A noise reduction air inlet net and a range hood

Abstract

The utility model belongs to the range hood technical field discloses a kind of noise reduction air inlet net and range hood.Noise reduction air inlet net includes several flow guide fins, several flow guide fins are distributed along horizontal direction interval, adjacent two flow guide fins form airflow passage bending along up-down direction, the below of each flow guide fin is provided with oil guide, and the side of oil guide towards flow guide fin is provided with the oil guide groove for collecting oil liquid falling from flow guide fin.The utility model can reduce the noise when range hood works, improve the oil-gas separation effect of oil fume, and centralizedly collect oil liquid, avoid oil liquid drop to the kitchenware below.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to a noise-reducing air inlet mesh and a range hood. Background Technology

[0002] As an essential appliance in the kitchen, the range hood can effectively remove cooking fumes, providing users with a safe and healthy cooking environment.

[0003] Most existing range hoods use centrifugal fans as the primary power source for extracting cooking fumes. When the range hood is working, cooking fumes enter through the air inlet at the front. The rotating impeller of the centrifugal fan generates strong centrifugal force, which expels the fumes through ducts to the outside of the kitchen. During operation, the centrifugal fan generates significant vibration noise, as does the airflow noise generated during the fume circulation. This noise generated inside the range hood is transmitted to the outside through the air inlet, interfering with the user's hearing and affecting the user experience. Simultaneously, the cooking fumes entering the range hood pass through a fume collection hood installed outside the air inlet. Some of the oil in the fumes is captured by the filter in the fume collection hood. However, the filter's ability to capture oil is limited, and a large amount of oil is still discharged with the cooking fumes. To solve these problems, some range hoods have designed an "S"-shaped channel at the air inlet, using this channel to reduce noise and promote oil-gas separation. However, the oil separated from the fumes adheres to the inner wall of the "S"-shaped channel. Over time, the oil accumulates and drips down the "S"-shaped channel, contaminating the kitchen utensils below the range hood and affecting the user experience. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a noise-reducing air inlet mesh and a range hood, which can effectively solve the problem of oil dripping down and contaminating kitchen utensils in the prior art.

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

[0006] A noise-reducing air intake mesh for use in a range hood includes several guide fins, which are spaced apart in a horizontal direction. An airflow channel that bends in a vertical direction is formed between two adjacent guide fins. An oil guide is provided below each guide fin, and the oil guide has an oil groove on the side facing the guide fin for collecting oil falling from the guide fin.

[0007] Compared with the prior art, the noise-reducing air inlet mesh of this utility model has the following beneficial effects: multiple guide fins are arranged at intervals along the horizontal direction to form an airflow channel in the vertical direction, corresponding to the oil fumes flowing vertically along the range hood. When the oil fumes enter the airflow channel, larger eddies in the airflow are broken up by the guide fins, thereby preventing the generation of large eddies in the airflow entering the range hood and reducing the eddy noise generated by the entire range hood. By bending the airflow channel, the noise inside the range hood is blocked and reflected by the inner wall of the airflow channel when it is transmitted outward through the airflow channel, thereby reducing the noise intensity. At the same time, the guide fins promote the condensation of oil in the oil fumes, thereby causing the oil in the oil fumes to separate on the surface of the guide fins, improving the oil-gas separation effect of the range hood. An oil guide is provided below the guide fins, which allows the separated oil to drip down along the surface of the guide fins into the oil guide, so as to collect the oil and prevent the oil from dripping onto the kitchen utensils below.

[0008] In one embodiment, the oil guide includes two oil guide plates arranged at an included angle, with the two oil guide plates forming an oil guide groove, and the junction of the two oil guide plates is rounded.

[0009] In one embodiment, the bottom end of the guide fin is connected and fixed to the inner surface of the bottom of the oil guide groove.

[0010] In one embodiment, the oil guide is inclined, and the lower end of the oil guide along the height direction is the oil outlet end, which is close to the back side of the range hood.

[0011] In one embodiment, the oil guide is tilted at an angle of 5°-15° relative to the horizontal plane.

