A type of range hood

Abstract

This application provides a range hood, including a frame assembly, a smoke collection assembly, and a silencer assembly. The frame assembly has a smoke exhaust duct and includes at least a fan disposed within the smoke exhaust duct. The smoke collection assembly is connected to the frame assembly and has a smoke collection chamber communicating with the smoke exhaust duct. The silencer assembly is connected to the smoke collection assembly, disposed within the smoke collection chamber, and forms at least one silencer chamber. The silencer chamber is used to reduce the noise generated by the range hood. As a semi-enclosed cavity, the noise entering the silencer chamber is difficult to radiate back into the smoke exhaust duct. Furthermore, the noise entering the silencer chamber is repeatedly reflected within the silencer chamber, and the noise continuously weakens during the reflection process. The presence of the silencer chamber can reduce the noise generated by the range hood, thereby reducing the overall noise level of the range hood.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliances, specifically to a range hood. Background Technology

[0002] Range hoods are an essential kitchen appliance in modern homes. They operate on the principles of fluid dynamics, using a fan installed inside to draw in and exhaust cooking fumes. However, excessive noise generated by the fan during operation can make a range hood quite noisy. Summary of the Invention

[0003] To address the above technical problems, this invention provides a range hood that can reduce the noise emitted during operation, thereby reducing the overall noise level of the range hood.

[0004] An embodiment of this application provides a range hood, including a frame assembly, a smoke collection assembly, and a silencer assembly. The frame assembly has a smoke exhaust duct and includes at least a fan disposed within the smoke exhaust duct. The smoke collection assembly is connected to the frame assembly and has a smoke collection chamber communicating with the smoke exhaust duct. The silencer assembly is disposed within the smoke collection chamber and connected to the smoke collection assembly. The silencer assembly is disposed within the smoke collection chamber and forms at least one silencer chamber, which is used to reduce the noise generated by the range hood.

[0005] Furthermore, the silencing component itself forms a silencing cavity; or, the silencing component and the smoke collection component together form a silencing cavity.

[0006] Furthermore, each silencing chamber includes at least two independent silencing sub-silencing chambers.

[0007] Furthermore, the smoke collection assembly includes a first smoke collection hood, which is connected to the frame assembly and has a first smoke extraction duct communicating with the smoke exhaust duct. The smoke collection chamber includes at least the first smoke extraction duct. The silencing assembly includes at least one first silencing member, which is connected to the inner wall of the first smoke collection hood and forms a first silencing chamber with the inner wall of the first smoke collection hood. The first silencing chamber has a sound inlet communicating with the first smoke extraction duct. The silencing chamber includes at least the first silencing chamber.

[0008] Furthermore, the number of first silencers is at least two, and at least part of the first smoke duct is constructed by two oppositely arranged first silencers to guide the smoke flow in the first smoke duct to the exhaust duct.

[0009] Furthermore, the first smoke hood has a first smoke inlet, which is connected to a first smoke duct, and the smoke flowing from the first smoke inlet into the first smoke duct flows through the sound inlet.

[0010] Furthermore, the first smoke hood includes a top shell, a back shell, a front shell, and two opposing side shells, each side shell having at least one first silencing component; the top shell is connected to the two side shells and the frame assembly, and has a smoke exhaust port; the back shell is connected to the two side shells and the top shell; the front shell is connected to the two side shells and the top shell, and is opposite to the back shell, and has a first smoke inlet communicating with the first smoke exhaust duct. A first silencing cavity is constructed from at least one first silencing component, one side shell, the top shell, the back shell, and the front shell, with the first silencing component spaced apart from the top shell to form a sound inlet.

[0011] Furthermore, the side shell includes two oppositely arranged outer side plates and two oppositely arranged inner side plates. The two oppositely arranged outer side plates are connected to the top shell, back shell, and front shell. The two oppositely arranged inner side plates are connected to the back shell and front shell, and the two inner side plates are disposed between the two outer side plates. The inner side plates are spaced apart from the adjacent outer side plates. The first silencing component is connected to the inner side plates. A first silencing cavity is constructed from at least a first silencing component, an inner side plate, an outer side plate, a top shell, a back shell, and a front shell.

[0012] Furthermore, the first smoke hood includes a first duct shell and a second duct shell. The first duct shell has a first sub-duct. The second duct shell is connected to the frame assembly and is slidably connected to the first duct shell along the height direction of the range hood. It has a second sub-duct and an exhaust port. The second sub-duct connects the exhaust port and the first sub-duct. The first smoke extraction duct includes the first sub-duct and the second sub-duct. At least one first silencer is disposed on the inner wall of the first duct shell. Each first silencer cavity is formed by at least the first silencer, the inner wall of the first duct shell, and the inner wall of the second duct shell.

[0013] Furthermore, the silencing assembly also includes at least one second silencing element disposed on the inner wall of the first air duct shell. During the sliding process of the first air duct shell relative to the second air duct shell, there is at least one open position. In the open position, each first silencing cavity is constructed by the first silencing element, the inner wall of the first air duct shell, the inner wall of the second air duct shell, and the second silencing element, and an inlet communicating with the first silencing cavity is formed between the first silencing element and the second silencing element.

[0014] Furthermore, during the sliding process of the first air duct shell relative to the second air duct shell, there is also a stacking position where the end of the first silencing component away from the first air duct shell and the end of the second silencing component away from the second air duct shell are stacked together.

[0015] Furthermore, the first silencing component has a first fixed end and a first free end, the first fixed end being connected to the inner wall of the first air duct shell; the second silencing component has a second fixed end and a second free end, the second fixed end being connected to the inner wall of the second air duct shell; wherein, for the first silencing component and the second silencing component that form the same first silencing cavity, when the first air duct shell is in the stacked position, the second free end is farther away from the corresponding first silencing cavity than the first free end.

[0016] Furthermore, when the first air duct shell is in the stacked position, for the first silencing component and the second silencing component that form the same first silencing cavity, the minimum distance between the first free end and the corresponding second free end is greater than or equal to 5mm.

[0017] Furthermore, the first smoke collection hood is a side-suction or top-suction hood. When the first smoke collection hood is a side-suction hood, the smoke collection assembly also includes a second smoke collection hood. The second smoke collection hood is connected to the first smoke collection hood and has a second smoke exhaust duct that communicates with the exhaust duct. The silencing assembly also includes a third silencing component. The third silencing component is disposed in the second smoke exhaust duct and forms a second silencing cavity by itself or by forming a second silencing cavity with the inner wall of the second smoke collection hood. The silencing cavity also includes a second silencing cavity.

[0018] Furthermore, the first silencing component includes a rectifier plate, sound-absorbing cotton, and a protective cover. The rectifier plate has multiple spaced sound-absorbing holes. The sound-absorbing cotton covers at least the sound-absorbing holes. The protective cover is pressed against the sound-absorbing cotton and fixedly connected to the rectifier plate. The rectifier plate is fixedly connected to the inner wall of the smoke collection assembly, or the protective cover is fixedly disposed between the rectifier plate and the inner wall of the smoke collection assembly.

