Range hood

Abstract

The invention relates to the technical field of range hoods, in particular to a range hood. The range hood comprises an exhaust fume collecting hood, a first air inlet and two second air inlets are formed in the lower portion of a front side plate of the exhaust fume collecting hood side by side in the length direction, and the first air inlet is located between the two second air inlets; in the height direction of the exhaust fume collecting hood, the bottom wall of the first air inlet is higher than the bottom walls of the second air inlets, so that a non-air-inlet area is formed between the two second air inlets. Three air inlets are formed in the front side plate of the exhaust fume collecting hood in the length direction, and the first air inlet is located between the two second air inlets. The oil smoke rises to the middle upper position of the exhaust fume collecting hood and is sucked through the first air inlet. The non-air-inlet area forms a negative pressure environment in the corresponding smoke collecting cavity area in the smoke collecting hood, and the smoke suction amount of the two second air inlets is increased. The three air inlets are formed in the lower part of the exhaust fume collecting hood, so that the fume suction efficiency of the range hood is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of range hoods, and in particular to a range hood. Background Art

[0002] A range hood is a device used to absorb and exhaust fumes produced during the cooking process, and has gradually become an indispensable household appliance for purifying the kitchen environment.

[0003] The front side of the range hood is usually provided with a lower air inlet. Since the middle of the lower air inlet is located on the main air inlet path of the fan assembly, the oil smoke generated by the stoves on the left and right sides below the range hood will inevitably rise to the middle and upper part of the lower air inlet. However, the existing lower air inlet has a single structure, mostly long holes, straight holes, etc., which cannot form effective and targeted smoke extraction, limiting the smoke extraction efficiency of the range hood. Summary of the invention

[0004] One of the technical problems solved by the present invention is to provide a range hood which can effectively solve the technical problem in the prior art that the range hood has a single air inlet structure resulting in low smoke extraction efficiency.

[0005] The above technical problems are solved by the following technical solutions:

[0006] A range hood, comprising a smoke collecting hood, wherein a first air inlet and two second air inlets are arranged side by side along the length direction at the lower portion of the front side plate of the smoke collecting hood, and the first air inlet is located between the two second air inlets; along the height direction of the smoke collecting hood, a bottom wall of the first air inlet is higher than a bottom wall of the second air inlet to form a non-air inlet area between the two second air inlets.

[0007] Compared with the background technology, the range hood of the present invention has the following beneficial effects:

[0008] Three air inlets are arranged along the length direction of the front side plate of the smoke hood, and the first air inlet is located between the two second air inlets. Along the height direction of the smoke hood, the bottom wall of the first air inlet is higher than the bottom wall of the second air inlet, and the oil smoke generated by the stove mouth below the smoke hood rises to the middle and upper position of the smoke hood and is inhaled through the first air inlet. The non-air inlet area below the first air inlet is the solid non-perforated part of the front side plate, so that the non-air inlet area forms a negative pressure environment in the corresponding smoke collecting cavity area in the smoke hood, increases the amount of smoke from the two second air inlets on both sides of the non-air inlet area, and distributes the oil smoke generated by the stove mouths on the left and right sides to the corresponding second air inlets respectively. By arranging the above three air inlets at the lower part of the smoke hood, the smoke extraction efficiency of the range hood is improved.

[0009] In one of the embodiments, along the height direction of the smoke collecting hood, the length of the first air inlet gradually decreases from top to bottom, and the first side wall of the second air inlet away from the first air inlet is inclined from top to bottom toward the first air inlet.

[0010] In one embodiment, the second side wall of the second air inlet close to the first air inlet includes a first section and a second section connected at an angle;

[0011] The first section is inclined from top to bottom along the height direction of the smoke hood toward the first air inlet and extends to the height where the bottom wall of the first air inlet is located; the second section is inclined from bottom to top along the height direction of the smoke hood toward the non-air inlet area and extends to the height where the top of the non-air inlet area is located.