[0012] In one embodiment, a frame is further included, in which a mounting cavity is formed, and the guide fins are mounted on the cavity wall of the mounting cavity.

[0013] In one embodiment, an oil collecting groove is provided on one of the inner walls of the frame, the oil collecting groove being connected to the oil guiding groove and located below the oil outlet end.

[0014] In one embodiment, the frame is provided with mounting holes for connection with the range hood via fasteners;

[0015] Alternatively, the frame may be provided with a snap-fit ​​structure for engaging with the range hood.

[0016] In one embodiment, the guide fins are folded back and forth along the flow direction of the oil fumes in the airflow channel, the bends of the guide fins are rounded, and the shape of the guide fins is a tangent function curve.

[0017] A range hood includes a blower box, a smoke collection hood, and a noise-reducing air inlet screen. The blower box has a chamber, and a centrifugal fan is installed in the chamber. The blower box is connected to the smoke collection hood and forms a smoke inlet channel. The noise-reducing air inlet screen is installed in the smoke inlet channel and located below the centrifugal fan.

[0018] Compared with the prior art, the range hood described in this utility model has the following advantages: By setting a noise-reducing air intake mesh at the air inlet of the range hood, several guide fins can cut the airflow entering the chamber, preventing large eddies in the airflow from generating airflow noise. Simultaneously, vibration noise and airflow noise inside the chamber are reflected by the inner wall of the airflow channel when transmitted outwards, thus reducing noise intensity. Furthermore, the guide fins can promote oil-liquid separation in the fumes, reducing the amount of oil carried in the fumes and minimizing oil pollution to the external environment. The separated oil drips down the surface of the guide fins into the oil guide component for centralized collection, preventing oil from dripping onto the kitchen utensils below. Therefore, this range hood features low noise and minimal oil pollution.

[0019] In one embodiment, the smoke hood is provided with an air inlet, and an oil mesh is provided at the air inlet. The oil mesh is provided with a plurality of mesh holes extending in the horizontal direction, and the airflow channel of the noise reduction air inlet mesh extends in the same direction on the horizontal plane as the mesh holes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the noise reduction air inlet mesh according to an embodiment of the present utility model;

[0021] Figure 2 This is a cross-sectional view of the noise reduction air inlet mesh according to an embodiment of this utility model;

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a partial schematic diagram of the noise reduction air inlet mesh according to an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of a range hood according to an embodiment of the present utility model;

[0025] Figure 6 This is a cross-sectional view of the range hood in the front view according to an embodiment of the present utility model;

[0026] Figure 7 yes Figure 6 Enlarged view of point B in the middle;

[0027] Figure 8This is a sectional view of the range hood in the embodiment of this utility model from the side.

[0028] Figure 9 yes Figure 8 A magnified view of point C in the middle.

[0029] In the picture:

[0030] 1. Frame; 10. Mounting cavity; 11. Mounting hole; 2. Guide fins; 3. Airflow channel; 4. Oil guide; 40. Curved surface; 41. Oil guide groove; 5. Oil collection groove;

[0031] 100. Noise-reducing air inlet screen; 200. Air box; 210. Smoke inlet channel; 220. Smoke outlet; 230. Front side; 240. Back side; 300. Smoke hood; 310. Oil screen; 311. Mesh; 400. Centrifugal fan; 500. Check valve. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 8 As shown, this embodiment provides a noise-reducing air intake mesh 100 for installation in the smoke inlet channel 210 of a range hood. This noise-reducing air intake mesh 100 uses several spaced-apart guide fins 2 to allow cooking fumes to pass through a curved airflow channel 3 between adjacent guide fins 2, thus solving the problem of vibration noise and airflow noise inside the range hood being transmitted to the outside through the air inlet 210 and interfering with the user's hearing. By providing an oil guide 4 below the guide fins 2, the oil guide 4 collects the condensed oil dripping from the guide fins 2, solving the problem of oil dripping and contaminating the kitchen utensils below the range hood.