[0019] Furthermore, the range hood also includes a sound-absorbing component, which is disposed inside the silencing cavity and is fixedly connected to the inner wall of the smoke collection component and / or the silencing component.

[0020] Furthermore, the silencing cavity has a sound inlet for communicating with the smoke exhaust duct, and the sound absorption component is positioned directly opposite the sound inlet.

[0021] This application provides a range hood, including a frame assembly, a smoke collection assembly, and a silencer assembly. The frame assembly has a smoke exhaust duct. The smoke collection assembly is connected to the frame assembly and has a smoke collection chamber communicating with the smoke exhaust duct. The silencer assembly is connected to the smoke collection assembly and is disposed within the smoke collection chamber, forming at least one silencer chamber. The silencer chamber is used to reduce the noise generated by the range hood. As a semi-enclosed cavity, the noise entering the silencer chamber is difficult to radiate back into the smoke exhaust duct. Furthermore, the noise entering the silencer chamber is repeatedly reflected inside the silencer chamber, and the noise continuously weakens during the reflection process. The silencer chamber can reduce the noise of the range hood during operation, thereby reducing the overall noise of the range hood. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a range hood according to one embodiment of this application;

[0024] Figure 2 This is a cross-sectional structural diagram of a range hood in one embodiment of this application;

[0025] Figure 3 This is a cross-sectional structural schematic diagram of a range hood in one embodiment of this application from another perspective;

[0026] Figure 4 This is a cross-sectional view of the first duct housing of a range hood in one embodiment of this application, with the duct open.

[0027] Figure 5 This is a cross-sectional view of the first duct housing of a range hood in one embodiment of the present application, showing the stacked structure.

[0028] Figure 6 This is a cross-sectional view of a range hood according to another embodiment of this application;

[0029] Figure 7 for Figure 5 Enlarged structural diagram at point C;

[0030] Figure 8 This is a schematic diagram of the structure of a range hood according to another embodiment of this application;

[0031] Figure 9 This is a cross-sectional structural schematic diagram of a range hood in another embodiment of this application;

[0032] Figure 10 This is a schematic diagram of the exploded structure of the first silencer in one embodiment of this application.

[0033] Explanation of icon numbers:

[0034]

[0035] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0038] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0041] In related technologies, range hoods utilize a fan installed inside the hood to exhaust and absorb cooking fumes during operation. As the fan blades rotate, they generate negative pressure, drawing fumes from below or to the sides of the hood into the duct and then expelling them outdoors. Range hoods generate noise during operation, primarily categorized as aerodynamic, mechanical, and electromagnetic noise. Aerodynamic noise includes noise generated by the pulsation of surrounding air caused by the impeller's rotation and noise from eddies in the fluid flow path. Mechanical noise includes noise from the vibration of structures such as the fan. Electromagnetic noise includes noise from the vibration of electrical components caused by the pulsation of the magnetic field within the motor. The main sources of noise in range hoods are directional radiated noise downwards from the frame assembly and reverberant noise radiated directionally from the smoke collection chamber. These various types of noise refract and reverberate within the duct, propagating away from the fan and through the smoke extraction openings into the kitchen, resulting in excessive noise levels.

[0042] To solve the problem of excessive noise from range hoods, please refer to... Figures 1 to 3 This application provides a range hood 1, including a frame assembly 10, a smoke collection assembly 20, and a noise reduction assembly 30. The smoke collection assembly 20 has a smoke collection chamber 21, within which noise emitted by the range hood 1 propagates. In this embodiment, the range hood 1 reduces the noise emitted by the range hood 1 during operation by placing the noise reduction assembly 30 within the smoke collection chamber 21 and constructing at least one noise reduction chamber 40. The noise reduction chamber 40 absorbs at least a portion of the noise generated by the range hood 1 (such as mechanical noise, aerodynamic noise, and electromagnetic noise).

[0043] The frame assembly 10 serves as the power component in the range hood 1, generating negative pressure suction to draw fumes from below or to the side of the range hood 1 into the smoke collection assembly 20. The frame assembly 10 has an exhaust duct 11 and includes at least a fan (not shown in the figure) installed within the exhaust duct 11. The fan includes components such as a volute, impeller, motor, and air inlet ring. When fumes enter the smoke collection assembly 20, they are drawn into the exhaust duct 11 by the negative pressure suction of the fan and discharged outdoors or into a smoke exhaust pipe.

[0044] It is understood that the frame assembly 10 can be composed of components such as a fan, corrugated pipe, and housing, and the exhaust duct 11 can be formed by the space between the fan and the housing. The fan has at least one air intake and one air exhaust. The exhaust air exhaust can be connected to the outside or the exhaust duct via the corrugated pipe to promptly discharge the smoke in the exhaust duct 11 to the outside or the exhaust duct. This embodiment does not limit the specific type of fan. For example, the fan can be an axial flow fan, which has a smaller usable space and is conducive to the miniaturization of the frame assembly 10; or, the fan can be a centrifugal fan, which can change the airflow direction of the duct and has a better suction effect, thereby enabling the range hood 1 to have a better absorption effect on oil fumes. This embodiment also does not limit the number of air intakes of the fan. The number of air intakes can be one or more to enhance the absorption effect of the range hood 1 on oil fumes.

[0045] The smoke collection assembly 20, as a smoke collection component in the range hood 1, is used to contain the smoke drawn in by the frame assembly 10. The smoke collection assembly 20 has a smoke collection chamber 21 that communicates with the exhaust duct 11. It is understood that the negative pressure suction generated by the frame assembly 10 is transmitted to the smoke collection chamber 21 via the exhaust duct 11, causing the smoke to be drawn into the smoke collection chamber 21 and flow into the exhaust duct 11 under the action of the frame assembly 10. The smoke collection assembly 20 is connected to the frame assembly 10, and the connection method includes, but is not limited to, at least one of screwing, snap-fitting, and welding, so that the range hood 1 has high structural strength, thereby enabling the frame assembly 10 to stably draw smoke into the smoke collection chamber 21.

[0046] The silencing component 30, as a silencing element in the range hood 1, is disposed within the smoke collection chamber 21 and forms at least one silencing cavity 40, which is used to reduce the noise generated by the range hood. The silencing component 30 itself may or may not have a silencing function; for example, the silencing component 30 may include sound-absorbing cotton, etc.

[0047] When the range hood 1 is working, it will generate noise. The noise generated by the range hood 1 includes at least the noise generated by the fan and the reverberation noise in the smoke collection chamber 21. As a semi-enclosed cavity, the noise entering the silencer 40 is difficult to be radiated and transmitted back to the exhaust duct 11 from the silencer 40. Moreover, the noise entering the silencer 40 is repeatedly reflected inside the silencer 40, and the noise is continuously weakened in the process of reflection. The setting of the silencer 40 can absorb at least part of the noise when the range hood 1 is working, thereby reducing the noise transmitted by the range hood 1 into the kitchen.

[0048] The smoke collection chamber 21 is used to collect smoke. It is understood that the smoke collection chamber 21 is connected to the exhaust duct 11, allowing the smoke in the smoke collection chamber 21 to flow into the exhaust duct 11 under the negative pressure suction of the frame assembly 10. Furthermore, the range hood 1 generates noise during operation, which is transmitted to the smoke collection chamber 21 via the exhaust duct 11. Since the silencer assembly 30 constructs at least one silencer chamber 40 within the smoke collection chamber 21, the noise transmitted to the smoke collection chamber 21 can be transmitted to the silencer chamber 40.

