Noise reduction device and range hood

Abstract

This utility model discloses a noise reduction device and a range hood. The noise reduction device includes: a housing with a noise reduction cavity inside, the upper and lower sides of which are open to form a smoke inlet and a smoke outlet, respectively; and a noise reduction component disposed in the noise reduction cavity. A horizontal plane is defined as a plane perpendicular to the vertical direction, and the orthographic projection of the noise reduction component on the horizontal plane at least covers the orthographic projections of the smoke inlet and / or the smoke outlet on the horizontal plane. Therefore, by placing a noise reduction device between the smoke collection device and the fan device, and ensuring that the orthographic projection of the noise reduction component on the horizontal plane at least covers the orthographic projections of the smoke inlet and / or the smoke outlet on the horizontal plane, not only can the operating noise of the fan be reduced, but waste oil in the fumes can also be absorbed and recovered, thus benefiting environmental protection and health.

Description

Technical Field

[0001] This utility model relates to the field of smoke machine technology, and in particular to a noise reduction device for a smoke machine and a smoke machine. Background Technology

[0002] A range hood, also known as a cooking hood or range extractor, is a kitchen appliance that purifies the kitchen environment. Installed above the stove, it quickly removes waste from combustion and harmful fumes produced during cooking, expelling them outdoors. It also condenses and collects these fumes, reducing pollution, purifying the air, and providing safety features such as protection against toxic substances and explosions.

[0003] In existing technologies, when a range hood is working, as the air in the kitchen is exhausted, a lot of noise is generated in the exhaust pipe, resulting in a poor user experience. This has a significant impact on the user's quality of life and the kitchen environment. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a noise reduction device for a range hood, which can reduce the noise of the range hood during operation.

[0005] This utility model further proposes a smoke hood.

[0006] The noise reduction device for a range hood according to an embodiment of the present invention includes: a housing, wherein a noise reduction cavity is provided inside the housing, and the upper and lower sides of the noise reduction cavity are open to form a smoke inlet and a smoke outlet, respectively; and a noise reduction component, wherein the noise reduction component is disposed in the noise reduction cavity, and a plane perpendicular to the vertical direction is defined as a horizontal plane, wherein the orthographic projection of the noise reduction component on the horizontal plane at least covers the orthographic projection of the smoke inlet and / or the smoke outlet on the horizontal plane.

[0007] Therefore, by setting up a noise reduction device between the smoke collection device and the fan device, and ensuring that the orthographic projection of the noise reduction component on the horizontal plane at least covers the orthographic projection of the smoke inlet and / or smoke outlet on the horizontal plane, not only can the operating noise of the fan be reduced, but also the waste oil in the fumes can be adsorbed and recycled, which is beneficial to the protection of the environment and health.

[0008] According to some embodiments of the present invention, the noise reduction component includes a first noise reduction element and a second noise reduction element. Both the first noise reduction element and the second noise reduction element are at least partially inclined relative to the horizontal plane. The lower ends of the first noise reduction element and the second noise reduction element are connected. In the upward direction, the distance between the first noise reduction element and the second noise reduction element gradually increases.

[0009] According to some embodiments of the present invention, both the first noise reduction component and the second noise reduction component include an outer frame and a noise reduction body. The outer frame is circumferentially arranged around the edge of the noise reduction body, and the outer frame avoids the two sides of the noise reduction body that are respectively corresponding to the smoke inlet and the smoke outlet. The outer frame is connected to the inner wall of the outer shell.

[0010] According to some embodiments of the present invention, the noise reduction body includes a noise reduction mesh, which is wavy.

[0011] According to some embodiments of the present invention, the noise reduction device further includes an oil guide groove, which is disposed between the lower end of the first noise reduction component and the lower end of the second noise reduction component and extends in the front-back direction. Both the lower end of the first noise reduction component and the lower end of the second noise reduction component are provided with oil outlets, which are connected to the oil guide groove.