[0012] In one embodiment, the area of ​​the first air inlet is S1, the sum of the areas of the first air inlet and the two second air inlets is S, then 0.1≤S1 / S≤0.2;

[0013] And / or, along the height direction of the smoke collecting hood, the height of the second air inlet is H, the height of the non-air inlet area is h, and then 1 / 3≤h / H≤2 / 3.

[0014] In one embodiment, the fume hood comprises:

[0015] An air inlet plate, the air inlet plate being provided with the first air inlet and two of the second air inlets, the air inlet plate being arranged in an inclined manner from top to bottom toward the inside of the smoke collecting hood along the height direction of the smoke collecting hood;

[0016] An oil guide plate is inclined from bottom to top along the height direction of the smoke collecting hood toward the inside of the smoke collecting hood and is arranged at an angle with the air inlet plate, and the top end of the oil guide plate is connected to the bottom end of the air inlet plate.

[0017] In one embodiment, a flow straightening member is provided in the smoke collecting hood, and two ends of the flow straightening member along the width direction of the smoke collecting hood are respectively provided on the inner side wall of the non-air inlet area and the inner side wall of the back plate of the smoke collecting hood;

[0018] The rectifying component includes a first rectifying plate and two second rectifying plates respectively located on both sides of the first rectifying plate along the length direction of the smoke hood. All three are inclined from bottom to top toward the back plate along the height direction of the smoke hood, and the first rectifying plate is arranged opposite to the first air inlet; the two second rectifying plates are inclined from one side connected to the first rectifying plate toward the other side opposite thereto and from top to bottom toward the side away from the first rectifying plate.

[0019] In one of the embodiments, along the direction from the front side plate to the back plate, the width of the first rectifying plate gradually decreases, and the width of the second rectifying plate gradually increases.

[0020] In one embodiment, damping holes are provided on the first rectifying plate and the two second rectifying plates.

[0021] In one of the embodiments, the inner side walls of the first rectifying plate and the two second rectifying plates are both provided with a sound absorbing layer, and the sound absorbing layer covers the damping holes.

[0022] In one of the embodiments, two guide plates are arranged at intervals along the length direction inside the smoke hood, and the guide plates are inclined from bottom to top toward the rectifying member along the height direction of the smoke hood, and the guide plates are arranged one by one with the second rectifying plates so that a drainage channel is formed between the guide plates and the corresponding second rectifying plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a first structural schematic diagram of a range hood with a smoke collecting plate opened provided by an embodiment of the present invention;

[0024] Figure 2 is a partial structural schematic diagram of a front side plate provided by an embodiment of the present invention;

[0025] Figure 3 is a cross-sectional view of a smoke collecting hood provided by an embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of a rectifier provided in an embodiment of the present invention;

[0027] Figure 5 It is a second structural schematic diagram of the range hood with the smoke collecting plate opened provided by an embodiment of the present invention.

[0028] The names and numbers of the components in the figure are as follows:

[0029] 100, smoke hood; 10, front side panel; 20, back panel; 30, smoke collecting plate; 200, bellows;

[0030] 1. Air inlet plate; 11. First air inlet; 12. Second air inlet; 121. First side wall; 122. Second side wall; 1221. First section; 1222. Second section; 13. Non-air inlet area; 14. Inclined area; 2. Oil guide plate; 3. Rectifier; 31. First rectifying plate; 32. Second rectifying plate; 33. Damping hole; 4. Deflector. DETAILED DESCRIPTION