[0049] It should be noted that the silencing component 30 is connected to the smoke collection component 20, allowing the silencing component 30 to be stably positioned within the smoke collection chamber 21. This embodiment does not limit the connection method between the silencing component 30 and the smoke collection component 20. For example, the silencing component 30 can be fixedly connected to the smoke collection component 20 by screwing, snap-fitting, or welding. Furthermore, a slide rail can be provided on one of the silencing component 30 and the smoke collection component 20, and a slide groove can be provided on the other. The sliding engagement of the slide rail and the slide groove changes the position of the silencing component 30 within the smoke collection chamber 21, thereby changing the volume of the silencing chamber 40 and achieving better noise reduction and silencing effects.

[0050] In summary, the range hood 1 of this embodiment includes a frame assembly 10, a smoke collection assembly 20, and a silencer assembly 30. The frame assembly 10 has a smoke exhaust duct 11 and includes at least a fan disposed within the smoke exhaust duct 11. The fan is used to generate negative pressure suction, and the smoke in the smoke exhaust duct 11 is discharged outdoors or into the smoke exhaust pipe under the action of negative pressure suction. The smoke collection assembly 20 is connected to the frame assembly 10 and has a smoke collection chamber 21 communicating with the smoke exhaust duct 11. The smoke collection chamber 21 is used to contain the smoke sucked in by the fan. The silencer assembly 30 is connected to the smoke collection assembly and is disposed within the smoke collection chamber 21, forming at least one silencer chamber 40. The silencer chamber 40 is used to reduce the noise generated by the range hood 1. When the range hood 1 generates noise during operation, the silencing cavity 40 can absorb at least part of the noise in the smoke collection cavity 21. By setting the silencing cavity 40, the noise enters the silencing cavity 40 and is repeatedly reflected within the silencing cavity 40, thus increasing the number of noise reflections. As the noise is continuously reflected within the silencing cavity 40, it is absorbed by the cavity wall of the silencing cavity 40, thereby reducing the noise transmitted from the exhaust duct 11 and the smoke collection cavity 21 to the kitchen, thus making the range hood 1 have lower noise.

[0051] It is understandable that the fan has different operating speeds, and the fan speed is different at different operating speeds. The frequency of mechanical noise generated by the fan vibration and the frequency of aerodynamic noise generated when the blades cut the airflow are also different. The noise in the smoke collection chamber 21 will also generate directional radiated reverberant noise. When the silencing component 30 itself has a silencing function, different types of silencing materials can be included in the silencing component 30 to absorb noise of different frequency bands in the smoke collection chamber 21. This allows the silencing component 30 to specifically absorb noise in the smoke collection chamber 21 at specific frequency bands, thereby reducing the noise generated by the range hood 1 during operation.

[0052] For further details, please refer to... Figure 2 In one embodiment of this application, the silencing cavity 40 can be formed by the silencing component 30 itself, or it can be formed by the silencing component 30 and the smoke collection component 20 together. When the range hood 1 generates noise during operation, the noise enters the silencing cavity 40 and is repeatedly reflected within it. If the silencing cavity 40 is constructed by the silencing component 30 itself, the noise will be reflected multiple times on the silencing component 30 until most of the noise is absorbed by the cavity wall of the silencing cavity 40. If the silencing cavity 40 is constructed by the silencing component 30 and the smoke collection component 20 together, the noise will be reflected multiple times on the inner walls of the silencing component 30 and the smoke collection component 20 until most of the noise is absorbed by the cavity wall of the silencing cavity 40 and the inner wall of the smoke collection component 20. This reduces the noise transmitted from the exhaust duct 11 and the smoke collection cavity 21 to the kitchen, thereby making the range hood 1 have lower noise levels.

[0053] It should be noted that when the noise reduction component 30 is configured as a noise reduction cavity 40, sound-absorbing material, such as sound-absorbing cotton, can be placed on the inner wall of the noise reduction component 30. When noise is reflected multiple times on the noise reduction component 30 itself, the noise can be reduced more quickly, thereby enhancing the noise reduction effect inside the noise reduction cavity 40.

[0054] Furthermore, in one embodiment of this application, the silencing component 30 and the smoke collection component 20 are configured to form a semi-enclosed silencing cavity 40. In this application, each silencing cavity 40 includes at least two independent silencing sub-silencing cavities, that is, the interior of each silencing cavity 40 can be divided into smaller and more sub-silencing cavities, which makes the reduction of noise generated by the range hood 1 more efficient.

[0055] For further details, please refer to Figure 2 and Figure 3 In one embodiment of this application, the smoke collection assembly 20 includes a first smoke collection hood 22, which is connected to the frame assembly 10. The first smoke collection hood 22 has a first smoke extraction duct 221 that communicates with the smoke exhaust duct 11, and the smoke collection chamber 21 includes at least the first smoke extraction duct 221.

[0056] Understandably, the range hood 1 may include a smoke inlet (not shown in the diagram). Under the negative pressure suction of the fan, the smoke enters the first smoke extraction duct 221 through the smoke inlet and flows into the exhaust duct 11, and is finally discharged outdoors or into the exhaust pipe through the exhaust duct 11. The noise generated by the range hood 1 is constantly reflected on the inner wall of the exhaust duct 11. Some of the reflected noise is transmitted into the first smoke extraction duct 221, where it is continuously reflected and reverberates, eventually being transmitted into the kitchen through the smoke inlet.

[0057] To reduce noise at the smoke inlet and decrease the noise intensity transmitted into the kitchen, the silencing assembly 30 includes at least one first silencing component 31. The first silencing component 31 is connected to the inner wall of the first smoke hood 22 and forms a first silencing cavity 41 with the inner wall of the first smoke hood 22. The first silencing cavity 41 has a sound inlet 42 that communicates with the first smoke duct 221. The silencing cavity 40 includes at least the first silencing cavity 41.

[0058] It should be noted that this embodiment does not limit the type of the first smoke collection hood 22. For example, the first smoke collection hood 22 can be a side-suction type hood, which occupies less space and has a better effect of gathering smoke; or the first smoke collection hood 22 can also be a top-suction type hood, which has the advantages of being aesthetically pleasing and having less noise.

[0059] It should also be noted that some of the noise generated by the range hood 1 is transmitted into the first smoke extraction duct 221. The noise in the first smoke extraction duct 221 then enters the first silencing chamber 41 through the sound inlet 42. The noise is reflected multiple times on the inner walls of the first silencing component 31 and the first smoke collection hood 22 until most of the noise is absorbed by the cavity wall of the first silencing component 31 and the inner wall of the first smoke collection hood 22, thereby reducing the noise intensity in the first smoke extraction duct 221. Furthermore, since the noise in the first smoke extraction duct 221 is ultimately transmitted to the kitchen through the smoke inlet, the first silencing chamber 41 reduces the noise intensity transmitted from the range hood 1 through the smoke inlet, thereby reducing the noise emitted by the range hood 1 into the kitchen during operation.

