CN109340192B

CN109340192B - Fume exhaust fan

Info

Publication number: CN109340192B
Application number: CN201811130390.9A
Authority: CN
Inventors: 程繁华; 行晓亮; 张薇
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2021-05-25
Anticipated expiration: 2038-09-27
Also published as: CN109340192A

Abstract

The invention discloses a range hood, which comprises: the smoke guide hood is provided with a smoke inlet communicated with the airflow driving module; the baffle with it is relative to advance the mouth, just the baffle with the passageway of advancing the cigarette has between the smoke guide cover, wherein, the baffle with be equipped with between the smoke guide cover and fall the structure of making an uproar. According to the range hood provided by the embodiment of the invention, the noise reduction effect is good.

Description

Fume exhaust fan

Technical Field

The invention relates to the field of kitchen electricity, in particular to a range hood.

Background

In the product development process of the range hood, the larger the air volume and the air pressure are, the noise is developed towards the direction of silence. Except for the measures of optimizing the air duct in the aspect of silence, modes such as active silencing, passive silencing and the like are gradually applied to the range hood. The air duct optimization is a better way in the noise reduction aspect, mainly has little influence on the performance of the fan, but generally has ideal effect on noise reduction.

In the near-suction type oil fume suction, most volutes can be directly connected with a guide plate or other rectifying devices, so that cyclone generated by the fume can be reduced, and meanwhile, in the structure of the prior technical scheme, the structure is provided with a condensing plate structure, so that the effects of expanding a negative pressure area and separating the fume are mainly achieved; but the space structure of the inlet air is not fully utilized for noise reduction.

The condensing plate is mainly used for enlarging the smoking effect in the prior art, but is a drawback of noise increase in the aspect of noise, and due to the fact that the path of airflow is influenced by the condensing plate, airflow smoothness is reduced, the possibility that air inlet generates vortex is increased, air inlet noise is increased, and the use feeling of a user on the range hood is reduced.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide the range hood which is good in noise reduction effect.

According to the embodiment of the invention, the range hood comprises: the smoke guide hood is provided with a smoke inlet communicated with the airflow driving module; the baffle with it is relative to advance the mouth, just the baffle with it has the passageway of advancing the cigarette between the smoke guide cover, wherein, the baffle with be equipped with between the smoke guide cover and fall the structure of making an uproar.

According to the range hood provided by the embodiment of the invention, the noise reduction effect is good.

In addition, the range hood according to the above embodiment of the present invention may further have the following additional technical features:

in some embodiments, the noise reducing structure includes at least one layer of acoustical panel disposed between the baffle and the smoke guide shroud, and the acoustical panel has acoustical holes therein.

In some embodiments, the noise reducing structure includes a first acoustical panel disposed on a back surface of the baffle plate, with a cavity formed between the first acoustical panel and the baffle plate.

In some embodiments, sound absorbing material is added to the cavity formed between the first sound absorbing panel and the baffle.

In some embodiments, the peripheral edge of the first sound-attenuating panel is connected to the baffle plate, and the first sound-attenuating panel is gradually raised relative to the baffle plate in a direction from the peripheral edge to the center to form the cavity.

In some embodiments, at least a portion of the peripheral edge of the baffle is provided with a flange, and at least a portion of the peripheral edge of the first sound-absorbing panel is embedded in the flange.

In some embodiments, the first sound-attenuating panel is disposed at an intermediate position of the baffle.

In some embodiments, the noise reducing structure further comprises a second sound attenuating plate disposed adjacent the smoke guide hood, the second sound attenuating plate being disposed in a direction encircling an axis of the smoke inlet.

In some embodiments, the second sound-absorbing panel is hollow and gradually shrinks along the air intake direction.

In some embodiments, the second sound attenuating panel is spaced apart from the smoke guide hood by a predetermined distance.

In some embodiments, the second sound attenuating panel is spaced from the smoke guide shroud by more than 20 millimeters.

In some embodiments, the noise reducing structure includes first and second noise reducing plates disposed at intervals in a direction from the baffle plate to the smoke guide hood, the first noise reducing plate is provided on a back surface of the baffle plate, a cavity is formed between the first noise reducing plate and the baffle plate, the second noise reducing plate is provided adjacent to the smoke guide hood, and the second noise reducing plate is arranged in a direction around an axis of the smoke inlet.

In some embodiments, the spacing between the first and second sound attenuating panels is in the range of 40mm to 60 mm.

