Range hood

Abstract

The utility model discloses a range hood which comprises a shell provided with an oil smoke suction channel and a smoke inlet communicated with the oil smoke suction channel; 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 rotating part rotationally arranged in the oil smoke suction channel, and the rotating part is used for adjusting the size of the left side channel and the size of the right side channel; the rotating 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. According to the technical scheme, the oil smoke suction effect of the range hood can be effectively improved, and the probability that the rotating part of the flow dividing structure is exposed out of the smoke inlet can be reduced.

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 the 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, the user only uses 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 that generate a large amount of oil fume, such as frying and stir-frying, while the cooking appliance on the other burner performs operations that generate a small amount of oil fume, such as stewing and boiling, 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 cause the phenomenon that the oil fume on the side with a large amount of oil fume cannot be sucked clean, while the side with a small amount of oil fume has excessive wind power, 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 provide a range hood, aiming to effectively improve the oil fume extraction effect of the range hood and reduce the probability that the rotating part of the flow splitting structure is exposed at the air inlet.

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

[0007] A housing, provided with an oil fume extraction channel and an air inlet communicated with the 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 rotating part rotatably arranged in the oil fume extraction channel. The rotating part is used to adjust the sizes of the left channel and the right channel. The rotation axis of the rotating part is located between the upper edge and the lower edge of the air inlet and is arranged close to the upper edge of the air inlet.

[0009] Optionally, the distance between the upper edge and the lower edge of the air inlet is L3, and the minimum distance between the rotation axis of the rotating part and the upper edge of the air inlet is L4. The L4 and the L3 satisfy: 0≤L4≤0.25L3.

[0010] Optionally, L4 and L3 satisfy: 0.1L3 ≤ L4 ≤ 0.2L3.

[0011] Optionally, the housing includes a smoke collecting hood and a blower hood disposed above the smoke collecting hood. There is a smoke passage opening between the blower hood and the smoke collecting hood, and the upper end of the rotating part is not higher than the smoke passage opening.

[0012] Optionally, the vertical distance between the upper end of the rotating part and the smoke passage opening is ΔH, and the height of the smoke collecting hood is H. ΔH and H satisfy: 0 ≤ ΔH ≤ 0.1H.

[0013] Optionally, when the channel formed 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°.

[0014] Optionally, the flow splitting structure further includes a fixing part connected to the housing. The rotating part is rotatably connected to the fixing part, and the fixing part is located below the rotating part;

[0015] A partition beam is provided at 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;

[0016] The fixing part is located inside the partition beam, and the partition beam can cover the fixing part in the left - right direction.

[0017] Optionally, the width of the partition beam in the left - right direction is L1, and the minimum distance between the fixing part and the edges of the left inlet and the right inlet is L2. L2 and L1 satisfy: 0 ≤ L2 ≤ 0.25L1.

[0018] Optionally, at least a part of the fixing part extends into the lower side of the smoke inlet.

[0019] Optionally, the lower edge of the smoke inlet extends downward and obliquely in the direction from the rear to the front. The front - rear width of the part of the fixing part extending into the lower side of the smoke inlet gradually increases in the downward direction, so that the part of the fixing part extending into the lower side of the smoke inlet is adapted to abut against the lower edge of the smoke inlet.

[0020] Optionally, the range hood further includes a blocking member disposed below the smoke inlet and extending horizontally. The blocking member is provided with a through - hole corresponding to the fixing part, and the lower end of the fixing part passes through the through - hole.

[0021] The technical solution of the present utility model is to set 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 mixing and collision of two streams of oil fume 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, thereby 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 at the same time 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 at the same time reducing the oil fume suction capacity of the channel corresponding to the side with a small amount of oil fume, thereby improving the oil fume suction effect of the range hood; furthermore, the rotation axis of the rotating part is arranged between the upper edge and the lower edge of the smoke inlet. In this way, when a certain channel is adjusted to the smallest by the rotating part, the space between the rotating part and the flue on this side can be made as small as possible, thereby reducing the amount of oil fume escaping into this space and avoiding the retention of this part of the oil fume here, which is not conducive to smoke exhaust, and further more effectively improving the oil fume suction effect of the range hood. And setting the rotation axis of the rotating part close to the upper edge of the smoke inlet can reduce the probability of the rotating part being exposed at the smoke inlet when the rotating part rotates to the maximum rotatable angle in a relatively vertical state. It can be understood that there will inevitably be condensed oil fume liquid attached to the rotating part, and being exposed at the smoke inlet will affect the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 Structural schematic diagram of an embodiment of the range hood of the present utility model;

