Noise reduction system and range hood

Abstract

The present invention provides a noise reduction system and range hood, which relate to the technical field of kitchen appliances. The system optimizes the structure of thin range hoods to a certain extent, improving their noise reduction and sound absorption capabilities. The noise reduction system, used in a range hood, comprises a first sound-absorbing component, a second sound-absorbing component, and a fan sound-absorbing component. The fan sound-absorbing component has a mounting portion, within which the fan assembly of the range hood is disposed. The first sound-absorbing component is disposed at the rear end of the fan sound-absorbing component, while the second sound-absorbing component is disposed opposite the first sound-absorbing component and connected to the smoke deflector of the range hood. The first, second, and fan sound-absorbing components enclose a sound-absorbing space.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a noise reduction system and a range hood. Background Art

[0002] Range hoods can solve the problem of oil smoke diffusion during cooking in the kitchen and have become one of the essential appliances in the home. However, with the development of range hoods, the demand for range hoods has gone beyond the ability to absorb oil smoke. Range hoods are also required to have lower noise and smaller space occupation.

[0003] Therefore, the current range hoods have gradually shifted from traditional side-suction range hoods to thin and light range hoods. However, since the thickness of thin and light range hoods is greatly reduced, the airflow flows rapidly in the narrow range hood space, causing the noise level to deteriorate sharply, which greatly affects the user experience.

[0004] Therefore, there is an urgent need to provide a noise reduction system and a range hood to solve the problems existing in the prior art to a certain extent. Summary of the Invention

[0005] The object of the present invention is to provide a noise reduction system and a range hood, so as to optimize the structure of a thin range hood to a certain extent and enhance the noise reduction and sound absorption capability of the range hood.

[0006] The present invention provides a noise reduction system for a range hood, comprising a first sound absorbing component, a second sound absorbing component and a fan sound absorbing component; the fan sound absorbing component is formed with a mounting portion, and the fan component of the range hood is arranged in the mounting portion; the first sound absorbing component is arranged at the rear end of the fan sound absorbing component, the second sound absorbing component is arranged relative to the first sound absorbing component and is connected to the smoke guide plate of the range hood, and the first sound absorbing component, the second sound absorbing component and the fan sound absorbing component enclose a sound absorbing space.

[0007] Among them, the first sound absorbing component includes a range hood rear panel and a first sound absorbing member; a accommodating portion is formed on the range hood rear panel, the first sound absorbing member is arranged in the accommodating portion, and the side of the first sound absorbing member facing away from the accommodating portion is in contact with the fan sound absorbing component.

[0008] Specifically, a positioning protrusion is formed in the accommodating portion, and a positioning hole is formed on the first sound absorbing member corresponding to the positioning protrusion.

[0009] Specifically, a fixing piece is provided between the first sound absorbing piece and the fan sound absorbing assembly, and the fixing piece is arranged corresponding to the avoidance hole of the fan sound absorbing assembly.

[0010] Furthermore, the first sound absorbing assembly also includes a first cover plate and a second cover plate, and a plurality of first sound absorbing perforations are formed on the first cover plate and the second cover plate. The first cover plate and the second cover plate are arranged on the first sound absorbing member and are located on both sides of the fixing member.

[0011] Among them, the fan sound-absorbing component includes a volute body and an air duct rear plate; the volute body is annular and forms an air duct, the air duct rear plate is covered on the side of the volute body facing the first sound-absorbing component, and the air duct rear plate and the volute body constitute the mounting part; a plurality of second sound-absorbing perforations are distributed on the volute body and the air duct rear plate.

[0012] Specifically, the volute body includes a volute, a first enclosure and a second enclosure; the first enclosure and the second enclosure are relatively arranged on both sides of the volute, and a second sound absorbing member is provided between the first enclosure and the second enclosure.

[0013] Compared with the prior art, the noise reduction system provided by the present invention has the following advantages:

[0014] The noise reduction system provided by the present invention is used for a range hood, and includes a first sound absorbing component, a second sound absorbing component and a fan sound absorbing component; the fan sound absorbing component is formed with a mounting portion, and the fan component of the range hood is arranged in the mounting portion; the first sound absorbing component is arranged at the rear end of the fan sound absorbing component, the second sound absorbing component is arranged relative to the first sound absorbing component and is connected to the smoke guide plate of the range hood, and the first sound absorbing component, the second sound absorbing component and the fan sound absorbing component are enclosed to form a sound absorbing space.