In some embodiments, the acoustical panel has a perforation rate in the range of 1% to 5%; and/or the perforated aperture of the acoustical panel is within 2 millimeters; and/or the thickness of the sound attenuation plate is within 2 mm.

In some embodiments, a support rod is disposed on the housing, and at least a portion of the sound absorbing plate and the baffle are connected to the support rod.

Drawings

Fig. 1 is a schematic view of a range hood according to one aspect of the present invention.

Fig. 2 is a sectional view of the range hood shown in fig. 1.

Fig. 3 is a cut-away partial perspective view of the range hood shown in fig. 1.

Fig. 4 is a bottom view of a range hood according to an embodiment of the present invention.

FIG. 5 is a schematic view of the baffle plate and noise reduction structure in accordance with one embodiment of the present invention.

Fig. 6 is a sectional view in the direction of section a-a of fig. 5.

FIG. 7 is a sectional view in the direction of section B-B of FIG. 5

Reference numerals: the range hood 100, the body 1, the frame bounding wall 11, the frame front panel 12, the operating panel 13, the airflow driving module 14, the volute 141, the impeller 142, the motor 143, the check valve 15, the connecting structure, the support rod 16, the smoke guide cover 17, the smoke inlet 101, the baffle 2, the flanging 21, the noise reduction structure 3, the first silencing plate 31 and the second silencing plate 32.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the invention and are not to be construed as limiting the invention.

Referring to fig. 1 to 3, a range hood 100 according to an embodiment of the present invention includes: a body 1 and a baffle 2.

The machine body 1 is internally provided with an airflow driving module 14 and a smoke guide hood 17, the smoke guide hood 17 is provided with a smoke inlet 101 communicated with the airflow driving module 14, negative pressure is generated at the smoke inlet 101 of the smoke guide hood 17 under the driving action of the airflow driving module 14, and smoke is conveyed to the smoke inlet 101 along the smoke guide hood 17 under the action of the negative pressure and then is sent out after being processed in the machine body 1. The baffle plate 2 is opposite to the smoke inlet 101, and a smoke inlet passage is arranged between the baffle plate 2 and the smoke guide cover 17, smoke is blocked by the baffle plate 2, enters the smoke inlet passage along the periphery of the baffle plate 2, and is conveyed to the smoke inlet 101.

Wherein, be equipped with between baffle 2 and the guide fume cover 17 and fall the structure 3 of making an uproar, the flue gas can be carried out the amortization when falling the structure 3 of making an uproar to realize the purpose of amortization and falling the noise, reduce the noise in the 100 working processes of lampblack absorber effectively.

According to the range hood 100 provided by the embodiment of the invention, due to the arrangement of the noise reduction structure 3, in the process of passing smoke through noise reduction, noise generated in the smoke circulation process can be eliminated, so that the purposes of noise reduction and noise reduction are achieved, and the range hood runs in a relatively silent environment and provides a good running environment for the range hood.

It should be noted that, because a part of the smoke guide hood is at the smoke inlet, the space between the baffle plate 2 and the smoke inlet should also be understood as the space between the baffle plate 2 and the smoke guide hood.

The noise reduction structure 3 of the present invention may have various forms, for example, the noise of the range hood 100 may be effectively reduced by the noise reduction structure 3 such as a sponge. In addition, other noise reducing structures 3 may be used, such as perforated plates, silencers, and the like. The present invention will be described mainly by taking the use of orifice plate silencing as an example.

With reference to fig. 2-7, the noise reducing structure 3 comprises at least one layer of sound absorbing sheet arranged between the baffle 2 and the fume guiding cover 17, and the sound absorbing sheet has sound absorbing holes. When the airflow passes through the space between the baffle plate 2 and the fume guiding hood 17, partial silencing in the airflow circulation process is eliminated, so that the noise can be effectively reduced.

In addition, the acoustical panel included in the noise reduction structure 3 may be a single layer or multiple layers, and multiple layers of acoustical panels may be combined to form a hollow chamber, or may be matched with other structures to form a hollow cavity, for example, combining the acoustical panel with the baffle 2 to form a hollow cavity, or combining the acoustical panel with the smoke guide cover 17 to form a hollow cavity.

For example, with reference to fig. 2, 3 and 6 and 7, in some embodiments of the invention, the noise reducing structure 3 comprises a first sound-attenuating plate 31 disposed on the rear face of the baffle plate 2, with a cavity formed between the first sound-attenuating plate 31 and the baffle plate 2. The rear surface of the baffle 2 is a surface of the baffle 2 facing the smoke inlet 101.

