A noise reduction type range hood

Abstract

The application relates to the technical field of kitchen equipment, in particular to a noise reduction type range hood. The range hood comprises a hood and a grille assembly; a smoke collecting cavity is formed in the hood; the smoke collecting cavity is provided with an air inlet; the air inlet is provided with a grille mounting structure; the grille assembly comprises at least one inlet grille; the at least one inlet grille is detachably connected with the grille mounting structure; air inlet holes are arranged on the inlet grille at intervals; flow guide pieces are arranged in the air inlet holes; the flow guide pieces are provided with flow guide flange portions; the flow guide flange portions extend to the inside of the smoke collecting cavity along the edges of the air inlet holes; sound absorption pad mounting structures are arranged between adjacent flow guide flange portions; and sound absorption pads are arranged in the sound absorption pad mounting structures. The structure of the inlet grille is designed, the noise at the air inlet of the range hood is greatly reduced, and the air inlet resistance and the oil fume suction effect are not affected.

Description

Technical Field

[0001] This application relates to the field of kitchen equipment technology, and in particular to a noise-reducing range hood. Background Technology

[0002] Range hoods, as an essential household appliance in the kitchen, play a vital role in people's lives. They effectively remove cooking fumes and other gases, preventing their spread and purifying the kitchen air. However, range hoods also generate considerable noise during operation, which negatively impacts the user experience.

[0003] Currently, most range hoods on the market employ structural noise reduction or sound-absorbing materials placed near the fan to reduce noise generated during operation. However, these solutions do not consider noise generated by other parts of the range hood. Other parts, such as the air inlet, also produce significant noise during operation. Without addressing the noise at the air inlet, a truly effective noise reduction cannot be achieved. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a noise-reducing range hood. By designing the inlet grille located at the air inlet of the range hood, the noise at the air inlet can be effectively reduced.

[0005] This application proposes a noise-reducing range hood, including a range hood cover and a grille assembly;

[0006] The smoke hood has a smoke collection chamber inside, the smoke collection chamber has an air inlet, and a grille installation structure is provided at the air inlet;

[0007] The grille assembly includes at least one inlet grille, and at least one inlet grille is detachably connected to the grille mounting structure;

[0008] The inlet grille is provided with air inlets at intervals, and air guides are provided in the air inlets;

[0009] The flow guide has a flow guide flange that extends along the edge of the air inlet into the smoke collection chamber.

[0010] A sound-absorbing pad mounting structure is provided between adjacent flow guide flanges, and a sound-absorbing pad is provided inside the sound-absorbing pad mounting structure.

[0011] In some alternative embodiments, the airflow guide is made of a sound-absorbing material.

[0012] In some optional embodiments, the flow guide is made of the same material as the inlet grille, and the flow guide and the inlet grille are integrally formed.

[0013] In some optional embodiments, the range hood further includes an exhaust assembly;

[0014] The exhaust assembly includes an exhaust hood;

[0015] The smoke collection chamber also has an air outlet, and the air outlet hood is disposed at the air outlet.

[0016] In some alternative embodiments, an exhaust duct is formed inside the exhaust hood, and a sound-absorbing structure is provided on the side wall of the exhaust duct.

[0017] In some alternative embodiments, the exhaust assembly further includes at least one noise reduction plate disposed within the exhaust duct.

[0018] In some alternative embodiments, at least one of the noise reduction boards includes a first noise reduction board and a second noise reduction board, which are cross-connected.

[0019] In some alternative embodiments, the range hood further includes a fan volute, wherein the first noise reduction plate is parallel to the tangential plane of the fan volute.

[0020] In some optional embodiments, the first noise reduction plate is provided with noise reduction micropores.

[0021] In some alternative embodiments, both the air vent and the noise reduction panel are made of sound-absorbing material.

