CN218993486U - Air inlet assembly and range hood with same - Google Patents

Abstract

The utility model discloses an air inlet assembly and a range hood with the same, wherein the air inlet assembly comprises: the fume collecting hood is provided with a first air inlet; the air duct component is positioned in the fume collecting hood, a second air inlet is formed in the air duct component, and the air inlet component forms a first negative pressure cavity at the second air inlet; the noise reduction negative pressure assembly is positioned in the smoke collecting hood and comprises a partition plate, the partition plate is arranged opposite to the first air inlet, and the air inlet assembly forms a second negative pressure cavity between the partition plate and the first air inlet. The air duct component is provided with a first silencing structure, and the noise reduction negative pressure component is provided with a second silencing structure. According to the air inlet assembly provided by the embodiment of the utility model, the noise reduction negative pressure assembly is arranged to form the second negative pressure cavity, so that the smoking capability is improved. At least two silencing structures are utilized to reduce noise of the smoke machine.

Description

Air inlet assembly and range hood with same

Technical Field

The utility model relates to the field of kitchen appliances, in particular to an air inlet assembly and a range hood with the same.

Background

The range hood is an indispensable kitchen appliance in families at present, the capability of absorbing oil smoke is an important index for measuring the quality of the range hood, the noise of the range hood is also an important index for influencing the use experience, and the two indexes are difficult to be compatible in actual products.

For example, in order to improve the smoking effect of the range hood when a user cooks, most range hoods adopt to increase the air quantity of products to enhance the smoking capability. However, the increased air volume of the range hood can cause the problems that the power of a used motor is increased or the size specification of an impeller air channel is increased, and the noise is increased when the air volume is large. The range hood not only affects user experience due to high noise, but also increases the cost of the range hood product due to increased motor power and impeller air duct size specification, and the overall appearance of the range hood is also increased in size.

With the improvement of living standard of people, users pay more and more attention to the matching effect of kitchen appliances and kitchen decoration environment when selecting kitchen appliances, so that products with smaller overall size or thinner body are favored when selecting the range hood. However, the range hood with small size or thin body has the problems that the performance of the range hood is difficult to improve, and particularly the noise is large.

In the prior art, a side-suction type range hood is thinner than other types of range hoods. In the scheme, the smoke baffle plate is arranged on the fan pipeline assembly, so that a negative pressure cavity for gathering smoke is formed between the fan pipeline assembly and the outer inlet of the smoke machine. This solution, while capable of enhancing the smoking capacity of the engine, has significant drawbacks in terms of noise reduction.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the air inlet assembly, which can greatly reduce noise while guaranteeing the smoking capability.

The utility model also aims to provide the range hood with the air inlet assembly.

An air intake assembly according to an embodiment of the present utility model includes: the exhaust fume collecting hood is provided with a first air inlet; the air duct assembly is positioned in the fume collecting hood, a second air inlet is formed in the air duct assembly, and the air inlet assembly forms a first negative pressure cavity at the second air inlet; the noise reduction negative pressure assembly is positioned in the smoke collecting cover and comprises a partition plate, the partition plate is arranged opposite to the first air inlet, and the air inlet assembly forms a second negative pressure cavity between the partition plate and the first air inlet; the air duct assembly is provided with a first silencing structure, and the noise reduction negative pressure assembly is provided with a second silencing structure.

According to the air inlet assembly provided by the embodiment of the utility model, the noise reduction negative pressure assembly is arranged in the fume collecting hood, the second negative pressure cavity is separated by the partition plate, and the noise reduction negative pressure assembly is not required to be too thick, so that excessive space occupation is avoided. The second negative pressure cavity is favorable for gathering smoke before the smoke is sucked into the air duct component in the smoke collecting cover, so that smoking performance is improved, and smoke leakage is reduced. The first silencing structure arranged on the air duct component and the second silencing structure arranged on the noise reduction negative pressure component are utilized to form at least two defense lines for noise resistance, so that noise can be greatly reduced. The silencer structure is arranged in such a way, so that the space occupied by the original structure of the air duct assembly and the noise reduction negative pressure assembly can be fully utilized, and the silencer structure is dispersed, thereby being beneficial to more comprehensive silencing.

The negative pressure component that makes an uproar falls sets up, can give consideration to the purpose that promotes smoking effect and makes an uproar falls. The arrangement of the noise reduction negative pressure component does not influence the normal airflow, is beneficial to reducing wind resistance, improving air quantity, does not need to increase fan power, specification and the like, is beneficial to keeping the overall dimension of the range hood small, and is beneficial to controlling the cost of the range hood.

In some embodiments, the air duct assembly includes a volute, the second air inlet being provided on the volute; the first silencing structure comprises a noise reduction cover plate connected with the volute, a silencing cavity is formed between the noise reduction cover plate and the volute, the first silencing structure further comprises a first silencing hole formed in the volute, and the first silencing hole is communicated with the silencing cavity.

Specifically, the first silencing structure further comprises a first sound absorbing member filled in the silencing cavity.

In some embodiments, the second sound attenuating structure includes: the second silencing hole is a through hole or a blind hole.

In some embodiments, the second sound attenuating structure includes: and the second sound absorbing piece is filled in the thickness space of the noise reduction negative pressure component.

In some embodiments, the air intake assembly further comprises: and the rectifying net is positioned at the second air inlet.