When the airflow enters the smoke inlet 101 through the space between the baffle plate 2 and the smoke guide hood 17, the airflow will pass through the first silencing plate 31, a part of the airflow passing through the first silencing plate 31 will enter the cavity between the first silencing plate 31 and the baffle plate 2, and as the airflow enters a larger space after passing through the silencing holes, the volume of the smoke is increased, and the energy of the airflow can be weakened by the expansion of the gas, so that the noise is reduced.

Preferably, a sound-absorbing material, such as a sponge or the like, may be added to the cavity formed between the first sound-absorbing panel and the baffle. The sound-absorbing material disposed between the first sound-absorbing plate and the baffle plate may fill the entire cavity, or may fill a part of the space between the first sound-absorbing plate and the baffle plate with the sound-absorbing material. The sound-absorbing material also belongs to a part of the noise reduction structure, and of course, the sound-absorbing material is not arranged in the cavity, so that the sound-absorbing structure also has a good noise reduction effect.

Further, with reference to fig. 1, 2 and 6 and 7, the peripheral edge of the first sound-deadening plate 31 is connected to the baffle plate 2, and the first sound-deadening plate 31 is gradually raised in the direction from the peripheral edge to the center with respect to the baffle plate 2 to form a cavity. When the air current circulates along first acoustical panel 31, because first acoustical panel 31 is protruding from the periphery to the center subassembly, the air current will also flow along first acoustical panel 31 to with the air current towards smoke inlet 101 water conservancy diversion, improve the water conservancy diversion effect to the flue gas, improve gaseous circulation efficiency effectively, moreover, make the air current steady, the noise of production is little.

Preferably, with reference to fig. 5, at least a portion of the peripheral edge of the baffle 2 is provided with a turned-up edge 21, and at least a portion of the peripheral edge of the first sound-deadening plate 31 is embedded in the turned-up edge 21. So that the baffle plate 2 and the first sound-deadening plate 31 can be stably joined together.

The flange 21 of the peripheral edge of the baffle 2 may be formed by bending the edge of the baffle 2, or the baffle 2 may be fixedly connected with the flange 21 to form the flange 21, or of course, the baffle may be formed in other manners, for example, by punching a part of the baffle 2 to form the flange 21.

In addition, the peripheral edge of the baffle 2 may form a ring-shaped turned-over edge 21 structure, or a part of the peripheral edge of the baffle 2 may form the turned-over edge 21 structure, for example, the baffle 2 is a horizontally arranged quadrangular plate shape, and the turned-over edges 21 may be formed on the left and right sides of the baffle 2, so that the first sound-absorbing panel 31 may be conveniently mounted on the baffle 2.

Preferably, the peripheral edge of the first sound-absorbing plate 31 is formed with a corresponding flanged structure, and this structure of the peripheral edge of the first sound-absorbing plate 31 can be fitted inside the structure of the flange 21.

In addition, the relative position between the first sound-absorbing plate 31 and the baffle plate 2 in the present invention may be rotated according to the actual use, for example, referring to fig. 7, the first sound-absorbing plate 31 is attached to the peripheral edge of the baffle plate 2; referring to fig. 6, the first sound-deadening plate 31 may be attached to the intermediate position of the screen 2. Of course, it is also possible to wrap the baffle plate 2 with the first sound-deadening plate 31 with a portion of the first baffle plate 2 between the baffle plate 2 and the hood 17.

In addition, it should be noted that, in the present invention, the middle position of the baffle plate refers to the middle of the baffle plate along the predetermined direction, for example, taking a horizontally disposed baffle plate as an example, the middle position of the baffle plate may include: the middle position of the baffle plate along the left-right direction; or the middle position of the baffle plate along the front-back direction; or the middle position of the baffle along the front-back direction and the left-right direction; or an intermediate position on the baffle in the other direction.

With reference to fig. 1 to 7, in some embodiments of the invention, the noise reducing structure 3 further comprises a second sound-deadening plate 32 disposed adjacent to the smoke guide hood 17, and the second sound-deadening plate 32 is arranged in a direction surrounding the axis of the smoke inlet 101. The noise reduction structure 3 can be formed at a position adjacent to the smoke guide cover 17, thereby playing a role of noise reduction.