[0022] The technical solution provided in this application has the following technical effects:

[0023] The noise-reducing range hood described in this application embodiment includes a range hood hood and a grille assembly. A smoke collection chamber is formed inside the range hood hood, and the smoke collection chamber has an air inlet. A grille mounting structure is provided at the air inlet. The grille assembly includes at least one inlet grille, and the at least one inlet grille is detachably connected to the grille mounting structure. Air inlet holes are spaced apart on the inlet grille, and guide elements are provided in the air inlet holes. The guide elements have guide flanges that extend along the edge of the air inlet holes into the smoke collection chamber. The guide elements can guide the airflow through the air inlet holes, thereby allowing the airflow to enter the smoke collection chamber smoothly and orderly, preventing excessive noise generated by the range hood during air intake. Furthermore, a sound-absorbing pad mounting structure is provided between adjacent guide flanges. A sound-absorbing pad is provided within the sound-absorbing pad mounting structure. The sound-absorbing pad can absorb the noise generated at the inlet grille, thereby further eliminating the noise generated at the range hood's air inlet. This range hood, through the design of the inlet grille structure, significantly reduces the noise at the range hood's air inlet without increasing air intake resistance or affecting the smoke extraction effect. Attached Figure Description

[0024] To more clearly illustrate the technical solutions and advantages in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural schematic diagram of a noise-reducing range hood provided in an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the structure of an air inlet for a smoke collection chamber provided in an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the structure of an imported grille provided in an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the structure of an air outlet hood provided in an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the structure of an exhaust assembly provided in an embodiment of this application;

[0030] Figure 6 This is a structural schematic diagram of a noise reduction board provided in an embodiment of this application.

[0031] The following is supplementary explanation of the attached figures:

[0032] 1-Smoke hood hood; 101-Air inlet; 102-Air outlet; 2-Grate assembly; 201-Air guide; 202-Sound absorption pad mounting structure; 3-Exhaust assembly; 301-Air outlet hood; 302-Exhaust duct; 303-Silencer structure; 304-Noise reduction panel; 305-First noise reduction panel; 306-Second noise reduction panel; 307-Noise reduction micropores; 4-Fan volute. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] It should be noted that the term "an embodiment" or "embodiment" in the specification of the embodiments of this application refers to a specific feature, structure, or characteristic that can be included in at least one implementation of this application. It should be understood that in the specification, claims, and accompanying drawings of the embodiments of this application, the terms "upper," "lower," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation on this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, in the description of this embodiment, unless otherwise stated, "a plurality of" means two or more. Additionally, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, or product that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0035] To make the objectives, technical solutions, and advantages disclosed in the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of this application and are not intended to limit the embodiments of this application.

[0036] Currently, noise reduction technologies for range hoods typically employ various sound-absorbing materials. These materials are usually placed near the range hood fan and need to be relatively thick to achieve a noise reduction effect. However, these noise reduction solutions do not comprehensively consider the noise across the entire frequency range of the range hood. Actual testing has revealed that, in addition to the noise from the fan, the noise generated at the air inlet and outlet also accounts for a significant portion of the range hood's operating noise. Furthermore, placing sound-absorbing materials at the air inlet and outlet can negatively impact the range hood's smoke extraction efficiency. Therefore, existing range hoods fail to address the noise source effectively and reduce noise along the entire noise propagation path. This results in poor overall noise control and a less than ideal noise reduction effect for the entire range hood.

[0037] In view of this, the present application provides a noise-reducing range hood.

[0038] Please see Figure 1 , Figure 1 This is a structural schematic diagram of a noise-reducing range hood provided in an embodiment of this application, as shown below. Figure 1 As shown, the noise-reducing range hood includes a range hood cover 1 and a grille assembly 2.

[0039] In this embodiment, the range hood 1 is the outer shell of the range hood, and a smoke collection chamber is formed inside the range hood 1. A range hood fan is installed inside the smoke collection chamber, and the range hood fan is used to draw the fumes into the smoke collection chamber and discharge the fumes from the smoke collection chamber to the outside. Figure 1 As shown, the smoke collection chamber has an air inlet 101, which is the entrance for oil fumes to enter the smoke collection chamber. A grille assembly 2 can be installed at the air inlet 101 to increase the speed at which oil fumes enter the smoke collection chamber.