[0024] Figure 2 is Figure 1 front view schematic diagram of the range hood in

[0025] Figure 3 is Figure 1 rear view schematic diagram of the range hood in

[0026] Figure 4 is Figure 1 front view schematic diagram of the range hood in

[0027] Figure 5 is Figure 1Partial cross-sectional schematic diagram of a range hood;

[0028] Figure 6 is Figure 1 Schematic diagram of the structure of the back panel of a range hood;

[0029] Figure 7 is Figure 1 Schematic diagram of the structure of the flow splitting structure of a range hood;

[0030] Figure 8 is Figure 7 Rear view schematic diagram of the flow splitting structure;

[0031] Figure 9 is Figure 8 Enlarged schematic diagram at position A;

[0032] Figure 10 Cross-sectional schematic diagram of another embodiment of the range hood of the present utility model;

[0033] Figure 11 is Figure 10 Schematic diagram of the structure of the flow splitting structure of a range hood;

[0034] Figure 12 is Figure 11 Schematic diagram of the structure of the flexible spacer of the flow splitting structure;

[0035] Figure 13 Explosion schematic diagram of another embodiment of the range hood of the present utility model;

[0036] Figure 14 is Figure 13 Enlarged schematic diagram at position B;

[0037] Figure 15 Schematic diagram of the structure of another embodiment of the flow splitting structure of the range hood of the present utility model;

[0038] Figure 16 Schematic diagram of still another embodiment of the range hood of the present utility model.

[0039] Explanation of the reference numerals in the drawings:

[0040] 1. Housing; 11. Smoke collecting hood; 12. Fan housing; 110. Smoke passing opening; 100. Smoke inlet; 101. Left inlet; 102. Right inlet; 10. Oil fume suction channel; 10a. Left channel; 10b. Right channel; 13. Back panel; 131. Mounting boss; 14. Deflector; 141. Main deflector section; 142. Sub-deflector section; 103. Air guide sink; 15. Blocking member; 151. Passing opening; 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 projection; 22c. Limit card slot; 23. Flexible isolation member; 231. Mounting plane; 232. Positioning card slot; 233. Avoidance opening; 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

[0041] 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

[0042] 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0043] 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.

[0044] In addition, if descriptions such as "first" and "second" are involved in the embodiments of the present utility model, 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 specifying the quantity of the indicated technical features. Thus, 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 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.

[0045] The present utility model provides an oil fume extractor.

[0046] Referring to Figures 1 to 3 , in an embodiment of the present utility model, the oil fume extractor includes:

[0047] A housing 1 provided with an oil fume suction channel 10; and

[0048] A flow splitting structure 2 disposed in the oil fume suction channel 10 for dividing the oil fume suction channel 10 into a left channel 10a and a right channel 10b.

[0049] 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 suction channel 10. The flow splitting structure 2 is usually disposed near the smoke inlet 100 to divide the oil fume suction 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 suction channel 10 from both sides of the smoke inlet 100, improving the smoothness of the oil fume passing through the oil fume suction channel 10, thereby improving the smoking effect of the oil fume extractor and reducing noise.

[0050] In one embodiment, the flow splitting structure 2 can be configured as a structure that is integrally fixed relative to the housing 1, that is, the flow splitting structure 2 can be a shaped structure fixed in the oil fume suction channel 10 (see Figure 15 ). However, this design is not limited to this. 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.

[0051] 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 diversion 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 adjusting the sizes of all positions in the left channel 10a and the right channel 10b, but refers to adjusting the sizes of the minimum connecting cross-sections of the left and right channels and the right channel 10b. The minimum connecting cross-section is the throat of the corresponding channel, and its size is directly proportional to the smoking ability of the corresponding channel.