In some embodiments, the partition plate is provided with a matching opening, the upper part of the matching opening is opened, and the air duct component is installed at the matching opening; the smoke collecting hood comprises a front wall plate, a rear wall plate, a first side wall plate and a second side wall plate, wherein the first air inlet is formed in the front wall plate, the second negative pressure cavity is located between the partition plate and the front wall plate, the first side wall plate and the second side wall plate are oppositely arranged, the first side wall plate is connected between the front wall plate and the rear wall plate, and the second side wall plate is connected between the front wall plate and the rear wall plate.

Optionally, the partition is spaced from the rear wall plate, and an interference cavity is formed between the partition and the rear wall plate;

and/or, an interference cavity is formed between the noise reduction negative pressure component and at least one of the first side wall plate and the second side wall plate.

Further, the noise reduction negative pressure assembly includes: the side plate is connected with the edge of the partition plate, the side plate is enclosed outside the second negative pressure cavity, and the second silencing structure is arranged on at least one of the side plate and the partition plate. The noise reduction negative pressure assembly is provided with the partition plate and the side plate, so that the second negative pressure cavity is surrounded into a smaller gathering cavity, the second negative pressure cavity is kept in a stable negative pressure environment, and smoking and smoke gathering capabilities of the second negative pressure cavity are guaranteed.

In some embodiments, the separator comprises: the first partition plate and the second partition plate are positioned on two horizontal sides of the matching port;

the side panel further comprises: the first side plate is connected with the edge, far away from the matching opening, of the first partition plate, the second side plate is connected with the edge, far away from the matching opening, of the second partition plate, and the lower side plate is connected with the lower edge of the first side plate and the lower edge of the second side plate;

the smoke collecting hood comprises a first side wall plate and a second side wall plate, the first side wall plate is arranged opposite to the first side wall plate, and the second side wall plate is arranged opposite to the second side wall plate;

a second interference cavity is formed between the first side wall plate and the first side wall plate;

a third interference cavity is formed between the second sidewall plate and the second sidewall plate.

Optionally, the side plate further comprises: the first upper edge plate is connected with the upper edge of the first partition plate, and the second upper edge plate is connected with the upper edge of the second partition plate; and a communication port is formed between the first upper edge plate and the second upper edge plate, and the caliber of the communication port is larger than or equal to the maximum width of the air duct component.

In some embodiments, the air intake assembly further comprises: an air deflector rotatably connected to the fume collection hood, the air deflector having an open position and a closed position; the air deflector covers the first air inlet in the closed position; in the open position, the upper end of the air deflector is connected above the first air inlet, the lower end of the air deflector is opened relative to the first air inlet, and a third negative pressure cavity is formed between the air deflector and the first air inlet.

In some embodiments, the air intake assembly further comprises: and the noise reduction layer is arranged on the inner surface of the fume collecting hood.

According to an embodiment of the utility model, a range hood comprises: the air inlet assembly is the air inlet assembly in the embodiment; and the fan is arranged in the air duct component.

According to the range hood provided by the embodiment of the utility model, the air inlet assembly is arranged, so that the purposes of improving the smoking effect and reducing the noise can be achieved. Therefore, the wind resistance is favorably reduced, the wind quantity is promoted, the power, the specification and the like of the fan are not required to be increased, the whole machine of the range hood is favorably kept in a small outline dimension, and the cost of the range hood is favorably controlled.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a perspective view of a range hood according to an embodiment of the present utility model when a first air inlet is opened;

FIG. 2 is a schematic side view of the air intake assembly of the range hood of FIG. 1 with the first air inlet open;

FIG. 3 is a block diagram of an air duct assembly, a fan, and a first silencing structure, a rectifier network according to an embodiment of the present utility model;

FIG. 4 is a block diagram of a noise reducing negative pressure assembly and a second sound attenuating structure thereon according to one embodiment of the present utility model;

FIG. 5 is a schematic front view of an air intake assembly according to an embodiment of the present utility model;

fig. 6 is a view showing the structure of the smoke collecting hood, the air deflector and the wind deflector according to an embodiment of the present utility model.

Reference numerals:

a range hood 1000;

an air intake assembly 100; a blower 200;

the smoke collecting hood 1, a front wall plate 11, a rear wall plate 12, a first side wall plate 13, a second side wall plate 14 and a first air inlet 101;

the air duct assembly 2, the second air inlet 201, the volute 22, the volute coaming 221 and the volute end plate 222;

a noise reduction negative pressure component 3;

partition 31, fitting port 310, first partition 311, second partition 312, communication port 313,

Side panels 32, first upper side panel 321, first side panel 322, second upper side panel 323, second side panel 324, lower side panel 325;

a first negative pressure chamber 41, a second negative pressure chamber 42, a third negative pressure chamber 43;

an interference cavity 44, a first interference cavity 441, a second interference cavity 442, a third interference cavity 443;

the first sound-deadening structure 5, the first sound absorbing member 52, the noise-reduction cover plate 53, and the sound-deadening chamber 54;

a second sound deadening structure 6, a second sound deadening hole 61, and a second sound absorbing member 62;

a rectifying net 7; an air deflector 8; and a wind deflector 9.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "horizontal," "top," "bottom," "inner," "outer," "radial," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

An air intake assembly 100 according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

An air intake assembly 100 according to an embodiment of the present utility model, as shown in fig. 1 and 2, includes: the exhaust fume collecting hood comprises a fume collecting hood body 1, an air duct assembly 2 and a noise reduction negative pressure assembly 3, wherein a first air inlet 101 is formed in the fume collecting hood body 1.

