Range hood

Abstract

The utility model relates to a range hood which comprises an exhaust fume collecting hood and a panel which can be arranged on the front side of the exhaust fume collecting hood in a front-back deflection mode, an air inlet plate is arranged on the front portion of the exhaust fume collecting hood, and the front side face of the air inlet plate is provided with a smoke buffering cavity formed by partially recessing backwards. The left-right size of at least the upper area of the smoke buffering cavity is gradually reduced from bottom to top, a main air inlet and an auxiliary air inlet are further formed in the area where the smoke buffering cavity is located, and the auxiliary air inlet is located above the main air inlet. The range hood has the advantages that the problem of oil fume escape caused by the fact that oil fume cannot be sucked and discharged in time can be effectively solved.

Description

Technical Field

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

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. Due to kitchen space limitations, a thin range hood with a small front-to-back depth has emerged. For example, Chinese utility model patent No. CN211372530U discloses such a range hood. The range hood includes a housing and a fan system disposed within the housing. The lower portion of the housing has a vertically extending smoke inlet chamber. A smoke inlet port communicating with the smoke inlet chamber is formed on the front side wall of the lower portion of the housing. A smoke baffle extending laterally along the smoke inlet port is rotatably connected to the smoke inlet port. The upper portion of the housing has a smoke collection chamber communicating with the smoke inlet chamber. The smoke collection chamber extends forward to form an installation chamber for mounting the fan system. The rear wall of the range hood housing is mounted against a wall. Because the smoke inlet chamber at the lower portion of the housing extends vertically, the width of the smoke inlet chamber in the front-to-back direction can be made relatively thin. The chamber can extend downward to be sufficiently close to the stove and the source of oil smoke, so that oil smoke is quickly drawn into the smoke inlet chamber and discharged upward upon generation, thereby improving the oil smoke extraction effect.

[0003] While the range hood described in the aforementioned patent optimizes space utilization and basic extraction efficiency through its thin design and vertical smoke intake, it still suffers from significant deficiencies in handling the large volumes of oil smoke generated instantly during peak cooking times (e.g., stir-frying). The range hood primarily relies on the lower smoke intake for fume extraction and exhaust. When the amount of oil smoke increases dramatically within a short period of time, the suction power of the lower smoke intake may not be sufficient to instantly remove all the oil smoke. Due to the lack of buffer space in the front of the fume hood (especially when the smoke baffle is open) in the air inlet path, oil smoke that is not promptly extracted and exhausted has nowhere to be temporarily stored or effectively directed, making it highly likely to spread in front of the smoke intake and escape into the kitchen environment. Furthermore, since the smoke intake is concentrated in the lower area of the fume hood, when a large volume of oil smoke rises instantly and may pass over the range of the lower smoke intake, the lack of auxiliary smoke intakes in the upper area to provide "relay" extraction and exhaust prevents the rising oil smoke from being quickly captured. In general, the existing range hood structure is not adaptable enough to the instantaneous peak load generated by oil smoke. When dealing with the inevitable and drastic fluctuations in oil smoke volume during the cooking process, there is a risk of oil smoke escape, affecting the final smoke purification effect and user experience. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a range hood which can effectively prevent the problem of oil smoke escaping due to the failure of oil smoke to be sucked and discharged in time, in view of the current status of the existing technology.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a range hood, including a smoke hood and a panel arranged on the front side of the smoke hood so as to be deflected forward and backward, the front part of the smoke hood is provided with an air inlet plate, the front side surface of the air inlet plate has a smoke buffer chamber formed by a partial backward recess, the left and right dimensions of at least the upper area of the smoke buffer chamber gradually decrease from bottom to top, and the area where the smoke buffer chamber is located is also provided with a main air inlet and an auxiliary air inlet, and the auxiliary air inlet is located above the main air inlet.

[0006] As an improvement, the lower region of the smoke buffer chamber is a rectangular area with consistent left and right dimensions. The left and right dimensions of the upper region of the smoke buffer chamber gradually decrease upward from the aforementioned rectangular area. The main air inlet extends in the left-right direction, and at least part of the main air inlet is located in the lower region of the smoke buffer chamber. The auxiliary air inlet is arranged in the upper region of the smoke buffer chamber. The lower rectangular region of the smoke buffer chamber provides a stable, high-flow air inlet channel, and the upper tapered structure enhances negative pressure. The use of a zoned air inlet design (the main air inlet draws in the main oil smoke, and the auxiliary air inlet draws in escaping oil smoke) can effectively improve the efficiency of oil smoke extraction and exhaust.