[0052] When the rotating part 21 rotates relative to the left channel 10a, it can reduce the oil fume suction ability of the left channel 10a and increase the oil fume suction ability of the right channel 10b at the same time. When the rotating part 21 rotates relative to the right channel 10b, it can reduce the oil fume suction ability of the right channel 10b and increase the oil fume suction ability of the left channel 10a at the same time. 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 decrease the channel corresponding to the side with a small amount of oil fume, thereby improving the oil fume suction ability of the channel corresponding to the side with a large amount of oil fume and 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.

[0053] 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.

[0054] 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.

[0055] For the embodiment indirectly connected to the housing 1, the diversion 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 serves to separate the oil fume passage 10, thereby being able 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 improving 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, prevent the oil fume from depositing on the driving structure, and thus extend the service life of the driving mechanism.

[0056] Referring to Figure 5 and Figure 6 , further, the housing 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 inside the housing 1 above the mounting boss 131 will flow downward around the mounting boss 131, thereby preventing the oil liquid from leaking to the outside of the range hood from the connection between the fixing part 22 and the housing 1. Optionally, the mounting boss 131 is provided on the back plate 13 of the housing 1. Further optionally, a part of the back plate 13 bulges inward 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.

[0057] 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, thereby restricting the mixing and collision of these two streams of oil fume, reducing the eddy current, and improving 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.

[0058] 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.

[0059] 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 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 away from the fixing portion 22 and reducing the noise. Optionally, the ends of the two rectifying surfaces 21a away from the fixing portion 22 are connected to form a conical tip, so that not only the generation of eddy current can 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.

[0060] Further, the distance between the two rectifying surfaces 21a is equal in the front-back direction, so that the rectifying capabilities of the rectifying surfaces 21a at various positions in the front-back direction are equivalent, and the probability of generating eddy current on the rectifying surfaces 21a is reduced.

[0061] 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.

[0062] 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, so that the oil fume airflow can be more smoothly guided to the rotating portion 21.

[0063] Further, the distance between the two guiding surfaces 22a is equal in the front-back direction, so that the guiding capabilities of the guiding surfaces 22a at various positions in the front-back direction are equivalent, and the probability of generating eddy current on the guiding surfaces 22a is reduced.

[0064] 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 rotational jamming.

[0065] Optionally, the connecting groove 21b is arc-shaped to adapt to the rotation trajectory of the rotating part 21, so as to reduce the gap between the rotating part 21 and the fixed part 22, and further reduce 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.

[0066] 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, so as to improve the size adjustment ability of the rotating part 21 for the left channel 10a and the right channel 10b.

[0067] 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 in the up-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.

[0068] 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.

[0069] Further, the housing 1 includes a deflector 14. The deflector 14 includes a main deflector section 141 that extends upwardly and obliquely in a 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 both 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.

[0070] Optionally, a wind guiding sink 103 is provided on the periphery of the smoke inlet 100 and is tapered in an inward direction to further improve the smoking effect of the smoke inlet 100.

[0071] Further, 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 a 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 a direction from the rear to the front is formed below the smoke inlet 100.

[0072] Further, 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 a 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 oil fume air flow from being mixed and collided at the gap between the fixing portion 22 and the secondary deflector section 142 to generate eddy currents, and on the other hand, it can also improve the installation stability of the fixing portion 22.

[0073] However, the present design is not limited thereto. In other embodiments, referring to Figure 13 and Figure 14, to reduce the probability of the oil fume airflow colliding and forming vortices on the lower side of the fixed part 22, the range hood may further include a blocking member 15 provided below 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 passes 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.

[0074] 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 above the smoke collecting hood 11. The smoke inlet 100 is provided in the smoke collecting hood 11, the smoke outlet is provided in 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; and in some other further 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.

[0075] 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 a wind resistance in the blower hood 12, resulting in an increase in noise.

[0076] 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, thereby 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.

