Range Hood

Abstract

This utility model discloses a range hood, comprising: a smoke-gathering device with an air outlet; and a noise-reducing device disposed on top of the smoke-gathering device, the noise-reducing device having a smoke inlet, the smoke inlet being opposite to and communicating with a portion of the air outlet, and a forward-extending base plate at the bottom of the noise-reducing device, the base plate being opposite to another portion of the air outlet and connected to the edge of the air outlet. Therefore, by designing this range hood, the smoke-gathering device and the noise-reducing device can be easily installed and adapted without modification, reducing the need for structural modifications due to incompatibility. Furthermore, both can be directly reused independently, facilitating future maintenance and replacement, thereby improving the versatility and economy of the range hood.

Description

Technical Field

[0001] This utility model relates to the field of smoke hood technology, and in particular to a smoke hood. Background Technology

[0002] A range hood, also known as a kitchen exhaust hood or cooking hood, is a kitchen appliance used to purify the kitchen environment. Installed above the stove, it quickly removes waste from combustion and harmful fumes produced during cooking, venting 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. Furthermore, the exhaust duct generates considerable noise during operation, so range hoods typically incorporate noise reduction devices to minimize noise.

[0003] In related technologies, existing noise reduction devices require separate design for different types of smoke collection devices to achieve the desired installation and adaptation effect, which increases the production process and overall manufacturing cost of range hoods. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of this utility model is to provide a smoke hood that allows the smoke collection device and the noise reduction device to be installed and adapted without modification, reducing the problem of structural modification required due to incompatibility between the two, and both can be directly reused independently, facilitating later maintenance and replacement.

[0005] According to a first aspect of the present invention, a smoke hood includes: a smoke collection device having an air outlet; and a noise reduction device disposed on the top of the smoke collection device, having a smoke inlet that is opposite to and communicates with a portion of the air outlet, and a forward-extending base plate at the bottom of the noise reduction device that is opposite to another portion of the air outlet and connected to the edge of the air outlet.

[0006] Therefore, by setting up this smoke hood, the smoke collection device and the noise reduction device can be installed and adapted without modification, reducing the problem of structural modification required due to the incompatibility of the two. Moreover, both can be reused directly and independently, which is convenient for later maintenance and replacement, thereby improving the versatility and economy of the smoke hood.

[0007] In some examples of this utility model, at least one of the front side and the left and right sides of the base plate is provided with a first flange, and the wall of the air outlet is provided with a second flange. The first flange is attached to and connected to the second flange.

[0008] In some examples of this utility model, the noise reduction device further includes two side plates arranged opposite each other in the left-right direction, the side plates being attached to and connected to the second flange.

[0009] In some examples of this utility model, the noise reduction device further 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 the smoke inlet and the smoke outlet respectively, and the bottom plate is provided at the bottom of the housing; and a noise reduction component, wherein the noise reduction component is disposed inside the noise reduction cavity and located above the smoke inlet.

[0010] In some examples of this utility model, the outer shell includes: a front panel; a rear panel disposed behind the front panel; and side panels connected to the left and right sides of the front panel and the rear panel respectively, to jointly define the noise reduction cavity; wherein, the bottom plate is connected to the front of the bottom of the front panel and is bent relative to the front panel.

[0011] In some examples of this utility model, the front panel is detachably disposed on the side panel. According to the smoke hood of claim 1, a plane perpendicular to the vertical direction is defined as a horizontal plane, and 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.

[0012] In some examples of this utility model, the smoke hood further includes: a fan device located above the noise reduction device, the fan device having an air intake; and an air outlet pipe located above the noise reduction device, along the smoke exhaust direction, the first end of the air outlet pipe being opposite to and connected to the smoke outlet, and the second end of the air outlet pipe being connected to the air intake.

[0013] In some examples of this utility model, the range hood further includes: an air outlet seat, which is disposed on the top of the noise reduction device, the air outlet seat is connected between the smoke outlet and the first end of the air outlet pipe, and the width of the air outlet seat gradually decreases along the smoke exhaust direction in the left-right direction and / or front-back direction.

[0014] In some examples of this utility model, the noise reduction device of the range hood further includes a mounting plate, which is provided with a range hood mounting part for suspending the range hood.