[0060] Additionally, it should be noted that, such as Figure 3As shown, the range hood 1 may also include an oil-blocking component 60, which is disposed at the sound inlet 42 to prevent oil droplets from flowing into the first silencer cavity 41. Since oil droplets condense on the inner wall of the range hood 1, some oil droplets condense on the inner wall of the exhaust duct 11 and flow towards the first smoke extraction duct 221 and the first silencer cavity 41 under the influence of gravity. To prevent oil droplets in the exhaust duct 11 from entering the first silencer cavity 41 and reducing its noise absorption effect, an oil-blocking component 60 can be disposed at the sound inlet 42 in this embodiment. The oil-blocking component 60 is connected to at least one of the first silencer 31, the two side shells 223, the front shell 226, the back shell 225, and the top shell 224, so that the oil droplets flowing out of the exhaust duct 11 pass over the oil-blocking component 60 and move away from the surface of the first silencer cavity 41, thereby preventing oil droplets from flowing into the first silencer cavity 41. Furthermore, the connection method between the oil baffle 60 and the first smoke collection hood 22 is not limited. For example, the connection method between the oil baffle 60 and the first smoke collection hood 22 can be a fixed connection, such as welding or gluing, so that the oil baffle 60 has a relatively stable installation environment and the oil droplets flowing through the oil baffle 60 away from the surface of the first silencing cavity 41 have a relatively fixed flow path, which facilitates the setting of the internal flow path structure of the range hood 1; or, the connection method of the oil baffle 60 can be a detachable connection, such as screw connection, snap connection, or abutment connection, so that the oil baffle 60 can be disassembled and cleaned periodically.

[0061] The oil baffle 60 may also have multiple spaced sound inlets 61, which connect the first silencing cavity 41 and the first smoke extraction duct 221. The radiated noise emitted by the frame assembly 10 can enter the first silencing cavity 41 through the sound inlets 61. Thus, the oil baffle 60 can not only block oil but also have a good sound guiding effect.

[0062] Furthermore, in this embodiment, the number of first silencing components 31 is at least two, and at least a portion of the first smoke extraction duct 221 is constructed by two opposing first silencing components 31 to guide the smoke flow in the first smoke extraction duct 221 to the smoke exhaust duct 11. At least two first silencing components 31 are disposed on opposite sides within the first smoke collection hood 22, thereby achieving noise absorption within the first smoke collection hood 22.

[0063] It should be noted that at least two first silencing components 31 and the inner wall of the first smoke collection hood 22 form a semi-enclosed silencing cavity 40, which can more quickly and effectively reduce the noise of the range hood 1. The term "relative arrangement" in this embodiment can mean that the two first silencing components 31 are symmetrically arranged within the first smoke collection hood 22, or that the two first silencing cavities 41 are asymmetrically arranged within the first smoke collection hood 22. For example, the two first silencing cavities 41 can have different cavity volumes; this embodiment does not limit this.

[0064] It should also be noted that you should continue to refer to... Figure 2 and Figure 3 The smoke collection chamber 21 includes at least a first smoke extraction duct 221 and two first silencers 31. Taking the two first silencers 31 symmetrically arranged inside the first smoke collection hood 22 as an example, the two symmetrical first silencers 31 constitute a constricted flow channel in the direction of smoke flow of the first smoke extraction duct 221. When smoke flows in the first smoke extraction duct 221, the constricted flow channel can guide the smoke flow in the first smoke extraction duct 221 to the exhaust duct 11, thereby reducing the noise generated by the turbulent flow of smoke in the first smoke extraction duct 221. That is, after the smoke enters the first smoke extraction duct 221 through the smoke inlet, some of the smoke flows along the surface of the first silencer 31. The first silencer 31 constitutes the side wall surface of the first smoke extraction duct 221, which can change the flow direction of the smoke and guide the smoke in the first smoke extraction duct 221, so that the smoke can flow to the exhaust duct 11 more stably. The first silencing component 31 can also reduce the amount of smoke entering the first silencing cavity 41 from the first smoke duct 221, and prevent the smoke from accumulating in the first silencing cavity 41, thus avoiding the negative impact of the noise in the first silencing cavity 41 not being able to achieve multiple reflections.

[0065] Furthermore, in some embodiments of this application, please continue to refer to... Figure 2 and Figure 3 The first smoke hood 22 has a first smoke inlet 222, which is connected to the first smoke duct 221. The smoke flowing from the first smoke inlet 222 into the first smoke duct 221 passes through the sound inlet 42.

[0066] Understandably, the first smoke inlet 222 is the entrance for the smoke to be drawn into the range hood 1. Under the negative pressure suction of the fan, the smoke first enters the first smoke duct 221 through the first smoke inlet 222, and then flows through the sound inlet 42. Therefore, the position of the sound inlet 42 is higher than that of the first smoke inlet 222. The noise in the first smoke duct 221 will first enter the first silencer 41 through the sound inlet 42. The noise is reflected multiple times on the cavity wall of the first silencer 41, thereby reducing the noise intensity in the first smoke duct 221 and preventing the unreduced noise from leaking into the kitchen through the first smoke inlet 222.

[0067] In some embodiments of this application, please continue to refer to Figure 2 and Figure 3The first smoke hood 22 includes a top shell 224, a back shell 225, a front shell 226, and two oppositely arranged side shells 223. The top shell 224 is sealed to the frame assembly 10 and has a smoke exhaust port 2241; the back shell 225 and the front shell 226 are oppositely arranged and both are connected to the top shell 224, and the front shell 226 has a first smoke exhaust port 222 communicating with the first smoke exhaust duct 221; both side shells 223 are sealed to the top shell 224, the back shell 225, and the front shell 226, and at least one first silencer 31 is provided on at least one side shell 223.

[0068] The first silencing cavity 41 is constructed from at least one first silencing component 31, a side shell 223, a top shell 224, a back shell 225, and a front shell 226. The first silencing component 31 and the top shell 224 are spaced apart, and a sound inlet 42 is constructed between the first silencing component 31 and the top shell 224. That is, the sound inlet 42 is constructed from at least one first silencing component 31, the top shell 224, the front shell 226, and the back shell 225, and the first sound inlet 42 connects the first silencing cavity 41 and the first smoke duct 221.

[0069] Specifically, the exhaust port 2241 is the inlet for flue gas to flow from the first smoke duct 221 to the exhaust duct 11, and the first smoke port 222 is the inlet for flue gas to be drawn into the range hood 1. When the range hood 1 is working, the flue gas enters the first smoke duct 221 through the first smoke port 222, and flows into the exhaust duct 11 through the exhaust port 2241, and is finally discharged to the outside or into the exhaust pipe through the exhaust duct 11.