[0077] However, this 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 arranged 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 arranged relatively close to the smoke passing opening 110. Further optionally, the ΔH and the H satisfy: 0≤ΔH≤1 / 30H. In this way, the degree of 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 2mm≤ΔH≤10mm. In this way, the upper end of the flow splitting structure 2 is arranged relatively close to the smoke passing opening 110. Further optionally, the ΔH satisfies 3mm≤ΔH≤5mm. In this way, the degree of closeness between the upper end of the flow splitting structure 2 and the smoke passing opening 110 is more guaranteed.

[0078] 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 example that the rotating part 21 needs to adjust the left channel 10a to the minimum, configuring 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 disposing 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 a 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.

[0079] 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, so that even if there is dirt such as oil fume liquid attached to the fixing part 22, this dirt will not be shown 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.

[0080] 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 sizes of the left channel 10a and / or the right channel 10b.

[0081] In the present utility model, when only the right burner is turned on, the right channel 10b needs to be adjusted to the maximum, and at the same time, the left channel 10a needs to be adjusted to the minimum; when only the left burner is turned on, the left channel 10a needs to be adjusted to the maximum, and at the same time, the right channel 10b needs to be adjusted to the minimum. 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, 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.

[0082] For an embodiment in which the housing 1 includes a smoke collecting hood 11 and a blower hood 12, and a 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 may mean completely closing the corresponding channel. 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 may also mean not completely closing the corresponding channel, but trying to minimize the opening size of the corresponding channel. 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 part 24 provided on the rotating part 21. The extension part 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 part 24 can be slidably connected to the rotating part 21 and can be telescoped by sliding; or, the extension part 24 can be flip-connected to the rotating part 21 and can be opened and retracted by flipping; or, the extension part 24 can also be arranged in a pleated and folded shape and its extended length can be adjusted by the degree of unfolding; of course, the extension part 24 can also be configured in other ways that can change the length of the rotating part 21.

[0083] However, this design is not limited thereto. In other embodiments, two diversion 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 diversion 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 part 21 is closest to the left diversion member 17, 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 diversion member 17, the channel formed between the rotating part 21 and the right channel 10b is the smallest.

[0084] Refer to Figure 4, without loss of generality, a smoke exhaust fan 3 is provided inside the housing 1. The smoke exhaust fan 3 is provided with a fan inlet 31 communicating with the oil suction channel 10 and a fan outlet communicating with the smoke exhaust port of the housing 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 of the left channel 10a and the right channel 10b tends to be consistent, that is, the smoke intake capacity of the left channel 10a and the right channel 10b tends to be consistent. In this way, when both the left and right burners 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 fan inlet 31 being offset to the left as an example, 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 capacity of the left channel 10a and the right channel 10b tend to be consistent, and then realize the uniform oil fume suction of the left and right channels.

[0085] 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 deflection angle γ of the flow splitting structure 2 ranges from 5° to 10° (see Figure 4 ).

[0086] In one embodiment, the flow splitting structure 2 is integrally fixed relative to the housing 1, that is, the flow splitting structure 2 can be a shaped structure fixedly arranged in the oil 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 housing 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 capacity of the left channel 10a and the right channel 10b can also tend to be consistent.

[0087] In another embodiment, the flow splitting structure 2 can also be configured as a structure that can rotate at least partially relative to the housing 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.

[0088] 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.

[0089] 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 embedded and matched with the positioning pit. It should be noted that the embedded cooperation between the positioning bump and the positioning pit does not completely lock the rotation ability of the rotating part 21. The function of this embedded cooperation is that when the rotating part 21 is not subjected to external force or only subjected to 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 embedded cooperation between the positioning bump and the positioning pit will be broken, and the rotating part 21 can rotate further beyond the preset state.

[0090] 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.

[0091] 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 driving 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 driving mechanism receives the trigger signal fed back by the inductor 42, the driving 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 acquire 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.

[0092] 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 strength 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.

[0093] 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-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.

[0094] 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 on the rotation of the rotating part 21; 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 generation of vortices caused by the cross-collision of airflows on both sides at the clearance structure, thereby avoiding the generation of noise.

[0095] 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-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.

[0096] Optionally, 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. It can be understood that the thickness of the reinforcing rib 212 in the left-right direction is much smaller than the thickness of the rotating part 21 in the left-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 rear 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.