[0007] In order to increase the area of the main air inlet as much as possible, maximize the lateral coverage, and reduce the escape of oil smoke on both sides, the left and right ends of the main air inlet extend to the left and right side edges of the lower area of the smoke buffer chamber respectively.

[0008] As a further improvement, part of the main air inlet is located in the upper area of the smoke buffer chamber. The above structural design can further increase the air intake area of the main air inlet and expand the effective range of the main air inlet, thereby enhancing the ability to capture medium and high-level oil smoke.

[0009] In order to increase the area of the smoke buffer chamber as much as possible and ensure the smoke collection effect, the top edge of the upper area of the smoke buffer chamber is adjacent to the top edge of the air inlet plate.

[0010] As an improvement, the air inlet area of the main air inlet gradually increases from the left and right ends to the middle area, and the upper edge of the main air inlet is constructed to be inclined upward from the left and right ends to the middle position, thereby forming an inverted V-shaped structure.

[0011] The above-mentioned "upper edge of the main air inlet tilted upward from the left end (or right end) to the middle position" can be an edge structure composed of a straight line, or an edge structure composed of at least two straight lines (with different inclination angles) connected in sequence, or an edge structure composed of one or more curved lines, etc., as long as it has an overall trend of "tilting upward from the left end (or right end) to the middle position".

[0012] The above-mentioned "upper edge of the inverted V-shaped structure" is not limited to the tops of the two left and right inclined sections of the upper edge directly intersecting to form a corresponding angle, but can also be: the tops of the two left and right inclined sections are connected by a horizontally extending straight edge or curved edge.

[0013] The utility model solves the problem that the suction force in the middle of the existing thin range hood air inlet is weak and easily obstructed by the physical structure through the coordinated design of the "inverted V-shaped upper edge" and "increased air inlet area in the middle" of the air inlet, significantly optimizes the air intake efficiency distribution, especially strengthens the negative pressure and cyclone intensity in the core area of the oil fume, and eliminates the interference of the middle oil guide plate on the airflow, thereby achieving maximum suction in the central area where the oil fume is most intensely generated and needs to be captured most efficiently, ultimately effectively reducing the oil fume escape rate and improving the overall suction and exhaust efficiency.

[0014] In order to prevent the oil on the back side of the air inlet plate from directly dripping onto the upper edge of the air inlet, the upper edge of the main air inlet is further provided with a first oil guide flange that is folded and extended backward.

[0015] In order to further improve the oil fume absorption effect of the auxiliary air inlet on the upper part of the air inlet plate, there are at least two auxiliary air inlets arranged in sequence along the left and right directions, and each of the auxiliary air inlets is a strip-shaped opening extending along the left and right directions.

[0016] In order to smoothly guide the oil on the back of the air inlet plate to both sides and to the bottom, the main air inlet also includes left and right opposite side edges, both of which extend vertically and have second oil-guiding flanges that fold backward and extend, and the left and right ends of the first oil-guiding flange are connected to the tops of the left and right second oil-guiding flanges.

[0017] To ensure consistent front-to-back dimensions of the fume hood and achieve a thin structural design, the air inlet plate extends vertically. Together with the rear sidewall of the fume hood, it defines a vertically extending air inlet chamber. The rear sidewall of the smoke buffer chamber also extends vertically and is a straight wall. The straight wall design of the smoke buffer chamber reduces oil and dirt adhesion, facilitating cleaning. It also ensures that the front-to-back dimensions of the fume hood's internal air inlet chamber are as consistent as possible, ensuring stable airflow within the chamber.

[0018] Compared with the existing technology, the advantages of the present invention are as follows: a smoke buffer chamber that is recessed backward is set on the air inlet plate at the front of the smoke hood, which provides a key structural "temporary storage space" for the sudden surge of oil smoke. When the instantaneous suction of the main air inlet is saturated, the oil smoke that has not been inhaled in time can be effectively intercepted and temporarily accommodated in the buffer chamber, avoiding its disorderly diffusion and escape to the kitchen environment directly in front of the air inlet, which gains processing time for the fan system. On this basis, the design of the left and right dimensions of the upper area of the smoke buffer chamber gradually shrinking from bottom to top conforms to the fluid characteristics of the natural rise of oil smoke, forming a guide channel that converges upward. This structural design can effectively restrain and guide the oil smoke temporarily stored in the cavity and the newly generated rising oil smoke, so that it flows to the auxiliary air inlet area at the upper part in a more concentrated and orderly manner, greatly improving the capture efficiency. The lower main air inlet is responsible for normal and low-altitude oil smoke; when a large amount of oil smoke rises instantly and exceeds the range of the main air inlet, the upper auxiliary air inlet can intervene in time to form a secondary capture of the rising oil smoke, completely solving the problem of oil smoke escaping beyond a single air intake. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the air inlet plate of the range hood according to an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the air inlet plate of the range hood according to an embodiment of the utility model from another angle;