[0015] From this analysis, it can be seen that after the fan assembly is started, air enters the range hood through the smoke inlet of the range hood. Therefore, the present application connects the second sound-absorbing assembly to the smoke guide plate, and the first sound-absorbing assembly is arranged at the rear end of the fan assembly, so that the noise can be radiated only through the smoke inlet. In addition, by arranging the fan sound-absorbing assembly in the first sound-absorbing assembly and the second sound-absorbing assembly, a sound-absorbing space can be enclosed and formed.

[0016] The noise radiated from the smoke inlet is partially absorbed by the second sound-absorbing component, while a portion is reflected back toward the first sound-absorbing component. This multiple absorption and reflection by the first and second sound-absorbing components can reduce the noise transmission of the entire range hood to a certain extent.

[0017] In addition, the present application further utilizes the reflection phenomenon of sound. By forming a mounting portion of the fan sound-absorbing component and arranging the fan component in the mounting portion, the noise diffused to both sides can be continuously reflected and absorbed, thereby further reducing noise transmission and improving the noise absorption capacity of the noise reduction structure.

[0018] In addition, the present invention also provides a range hood, comprising a shell, the fan assembly, an electrical box and the above-mentioned noise reduction system; a smoke inlet is formed on one side of the shell, and an air outlet is formed on the other side; the noise reduction system is arranged in the shell, the fan assembly is arranged in the sound absorption space of the noise reduction system, and the air outlet of the fan assembly is arranged corresponding to the air outlet of the shell; the electrical box is arranged on one side of the shell, and is located at a position of the shell away from the smoke inlet.

[0019] In which, a smoke guide plate is provided at the position of the shell corresponding to the smoke inlet, and the smoke guide plate is rotatably connected to the shell, and the second sound absorbing component is connected to the smoke guide plate; a pushing component is provided on the side of the shell, and one end of the pushing component is connected to the smoke guide plate.

[0020] Specifically, it also includes an air outlet seat, in which an air guide duct is formed. The air guide duct extends along the air outlet direction of the air duct of the fan sound absorbing assembly.

[0021] The range hood provided in this application, by disposing a noise reduction system within the housing, can confine the noise generated by the smoke inlet within the resulting sound-absorbing space, thereby achieving a noise reduction effect through continuous reflection and absorption of the noise. By locating the electrical box on the side of the housing, away from the smoke inlet, it is possible to control the fan assembly and other structures of the range hood while also making full use of the space within the housing without occupying the sound-absorbing space formed by the noise reduction system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic structural diagram of a noise reduction system from a first perspective provided by an embodiment of the present invention;

[0024] Figure 2 An exploded view of a first sound absorbing component from a first perspective in a noise reduction system provided by an embodiment of the present invention;

[0025] Figure 3 An exploded view of a first sound absorbing component in a noise reduction system provided by an embodiment of the present invention from a second perspective;

[0026] Figure 4 A schematic structural diagram of a first sound absorbing component and a fan sound absorbing component in a noise reduction system provided in an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the overall structure of a range hood provided by an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of the internal structure of the range hood provided by an embodiment of the present invention from a third perspective.

[0029] In the figure: 1-first sound absorbing component; 101-hood rear panel; 1011-accommodation portion; 1012-positioning protrusion; 102-first sound absorbing member; 1021-positioning hole; 103-fixing member; 1031-hollow hole; 104-first cover plate; 1041-first sound absorbing perforation; 105-second cover plate; 2-second sound absorbing component; 3-fan sound absorbing component; 301-volute body; 3011 -air duct; 3012-volute; 3013-first enclosure; 3014-second enclosure; 3015-second sound-absorbing member; 302-air duct rear panel; 3021-second sound-absorbing perforation; 3022-avoidance hole; 303-installation portion; 4-housing; 401-smoke inlet; 402-air outlet; 403-smoke guide plate; 5-fan assembly; 6-electrical box; 7-propelling assembly; 8-air outlet seat. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The structures of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is claimed, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0031] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0033] In the description of the embodiments of the present application, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0035] For ease of description, spatially relative terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as illustrated in the drawings. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings.