[0070] It should be noted that the first silencing cavity 41 in this embodiment is a semi-enclosed cavity and has a relatively small sound inlet 42. It can be understood that because the opening area of ​​the sound inlet 42 is relatively small, the noise entering the first silencing cavity 41 is difficult to be radiated and transmitted to the first smoke exhaust duct 221 again from the sound inlet 42. Moreover, because the first silencing cavity 41 has a large cavity volume, the noise entering the first silencing cavity 41 is repeatedly reflected inside the first silencing cavity 41. The noise is continuously weakened during the reflection process. The setting of the first silencing cavity 41 can absorb at least part of the noise transmitted to the first smoke exhaust duct 221 when the range hood 1 is working, thereby reducing the noise emitted by the entire range hood 1.

[0071] It should also be noted that, in the height direction H of the range hood 1, the position of the sound inlet 42 is higher than the position of the first smoke inlet 222. Regarding the noise propagation process, the higher position of the sound inlet 42 ensures that at least part of the noise emitted by the frame assembly 10 is absorbed by the first silencing cavity 41 before being transmitted to the kitchen via the first smoke inlet 222. This reduces the noise intensity emitted by the frame assembly 10 to the kitchen via the first smoke inlet 222, thus reducing the overall noise emitted by the range hood 1. Regarding the smoke propagation process, after the smoke enters the first smoke duct 221 through the first smoke inlet 222, the first silencing component 31 can change the flow direction of the smoke within the first smoke duct 221, thereby reducing the noise generated by the turbulence of the smoke within the first smoke duct 221.

[0072] Furthermore, in one embodiment of this application, please refer to Figure 2 The side shell 223 includes two oppositely arranged outer side plates 2231 and two oppositely arranged inner side plates 2232.

[0073] Specifically, the two oppositely arranged outer side plates 2231 are all sealed to the top shell 224, back shell 225, and front shell 226 to ensure the sealing of the first smoke duct 221 and the first silencing cavity 41. The two oppositely arranged inner side plates 2232 are connected to the back shell 225 and front shell 226, and the two inner side plates 2232 are disposed between the two outer side plates 2231. The inner side plates 2232 are spaced apart from the adjacent outer side plates 2231, and the first silencing component 31 is fixedly connected to the inner side plates 2232. Among them, a first silencing cavity 41 is constructed by at least one first silencing component 31, one inner side plate 2232, one outer side plate 2231, a top shell 224, a back shell 225, and a front shell 226.

[0074] It should be noted that the outer side plate 2231, as an exterior component in the side shell 223, should have good corrosion resistance and heat resistance to avoid damage to the internal components of the range hood 1 due to damage to the outer side plate 2231. This embodiment does not limit the material of the outer side plate 2231; it can be made of stainless steel or acrylic. The inner side plate 2232, as a load-bearing component in the side shell 223, provides the basis for the installation of the first silencing component 31. The inner side plate 2232 is spaced apart from the adjacent outer side plate 2231 to allow the first silencing cavity 41 to have a larger cavity volume.

[0075] Please refer to Figures 4 to 6The first smoke hood 22 includes a first air duct shell 227 and a second air duct shell 228. The first air duct shell 227 has a first sub-air duct 2271. The second air duct shell 228 is fixedly connected to the frame assembly 10 and is slidably connected to the first air duct shell 227 along the height direction H of the range hood 1. The second air duct shell 228 has a smoke exhaust port 2241 and a second sub-air duct 2281. The second sub-air duct 2281 communicates with the smoke exhaust port 2241 and the first sub-air duct 2271.

[0076] It should be noted that the first smoke extraction duct 221 includes a first sub-duct 2271 and a second sub-duct 2281. Since the second duct housing 228 has a smoke exhaust port 2241 and is connected to the frame assembly 10, the second sub-duct 2281 is closer to the frame assembly 10 than the first sub-duct 2271. Regarding noise transmission, noise emitted by the frame assembly 10 is first transmitted to the second sub-duct 2281, and then to the kitchen via the first sub-duct 2271. Regarding the flow path of the fumes, under the negative pressure suction of the fan, the fumes flow into the first sub-duct 2271 through the first smoke extraction port 222, then into the second sub-duct 2281 connected to the first sub-duct 2271, and finally into the smoke exhaust channel 11 via the smoke exhaust port 2241, thereby achieving the circulation of fumes inside the range hood 1. In this embodiment, by setting the first duct shell 227 and the second duct shell 228 to slide along the height direction H of the range hood 1, on the one hand, the first smoke collection hood 22 has a larger internal space, which facilitates the setting of the first silencer 31 and allows the first silencer cavity 41 to have a larger cavity volume, thereby increasing the sound absorption effect of the first silencer cavity 41; on the other hand, the sliding connection between the first duct shell 227 and the second duct shell 228 can change the distance between the first smoke inlet 222 and the smoke exhaust outlet 2241, so that the user can adjust the setting position of the first smoke collection hood 22 according to different usage environments, so that the range hood 1 can be used in a variety of environments, increasing the versatility of the range hood 1's application environment.

[0077] For details, please refer to Figure 4 and Figure 5 At least one first silencing element 31 is disposed on the inner wall of the first air duct shell 227, and each first silencing cavity 41 is constructed by at least the first silencing element 31, the inner wall of the first air duct shell 227 and the inner wall of the second air duct shell 228.

[0078] It is understandable that, since the first silencing component 31 is disposed on the inner wall of the first air duct shell 227, when the first air duct shell 227 slides up and down relative to the second air duct shell 228 along the height direction H of the range hood 1, the first silencing component 31 continuously changes position as the first air duct shell 227 slides, thereby causing the cavity volume of the first silencing cavity 41 to continuously change. The change in the cavity volume of the first silencing cavity 41 allows the first silencing cavity 41 to absorb noise of different frequency bands, thereby enabling the first silencing cavity 41 to have a better sound absorption effect.

[0079] In some embodiments of this application, the noise reduction assembly 30 further includes at least one second noise reduction element 32, which is disposed on the inner wall of the second air duct housing 228.

[0080] For details, please refer to Figures 4 to 6 The first air duct shell 227 has a bottom shell 2275, a first front shell 2272, a first back shell 2273, and two opposing first side shells 2274. The bottom shell 2275 is fixedly connected to the first front shell 2272, the first back shell 2273, and the two first side shells 2274. The first front shell 2272 has a first smoke inlet 222. A first silencer 31 is fixedly connected to the first front shell 2272, the first back shell 2273, and the first side shell 2274. The second air duct housing 228 includes a top housing 224, a second front housing 2284, a second back housing 2282, and two opposing second side housings 2283. The top housing 224 is fixedly connected to the second front housing 2284, the second back housing 2282, and the two second side housings 2283. The top housing 224 has a smoke exhaust port 2241 and is fixedly connected to the frame assembly 10. The second silencer 32 is fixedly connected to the top housing 224, the second front housing 2284, and the second back housing 2282. It is understood that the back housing 225 described in the previous embodiment may include a relatively slidable first back housing 2273 and a second back housing 2282, the front housing 226 described in the previous embodiment may include a relatively slidable first front housing 2272 and a second front housing 2284, and the side housing 223 described in the previous embodiment may include a relatively slidable first side housing 2274 and a second side housing 2283.

