diversion surface 22a, thereby reducing the probability of oil entering the gap.

[0074] Further, referring to Figure 7 , the lower end surface of the rotating part 21 is arranged as a V-shaped surface with the tip facing downwards, which is beneficial to increasing the rotation range of the rotating part 21, thereby improving the size adjustment ability of the rotating part 21 for the left channel 10a and the right channel 10b.

[0075] Further, to prevent the rotating part 21 from rotating relative to the fixed part 22 to a position where it is difficult to reset, the fixed part 22 is provided with a left positioning convex and a right positioning convex 22b (see Figure 14 ). When the rotating part 21 abuts against the left positioning convex, the rotation angle of the rotating part 21 relative to the left channel 10a is the largest; when the rotating part 21 abuts against the right positioning convex 22b, the rotation angle of the rotating part 21 relative to the right channel 10b is the largest. Optionally, both the left positioning convex and the right positioning convex 22b are arranged on the rear end surface of the fixed part 22 to prevent the left positioning convex and the right positioning convex 22b from blocking the upward flowing oil fume airflow. Further optionally, the left positioning convex and the right positioning convex are respectively arranged on the opposite side edges of the rear end surface of the fixed part 22 and extend along the up and down direction. In this way, the left positioning convex and the right positioning convex 22b also have the function of guiding the oil fume airflow upwards.

[0076] Referring to Figure 1 , Figure 2 and Figure 5 , further, at least part of the flow splitting structure 2 extends into the lower side of the smoke inlet 100. It can be understood that due to the wall attachment effect of the oil fume airflow, extending at least part of the flow splitting structure 2 into the lower side of the smoke inlet 100 can reduce the probability of the oil fume airflow intersecting and colliding to form eddies on the lower side of the flow splitting structure 2, thereby improving the smoke inlet efficiency, reducing the eddy noise, and enhancing the user experience. It should be noted that in the embodiment where the fixed part 22 is provided and the fixed part 22 is located below the rotating part 21, at least part of the fixed part 22 extends into the lower side of the smoke inlet 100.

[0077] Furthermore, the housing 1 includes a deflector 14. The deflector 14 includes a main deflector section 141 that extends upwardly and obliquely in the direction from the rear to the front, and the smoke inlet 100 is provided on the main deflector section 141. The provision of the deflector 14 increases the smoke gathering area on the left and right sides of the range hood, so as to utilize the wall attachment effect of the air flow to enhance the smoking effect of the smoke inlet 100; at the same time, the provision of the deflector 14 can also prevent the dirt in the smoke suction channel 10 from being exposed outside, thereby avoiding the reduction of the user experience.

[0078] Optionally, a wind guiding sink 103 is provided on the periphery of the smoke inlet 100 and is tapered in the inward direction to further improve the smoking effect of the smoke inlet 100.

[0079] Furthermore, the deflector 14 further includes a secondary deflector section 142 connected to the lower end of the main deflector section 141. The secondary deflector section 142 extends downwardly and obliquely in the direction from the rear to the front to gradually guide the oil fume air flow to the smoke inlet 100. It can be understood that the secondary deflector section 142 is part of the wind guiding sink 103; without loss of generality, the periphery of the smoke inlet 100 bulges inward to form the wind guiding sink 103. In this way, the secondary deflector section 142 that extends downwardly and obliquely in the direction from the rear to the front is formed on the lower side of the smoke inlet 100.

[0080] Furthermore, referring to Figure 5 , the front-back width of the part of the fixing portion 22 extending into the lower side of the smoke inlet 100 is gradually increased in the downward direction, so that the part of the fixing portion 22 extending into the lower side of the smoke inlet 100 is adapted to abut against the secondary deflector section 142. Thus, on the one hand, it avoids the eddy current generated by the mixing and collision of the oil fume air flow at the gap between the fixing portion 22 and the secondary deflector section 142, and on the other hand, it can also improve the installation stability of the fixing portion 22.

