CN212081372U - Smoke exhaust ventilator - Google Patents

Abstract

The utility model belongs to the field of kitchen appliances, in particular to a range hood, which comprises a frame part, wherein a fan assembly is arranged in a frame cavity of the frame part; the transition connecting assembly is connected to the bottom edge of the frame part and comprises a transition cavity in a downward closing shape; the nose part is connected with the transition connecting assembly, and the bottom end of the nose part extends downwards; and a noise reduction assembly disposed at least partially in the transition cavity. The utility model discloses an among the range hood, set up the transitional coupling cavity of the form of closing in the mouth between frame chamber and aircraft nose chamber, lean on the aircraft nose portion back and attenuation, more be suitable for little kitchen space and use, be difficult for bumping with people or frying pan etc. and realize nearly taking out the effect, more the accessible sets up the noise reduction subassembly in the transitional coupling cavity, reduces the noise reverberation that the noise under operation of fan probably produced in the transitional coupling cavity to noise reduction output improves user experience.

Description

Smoke exhaust ventilator

Technical Field

The utility model belongs to the kitchen appliance field specifically, relates to a range hood.

Background

As an indispensable electrical product in a kitchen, the performance, appearance and user experience of a range hood are always the focus of attention of researchers. Although the existing range hood has various appearance types and respective working performance, for a Chinese kitchen, a considerable proportion of kitchen space is narrow, but the requirement on strong suction capacity and low working noise exists, and a lot of existing range hoods are difficult to meet the requirements of users.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned not enough or defect among the prior art, the utility model provides a novel range hood is suitable for little kitchen space, and noise at work is little.

In order to achieve the above object, the utility model provides a range hood, range hood includes:

the fan assembly is arranged in a rack cavity of the rack part;

the transition connecting assembly is connected to the bottom edge of the frame part and comprises a transition cavity in a downward closing shape;

the nose part is connected with the transition connecting assembly, and the bottom end of the nose part extends downwards; and

a noise reduction assembly disposed at least partially in the transition cavity.

In some embodiments, the noise reduction assembly includes a noise baffle disposed in the transition cavity, the noise baffle being obliquely positioned to reflect noise sound waves toward the chassis cavity directly below the fan assembly.

Optionally, the noise reduction assembly comprises a sound absorbing element disposed on a back side of the noise baffle.

In some embodiments, the noise reduction assembly includes a noise absorber disposed in the housing cavity directly below the fan assembly, the noise absorber disposed in spaced opposition to the noise baffle to absorb reflected noise sound waves.

Optionally, the noise absorbing member comprises a mesh plate for forming a helmholtz resonator, and a plurality of sound absorbing mesh holes are distributed on the mesh plate and penetrate through the mesh plate.

Alternatively, the noise absorbing member may include a sound absorbing member disposed at a rear surface of the mesh plate and absorbing noise waves passing through the sound absorbing mesh.

In some embodiments, the mesh panel is connected at a top end to a fan base of the fan assembly and at a bottom end to a frame back panel of the frame portion.

In some embodiments, the fan bottom of the fan assembly is angled rearwardly relative to the fan top.

Optionally, the aircraft nose front side wall at the top of aircraft nose portion is formed with aircraft nose lateral wall opening that the opening is forward, transition coupling assembling includes that the rear end shroud is in on the aircraft nose lateral wall opening and the front end orientation the oblique shroud that the bottom front portion of rack portion extended, the transition chamber is formed in the oblique shroud, the noise reflecting plate is followed aircraft nose lateral wall open-ended below orientation the anterior oblique upward extension of bottom face of rack portion.

Optionally, the range hood comprises at least one of the following modes:

the first method is as follows: the machine frame part and the machine head part are both cubic and aligned in rear end, and the thickness of the machine frame part is greater than that of the machine head part along the front and rear directions of the range hood;

the second method comprises the following steps: a cigarette sucking port of a cigarette machine with a forward inclined downward opening is formed at the bottom end of the nose part;

the third method comprises the following steps: the extension line of the perpendicular bisector of the noise reflection plate passes through the fan assembly.