In addition, in the gas circulation process, the edge gas flow of the fluid is easy to generate turbulence, so that noise is generated, therefore, the first silencing plate 31 and the second silencing plate 32 can be arranged at the same time, at least part of the smoke passes through the space between the first silencing plate 31 and the second silencing plate 32, the noise generated in the smoke circulation process can be effectively reduced, the noise can be effectively reduced, and the effects of silencing and reducing noise can be improved.

Further, the second sound-deadening plate 32 is hollow and gradually contracts in the air intake direction. Is convenient for guiding the flue gas.

Advantageously, the second sound-deadening plate 32 is spaced apart from the hood 17 by a predetermined distance, preferably a spacing between the second sound-deadening plate 32 and the hood 17 of more than 20 mm. That is, the distance between the first sound-deadening plate 31 and the hood 17 may be 20mm, 25 mm, 30 mm, 50 mm, 150 mm, or the like.

Of course, the gap between the second sound-deadening plate 32 and the hood 17 in the present invention is not limited to this, and the gap between the second sound-deadening plate 32 and the hood 17 may be set to be smaller than 20mm, for example, 0mm, 5 mm, 15 mm, or the like.

In addition, a cavity may be formed between the second sound-deadening plate 32 and the smoke guide cover 17, and this cavity may also be in a shape in which the space on both sides (both sides in the air intake direction) of the internal space is large and the space is small, or may also be in a shape in which the spaces are uniform or nonuniform in other forms, and if the sound-deadening holes are not considered, the cavity between the second sound-deadening plate 32 and the smoke guide cover 17 may be a closed cavity, or may also be an open cavity.

As shown in fig. 1 to 7, in some embodiments of the present invention, the noise reducing structure 3 includes a first sound-deadening plate 31 and a second sound-deadening plate 32, the first sound-deadening plate 31 and the second sound-deadening plate 32 being disposed at a distance in a direction from the baffle plate 2 to the hood 17, the first sound-deadening plate 31 being provided on the back surface of the baffle plate 2, the first sound-deadening plate 31 and the baffle plate 2 forming a hollow space therebetween, the second sound-deadening plate 32 being disposed adjacent to the hood 17, and the second sound-deadening plate 32 being disposed in a direction around the axis of the smoke inlet 101. Thereby further improving the effects of smoke guiding and sound attenuation.

In addition, other sound-absorbing plates may be disposed between the first sound-absorbing plate 31 and the second sound-absorbing plate 32, for example, a single sound-absorbing plate may be disposed between the first sound-absorbing plate 31 and the second sound-absorbing plate 32; or a plurality of sound-deadening plates may be provided between the first sound-deadening plate 31 and the second sound-deadening plate 32. Wherein all the sound-absorbing plates may be arranged to extend in the direction from the baffle plate 2 to the smoke guide hood 17, or the sound-absorbing plates may be arranged to extend normal in the direction from the baffle plate 2 to the smoke guide hood 17.

Preferably, the spacing between the first 31 and second 32 acoustic panels is in the range 40mm to 60 mm. For example, the spacing between the first and second sound-deadening

plates

31 and 32 may be 40mm, 43 mm, 56 mm, 60mm, or the like. Of course, the distance between the first and second sound-deadening

plates

31 and 32 in the present invention may be larger than 60mm or smaller than 40mm, for example, the distance between the first and second sound-deadening

plates

31 and 32 is set to 0mm, 30 mm, 70 mm, or the like, and the first and second sound-deadening

plates

31 and 32 may be combined together so that a cavity closed on both sides in the air intake direction is formed between the first and second sound-deadening

plates

31 and 32.

The distance in the present invention means the minimum distance between the first and

second muffling plates

31, 32, for example, the distance between the first and

second muffling plates

31, 32 means the minimum distance between the first and

second muffling plates

31, 32.

Preferably, the spacing in the present invention is also understood to be the spacing of the corresponding positions between the two, taking as an example the spacing between the first and second

acoustic panels

31 and 32 between 40 and 60 millimetres, it being understood that the spacing between any point of the first acoustic panel 31 and the corresponding position on the second acoustic panel 32 is between 40 and 60 millimetres.

The corresponding positions may be positions opposite to each other along a direction parallel to the axis of the smoke inlet 101, or positions opposite to each other in a direction perpendicular to the sound-absorbing panel, or other corresponding relationships.

Advantageously, the first and second sound-absorbing

plates

31, 32 may be arranged parallel to each other, or the first and second sound-absorbing

plates

31, 32 may be arranged with an angle therebetween.