[0031] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0036] like Figure 1As shown, this embodiment proposes a range hood, which includes a smoke hood 100 and a bellows 200. The smoke hood 100 includes a front side plate 10, a back plate 20, and a smoke collecting plate 30. The bottom of the front side plate 10 is provided with a lower air inlet. The smoke collecting plate 30 is movably mounted on the front side plate 10, and the lower air inlet is opened or closed manually or automatically. When the range hood is not working, the smoke collecting plate 30 covers the lower air inlet. When the range hood is working, the smoke collecting plate 30 is flipped relative to the front side plate 10 and opens the lower air inlet to suck the oil smoke generated by the stove mouth under the smoke hood 100 into the smoke collecting chamber of the smoke hood 100. The bellows 200 is installed on the top of the smoke hood 100, and a fan assembly is installed in the bellows 200 to discharge the oil smoke in the smoke collecting chamber to the outside. The stove mouth under the smoke hood 100 is usually arranged with two or more intervals along the length direction of the smoke hood 100 (left and right direction in the figure).

[0037] Since the middle of the lower air inlet is located on the main air inlet path of the fan assembly, the oil smoke generated by the stoves on the left and right sides below the range hood will inevitably rise to the middle and upper part of the lower air inlet. However, the existing lower air inlet has a single structure, mostly long holes, straight holes, etc., which cannot form effective and targeted smoke extraction, limiting the smoke extraction efficiency of the range hood.

[0038] To solve the above problems, Figure 1 and Figure 2 As shown, in the range hood of this embodiment, the lower part of the front side plate 10 of the smoke hood 100 is provided with a first air inlet 11 and two second air inlets 12 side by side along the length direction, and the first air inlet 11 is located between the two second air inlets 12. Along the height direction of the smoke hood 100 (the up and down direction in the figure), the bottom wall of the first air inlet 11 is higher than the bottom wall of the second air inlet 12, so as to form a non-air inlet area 13 between the two second air inlets 12. Three air inlets are provided along the length direction of the front side plate 10 of the smoke hood 100, and the first air inlet 11 is located between the two second air inlets 12. Along the height direction of the smoke hood 100, the bottom wall of the first air inlet 11 is higher than the bottom wall of the second air inlet 12, and the oil smoke generated by the stove mouth below the smoke hood 100 rises to the upper middle part of the smoke hood 100 and is smoked through the first air inlet 11. The non-air inlet area 13 below the first air inlet 11 is a solid non-perforated portion of the front side plate 10, so that the non-air inlet area 13 forms a negative pressure environment in the corresponding smoke collecting cavity area in the smoke collecting hood 100, increasing the smoke intake of the two second air inlets 12 on both sides of the non-air inlet area 13, so that the oil smoke generated by the stoves on the left and right sides is respectively distributed to the corresponding second air inlets 12. By arranging the above three air inlets at the lower part of the smoke collecting hood 100, the smoke extraction efficiency of the range hood is improved.

[0039] It should be noted that the bellows 200 is installed at the middle position of the top of the smoke hood 100 along the length direction of the smoke hood 100, so the middle part of the front side plate 10 is located on the main air inlet flow path of the fan assembly in the bellows 200, so that the oil smoke generated by the stove mouth inevitably rises to the middle and upper position of the three air inlets, so that the first air inlet 11 can smoke in a targeted manner, thereby improving the smoking efficiency. The inside of the smoke collection cavity corresponding to the non-air inlet area 13 forms a negative pressure environment, which increases the suction force of the second air inlets 12 on the left and right sides, thereby increasing the amount of smoke from the second air inlet 12.

[0040] like Figure 2 As shown, along the height direction of the smoke hood 100, the length of the first air inlet 11 gradually decreases from top to bottom, and the first side wall 121 of the second air inlet 12 away from the first air inlet 11 is inclined from top to bottom toward the first air inlet 11. Specifically, the first air inlet 11 is an inverted trapezoidal structure. The first side walls 121 of the two second air inlets 12 are inclined from top to bottom toward the first air inlet 11, so that the overall air inlet formed by the three air inlets is a trapezoidal structure with a small lower end and a large upper end, so as to better absorb the oil smoke rising to the middle and upper position of the three air inlets, thereby increasing the amount of smoke from the three air inlets, thereby improving the smoke extraction efficiency of the range hood.