[0021] Figure 3 This is a front view of the air inlet plate of the range hood according to an embodiment of the present utility model;

[0022] Figure 4 for Figure 3 A cross-sectional view of the air inlet plate taken along AA;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the range hood according to an embodiment of the present invention, with the panel in a closed state;

[0024] Figure 6 A vertical cross-sectional view of the range hood according to an embodiment of the present invention taken along the front-to-back direction;

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of the range hood according to the embodiment of the utility model after omitting components such as the panel;

[0026] Figure 8 This is a schematic diagram of the three-dimensional structure of the range hood according to an embodiment of the present invention, in which the panel is in a forward-deflected and open state. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0028] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0029] Figures 1-8 A preferred embodiment of the range hood of the present invention is shown. The range hood includes a casing and a fan system 11 disposed within the casing. The fan system is generally a centrifugal fan. The casing generally includes a fan frame 10 and a fume hood 20 disposed at the bottom of the fan frame 10. The inner cavity of the fan frame 10 is connected to the inner cavity of the fume hood 20. An air inlet is provided on the front side wall of the fume hood 20, through which external smoke can enter the fume hood 20. The centrifugal fan is disposed within the fan frame 10. When the centrifugal fan is in operation, negative pressure is generated, and external oil smoke can be sucked into the fume hood 20 through the air inlet. An oil cup (not shown in the accompanying drawings) is provided at the bottom of the fume hood 20. The oil cup is in the shape of an elongated strip extending left and right, and is used to receive oil stains flowing down from the fume hood 20. The front portion of the smoke hood 20 is further provided with a panel 50 that can pivot forward and backward relative to the smoke hood 20. This panel 50 is connected to the main body of the smoke hood 20 via a hinge mechanism. Specifically, the panel 50 can pivot forward to open the aforementioned air inlet and pivot backward to block and close the aforementioned air inlet. The hinge mechanism for pivoting the smoke deflector can be a conventional hinge mechanism known in the art and will not be further described here.

[0030] See also Figure 7 In this embodiment, the front and rear depths of the smoke hood 20 are basically the same, that is, when the panel 50 is in the covered state, the smoke hood 20 as a whole is basically a flat box extending vertically. The air inlet chamber defined in the smoke hood 20 is also basically a chamber structure extending vertically. The left and right dimensions of the smoke hood 20 are larger than the left and right dimensions of the fan frame 10. Therefore, the left and right sides of the smoke hood 20 have shoulders protruding to the left or right respectively relative to the fan frame 10. A connection port is provided at the top of the smoke hood 20 that communicates with the bottom of the fan frame 10, so that the vertical air inlet chamber formed inside the smoke hood 20 is connected to the inner cavity of the fan frame 10.

[0031] See also Figure 1-Figure 4 as well as Figure 7An air inlet plate 30 is provided at the front opening of the fume hood 20. As can be understood, this air inlet plate 30 forms the front sidewall of the fume hood 20. The air inlet plate 30, along with the left and right sidewalls and rear wall of the fume hood, defines a vertically extending air inlet chamber 21. The air inlets defined in the air inlet plate 30 include a main air inlet 31 at the bottom and an auxiliary air inlet 32 at the top.