[0081] However, this design is not limited thereto. In other embodiments, referring to Figure 13 and Figure 14, to reduce the probability of the oil fume airflow intersecting and colliding to form eddies on the lower side of the fixed part 22, the range hood may further include a blocking member 15 provided on the lower side of the smoke inlet 100 and extending horizontally. The blocking member 15 is provided with a through opening 151 corresponding to the fixed part 22, and the lower end of the fixed part 22 penetrates through the through opening 151. It can be understood that on the one hand, the blocking member 15 can prevent the oil fume airflow from entering the lower side of the fixed part 22, and on the other hand, it can also prevent users from reaching their hands under the smoke inlet 100 when cleaning the oil in the smoke absorption channel 10, thereby avoiding the user's hand being scratched by the sharp flanging that may exist in the smoke inlet 100. Optionally, the lower end of the fixed part 22 is provided with a limiting slot 22c extending horizontally, and the edge of the through opening 151 is clamped in the limiting slot 22c to realize the limiting installation of the blocking member 15. Optionally, the blocking member 15 is detachably connected to the fixed part 22. Further optionally, the blocking member 15 and the fixed part 22 are connected by screw locking to improve the connection reliability between the two.

[0082] Refer to Figure 2 , Figure 3 and Figure 6 , further, the housing 1 includes a smoke collecting hood 11 and a blower hood 12 provided on the upper side of the smoke collecting hood 11. The smoke inlet 100 is provided on the smoke collecting hood 11, the smoke outlet is provided on the blower hood 12, a smoke passing opening 110 is provided between the blower hood 12 and the smoke collecting hood 11, and the exhaust blower 3 of the range hood is provided in the blower hood 12. However, this design is not limited thereto. In some other embodiments, the housing 1 may only include the smoke collecting hood 11. In this case, the exhaust blower 3 is integrated in the smoke collecting hood 11; in still some other embodiments, when the housing 1 includes both the smoke collecting hood 11 and the blower hood 12, the exhaust blower 3 may also partially extend into the smoke collecting hood 11.

[0083] Refer to Figure 2 , further, the upper end of the flow splitting structure 2 is not higher than the smoke passing opening 110, that is, the flow splitting structure 2 is entirely provided in the smoke collecting hood 11; it can be understood that the blower hood 12 is usually smaller than the smoke collecting hood 11. If the upper end of the flow splitting structure 2 extends into the blower hood 12 through the smoke passing opening 110, the extended part is likely to form wind resistance in the blower hood 12, resulting in an increase in noise.

[0084] Optionally, the upper end of the flow splitting structure 2 extends to the smoke passing opening 110, so that the flow splitting length of the flow splitting structure 2 is relatively large, thus having a better flow splitting effect. It should be noted that for the flow splitting structure 2 including the rotating part 21 and the fixed part 22, and the fixed part 22 is located below the rotating part 21, when the rotating part 21 is in the vertical state, the upper end of the rotating part 21 extends to the smoke passing opening 110.

[0085] However, the present design is not limited thereto. In other embodiments, referring to Figure 2 , the upper end of the flow splitting structure 2 may also be located below the smoke passing opening 110 and be disposed close to the smoke passing opening 110. In this way, the flow splitting structure 2 can also have a good flow splitting effect. Optionally, the vertical distance between the upper end of the flow splitting structure 2 and the smoke passing opening 110 is ΔH, and the height of the smoke collecting hood 11 is H. The ΔH and the H satisfy: 0 ≤ ΔH ≤ 0.1H. In this way, the upper end of the flow splitting structure 2 is disposed relatively close to the smoke passing opening 110. Further optionally, the ΔH and the H satisfy: 0 ≤ ΔH ≤ 1 / 30H. In this way, the closeness between the upper end of the flow splitting structure 2 and the smoke passing opening 110 is more guaranteed. Or rather, optionally, the ΔH satisfies 2 mm ≤ ΔH ≤ 10 mm. In this way, the upper end of the flow splitting structure 2 is disposed relatively close to the smoke passing opening 110. Further optionally, the ΔH satisfies 3 mm ≤ ΔH ≤ 5 mm. In this way, the closeness between the upper end of the flow splitting structure 2 and the smoke passing opening 110 is more guaranteed.