The air duct component 2 is positioned in the fume collecting hood 1, a second air inlet 201 is arranged on the air duct component 2, and the air inlet component 100 forms a first negative pressure cavity 41 at the second air inlet 201. The noise reduction negative pressure component 3 is located in the fume collecting hood 1, the noise reduction negative pressure component 3 comprises a partition plate 31, the partition plate 31 is arranged opposite to the first air inlet 101, and the air inlet component 100 forms a second negative pressure cavity 42 between the partition plate 31 and the first air inlet 101. Wherein, be equipped with first amortization structure 5 on the wind channel subassembly 2, be equipped with second amortization structure 6 on the negative pressure subassembly of making an uproar 3 falls.

It will be appreciated that the air intake assembly 100 is used in a range hood 1000, and the range hood 1000 further includes a fan 200, and when the fan 200 is operated, the smoke is sucked from the first air inlet 101, sucked into the second air inlet 201 of the air duct assembly 2 through the second negative pressure cavity 42, and then discharged. Since the partition plate 31 is arranged opposite to the first air inlet 101, after the smoke is sucked into the smoke collecting hood 1, part of the smoke is directly sucked into the second air inlet 201, and the other part of the smoke is blocked by the partition plate 31, so that the smoke can be sucked into the second air inlet 201 after being buffered in the second negative pressure cavity 42.

Because the baffle 31 separates, can reduce the flue gas and directly dash through baffle 31, be favorable to keeping the higher negative pressure environment of second negative pressure chamber 42, make second negative pressure chamber 42 have better smoke gathering smoking effect, reduce the cigarette that runs.

In the scheme of the utility model, when the fan 200 is operated, noise generated in the air duct assembly 2 is transmitted to the second negative pressure cavity 41 and then transmitted out through the fume collecting hood 1. Through being provided with first amortization structure 5 on the wind channel subassembly 2, noise energy can accomplish once to consume through first amortization structure 5. And then when the noise is transmitted outwards, if the noise reduction negative pressure assembly 3 is encountered, the noise energy can be consumed for the second time through the second silencing structure 6. Noise transmitted to the second negative pressure chamber 41 is impacted by the air flow while being propagated, and collision with the air flow may consume part of energy of the noise.

Therefore, according to the air intake assembly 100 of the embodiment of the present utility model, by providing the noise reduction negative pressure assembly 3 in the fume collecting hood 1, the second negative pressure cavity 42 is partitioned by the partition plate 31, and the noise reduction negative pressure assembly 3 itself does not need to be too thick, so that excessive space is avoided. The second negative pressure cavity 42 is beneficial to gathering smoke before the smoke is sucked into the air duct assembly 2 in the smoke collecting cover 1, so that smoking performance is improved, and smoke leakage is reduced. The first silencing structure 5 arranged on the air duct component 2 and the second silencing structure 6 arranged on the noise reduction negative pressure component 3 are utilized to form at least two defense lines for noise resistance, so that noise can be greatly reduced.

In the prior art, most air inlet components are internally provided with sound absorbing pieces (sound absorbing cotton or noise reducing plates and the like), and only a single-layer noise reducing measure is adopted, so that the noise reducing effect is limited. And equivalent in this scheme to having set up at least twice amortization structure, not only having utilized first amortization structure 5 to fall from the source and having fallen the noise, can make full use of wind channel subassembly 2, fall the original structure occupation space of negative pressure component 3 of making an uproar, amortization structure distributes moreover, is favorable to the amortization more comprehensive, is favorable to improving the experience when the user uses air inlet subassembly 100.

The setting of the noise reduction negative pressure component 3 can achieve the purposes of improving smoking effect and reducing noise. The arrangement of the noise reduction negative pressure component 3 does not influence the normal airflow, is favorable for reducing wind resistance, improving air quantity, does not need to increase the power, specification and the like of the fan 200, is favorable for keeping small overall dimension of the whole range hood 1000, and is favorable for controlling cost.

In the embodiment of the present utility model, the type of the fan 200 is not limited, and may be a centrifugal fan, an axial flow fan or a diagonal flow fan, and the shape of the air duct assembly 2 is adapted to the type of the fan 200.

In some embodiments, as shown in fig. 3, the air duct assembly 2 includes a volute 22, and the second air intake 201 is disposed on the volute 22. The first silencing structure 5 includes a noise reduction cover plate 53 connected to the volute 22, and a silencing cavity 54 is formed between the noise reduction cover plate 53 and the volute 22.

So that part of the sound passes through the scroll casing 22, the sound deadening chamber 54 and the noise reduction cover 53 in this order as the sound propagates from the inside of the scroll casing 22 to the outside. It will be appreciated that there is at least one change in the propagation medium of sound from the volute 22 into the sound attenuation chamber 54 and at least one change in the propagation medium of sound from the sound attenuation chamber 54 into the noise attenuation cover 53.

As is well known to those skilled in the art, the propagation of sound essentially depends on the vibration of a medium (e.g., air, liquid, solid) and utilizes the connection between molecules of the medium to cause the oscillating waveform to be transmitted in all directions. Because of different restraining forces of different propagation mediums on the microscopic particles, when noise is conducted, the motion amplitude and the motion direction of the microscopic particles of two adjacent layers of mediums are different. This allows the sound to reflect, refract, etc. as it passes through the interface of the different media, reducing the transmission of sound waves.