[0032] The panel 50 of this embodiment basically deflects forward and backward with its top edge (or a horizontal axis parallel to its top edge) as the rotation axis. Specifically, the panel 50 has at least a first state and a second state as its rotational position relative to the smoke hood changes: in the first state, the panel 50 covers the front of the smoke hood 20 and is basically in a vertical extension state, and the upper edge of the panel 50 is basically flush with the top of the smoke hood 20, while the lower edge extends to the bottom of the smoke hood 20, thereby blocking the main air inlet 31 and the auxiliary air inlet 32 together. Generally speaking, an oil cup is usually provided at the bottom of the smoke hood 20. The panel 50 may or may not block the oil cup, but the lower edge of the panel 50 extends at least to the position of the oil cup of the smoke hood 20, thereby completely blocking the air inlet plate 30. In the second state, the panel 50 is tilted forward relative to the smoke hood 20 and opened, exposing the air inlet plate 30. Of course, the main air inlet 31 and auxiliary air inlet 32 on the air inlet plate 30 are also exposed to facilitate the intake and exhaust of oil fumes. The panel 50 of this embodiment is a single piece of glass. The hinge mechanism for opening and closing the panel 50 is located at the top of the smoke hood 20, rather than in the middle. This design effectively avoids oil fume leakage that would occur if the panel were located in the middle (when open), and does not affect the intake of oil fumes, i.e., the smooth flow field. Furthermore, the structural design of the large panel effectively collects oil fumes when it is open, reducing their escape.

[0033] In some embodiments, a local area on the front side of the air inlet plate 30 is recessed backward to form a smoke buffer chamber 33. Figure 1As shown, the lower region of the smoke buffer chamber 33 of the air inlet plate 30 is essentially a rectangular area, meaning that the left and right dimensions of this area are essentially the same. The lower region of the smoke buffer chamber 33 extends left and right to the left and right edges of the air inlet plate 30. Correspondingly, the main air inlet 31 at the lower portion of the air inlet plate 30 extends left and right, with a portion of the main air inlet 31 also occupying the lower region of the smoke buffer chamber 33. At the same time, the two opposing side edges 312 of the main air inlet 31 also extend essentially vertically and are adjacent to the left and right edges of the lower region of the smoke buffer chamber 33. The upper region of the smoke buffer chamber 33 resembles an isosceles trapezoid, meaning that the left and right dimensions of the upper region of the smoke buffer chamber 33 gradually decrease from bottom to top, forming an inverted V-shaped smoke buffer space. The upper portion of the main air inlet 31 on the air inlet plate 30 is located in the upper area of the smoke buffer chamber 33 , and the auxiliary air inlet 32 of the air inlet plate 30 is also located in the upper area of the smoke buffer chamber 33 and above the main air inlet 31 .

[0034] The top edge of the upper area of the smoke buffer chamber 33 is adjacent to the top edge of the air inlet plate 30, thereby increasing the area of the smoke buffer chamber as much as possible to ensure the smoke collection effect.

[0035] In some embodiments, two auxiliary air inlets 32 are spaced apart, each extending in a strip-shaped pattern. These two auxiliary air inlets 32 correspond to the dual cooking zones, enhancing the efficiency of collecting top fume. During cooking, large amounts of rising fume can be temporarily stored in the fume buffer chamber 33. Fumes that are not absorbed or exhausted by the main air inlet 31 are guided toward the auxiliary air inlets 32 by the flue gas buffer chamber 33's tapering structure, where they are drawn in through the upper auxiliary air inlet 32, preventing them from escaping.

[0036] The top edge 300 and left and right edges 301 of the air inlet plate 30 protrude forward relative to the main body of the air inlet plate 30, providing support when closed with the panel 50. This forward-protruding design of the top edge 300 and left and right edges 301 of the air inlet plate 30 also causes the main body of the air inlet plate 30 to be relatively concave, forming a secondary buffer chamber 34 that enhances the buffering effect of oil smoke.

[0037] The air inlet area of the main air inlet 31 of the air inlet plate 30 of this embodiment gradually increases from the left and right ends to the middle area, and the upper edge 310 of the main air inlet 31 is constructed as follows: it tilts upward from the left and right ends to the middle position, thereby forming an inverted V-shaped structure. Among them. The above-mentioned "upper edge 310 of the main air inlet 31 tilted upward from the left end (or right end) to the middle position" can be an edge structure composed of a straight line, or an edge structure composed of at least two straight lines (with different inclination angles) connected in sequence, or an edge structure composed of one or more curved lines, etc., as long as it has a tendency of "tilting upward from the left end (or right end) to the middle position" as a whole. In addition, the "upper edge 310 of the inverted V-shaped structure" can refer to the tops of the two inclined left and right sections of the upper edge 310 directly intersecting to form a corresponding angle, such as Figure 1 The upper edge 310 shown in FIG may also be: the tops of the two inclined sections are connected by a horizontally extending straight edge or a curved edge.