[0086] Referring to Figure 2, Further, in the embodiment of the flow splitting structure 2 including the rotating part 21, the rotation axis of the rotating part 21 is located between the upper edge and the lower edge of the smoke inlet 100 and is disposed close to the upper edge of the smoke inlet 100. Without loss of generality, taking the case where the rotating part 21 needs to adjust the left channel 10a to the minimum as an example, arranging the rotation axis of the rotating part 21 between the upper edge and the lower edge of the smoke inlet 100 can minimize the space between the rotating part 21 and the left channel 10a, thereby reducing the amount of oil fume escaping into this space (this part of the oil fume will stay here, which is not conducive to smoke exhaust). And arranging the rotation axis of the rotating part 21 close to the upper edge of the smoke inlet 100 can reduce the probability of the rotating part 21 being exposed to the smoke inlet 100 when the rotating part 21 rotates to the maximum rotatable angle in the relatively vertical state. Optionally, the distance between the upper edge and the lower edge of the smoke inlet 100 is L3, and the minimum distance between the rotation axis of the rotating part 21 and the upper edge of the smoke inlet 100 is L4, and L4 and L3 satisfy: 0≤L4≤0.25L3. Further optionally, L4 and L3 satisfy: 0.1L3≤L4≤0.2L3.

[0087] Refer to Figure 2 , Further, a partition beam 16 is provided on the smoke inlet 100 to divide the smoke inlet 100 into a left inlet 101 communicating with the left channel 10a and a right inlet 102 communicating with the right channel 10b; the fixing part 22 is located inside the partition beam 16, and the partition beam 16 can cover the fixing part 22 in the left-right direction. The technical solution of this embodiment avoids the two streams of oil fume entering from the left inlet 101 and the right inlet 102 from intersecting and colliding inside the partition beam 16 to form eddy currents, thereby reducing noise and improving the user experience. In addition, the covering of the fixing part 22 by the partition beam 16 can prevent the fixing part 22 from being exposed outside. Thus, even if there is dirt such as oil fume liquid attached to the fixing part 22, this dirt will not be visible to the user, avoiding affecting the user experience, and the fixing part 22 will not block the path of the oil fume entering the smoke inlet 100. Optionally, the width of the partition beam 16 in the left-right direction is L1, and the minimum distance between the fixing part 22 and the edges of the left inlet 101 and the right inlet 102 is L2, and L2 and L1 satisfy: 0≤L2≤0.25L1.

[0088] Refer to Figure 3, Further, the rotatable range α of the rotating part 21 relative to the left channel 10a and / or the right channel 10b from the vertical state is 0° to 90°. In this way, the rotatable range α of the rotating part 21 is relatively large, so that the rotating part 21 has a strong ability to adjust the size of the left channel 10a and / or the right channel 10b.

[0089] In the present utility model, when only the right burner is turned on, it is necessary to adjust the right channel 10b to the maximum and adjust the left channel 10a to the minimum at the same time; when only the left burner is turned on, it is necessary to adjust the left channel 10a to the maximum and adjust the right channel 10b to the minimum at the same time. Optionally, when it is necessary to minimize the channel formed between the rotating part 21 and the left channel 10a, it is necessary to control the rotation angle of the rotating part 21 relative to the left channel 10a from the vertical state to be β1; when it is necessary to minimize the channel formed between the rotating part 21 and the right channel 10b, it is necessary to control the rotation angle of the rotating part 21 relative to the right channel 10b from the vertical state to be β2. In an embodiment, the left channel 10a and the right channel 10b are symmetrically arranged, and both β1 and β2 are equal to β (see Figure 3 ), and the value range of β is 30° to 60°; however, this design is not limited thereto. In other embodiments, β1 and β2 may not be equal.