Specifically, the first silencing structure 5 further includes a first silencing hole (not shown) formed on the scroll casing 22, the first silencing hole communicating with the silencing chamber 54.

The arrangement of the first silencing hole can enable noise to be transmitted into the first silencing hole to be reduced rapidly, for example, noise enters the small hole to generate vortex, and noise energy is consumed. For example, after the noise enters the small hole, the noise is reduced by the mutual cancellation of the incident sound wave and the reflected sound wave. Also, for example, the noise entrance aperture Kong Shengya is changed once and the noise exit aperture pressure is changed once again, so that the noise capability can be reduced between one entrance and one exit.

The first sound deadening hole and the sound deadening chamber 54 constitute a resonance structure. When the resonance frequency of the inflowing air flow is the same as that of the resonance structure, a fierce friction effect is generated between the air flow and the inner wall of the first silencing hole, the absorption effect of the first silencing structure 5 on noise is enhanced, and the purpose of noise reduction is achieved.

Alternatively, the first sound deadening hole may be one or more. Alternatively, the first sound deadening hole may be provided in a part of the scroll casing 22, and the first sound deadening hole may be disposed entirely on the scroll casing 22.

Further alternatively, the first silencing holes are perforated, and the first silencing holes are in multiple rows and multiple columns, so that the noise reduction effect is improved. The specific shape and size of the first sound deadening hole are not particularly limited herein, and the shape of the first sound deadening hole may be circular, square, elongated, or the like.

Further, the first silencing structure 5 further includes a first sound absorbing member 52 filled in the silencing cavity 54, and the first sound absorbing member 52 can be utilized to further absorb noise energy, so as to achieve the purpose of noise reduction. Alternatively, the first sound absorbing member 52 may be a sound absorbing cotton, felt layer, foam layer, or the like, without limitation.

For example, in one embodiment, a space (i.e. the silencing cavity 54) with a thickness is formed between the volute 22 and the noise reduction cover 53, the space is filled with sound-absorbing cotton as the first sound-absorbing member 52, and a plurality of holes (i.e. the first silencing holes) are formed in the volute coaming 221 on the outer ring of the volute 22. When the negative pressure generated by the fan 200 is concentrated at the second air inlet 201, the generated sound waves enter the silencing cavity 54 filled with the sound absorbing cotton through the holes on the outer ring of the volute coaming 221, and the sound waves are blocked by the holes of the volute coaming 221 and the sound absorbing cotton, so that the sound waves are converted into vibration mechanical energy and then converted into heat energy by the vibration mechanical energy, and the effect of reducing the sound wave energy is achieved.

In some embodiments, the scroll 22 includes a scroll shroud 221 and scroll end plates 222 connected to both sides of the scroll shroud 221, wherein one scroll end plate 222 is disposed adjacent to the first air inlet 101 of the fume collecting hood 1, and a second air inlet 201 is disposed on the scroll end plate 222, and the blower 200 is located in the scroll 22.

Specifically, the scroll casing board 221 is formed with the first silencing structure 5 on the left and right sides respectively, even the scroll casing end plates 222 on both sides can also be formed with the first silencing structure 5, the first silencing structure 5 covers the scroll casing 22 around, and the left and right sides completely, so that the sound wave generated during the operation of the fan 200 is reduced to the maximum extent, and meanwhile, the negative pressure formed by the air discharged from the air duct assembly 2 is concentrated at the second air inlet 201.

In some embodiments, the air intake assembly 100 further comprises: a rectifying net 7 at the second air inlet 201. The rectifying net 7 is used for homogenizing air flow with uneven flow speed, improving uniformity of the air flow entering the air duct assembly 2, reducing turbulence of the air flow inside, and achieving the purpose of reducing noise.

Specifically, the rectifying net 7 may be a planar structure, a plurality of evenly distributed meshes are formed, and edges of the rectifying net 7 are mounted on the air duct assembly 2.

The mesh openings of the rectifying net 7 are used for the passage of the air flow, and the mesh openings are uniformly distributed, thereby homogenizing the air flow. The rectifying net 7 is connected to the second air inlet 201 of the air duct assembly 2, so that the air flow passes through the mesh holes on the rectifying net 7 before entering the air duct assembly 2, so that the air flow is uniform, and the rectifying effect is improved. The rectifying net 7 is of a planar structure, is closer to the air inlet surface of the fan 200 in the air duct assembly 2, and ensures that the air flow entering the fan 200 is in a uniform flow state, thereby better playing the noise reduction effect.

Optionally, the shapes and sizes of all the meshes on the rectifying net 7 are the same, so that the uniformity of air flow is further ensured, and the noise reduction effect is further improved. It will be appreciated that the thicker the thickness of the screen 7, the more pronounced the noise reduction effect, the thickness of the screen 7 being in the range 0.5mm to 2.5mm. By the arrangement, the size of the whole range hood 1000 is not affected, and a good noise reduction effect can be achieved.

Optionally, the mesh is a regular polygon shaped hole. The mesh may be regular triangle holes, square holes, regular pentagon holes, regular hexagon holes, etc. For example, in a specific example, the mesh openings of the rectifying net 7 are regular hexagonal holes, and the plurality of mesh openings on the rectifying net 7 are arranged in a honeycomb shape.