[0015] 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

[0016] 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 structural schematic diagram of a range hood according to an embodiment of the present utility model; Figure 2 This is a structural schematic diagram of the range hood according to another angle of an embodiment of the present utility model; Figure 3 This is an exploded view of a range hood according to an embodiment of the present utility model; Figure 4 This is a partial structural schematic diagram of a range hood according to an embodiment of the present utility model; Figure 5 This is a cross-sectional view of a noise reduction device according to an embodiment of the present utility model; Figure 6 This is a partial structural schematic diagram of a noise reduction device according to an embodiment of the present utility model.

[0017] Figure label: 100. Range hood; 10. Smoke collection device; 11. Air outlet; 111. Second flange; 20. Noise reduction device; 21. Smoke inlet; 211. Smoke outlet; 22. Base plate; 221. First flange; 23. Side plate; 24. Outer shell; 241. Front plate; 242. Rear plate; 25. Noise reduction assembly; 251. Noise reduction plate; 252. Frame; 253. Noise reduction mesh; 26. Hanging plate; 261. Range hood mounting section; 27. Noise reduction cavity; 30. Fan device; 31. Air intake; 32. Air exhaust; 40. Air outlet pipe; 41. First end; 42. Second end; 50. Air outlet base. Detailed Implementation

[0018] 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.

[0019] The following is for reference. Figures 1-6 The smoke hood 100 according to the present utility model embodiment can be easily installed and adapted to the smoke collection device 10 and the noise reduction device 20 without modification, reducing the problem of structural modification due to the incompatibility of the two structures. Moreover, both can be directly reused independently, which is convenient for later maintenance and replacement.

[0020] Combination Figures 1-6As shown, the range hood 100 according to the first aspect embodiment of the present invention includes a smoke-gathering device 10 and a noise reduction device 20. The smoke-gathering device 10 is used to gather and collect diffused cooking fumes; the noise reduction device 20 is used to reduce the noise generated during the operation of the range hood 100 (such as the impact noise generated by the airflow of cooking fumes), thereby reducing the noise energy perceived by the user.

[0021] Specifically, the smoke collection device 10 is provided with an air outlet 11, and the noise reduction device 20 is provided on the top of the smoke collection device 10. The noise reduction device 20 has a smoke inlet 21, which is arranged opposite to a part of the air outlet 11 and is connected to the air outlet 11. The bottom of the noise reduction device 20 is provided with a forward-extending base plate 22, which is arranged opposite to another part of the air outlet 11 and is connected to the edge of the air outlet 11.

[0022] Specifically, since the smoke inlet 21 of the noise reduction device 20 and the air outlet 11 of the smoke collection device 10 are connected, the oil fumes in the smoke collection device 10 can flow sequentially through the air outlet 11 and the smoke inlet 21 into the noise reduction device 20. The smoke inlet 21 is positioned opposite to a part of the air outlet 11, and the base plate 22 is positioned opposite to another part of the air outlet 11. That is, the base plate 22 can cover the part of the smoke inlet 21 that does not correspond to the air outlet 11. This can prevent the oil fumes in the smoke collection device 10 from being dissipated to the outside through the other part of the air outlet 11 as desired, thereby ensuring the accuracy of the oil fume exhaust direction. Moreover, the base plate 22 can also establish a connection with the edge of the air outlet 11, so that while ensuring that the smoke collection device 10 and the noise reduction device 20 are interconnected, they can also be connected into a solid whole.

[0023] In particular, since the smoke collection device 10 does not need to be designed and modified according to the structure of the noise reduction device 20, that is, the noise reduction device 20 is specially designed with a base plate 22 to match the air outlet 11 of the smoke collection device 10, the installation compatibility of the smoke collection device 10 can be improved.