[0041] In one embodiment, the second side wall 122 of the second air inlet 12 near the first air inlet 11 includes a first section 1221 and a second section 1222 connected at an angle. The first section 1221 is inclined from top to bottom toward the first air inlet 11 along the height direction of the smoke hood 100 and extends to the height where the bottom wall of the first air inlet 11 is located. The second section 1222 is inclined from bottom to top toward the non-air inlet area 13 along the height direction of the smoke hood 100 and extends to the height where the top of the non-air inlet area 13 is located. By providing the second section 1222, it is avoided that the first sections 1221 of the two second side walls 122 intersect or cross when extending from top to bottom, and at the same time, the area of ​​the non-air inlet area 13 is increased, so that the negative pressure area of ​​the non-air inlet area 13 is diffused toward the second air inlet 12 on the left and right sides, so as to increase the smoking amount and smoking efficiency of the second air inlet 12.

[0042] In one embodiment, the area of ​​the first air inlet 11 is S1, and the sum of the areas of the first air inlet 11 and the two second air inlets 12 is S, then 0.1≤S1 / S≤0.2. Specifically, the area of ​​the first air inlet 11 accounts for 10%, 12%, 14%, 16%, 18% or 20% of the air inlet area of ​​the lower part of the front side plate 10, so as to ensure the smoking capacity of the first air inlet 11. If the area of ​​the first air inlet 11 is too small, the smoking capacity of the first air inlet 11 is reduced, and the smoking efficiency is reduced; if the area of ​​the first air inlet 11 is too large, the area of ​​the non-air inlet area 13 and the two second air inlets 12 will be reduced, and the smoking capacity of the two second air inlets 12 will be reduced, and the smoking efficiency will be reduced.

[0043] It should be noted that the top walls of the first air inlet 11 and the second air inlet 12 are arranged at the same height, and along the height direction of the smoke hood 100, the sum of the height of the first air inlet 11 and the height h of the non-air inlet area 13 is the height of the second air inlet 12. Along the height direction of the smoke hood 100, the height of the second air inlet 12 is H, and the height of the non-air inlet area 13 is h, then 1 / 3≤h / H≤2 / 3, so that the first air inlet 11 and the non-air inlet area 13 have appropriate heights, avoiding the first air inlet 11 and the non-air inlet area 13 from being too large or too small to affect the smoking efficiency of the three air inlets.

[0044] like Figure 2 and Figure 3 As shown, the smoke hood 100 includes an air inlet plate 1 and an oil guide plate 2. The air inlet plate 1 is provided with a first air inlet 11 and two second air inlets 12. The air inlet plate 1 is tilted from top to bottom toward the inside of the smoke hood 100 along the height direction of the smoke hood 100. The oil guide plate 2 is tilted from bottom to top toward the inside of the smoke hood 100 along the height direction of the smoke hood 100 and is arranged at an angle with the air inlet plate 1, and the top of the oil guide plate 2 is connected to the bottom of the air inlet plate 1. Since the air inlet plate 1 and the oil guide plate 2 are both tilted toward the inside of the smoke hood 100, the air inlet plate 1 and the oil guide plate 2 are recessed in the smoke hood 100. One end of the smoke collecting plate 30 is hinged to the front side plate 10. When the smoke collecting plate 30 closes the air inlet, the smoke collecting plate 30 covers the front of the air inlet plate 1 and the oil guide plate 2, and the outer surface of the smoke collecting plate 30 and the front side plate 10 are coplanar to ensure the aesthetic appearance of the range hood.

[0045] Specifically, since the first side wall 121 of the second air inlet 12 away from the first air inlet 11 is tilted downward from top to bottom toward the first air inlet 11, the left and right sides of the air inlet plate 1 have inclined areas 14, i.e., solid non-perforated areas, so as to make full use of the oil smoke wall attachment effect and increase the smoking rate of the second air inlet 12. The air inlet plate 1 is connected to the oil guide plate 2 at an angle, and the oil guide plate 2 is tilted downward so that the oil on the air inlet plate 1 can be drained through the oil guide plate 2 to the oil collecting box below the smoke collecting hood 100.