In the scheme of the utility model, the installation position of the noise reduction negative pressure component 3 is flexible, and the noise reduction negative pressure component can be directly installed and fixed on the air duct component 2, can be directly installed and fixed on the fume collecting hood 1, and can be fixedly connected with the air duct component 2 and the fume collecting hood 1. For example, in the scheme, the upper end and the lower end of the noise reduction negative pressure component 3 are respectively connected with the upper wall plate and the lower wall plate of the fume collecting hood 1, and the installation position of the noise reduction negative pressure component is not limited.

In some embodiments, as shown in fig. 4 to 6, the partition 31 is provided with a coupling opening 310, and the coupling opening 310 is opened above, and the duct assembly 2 is installed at the coupling opening 310. The hood 1 comprises opposite front and rear panels 11, 12, a first air inlet 101 being provided in the front panel 11 and a second suction chamber 42 being located between the partition 31 and the front panel 11. The partition plate 31 is provided with a fitting opening 310, and when the partition plate 31 is assembled, the partition plate 31 can be firstly installed in the fume collecting hood 1, and then the air duct assembly 2 is assembled at the fitting opening 310 from top to bottom.

Specifically, as shown in fig. 5, at least one interference cavity 44 may be formed between the noise reduction negative pressure assembly 3 and the fume collecting hood 1.

For example, in some embodiments, as shown in FIG. 2, the baffle 31 is spaced from the rear wall panel 12, and an interference cavity 44 is formed between the baffle 31 and the rear wall panel 12, the interference cavity 44 being referred to as a first interference cavity 441. The noise transmitted into the first interference cavity 441 can consume part of the energy of the noise by using the space provided by the first interference cavity 441. Specifically, the sound wave is transmitted into the first interference cavity 441, and the sound wave collides with the inner wall of the first interference cavity 441 to consume part of energy, and part of the sound wave is bounced by the inner wall, so that the bounced sound wave collides with other sound waves in the first interference cavity 441 to consume part of energy. The noise in the first interference cavity 441 may be partially consumed when it is transmitted to the noise reduction negative pressure assembly 3, such as when it encounters the second silencing structure 6. The noise reduction effect can be greatly improved by repeating the steps, so that the noise can be effectively reduced by the first interference cavity 441 separated from the back of the partition plate 31.

For example, in some embodiments, as shown in fig. 5, the hood 1 includes a front wall panel 11, a rear wall panel 12, a first side wall panel 13, and a second side wall panel 14. The first air intake 101 is provided in the front wall panel 11, the second negative pressure chamber 42 is located between the partition panel 31 and the front wall panel 11, the first side wall panel 13 and the second side wall panel 14 are disposed opposite to each other, the first side wall panel 13 is connected between the front wall panel 11 and the rear wall panel 12, and the second side wall panel 14 is connected between the front wall panel 11 and the rear wall panel 12.

The noise reducing sub-assembly 3 forms an interference cavity 44 with at least one of the first side wall plate 13 and the second side wall plate 14. For convenience of description, the noise reduction negative pressure assembly 3 and the first side wall plate 13 are referred to herein as forming a second interference cavity 442 therebetween, and the noise reduction negative pressure assembly 3 and the second side wall plate 14 are referred to herein as forming a third interference cavity 443 therebetween.

Noise transmitted into the second interference cavity 442 can also consume a portion of the energy of the noise by utilizing the space provided by the second interference cavity 442. Specifically, the sound wave is transmitted into the second interference cavity 442, and the sound wave collides with the inner wall of the second interference cavity 442 to consume part of energy, and part of the sound wave is bounced by the inner wall, so that the bounced sound wave collides with other sound waves in the second interference cavity 442 to consume part of energy. The noise in the second interference cavity 442 may be partially consumed when it is transmitted to the noise reduction negative pressure assembly 3, such as when it encounters the second silencing structure 6. The noise reduction effect can be greatly improved by repeating the steps.

Similarly, the noise transmitted into the third interference cavity 443 can consume part of the energy of the noise by using the space provided by the third interference cavity 443. Specifically, the sound wave is transmitted into the third interference cavity 443, and the sound wave collides with the inner wall of the third interference cavity 443 to consume part of energy, and part of the sound wave is bounced by the inner wall, and the bounced sound wave collides with other sound waves in the third interference cavity 443 to consume part of energy. The noise in the third interference cavity 443 is partially consumed when it reaches the noise reducing negative pressure assembly 3, such as when it encounters the second silencing structure 6. The noise reduction effect can be greatly improved by repeating the steps.

In some embodiments, as shown in fig. 4, the noise reducing negative pressure assembly 3 includes: the side plate 32,5 to which the edge of the partition plate 31 is attached, the side plate 32 is surrounded outside the second negative pressure chamber 42, and the second sound deadening structure 6 is provided on at least one of the side plate 32 and the partition plate 31.

The partition plate 31 and the side plates 32 are arranged on the noise reduction negative pressure assembly 3, so that the second negative pressure cavity 42 is surrounded into a smaller gathering cavity, the second negative pressure cavity 42 is kept in a stable negative pressure environment, and smoking and smoke gathering capabilities of the second negative pressure cavity are guaranteed.

Specifically, the separator 31 includes: a first partition 311 and a second partition 312, the first partition 311 and the second partition 312 being located at both horizontal sides of the fitting opening 310.