[0024] Alternatively, compared to the existing structure where the air outlet of the smoke collection chamber is directly connected to the air outlet pipe (because the smoke collection device has a smoke collection chamber inside, but the space of the smoke collection chamber is large, while the air outlet of the smoke collection chamber is small, when the airflow in the smoke collection chamber flows out through the air outlet, the airflow velocity will change abruptly. The smaller the air outlet of the smoke collection chamber, the greater the airflow velocity when flowing through the air outlet of the smoke collection chamber, and the greater the noise), in the embodiment of this case, during the airflow process in the smoke collection chamber, the smoke inlet 21 of the noise reduction device 20 and the air outlet 11 of the smoke collection device 10 are arranged relative to each other with the largest possible area. Therefore, during the process of the airflow flowing from the smoke collection device 10 to the noise reduction device 20, the airflow space does not change abruptly, the resistance of the airflow when flowing out of the smoke collection chamber will be reduced, and the airflow can enter the noise reduction device 20 more quickly. The noise of the airflow entering the noise reduction device 20 and flowing out of the noise reduction device 20 is smaller. Furthermore, the noise reduction device 20 is placed close to the user, reducing the noise perceived by the user.

[0025] Therefore, by setting up the smoke hood 100, the smoke collection device 10 can be easily installed and adapted to the noise reduction device 20 without modification, reducing the problem of structural modification due to the incompatibility of the two structures. Moreover, both can be reused directly and independently, which is convenient for later maintenance and replacement, thereby improving the versatility and economy of the smoke hood 100.

[0026] According to some optional embodiments of the present invention, combined with Figures 3-6 As shown, at least one of the front side and the left and right sides of the base plate 22 is provided with a first flange 221, and the wall of the air outlet 11 is provided with a second flange 111. The first flange 221 is attached to the second flange 111 and the first flange 221 is connected to the second flange 111. For example, the base plate 22 is provided with a first flange 221 on both the front side and the left and right sides.

[0027] The first flange 221 is attached to the second flange 111, which increases the contact area between the two, making the connection more stable and avoiding loosening or deformation caused by excessive force on a single connection point. The double structure formed by the first flange 221 and the second flange 111 can enhance the sealing of the connection between the two, reducing problems such as oil fume leakage, dust infiltration or noise leakage caused by gaps between the two. The mutual attachment of the first flange 221 and the second flange 111 can also disperse the connection stress between the base plate 22 and the wall of the air outlet 11, reduce the wear and tear of the range hood 100 caused by vibration and temperature changes during long-term use, extend the service life of the overall structure, and make the assembly process more convenient, achieving precise docking without complicated positioning.

[0028] Specifically, in combination Figures 1-6As shown, the noise reduction device 20 also includes two side plates 23 arranged opposite each other in the left-right direction. The side plates 23 are attached to the second flange 111 and are connected to the second flange 111.

[0029] Understandably, the second flange 111 is attached to the side plate 23 of the noise reduction device 20, which can further increase the contact area between the smoke collection device 10 and the noise reduction device 20, making the connection between the two more stable. Moreover, the double structure formed by the second flange 111 and the side plate 23 can further enhance the sealing of the connection between the two, reducing problems such as oil fume leakage, dust infiltration or noise leakage caused by gaps between the two. The mutual attachment of the second flange 111 and the side plate 23 can also disperse the connection stress between the noise reduction device 20 and the wall of the air outlet 11, reduce the wear and tear of the range hood 100 caused by vibration and temperature changes during long-term use, extend the service life of the overall structure, and make the assembly process more convenient, achieving precise docking without complex positioning.

[0030] According to some optional embodiments of the present invention, combined with Figures 1-6 As shown, the noise reduction device 20 also includes a housing 24 and a noise reduction component 25. A noise reduction cavity 27 is provided inside the housing 24. The upper and lower sides of the noise reduction cavity 27 are open to form a smoke inlet 21 and a smoke outlet 211, respectively. A base plate 22 is provided at the bottom of the housing 24. The noise reduction component 25 is disposed inside the noise reduction cavity 27 and is located above the smoke inlet 21.

[0031] The smoke inlet 21 of the outer shell 24 serves as the channel for the oil fumes in the smoke collection device 10 to enter the noise reduction device 20. The noise reduction component 25 inside the outer shell 24 is located above the smoke inlet 21, which facilitates the noise reduction component 25 to perform noise reduction treatment on the airflow after entering the outer shell 24 (such as absorbing high-frequency noise through sound-absorbing materials or weakening sound wave energy through structural design (such as porous cavity)), thereby reducing the transmission of airflow noise to the inside and outside of the outer shell 24.