[0046] In one embodiment, the angle between the air inlet plate 1 and the oil guide plate 2 is α, then 120°≤α≤175°. The angle α can be 120°, 125°, 130°, 135°, 140°, 145°, 150°, 155°, 160°, 170° or 175°, etc. When the front side plate 10 of the smoke hood 100 is installed with a smoke collecting plate 30, the angle α can be selected to be a relatively large value, so that the three air inlets are closer to the front, which is beneficial to improving the smoking efficiency. When the front side plate 10 of the smoke hood 100 is not installed with a smoke collecting plate 30, the angle α can be selected to be a relatively small value, that is, the depression depth of the air inlet plate 1 and the oil guide plate 2 in the smoke hood 100 is increased, which is beneficial to smoke gathering, thereby improving the smoking efficiency.

[0047] like Figure 3 and Figure 4 As shown, a rectifying member 3 is provided in the smoke hood 100, and the two ends of the rectifying member 3 along the width direction of the smoke hood 100 are respectively provided on the inner side wall of the non-air inlet area 13 and the inner side wall of the back plate 20 of the smoke hood 100. The rectifying member 3 includes a first rectifying plate 31 and two second rectifying plates 32 respectively located on both sides of the first rectifying plate 31 along the length direction of the smoke hood, and all three are inclined from bottom to top toward the back plate 20 along the height direction of the smoke hood 100, and the first rectifying plate 31 is arranged opposite to the first air inlet 11. The two second rectifying plates 32 are inclined from one side connected to the first rectifying plate 31 to the other side opposite to the first rectifying plate 31, and from top to bottom to the side away from the first rectifying plate 31. The rectifying member 3 is provided to guide the oil smoke at the lower air inlet of the smoke collecting hood 100 to the middle and upper part of the smoke collecting hood 100 (the middle and upper position of the smoke collecting hood 100 ), and then enter the wind box 200 through the air outlet at the top of the smoke collecting hood 100 .

[0048] like Figure 3 As shown, the front end of the rectifying member 3 is installed on the inner side wall of the non-air inlet area 13 by welding or the like, and the rear end of the rectifying member 3 is installed on the back plate 20 by welding or the like. Along the height direction of the smoke collecting hood 100, the top end of the rectifying member 3 and the tail end of the top air inlet of the smoke collecting hood 100 are approximately at the same height, so that the oil smoke in the smoke collecting hood 100 is guided from the bottom air inlet to the top air inlet of the smoke collecting hood 100 through the rectifying member 3, thereby improving the smoking efficiency. At the same time, under the rectifying effect of the rectifying member 3, the wind speed of the second air inlet 12 can be increased by about 0.3m / s to 0.5m / s, which can improve the smoking effect of the top air inlet of the smoke collecting hood 100 while not weakening the smoking effect of the bottom air inlet.

[0049] like Figure 4 and Figure 5As shown, the first rectifying plate 31 is directly opposite to the first air inlet 11, and the front end of the first rectifying plate 31 is in contact with the bottom wall of the first air inlet 11, so that the oil smoke at the first air inlet 11 is guided to the middle and upper part of the smoke collecting hood 100 through the upper surface of the first rectifying plate 31. The two second rectifying plates 32 are symmetrically arranged on the left and right sides of the first rectifying plate 31, the second rectifying plate 32 on the left side is inclined to the right side, and the front end of the second rectifying plate 32 on the left side is close to the second section 1222 of the second air inlet 12 on the left side, and the second rectifying plate 32 on the right side is inclined to the left side, and the front end of the second rectifying plate 32 on the right side is close to the second section 1222 of the second air inlet 12 on the right side, so that the oil smoke at the second air inlets 12 on the left and right sides are guided to the middle and upper part of the smoke collecting hood 100 along the upper surfaces of the corresponding second rectifying plates 32.