[0036] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0037] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0038] The features of the examples described herein may be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have various configurations, other configurations are possible, as will be apparent upon understanding the disclosure of this application. In addition, the technical solutions between the various embodiments may be combined with each other, but this must be based on the ability of a person of ordinary skill in the art to implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0039] like Figure 1 As shown, the present invention provides a noise reduction system for a range hood, comprising a first sound absorbing component 1, a second sound absorbing component 2 and a fan sound absorbing component 3; the fan sound absorbing component 3 is formed with a mounting portion 303, and the fan component 5 of the range hood is arranged in the mounting portion 303; the first sound absorbing component 1 is arranged at the rear end of the fan sound absorbing component 3, the second sound absorbing component 2 is arranged relative to the first sound absorbing component 1, and is connected to the smoke guide plate 403 of the range hood, and the first sound absorbing component 1, the second sound absorbing component 2 and the fan sound absorbing component 3 enclose a sound absorbing space.

[0040] Compared with the prior art, the noise reduction system provided by the present invention has the following advantages:

[0041] The noise reduction system provided by the present invention is such that after the fan assembly 5 is started, air enters the range hood through the smoke inlet 401 of the range hood. Therefore, the present application connects the second sound-absorbing assembly 2 with the smoke guide plate 403, and the first sound-absorbing assembly 1 is arranged at the rear end of the fan assembly 5, so that the noise can be radiated only through the smoke inlet 401. In addition, by arranging the fan sound-absorbing assembly 3 in the first sound-absorbing assembly 1 and the second sound-absorbing assembly 2, a sound-absorbing space can be enclosed and formed.

[0042] The noise radiated from the smoke inlet 401 is partially absorbed by the second sound-absorbing assembly 2, and partially reflected toward the first sound-absorbing assembly 1. The noise reflected toward the first sound-absorbing assembly 1 is partially absorbed by the first sound-absorbing assembly 1, and partially reflected again toward the second sound-absorbing assembly 2. This multiple absorption and reflection by the first and second sound-absorbing assemblies 1 and 2 can reduce the noise transmission of the entire range hood to a certain extent.

[0043] In addition, the present application further utilizes the reflection phenomenon of sound. By forming the fan sound-absorbing component 3 into a mounting portion 303 and arranging the fan component 5 in the mounting portion 303, the noise diffused to both sides can be continuously reflected and absorbed, thereby further reducing noise transmission and improving the noise absorption capacity of the noise reduction structure.

[0044] It should be noted that, because sound reflects better in narrow or smaller spaces, the noise reduction system in this application is primarily intended for use in thin side-mounted smoke hoods, and the noise reduction system provided herein and these thin side-mounted smoke hoods are essentially interdependent. If the hood is too thick, sound will diverge during transmission, preventing multiple reflections. Therefore, by installing a first sound-absorbing component 1, a second sound-absorbing component 2, and a fan sound-absorbing component 3 within a thin side-mounted smoke hood, a sound-absorbing space is formed. This confines noise within the sound-absorbing space, and through continuous reflection and absorption, noise absorption and noise reduction are achieved within the smoke hood.

[0045] Therefore, the thin side-smoking smoker provides a basis for realizing the function of the noise reduction system provided by the present application, and the noise reduction system provided by the present application can also reduce the thickness of the side-smoking smoker, making it a thin side-smoking smoker.

[0046] It should be noted that the second sound-absorbing assembly 2 (not shown) in this application includes a perforated plate and sound-absorbing cotton. The size and shape of the perforated plate and the sound-absorbing cotton match the shape and size of the smoke guide plate 403, and the perforated plate presses the sound-absorbing cotton onto the inner wall of the smoke guide plate 403. The perforated plate and the sound-absorbing cotton enhance the sound-absorbing and noise-reducing capabilities of the second sound-absorbing assembly 2. Furthermore, since the second sound-absorbing assembly 2 is connected to the smoke guide plate 403, the perforated plate covering the sound-absorbing cotton can reduce, to a certain extent, the contamination of the sound-absorbing cotton by cooking fumes.

[0047] Among them, Figure 2 Combine Figure 3 As shown, the first sound absorbing component 1 in the present application includes a range hood rear panel 101 and a first sound absorbing member 102; a receiving portion 1011 is formed on the range hood rear panel 101, the first sound absorbing member 102 is arranged in the receiving portion 1011, and the side of the first sound absorbing member 102 facing away from the receiving portion 1011 is in contact with the fan sound absorbing component 3.

[0048] In the present application, the accommodating portion 1011 on the rear panel 101 of the range hood is formed by embossing, and the accommodating portion 1011 is formed in a direction away from the fan sound-absorbing component 3. The first sound-absorbing component 102 is a whole piece of sound-absorbing cotton whose shape and size are adapted to the accommodating portion 1011, thereby enhancing the sound-absorbing ability of the first suction component.

