CN114623476A

CN114623476A - Fume exhaust fan

Info

Publication number: CN114623476A
Application number: CN202210126215.2A
Authority: CN
Inventors: 杨川; 张恩齐
Original assignee: Hisense Shandong Kitchen and Bathroom Co Ltd
Current assignee: Hisense Shandong Kitchen and Bathroom Co Ltd
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2022-06-14
Anticipated expiration: 2042-02-10
Also published as: CN114623476B

Abstract

The application discloses range hood relates to kitchen electrical equipment technical field to reduce the noise that range hood produced at the during operation. The range hood of the application comprises a machine shell, a fan and at least one sound absorption piece. The shell is provided with an air suction port and an air exhaust port, and an air duct is formed between the air suction port and the air exhaust port. The fan is arranged in the air duct, and the air flow introduced by the fan enters the air duct through the air suction port and is discharged from the air exhaust port. The sound absorption piece is arranged in the air duct, and a resonant cavity and at least one sound wave channel are arranged in the sound absorption piece. One end of the sound wave channel is communicated with the resonant cavity, and the other end of the sound wave channel is communicated with the air duct. The resonant cavity is configured to resonate with acoustic waves entering the resonant cavity. The range hood of the application is used for pumping away the oil smoke generated in the cooking process from the upper part of a stove.

Description

Cooking fume exhauster

Technical Field

The application relates to the technical field of kitchen electrical equipment, in particular to a range hood.

Background

The range hood is a kitchen appliance for purifying kitchen environment, is usually installed above a kitchen stove, and can rapidly exhaust waste gas generated by combustion of the kitchen stove and oil smoke harmful to human bodies generated in a cooking process and discharge the waste gas and the oil smoke out of a room, so that kitchen pollution is reduced, and kitchen air is purified.

With the improvement of living standard of people, the range hood is widely applied, and the sanitary environment of a kitchen is improved. However, in the prior art, the range hood generates a large noise during operation, and the user experience is poor.

Disclosure of Invention

The application provides a range hood, can reduce the noise that range hood produced at the during operation.

In order to achieve the purpose, the technical scheme is as follows:

a range hood comprises a machine shell, a fan and at least one sound absorption piece.

The shell is provided with an air suction port and an air exhaust port, and an air channel is formed between the air suction port and the air exhaust port. The fan is arranged in the air duct, and the air flow introduced by the fan enters the air duct through the air suction port and is discharged from the air exhaust port. The sound absorption piece is arranged in the air duct, and a resonant cavity and at least one sound wave channel are arranged in the sound absorption piece. One end of the sound wave channel is communicated with the resonant cavity, and the other end of the sound wave channel is communicated with the air duct; the resonant cavity is configured to resonate with acoustic waves entering the resonant cavity.

In some embodiments, the acoustic channel comprises a plurality of sub-acoustic channels, which are connected in series. Each of the sub acoustic channels is configured such that acoustic wave energy entering the sub acoustic channel creates friction with the side walls of the sub acoustic channel. Wherein the port of each of the sub acoustic channels has a first axis that is perpendicular to a plane in which the port is located. And the first axes of the ports of at least one group of two connected sub-acoustic channels intersect.

In some embodiments, the plurality of sub-acoustic channels includes a plurality of curved sub-channels and a plurality of straight sub-channels, and the plurality of curved sub-channels are alternately connected with the plurality of straight sub-channels one by one. The first axis of the port connected with the linear sub-channel is perpendicular to the first axis of the port connected with the linear sub-channel.

In some embodiments, the sound absorber comprises a plurality of sound wave channels arranged along a circumference of the resonant cavity. The plurality of curved sub-channels are arranged along the circumferential direction of the resonant cavity, and the plurality of linear sub-channels are arranged along the radial direction of the resonant cavity.

In some embodiments, the sound absorber is directed toward the resonant cavity along the outer side in the circumferential direction of the sound absorber, and the lengths of the plurality of curved sub-channels become progressively shorter; and/or the lengths of the plurality of linear sub-channels are equal.

In some embodiments, the sound absorber includes at least two sound absorbing structures, each sound absorbing structure including a redirecting wall and a plurality of sound absorbing walls. The direction-changing wall is arranged along the radial direction of the resonant cavity, and the sound-absorbing wall is arranged along the circumferential direction of the resonant cavity. And the sound absorption walls of every two adjacent sound absorption structures are staggered. The curved sub-channel is formed between the sound-absorbing wall of one sound-absorbing structure and the sound-absorbing wall of the other sound-absorbing structure in two adjacent sound-absorbing structures. The end part of the sound absorbing wall of one sound absorbing structure in the two adjacent sound absorbing structures and the direction changing wall of the other sound absorbing structure form the linear sub-channel.