[0012] According to some embodiments of the present invention, the oil guide groove is gradually inclined downward in the direction from front to back.

[0013] According to some embodiments of the present invention, there are multiple noise reduction components, and two adjacent noise reduction components are designated as a first noise reduction component and a second noise reduction component, respectively. The upper end of the first noise reduction element of the first noise reduction component and the upper end of the second noise reduction element of the second noise reduction component are connected. In the direction from top to bottom, the distance between the first noise reduction component and the second noise reduction component gradually increases.

[0014] According to some embodiments of the present invention, the noise reduction component is in the shape of a straight plate and is inclined relative to the horizontal plane.

[0015] A smoke hood according to an embodiment of the present invention includes: a smoke collection device; a fan device, wherein the fan device is disposed above the smoke collection device and connected to the smoke collection device; and a noise reduction device for the smoke hood, wherein the noise reduction device is disposed between the smoke collection device and the fan device, the smoke inlet is connected to the smoke collection device, and the smoke outlet is connected to the fan device.

[0016] According to some embodiments of the present invention, the smoke collection device has an air inlet, and the noise reduction device includes an oil guide groove, which is disposed at the lower end of the noise reduction component and extends in the front-back direction, with the oil outlet end of the oil guide groove avoiding the air inlet.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a range hood according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of a noise reduction device according to an embodiment of the present utility model; Figure 3 This is a partial schematic diagram of a noise reduction device according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of a range hood according to an embodiment of the present utility model from another perspective; Figure 5 for Figure 4 Cross-sectional view along the AA direction; Figure 6 for Figure 5 A schematic diagram of region B in the middle.

[0019] Figure label: 100. Range hood; 10. Noise reduction device; 20. Smoke collection device; 201. Air inlet; 30. Fan unit; 1. Outer shell; 11. Noise reduction cavity; 12. Smoke inlet; 13. Smoke outlet; 2. Noise reduction component; 21. First noise reduction component; 22. Second noise reduction component; 23. Outer frame; 24. Noise reduction main body; 3. Oil guide groove. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0021] The following is for reference. Figures 1-6 The present invention describes a noise reduction device 10 for a range hood 100 according to an embodiment of the present invention. The noise reduction device 10 for a range hood 100 in the present invention can be applied to a range hood 100.

[0022] Combination Figures 1-2 As shown, the noise reduction device 10 of the range hood 100 according to this utility model embodiment can mainly include: a housing 1 and a noise reduction component 2. Specifically, the surface of the noise reduction device 10 is provided with a housing 1. The housing 1 can ensure the sealing of the noise reduction device 10, prevent the collected fumes from spreading indoors, and ensure the normal operation of the range hood 100's smoke extraction function.

[0023] In embodiments of this utility model, the smoke collection device 20 includes, but is not limited to, top-suction smoke collection device, side-suction smoke collection device, deep-cavity smoke collection device, double-cavity smoke collection device, and island-type smoke collection device.

[0024] Furthermore, a noise reduction cavity 11 is provided inside the outer casing 1, which can accommodate the air entering the noise reduction device 10 to increase the time that the air collected by the smoke machine 100 exists in the noise reduction device 10, thus helping the noise reduction device 10 to eliminate more noise.

[0025] Furthermore, the upper and lower sides of the noise reduction cavity 11 are both open to form the smoke inlet 12 and the smoke outlet 13 of the noise reduction device 10, respectively. The smoke inlet 12 and the smoke outlet 13 are connected to each other, so that air can flow between the smoke inlet 12 and the smoke outlet 13 to ensure the normal flow of oil fumes in the noise reduction device 10 and finally discharge them from the range hood 100.

[0026] Furthermore, the noise reduction component 2 is disposed in the noise reduction cavity 11. Specifically, the noise reduction cavity 11 is used to house the noise reduction component 2 and the noise-reducing air. This provides a stable and reliable space for the noise reduction component 2 and allows the noise reduction component 2 to fully contact the sound waves generated by the friction of the air in the noise reduction cavity 11 to absorb noise.