[0050] like Figure 4 As shown, in the direction from the front side plate 10 to the back plate 20, the width of the first rectifying plate 31 gradually decreases, and the width of the second rectifying plate 32 gradually increases. Through the above arrangement, the first rectifying plate 31 is large at the front end and small at the rear end, and the second rectifying plate 32 is small at the front end and large at the rear end, so that the front end face of the rectifying member 3 is a quadrilateral, and the rear end face is roughly triangular. Since the flow rate of oil smoke in the area near the rear of the smoke collecting chamber is larger and relatively concentrated than the flow rate near the front area, the second rectifying member 3 is set to a structure with a small front end and a large rear end, which is more convenient for rectifying the oil smoke in the rear area of ​​the smoke collecting chamber, improves the rectifying effect, reduces the probability of oil smoke turbulence in the smoke collecting hood 100, and is conducive to reducing the turbulent noise of the range hood.

[0051] like Figure 4 As shown, the first rectifier plate 31 and the two second rectifier plates 32 are each provided with a damping hole 33. The first rectifier plate 31 and the two second rectifier plates 32 are each provided with a plurality of damping holes 33 in an array, so as to form a porous sound-absorbing structure on the three rectifier plates to reduce the noise of the range hood. Specifically, the diameter of the damping hole 33 is 1 mm to 5 mm, and the perforation rate of the damping hole 33 is between 6% and 24%, so as to maintain a high perforation rate, improve the acoustic impedance of the rectifier plate, and thus improve the high-frequency sound absorption effect of the rectifier plate.

[0052] In one embodiment, the inner side walls of the first rectifier plate 31 and the two second rectifier plates 32 are both fitted with a sound absorbing layer, and the sound absorbing layer is covered on the damping hole 33. By attaching the sound absorbing layer to the rectifier plate, the sound absorption and noise reduction performance of the rectifier plate is further improved. The above-mentioned sound absorbing layer is made of sound absorbing material and fixed to the inner side wall of the rectifier plate by bonding or the like. The suction material can be acoustic foam or sponge, etc., which is not specifically limited here.

[0053] like Figure 5As shown, two guide plates 4 are arranged at intervals along the length direction in the smoke hood 100, and the guide plates 4 are arranged obliquely from bottom to top toward the rectifying member 3 along the height direction of the smoke hood 100, and the guide plates 4 are arranged one by one with the second rectifying plates 32, so that a drainage channel is formed between the guide plates 4 and the corresponding second rectifying plates 32. Specifically, the two guide plates 4 arranged at intervals in this embodiment are symmetrically arranged on the left and right sides of the rectifying member 3, and each guide plate 4 is parallel or approximately parallel to the corresponding second rectifying plate 32. Through the drainage channel surrounded by the guide plates 4 and the second rectifying plates 32, the oil smoke sucked in by the two second air inlets 12 is guided from the bottom of the smoking port to the middle and upper part of the smoke hood 100 in the drainage channel, avoiding the irregular flow of oil smoke in the smoke collecting chamber to generate collision noise and turbulence on the inner side of the non-air inlet area 13, realizing the directional flow of oil smoke in the smoke collecting chamber, reducing the probability of collision noise generated by irregular flow of oil smoke, and improving the noise of the range hood.

[0054] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A range hood, characterized in that: The range hood comprises a smoke hood (100), wherein a first air inlet (11) and two second air inlets (12) are arranged side by side along a length direction at a lower portion of a front side plate (10) of the smoke hood (100), wherein the first air inlet (11) is located between the two second air inlets (12); and along a height direction of the smoke hood (100), a bottom wall of the first air inlet (11) is higher than a bottom wall of the second air inlet (12), so as to form a non-air inlet area (13) between the two second air inlets (12).