[0037] Specifically, the noise-reducing air intake mesh 100 provided in this embodiment includes a plurality of guide fins 2, which are spaced apart in the horizontal direction. It can be understood that the horizontal direction can be either the front-to-back direction of the range hood or the left-to-right direction. In this embodiment, the cross-section of the smoke inlet channel 210 is rectangular, and the plurality of guide fins 2 are arranged sequentially at intervals along the left-to-right direction of the range hood. A curved airflow channel 3 is formed between two adjacent guide fins 2, allowing cooking fumes generated by the user to enter the interior of the range hood through the airflow channel 3. The airflow channel 3 is curved along the vertical direction of the range hood, and the cooking fumes flow along the vertical direction of the range hood after entering the airflow channel 3. An oil guide 4 is provided below each guide fin 2, and an oil guide groove 41 is provided on the side of the oil guide fin 4 facing the guide fin 2. The oil guide groove 41 is used to collect the oil falling from the guide fin 2 and guide the oil to flow along the extending direction of the oil guide groove 41.

[0038] Understandably, cooking fumes enter the range hood through the curved airflow channel 3, enabling the range hood to extract the fumes. During this process, when the airflow in the inlet 210 area enters the airflow channel 3, larger eddies in the airflow are broken up by the guide fins 2, thus preventing the formation of large eddies in the airflow entering the range hood and reducing the overall eddy noise generated by the range hood. Because the airflow channel 3 is curved, noise from inside the range hood is reflected by the inner wall of the airflow channel 3 when it is transmitted outward, thus reducing the noise intensity. At the same time, the guide fins 2 installed in the inlet 210 area promote the condensation of oil in the fumes, causing the oil in the fumes to separate on the surface of the guide fins 2, improving the oil-gas separation effect of the range hood. An oil guide 4 is provided below the guide fins 2, allowing the separated oil to drip down the surface of the guide fins 2 into the oil guide 4 for centralized collection. Furthermore, since several guide fins 2 are distributed at intervals along the horizontal direction, while the fumes flow along the vertical direction of the range hood, this helps to arrange multiple airflow channels 3 over a large area within the cross-section of the fumes flow channel, thereby improving the efficiency of fumes circulation.

[0039] Specifically, the oil guide 4 includes two oil guide plates arranged at an included angle, which are integrally bent into shape. The two oil guide plates form a "V" shape, and an oil guide groove 41 is formed between them. The junction of the two oil guide plates is rounded, that is, an arc surface 40 is formed in the area where the two oil guide plates meet. The purpose of this structure is to avoid sharp corners at the bottom of the oil guide 4. By designing the rounded corners of the outer wall of the oil guide 4, the impact on air intake is reduced. Of course, in some embodiments, if the oil guide 4 does not affect air intake, there is no need to limit the specific shape of the oil guide 4. For example, the cross-section of the oil guide 4 can be square, circular, etc., and the oil guide groove 41 can be machined on the top of the oil guide 4.

[0040] Specifically, the bottom end of the guide fin 2 is connected and fixed to the bottom of the oil guide groove 41. In this embodiment, the oil guide groove 41 is fixed to the bottom of the guide fin 2 by welding to achieve the installation and fixation of the oil guide component 4. The separated oil can flow into the oil guide groove 41 along the surface of the guide fin 2. Of course, in some embodiments, the guide fin 2 and the oil guide component 4 can also be arranged vertically at intervals, and the oil guide component 4 can be directly installed on the inner wall of the smoke inlet channel 210 or other supporting components. The oil guide component 4 is located below the guide fin 2, and the oil on the guide fin 2 drips downward into the oil guide groove 41.

[0041] Specifically, refer to Figure 8 and Figure 9As shown, the oil guide components 4 are inclined, with all oil guide components 4 tilted relative to the horizontal plane towards the same side of the smoke inlet channel 210. This allows the oil collected in the oil guide groove 41 to flow along the oil guide groove 41 to the lower end of the oil guide component 4, facilitating concentrated oil collection. The relatively lower end of the oil guide component 4 is the oil outlet end, which is close to the back side 240 of the range hood. It should be noted that the side of the range hood furthest from the user is the back side 240. Having the oil outlet end close to the back side 240 of the range hood allows for better space utilization of the entire range hood, avoiding the concentration of numerous oil collection-related components on the side closest to the user. Furthermore, having the oil outlet end close to the back side 240 of the range hood allows excess oil to flow along the back panel of the range hood into the oil cup, preventing oil from overflowing from the front side 230 and dripping onto kitchen utensils, thus avoiding a negative user experience.