[0040] Specifically, Figure 2 This is a schematic diagram of the structure of the air inlet 101 of the smoke collection chamber provided in an embodiment of this application, as shown below. Figure 2As shown, a grille mounting structure is provided at the air inlet 101. The grille assembly 2 includes at least one inlet grille, which is detachably connected to the grille mounting structure. Optionally, the grille mounting structure can install one or multiple inlet grilles. Among the multiple inlet grilles, one or all can be detachably connected to the grille mounting structure, facilitating cleaning of the inlet grilles and the smoke collection chamber. The connection between the inlet grille and the grille mounting structure can be a detachable connection method such as snap-fit ​​or screw connection. As an example, the grille mounting structure can be a slot or snap-fit ​​hole, with a snap-fit ​​part on the inlet grille that can snap into the slot or snap-fit ​​hole, thus connecting the inlet grille to the grille mounting structure. As another example, the inlet grille has a connecting through hole, and the grille mounting structure has a threaded hole, allowing the connection between the inlet grille and the grille mounting structure to be achieved using screws.

[0041] In the embodiments of this application, Figure 3 This is a schematic diagram of the structure of an imported grille provided in an embodiment of this application, as shown below. Figure 3 As shown, the inlet grille is provided with air inlet holes. These air inlet holes can be spaced apart on the inlet grille. Optionally, the air inlet holes can be round holes, elongated holes, or other regular or irregular shapes. The size of the air inlet holes can be uniform or non-uniform. As one optional implementation, such as... Figure 3 As shown, the air inlet can be an elongated hole with rounded ends. The air inlets can be distributed along the long side of the inlet grille, and the sides of the air inlets are parallel or approximately parallel to the short side of the inlet grille. The spacing between adjacent air inlets can be the same or different.

[0042] Continue as Figure 3As shown, a guide element 201 can be installed in the air inlet of the inlet grille. The guide element 201 can be a separate part and can be fixed in the air inlet by various methods such as bonding, welding, screw connection, riveting connection, and interference fit. In some embodiments, the guide element 201 can also be integrally formed with the air inlet, that is, the guide element 201 is integrally formed when the air inlet on the inlet grille is formed. The guide element 201 is used to guide the oil fumes entering the air inlet, thereby rectifying the oil fumes entering the smoke collection chamber to reduce oil fume turbulence and allow the oil fumes to pass through the air inlet smoothly and orderly. Specifically, the guide element 201 is a part with a central opening, the shape of which is similar to that of the air inlet, and the two match. The guide element 201 has a guide flange that extends along the edge of the air inlet into the interior of the smoke collection chamber. The guide flange surrounds the opening in the guide element 201. The guide flange extends into the smoke collection chamber, which on the one hand makes the flow of oil fumes more stable and less prone to diffusion due to external airflow disturbances, thus making the smoke exhaust process smoother. On the other hand, because the flow of oil fumes is stable and orderly, it can avoid generating a lot of noise when oil fumes enter the smoke collection chamber.

[0043] In this embodiment, the air guide 201 can be made of sound-absorbing material to absorb the noise generated when oil fumes enter the smoke collection chamber. Optionally, the sound-absorbing material for the air guide 201 includes, but is not limited to, sound insulation felt, polyurethane foam, and foamed rubber. In an optional embodiment, the sound-absorbing material for the air guide 201 can also be made of a thermoplastic composite material formed from novel long fibers of polyethylene terephthalate (PET). This material has a large number of micropores, excellent sound absorption and noise reduction functions, extremely low water absorption, high temperature resistance, flame retardancy, and excellent mechanical properties, including tear resistance and impact resistance. Using PET long-fiber thermoplastic composite material to make the air guide 201 can ensure the structural strength of the air guide 201 and achieve noise absorption at the air inlet, thereby improving the noise reduction effect of the range hood. Optionally, when manufacturing the air guide 201, the length of the air guide flange can be appropriately extended, which can increase the contact time between the noise and the sound-absorbing material at the air inlet, thereby improving the degree of noise absorption.