[0032] Specifically, a noise reduction cavity 27 is provided inside the outer casing 24, which can accommodate the air entering the noise reduction device 20 to increase the time that the air collected by the range hood 100 exists in the noise reduction device 20, thus helping the noise reduction device 20 to eliminate more noise. The upper and lower sides of the noise reduction cavity 27 are open to form the smoke inlet 21 and the smoke outlet 211 of the noise reduction device 20, respectively. The smoke inlet 21 and the smoke outlet 211 are connected to each other, so that air can flow between the smoke inlet 21 and the smoke outlet 211 to ensure the normal flow of oil fumes in the noise reduction device 20 and finally discharge them from the range hood 100. The noise reduction component 25 is disposed in the noise reduction cavity 27. This provides a stable and reliable placement space for the noise reduction component 25 and allows the noise reduction component 25 to fully contact the sound waves generated by the friction of the air in the noise reduction cavity 27 to absorb noise.

[0033] Furthermore, the noise reduction component 25 inside the housing 24 is located above the smoke inlet 21, which facilitates the noise reduction component 25 to perform noise reduction treatment on the airflow after entering the noise reduction cavity 27 (such as absorbing high-frequency noise through sound-absorbing materials or weakening sound wave energy through structural design (such as porous cavity), thereby reducing the transmission of airflow noise to the inside and outside of the housing 24.

[0034] Furthermore, since the length of the second flange 111 on the smoke collection device 10 is fixed, the thickness of the noise reduction cavity 27 (the dimension of the noise reduction cavity 27 in the front-back direction) can be adjusted according to the design requirements, and the length of the first flange 221 can be adjusted accordingly to meet the size connection and adaptation requirements between the noise reduction device 20 and the second flange 111.

[0035] Specifically, in combination Figures 1-6 As shown, the outer shell 24 includes a front plate 241, a rear plate 242 and a side plate 23. The rear plate 242 is located behind the front plate 241. The side plates 23 are connected to the left and right sides of the front plate 241 and the rear plate 242 respectively, so as to jointly define the noise reduction cavity 27. The bottom plate 22 is connected to the front of the bottom of the front plate 241, and the bottom plate 22 is bent relative to the front plate 241.

[0036] It is understandable that the front plate 241 and the rear plate 242 are arranged opposite each other in the front-rear direction. The front plate 241, the rear plate 242 and the two side plates 23 in the left and right directions are connected to each other to form a closed shell 24. This allows the front plate 241, the rear plate 242 and the side plates 23 to form a closed force transmission path, which helps to disperse the loads they receive, avoid local stress concentration, and thus effectively improve the structural reliability of the shell 24 and enhance its resistance to deformation.

[0037] In addition, the noise reduction cavity 27 can provide structural protection and installation accommodation for the noise reduction component 25 inside, avoiding the risk of damage to the noise reduction component 25 due to direct contact with the outside. At the same time, the outer shell 24 can form an acoustic barrier, which is conducive to the noise reduction component 25 acting more concentratedly on the sound waves inside the outer shell 24. That is, when noise propagates inside the outer shell 24, the plates around the outer shell 24 cooperate with the noise reduction component 25 to reflect and absorb sound wave energy, and reduce the diffusion of noise to the outside of the outer shell 24, thereby enhancing the overall noise reduction efficiency of the noise reduction device 20.

[0038] In addition, the above-mentioned splicing structure is easy to manufacture and assemble (each board can be processed separately and then spliced), and the internal space size can be flexibly adjusted according to the noise reduction requirements, so as to adapt to different specifications of noise reduction components 25, thereby taking into account functionality, durability and production convenience.

[0039] Alternatively, combined Figure 4 and Figure 5As shown, the front plate 241 and the bottom plate 22 are integrally formed. This arrangement can reduce the number of parts and assembly time of the outer shell 24, thereby reducing assembly steps, reducing manufacturing costs, and improving production efficiency. It can also avoid the fitting errors that may occur in traditional multi-part assembly, thereby improving the precision and consistency of the product. It can also reduce stress concentration points (due to the absence of seams and welds), thereby improving the overall structural strength and rigidity of the outer shell 24, and thus improving the service life of the outer shell 24.