[0090] For the embodiment in which the housing 1 includes a smoke collecting hood 11 and a blower hood 12, and the smoke passing port 110 is communicated between the blower hood 12 and the smoke collecting hood 11, refer to Figure 3 , Further, when the free end of the rotating part 21 is closest to the left edge of the smoke passing port 110, the channel formed between the rotating part 21 and the left channel 10a is the smallest; when the free end of the rotating part 21 is closest to the right edge of the smoke passing port 110, the channel formed between the rotating part 21 and the right channel 10b is the smallest. It should be noted that the "channel is the smallest" here can be that the corresponding channel is completely closed. In this case, the free end of the rotating part 21 will abut against the left edge or the right edge of the smoke passing port 110; it can also be that the corresponding channel is not completely closed, but the opening size of the corresponding channel is minimized as much as possible. In this case, although there is a gap between the free end of the rotating part 21 and the left edge or the right edge of the smoke passing port 110, the gap width is the smallest. Optionally, refer to Figure 16, to facilitate the complete closure of the corresponding channel and avoid wind waste when using a single burner head, the flow splitting structure 2 further includes an extension portion 24 provided on the rotating portion 21. The extension portion 24 can change the length of the flow splitting structure 2 to change the size adjustment ability of the flow splitting structure 2 for the left channel 10a and the right channel 10b. Further optionally, the extension portion 24 can be slidably connected to the rotating portion 21 and can be extended and retracted by sliding; or, the extension portion 24 can be flip-connected to the rotating portion 21 and can be opened and retracted by flipping; or, the extension portion 24 can also be arranged in a folded and wrinkled shape, and its extended length can be adjusted by the degree of unfolding; of course, the extension portion 24 can also be configured in other ways that can change the length of the rotating portion 21.

[0091] However, the present design is not limited thereto. In other embodiments, two flow guiding members 17 (see Figure 4 ) can be further provided in the smoke collecting hood 11 and are respectively arranged on opposite sides of the smoke passing opening 110. The width between the two flow guiding members 17 gradually decreases in the direction close to the smoke passing opening 110, so as to smoothly guide the oil fume airflow to the smoke passing opening 110, improve the smoothness of smoke exhaust, and at the same time avoid the formation of eddy currents at the corners on both sides of the top of the smoke collecting hood 11 and reduce noise. In this embodiment, further, when the free end of the rotating portion 21 is closest to the left flow guiding member 17, the channel formed between the rotating portion 21 and the left channel 10a is the smallest; when the free end of the rotating portion 21 is closest to the right flow guiding member 17, the channel formed between the rotating portion 21 and the right channel 10b is the smallest.

[0092] Refer to Figure 4, without loss of generality, a smoke exhaust fan 3 is provided inside the outer shell 1. The smoke exhaust fan 3 is provided with a fan inlet 31 communicating with the oil fume suction channel 10 and a fan outlet communicating with the smoke exhaust port of the outer shell 1. Further, the fan inlet 31 is offset in the left-right direction. The upper end of the flow splitting structure 2 is deflected relative to the vertical direction in the left-right direction, and the deflection direction of the flow splitting structure 2 is the same as the offset direction of the fan inlet 31, so that the air intake amounts of the left channel 10a and the right channel 10b tend to be the same, that is, the smoke intake capabilities of the left channel 10a and the right channel 10b tend to be the same. In this way, when both the left and right stove heads are turned on, the left and right channels can evenly suck oil fumes, improving the oil fume suction effect of the range hood. It is worth mentioning that since the fan inlet 31 is offset in the left-right direction, without loss of generality, taking the example that the fan inlet 31 is offset to the left, in this case, the center of the fan inlet 31 is located on the left side of the vertical center plane of the fan cover 12, making the negative pressure on the left side of the smoke passing port 110 stronger than the negative pressure on the right side of the smoke passing port 110. Thus, deflecting the flow splitting structure 2 to the left by a certain angle to adjust the left channel 10a to be smaller than the right channel 10b can make the smoke intake capabilities of the left channel 10a and the right channel 10b tend to be the same, and then realize the uniform oil fume suction of the left and right channels.

[0093] In one embodiment, the offset distance of the fan inlet 31 in the left-right direction is small. In this case, the angle by which the upper end of the flow splitting structure 2 needs to be deflected is also small. Optionally, the range of the deflection angle γ of the flow splitting structure 2 is 5° to 10° (see Figure 4 ).