[0038] See also Figure 3 The inclination angle formed by the upper edge 310 of the main air inlet 31 relative to the horizontal direction should be reasonably designed. If the angle is too small (<5°), the oil may not be effectively diverted, and if the angle is too large (≥60°), the structure may become abrupt and occupy space, and it may not effectively gather the oil smoke. For this reason, in some embodiments, the value range of the inclination angle formed by the upper edge 310 of the main air inlet 31 relative to the horizontal direction should be reasonably designed. Specifically, the inclination angle of the upper edge 310 of the main air inlet 31 relative to the horizontal direction is recorded as α, where the value range of α is: 5°≤α<60°, preferably, α=10°.

[0039] The upper edge 310 of the main air inlet 31 of the air inlet plate 30 of this embodiment is inclined upward from both ends to the middle (inverted V shape), and the structure in which the air inlet area gradually increases from both ends to the middle causes the opening height and area of the middle region of the main air inlet 31 to increase synchronously, which greatly improves the air inlet flux in this region and significantly enhances the suction intensity of the fan system 11 in the core region (corresponding to the top of the stove) where the oil smoke is most concentrated. At the same time, since the upper edge of the main air inlet 31 gradually inclines upward from both sides to the middle, the airflow gradually gathers toward the middle during the process of being sucked into the main air inlet 31. In particular, since the air inlet area of the main air inlet 31 becomes larger and larger from both sides to the middle, according to Bernoulli's principle, the pressure is smaller where the air flow velocity is faster, and the airflow on the upper side of the left and right regions of the main air inlet 31 will also gather toward the middle. At this time, the airflow in front of the main air inlet 31 can form a rotating capture cyclone (such as Figure 7 The diffused oil smoke roll is actively sucked into the cavity, overcoming the problem of insufficient suction caused by wind resistance or oil guide plate obstruction in the traditional small middle opening, and preventing the oil smoke from escaping from both sides.

[0040] In some embodiments, the upper edge 310 of the main air inlet 31 further includes a first oil-guiding flange 311 that folds backward and extends. This flange 311, like the upper edge 310 of the main air inlet 31, is also roughly shaped like an inverted V. To smoothly guide the oil from both sides to the bottom, the left and right side edges 312 of the main air inlet 31 each include a second oil-guiding flange 313 that folds backward and extends. The left and right ends of the first oil-guiding flange 311 connect with the tops of the left and right second oil-guiding flanges 313. This allows oil on the back of the air inlet plate 30 to be directed to the left and right sides via the first oil-guiding flange 311 and then downward via the second oil-guiding flange 313 to the oil cup at the bottom, thereby preventing oil on the back of the air inlet plate 30 from dripping directly onto the upper edge 310 of the main air inlet 31.

[0041] The air inlet plate 30 utilizes the inverted V-shaped upper edge 310 structure itself in conjunction with the above-mentioned first oil-guiding flange 311 to guide oil along the trend, and condensed oil droplets can slide to the left and right sides along the inclined surface. This effectively avoids the need for an additional downward-extending oil guide plate in the middle area of the main air inlet 31 for oil guidance in the prior art. After removing this physical obstacle (oil guide plate), the air intake in the key area in the middle of the main air inlet 31 is unobstructed, and the airflow can enter smoothly, concentratedly and at high speed, maximizing the utilization of the air intake area of this area, effectively improving the instantaneous smoke capture efficiency, and optimizing the airflow path.

[0042] Of course, in some embodiments, to prevent oil from stagnating at the junction of the two oil-guiding flanges (i.e., the first oil-guiding flange 311 and the second oil-guiding flange 313), the portions where the left and right ends of the first oil-guiding flange 311 connect with the tops of the left and right second oil-guiding flanges 313 are each constructed as a smoothly transitioned arc-shaped structure. The arc-shaped connection between the two oil-guiding flanges eliminates dead angles, improves oil flow, and facilitates cleaning.

[0043] See also Figure 6 and Figure 7 In this embodiment, the smoke hood 20 is further provided with a deflector 40 at the main air inlet 31. The bottom edge of the deflector 40 is connected to the bottom of the smoke hood 20 and corresponds to the main air inlet 31 below the air inlet plate 30. The deflector 40 extends upward and backward as a whole, guiding the airflow at the main air inlet 31 to smoothly enter the chamber and reduce inlet turbulence noise.