0 wherein the side plate 32 further comprises: a first side edge plate 322, a second side edge plate 324, and a lower edge plate 325, a first side edge

The plate 322 connects the edge of the first partition 311 away from the mating opening 310, the second side plate 324 connects the edge of the second partition 312 away from the mating opening 310, and the lower plate 325 connects the lower edge of the first side plate 322 and the lower edge of the second side plate 324. The fume collecting hood 1 comprises a first side wall plate 13 and a second side wall plate 14, wherein the first side wall plate 13 is connected with the front wall plate

11 and the rear wall panel 12 and is disposed opposite the first side panel 322, and the second side wall panel 14 is connected between the front wall panel 11 and the rear wall panel 5 and is disposed opposite the second side panel 324.

A second interference cavity 442 is formed between the first sidewall plate 13 and the first sidewall plate 322. A third interference cavity 443 is formed between the second sidewall plate 14 and the second side edge plate 324. By the arrangement, the second negative pressure cavity 42 is more concentrated, redundant space is vacated to form the second interference cavity 442 and the third interference cavity 443, and space for collision and consumption of different sound waves is provided, so that the noise reduction effect is improved.

0 specifically, the side plate 32 further includes: a first upper plate 321 and a second upper plate 323, the first upper plate 321 being connected to

The upper edge of the first partition 311 and the second upper edge plate 323 are connected to the upper edge of the second partition 312. A communication port 313 is formed between the first upper plate 321 and the second upper plate 323, and the caliber of the communication port 313 is equal to or larger than the maximum width of the air duct assembly 2. In this way, the connection port 313 can be matched with the matching port 310, so that the assembly of the air duct assembly 2 and the noise reduction negative pressure assembly 3 is facilitated.

In some embodiments, the edge plate 32 includes: a first upper side plate 321, a first side plate 322, a second upper side 5 plate 323, a second side plate 324, and a lower side plate 325, the first upper side plate 321 being connected to the upper edge of the first partition 311,

the first side plate 322 is connected to an edge of the first partition 311 away from the mating opening 310, the second upper plate 323 is connected to an upper edge of the second partition 312, the second side plate 324 is connected to an edge of the second partition 312 away from the mating opening 310, and the lower plate 325 is connected to a lower edge of the first side plate 322 and a lower edge of the second side plate 324.

Thus, the noise reduction negative pressure component 3 can form a three-dimensional frame integrally, the frame is connected with the fume collecting hood 1, and the air duct component 2 is arranged in the middle 0. After the air duct assembly 2 is placed, the second negative pressure chamber 42 includes negative pressure chambers on both sides of the air duct assembly 2.

With the structure, the noise reduction negative pressure assembly 3 is conveniently installed and fixed by the air duct assembly 2, and vibration is reduced.

Optionally, the second silencing structure 6 further includes: the second silencing hole 61 is a through hole or a blind hole, and the second silencing hole 61 is a through hole or a blind hole. The second silencing hole 61 is arranged to allow noise to be transmitted into the second silencing hole 61 to be reduced rapidly, for example, noise energy is consumed by the noise entering the small hole to generate vortex. For example, after the noise enters the small hole, the noise is reduced by the mutual cancellation of the incident sound wave and the reflected sound wave. Also, for example, the noise entrance aperture Kong Shengya is changed once and the noise exit aperture pressure is changed once again, so that the noise capability can be reduced between one entrance and one exit.

Further, the second silencing structure 6 further includes: and a second sound absorbing member 62 filled in the thickness space of the noise reduction negative pressure assembly 3. Therefore, sound waves pass through the noise reduction negative pressure assembly 3 and enter the second sound absorbing piece 62, and can also convert sound wave energy into vibration mechanical energy, and then the vibration mechanical energy is converted into heat energy, so that the effect of reducing the sound wave energy is achieved.

The second sound absorbing piece 62 is filled in the thickness space of the noise reduction negative pressure component 3, so that sound waves can pass through interfaces of different propagation media for many times, and the noise reduction capability is improved.

In some embodiments, the noise reduction negative pressure assembly 3 is provided with a second silencing hole 61, and the whole plate body is 2-12mm thick, and sound-absorbing cotton is arranged in the thickness and fixed by clamping feet on the plate body.

Specifically, the bottoms of the first side plate 322 and the second side plate 324 are connected by a lower side plate 325, and at this time, the outside of the frame of the whole second negative pressure cavity 42 is wrapped by sound-absorbing cotton.

When the side plate 32 includes: in the case of the first upper side plate 321, the first side plate 322, the second upper side plate 323, the second side plate 324, and the lower side plate 325, at least one of the side plates may be fixedly connected, for example, to the front wall plate 11, the first side wall plate 13, and the second side wall plate 14 of the hood 1. For another example, the lower plate 325 may be fixedly attached to a lower wall plate at the bottom of the hood 1.

Optionally, the second silencing holes 61 and the second sound absorbing pieces 62 are arranged on all the plate bodies of the noise reduction negative pressure assembly 3, so that the coverage area of the second silencing structure 6 is increased, and the silencing effect is enhanced.

In some alternative embodiments, both the first upper edge panel 321 and the second upper edge panel 323 are higher than the second air inlet 201 at an end adjacent to each other. A communication port 313 is formed between the first upper plate 321 and the second upper plate 323, and the communication port 313 is higher than the second air inlet 201. The air flow in the interference chamber 44 thus also enters the second negative pressure chamber 42 through the communication port 313, and is sucked into the air duct assembly 2. So designed, the communication port 313 is located above the second air inlet 201, and the flue gas sucked from the first air inlet 101 is not easy to leak from the communication port 313.