[0027] In some embodiments of this utility model, a plane perpendicular to the vertical direction is defined as a horizontal plane. The orthographic projection of the noise reduction component 2 on the horizontal plane at least covers the orthographic projection of the smoke inlet 12 on the horizontal plane. This allows the sound waves entering the noise reduction device 10 from the smoke inlet 12 to be transmitted to the noise reduction component 2 as much as possible. This arrangement can improve the reliability of the noise reduction device 10 and minimize the impact of the smoke machine 100 noise on the surrounding environment and human health.

[0028] In some other embodiments of this utility model, a plane perpendicular to the vertical direction is defined as a horizontal plane. The orthographic projection of the noise reduction component 2 on the horizontal plane at least covers the orthographic projection of the smoke outlet 13 on the horizontal plane. This allows the sound waves in the noise reduction cavity 11 to pass through the noise reduction component 2 as much as possible before being transmitted to the fan device 30. This arrangement can improve the reliability of the noise reduction device 10 and minimize the noise generated by the smoke machine 100, thereby reducing the impact of noise on the surrounding environment and human health.

[0029] In some embodiments of this utility model, a plane perpendicular to the vertical direction is defined as a horizontal plane. The orthographic projection of the noise reduction component 2 on the horizontal plane at least covers the orthographic projections of the smoke inlet 12 and the smoke outlet 13 on the horizontal plane. This not only allows the sound waves entering the noise reduction device 10 from the smoke inlet 12 to be transmitted to the noise reduction component 2 as much as possible, but also allows the sound waves in the noise reduction cavity 11 to pass through the noise reduction component 2 as much as possible before being transmitted to the fan device 30. With this arrangement, the air entering the noise reduction device 10 can be sufficiently noise-reduced, the noise reduction effect of the noise reduction component 2 can be maximized, and the impact of the noise of the smoke machine 100 on the surrounding environment and human health can be reduced as much as possible.

[0030] Combination Figure 2 As shown, the noise reduction component 2 includes a first noise reduction element 21 and a second noise reduction element 22. Both the first noise reduction element 21 and the second noise reduction element 22 are at least partially inclined relative to the horizontal plane. The lower end of the first noise reduction element 21 and the lower end of the second noise reduction element 22 are connected. In the upward direction, the distance between the first noise reduction element 21 and the second noise reduction element 22 gradually increases.

[0031] Specifically, the fumes enter the noise reduction cavity 11 through the inlet 12 and are transmitted upwards. The fumes first come into contact with the lower ends of the first noise reduction element 21 and the second noise reduction element 22, connecting their lower ends and gradually increasing the distance between them from bottom to top. This makes the first noise reduction element 21 and the second noise reduction element 22 form a V-shape. The V-shape design helps reduce the turbulence generated when the fumes pass through the first noise reduction element 21 and the second noise reduction element 22, thereby reducing the noise caused by turbulence. For example, using a V-shape structure in the design of aircraft wings or other high-speed moving objects can effectively reduce wind noise. In addition, the V-shape design of the first noise reduction element 21 and the second noise reduction element 22 also allows the noise generated by the fumes after entering the noise reduction cavity 11 to be reflected in different directions when it encounters the surfaces of the first noise reduction element 21 and the second noise reduction element 22, which can further improve the noise reduction efficiency of the noise reduction device 10 to a certain extent.

[0032] Furthermore, the noise reduction component 2 of this utility model is configured in such a way that, without increasing the volume of the noise reduction device 10, the contact area between the first noise reduction component 21 and the second noise reduction component 22 and the oil fume can be increased as much as possible, so that the oil fume travels along a longer and more complex path, thereby improving the noise reduction efficiency of the first noise reduction component 21 and the second noise reduction component 22 for oil fume, as well as the adsorption efficiency of waste oil in the oil fume.