[0044] In some embodiments, the air inlet 101 of the range hood is a significant noise source. However, since the air inlet 101 is located at the front end, it greatly affects the smoke extraction effect. Therefore, it is not suitable to install sound-absorbing materials at the air inlet 101 for noise reduction. To reduce the noise at the air inlet 101, the entire inlet grille can be made of sound-absorbing material, thereby absorbing the noise at the air inlet 101. Optionally, the guide component 201 and the inlet grille can be made of the same material or different materials. When the guide component 201 and the inlet grille are made of the same material, the guide component 201 and the inlet grille can be integrally molded. Since the inlet grille needs to have a certain structural strength and high temperature resistance, it can be made of PET long-fiber sound-absorbing material through molding.

[0045] In this embodiment of the application, in order to further improve the sound absorption and noise reduction effect at the air inlet 101, a sound-absorbing pad mounting structure 202 can be provided between adjacent guide flanges, so that a sound-absorbing pad can be installed inside the sound-absorbing pad mounting structure 202. Figure 3 As shown, the sound-absorbing pad mounting structure 202 can be a slot structure. This slot structure utilizes the guide flange of the guide member 201 to form the two side walls of the slot, and forms the slot structure by setting a pair of side plates between two adjacent guide flanges, thereby allowing the sound-absorbing pad to be installed in the slot. The sound-absorbing pad can be made of sound-absorbing material, and the material of the sound-absorbing pad can be the same as or different from that of the guide member 201. Optionally, the material of the sound-absorbing pad includes, but is not limited to, wool felt, polyester fiber, foam material, two-component material, etc. Since the sound-absorbing pad is set inside the sound-absorbing pad mounting structure 202, there are no strength requirements for the sound-absorbing pad. Therefore, the sound-absorbing pad can use a two-component material with better sound absorption effect for mid-to-high frequencies, so that the sound radiated from all sides can be fully absorbed by the two-component material, further improving the sound absorption and noise reduction effect at the air inlet 101.

[0046] Among the operating noise of the range hood, the noise at the air outlet 102 is relatively high. Therefore, in achieving a noise reduction range hood, noise reduction treatment is also necessary at the air outlet 102. Specifically, the smoke collection chamber also has an air outlet 102, which is the outlet for exhausting cooking fumes. When the range hood is working, the fan transports the cooking fumes to the air outlet 102, and then exhausts them outdoors through the duct. Optionally, the air outlet 102 can be positioned opposite the air inlet 101, that is, the air outlet 102 is located at one end of the smoke collection chamber, and the air inlet 101 is located at the other end of the smoke collection chamber. Optionally, the position of the air outlet 102 can also be set according to the exhaust direction of the range hood fan.

[0047] In this embodiment of the application, the range hood also includes an exhaust assembly 3, which includes an exhaust hood 301, which is disposed at the exhaust port 102. Figure 4This is a schematic diagram of the structure of an air outlet shroud 301 provided in an embodiment of this application, as shown below. Figure 4 As shown, the exhaust hood 301 can be considered a connector, with one end connected to the exhaust port 102 and the other end connected to the flue pipe. The exhaust hood 301 can be tubular in shape, and an exhaust duct 302 is formed inside the exhaust hood 301 to allow oil fumes to pass through. To reduce noise at the exhaust port 102 of the range hood, a sound-absorbing structure 303 can be installed on the inner wall of the exhaust duct 302.

[0048] like Figure 4 As shown, the silencing structure 303 can be a baffle circumferentially arranged on the inner wall of the exhaust duct 302, and the baffle can form a certain angle with the inner wall of the exhaust duct 302. The baffle is inclined towards the air outlet 102. Similar to the principle of a gun silencer, the baffle can weaken the energy of the fumes, thereby achieving a noise reduction effect. Optionally, the baffle can be a series of annular baffles, or it can be continuously arranged in a spiral shape on the inner wall of the exhaust duct 302.