In some embodiments, as shown in fig. 6, the air intake assembly 100 further includes: an air deflector 8 rotatably connected to the fume collecting hood 1, the air deflector 8 having an open position and a closed position. In the closed position the air deflector 8 is covered at the first air inlet 101. In the open position, the upper end of the air deflector 8 is connected above the first air inlet 101, the lower end of the air deflector 8 is outwards opened relative to the first air inlet 101, and a third negative pressure cavity 43 is formed between the air deflector 8 and the first air inlet 101.

Specifically, two sides of the air deflector 8 are connected with air deflectors 9, and an external negative pressure cavity, namely a third negative pressure cavity 43, is formed between the turned-on air deflector 8 and the first air inlet 101 and between the turned-on air deflector 9 and the left and right air deflectors 9. This third negative pressure chamber 43 acts directly above the hob during kitchen cooking. The third negative pressure chamber 43 is opened at the lower side for smoke intake.

Optionally, the air deflector 8 forms a golden angle of 60 degrees with the vertical direction in the open position, so that the area generating oil smoke during cooking can be radiated to the maximum extent.

In some embodiments, the air intake assembly 100 further comprises: the noise reduction layer is arranged on the inner surface of the fume collecting hood 1, and the arrangement of the noise reduction layer is equivalent to that of the third noise reduction structure arranged on the air inlet assembly 100, so that the sound absorption capacity of the noise reduction layer can be utilized, and the noise reduction effect is improved.

Alternatively, the noise reduction layer may be a sound absorbing cotton, felt layer, foam layer, or the like, without limitation. When the sound wave encounters the barrier of the noise reduction layer, the sound wave energy is converted into vibration mechanical energy, and then the vibration mechanical energy is converted into heat energy, so that the effect of reducing the sound wave energy is achieved.

A range hood 1000 according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1, the range hood 1000 according to the embodiment of the present utility model includes the air intake assembly 100 and the blower 200 according to the above embodiment, and the blower 200 is disposed in the air intake assembly 100.

According to the range hood 1000 of the embodiment of the utility model, the air inlet assembly 100 is arranged, so that the purposes of improving smoking effect and reducing noise can be achieved. Therefore, the wind resistance is favorably reduced, the wind quantity is promoted, the power, the specification and the like of the fan 200 are not required to be increased, the whole range hood 1000 is favorably kept in a smaller external dimension, and the cost of the range hood 1000 is favorably controlled.

In some embodiments, as shown in fig. 1-6, the range hood 1000 is a wall-suction range hood. Specifically, when the range hood 1000 is installed, the back can be clung to the wall, and the front side of the fume collecting hood 1 is provided with the first air inlet 101. The volute 22 of the air duct assembly 2 is provided with a first silencing structure 5, and all the plates of the noise reduction negative pressure assembly 3 are provided with a second silencing structure 6.

When the range hood 1000 works, sound waves generated by the air duct assembly 2 pass through the first silencing structure 5, and a part of energy is consumed through the first silencing structure 5. The transmission of sound waves to the noise reduction negative pressure assembly 3 can consume a part of energy through the second silencing structure 6, and after the sound waves are transmitted to each interference cavity 44, a part of energy is consumed. The second negative pressure cavity 42 is arranged at the left side and the right side of the air duct component 2, and can further furl the negative pressure generated by the air duct component 2, so that the negative pressure generated by the air duct component 2 at the second air inlet 201 can be concentrated at the first air inlet 101 of the fume collecting hood 1, the negative pressure maximization at the first air inlet 101 is realized, and the smoking effect of the range hood 1000 is greatly enhanced.

An external third negative pressure cavity 43 is formed between the turned-on air deflector 8 and the first air inlet 101 and between the turned-on air deflector and the left and right air deflectors 9, the third negative pressure cavity 43 directly acts right above a kitchen range during kitchen cooking, and the air deflector 8 is turned-on to form a 60-degree golden included angle with the vertical direction, so that an area generating oil smoke during cooking can be radiated to the greatest extent.

In each interference cavity 44, when the sound wave inside the range hood 1000 works is transmitted to the fume collecting hood 1, a part of sound wave can be bounced by the fume collecting hood 1, the bounced sound wave collides with other sound waves in each interference cavity 44, the two sound waves collide with each other in each interference cavity 44 to consume energy, and meanwhile, the bounced sound wave encounters the second silencing structure 6 to consume energy, so that the maximization of the elimination of the noise generated by the range hood 1000 in the range hood 1000 is realized repeatedly, thereby reducing the noise of products and improving the use experience.

Other components such as a control panel and a power module, etc. and operation of the range hood 1000 according to the embodiment of the present utility model are well known to those skilled in the art, and will not be described in detail herein.