[0081] In some embodiments of this application, please refer to Figures 4 to 5 During the sliding process of the first air duct shell 227 relative to the second air duct shell 228, there is at least one open position A (e.g., Figure 4 (as shown) and a stacked position B (as shown) Figure 5 As shown), at the open position A and the stacked position B, each first silencing cavity 41 is constructed by a first silencing component 31, the inner wall of the first air duct shell 227, the inner wall of the second air duct shell 228, and a second silencing component 32, and an inlet 42 communicating with the first silencing cavity 41 is constructed between the first silencing component 31 and the second silencing component 32.

[0082] It should be noted that the open position A is the position where the first muffler 31 is not stacked with the second muffler 32. Stacking can be understood as the first muffler 31 and the second muffler 32 being stacked when, within a first muffler cavity 41, the orthographic projection of the first muffler 31 onto the corresponding second side shell 2283 at least partially overlaps with the orthographic projection of the second muffler 32 onto the corresponding second side shell 2283. The open position A is also the position where, within a first muffler cavity 41, the orthographic projections of the first muffler 31 and the second muffler 32 onto the corresponding second side shell 2283 do not overlap. When the first duct shell 227 is in the open position A, there is a large distance between the first silencer 31 and the second silencer 32. The sound inlet 42 enclosed by the first silencer 31 and the second silencer 32 has a large opening area, which makes it easier for noise in the first sub-duct 2271 and the second sub-duct 2281 to enter the first silencer cavity 41, thereby making the range hood 1 emit less noise.

[0083] It should also be noted that the stacking position B is the position where the end of the first silencing component 31 away from the first air duct shell 227 and the end of the second silencing component 32 away from the second air duct shell 228 are stacked. When the first air duct shell 227 is in the stacking position B, the distance between the first silencing component 31 and the second silencing component 32 is small, and the sound inlet 42 has a small opening area. This makes it difficult for the noise entering the first silencing cavity 41 to be radiated and transmitted to the first sub-air duct 2271 and the second sub-air duct 2281 again from the sound inlet 42. As a result, the noise entering the first silencing cavity 41 is repeatedly reflected inside the first silencing cavity 41, and the noise is continuously weakened during the reflection process. The setting of the first silencing cavity 41 can at least partially absorb the noise transmitted to the first smoke duct 221 when the frame assembly 10 is working, reduce the noise intensity of the noise emitted by the frame assembly 10 transmitted through the first smoke inlet 222, and reduce the noise emitted by the entire range hood 1.

[0084] Furthermore, when the first duct shell 227 is in the stacked position B, since the end of the first silencing component 31 away from the first duct shell 227 and the end of the second silencing component 32 away from the second duct shell 228 are stacked together, it can be avoided that the first silencing component 31 and the second silencing component 32 collide during the sliding of the first duct shell 227, thereby preventing damage to the internal structure of the range hood 1. Moreover, the stacking of the first silencing component 31 and the second silencing component 32 can also ensure that the first silencing component 31 and the second silencing component 32 can be stably arranged to form the sound inlet 42, so that noise can enter the first silencing cavity 41 through the sound inlet 42, thereby realizing the absorption of noise in the first sub-duct 2271 and the second sub-duct 2281 by the first silencing cavity 41.

[0085] It is understood that the first silencing component 31 and the second silencing component 32 may have the same or different compositional structures, and this embodiment does not limit this. In some embodiments, the first silencing component 31 and the second silencing component 32 have different compositional structures, thereby enabling the first silencing cavity 41 to selectively absorb radiated noise in different frequency bands, so that the first silencing cavity 41 has a better silencing effect.

[0086] In some embodiments of this application, please refer to Figure 4 and Figure 5 The first silencing component 31 has a first fixed end 311 and a first free end 312. The first fixed end 311 is fixedly connected to the side wall of the first air duct shell 227, that is, the first fixed end 311 is fixedly connected to the first side wall. The second silencing component 32 has a second fixed end 321 and a second free end 322. The second fixed end 321 is connected to the side wall of the second air duct shell 228, that is, the second fixed end 321 is fixedly connected to the second side wall.

[0087] When the first air duct shell 227 is in the stacked position B, for the first silencer 31 and the second silencer 32 that together form a first silencer cavity 41, the second free end 322 is farther away from the first free end 312 than the first free end 312. That is, when the first air duct shell 227 is in the stacked position B, the distance between the second free end 322 and the second side shell 2283 that together form the first silencer cavity 41 is smaller than the distance between the first free end 312 and the second side shell 2283 that together form the first silencer cavity 41. As a result, when the oil droplets condensed on the second silencer 32 drip down under the action of gravity, they can drip down to the first silencer 31, and the dripping oil droplets flow into the whole machine oil circuit under the guiding action of the first silencer 31.

[0088] Understandably, the second free end 322 is farther away from the corresponding first silencing cavity 41 than the first free end 312, making it easier for the noise radiated by the fan to enter the first silencing cavity 41. Since the first silencing component 31 can change the flow direction of the smoke in the first smoke extraction duct 221 and rectify the smoke flowing in the first sub-duct 2271, it can reduce the probability of the flowing smoke generating eddies as it flows from the first sub-duct 2271 into the second sub-duct 2281, thereby allowing the range hood 1 to emit less noise.

[0089] It should be noted that, for a second silencer 32 within a first silencer cavity 41, the second free end 322 is closer to the corresponding second side shell 2283 than the second fixed end 321. That is, the distance between the second free ends 322 of the two second silencers 32 is greater than the distance between the two second fixed ends 321. This allows the second silencer 32 to rectify the smoke within the second sub-duct 2281, preventing turbulence and thus reducing noise within the second sub-duct 2281. By setting the first silencer 31 to rectify the smoke within the first sub-duct 2271 and the second silencer 32 to rectify the smoke within the second sub-duct 2281, the noise within both the first and second sub-ducts 2271 can be further reduced, thereby reducing the overall noise of the range hood 1.

[0090] In some embodiments of this application, please refer to Figure 7 Furthermore, when the first air duct shell 227 is in the stacked position B, the minimum distance D between the first free end 312 and the corresponding second free end 322 is greater than or equal to 5mm. When the minimum distance D between the first free end 312 and the second free end 322 is less than 5mm, the opening area of ​​the sound inlet 42 is too small, and the noise emitted by the frame assembly 10 is difficult to be transmitted to the first silencing cavity 41 through the sound inlet 42. As a result, the first silencing cavity 41 cannot effectively absorb the noise in the first sub-air duct 2271 and the second sub-air duct 2281. In this embodiment, by constraining the minimum distance between the first free end 312 and the second free end 322, it is possible to ensure that the noise can smoothly enter the first silencing cavity 41, so that the first silencing cavity 41 has a better noise absorption effect.

[0091] In some embodiments of this application, please refer to Figure 1 , Figure 2 and Figure 8 When the first smoke collection hood 22 is a side-suction type hood, the smoke collection assembly 20 also includes a second smoke collection hood 23, which can be a top-suction type hood. That is, the range hood 1 at this time is a top-suction and side-suction hybrid range hood 1.