[0049] In the embodiments of this application, Figure 5 This is a schematic diagram of the structure of an exhaust component 3 provided in an embodiment of this application, as shown below. Figure 5 As shown, the exhaust assembly 3 may further include at least one noise reduction plate 304, which is disposed within the exhaust duct 302. The side of the noise reduction plate 304 is close to the inner wall of the exhaust duct 302. The noise reduction plate 304 can divide the exhaust duct into several airflow channels, thereby rectifying the oil fumes passing through the exhaust duct, ensuring that the discharged oil fumes are not disordered, thus reducing wind noise and improving the noise reduction effect. The number of noise reduction plates 304 can be one, two, or more. It should be noted that the number of noise reduction plates 304 should not be too large, so as not to affect the oil fume exhaust efficiency.

[0050] In this embodiment, the noise reduction plate 304 may also be provided with noise reduction micro-holes 307. The noise reduction micro-holes 307 have a good noise reduction effect on low-frequency noise below 1000Hz. The noise reduction micro-holes 307 are tiny through-holes opened on the noise reduction plate 304. These tiny through-holes can be regularly distributed or randomly distributed on the noise reduction plate 304. Optionally, these tiny through-holes can be arranged in a preset array on the noise reduction plate 304. Furthermore, the aperture and shape of these tiny through-holes can be the same or different.

[0051] It should be noted that the noise reduction micro-hole 307 can be disposed on any one of the noise reduction plates 304, or on each noise reduction plate 304.

[0052] As an optional implementation method, Figure 6This is a structural schematic diagram of a noise reduction plate 304 provided in an embodiment of this application, as shown below. Figure 6 As shown, at least one noise reduction plate 304 includes a first noise reduction plate 305 and a second noise reduction plate 306, which are cross-connected. The first noise reduction plate 305 and the second noise reduction plate 306 are at a preset angle. Optionally, the center positions of the first noise reduction plate 305 and the second noise reduction plate 306 intersect to form a cross-shaped plate. Optionally, the first noise reduction plate 305 is provided with noise reduction micropores 307.

[0053] like Figure 1 and Figure 5 As shown, when the exhaust assembly 3 is located at the air outlet 102 of the range hood, the position of the first noise reduction plate 305 within the air outlet hood 301 can be adjusted according to the range hood fan. Specifically, the range hood fan has a fan volute 4, and the air outlet direction of the range hood fan is tangent to the fan volute 4. To ensure that the noise reduction micro-holes 307 on the first noise reduction plate 305 can better perform their noise reduction function, the first noise reduction plate 305 can be parallel to the tangential plane of the fan volute 4. Since the first noise reduction plate 305 has noise reduction micro-holes 307, and the position of the first noise reduction plate 305 is precisely aligned with the tangential position of the airflow from the fan volute 4, the outgoing air can be subjected to noise reduction treatment through the micro-holes.

[0054] It should be noted that when the exhaust assembly 3 includes other noise reduction plates 304, there is a noise reduction plate 304 whose position in the air outlet hood 301 is the same as the setting position of the first noise reduction plate 305, and the noise reduction plate 304 is provided with noise reduction micro-holes 307.

[0055] In this embodiment, to achieve better noise reduction, the air outlet shroud 301 can be made of a sound-absorbing material. Optionally, the material of the air outlet shroud 301 includes, but is not limited to, sound-insulating felt, polyurethane foam, foamed rubber, PET long-fiber thermoplastic composite material, etc. The noise reduction panel 304 can also be made of a sound-absorbing material. Optionally, the material of the noise reduction panel 304 includes, but is not limited to, sound-insulating felt, polyurethane foam, foamed rubber, PET long-fiber thermoplastic composite material, etc. Optionally, the material of the noise reduction panel 304 can be the same as or different from the material of the air outlet shroud 301.