In some embodiments, the sound absorber includes 2N sound absorbing structures, where N ≧ 1, and N is a positive integer. And a plurality of sound absorbing walls of each sound absorbing structure are symmetrically arranged along the direction-changing wall.

In some embodiments, the width of the acoustic channel is substantially equal, and the width of the acoustic channel is less than or equal to 1 mm.

In some embodiments, each of the sound absorbers is provided with a plurality of sound channels, the plurality of sound channels includes at least a first sound channel and a second sound channel, and the width of the first sound channel is larger than that of the second sound channel.

In some embodiments, the range hood comprises a plurality of sound absorbers including at least one first sound absorber, at least one second sound absorber, and at least one third sound absorber. The at least one first sound absorbing piece is arranged between the air suction port and the fan, the at least one second sound absorbing piece is arranged between the air exhaust port and the fan, and the at least one third sound absorbing piece is arranged between the fan and the side wall of the air duct.

The range hood provided by the embodiment of the invention is internally provided with the sound absorption piece in the air duct, and the sound absorption piece is internally provided with the resonant cavity and at least one sound wave channel. One end of the sound wave channel is communicated with the resonant cavity, and the other end of the sound wave channel is communicated with the air duct, namely, the air duct is communicated with the resonant cavity through the sound wave channel. That is, the sound wave in the wind channel can be transmitted to the resonant cavity through the sound wave channel. In addition, since the resonant cavity is configured to resonate with the acoustic wave entering the resonant cavity, the acoustic wave transmitted into the resonant cavity through the acoustic wave channel can resonate with the resonant cavity. Based on this, the sound wave that range hood during operation produced can get into the resonance chamber through the sound wave passageway to take place resonance with the resonance chamber, thereby is consumed. By the above, the range hood provided by the embodiment of the disclosure can realize the noise elimination and reduction effects through the sound absorption member arranged, thereby effectively reducing the noise generated during the operation of the range hood and improving the user experience.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic view of an internal structure of a range hood according to some embodiments of the present disclosure;

FIG. 2 is a schematic structural view of a sound absorber with a top panel removed as provided in some embodiments of the present application;

FIG. 3 is a schematic structural view of a sound absorber provided in some embodiments of the present application;

FIG. 4 is a top view of an acoustical structure provided by some embodiments of the present application;

FIG. 5 is a top view of a sound absorbing structure provided by some embodiments of the present application;

FIG. 6 is a top view of a sound absorbing structure provided by some embodiments of the present application;

FIG. 7 is a top view of a sound absorbing structure provided by some embodiments of the present application;

FIG. 8 is a top view of an acoustical structure provided by some embodiments of the present application;

FIG. 9 is a top view of a sound absorbing structure provided by some embodiments of the present application;

FIG. 10 is a top view of a sound absorbing structure provided by some embodiments of the present application;

FIG. 11 is a top view of a sound absorbing structure provided by some embodiments of the present application;

fig. 12 is a top view of a sound absorbing structure provided in some embodiments of the present application.

Reference numerals:

100-range hood; 1-a machine shell; 11-suction port; 12-an exhaust port; 13-an air duct; 2-a fan; 3-a sound absorber; 31-a resonant cavity; 32-an acoustic channel; 321-sub acoustic wave channels; 3211-curvilinear sub-channel; 3212-a linear subchannel; 322-a first acoustic channel; 323-second acoustic channel; 324-a third acoustic channel; 325-fourth acoustic channel; 326-fifth sound wave channel; 327-sixth acoustic channel; 33-sound absorbing structure; 331-a redirecting wall; 332-sound-absorbing walls; 34-a bottom plate; 35-top plate.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.

It should be noted that in practical applications, due to the limitation of the precision of the device or the installation error, the absolute parallel or perpendicular effect is difficult to achieve. In the present application, the description of "perpendicular", "parallel" or "same direction" is not an absolute limitation, but means that a perpendicular or parallel structural arrangement can be achieved within a preset error range, and a corresponding preset effect is achieved, so that the technical effect of limiting the features can be maximally achieved, and the corresponding technical scheme is convenient to implement and has high feasibility. For example, "perpendicular" includes absolute perpendicular and approximately perpendicular, where an acceptable deviation from approximately perpendicular may also be within 5 °, for example. "parallel" includes absolute parallel and approximately parallel, wherein an acceptable deviation from approximately parallel may also be, for example, within 5 °. "co-directional" includes absolute co-directional and approximately co-directional, wherein an acceptable deviation range for approximately co-directional may also be, for example, a deviation within 5 °.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

With the improvement of living standard, people have higher pursuit for living quality, and have higher expectation for healthy and sanitary living environment. Various air-purifying products have come into play and are sought after in the market. Wherein, the range hood for purifying the kitchen air is widely applied.