[0049] Since the current range hoods are all wall-mounted, Figure 3 As shown, the edge of the range hood rear plate 101 in this application is formed with multiple range hood hanging angles, and based on Figure 3 From the perspective of , the range hood hanging angle and the accommodating portion 1011 are both raised, and the raised directions of the range hood hanging angle and the accommodating portion 1011 are the same, and the raised size of the accommodating portion 1011 is not larger than the raised size of the range hood hanging angle, thereby avoiding the accommodating portion 1011 affecting the flatness of the overall hanging of the range hood.

[0050] Preferably, if Figure 2 Combine Figure 3 As shown, since the first sound-absorbing member 102 in the present application is sound-absorbing cotton, and the sound-absorbing cotton is in contact with the air duct rear plate 302 after assembly, when the fan assembly 5 is started, the sound-absorbing cotton is easily affected by the suction force of the fan assembly 5 and moves.

[0051] In the present application, a positioning protrusion 1012 is formed in the accommodating portion 1011, and a positioning hole 1021 is formed on the first sound absorbing member 102 corresponding to the positioning protrusion 1012. By inserting the positioning protrusion 1012 into the positioning hole 1021, the first sound absorbing member 102 can be positioned. Therefore, after assembly, the first sound absorbing member 102 can be prevented from moving to a certain extent, which would reduce the sound absorption effect and even affect the operation of the fan assembly 5.

[0052] It should be noted here that the positioning protrusion 1012 in the present application is formed by embossing. First, the accommodating portion 1011 is embossed on the side of the range hood rear panel 101 facing the fan sound absorbing component 3, and then the positioning protrusion 1012 is embossed on the side of the accommodating portion 1011 facing away from the fan sound absorbing component 3.

[0053] Preferably, based on Figure 2 From the perspective of perspective, the size of the positioning protrusion 1012 in the present application is consistent with the depth of the accommodating portion 1011, and the thickness of the first sound-absorbing component 102 is consistent with the depth of the accommodating portion 1011. Therefore, when the first sound-absorbing component 102 is installed in the accommodating portion 1011, it can ensure to a certain extent that the side of the range hood rear plate 101 facing the fan sound-absorbing component 3 and the side of the first sound-absorbing component 102 facing the fan sound-absorbing component 3 form a flat contact plane, thereby improving the fit between the first suction component and the fan sound-absorbing component 3, avoiding obstruction of the airflow, and ensuring the sound absorption effect.

[0054] Since the first sound absorbing member 102 in this application is made of sound absorbing cotton, when the fan assembly 5 is started, the stability of the sound absorbing cotton will be affected to a certain extent. Figure 2 Combine Figure 4 As shown, the present application provides a fixing member 103 between the first sound absorbing member 102 and the fan sound absorbing assembly 3, and the fixing member 103 is arranged corresponding to the avoidance hole 3022 of the fan sound absorbing assembly 3, which can improve the stability of the position of the sound absorbing cotton corresponding to the fan assembly 5.

[0055] That is, the fixing member 103 in the present application is fixedly connected to the sound-absorbing cotton. The fixing member 103 can, to a certain extent, prevent the fan assembly 5 from sucking the sound-absorbing cotton into the fan, causing damage to the fan.

[0056] It should be noted that the fixing member 103 in the present application is formed with a plurality of hollow holes 1031, which are distributed along the circumference of the fixing member 103. The hollow holes 1031 can reduce the overall weight of the fixing member 103 on the one hand, and reduce the obstruction to the air flow on the other hand. Figure 2 Combine Figure 4As shown, the first sound absorbing assembly 1 in the present application further includes a first cover plate 104 and a second cover plate 105 , and a plurality of first sound absorbing perforations 1041 are formed on the first cover plate 104 and the second cover plate 105 . The first cover plate 104 and the second cover plate 105 are arranged on the first sound absorbing member 102 and are located on both sides of the fixing member 103 .

[0057] On the one hand, the first cover plate 104 and the second cover plate 105 provided on either side of the fixing member 103 can further isolate the sound-absorbing cotton from the air duct rear plate 302, thereby further improving the stability of the sound-absorbing cotton and reducing the risk of being sucked into the fan assembly 5. On the other hand, since a plurality of first suction perforations are distributed on each of the first cover plate 104 and the second cover plate 105, a certain degree of sound absorption and noise reduction can be achieved through the first cover plate 104 and the second cover plate 105, thereby improving the sound absorption and noise reduction capabilities of the overall structure.