The utility model discloses an among the range hood, through appearance structure's optimal design, set up the transitional coupling chamber of the form of closing in the mouth between the frame chamber of frame portion and the aircraft nose chamber of aircraft nose portion, just lean on the back and thinization design also with the aircraft nose portion, can more be suitable for little kitchen space to use, be difficult for bumping with people or frying pan etc. and suction oil smoke effect is good, and the accessible sets up the subassembly of making an uproar that falls in the transitional coupling chamber, the noise of operation that reduces the fan produces the noise reverberation in the transitional coupling chamber, thereby noise output is littleer, user experience degree is better.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a conventional near-suction range hood;

fig. 2 is a schematic structural diagram of a conventional european range hood;

fig. 3 is a perspective view of a range hood according to an embodiment of the present invention;

FIG. 4 is an assembled exploded view of FIG. 3;

figures 5 and 6 are side views of the range hood of figure 3 illustrating the path of noise within the range hood without and with noise reduction assemblies, respectively, with arrows representing noise sound waves;

FIG. 7 is a perspective view of a noise baffle;

fig. 8 is a perspective view of a noise absorber with a sound absorbing member; and

fig. 9 is a partial enlarged view of the circled portion of fig. 8.

Description of reference numerals:

frame part 2 transition connecting assembly

3 head 4 fan subassembly

5 noise reflection board 6 sound absorption element

7 noise absorbing piece 8 frying pan

9 check valve 10 noise vortex

11 frame back panel 12 front decorative cover

13 frame left coaming and 14 frame right coaming

15 rack top plate

21 inclined cover 22 connecting enclosure frame

Front side wall of smoking port 32 machine head of 31-type cigarette making machine

33 rear side wall of head 34 head ceiling wall

41 front tuyere end 42 rear tuyere end

43 volute air outlet 71 sound-absorbing mesh

321 nose side wall opening 341 nose top wall opening

411 left volute bracket 412 right volute bracket

Horizontal upper inclination angle of 421 rear volute bracket b

A frame cavity B transition cavity

OO' fan axis of C machine head cavity

D guide plate front and back width a downward-moving front rake

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Fig. 1 shows a common near-suction range hood, the front and rear widths of the whole range hood are gradually decreased from top to bottom, and the bottom end of the range hood extends backwards and downwards and can be closer to a smoke source. The front and the back of the whole machine are at the widest position at the top end of the machine body, so that the head is not easy to collide. But the user is in the use, and frying pan 8 is easy when turning over the stir-fry bump with range hood's bottom, and the oval frame in the picture marks the position promptly, can cause the experience effect not good like this, and because the front and back size of near-suction range hood is less, the oil smoke easily diffuses forward, and smoking effect is also not good.

Fig. 2 shows a conventional european range hood, in which the front and rear widths D of the deflector are too large, so that the head of a user is easy to collide with the deflector in the use process, that is, the position of the oval frame in fig. 2 is marked, especially when the space of a kitchen is small. And the oil smoke suction port is far away from the smoke source of the cooking bench, so that the oil smoke is difficult to suck away in time, and the oil smoke is easy to diffuse.

The utility model provides a novel range hood, as shown in fig. 3, nose portion 3 is the design of platykurtic wall subsides, and the width reduces greatly in the aircraft nose width of nearly inhaling range hood around nose portion 3's whole, can solve the frying pan and turn over the problem of frying time and range hood collision, and the mouth of smoking can be nearer from the smoke source moreover to solve the not good problem of smoking effect. In particular, the left and right width of the flat nose part can be designed to be larger so as to enlarge the width of the smoking port 31 of the cigarette machine and improve the smoking effect. The front-rear width of the frame portion 1 is also relatively small. The structure and the size design of the range hood are more suitable for kitchens with small spaces, mechanical interference is not easy to generate, and the suction effect is good.

With reference to fig. 3 to 6, in a specific embodiment of the present invention, the range hood includes:

a fan assembly 4 is arranged in a rack cavity A of the rack part 1;

the transition connecting assembly 2 is connected to the bottom edge of the frame part 1 and comprises a transition cavity B in a downward closing shape;

the nose part 3 is connected with the transition connecting assembly 2, and the bottom end of the nose part extends downwards; and

a noise reduction assembly disposed at least partially in the transition cavity B.

The cross section area of the frame cavity A is larger than that of the handpiece cavity C, a transition cavity B which gradually transitions exists between the frame cavity A and the handpiece cavity C, and the transition cavity B is in a downward closing shape, namely the cross section area is gradually reduced from top to bottom. The noise sound wave at the front air port of the fan component 4 mainly flows downwards and outwards through the rack cavity A, the transition cavity B, the machine head cavity C and the smoking port 31 of the cigarette machine in sequence. In this process, as shown in fig. 5 and 6, a large number of noise vortices 10 are easily generated in the front lower portion of the housing cavity a, particularly in the transition cavity B, and reverberation is generated, thereby increasing noise and bringing a bad user experience to a user. Therefore, the utility model discloses add the subassembly of making an uproar that falls to at least partly set up in transition chamber B, with noise reduction vortex 10, reduce the reverberation.