The range hood is also called as a range hood, and is a kitchen appliance for purifying the kitchen environment. Generally, a range hood is installed above a cooking range in a kitchen, and can rapidly exhaust waste generated during combustion of the cooking range and oil smoke harmful to human bodies generated during cooking to a public flue or outdoors to reduce indoor air pollution and purify indoor air. The range hood can create a sanitary and healthy cooking environment for users, and has the safety guarantee effects of gas defense and explosion prevention.

In some related technologies, the range hood generates strong noise when working, and when the range hood is used in a strong noise environment for a long time, adverse reactions such as headache, dysphoria, palpitation and the like can be generated to a user, so that the physical health of the user is seriously affected.

Based on this, in order to reduce the noise generated by the range hood during operation, referring to fig. 1, the embodiment of the present application provides a range hood 100, where the range hood 100 includes a casing 1, a fan 2, and at least one sound absorbing member 3.

The housing 1 is provided with an air inlet 11 and an air outlet 12, and an air duct 13 is formed between the air inlet 11 and the air outlet 12. The fan 2 is disposed in the air duct 13, and the air flow introduced by the fan 2 enters the air duct 13 through the air suction port 11 and is discharged from the air discharge port 12.

It should be noted that the exhaust port 12 of the range hood 100 is typically in communication with a common flue or the outside. In this way, when the fan 2 is operated, cooking fumes are introduced into the air duct 13 through the air inlet 11 and are finally discharged to a common flue or the outside through the air outlet 12, thereby purifying indoor air.

Wherein, the process of the range hood 100 for sucking the oil smoke completely follows the air hydrodynamics principle: in two adjacent space regions, as long as there is a pressure difference, the gas flows from a place with high pressure to a place with low pressure. That is, when the range hood 100 is in a working state, that is, when the fan 2 is started, the air in the air duct 13 of the range hood 100 is exhausted to the common flue or the outside through the exhaust port 12, so that a negative pressure region with a large pressure difference with the surrounding region is formed in the air duct 13. At this time, the cooking fume generated during cooking is sucked by the negative pressure region in the process of rising, enters the air duct 13 of the range hood 100 through the air suction port 11, and is finally discharged to the public flue or the outside through the air duct 13, so that the indoor air is purified.

Referring to fig. 1, fig. 2 and fig. 3, a sound absorber 3 is disposed in an air duct 13 of a range hood 100 according to an embodiment of the present invention, and a resonant cavity 31 and at least one sound wave channel 32 are disposed in the sound absorber 3. One end of the acoustic channel 32 is communicated with the resonant cavity 31, and the other end is communicated with the air duct 13, that is, the air duct 13 and the resonant cavity 31 are communicated through the acoustic channel 32. That is, the sound waves in the wind tunnel 13 can be transmitted into the resonant cavity 31 through the sound wave channel 32. In addition, since the resonant cavity 31 is configured to resonate with the acoustic wave entering the resonant cavity 31, the acoustic wave transmitted into the resonant cavity 31 through the acoustic wave channel 32 can resonate with the resonant cavity 31. Based on this, the sound wave generated by the range hood 100 during operation can enter the resonant cavity 31 through the sound wave channel 32, and resonate with the resonant cavity 31, so as to be consumed. Therefore, the range hood 100 provided by the embodiment of the present disclosure can realize the noise elimination and reduction effect through the sound absorbing member 3, so that the noise generated during the operation of the range hood 100 is effectively reduced, and the user experience is improved.

Referring to fig. 1, in some embodiments, the fan 2 is a centrifugal fan. It is understood that the fan 2 may also be an axial fan, and the disclosure is not limited thereto.

Illustratively, a centrifugal fan includes a volute and a centrifugal fan disposed within the volute. Wherein, the axial air inlet side of the volute corresponding to the centrifugal fan is provided with an air inlet, and the side of the volute opposite to the air outlet is provided with an air outlet.

Referring to fig. 1, 2, and 4, in some embodiments, the width of the acoustic channel 32 is approximately equal, and the width of the acoustic channel 32 is less than or equal to 1 mm. Illustratively, the width of the acoustic channel 32 may be any of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9 mm.