[0058] Among them, Figure 2-Figure 4 As shown, the fan sound-absorbing assembly 3 in the present application includes a volute body 301 and an air duct rear plate 302; the volute body 301 is annular and forms an air duct 3011, the air duct rear plate 302 is covered on the side of the volute body 301 facing the first sound-absorbing assembly 1, and the air duct rear plate 302 and the volute body 301 form a mounting portion 303; a plurality of second sound-absorbing perforations 3021 are distributed on the volute body 301 and the air duct rear plate 302.

[0059] like Figure 2-Figure 4 As shown, a plurality of second sound-absorbing perforations 3021 are distributed on the air duct rear plate 302 and the volute body 301 in the present application. Since the volute body 301 is annular and forms an air duct 3011 and a mounting portion 303, the second sound-absorbing perforations 3021 can absorb the noise in the air duct 3011 to a certain extent, and can also absorb the noise generated by the fan assembly 5 to a certain extent after the fan assembly 5 is installed in the mounting portion 303.

[0060] like Figure 1 As shown, the fan sound absorbing component 3 can absorb and reflect the noise that spreads to the left and right sides, while the first sound absorbing component 1 and the second sound absorbing component 2 can absorb and reflect the noise that spreads to the front and rear sides.

[0061] Preferably, if Figure 4 As shown, the volute body 301 in the present application includes a volute 3012, a first enclosure 3013 and a second enclosure 3014; the first enclosure 3013 and the second enclosure 3014 are relatively arranged on both sides of the volute 3012, and a second sound absorbing member 3015 is provided between the first enclosure 3013 and the second enclosure 3014.

[0062] The second sound-absorbing member 3015 in this application is also made of sound-absorbing cotton. This allows the first and second panels 3013 and 3014 to stably position the sound-absorbing cotton on both sides of the volute 3012. This placement of sound-absorbing cotton further enhances the sound-absorbing and noise-reducing capabilities of the fan sound-absorbing assembly 3. Therefore, the noise reduction system provided in this application, with the first sound-absorbing assembly 1, the second sound-absorbing assembly 2, and the fan sound-absorbing assembly 3 forming a sound-absorbing space, can maximize the absorption and reduction of noise generated by the range hood's air duct 3011 and the fan assembly 5.

[0063] In addition, if Figure 5 Combine Figure 6 As shown, the present application also provides a range hood, comprising a shell 4, a fan assembly 5, an electrical box 6 and the above-mentioned noise reduction system; a smoke inlet 401 is formed on one side of the shell 4, and an air outlet 402 is formed on the other side; the noise reduction system is arranged in the shell 4, the fan assembly 5 is arranged in the sound-absorbing space of the noise reduction system, and the air outlet 402 of the fan assembly 5 is arranged corresponding to the air outlet 402 of the shell 4; the electrical box 6 is arranged on one side of the shell 4, and is located at a position of the shell 4 away from the smoke inlet 401.

[0064] The range hood provided herein, by disposing a noise reduction system within the housing 4, can confine the noise generated by the smoke inlet 401 within the sound-absorbing space formed, thereby achieving a noise reduction effect through continuous reflection and absorption of the noise. By disposing the electrical box 6 on the side of the housing 4, away from the smoke inlet 401, it is possible to control the fan assembly 5 and other structures of the range hood while also making full use of the space within the housing 4 without occupying the sound-absorbing space formed by the noise reduction system.

[0065] Among them, Figure 5 Combine Figure 6 As shown, a smoke guide plate 403 is provided at the position of the shell 4 corresponding to the smoke inlet 401, and the smoke guide plate 403 is rotatably connected to the shell 4, and the second sound absorbing component 2 is connected to the smoke guide plate 403; a pushing component 7 is provided on the side inside the shell 4, and one end of the pushing component 7 is connected to the smoke guide plate 403.

[0066] The pushing component 7 in this application is an electric push rod. By setting the pushing component 7 on one side of the shell 4, and the pushing component 7 and the electrical box 6 in this application are respectively located on both sides of the shell 4, the space inside the shell 4 can be maximized, and the electric push rod can be set to realize the automatic opening and closing of the smoke guide plate 403 to the smoke inlet 401.