[0092] The second smoke hood 23 is fixedly connected to the first smoke hood 22 and has a second smoke extraction duct 231 communicating with the exhaust duct 11. The second smoke extraction duct 231 may have a second smoke inlet 232. It is understood that both the first smoke extraction duct 221 and the second smoke extraction duct 231 can accommodate smoke. Smoke can flow into the first smoke extraction duct 221 through the first smoke inlet 222 and then into the exhaust duct 11 through the exhaust outlet 2241; smoke can also flow into the second smoke extraction duct 231 through the second smoke inlet 232 and then into the exhaust duct 11 through the exhaust outlet 2241. In this embodiment, the first smoke extraction duct 221 and the second smoke extraction duct 231 share the same exhaust outlet 2241, which simplifies the internal duct structure of the range hood 1 and facilitates the miniaturization of the range hood 1.

[0093] In this embodiment, it is understood that the noise emitted by the rack assembly 10 can be transmitted to the kitchen not only through the first smoke inlet 222, but also through the second smoke inlet 232. To reduce the noise transmitted from the second smoke inlet 232, the silencing assembly 30 further includes a third silencing component (not shown in the figure). The third silencing component is disposed within the second smoke duct 231 and forms a second silencing cavity 43 by itself or by forming a second silencing cavity 43 with the inner wall of the second smoke hood 23. The second silencing cavity 43 is used to absorb the noise within the second smoke duct 231.

[0094] It should be noted that the silencing cavity 40 includes a first silencing cavity 41 and a second silencing cavity 43. The first silencing cavity 41 is used to absorb noise within the first smoke extraction duct 221 to reduce the noise transmitted from the first smoke extraction port 222 to the kitchen. The second silencing cavity 43 is used to absorb noise within the second smoke extraction duct 231 to reduce the noise transmitted from the second smoke extraction port 232 to the kitchen. In this embodiment, the range hood 1 is a side-suction and top-suction hybrid range hood 1, which not only has a good absorption effect on cooking fumes but also better absorbs the noise emitted by the range hood 1, reducing the noise intensity and making the noise heard by the user less.

[0095] In some embodiments of this application, please further refer to Figure 2 and Figure 10 The first sound-absorbing component 31 includes a rectifier plate 313, sound-absorbing cotton 314, and a protective cover 315.

[0096] As a rectifier component in the first silencing component 31, the rectifier plate 313 can rectify the flue gas in the first smoke duct 221 so that the flue gas in the first smoke duct 221 flows to the exhaust port 2241 under the guidance of the rectifier plate 313, thereby reducing the probability of turbulence in the flue gas in the first smoke duct 221 and thus reducing the noise generated by the turbulence in the first smoke duct 221.

[0097] The rectifier plate 313 has multiple spaced sound-absorbing holes 3131. After noise in the first smoke exhaust duct 221 is transmitted to the sound-absorbing holes 3131, the rectifier plate 313 can reduce the noise in the first smoke exhaust duct 221 through the Holtz resonant cavity effect. The Holtz resonant cavity noise reduction technology here is a well-known technology in the field of noise reduction and will not be described in detail here. This embodiment does not limit the specific structure of the sound-absorbing holes 3131. The sound-absorbing holes 3131 can be round, square, or elongated, etc., and the size and distribution density of the sound-absorbing holes 3131 should be optimized according to the actual application scenario.

[0098] The sound-absorbing cotton 314, as a sound-absorbing component in the first silencing component 31, can absorb noise in the first smoke extraction duct 221 and the silencing cavity 40, and can prevent noise in the silencing cavity 40 from being transmitted into the first smoke extraction duct 221. To prevent smoke in the first smoke extraction duct 221 from flowing into the first silencing cavity 41 through the sound-absorbing hole 3131, the sound-absorbing cotton 314 covers the sound-absorbing hole 3131 along the orthogonal projection of the hole depth direction, so as to block smoke from entering the first silencing cavity 41 through the sound-absorbing hole 3131, and prevent the accumulation of oil fumes in the silencing cavity 40 from reducing the noise absorption effect of the silencing cavity 40.

[0099] The protective cover 315 serves as a protective component in the first silencing element 31 to prevent oil droplets from adsorbing onto the surface of the sound-absorbing cotton 314. The protective cover 315 is used to press against the sound-absorbing cotton 314 and is fixedly connected to the rectifier plate 313 to stably fix the sound-absorbing cotton 314 onto the rectifier plate 313. It is understood that when the protective cover 315 is disposed on the rectifier plate 313, sound-absorbing cotton 314 can also be disposed on the surface of the protective cover 315 near the first silencing cavity 41 to further enhance the noise absorption effect of the first silencing cavity 41.

[0100] In some embodiments, the rectifier plate 313 is fixedly connected to the inner wall of the first smoke hood 22, so that the first silencer 31 divides the internal space of the first smoke hood 22 into a first smoke duct 221 and a first silencer cavity 41. Since the noise entering the first silencer cavity 41 is difficult to be transmitted to the first smoke duct 221 again through the sound inlet 42, the noise entering the first silencer cavity 41 is repeatedly reflected in the first silencer cavity 41, reducing the noise intensity in the first silencer cavity 41, thereby reducing the noise emitted by the range hood 1. Alternatively, the protective cover 315 is disposed between the rectifier plate 313 and the inner wall of the first smoke hood 22, that is, an additional layer of sound-absorbing cotton 314 and a protective cover 315 are added between the rectifier plate 313 and the inner wall of the first smoke hood 22, thereby enabling the first silencer cavity 41 to have a better noise absorption effect.

[0101] Furthermore, the rectifier plate 313 includes a first rectifier section 3132 and a second rectifier section 3133 connected together, and the second rectifier section 3133 is fixedly connected to the inner wall of the first smoke collection hood 22. In the height direction H of the range hood, the rectifier plate 313 extends towards the smoke exhaust port 2241, and the first rectifier section 3132 is closer to the smoke exhaust port 2241 than the second rectifier section 3133; in the width direction of the range hood, the two rectifier plates 313 are arranged facing each other. In this embodiment, by setting the first rectifier 3132 and the second rectifier 3133, on the one hand, the smoke in the first smoke duct 221 can be rectified more smoothly, reducing the noise generated by the turbulent flow of smoke in the first smoke duct 221; on the other hand, the second rectifier 3133 is closer to the first smoke inlet 222 than the first rectifier 3132, thereby giving the first silencing cavity 41 a larger cavity volume, which can better reflect noise in the first silencing cavity 41, so that the first silencing cavity 41 has a better silencing effect.

[0102] In some embodiments of this application, please refer to Figure 2 , Figure 4 and Figure 5 The range hood 1 also includes a sound-absorbing component 50, which is disposed within the silencing cavity 40 to better absorb noise within the silencing cavity 40. This embodiment does not limit the specific structure or material type of the sound-absorbing component 50. For example, the sound-absorbing component 50 can absorb noise in different frequency bands, allowing it to specifically absorb noise in a specific frequency band, such as the low-frequency band, within the silencing cavity 40, thereby reducing the noise generated by the range hood 1 during operation. Alternatively, the sound-absorbing component 50 can be a wave-shaped structure or a mountain-shaped structure (e.g.,...). Figure 9 As shown in the figure, this increases the number of noise reflections within the silencing cavity 40, thereby reducing the noise intensity during the reflection process and enabling the silencing cavity 40 to better absorb and reduce noise.