[0033] Combination Figure 2 and Figure 3As shown, both the first noise reduction component 21 and the second noise reduction component 22 include an outer frame 23 and a noise reduction body 24. The outer frame 23 is circumferentially arranged around the edge of the noise reduction body 24, thus protecting the noise reduction body 24. The outer frame 23 is connected to the inner wall of the outer shell 1. This arrangement can keep the position of the noise reduction body 24 stable in the noise reduction cavity 11. If the noise reduction body 24 shakes significantly after being impacted by sound waves, its structural stability will be affected. This will not only affect the noise reduction effect but may also cause structural fatigue and durability problems of the noise reduction component 2.

[0034] Furthermore, the outer frame 23 avoids the sides of the noise reduction body 24 that are respectively opposite to the smoke inlet 12 and the smoke outlet 13. This can prevent the air from having too much contact with the outer frame 23 after entering the noise reduction cavity 11 through the smoke inlet 12, thus generating a large amount of noise. This can reduce the noise generated in the noise reduction cavity 11 and help improve the noise reduction effect of the noise reduction device 10.

[0035] According to an embodiment of this utility model, the noise reduction body 24 includes a noise reduction mesh, which is wave-shaped. Specifically, the noise reduction mesh can reduce noise propagation by absorbing, reflecting, and diffracting sound waves. The noise reduction mesh in this utility model embodiment includes, but is not limited to, a steel noise reduction mesh. Steel noise reduction meshes have high density and rigidity, effectively blocking and reflecting sound waves, and are particularly effective at reducing high-frequency noise. In the prior art, noise reduction meshes typically have sound-absorbing materials added to their surface or interior. These materials can further reduce noise levels and are suitable for handling low-to-mid-frequency noise. Thus, using a noise reduction mesh as the noise reduction body 24 in this utility model can effectively reduce noise in the range hood 100.

[0036] Furthermore, the noise reduction mesh is designed in a wave shape. On the one hand, this increases its surface area, which can absorb or reflect more sound waves in the noise reduction cavity 11 to improve the noise reduction effect. On the other hand, compared with a planar structure, the wave shape design can increase the rigidity and stability of the structure, which can reduce the possibility of deformation of the noise reduction body 24 due to external forces, thereby improving the durability of the noise reduction body 24.

[0037] Combination Figure 2 and Figure 3 As shown, the noise reduction device 10 also includes an oil guide groove 3, which is disposed between the lower end of the first noise reduction component 21 and the lower end of the second noise reduction component 22, and extends in the front-back direction. The lower ends of the first noise reduction component 21 and the lower ends of the second noise reduction component 22 are both provided with oil outlets, which are connected to the oil guide groove 3.

[0038] Specifically, in existing technologies, range hoods 100 are commonly used in cooking environments to exhaust indoor cooking fumes, thereby reducing the amount of oil fumes and particulate matter in the environment and preventing oil fumes from affecting air quality and harming health. The smoke collection device 20 collects the oil-fume-containing air and introduces it into the noise reduction chamber 11. The oil-fume-containing air directly contacts the noise reduction component 2. Air can pass through the noise reduction component 2, but some oil fume particles will adhere to the noise reduction mesh. As usage time increases, the oil fume particles attached to the noise reduction mesh will accumulate into waste oil, which will flow downwards or drip under gravity.

[0039] The oil guide groove 3 is set at the lower end of the first noise reduction component 21 and the second noise reduction component 22. In this way, the oil on the first noise reduction component 21 and the second noise reduction component 22 can flow downward along the first noise reduction component 21 and the second noise reduction component 22. The lower end of the first noise reduction component 21 is provided with an oil outlet, which allows the oil on the first noise reduction component 21 to flow to the oil guide groove 3 below it. The lower end of the second noise reduction component 22 is provided with an oil outlet, which allows the oil on the second noise reduction component 22 to flow to the oil guide groove 3 below it. This setting can not only ensure that the oil flows into the oil guide groove 3, but also use the gravity of the waste oil itself for guidance. There is no need to set other guiding components to guide the waste oil adsorbed on the first noise reduction component 21 and the second noise reduction component 22 to the oil guide groove 3, which can simplify the structural design of the noise reduction component 2.