[0042] The oil guide component 4 is inclined relative to the horizontal plane. The end of the oil guide component 4 near the front side 230 of the range hood is higher than the end near the back side 240 of the range hood. The inclination angle of the oil guide component 4 relative to the horizontal plane is α, where α = 5°-15°. In practical applications, the inclination angle α of the oil guide component 4 can be adjusted according to the depth of the air inlet 210 and the flowability of the oil. When the inclination angle α is small, the oil guide component 4 is relatively gentle, which helps to reduce the space occupied by the oil guide component 4 in the height direction (vertical direction in the figure) of the frame 1; when the inclination angle α is large, the oil guide component 4 is relatively steep, which facilitates the rapid flow of oil in the oil guide groove 41. In this embodiment, the specific value range of the inclination angle α of the oil guide component 4 includes, but is not limited to, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, and 15°.

[0043] Specifically, the noise-reducing air inlet mesh 100 also includes a frame 1 and an oil collection groove 5. The shape of the frame 1 matches the shape of the smoke inlet channel 210. In this embodiment, the frame 1 is a square frame. An installation cavity 10 is formed inside the frame 1. The frame 1 is installed on the inner wall of the smoke inlet channel 210, and the oil fumes enter the range hood through the installation cavity 10. The guide fins 2 and the oil guide 4 are both installed on the cavity wall of the installation cavity 10. Several guide fins 2 are distributed at intervals along the length direction (left-right direction in the figure). The two ends of the guide fins 2 are respectively connected to the two side walls of the frame 1 in the width direction (front-back direction in the figure). To facilitate the discharge of oil in the oil guide 4, the higher end of the oil guide 4 is connected to the side wall of the frame 1, and the lower end is spaced apart from the side wall of the frame 1. Correspondingly, the oil collection groove 5 is installed on one of the side walls in the width direction of the frame 1. The oil collection groove 5 is connected to the oil guide groove 41 of the oil guide 4, and the oil collection groove 5 is located below the oil outlet end of the oil guide 4. The oil in the oil guide 4 flows from the oil outlet into the oil collection tank 5, and is then transported to the oil cup of the range hood through the oil collection tank 5 to achieve oil collection. It should be noted that the lower end of the oil guide 4 (i.e., the oil outlet) is spaced from the side wall of the frame 1, so that the oil can fall into the oil collection tank 5 through the gap between the oil outlet and the side wall of the frame 1.

[0044] Specifically, the frame 1 is provided with mounting holes 11 for connecting to the side wall of the smoke inlet duct 210 via fasteners. The fasteners are common fasteners such as screws and bolts. Installing the frame 1 on the side wall of the smoke inlet duct 210 via fasteners facilitates the disassembly and maintenance of the entire noise reduction air inlet mesh 100. Alternatively, the frame 1 is provided with a snap-fit ​​structure for engaging with the side wall of the smoke inlet duct 210. Similarly, using snap-fit ​​to achieve the installation between the noise reduction air inlet mesh 100 and the smoke inlet duct 210 facilitates the disassembly and maintenance of the entire noise reduction air inlet mesh 100. The snap-fit ​​structure includes mutually cooperating buckles and slots. In specific implementations, buckles can be provided on the frame 1, corresponding to slots on the side wall of the smoke inlet duct 210; or, slots can be provided on the frame 1, corresponding to buckles on the side wall of the smoke inlet duct 210. Of course, in some embodiments, where convenient disassembly is not a concern, the frame 1 can also be directly welded and fixed to the side wall of the smoke inlet duct 210. Alternatively, frame 1 can be removed, and the guide fins 2 and oil guide 4 can be directly welded or inserted into the side wall of the air inlet 210.