In addition, the above explanation of the distance between the first sound-deadening plate 31 and the second sound-deadening plate 32 is also applied to the explanation of the distance between the second sound-deadening plate 32 and the hood 17.

Of course, the above explanation of the spacing is only a few specific embodiments of the present invention, and is not intended to limit the scope of the present invention.

In some embodiments of the invention, the acoustical panel has a perforation rate in the range of 1% to 5%. In other words, the ratio of the total area of all the sound-deadening holes to the area of the sound-deadening plate is in the range of 1% to 5%.

The hole diameter of the through hole of the sound-absorbing plate is within 2mm, the through hole (sound-absorbing hole) on the sound-absorbing plate can be in other non-circular shapes, and the maximum width of the sound-absorbing hole can be set within 2 mm.

In addition, in the invention, the thickness of the noise reduction plate is within 2 mm. The reasonable arrangement of the thickness of the silencing plate, the perforation rate of the silencing plate and the perforation hole diameter on the silencing plate has a remarkable promoting effect on silencing and noise reduction of the invention, the description of the dimensional relationship is only a specific embodiment of the invention and is not a limitation on the protection scope of the invention, for example, the perforation rate of the silencing plate can be set within the range of less than 1% or more than 5%; the aperture of the perforations of the sound-absorbing plate can also be set to be larger than 2 mm; the thickness of the noise reduction plate may be set to be greater than 2 mm.

In some embodiments of the invention, the body 1 is provided with a support bar 16, and at least a portion of the sound-damping panel and the baffle 2 are connected to the support bar 16. Through setting up bracing piece 16, can make things convenient for the fixed of baffle 2 and acoustical panel, of course, can have bracing piece 16 fixed with whole acoustical panels, also can adopt other modes to fix at least some acoustical panels, for example, through modes such as welding, screw connection, bolted connection, buckle connection, can also be fixed on baffle 2, on leading petticoat pipe 17 with the acoustical panel.

Referring to fig. 1 to 3, in some embodiments of the present invention, the smoke inlet 101 is opened downward, and the baffle 2 is located right below the smoke inlet 101.

The range hood 100 disclosed by the invention can reduce the problem of large noise of the range hood 100, improve the fluency of airflow and reduce eddy.

Referring to fig. 1 to fig. 3, a side sectional view of the range hood 100 mechanism is shown, which includes a frame front plate 12, an operation panel 13, a smoke guide hood 17, a noise reduction structure 3, a connection structure of the noise reduction structure 3 and the range hood 100, a frame shroud 11, a volute 141, an impeller 142, a motor 143, and a check valve 15.

In fig. 2, the volute 141, the impeller 142 and the motor 143 form a centrifugal fan structure of the most main core of the range hood 100, and the frame front plate 12, the frame enclosure plate 11, the control panel, the smoke guide cover 17 and the like form a frame of the range hood 100.

When the range hood 100 is powered on, the motor 143 rotates to drive the impeller 142 to rotate to generate a suction force, so that the smoke outside the air inlet can enter the volute 141 through the noise reduction structure 3, and the smoke is separated and discharged from the check valve 15 through the centrifugal rotation of the impeller 142.

The invention mainly relates to a noise reduction structure 3 arranged at an air inlet at the lower part of a range hood, which can enable an air flow path of inlet air to be provided with a perforated plate, noise can be reduced in the air inlet process through the noise elimination and noise reduction effects of the perforated plate, meanwhile, the added perforated plate channel prolongs an air inlet channel, and the airflow is guided through the extended air inlet channel, so that the noise reduction effect is enhanced.

Fig. 5 and 6 are a front view and a cross-sectional view of the noise reduction structure 3, respectively, the noise reduction structure 3 mainly has a condensation plate (i.e., a baffle 2), a lower perforated plate (i.e., a first noise reduction plate 31) and an upper perforated plate (i.e., a second noise reduction plate 32), wherein a channel between the upper perforated plate and the lower perforated plate is an air inlet channel, the lower perforated plate is clamped on the condensation plate through a clamping groove, the upper perforated plate is connected with the condensation plate through a long bolt connection structure and is fixed on the range hood 100, the upper perforated plate is above the lower perforated plate, and the relative positions of the centers of the upper perforated plate and the lower perforated plate.

For the perforated plate structure, the perforation rate of the perforated plate is 1-5%, the aperture size of the perforated plate is within 2mm, the thickness of the perforated plate is within 2mm, the distance between the upper perforated plate and the lower perforated plate is 40-60 mm, and the noise reduction effect is optimal.