[0040] Furthermore, the oil guide groove 3 extends in the front-to-back direction. This increases the area of ​​the oil guide groove 3 in the front-to-back direction, ensuring that oil droplets on the first noise reduction component 21 and the second noise reduction component 22 drip into the oil guide groove 3. On the other hand, it increases the capacity of the oil guide groove 3, preventing oil from overflowing when a large amount of oil drips from the first noise reduction component 21 and the second noise reduction component 22. This design prevents oil from dripping onto the ground and causing problems that are difficult to clean.

[0041] Combination Figure 2 , Figure 5 and Figure 6 As shown, the oil guide groove 3 is gradually inclined downward in the direction from front to back. This allows the oil in the oil guide groove 3 to flow from front to back under the action of gravity and flow into the waste oil recovery device. This can save the driving device for oil flow, simplify the structure of the noise reduction device 10, and facilitate the production and assembly of the smoke machine 100.

[0042] In some embodiments of this utility model, the waste oil recovery device can be installed at the bottom of the rear end of the smoke collection device 20. After the oil drips from the rear end of the oil guide groove 3, it can pass through the air outlet of the smoke collection device 20, pass through the internal air duct of the smoke collection device 20, and then fall into the waste oil recovery device.

[0043] In some other embodiments of this utility model, the waste oil recovery device can be directly installed at the rear end of the oil guide tank 3.

[0044] According to an embodiment of the present invention, there are multiple noise reduction components 2, and two adjacent noise reduction components 2 are designated as a first noise reduction component and a second noise reduction component, respectively. The upper end of the first noise reduction element 21 of the first noise reduction component and the upper end of the second noise reduction element 22 of the second noise reduction component are connected.

[0045] Specifically, in the embodiments of this utility model, there can be multiple noise reduction components 2, and each noise reduction component 2 is composed of a first noise reduction element 21 and a second noise reduction element 22. In each noise reduction component 2, the bottoms of the first noise reduction element 21 and the second noise reduction element 22 are connected, and the distance between the first noise reduction element 21 and the second noise reduction element 22 gradually increases in the direction from bottom to top.

[0046] Furthermore, in two adjacent noise reduction components 2, the first noise reduction element 21 in the first noise reduction component and the second noise reduction element 22 in the second noise reduction component are adjacent to each other. In order to ensure the structural integrity of the noise reduction component 2, the upper end of the first noise reduction element 21 in the first noise reduction component and the upper end of the second noise reduction element 22 in the second noise reduction component are connected. This allows the first noise reduction component and the second noise reduction component to be connected, so that multiple noise reduction components 2 are closely arranged and connected in the noise reduction cavity 11. This can avoid air leakage between two adjacent noise reduction components 2, increase the area of ​​noise reduction effect of the noise reduction component 2 on the airflow in the noise reduction cavity 11, and thus help improve the noise reduction effect.

[0047] Furthermore, in the top-down direction, the distance between the first noise reduction component and the second noise reduction component gradually increases. This allows the first noise reduction element 21 in the first noise reduction component and the second noise reduction element 22 in the second noise reduction component to be inclined relative to the horizontal plane. This allows the side of the first noise reduction element 21 in the first noise reduction component adjacent to the second noise reduction element 22 in the second noise reduction component to reflect sound waves, and the side of the second noise reduction element 22 in the second noise reduction component adjacent to the first noise reduction element 21 in the first noise reduction component to reflect sound waves. This increases the effective surface area of ​​multiple noise reduction components 2, which is beneficial to improving the noise reduction effect.