[0094] In one embodiment, the flow splitting structure 2 is integrally fixed relative to the outer shell 1, that is, the flow splitting structure 2 can be a shaped structure fixedly arranged in the oil fume suction channel 10 (see Figure 15 ). In this embodiment, there is no part of the flow splitting structure 2 that can rotate relative to the outer shell 1, but its upper end is configured to be in a fixed state of deflecting towards the corresponding side. In this way, the smoke intake capabilities of the left channel 10a and the right channel 10b can also tend to be the same.

[0095] In another embodiment, the flow splitting structure 2 can also be configured as a structure that can rotate at least partially relative to the outer shell 1 (see Figure 4) Further, the flow splitting structure 2 includes a rotating part 21 rotatably arranged in the oil fume suction channel 10. The rotating part 21 is used to adjust the sizes of the left channel 10a and the right channel 10b. The rotating part 21 can be positioned in a preset state where the air intake amounts of the left channel 10a and the right channel 10b tend to be the same. In the preset state, the rotating part 21 is deflected relative to the vertical direction in the left-right direction. It should be noted that in this embodiment, the flow splitting structure 2 may further include a fixing part 22 connected to the housing 1, and the rotating part 21 is rotatably connected to the fixing part 22; of course, the flow splitting structure 2 may not include the fixing part 22, and the rotating part 21 may be directly rotatably connected to the housing 1.

[0096] In the present utility model, the method for positioning the rotating part 21 in the preset state can be by mechanical cooperation or by induction control.

[0097] For the method of mechanical cooperation, optionally, one of the housing 1 and the rotating part 21 is provided with a positioning bump (not shown), and the other is provided with a positioning pit (not shown). When the rotating part 21 is in the preset state, the positioning bump is fitted with the positioning pit. It should be noted that the fitting between the positioning bump and the positioning pit does not completely lock the rotation ability of the rotating part 21. The function of this fitting is that when the rotating part 21 is not subjected to an external force or only a small external force, the rotating part 21 will not rotate, so as to maintain in the preset state. However, when the rotating part 21 is subjected to a large external force, the fitting between the positioning bump and the positioning pit will be broken, and the rotating part 21 can rotate further beyond the preset state.

[0098] For the method of induction control, optionally, the oil fume suction device further includes a driving mechanism for driving the rotation of the rotating part 21 and a position acquisition device for acquiring the rotation position of the rotating part 21. The driving mechanism is electrically connected to the position acquisition device. It is worth mentioning that the control process itself in which the controller performs corresponding control according to the monitoring results fed back by the monitoring device electrically connected to it is relatively common. In this embodiment, by adding a position acquisition device, the rotation position of the rotating part 21 is acquired, so that when the rotating part 21 rotates to the position corresponding to the preset state, the driving mechanism controls the rotating part 21 to stop at this position and maintain in the preset state.

[0099] Further, referring to Figure 8 and Figure 9, the position acquisition device includes a trigger 41 provided on the rotating part 21 and an inductor 42 provided on the fixed part 22. The drive mechanism is electrically connected to the inductor 42. When the rotating part 21 is in the preset state, the inductor 42 is triggered by the trigger 41. When the drive mechanism receives the trigger signal fed back by the inductor 42, the drive mechanism controls the rotating part 21 to stop at the preset state. However, this design is not limited thereto. In other embodiments, the position acquisition device can also be configured as a device that can obtain the rotation angle of the rotating part 21 in real time, rather than a device that is only triggered at the position corresponding to the preset state.

[0100] In one embodiment, the trigger 41 is configured as a magnet, and the inductor 42 is configured as a Hall sensor. When the rotating part 21 is in the preset state, the magnet approaches the Hall sensor, and the magnetic field intensity detected by the Hall sensor is the strongest, so it is triggered. In another embodiment, the trigger 41 is configured as a trigger projection 411, and the inductor 42 is configured as a tactile switch 421 (see Figure 9 ). When the rotating part 21 is in the preset state, the trigger projection 411 presses and triggers the tactile switch 421. In yet another embodiment, the trigger 41 is configured as a reflective part, and the inductor 42 is configured as a light sensor. The light sensor includes a transmitting head and a receiving head. When the rotating part 21 is in the preset state, the light signal emitted by the transmitting head is reflected by the reflective part and then incident on the receiving head. However, this design is not limited thereto. In other implementations, the trigger 41 and the inductor 42 can also be configured in other forms, as long as the inductor 42 can be triggered by the trigger 41 in the preset state.