[0067] Specifically, if Figure 4 Combine Figure 5 As shown, the range hood provided by the present invention further includes an air outlet seat 8 , in which an air guide duct is formed. The air guide duct extends along the air outlet direction of the air duct 3011 of the fan sound absorbing component 3 .

[0068] In order to ensure that the air flow can flow smoothly, the air guide duct formed in the air outlet seat 8 in the present application extends along the air outlet direction of the air duct 3011 of the fan sound absorbing component 3, that is, Figure 4 Combine Figure 5 As shown, the two sides of the air outlet seat 8 in the present application are further extended along the contour direction of the air outlet 402 of the volute 3012 to form an inclined structure, thereby reducing the obstruction to the airflow, making the airflow flow smoother, reducing wind resistance, and thus reducing the generation of noise to a certain extent.

[0069] Preferably, the height of the air outlet seat 8 in this application is no less than 1.5 times the width of the air outlet 402 of the volute 3012, and is greater than the outlet width of the air outlet seat 8, and further greater than the thickness of the range hood. The heightened air outlet seat 8 allows the airflow to flow fully and evenly within the air duct, thereby reducing flow unevenness and further reducing airflow noise.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A noise reduction system for a thin range hood, characterized in that: It includes a first sound absorbing component, a second sound absorbing component and a fan sound absorbing component; The fan sound absorbing assembly is formed with a mounting portion, and the fan assembly of the range hood is arranged in the mounting portion; The first sound absorbing component is arranged at the rear end of the fan sound absorbing component, the second sound absorbing component is arranged opposite to the first sound absorbing component and is connected to the smoke guide plate of the range hood, and the first sound absorbing component, the second sound absorbing component and the fan sound absorbing component enclose a sound absorbing space; The first sound absorbing assembly includes a first sound absorbing member, a first cover plate and a second cover plate; A fixing member is provided between the first sound absorbing member and the fan sound absorbing assembly, and the fixing member is provided corresponding to the avoidance hole of the fan sound absorbing assembly; A plurality of first sound-absorbing perforations are formed on the first cover plate and the second cover plate. The first cover plate and the second cover plate are arranged on the first sound-absorbing member and are located on both sides of the fixing member.

2. The noise reduction system according to claim 1, characterized in that The first sound absorbing component includes a range hood rear panel; A receiving portion is formed on the rear plate of the range hood, the first sound absorbing member is arranged in the receiving portion, and a side of the first sound absorbing member facing away from the receiving portion is in contact with the fan sound absorbing assembly.

3. The noise reduction system according to claim 2, characterized in that A positioning protrusion is formed in the accommodating portion, and a positioning hole is formed on the first sound absorbing member corresponding to the positioning protrusion.

4. The noise reduction system according to claim 1, wherein: The fan sound absorbing assembly includes a volute body and an air duct rear plate; The volute body is annular and is formed with an air duct. The air duct rear plate is provided on a side of the volute body facing the first sound absorbing assembly. The air duct rear plate and the volute body constitute the mounting portion. A plurality of second sound-absorbing perforations are distributed on the volute body and the air duct rear plate.

5. The noise reduction system according to claim 4, characterized in that: The volute body includes a volute, a first enclosure and a second enclosure; The first enclosing plate and the second enclosing plate are arranged on two sides of the volute opposite to each other, and a second sound absorbing member is provided between the first enclosing plate and the second enclosing plate.

6. A range hood, characterized in that: It comprises a housing, the fan assembly, an electrical box and the noise reduction system according to any one of claims 1 to 5; A smoke inlet is formed on one side of the shell, and an air outlet is formed on the other side. The noise reduction system is arranged in the shell, and the fan assembly is arranged in the sound absorption space of the noise reduction system, and the air outlet of the fan assembly is arranged corresponding to the air outlet of the shell; The electrical box is arranged on one side of the shell and is located at a position of the shell away from the smoke inlet.

7. The range hood according to claim 6, characterized in that: The housing is provided with a smoke guide plate at a position corresponding to the smoke inlet, and the smoke guide plate is rotatably connected to the housing, and the second sound absorbing component is connected to the smoke guide plate; A pushing component is provided on the side of the shell, and one end of the pushing component is connected to the smoke guide plate.

8. The range hood according to claim 6, characterized in that: It also includes an air outlet seat, in which an air guide duct is formed. The air guide duct extends along the air outlet direction of the air duct of the fan sound absorbing component.

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