The central frequency of the sound wave that the sound absorbing member 3 can absorb is related to the width of the sound wave channel 32, the width of the sound wave channel 32 can be specifically selected according to the central frequency of the sound wave that needs to be absorbed actually, and when the fluctuation frequency of the sound wave is consistent with the sound absorbing central frequency of the sound absorbing member 3, the sound absorbing member 3 has the best noise elimination and reduction effect.

Arranged in this way, the wave frequency of the sound waves entering the resonant cavity 31 from the sound wave channel 32, corresponding to the center frequency of the sound waves that can be absorbed by the sound absorbing member 3, is more likely to resonate with the resonant cavity 31 and be consumed. Therefore, the sound absorption effect of the sound absorption piece 3 can be improved, and the noise generated when the range hood 100 works can be reduced.

Wherein, the calculation formula of the sound absorption center frequency of the sound absorption piece 3 is as follows:

here, f is the sound absorption center frequency of the sound absorber 3; c is the speed of sound propagation in the medium; s is the cross-sectional area of the acoustic channel 32 in the extending direction thereof; v is the volume of the resonant cavity 31; z is the length of the acoustic channel 32, i.e., the length of the acoustic channel 32 in the direction of its extension.

Referring to fig. 2, in some embodiments, the height of the sound wave channel 32 is equal to the height of the resonant cavity 31, and the sound absorption center frequency of the sound absorber 3 is calculated as follows:

wherein f is the center frequency of attraction of the sound absorber 3; c is the speed of sound propagation in the medium; d is the width of the acoustic channel 32; s' is a cross-sectional area of the resonant cavity 31 in a height direction thereof; z is the length of the acoustic channel 32 in its direction of extension.

Referring to fig. 1, 3 and 5, most of the noise generated by the range hood 100 during operation has a center frequency of 620 Hz. At this time, the size structure of the sound absorber 3 can be designed according to the above formula, so that the sound absorption center frequency of the sound absorber 3 is 620Hz, thereby improving the sound absorption effect of the sound absorber 3 and more effectively reducing the noise generated when the range hood 100 works.

For example, the width of the sound wave channel 32 of the sound absorber 3 is 0.5mm, and the cross-sectional area of the resonance chamber 31 of the sound absorber 3 in the height direction is 48mm²The sound wave passage of the sound absorber 3 has a length of 80 mm. In this case, the sound absorption center frequency of the sound absorber 3 is close to 620Hz, and the sound absorber 3 has a good effect of absorbing and consuming noise having a center frequency of 620 Hz.

Referring to fig. 1 and 5, in some embodiments, the acoustic channel 32 includes a plurality of sub-acoustic channels 321, and the plurality of sub-acoustic channels 321 are connected in series. Each sub acoustic wave channel 321 is configured such that acoustic wave energy entering the sub acoustic wave channel 321 generates friction with the side wall of the sub acoustic wave channel 321. By this arrangement, part of the sound waves generated by the operation of the range hood 100 enter the sound wave channel 32 and generate friction with the side wall of the sound wave channel 32. Based on this, part of the sound energy of the sound wave entering the sound wave channel 32 is converted into heat energy and consumed. Therefore, the sound absorption effect of the sound absorption piece 3 can be improved, and the noise generated when the range hood 100 works can be effectively reduced.

On this basis, referring to fig. 6, the port of each sub acoustic channel 321 has a first axis, which is perpendicular to the plane of the port. In the plurality of sub acoustic channels 321, first axes of ports including at least one group of two sub acoustic channels 321 connected intersect.

The intersection of the first axes of the ports of the two connected sub acoustic channels 321 means that the axes of the two sub acoustic channels 321 do not coincide at the interface position where the two sub acoustic channels 321 are connected to each other.

That is, the axes of at least one group of two connected sub-acoustic channels 321 are not collinear, and the two sub-acoustic channels 321 are not connected in a smooth transition manner.

Accordingly, when the sound wave entering the sound wave channel 32 propagates to the connection point of the two sub sound wave channels 321, the sound wave collides with the side wall of the sound wave channel 32, and a part of the sound energy is consumed. Therefore, the sound absorption effect of the sound absorption piece 3 can be further improved, and the noise generated when the range hood 100 works can be further reduced.

Referring to fig. 7, the first axes of the ports of the two connected sub acoustic wave channels 321 form an included angle, which may be a right angle, an acute angle, or an obtuse angle. For example, the angle is a right angle.