[0040] Furthermore, the front panel 241 is detachably mounted on the side panel 23. This arrangement allows users to easily install and remove the front panel 241 from the housing 24 according to their needs, thereby improving the ease of operation for users when taking out and putting away the noise reduction component 25. Compared to the traditional method of using a non-removable integrated housing, where the front panel cannot be removed separately, making it difficult to directly remove the noise reduction component 25 attached inside the housing for maintenance and replacement, the embodiment in this case allows for flexible disassembly and separation of the front panel 241, which facilitates the maintenance and replacement of the noise reduction component 25 and reduces the cost of subsequent maintenance and replacement.

[0041] Specifically, a plane perpendicular to the vertical direction is defined as a horizontal plane, and the orthographic projection of the noise reduction component 25 on the horizontal plane at least covers the orthographic projection of the smoke inlet 21 and / or the smoke outlet 211 on the horizontal plane.

[0042] The above arrangement allows the sound waves entering the noise reduction device 20 from the smoke inlet 21 to be transmitted to the noise reduction component 25 as much as possible. This arrangement can improve the reliability of the noise reduction device 20 and minimize the impact of the smoke machine 100 noise on the surrounding environment and human health.

[0043] Furthermore, the range hood 100 also includes a fan device 30. Along the exhaust direction, the fan device 30 is connected downstream of the noise reduction device 20. The plane perpendicular to the vertical direction is set as a horizontal plane. The orthographic projection of the noise reduction component 25 on the horizontal plane at least covers the orthographic projection of the exhaust port 211 on the horizontal plane. This allows the sound waves in the noise reduction cavity 27 to pass through the noise reduction component 25 as much as possible before being transmitted to the fan device 30. This arrangement can improve the reliability of the noise reduction device 20 and minimize the noise generated by the range hood 100, thereby reducing the impact of noise on the surrounding environment and human health.

[0044] Furthermore, by defining a plane perpendicular to the vertical direction as a horizontal plane, the orthographic projection of the noise reduction component 25 on the horizontal plane at least covers the orthographic projections of the smoke inlet 21 and the smoke outlet 211 on the horizontal plane. This not only allows the sound waves entering the noise reduction device 20 from the smoke inlet 21 to be transmitted to the noise reduction component 25 as much as possible, but also allows the sound waves in the noise reduction cavity 27 to pass through the noise reduction component 25 as much as possible before being transmitted to the fan device 30. With this configuration, the air entering the noise reduction device 20 can be sufficiently noise-reduced, the noise reduction effect of the noise reduction component 25 can be maximized, and the impact of the smoke machine 100 noise on the surrounding environment and human health can be reduced as much as possible.

[0045] Specifically, in combination Figures 1-4 As shown, the range hood 100 also includes a fan device 30 and an exhaust pipe 40. The fan device 30 is located above the noise reduction device 20 and is provided with an air intake 31. The exhaust pipe 40 is located above the noise reduction device 20. Along the exhaust direction, the first end 41 of the exhaust pipe 40 is opposite to the smoke outlet 211 of the noise reduction device 20 and is connected to the smoke outlet 211 of the noise reduction device 20. The second end 42 of the exhaust pipe 40 is connected to the air intake 31.

[0046] Understandably, the fan device 30 mainly serves as the power source for extracting oil fumes. It generates negative pressure by driving the impeller to rotate at high speed through a motor, which quickly draws in the oil fumes collected by the smoke collection device 10 and discharges them to the outside of the range hood 100, thereby achieving the effect of extracting oil fumes.

[0047] The exhaust duct 40 serves as a channel for guiding cooking fumes. Along the exhaust direction, the first end 41 of the exhaust duct 40 is connected to the exhaust port 211 of the noise reduction device 20, and the second end 42 is connected to the air intake 31 of the fan device 30. This facilitates the smooth flow of cooking fumes from the noise reduction device 20 to the fan device 30. Furthermore, users can flexibly adjust the extension direction of the exhaust duct 40 according to the kitchen layout to achieve a planned exhaust path, thereby improving kitchen space utilization and user experience while ensuring efficient exhaust of cooking fumes.