[0048] According to an embodiment of this utility model, the noise reduction component 2 is in the shape of a straight plate and is inclined relative to the horizontal plane. Specifically, the inclined straight plate-shaped noise reduction component 2 can guide the airflow from bottom to top, which is beneficial to improving the emission path of the oil fumes and allowing the airflow to pass through the noise reduction device 10 more smoothly, reducing friction noise caused by sudden changes in airflow direction. On the other hand, it can provide more reflective surfaces for sound waves, which is beneficial to the noise reduction component 2 absorbing or scattering sounds of different frequencies, thus reducing the noise level in a specific frequency range and improving the overall noise reduction effect of the range hood 100.

[0049] Furthermore, the tilted noise reduction component 2 can guide the oil adhering to it downwards into the oil guide tank 3, and then into the waste liquid recovery tank for easy cleaning.

[0050] According to an embodiment of the present invention, the smoke hood 100 includes a smoke collection device 20, a fan device 30, and a noise reduction device 10, wherein the noise reduction device 10 is disposed between the smoke collection device 20 and the fan device 30, the smoke inlet 12 is connected to the smoke collection device 20, and the smoke outlet 13 is connected to the fan device 30.

[0051] Specifically, the smoke inlet 12 is adapted to be connected to the smoke collection device 20 of the smoke machine 100. In this way, the air gathered by the smoke collection device 20 can enter the noise reduction device 10 through the smoke inlet 12, so that the noise reduction device 10 can reduce the noise of the air drawn in by the smoke collection device 20. The noise reduction cavity 11 is directly connected to the smoke collection device 20, which can reduce the noise of the air flowing in the smoke machine 100 more quickly, thereby reducing the impact of noise on the surrounding environment.

[0052] Furthermore, the smoke outlet 13 is adapted to be connected to the fan device 30 of the range hood 100. With this configuration, the air after being reduced by the noise reduction device 10 can flow through the smoke outlet 13 to the fan device 30, and then the fan device 30 can discharge the oil fumes gathered by the range hood 100 to the outside, so as to achieve the purpose of exhausting oil fumes.

[0053] Furthermore, the noise reduction device 10 is positioned between the smoke collection device 20 and the fan device 30. This allows the noise reduction device 10 to reduce the noise of the airflow drawn into the smoke machine 100 by the smoke collection device 20. The smoke reduced by the noise reduction device 10 is then discharged outdoors through the fan device 30. This arrangement can reduce the noise level of the smoke machine 100 during operation, reduce the impact of the noise generated by the smoke machine 100 on the environment and the harm to health, and ensure the cleanliness of the indoor environment.

[0054] Combination Figure 2As shown, the smoke collection device 20 has an air inlet 201, and the noise reduction device 10 includes an oil guide groove 3. The oil guide groove 3 is located at the lower end of the noise reduction component 2 and extends in the front-to-back direction. The oil outlet end of the oil guide groove 3 avoids the air inlet 201. Specifically, indoor air containing oil fumes can enter the smoke collection device 20 through the air inlet 201. The oily air entering the smoke collection device 20 can flow upward under the drive of the fan device 30, and enter the noise reduction device 10 through the air inlet 201 and then flow to the noise reduction component 2. The oil adhering to the noise reduction component 2 flows downward to the oil guide groove 3 at the bottom of the noise reduction component 2, and then flows along the oil guide groove 3 to the oil cup located at the bottom of the smoke collection device 20. That is, while the oil in the oil guide groove 3 flows in the smoke collection device 20, the oil in the oil guide groove 3 flows downward to the oil guide groove 3 at the bottom of the smoke collection device 20. There is airflow inside the smoke collection device 20. In this embodiment of the invention, the oil outlet of the oil guide groove 3 is arranged to avoid the air inlet 201 of the smoke collection device 20. Specifically, the air inlet 201 and the oil outlet of the oil guide groove 3 are spaced apart in the front-to-back direction. In this way, the oil flowing out from the oil outlet of the oil guide groove 3 can avoid the oil fumes flowing into the smoke collection device 20 from the air inlet 201. This can prevent the airflow in the smoke collection device 20 from bringing the oil flowing out from the oil guide groove 3 back to the noise reduction device 10, thereby preventing the increase of noise in the range hood 100 and preventing the reduction of oil fume exhaust efficiency.