Referring to fig. 1 and 8, in some embodiments, the plurality of sub-acoustic channels 321 includes a plurality of curved sub-channels 3211 and a plurality of straight sub-channels 3212, and the plurality of curved sub-channels 3211 and the plurality of straight sub-channels 3212 are alternately connected one by one. That is, along the extending direction of the acoustic wave channel 32, a curved sub-channel 3211 is connected between every two adjacent straight sub-channels 3212; similarly, along the extending direction of the acoustic channel 32, a straight sub-channel 3212 is connected between every two adjacent curved sub-channels 3211.

It will be appreciated that sound waves propagating in curved channels will collide with the side walls of the channel a greater number of times than in straight channels; and the sound wave is propagated in a curved channel, and the friction between the sound wave and the side wall of the channel is more sufficient.

On the basis, the plurality of curved sub-channels 3211 are arranged in the sub-acoustic channel 321, so that on one hand, the acoustic waves collide with the side wall of the acoustic channel 32 for more times in the acoustic channel 32, and more acoustic energy is consumed; on the other hand, the sound wave can generate more sufficient friction with the side wall of the sound wave channel 32, so that more sound energy is converted into heat energy, and more sound energy is consumed. That is, by disposing a plurality of curved sub-channels 3211 in the sub-sonic channel 321, more sonic energy can be consumed by the sub-sonic channel 321, so as to improve the sound absorption effect of the sound absorber 3 and more effectively reduce the noise generated when the range hood 100 operates.

On this basis, referring to fig. 9, a first axis of a port where the curved sub-passage 3211 connects with the linear sub-passage 3212 is perpendicular to a first axis of a port where the linear sub-passage 3212 connects with the curved sub-passage 3211. In this way, when the sound wave enters the linear sub-channel 3212 from the curved sub-channel 3211, or enters the curved sub-channel 3211 from the linear sub-channel 3212, the sound wave collides with the side wall of the sound wave channel 32 in the front direction; therefore, more sound energy can be consumed, the sound absorption effect of the sound absorption piece 3 is further improved, and the noise generated when the range hood 100 works is reduced.

It should be noted that an included angle is formed between a first axis of a port, connected to the curved sub-passage 3211 and the linear sub-passage 3212, and the included angle may be a right angle, an acute angle, or an obtuse angle. For example, the angle is a right angle.

The extension length of the curved sub-passage 3211 is greater than that of the linear sub-passage 3212. By this way, the sound wave channel 32 can consume more sound energy, further improve the sound absorption effect of the sound absorption member 3, and reduce the noise generated when the range hood 100 works.

In some embodiments, the sound absorber 3 comprises a plurality of sound wave channels 32, and the plurality of sound wave channels 32 are arranged along the circumference of the resonant cavity 31. Wherein, a plurality of curved sub-passages 3211 are arranged along the circumferential direction of the resonant cavity 31, and a plurality of linear sub-passages 3212 are arranged along the radial direction of the resonant cavity 31.

With this arrangement, the layout of the acoustic channel 32 is more reasonable, and the space around the resonant cavity 31 can be fully utilized to provide a longer acoustic channel 32. As such, the path of the acoustic wave traveling within the acoustic channel 32 is longer and the acoustic channel 32 is able to dissipate more acoustic energy. Therefore, the sound absorption effect of the sound absorption piece 3 can be improved, and the noise generated when the range hood 100 works can be reduced.

In some embodiments, the sound absorber 3 is directed outwardly in the circumferential direction toward the resonant cavity 21, and the plurality of curved sub-passages 3211 are progressively shorter in length, and the plurality of straight sub-passages 3212 are equal in length.

Illustratively, the curved sub-passages 3211 are arc-shaped, and the curved sub-passages 3211 are distributed in a fan shape. Wherein, the distance between every two adjacent curve sub-channels 3211 is equal. At this time, the linear sub-tunnels 3212 connecting the adjacent two curved sub-tunnels 3211 have the same length. With this arrangement, the space around the resonant cavity 31 can be fully utilized, the layout of the acoustic wave channels 32 is more compact, and the space utilization rate is higher.

In some embodiments, the sound absorber 3 comprises at least two sound absorbing structures 33, each sound absorbing structure 33 comprising one redirecting wall 331 and a plurality of sound absorbing walls 332. The deflecting wall 331 is disposed along a radial direction of the resonant cavity 31, and the sound-absorbing wall 332 is disposed along a circumferential direction of the resonant cavity 31. The sound-absorbing walls 332 of every two adjacent sound-absorbing structures 33 are staggered. The sound absorbing wall 332 of one sound absorbing structure 33 of the two adjacent sound absorbing structures 33 and the sound absorbing wall 332 of the other sound absorbing structure 33 form a curved sub-passage 3211 therebetween. A linear sub passage 3212 is formed between the end of the sound absorbing wall 332 of one sound absorbing structure 33 of the two adjacent sound absorbing structures 33 and the direction changing wall 331 of the other sound absorbing structure 33.