[0048] In detail, when the range hood 100 is working, the smoke collection device 10 restricts the spread of oil fumes and guides the oil fumes through the air outlet duct 40 to a position connected to the fan device 30, so that they can be efficiently sucked away by the fan device 30. This enables the range hood 100 to perform the function of sucking oil fumes and meets the user's needs.

[0049] Furthermore, since the smoke collection device 10 and the fan device 30 are independent components, the smoke hood 100 of this application can be a split structure. Therefore, only the orientation of the smoke outlet of the fan device 30 needs to be adjusted, without adjusting the entire smoke hood 100, to achieve adaptive adjustment of the overall smoke outlet direction of the smoke hood 100. This can expand the application scenarios of the smoke hood 100, enhance the product competitiveness of the smoke hood 100, and improve the user experience.

[0050] Among them, the smoke collection device 10 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 smoke collection device, etc.

[0051] Furthermore, combined Figures 1-4 As shown, the range hood 100 also includes an air outlet seat 50, which is located on the top of the noise reduction device 20. The air outlet seat 50 is connected between the smoke outlet 211 and the first end 41 of the air outlet pipe 40. The width of the air outlet seat 50 in the left-right direction and / or front-back direction gradually decreases along the smoke exhaust direction.

[0052] Understandably, the air outlet seat 50 can provide a stable structural support for the air outlet duct 40, thereby ensuring the positional stability of the air outlet duct 40. Since the air outlet seat 50 is connected between the smoke outlet 211 and the first end 41 of the air outlet duct 40, the fumes can flow smoothly along the flow path of the smoke outlet 211 of the noise reduction device 20 - air outlet seat 50 - first end 41 of the air outlet duct 40 - second end 42 of the air outlet duct 40 - air intake 31 of the fan device 30.

[0053] The width of the air outlet seat 50 gradually decreases along the smoke exhaust direction in the left-right and / or front-back directions. This allows the air outlet seat 50 to form a gradually narrowing airflow guiding structure. In other words, the air outlet seat 50 can form a buffer transition area for the airflow from the smoke outlet 21 of the noise reduction device 20 to the air intake 31 of the fan device 30, thereby avoiding excessive noise caused by a sudden change in the flow cross-sectional area. Furthermore, the air outlet duct 40 is far from the user, and the fan device 30 connected to the air outlet duct 40 is even farther from the user, which can reduce the noise energy perceived by the user.

[0054] Moreover, the arrangement of the air outlet seat 50 can facilitate the gradual increase of the exhaust speed of the oil fumes in the air outlet seat 50, thereby reducing the residence time of the oil fumes in the air outlet seat 50 and reducing the probability of oil stains adhering. In addition, the narrowing of the width of the air outlet seat 50 can focus the exhaust direction and enhance the directional impact of the oil fumes, avoiding the problem of airflow diffusion at the exhaust port 211 of the air outlet seat 50, which leads to a decrease in exhaust efficiency.

[0055] In addition, the tapered design of the air outlet 50 can reduce the airflow turbulence at the air outlet 11 and reduce wind noise caused by air vortices, thus making the smoke exhaust process more efficient and quiet.

[0056] Specifically, in combination Figures 3-6 As shown, the noise reduction device 20 also includes a mounting plate 26, which is provided with a range hood mounting part 261 for suspending the range hood 100.

[0057] Understandably, the range hood mounting section 261 on the mounting plate 26 can hang the range hood 100 on the mounting surface (such as a wall, cabinet surface, etc.). For example, the range hood mounting section 261 can be a hanging groove, and the mounting surface is provided with hooks that are compatible with the hanging groove, so that the range hood 100 can be quickly and reliably hung on the mounting surface, thereby improving the installation efficiency of the range hood 100.

[0058] Alternatively, in combination Figure 5 and Figure 6 As shown, the noise reduction component 25 includes two noise reduction plates 251 arranged opposite to each other. Each noise reduction plate 251 includes a frame 252 and a noise reduction mesh 253. The noise reduction mesh 253 is disposed on the frame 252 and has a wave-shaped structure.