[0103] The sound-absorbing component 50 can also be disposed on the inner wall of the smoke collection component 20 and / or on the side of the sound-absorbing component 30 near the corresponding sound-absorbing cavity 40. In this embodiment, the placement of the sound-absorbing component 50 is not limited.

[0104] In some embodiments of this application, the silencing cavity 40 and the smoke collection cavity 21 are connected via the sound inlet 42. That is, noise in the first smoke duct 221 is transmitted to the silencing cavity 40 via the sound inlet 42. In some embodiments, the sound-absorbing component 50 is positioned directly opposite the sound inlet 42 so that the noise entering the silencing cavity 40 can be preferentially absorbed by the sound-absorbing component 50, thereby reducing the intensity of the noise reflected in the silencing cavity 40, so that the silencing cavity 40 has a better silencing effect.

[0105] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A range hood, characterized in that, include: A rack assembly having a smoke exhaust duct and including at least a fan disposed within the smoke exhaust duct; A smoke collection assembly is connected to the frame assembly and has a smoke collection chamber communicating with the exhaust duct. The smoke collection assembly includes a first smoke collection hood, which is connected to the frame assembly and has a first smoke extraction duct communicating with the exhaust duct. The smoke collection chamber includes at least the first smoke extraction duct. A noise reduction assembly, connected to the smoke collection assembly, is disposed within the smoke collection chamber and forms at least one noise reduction cavity. The noise reduction cavity is used to reduce the noise generated by the range hood. The noise reduction assembly includes at least one first noise reduction element, which is connected to the inner wall of the first smoke collection hood and forms at least one noise reduction cavity with the inner wall of the first smoke collection hood. The first noise reduction cavity has a sound inlet communicating with the first smoke extraction duct. The noise reduction cavity at least includes the first noise reduction cavity; and... An oil baffle is provided at the sound inlet and is connected to the first smoke collection hood; The first smoke hood includes a first duct shell and a second duct shell; the second duct shell is connected to the frame assembly and is slidably connected to the first duct shell along the height direction of the range hood; at least one first silencing component is disposed on the inner wall of the first duct shell, and each first silencing cavity is constructed by at least the first silencing component, the inner wall of the first duct shell, and the inner wall of the second duct shell.

2. The range hood as described in claim 1, characterized in that, The silencing component itself forms the silencing cavity; or, the silencing component and the smoke collection component together form the silencing cavity.

3. The range hood as described in claim 1, characterized in that, Each of the aforementioned silencing cavities comprises at least two independent silencing sub-cavities.

4. The range hood as described in claim 1, characterized in that, The number of the first silencer is at least two, and at least part of the first smoke duct is constructed by two oppositely arranged first silencers to guide the smoke flow in the first smoke duct to the exhaust duct.

5. The range hood as described in claim 1, characterized in that, The first smoke hood has a first smoke inlet, which is connected to the first smoke duct. Smoke flowing from the first smoke inlet into the first smoke duct passes through the inlet.

6. The range hood as described in claim 1, wherein the first smoke collection hood comprises: Two opposing side shells, at least one of which is provided with at least one first sound-absorbing element; The top shell is connected to the two side shells and the frame assembly, and has a smoke vent. The back shell is connected to the two side shells and the top shell; The front shell is connected to the two side shells and the top shell, and is disposed opposite to the back shell, and has a first smoke inlet communicating with the first smoke duct; The first silencing cavity is constructed from at least a first silencing component, a side shell, a top shell, a back shell, and a front shell, and the first silencing component and the top shell are spaced apart to form a sound inlet.

7. The range hood as described in claim 6, characterized in that, The side shell includes: The two oppositely arranged outer side plates are all connected to the top shell, the back shell, and the front shell; Two opposing inner side plates are connected to the back shell and the front shell. The two inner side plates are disposed between the two outer side plates. The inner side plates are spaced apart from the adjacent outer side plates. The first sound-absorbing component is connected to the inner side plates. The first silencing cavity is constructed from at least a first silencing component, an inner side plate, an outer side plate, a top shell, a back shell, and a front shell.

8. The range hood as described in claim 1, characterized in that, The first air duct shell has a first sub-air duct; The second air duct shell has a second sub-air duct and a smoke exhaust port, and the second sub-air duct is connected to the smoke exhaust port and the first sub-air duct; The first smoke extraction duct includes a first sub-duct and a second sub-duct.

9. The range hood as described in claim 1, characterized in that, The noise reduction assembly also includes: At least one second silencer is disposed on the inner wall of the second air duct shell; During the sliding process of the first air duct shell relative to the second air duct shell, there is at least one open position. At the open position, each of the first silencing chambers is constructed by the first silencing component, the inner wall of the first air duct shell, the inner wall of the second air duct shell, and the second silencing component. An inlet communicating with the first silencing chamber is constructed between the first silencing component and the second silencing component.

10. The range hood as described in claim 9, characterized in that, During the sliding process of the first air duct shell relative to the second air duct shell, there is also a stacking position where the end of the first silencing component away from the first air duct shell and the end of the second silencing component away from the second air duct shell are stacked on each other.

11. The range hood as described in claim 10, characterized in that, The first silencer has a first fixed end and a first free end, and the first fixed end is connected to the inner wall of the first air duct shell; The second silencer has a second fixed end and a second free end, and the second fixed end is connected to the inner wall of the second air duct shell; Specifically, for the first silencing component and the second silencing component that form the same first silencing cavity, when the first air duct shell is in the stacked position, the second free end is farther away from the corresponding first silencing cavity than the first free end.

12. The range hood as described in claim 11, characterized in that, When the first air duct shell is in the stacked position, for the first silencing component and the second silencing component that form the same first silencing cavity, the minimum distance between the first free end and the corresponding second free end is greater than or equal to 5mm.

13. The range hood as described in claim 1, characterized in that, The first smoke collection hood is a side-suction type hood or a top-suction type hood. When the first smoke collection hood is a side-suction type hood, the smoke collection assembly further includes: The second smoke hood is connected to the first smoke hood and has a second smoke exhaust duct that communicates with the smoke exhaust duct. The noise reduction assembly also includes: The third silencer is disposed in the second smoke duct and forms a second silencer cavity by itself or by forming a second silencer cavity with the inner wall of the second smoke hood. The silencer cavity further includes the second silencer cavity.

14. The range hood as described in claim 1, characterized in that, The first silencer includes: The rectifier plate has multiple spaced sound-absorbing holes; Sound-absorbing cotton is at least covered over the sound-absorbing holes; The protective cover is pressed against the sound-absorbing cotton and is fixedly connected to the rectifier plate; The rectifier plate is fixedly connected to the inner wall of the smoke collection assembly, or the protective cover is fixedly disposed between the rectifier plate and the inner wall of the smoke collection assembly.

15. The range hood according to any one of claims 1-14, characterized in that, Range hoods also include: A sound-absorbing component is disposed within the silencing cavity and is fixedly connected to the inner wall of the smoke collection component and / or the silencing component.

16. The range hood as described in claim 15, characterized in that, The silencing cavity has a sound inlet for communicating with the smoke exhaust duct, and the sound absorption component is positioned opposite the sound inlet.

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