[0055] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "circumferential", "radial", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A noise reduction device for a range hood, characterized in that, include: The outer shell (1) has a noise reduction cavity (11) inside. The upper and lower sides of the noise reduction cavity (11) are open to form a smoke inlet (12) and a smoke outlet (13) respectively. The noise reduction component (2) is disposed in the noise reduction cavity (11). The plane perpendicular to the vertical direction is set as the horizontal plane. The orthographic projection of the noise reduction component (2) on the horizontal plane at least covers the orthographic projection of the smoke inlet (12) and / or the smoke outlet (13) on the horizontal plane.

2. The noise reduction device for a range hood according to claim 1, characterized in that, The noise reduction component (2) includes a first noise reduction element (21) and a second noise reduction element (22). The first noise reduction element (21) and the second noise reduction element (22) are both at least partially inclined relative to the horizontal plane. The lower end of the first noise reduction element (21) and the lower end of the second noise reduction element (22) are connected. In the direction from bottom to top, the distance between the first noise reduction element (21) and the second noise reduction element (22) gradually increases.

3. The noise reduction device for a range hood according to claim 2, characterized in that, The first noise reduction component (21) and the second noise reduction component (22) both include an outer frame (23) and a noise reduction body (24). The outer frame (23) is circumferentially arranged around the edge of the noise reduction body (24), and the outer frame (23) avoids the two sides of the noise reduction body (24) that are respectively corresponding to the smoke inlet (12) and the smoke outlet (13). The outer frame (23) is connected to the inner wall of the outer shell (1).

4. The noise reduction device for a range hood according to claim 3, characterized in that, The noise reduction body (24) includes a noise reduction mesh, which is wavy.

5. The noise reduction device for a range hood according to claim 2, characterized in that, It also includes an oil guide groove (3), which is located between the lower end of the first noise reduction component (21) and the lower end of the second noise reduction component (22) and extends in the front-back direction. Both the lower end of the first noise reduction component (21) and the lower end of the second noise reduction component (22) are provided with oil outlets, which are connected to the oil guide groove (3).

6. The noise reduction device for a range hood according to claim 5, characterized in that, The oil guide groove (3) is gradually inclined downward in the direction from front to back.

7. The noise reduction device for a range hood according to claim 3, characterized in that, There are multiple noise reduction components (2). Two adjacent noise reduction components (2) are designated as the first noise reduction component and the second noise reduction component, respectively. The upper end of the first noise reduction element (21) of the first noise reduction component is connected to the upper end of the second noise reduction element (22) of the second noise reduction component. The distance between the first noise reduction component and the second noise reduction component gradually increases in the direction from top to bottom.

8. The noise reduction device for a range hood according to claim 1, characterized in that, The noise reduction component (2) is in the shape of a straight plate and is inclined relative to the horizontal plane.

9. A range hood, characterized in that, include: Smoke collection device (20); A fan device (30) is disposed above the smoke collection device (20) and connected to the smoke collection device (20); The noise reduction device (10) of the smoke machine (100) according to any one of claims 1-8, wherein the noise reduction device (10) is disposed between the smoke collection device (20) and the fan device (30), the smoke inlet (12) is connected to the smoke collection device (20), and the smoke outlet (13) is connected to the fan device (30).

10. The range hood according to claim 9, characterized in that, The smoke collection device (20) has an air inlet (201), and the noise reduction device (10) includes an oil guide groove (3). The oil guide groove (3) is located at the lower end of the noise reduction component (2) and extends in the front-back direction. The oil outlet end of the oil guide groove (3) avoids the air inlet (201).

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