2. The range hood according to claim 1, characterized in that: Along the height direction of the smoke hood (100), the length of the first air inlet (11) gradually decreases from top to bottom, and the first side wall (121) of the second air inlet (12) away from the first air inlet (11) is inclined from top to bottom toward the first air inlet (11).

3. The range hood according to claim 2, characterized in that: The second side wall (122) of the second air inlet (12) close to the first air inlet (11) comprises a first section (1221) and a second section (1222) connected at an angle; The first section (1221) is arranged obliquely from top to bottom along the height direction of the smoke hood (100) toward the first air inlet (11) and extends to the height where the bottom wall of the first air inlet (11) is located; the second section (1222) is arranged obliquely from bottom to top along the height direction of the smoke hood (100) toward the non-air inlet area (13) and extends to the height where the top of the non-air inlet area (13) is located.

4. The range hood according to claim 1, characterized in that: The area of ​​the first air inlet (11) is S1, the sum of the areas of the first air inlet (11) and the two second air inlets (12) is S, then 0.1≤S1 / S≤0.2; And / or, along the height direction of the smoke collecting hood (100), the height of the second air inlet (12) is H, the height of the non-air inlet area (13) is h, and then 1 / 3≤h / H≤2 / 3.

5. The range hood according to claim 1, characterized in that: The smoke collecting hood (100) comprises: An air inlet plate (1), the air inlet plate (1) being provided with the first air inlet (11) and two of the second air inlets (12), the air inlet plate (1) being arranged in an inclined manner from top to bottom toward the interior of the smoke collecting hood (100) along the height direction of the smoke collecting hood (100); An oil guide plate (2), wherein the oil guide plate (2) is inclined from bottom to top toward the inside of the smoke collecting hood (100) along the height direction of the smoke collecting hood (100) and is arranged at an angle with the air inlet plate (1), and the top end of the oil guide plate (2) is connected to the bottom end of the air inlet plate (1).

6. The range hood according to any one of claims 1 to 5, characterized in that: A flow straightening member (3) is arranged in the smoke collecting hood, and two ends of the flow straightening member (3) along the width direction of the smoke collecting hood (100) are respectively arranged on the inner side wall of the non-air inlet area (13) and the inner side wall of the back plate (20) of the smoke collecting hood (100); The rectifying member (3) comprises a first rectifying plate (31) and two second rectifying plates (32) respectively located on both sides of the first rectifying plate (31) along the length direction of the smoke collecting hood, and all three are arranged to be inclined from bottom to top toward the back plate (20) along the height direction of the smoke collecting hood (100), and the first rectifying plate (31) is arranged to be opposite to the first air inlet (11); and the two second rectifying plates (32) are arranged to be inclined from one side connected to the first rectifying plate (31) toward the other side opposite thereto and from top to bottom toward the side away from the first rectifying plate (31).

7. The range hood according to claim 6, characterized in that: In the direction from the front side plate (10) to the back plate (20), the width of the first rectifying plate (31) gradually decreases, and the width of the second rectifying plate (32) gradually increases.

8. The range hood according to claim 6, characterized in that: The first rectifying plate (31) and the two second rectifying plates (32) are both provided with damping holes (33).

9. The range hood according to claim 8, characterized in that: The inner side walls of the first rectifying plate (31) and the two second rectifying plates (32) are both provided with a sound absorbing layer, and the sound absorbing layer covers the damping holes (33).

10. The range hood according to claim 6, characterized in that: Two guide plates (34) are arranged in the smoke hood (100) at intervals along the length direction. The guide plates (34) are arranged obliquely from bottom to top toward the rectifying member (3) along the height direction of the smoke hood (100), and the guide plates (34) are arranged in a one-to-one correspondence with the second rectifying plates (32) so that a drainage channel is formed between the guide plates (34) and the corresponding second rectifying plates (32).

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