Based on this, the two adjacent sound absorbing structures 33 are provided independently of each other. In this way, when the sound absorbing member 3 needs to be cleaned, two adjacent sound absorbing structures 33 can be separated and cleaned respectively. It can be understood that the distance between two adjacent curved sub-channels 3211 on the same sound-absorbing structure 33 is greater than the distance between two adjacent curved sub-channels 3211 of two adjacent sound-absorbing structures 33 after the assembly. Therefore, two adjacent sound absorbing structures 33 are separated and respectively cleaned, so that the cleaning difficulty of the sound absorbing piece 3 can be reduced, and the cleaning efficiency of the sound absorbing piece 3 is improved.

Referring to fig. 9, the sound absorber 3 illustratively includes three sound-absorbing structures 33, wherein the sound-absorbing walls 332 of two sound-absorbing structures 33 are symmetrically arranged along the transition wall 331. In the other sound absorbing structure 33, the sound absorbing walls 332 on both sides of the direction changing wall 331 are sequentially arranged in a staggered manner, that is, one sound absorbing wall 332 on one side of the direction changing wall 331, a connecting line between the sound absorbing wall 332 and the direction changing wall 331, and a connecting line between two adjacent sound absorbing walls 332 on the other side of the direction changing wall 331 and the direction changing wall 331.

Referring to fig. 8, in other embodiments, the sound absorber 3 includes three sound absorbing structures 33, and the three sound absorbing structures 33 are identical in structure. In this sound absorbing structure 33, the plurality of sound absorbing walls 332 located on both sides of the direction changing wall 331 are arranged in a staggered manner in order. That is, a connection line between one sound-absorbing wall 332 disposed on one side of the direction-changing wall 331 and the direction-changing wall 331 is located between connection lines between two adjacent sound-absorbing walls 332 and the direction-changing wall 331 on the other side of the direction-changing wall 331.

It should be noted that the sound absorbing member 3 may include two sound absorbing structures 33, or may include more sound absorbing structures 33, which may be specifically set according to actual situations, and this disclosure is not particularly limited thereto.

On this basis, referring to fig. 2 and 3, the sound absorbing member 3 further includes a bottom plate 34 and a top plate 35, and the bottom plate 34 and the top plate 35 are respectively disposed at both ends of the sound absorbing structure 33 along the axial direction of the resonance chamber 31. By providing the bottom plate 34 and the top plate 35, the sound-absorbing structures 33 provided independently of each other can be hermetically fixed to form the resonance chamber 31 and the sound wave passage 32.

Note that the bottom plate 34 and the top plate 35 may be provided integrally with the sound absorbing structure 33; or can be arranged separately and connected together by clamping, gluing, screw connection, riveting and the like.

Referring to FIGS. 4, 5, 6 and 7, in some embodiments, the sound absorber 3 includes 2N sound absorbing structures 33, where N ≧ 1 and N is a positive integer. The plurality of sound-absorbing walls 332 of each sound-absorbing structure 33 are symmetrically arranged along the direction-changing wall 331. Arranged in this way, the structure of the sound absorber 3 is simpler and more advantageous for production and manufacture.

Referring to fig. 4, 5, 6 and 7, for example, the sound-absorbing structure 33 may be any one of 2, 4, 6 and 8, which may be selected according to actual situations, and this disclosure does not specifically limit this.

Referring to fig. 10, in some embodiments, each sound absorber 3 is provided with a plurality of sound channels 32, the plurality of sound channels 32 includes at least a first sound channel 322 and a second sound channel 323, and the width of the first sound channel 322 is greater than the width of the second sound channel 323. That is, each sound absorber 3 includes at least two kinds of sound wave channels 32 different in width. Since the central sound absorption frequency of the sound absorber 3 is related to the width of the sound wave channel 32, each sound absorber 3 is provided with the sound wave channels 32 with different widths, so that one sound absorber 3 can have different central sound absorption frequencies, and the noise reduction effect of a multi-frequency band is realized.

Referring to fig. 10, the sound absorber 3 is illustratively provided with a plurality of sound wave channels 32, and the plurality of sound wave channels 32 are different in width. Arranged in this way, each sound wave channel 32 corresponds to a central sound absorption frequency, which can further expand the sound absorption frequency band of the sound absorber 3 and improve the sound absorption effect of the sound absorber 3.