[0045] Specifically, the guide fins 2 are repeatedly bent along the flow direction of the fumes within the airflow channel 3. The shape of the guide fins 2 matches the shape of the airflow channel 3. The repeated bending of the guide fins 2 creates multiple bends, making the airflow channel 3 more tortuous, which improves noise shielding and reflection capabilities, reducing noise intensity. In this embodiment, the cross-section of the guide fins 2 is "S"-shaped, meaning the guide fins 2 are bent twice. Correspondingly, the airflow channel 3 is also "S"-shaped. It is understood that the more times the guide fins 2 are repeatedly bent, the more tortuous the airflow channel 3 becomes, resulting in stronger noise shielding and reflection capabilities, but also increasing the resistance to fumes entering the range hood. Therefore, in practical applications, the bending shape of the airflow channel 3 can be comprehensively evaluated based on factors such as the noise level of the range hood and the flow rate of fumes. Of course, in some embodiments, the guide fins 2 can be bent three or more times, i.e., the guide fins 2 are "wavy".

[0046] Specifically, the bends of the guide fins 2 are rounded. In this embodiment, the shape of the guide fins 2 is designed as a tangent function curve. This structure makes the inner wall of the airflow channel 3 relatively smooth, which helps to reduce the flow resistance of oil fumes in the airflow channel 3, avoid airflow separation and turbulence, and reduce the energy loss of the airflow. In addition, this shape also helps the oil fumes to be evenly distributed in the airflow channel 3, reducing the phenomenon of excessively high or low local flow velocities. At the same time, this shape also helps to enhance the deformation resistance of the guide fins 2 under high pressure or high speed airflow, and improve the overall structural strength of the noise reduction air inlet mesh 100.

[0047] Specifically, the guide fins 2 are made of aluminum or stainless steel to give them good heat dissipation performance and mechanical strength, and to promote the condensation and separation of oil fumes when they pass through the airflow channel 3.

[0048] like Figures 5 to 9As shown, this embodiment also provides a range hood, including a noise-reducing air inlet mesh 100, an air box 200, and a smoke collection hood 300. The air box 200 has a front side 230 and a back side 240 facing each other. The front side 230 faces the user, and the back side 240 is used for installation and fixation to the wall. The air box 200 has a chamber, in which a centrifugal fan 400 is installed. The air box 200 is connected to the smoke collection hood 300 and forms a smoke inlet channel 210. The noise-reducing air inlet mesh 100 is installed in the smoke inlet channel 210 and located below the centrifugal fan 400. A smoke outlet 220 is provided at the top of the air box 200. Driven by the centrifugal fan 400, the fumes enter the air box 200 through the smoke inlet channel 210 and are discharged through the smoke outlet 220. To prevent backflow of fumes, a check valve 500 is also provided at the smoke outlet 220. Both the smoke inlet duct 210 and the smoke outlet 220 are connected to the chamber of the air box 200. A noise-reducing air inlet mesh 100 is installed on the side wall of the smoke inlet duct 210, allowing the fumes to flow towards the centrifugal fan 400 through the airflow channel 3 within the noise-reducing air inlet mesh 100. Under the action of the noise-reducing air inlet mesh 100, noise generated inside the chamber is blocked and reflected when transmitted outward through the airflow channel 3, thereby reducing the noise intensity and improving the user experience.

[0049] Specifically, the fume hood 300 is used to collect cooking fumes to prevent them from spreading to the surrounding area. The fume hood 300 is equipped with an air inlet for fume flow. The area between the air inlet of the fume hood 300 and the chamber inside the air box 200 is the fume inlet channel 210. A noise-reducing air inlet mesh 100 is installed within the fume inlet channel 210. When the fumes pass through the noise-reducing air inlet mesh 100, the fume temperature decreases and condenses, allowing the oil to adhere to the surface of the guide fins 2, thus achieving oil-gas separation. Therefore, the separation effect of the guide fins 2 helps reduce the oil content in the fumes, preventing large amounts of oil from being emitted with the fumes and causing environmental pollution. Simultaneously, the separated oil drips down the surface of the guide fins 2 into the oil guide 4 for centralized collection, preventing oil from dripping onto the cookware below.