In the description of the present specification, descriptions with reference to the terms "embodiment," "example," and the like are intended to refer to the embodiment as being combined with

Or example, the particular features, structures, materials, or characteristics described are included in at least one embodiment or example 5 of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. While

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

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: at the position of

Many changes, modifications, substitutions 0 and variations may be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (14)

1. An air intake assembly, comprising:

the smoke collecting hood comprises a smoke collecting hood body (1), wherein a first air inlet (101) is formed in the smoke collecting hood body (1);

the air duct assembly (2), the air duct assembly (2) is positioned in the fume collecting hood (1), a second air inlet (201) is formed in the air duct assembly (2), and the air inlet assembly (100) forms a first negative pressure cavity (41) at the second air inlet (201);

the noise reduction negative pressure assembly (3), the noise reduction negative pressure assembly (3) is positioned in the fume collecting hood (1), the noise reduction negative pressure assembly (3) comprises a partition plate (31), the partition plate (31) and the first air inlet (101) are oppositely arranged, and a second negative pressure cavity (42) is formed between the partition plate (31) and the first air inlet (101) by the air inlet assembly (100);

the air duct assembly (2) is provided with a first silencing structure (5), and the noise reduction negative pressure assembly (3) is provided with a second silencing structure (6).

2. The air inlet assembly according to claim 1, wherein the air duct assembly (2) comprises a volute (22), and the second air inlet (201) is arranged on the volute (22);

the first silencing structure (5) comprises a noise reduction cover plate (53) connected with the volute (22), a silencing cavity (54) is formed between the noise reduction cover plate (53) and the volute (22), the first silencing structure (5) further comprises a first silencing hole formed in the volute (22), and the first silencing hole is communicated with the silencing cavity (54).

3. An air intake assembly according to claim 2, wherein the first sound attenuating structure (5) further comprises a first sound absorbing member (52) filled in the sound attenuating cavity (54).

4. The air intake assembly of claim 1, wherein the second sound attenuating structure (6) further comprises: and the second silencing hole (61) is a through hole or a blind hole.

5. The air intake assembly of claim 1, wherein the second sound attenuating structure (6) further comprises: and a second sound absorbing member (62) filled in the thickness space of the noise reduction negative pressure assembly (3).

6. The air intake assembly of claim 1, further comprising: and the rectifying net (7) is positioned at the second air inlet (201).

7. The air intake assembly according to any one of claims 1-6, wherein a fitting opening (310) is provided on the partition plate (31), the fitting opening (310) is opened above, and the air duct assembly (2) is installed at the fitting opening (310);

the smoke collecting hood (1) comprises a front wall plate (11), a rear wall plate (12), a first side wall plate (13) and a second side wall plate (14), wherein a first air inlet (101) is formed in the front wall plate (11), a second negative pressure cavity (42) is formed between the partition plate (31) and the front wall plate (11), the first side wall plate (13) and the second side wall plate (14) are oppositely arranged, the first side wall plate (13) is connected between the front wall plate (11) and the rear wall plate (12), and the second side wall plate (14) is connected between the front wall plate (11) and the rear wall plate (12).

8. The air intake assembly of claim 7, wherein the baffle (31) is spaced from the rear wall panel (12), the baffle (31) and the rear wall panel (12) defining an interference cavity (44) therebetween;

and/or, an interference cavity (44) is formed between the noise reduction negative pressure component (3) and at least one of the first side wall plate (13) and the second side wall plate (14).

9. The air intake assembly according to claim 7, wherein the noise reducing negative pressure assembly (3) comprises: and a side plate (32) connected with the edge of the partition plate (31), wherein the side plate (32) is enclosed outside the second negative pressure cavity (42), and the second silencing structure (6) is arranged on at least one of the side plate (32) and the partition plate (31).

10. An air intake assembly according to claim 9, wherein the partition (31) comprises: a first partition plate (311) and a second partition plate (312), the first partition plate (311) and the second partition plate (312) being positioned on both horizontal sides of the fitting opening (310);

the side plate (32) further includes: a first side plate (322), a second side plate (324), and a lower side plate (325), the first side plate (322) connecting an edge of the first partition (311) away from the mating opening (310), the second side plate (324) connecting an edge of the second partition (312) away from the mating opening (310), the lower side plate (325) connecting a lower edge of the first side plate (322) and a lower edge of the second side plate (324);

the first side wall plate (13) is arranged opposite to the first side wall plate (322), and the second side wall plate (14) is arranged opposite to the second side wall plate (324); -forming a second interference cavity (442) between said first side wall plate (13) and said first side wall plate (322);

a third interference cavity (443) is formed between the second side wall plate (14) and the second side wall plate (324).

11. The air intake assembly of claim 10, wherein the side panels (32) further comprise: a first upper edge plate (321) and a second upper edge plate (323), wherein the first upper edge plate (321) is connected with the upper edge of the first partition plate (311), and the second upper edge plate (323) is connected with the upper edge of the second partition plate (312);

a communication port (313) is formed between the first upper edge plate (321) and the second upper edge plate (323), and the caliber of the communication port (313) is larger than or equal to the maximum width of the air duct assembly (2).

12. The air intake assembly of any one of claims 1-6, further comprising: an air deflector (8) rotatably connected to the fume collecting hood (1), the air deflector (8) having an open position and a closed position;

the air deflector (8) covers the first air inlet (101) at the closing position;

in the open position, the upper end of the air deflector (8) is connected above the first air inlet (101), the lower end of the air deflector (8) is outwards opened relative to the first air inlet (101), and a third negative pressure cavity (43) is formed between the air deflector (8) and the first air inlet (101).

13. The air intake assembly of any one of claims 1-6, further comprising: and the noise reduction layer is arranged on the inner surface of the fume collecting hood (1).

14. A range hood, comprising:

an air intake assembly (100), the air intake assembly being an air intake assembly (100) according to any one of claims 1-13;

the fan (200) is arranged in the air duct assembly (2).

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