[0101] For the embodiment in which the housing 1 is provided with the flow deflector 14, refer to Figure 5 and Figure 10, Further, the flow splitting structure 2 includes a rotating part 21 rotatably disposed in the oil fume suction channel 10. The rotating part 21 is used to adjust the sizes of the left channel 10a and the right channel 10b. At least a part of the rotating part 21 is located above the smoke inlet 100, and there is an avoidance structure between the front edge of the rotating part 21 and the part of the main flow guiding section 141 located above the smoke inlet 100. It can be understood that due to the inclined setting of the main flow guiding section 141, if the front edge of the rotating part 21 directly abuts against the main flow guiding section 141, the rotating part 21 cannot rotate during the left and right rotation due to interference with the main flow guiding section 141. Therefore, the technical solution of this embodiment avoids the influence of interference on the rotation of the rotating part 21 through the setting of the avoidance structure, so as to ensure that the rotating part 21 has the ability to adjust the sizes of the left channel 10a and the right channel 10b. It should be noted that in this embodiment, the flow splitting structure 2 may further include a fixing part 22 connected to the housing 1, and the rotating part 21 is rotatably connected to the fixing part 22; of course, the flow splitting structure 2 may also not include the fixing part 22, and directly rotatably connect the rotating part 21 to the housing 1.

[0102] In the present utility model, the avoidance structure may be merely a clearance structure, or a combination of a clearance structure and a flexible deformable filling structure. It can be understood that when the avoidance structure is only a clearance structure, it can also avoid the influence of interference when the rotating part 21 rotates; and when the avoidance structure is further provided with a flexible deformable filling structure on the basis of the clearance structure, it can not only avoid rotational interference, but also block the clearance structure through the flexible deformable structure, avoiding the eddy current of the cross-flow collision of the airflows on both sides at the clearance structure, thereby avoiding the generation of noise.

[0103] For the embodiment of the clearance structure, refer to Figure 5 and Figure 7 , optionally, the front edge of the rotating part 21 is provided with an avoidance notch 211 corresponding to the part of the main flow guiding section 141 located above the smoke inlet 100. The avoidance structure is configured as the avoidance notch 211. Due to the setting of the avoidance notch 211, the rotating part 21 can avoid interference with the main flow guiding section 141 during the left and right rotation, so as to ensure that the rotating part 21 has the ability to adjust the sizes of the left channel 10a and the right channel 10b.

[0104] Optionally, a reinforcing rib 212 extending in the up-and-down direction is provided in the middle of the avoidance notch 211 in the left-and-right direction. It can be understood that the thickness of the reinforcing rib 212 in the left-and-right direction is much smaller than the thickness of the rotating part 21 in the left-and-right direction. That is to say, clearance positions are formed on both sides of the reinforcing rib 212 to avoid interference with the main flow section 141 during the rotation process. Of course, the arrangement of the reinforcing rib 212 can improve the structural strength of the rotating part 21 and extend the service life of the rotating part 21. Further optionally, the protruding height of the reinforcing rib 212 is gradually decreased in the downward direction. Thus, in the direction from the back to the front, the reinforcing rib 212 also extends obliquely upward, and this shape is adapted to the extending shape of the main flow section 141, so as to more effectively avoid the interference between the reinforcing rib 212 and the main flow section 141 during the rotation process. Optionally, the reinforcing rib 212 and the rotating part 21 are integrally formed. The integrally formed structure has higher strength and is beneficial to the batch preparation of products, improving the preparation efficiency of products.