[0050] like Figures 5 to 7As shown, an oil mesh 310 is installed at the air inlet of the smoke collection hood 300, and the oil mesh 310 has multiple mesh holes 311 extending horizontally. The airflow channel 3 on the noise reduction air inlet hood 100 extends in the same direction on the horizontal plane as the mesh holes 311. Specifically, in this embodiment, the mesh holes 311 are elongated holes, and the length direction of the mesh holes 311 extends along the front-back direction of the range hood, and the airflow channel 3 also extends in the front-back direction of the range hood on the horizontal plane. Optionally, in other embodiments, the mesh holes 311 are elongated holes, and the length direction of the mesh holes 311 extends along the left-right direction of the range hood, and the airflow channel 3 also extends in the left-right direction of the range hood on the horizontal plane. This structure can reduce the intersection between the bottom end of the guide fins 2 and the extension direction of the mesh holes, reduce the obstruction of the oil fumes in the smoke inlet channel 210 by the guide fins 2, and make the air intake smoother.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A noise-reducing air inlet mesh (100) for use in a range hood, characterized in that, It includes several guide fins (2), which are distributed at intervals in the horizontal direction. An airflow channel (3) is formed between two adjacent guide fins (2) and bends in the vertical direction. An oil guide (4) is provided below each guide fin (2). The oil guide (4) has an oil guide groove (41) on the side facing the guide fin (2) for collecting the oil falling from the guide fin (2).

2. The noise-reducing air inlet mesh according to claim 1, characterized in that, The oil guide (4) includes two oil guide plates arranged at an angle, and the two oil guide plates form the oil guide groove (41) between them. The junction of the two oil guide plates is rounded.

3. The noise-reducing air inlet mesh (100) according to claim 2, characterized in that, The bottom end of the guide fin (2) is connected and fixed to the inner surface of the bottom of the oil guide groove (41).

4. The noise-reducing air inlet mesh (100) according to claim 1, characterized in that, The oil guide (4) is inclined, and the lower end of the oil guide along the height direction is the oil outlet end, which is close to the back side of the range hood.

5. The noise-reducing air inlet mesh (100) according to claim 4, characterized in that, The oil guide (4) is tilted at an angle of 5°-15° relative to the horizontal plane.

6. The noise-reducing air inlet mesh (100) according to claim 4, characterized in that, It also includes a frame (1), in which a mounting cavity (10) is formed, and the guide fins (2) are mounted on the cavity wall of the mounting cavity (10).

7. The noise-reducing air inlet mesh (100) according to claim 6, characterized in that, An oil collection groove (5) is provided on one of the inner walls of the frame (1). The oil collection groove (5) is connected to the oil guide groove (41) and is located below the oil outlet end.

8. The noise-reducing air inlet mesh (100) according to claim 6, characterized in that, The frame (1) is provided with mounting holes (11) for connecting to the range hood via fasteners; Alternatively, the frame (1) may be provided with a snap-fit ​​structure for snapping into the range hood.

9. The noise-reducing air inlet mesh (100) according to any one of claims 1 to 8, characterized in that, The guide fins (2) are bent back and forth along the flow direction of the oil fumes in the airflow channel (3). The bends of the guide fins (2) are rounded, and the shape of the guide fins (2) is a tangent function curve.

10. A range hood, characterized in that, The device includes a bellows (200), a smoke hood (300), and a noise-reducing air inlet net (100) as described in any one of claims 1 to 9. The bellows (200) has a chamber, and a centrifugal fan (400) is installed in the chamber. The bellows (200) is connected to the smoke hood (300) and forms a smoke inlet channel (210). The noise-reducing air inlet net (100) is installed in the smoke inlet channel (210) and located below the centrifugal fan (400).

11. A range hood according to claim 10, characterized in that, The smoke hood (300) is provided with an air inlet, and an oil mesh (310) is provided at the air inlet. The oil mesh (310) is provided with a plurality of mesh holes (311) extending in the horizontal direction. The airflow channel (3) on the noise reduction air inlet mesh (100) extends in the same direction on the horizontal plane as the mesh holes (311).

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