[0056] The noise-reducing range hood described in this application uses an inlet grille molded from PET long-fiber sound-absorbing material. A guide component 201 with a long flange is then installed in the air inlet, increasing the time for fumes to pass through the guide component 201, allowing for smoother and more orderly flow. Furthermore, the increased contact time with the sound-absorbing material enhances noise absorption. In addition, a dual-component material with good mid-to-high frequency sound absorption is installed between each guide component 201, ensuring that radiated sound is fully absorbed. This innovative improved inlet grille significantly reduces noise at the range hood inlet without increasing resistance or affecting fume extraction. Furthermore, this noise-reducing range hood uses PET long-fiber thermoplastic composite material to make the exhaust hood 301. This material has a large number of micropores, providing excellent sound absorption and noise reduction. It also has extremely low water absorption, high temperature resistance, flame retardancy, and excellent mechanical properties, including tear and impact resistance. Using this material in the exhaust hood 301 effectively reduces noise energy at the air outlet 102. The exhaust hood 301 has an internal annular fiber baffle; when air passes through it, some of the wind noise is absorbed by the fiber baffle. In addition, a noise-reducing plate 304 is added inside the exhaust hood 301 to rectify the airflow from the range hood fan, preventing chaotic airflow and further reducing wind noise. The noise-reducing plate 304 is made of PET long-fiber noise-reducing material and can be fixed inside the exhaust hood 301 with screws. The first noise reduction plate 305 is provided with noise reduction micropores 307. The position of the first noise reduction plate 305 is exactly aligned with the tangent position of the air blown out by the fan volute 4, so that the outgoing air can be treated by noise reduction micropores 307. By designing micropore noise reduction, fiber material absorption and other noise reduction methods in the exhaust component 3, a significant noise reduction effect can be achieved.

[0057] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, specific embodiments have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in a different order than that shown in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0058] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0059] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0060] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A noise-reducing range hood, characterized in that, Includes a range hood hood (1) and a grille assembly (2); A smoke collection chamber is formed inside the smoke hood (1), and the smoke collection chamber has an air inlet (101). A grille installation structure is provided at the air inlet (101). The grille assembly (2) includes at least one inlet grille, and at least one inlet grille is detachably connected to the grille mounting structure; The inlet grille is provided with air inlets at intervals, and the air inlets are provided with guide elements (201). The guide member (201) has a guide flange, which extends along the edge of the air inlet hole into the interior of the smoke collection chamber; A sound-absorbing pad mounting structure (202) is provided between adjacent flow-guiding flanges, and a sound-absorbing pad is provided inside the sound-absorbing pad mounting structure (202); The flow guide (201) is made of a thermoplastic composite material formed from polyethylene terephthalate long fibers. The inlet grille is made of a thermoplastic composite material formed from polyethylene terephthalate long fibers. The sound-absorbing pad mounting structure (202) is a slot structure. The slot structure utilizes the flow guide flange of the flow guide (201) to form two side walls, and is obtained by setting a pair of side plates between two adjacent flow guide flanges. The sound-absorbing pad is installed in the slot structure. The sound-absorbing pad is made of a two-component material.

2. The noise-reducing range hood according to claim 1, characterized in that, The flow guide (201) is made of sound-absorbing material. The flow guide (201) is made of the same material as the inlet grille, and the flow guide (201) and the inlet grille are integrally formed.

3. The noise-reducing range hood according to claim 1 or 2, characterized in that, The range hood also includes an exhaust assembly (3); The exhaust assembly (3) includes an exhaust hood (301); The smoke collection chamber also has an air outlet (102), and the air outlet cover (301) is disposed at the air outlet (102).

4. The noise-reducing range hood according to claim 3, characterized in that, An exhaust duct (302) is formed inside the exhaust hood (301), and a sound-absorbing structure (303) is provided on the side wall of the exhaust duct (302).

5. The noise-reducing range hood according to claim 4, characterized in that, The exhaust assembly (3) further includes at least one noise reduction plate (304), which is disposed inside the exhaust duct (302).

6. The noise-reducing range hood according to claim 5, characterized in that, At least one of the noise reduction plates (304) includes a first noise reduction plate (305) and a second noise reduction plate (306), the first noise reduction plate (305) and the second noise reduction plate (306) being cross-connected.

7. The noise-reducing range hood according to claim 6, characterized in that, The range hood also includes a fan volute (4), and the first noise reduction plate (305) is parallel to the tangential plane of the fan volute (4).

8. The noise-reducing range hood according to claim 7, characterized in that, The first noise reduction plate (305) is provided with noise reduction micropores (307).

9. The noise-reducing range hood according to claim 5, characterized in that, Both the air hood (301) and the noise reduction plate (304) are made of sound-absorbing material.

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