It should be noted that the width of the acoustic channel 32 can be reduced by increasing the thickness of the side wall of the acoustic channel 32; increasing the width of the acoustic channel 32 is achieved by reducing the thickness of the side walls of the acoustic channel 32.

Referring to fig. 11, in some embodiments, each sound absorber 3 is provided with a plurality of sound wave channels 32, the plurality of sound wave channels 32 includes at least a third sound wave channel 324 and a fourth sound wave channel 325, and the length of the third sound wave channel 324 is greater than the length of the fourth sound wave channel 325. That is, each sound absorber 3 includes at least two kinds of sound wave passages 32 different in length. Because the central sound absorption frequency of the sound absorption piece 3 is related to the length of the sound wave channel 32, each sound absorption piece 3 is provided with the sound wave channels 32 with different lengths, and one sound absorption piece 3 can also have different central sound absorption frequencies, so that the noise reduction effect of a multi-frequency band is realized.

Referring to fig. 11, the sound absorber 3 is illustratively provided with a plurality of sound wave passages 32, and the plurality of sound wave passages 32 are different in length. Arranged in this way, each sound wave channel 32 corresponds to a central sound absorption frequency, which can further expand the sound absorption frequency band of the sound absorber 3 and improve the sound absorption effect of the sound absorber 3.

It should be noted that the length of the acoustic channel 32 can be adjusted by changing the extending direction of the acoustic channel 32.

Referring to fig. 12, in some embodiments, each sound absorber 3 is provided with a plurality of sound wave channels 32, the plurality of sound wave channels 32 including at least a fifth sound wave channel 326 and a sixth sound wave channel 327. Wherein the width of the fifth acoustic channel 326 is greater than the width of the sixth acoustic channel 327, and the length of the fifth acoustic channel 326 is less than the width of the sixth acoustic channel 327. With this arrangement, it is also possible to realize one sound absorbing member 3 having a plurality of different central sound absorbing frequencies, thereby realizing a noise reduction effect in multiple frequency bands.

It should be noted that the width of the acoustic wave channel 32 can be reduced by increasing the thickness of the side wall of the acoustic wave channel 32, and the width of the acoustic wave channel 32 can be increased by reducing the thickness of the side wall of the acoustic wave channel 32. In addition, the length of the acoustic wave channel 32 can be adjusted by changing the extending direction of the acoustic wave channel 32.

Referring to fig. 1, in some embodiments, a range hood 100 includes a plurality of sound absorbers 3, and the plurality of sound absorbers 3 includes at least one first sound absorber, at least one second sound absorber, and at least one third sound absorber. At least one first sound absorption piece is arranged between the air suction port 11 and the fan 2, at least one second sound absorption piece is arranged between the exhaust port 12 and the fan 2, and at least one third sound absorption piece is arranged between the fan 2 and the side wall of the air duct 13.

Wherein, the sound absorption member 3 comprises a top plate 35 and a bottom plate 34, and the top plate 35 and the bottom plate 34 are respectively fixedly connected with two opposite side walls of the casing 1.

It can be understood that, when the range hood 100 is in operation, at the air suction port 11 and the air exhaust port 12 of the range hood 100, the air flow easily collides with the casing 1 and generates turbulence, so as to generate large turbulent noise. In addition, the fan 2 generates strong noise when operating.

Based on this, the first sound absorbing piece is arranged between the air suction port 11 and the fan 2, so that turbulent noise generated at the air suction port 11 can be effectively absorbed; the second sound absorption piece is arranged between the air outlet 12 and the fan 2, so that turbulent flow noise generated at the air outlet 12 can be effectively absorbed; the third sound absorption piece is arranged between the fan 2 and the side wall of the air duct 13, so that noise generated when the fan 2 operates can be effectively absorbed. Therefore, better noise reduction effect can be realized, and the noise generated by the range hood 100 in operation can be fully reduced.

Referring to fig. 1, in some embodiments, the first sound absorbing member, the second sound absorbing member and the third sound absorbing member have the same structure, so that only a plurality of sound absorbing members 3 with the same specification need to be arranged in the range hood 100. Therefore, the production process can be simplified, and the production efficiency can be improved; and the sound absorption piece 3 is convenient to maintain and replace at the later stage.

It should be noted that, in the sound absorbers 3 with the same specification, each sound absorber 3 may have only one central sound absorption frequency, or may have multiple central sound absorption frequencies, which may be specifically selected according to actual situations, and the disclosure is not limited specifically herein.