[0097] 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 spacer 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 spacer 23 has the ability of flexible deformation. During the left-right rotation of the rotating part 21, the flexible spacer 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 eddies caused by the mixing and collision of airflows on both sides at the front edge of the rotating part 21, thus avoiding the generation of noise. Optionally, the flexible spacer 23 can be but is not limited to being configured as a silica gel part, a rubber part, a flexible foam material part or a brush part.

[0098] Optionally, at least part of the flexible spacer 23 has a mounting plane 231 facing the front edge of the rotating part 21, and the mounting 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 appearing between this part of the flexible spacer 23 and the front edge of the rotating part 21, and the surface-to-surface contact mounting method is beneficial to improving the connection stability between the two. Further optionally, the fixing method of the mounting plane 231 can adopt an adhesive fixing method or a welding fixing method, etc.

[0099] 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 and down direction is provided in the middle of the avoidance notch 211 in the left and right directions. 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 prevent 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, the flexible isolation member 23 is provided with a positioning card slot 232 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, it is not necessary 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.

[0100] Optionally, the upper end of the flexible isolation member 23 is tapered 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 tapered upper end, thereby preventing the accumulation of oil fume at the upper end of the flexible isolation member 23.

[0101] 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 provided on one side of the smoke collecting plate 5 in the left and right directions, a driven driving part provided on the other side of the smoke collecting plate 5 in the left and right directions, 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 the phenomenon of asynchronous driving on both sides can be avoided. In this embodiment, the flexible isolation member 23 is provided with an avoidance opening 233 corresponding to the transmission rod 51, and the transmission rod 51 passes through the avoidance opening 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 opening 233 away from the rotating part 21, and the slit 234 is communicated with the avoidance opening 233 to improve the deformation ability of the avoidance opening 233.

[0102] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. 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 direct / indirect application 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 housing is provided with an oil fume suction channel and a smoke inlet connected to the oil fume suction channel; 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 rotating part rotatably arranged in the oil fume suction channel, and the rotating part is used to adjust the size of the left channel and the right channel. 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.

2. The range hood according to claim 1, characterized in that: The distance between the upper edge and the lower edge of the smoke inlet is L3, the minimum distance between the rotation axis of the rotating part and the upper edge of the smoke inlet is L4, and L4 and L3 satisfy: 0≤L4≤0.25L3.

3. The range hood according to claim 2, characterized in that: The L4 and the L3 satisfy: 0.1L3≤L4≤0.2L3.

4. The range hood according to claim 1, 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, and the upper end of the rotating part is arranged not higher than the smoke outlet.

5. The range hood according to claim 4, characterized in that: A vertical distance between the upper end of the rotating part and the smoke outlet is ΔH, a height of the smoke collecting hood is H, and ΔH and H satisfy: 0≤ΔH≤0.1H.

6. The range hood according to claim 1, 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°.

7. The range hood according to any one of claims 1 to 6, characterized in that: The flow-dividing structure further comprises a fixed part connected to the housing, the rotating part is rotatably connected to the fixed part, and the fixed part is located at the lower side of the rotating part; A partition 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; The fixing portion is located inside the partition beam, and the partition beam can cover the fixing portion in the left-right direction.

8. The range hood according to claim 7, characterized in that: The width of the partition beam in the left-right direction is L1, the minimum distance between the fixing portion and the edges of the left inlet and the right inlet is L2, and L2 and L1 satisfy: 0≤L2≤0.25L1.

9. The range hood according to claim 7, characterized in that: At least a portion of the fixing portion extends into the lower side of the smoke inlet.

10. The range hood according to claim 9, characterized in that: The lower edge of the smoke inlet extends downwardly in a direction from the rear to the front, and the front-to-rear width of the portion of the fixing portion extending into the lower side of the smoke inlet is gradually increased in the downward direction, so that the portion of the fixing portion extending into the lower side of the smoke inlet is adapted to abut against the lower edge of the smoke inlet; or, The range hood further comprises a blocking member which is arranged at the lower side of the smoke inlet and extends in the transverse direction. The blocking member is provided with a through opening corresponding to the fixing portion, and the lower end of the fixing portion is inserted through the through opening.

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