[0059] The frame 252 provides stable support for the noise reduction net 253, preventing the net from deforming due to airflow impact or long-term use. The wave-shaped structure of the noise reduction net 253 increases the surface area and extends the contact path between the sound wave and the net surface. When noise passes through the noise reduction net 253, the undulating shape causes the sound wave to be continuously reflected and refracted on the uneven surface. This enhances the absorption effect of the sound-absorbing material (such as the sound insulation cotton attached to the noise reduction net 253) on the sound wave energy, and also weakens the propagation force of noise through structural damping.

[0060] In addition, the wave-shaped design of the noise reduction mesh 253 can form more tiny sound-absorbing grooves in a limited space, further decomposing sound wave vibrations. Moreover, this shape is better able to buffer the impact of airflow and reduce wind noise generated when airflow passes through compared to a planar mesh. Thus, the noise reduction mesh 253 can achieve the dual noise reduction effect of passive sound absorption and active noise cancellation while ensuring ventilation.

[0061] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", 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.

[0062] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0063] 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.

[0064] 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 range hood (100), characterized in that, include: Smoke collection device (10), wherein the smoke collection device (10) is provided with an air outlet (11); A noise reduction device (20) is disposed on the top of the smoke collection device (10). The noise reduction device (20) has a smoke inlet (21). The smoke inlet (21) is disposed opposite to and connected to a part of the air outlet (11). The bottom of the noise reduction device (20) is provided with a forward-extending base plate (22). The base plate (22) is disposed opposite to another part of the air outlet (11) and connected to the edge of the air outlet (11).

2. The range hood (100) according to claim 1, characterized in that, At least one of the front side and the left and right sides of the base plate (22) is provided with a first flange (221), and the wall of the air outlet (11) is provided with a second flange (111). The first flange (221) is attached to the second flange (111) and connected to the second flange (111).

3. The range hood (100) according to claim 2, characterized in that, The noise reduction device (20) further includes: Two side plates (23) are arranged opposite each other in the left-right direction. The side plates (23) are attached to the second flange (111) and connected to the second flange (111).

4. The range hood (100) according to claim 1, characterized in that, The noise reduction device (20) further includes: The outer shell (24) has a noise reduction cavity (27) inside. The upper and lower sides of the noise reduction cavity (27) are open to form the smoke inlet (21) and the smoke outlet (211) respectively. The bottom plate (22) is provided at the bottom of the outer shell (24). Noise reduction component (25), which is disposed in the noise reduction cavity (27) and located above the smoke inlet (21).

5. The range hood (100) according to claim 4, characterized in that, The outer casing (24) includes: front plate(241); A rear plate (242) is disposed behind the front plate (241); Side plate (23), the side plate (23) is connected to the left and right sides of the front plate (241) and the rear plate (242) respectively, so as to jointly define the noise reduction cavity (27). The bottom plate (22) is connected to the front of the bottom of the front plate (241) and is bent relative to the front plate (241).

6. The range hood (100) according to claim 5, characterized in that, The front panel (241) is detachably mounted on the side panel (23).

7. The range hood (100) according to claim 4, characterized in that, The plane perpendicular to the vertical direction is defined as the horizontal plane, and the orthographic projection of the noise reduction component (25) on the horizontal plane at least covers the orthographic projection of the smoke inlet (21) and / or the smoke outlet (211) on the horizontal plane.

8. The range hood (100) according to claim 4, characterized in that, Also includes: A fan device (30) is located above the noise reduction device (20), and the fan device (30) is provided with an air intake (31). Air outlet pipe (40) is located above the noise reduction device (20) along the smoke exhaust direction. The first end of the air outlet pipe (40) is opposite to and connected to the smoke outlet (211), and the second end of the air outlet pipe (40) is connected to the air intake (31).

9. The range hood (100) according to claim 8, characterized in that, Also includes: Air outlet seat (50) is disposed on the top of the noise reduction device (20). The air outlet seat (50) is connected between the smoke outlet (211) and the first end of the air outlet pipe (40). The width of the air outlet seat (50) in the left-right direction and / or front-back direction gradually decreases along the smoke exhaust direction.

10. The range hood (100) according to claim 1, characterized in that, The noise reduction device (20) further includes: The mounting plate (26) is provided with a range hood mounting part (261) for suspending the range hood (100).

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