Referring to fig. 1, in other embodiments, the first, second and third sound absorbers are all of different construction. In this way, the frequencies of the noises at the positions where the first, second and third sound-absorbing members are disposed can be respectively detected, so that the sound-absorbing members 3 with different structures are respectively selected for each position in a targeted manner, and the noises generated by the range hood 100 during operation are effectively reduced.

Referring to fig. 1, in some embodiments, the first sound absorber is structurally identical to the second sound absorber and structurally different from the third sound absorber. Wherein the first sound absorbing member and the second sound absorbing member have the same central sound absorbing frequency and only have one central sound absorbing frequency; the third sound absorber likewise has only one central sound absorption frequency, which is different from the central sound absorption frequencies of the first and second sound absorbers.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A range hood, characterized by comprising:

the air conditioner comprises a shell, a fan and a control device, wherein an air suction port and an air exhaust port are arranged on the shell, and an air duct is formed between the air suction port and the air exhaust port;

the fan is arranged in the air duct, and the airflow introduced by the fan enters the air duct through the air suction port and is discharged from the air exhaust port;

the sound absorption piece is arranged in the air duct, and a resonant cavity and at least one sound wave channel are arranged in the sound absorption piece; one end of the sound wave channel is communicated with the resonant cavity, and the other end of the sound wave channel is communicated with the air channel; the resonant cavity is configured to resonate with acoustic waves entering the resonant cavity.

2. The range hood of claim 1, wherein the acoustic channel comprises a plurality of sub-acoustic channels, and the plurality of sub-acoustic channels are connected in sequence; each of the sub acoustic channels is configured such that acoustic wave energy entering the sub acoustic channel creates friction with a side wall of the sub acoustic channel;

wherein the port of each of the sub acoustic channels has a first axis that is perpendicular to a plane in which the port is located; and the first axes of the ports of at least one group of two connected sub-acoustic channels intersect.

3. The range hood according to claim 2, wherein the plurality of sub-acoustic channels include a plurality of curved sub-channels and a plurality of linear sub-channels, the plurality of curved sub-channels are alternately connected with the plurality of linear sub-channels one by one, and a first axis of a port of the curved sub-channel connected with the linear sub-channel is perpendicular to a first axis of a port of the linear sub-channel connected with the curved sub-channel.

4. The range hood of claim 3, wherein the sound absorber comprises a plurality of sound wave channels, and the sound wave channels are arranged along the circumferential direction of the resonant cavity;

the plurality of curved sub-channels are arranged along the circumferential direction of the resonant cavity, and the plurality of linear sub-channels are arranged along the radial direction of the resonant cavity.

5. The range hood of claim 4, wherein the lengths of the curved sub-channels are gradually shortened along the circumferential direction of the sound absorbing member and toward the resonant cavity; and/or the lengths of the plurality of linear sub-channels are equal.

6. The range hood of claim 4 or 5, wherein the sound absorber comprises:

at least two sound-absorbing structures, each sound-absorbing structure comprising a deflecting wall and a plurality of sound-absorbing walls, wherein the deflecting wall is arranged along the radial direction of the resonant cavity, and the sound-absorbing walls are arranged along the circumferential direction of the resonant cavity;

the sound-absorbing walls of every two adjacent sound-absorbing structures are staggered, and the curved sub-channel is formed between the sound-absorbing wall of one sound-absorbing structure and the sound-absorbing wall of the other sound-absorbing structure in the two adjacent sound-absorbing structures; the end part of the sound absorbing wall of one sound absorbing structure in the two adjacent sound absorbing structures and the direction changing wall of the other sound absorbing structure form the linear sub-channel.

7. The range hood of claim 6, wherein the sound absorbing member comprises 2N sound absorbing structures, wherein N is greater than or equal to 1, and N is a positive integer; and a plurality of sound absorbing walls of each sound absorbing structure are symmetrically arranged along the direction-changing wall.

8. The range hood of claim 1, wherein the width of the acoustic channel is substantially equal, and the width of the acoustic channel is less than or equal to 1 mm.

9. The range hood of claim 1, wherein each of the sound absorbers has a plurality of sound channels, the plurality of sound channels at least includes a first sound channel and a second sound channel, and a width of the first sound channel is greater than a width of the second sound channel.

10. The range hood of claim 1, comprising a plurality of sound absorbers, the plurality of sound absorbers comprising at least one first sound absorber, at least one second sound absorber, and at least one third sound absorber;

the at least one first sound absorbing piece is arranged between the air suction port and the fan, the at least one second sound absorbing piece is arranged between the air exhaust port and the fan, and the at least one third sound absorbing piece is arranged between the fan and the side wall of the air duct.