Because the negative pressure area needs to be enlarged and the smoking effect is enhanced, a certain airflow channel needs to be arranged between the upper perforated plate and the smoke guide cover 17, and the distance between the channels is more than 20 mm;

the invention can lead the air inlet to be smoother and reduce the vortex noise through the flow guiding function of the structure. The air flow is uniformly dispersed through the perforated plate with the structure, and the noise is reduced by adopting the silencing effect of the perforated plate on the condensing plate;

the perforated plate of the noise reduction structure 3 can be a curved surface structure and is a smooth curved surface for optimizing flow guiding as far as possible, and the streamline perforated plate can play a more effective flow guiding role so as to reduce noise;

the noise reduction structure 3 mentioned in the technical scheme has a connection mode that the noise reduction structure is fixedly connected to the bottom of the range hood 100 through bolts, other connection modes can achieve the same effect, and particularly, the noise reduction structure is connected through a liftable connection mode, and a better effect can be achieved by lifting or lowering the connection structure of the condensation plate and the perforated plate at different gears;

in the technical scheme, the lower perforated plate and the condensation wall are added with sound absorption cotton to improve the noise reduction effect;

the invention is provided with a noise reduction structure 3 at the air inlet, the noise reduction structure 3 can be a noise elimination and noise reduction structure 3 consisting of a perforated plate and a condensation plate, the noise reduction structure 3 can prolong an air inlet channel, and the perforated plate noise elimination structure and a flow guide function structure are arranged on the channel.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, 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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise explicitly specified or limited, a first feature may be "on" or "under" a second feature in direct contact with the first and second features, or in indirect contact with the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A range hood, comprising:

the smoke guide hood is provided with a smoke inlet communicated with the airflow driving module;

the baffle plate is opposite to the smoke inlet, a smoke inlet channel is arranged between the baffle plate and the smoke guide cover,

wherein, the baffle with it makes an uproar structure to fall to be equipped with between the leading petticoat pipe, fall the structure of making an uproar including arrange in the baffle with at least one deck acoustical panel between the leading petticoat pipe, just the acoustical panel is last to have the acoustical hole, it includes first acoustical panel and second acoustical panel to fall the structure of making an uproar, first acoustical panel with the second acoustical panel is along following the baffle arrives leading the direction interval of petticoat pipe sets up.

2. The range hood according to claim 1, wherein the first sound-absorbing plate is arranged on the back surface of the baffle plate, and a cavity is formed between the first sound-absorbing plate and the baffle plate.

3. A range hood as set forth in claim 2, characterized in that the peripheral edge of said first sound-deadening plate is connected to said baffle plate, and said first sound-deadening plate is gradually raised with respect to said baffle plate in a direction from the peripheral edge toward the center to form said cavity.

4. A range hood as claimed in claim 3, characterized in that at least a part of the peripheral edge of the baffle is provided with a turned-over edge, and at least a part of the peripheral edge of the first sound-absorbing plate is embedded in the turned-over edge.

5. A range hood as set forth in claim 2 wherein said first sound-attenuating panel is disposed intermediate said baffle.

6. A range hood as set forth in claim 2, wherein a sound absorbing material is added to the cavity formed between the first sound absorbing plate and the baffle plate.

7. A range hood as set forth in claim 1 wherein said second sound-deadening sheet is disposed adjacent to said smoke guide hood and said second sound-deadening sheet is disposed in a direction surrounding an axis of said smoke inlet.

8. A range hood as set forth in claim 1 wherein said second sound attenuating panel is hollow and gradually contracts in the direction of the incoming air.

9. A range hood as set forth in claim 1 wherein said second sound attenuating panel is spaced a predetermined distance from said smoke guide shroud.

10. A range hood as set forth in claim 9 wherein said second sound attenuating panel is spaced from said smoke guide shroud by a distance of greater than 20 millimeters.

11. A range hood as set forth in claim 1 wherein the spacing between said first and second sound-absorbing panels is in the range of 40mm to 60 mm.

12. A range hood according to any of the claims 1-11,

the perforation rate of the sound-absorbing plate is in the range of 1% to 5%; and/or

The aperture of the perforation of the sound-absorbing plate is within 2 mm; and/or

The thickness of the noise reduction plate is within 2 mm.

13. A range hood as claimed in claim 1, wherein a support rod is provided on the body, and at least a portion of the sound-absorbing panel and the baffle are connected to the support rod.