[0105] For the embodiment of the combination of the clearance structure and the flexible deformable filling structure, refer to Figures 10 to 13 , optionally, the avoidance structure includes a flexible separator 23 provided at the front edge of the rotating part 21. It should be noted that in the present invention, there is a clearance structure between the front edge of the rotating part 21 and the main flow section 141. This clearance structure can be in the form of a notch, that is, the lower part of the front edge of the rotating part 21 can be cut off, or the whole front edge of the rotating part 21 can be cut off to form an overall clearance from bottom to top. It can be understood that the flexible separator 23 has the ability of flexible deformation. During the left-and-right rotation of the rotating part 21, the flexible separator 23 can be in abutment with the main flow section 141 through self-adaptive deformation, so as to not only avoid rotational interference, but also avoid the generation of eddy currents caused by the mixing and collision of airflows on both sides at the front edge of the rotating part 21, thereby avoiding the generation of noise. Optionally, the flexible separator 23 can be but is not limited to being configured as a silicone part, a rubber part, a flexible foaming material part or a brush part.

[0106] Optionally, at least a part of the flexible separator 23 has an installation plane 231 facing the front edge of the rotating part 21, and the installation plane 231 is arranged in surface-to-surface contact with the front edge of the rotating part 21 to reduce the probability of a leakage air gap between this part of the flexible separator 23 and the front edge of the rotating part 21, and the surface-to-surface contact installation method is beneficial to improving the connection stability between the two. Further optionally, the fixing method of the installation plane 231 can adopt an adhesive fixing method or a welding fixing method, etc.

[0107] Optionally, an avoidance notch 211 is provided at the front edge of the rotating part 21 corresponding to the part of the main flow guiding section 141 located above the smoke inlet 100, and a reinforcing rib 212 extending in the up-down direction is provided in the middle of the avoidance notch 211 in the left-right direction. At least part of the flexible isolation member 23 is connected to the reinforcing rib 212. Avoidance positions are formed on both sides of the reinforcing rib 212 to avoid interference with the main flow guiding section 141 during rotation, and the reinforcing rib 212 can provide an installation attachment for part of the flexible isolation member 23. Optionally, a positioning card slot 232 is provided on the flexible isolation member 23 corresponding to the reinforcing rib 212, and the positioning card slot 232 is clamped to the reinforcing rib 212. In this way, part of the flexible isolation member 23 can be positioned and installed on the reinforcing rib 212 first, and then the installation plane 231 is fixed to the rotating part 21. Therefore, when fixing the installation plane 231, there is no need to hold the flexible isolation member 23, and the fixing and installation operation is more convenient; of course, the flexible isolation member 23 and the reinforcing rib 212 can also be connected by other connection methods.

[0108] Optionally, the upper end of the flexible isolation member 23 is arranged in a conical shape with the tip facing upward. In this way, it can not only reduce the generation of eddy currents, but also guide the condensed oil fume downward through the conical upper end, thereby preventing the accumulation of oil fume at the upper end of the flexible isolation member 23.

[0109] Furthermore, the range hood is provided with a smoke collecting plate 5 that can be opened and closed corresponding to the smoke inlet 100. The power mechanism of the smoke collecting plate 5 includes a main driving part arranged on one side of the smoke collecting plate 5 in the left-right direction, a driven driving part arranged on the other side of the smoke collecting plate 5 in the left-right direction, and a transmission rod 51 that is connected to the main driving part and the driven driving part in a transmission manner. In this way, the use of the main driving part can be reduced, the product cost can be lowered, and at the same time, the phenomenon of asynchronous driving on both sides can be avoided. In this embodiment, an avoidance through hole 233 is provided on the flexible isolation member 23 corresponding to the transmission rod 51, and the transmission rod 51 passes through the avoidance through hole 233 to prevent the flexible isolation member 23 from interfering with the arrangement of the transmission rod 51. Optionally, the flexible isolation member 23 is further provided with a slit 234 on the side of the avoidance through hole 233 away from the rotating part 21, and the slit 234 is communicated with the avoidance through hole 233 to improve the deformation ability of the avoidance through hole 233.

[0110] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A range hood, characterized in that: include: The outer shell is provided with an oil fume suction passage; as well as A diversion structure is arranged in the oil fume suction channel, and is used to divide the oil fume suction channel into a left channel and a right channel. The diversion structure includes a fixed part connected to the shell, and a rotating part rotatably connected to the fixed part. The rotating part is used to adjust the size of the left channel and the right channel.