[0044] See also Figure 1To facilitate installation of the deflector plate 40 (primarily to avoid interference), the main air inlet 31 on the air inlet plate 30 of this embodiment is an open opening extending through the lower edge of the air inlet plate 30. "Open opening" means that the lower portion of the main air inlet 31 communicates with the lower edge of the air inlet plate 30, forming an open channel. In other words, the main air inlet 31 extends downward to the bottom edge of the air inlet plate 30, forming a "U-shaped" gap.

[0045] This embodiment features a rearward-recessed flue gas buffer chamber on the front air inlet panel of the fume hood, providing a critical structural "temporary storage space" for sudden surges of oil smoke. When the main air inlet reaches instantaneous suction saturation, any oil smoke that hasn't been drawn in is effectively trapped and temporarily contained within the buffer chamber, preventing it from dispersing and escaping directly into the kitchen environment in front of the air inlet, thus increasing processing time for the fan system. Furthermore, the flue gas buffer chamber's upper area tapers from bottom to top, aligning with the natural flow characteristics of rising oil smoke and forming an upward-converging flow channel. This structural design effectively confines and guides both temporarily stored oil smoke and newly generated rising oil smoke within the chamber, directing it to the upper auxiliary air inlet area in a more concentrated and orderly manner, significantly improving capture efficiency. The lower main air inlet captures normal and low-altitude oil smoke. When a large amount of oil smoke suddenly rises beyond the range of the main air inlet, the upper auxiliary air inlet intervenes promptly to provide secondary capture for the rising oil smoke, completely eliminating the problem of oil smoke escaping beyond a single air intake.

Claims

1. A range hood comprising a fume hood (20) and a panel (50) arranged on the front side of the fume hood (20) so as to be rotatable forward and backward, characterized in that: The front of the smoke hood (20) is provided with an air inlet plate (30), and the front side surface of the air inlet plate (30) is provided with a smoke buffer chamber (33) which is partially recessed backwards, and the left and right dimensions of at least the upper area of the smoke buffer chamber (33) gradually decrease from bottom to top, and the area where the smoke buffer chamber (33) is located is also provided with a main air inlet (31) and an auxiliary air inlet (32), and the auxiliary air inlet (32) is located above the main air inlet (31).

2. The range hood according to claim 1, characterized in that: The lower area of the smoke buffer chamber (33) is a rectangular area with the same left and right dimensions, and the left and right dimensions of the upper area of the smoke buffer chamber (33) gradually decrease upward from the above-mentioned rectangular area. The main air inlet (31) extends in the left and right directions, and at least a part of the main air inlet (31) is located in the lower area of the smoke buffer chamber (33). The auxiliary air inlet (32) is arranged in the upper area of the smoke buffer chamber (33).

3. The range hood according to claim 2, characterized in that: The left and right ends of the main air inlet (31) extend to the left and right side edges of the lower area of the smoke buffer chamber (33) respectively.

4. The range hood according to claim 2, characterized in that: A portion of the main air inlet (31) is located in the upper region of the smoke buffer chamber (33).

5. The range hood according to claim 2, characterized in that: The top edge of the upper area of the smoke buffer chamber (33) is adjacent to the top edge of the air inlet plate (30).

6. The range hood according to any one of claims 1 to 5, characterized in that: The air inlet area of the main air inlet (31) gradually increases from the left and right ends to the middle area, and the upper edge (310) of the main air inlet (31) is constructed to be inclined upward from the left and right ends to the middle position, thereby forming an inverted V-shaped structure.

7. The range hood according to claim 6, characterized in that: The upper edge (310) of the main air inlet (31) further comprises a first oil-guiding flange (311) that folds and extends backward.

8. The range hood according to claim 7, characterized in that: There are at least two auxiliary air inlets (32) arranged in sequence along the left-right direction, and each auxiliary air inlet (32) is a strip-shaped opening extending along the left-right direction.

9. The range hood according to claim 7, characterized in that: The main air inlet (31) further includes left and right opposite side edges (312), both of the side edges (312) extend vertically and each have a second oil guide flange (313) folded and extended backward, and the left and right ends of the first oil guide flange (311) are connected to the tops of the left and right second oil guide flanges (313).

10. The range hood according to any one of claims 1 to 5, characterized in that: The air inlet plate (30) is arranged to extend vertically, and the air inlet plate (30) and the rear side wall of the smoke collecting hood (20) together define a vertically extending air inlet chamber (21), and the rear side wall of the smoke buffer chamber (33) is a vertically extending straight wall.

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