2. The range hood according to claim 1, characterized in that: The fixing portion is located at the lower side of the rotating portion.

3. The range hood according to claim 2, characterized in that: The rotating part has two rectifying surfaces facing the left channel and the right channel respectively; The distance between the two rectifying surfaces is gradually reduced in a direction away from the fixing portion; and / or the distance between the two rectifying surfaces is equal in a front-to-rear direction.

4. The range hood according to claim 2, characterized in that: The fixing portion has two guide surfaces facing the left channel and the right channel respectively; The distance between the two guide surfaces is gradually reduced in a direction away from the rotating part; and / or the distance between the two guide surfaces is equal in a front-rear direction.

5. The range hood according to claim 2, characterized in that: A connecting groove is provided on the lower end surface of the rotating part so as to flexibly cover the upper end of the fixing part through the connecting groove.

6. The range hood according to claim 2, characterized in that: The housing comprises a guide plate, the guide plate comprises a main guide section extending upwardly and obliquely in a direction from rear to front, the main guide section is provided with a smoke inlet communicated with the oil smoke suction channel; At least part of the rotating part is located on the upper side of the smoke inlet, and a front edge of the rotating part is provided with an avoidance gap corresponding to the part of the main flow section located on the upper side of the smoke inlet; and / or a flexible isolation member is provided between the front edge of the rotating part and the part of the main flow section located on the upper side of the smoke inlet.

7. The range hood according to claim 2, characterized in that: The shell is provided with a smoke inlet communicated with the oil smoke suction channel, and at least a part of the fixing portion extends into the lower side of the smoke inlet.

8. The range hood according to claim 2, characterized in that: The housing is provided with a smoke inlet connected to the oil smoke suction channel, and a partition beam is provided on the smoke inlet to separate the smoke inlet into a left inlet connected to the left channel and a right inlet connected to the right channel; The fixing portion is located inside the partition beam, and the partition beam can cover the fixing portion in the left-right direction; and / or The rotation axis of the rotating part is located between the upper edge and the lower edge of the smoke inlet and is arranged close to the upper edge of the smoke inlet.

9. The range hood according to claim 2, characterized in that: The housing comprises a smoke collecting hood and a fan cover arranged on the upper side of the smoke collecting hood, a smoke outlet is arranged between the fan cover and the smoke collecting hood, the fixing part is arranged on the smoke collecting hood, and the upper end of the rotating part is not higher than the smoke outlet.

10. The range hood according to claim 2, characterized in that: The rotatable angle range of the rotating part relative to the left channel and the right channel from the vertical state is 0° to 90°.

11. The range hood according to claim 10, characterized in that: When the channel constructed between the rotating part and the left channel or the right channel is the smallest, the rotation angle of the rotating part relative to the left channel or the right channel from the vertical state is β, and the value range of β is 30° to 60°.

12. The range hood according to claim 2, characterized in that: The range hood also includes a smoke exhaust fan arranged in the shell, the smoke exhaust fan is provided with a fan inlet, the fan inlet is offset in the left and right directions, the rotating part has a preset state that makes the air intake volume of the left channel and the right channel tend to be consistent, in the preset state, the rotating part is deflected in the left and right directions relative to the vertical direction, and the deflection direction of the rotating part is consistent with the offset direction of the fan inlet.

13. The range hood according to claim 2, characterized in that: The housing comprises a smoke collecting hood and a fan cover arranged on the upper side of the smoke collecting hood, and a smoke outlet is arranged between the fan cover and the smoke collecting hood; The smoke collecting hood is provided with a smoke inlet communicated with the oil smoke suction channel, and the periphery of the smoke inlet is provided with an air guiding groove which is arranged in a tapered shape in the inward direction; and / or The smoke collecting hood is provided with two guide members which are arranged at opposite sides of the smoke outlet, and the width between the two guide members is gradually reduced in the direction approaching the smoke outlet.

14. The range hood according to any one of claims 1 to 13, characterized in that: The housing is provided with a mounting boss which is convex inwardly arranged, and the fixing part is mounted on the mounting boss.

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