Referring to fig. 6, the noise reduction assembly includes at least a noise reflection plate 5 disposed in the transition chamber B, the noise reflection plate 5 being disposed obliquely to reflect noise sound waves toward the chassis chamber a directly below the fan assembly 4. This avoids the generation of noise vortices 10 in the transition chamber B and the reflected noise sound waves repeatedly collide and are lost in the housing chamber a directly below the fan assembly 4, thereby attenuating the noise.

As shown in fig. 7, the noise baffle 5 may be a smooth-sloped panel that facilitates reflection and has a peripheral flange for secure attachment to a sidewall of the transition joint assembly 2 or nose front sidewall 32, or the like.

Further, the noise reduction assembly may include a noise absorbing member 7 disposed in the housing cavity a directly below the fan assembly 4, the noise absorbing member 7 being disposed in spaced opposition to the noise reflection plate 5 to absorb the reflected noise sound waves, as shown in fig. 6. Thus, the noise sound waves reflected by the noise reflection plate 5 can be absorbed mostly by the noise absorption member 7 provided oppositely. In fig. 6, the horizontal upper inclination angle b of the noise reflection plate 5 is generally not less than 30 °. Alternatively, the extension line of the perpendicular bisector of the noise reflection plate 5 passes through the fan assembly 4, and the noise can be more accurately reflected toward the noise absorbing member 7.

The noise absorbing member 7 may be noise reduction cotton, and in the present embodiment, a noise reduction technique of the hozoz resonator is particularly adopted in consideration of factors such as fire prevention, maintenance, and noise reduction effect. Referring to fig. 8 and 9, the noise absorbing member 7 mainly includes a mesh plate for forming a helmholtz resonator, and a plurality of sound absorbing mesh holes 71 are distributed on the mesh plate to penetrate therethrough. After the reflected noise is transmitted to the mesh plate, the mesh plate can reduce the noise through the Hotz resonant cavity effect. It should be noted that the noise reduction technology of the hotz resonant cavity is a known technology in the field of noise elimination and noise reduction, and is not described herein again.

Wherein, inhale various shapes such as sound mesh 71 can be round hole, square hole or rectangular hole, mesh size, distribution density can be according to the concrete optimal settings of actual noise cancelling effect, the utility model discloses do not specially limit here. The sound-absorbing mesh 71 of the mesh plate may be formed by punching, and may have a hole skirt.

Further, the noise absorbing member 7 may further include a sound absorbing member 6 provided on the rear surface of the mesh plate and absorbing noise waves passing through the sound absorbing mesh 71 to better absorb noise. Similarly, the noise reflection plate 5 may be a mesh plate, and the sound absorption member 6 may be provided on the back surface of the noise reflection plate 5.

Referring to fig. 9, the mesh plate of the noise absorbing member 7 may be flanged for fixing the mesh plate. Specifically, in fig. 6, the top end of the mesh plate may be connected to the blower bottom of the blower assembly 4, and the bottom end of the mesh plate may be connected to the frame back panel 11 of the frame portion 1. Therefore, the fan assembly 4 can obtain stronger and more reliable support through the mesh plate, and the anti-falling performance of the fan in the assembling and transporting processes is favorably enhanced.

In the specific embodiment shown in fig. 4 to 6, the frame portion 1 and the head portion 3 are both cube-shaped and aligned in the rear end, and along the front-rear direction of the range hood, the thickness of the frame portion 1 is greater than that of the head portion 3, that is, the front-rear thickness dimension between the front decorative cover 12 and the frame back panel 11 is greater than that between the front side wall 32 and the rear side wall 33 of the head portion.

The fan assembly 4 of the range hood can be arranged in front and back, i.e. the axis of the fan extends horizontally in front and back. However, in the embodiment shown in fig. 4, although the fans are also arranged in front and back, they are arranged in opposite inclined positions, that is, the bottom of the fan assembly 4 is inclined backward with respect to the top of the fan, and an included angle a exists between the fan axis OO 'and the horizontal line in the front-back direction, as shown in fig. 5 and 6, a forward and downward forward-inclined angle a is formed between the fan axis OO' and the top plate of the rack portion 1. The downward rake angle a is generally not greater than 60 °, and may be about 15 ° in the present embodiment. By arranging the fan obliquely, the air inlet channel of the smoke machine can be optimized, the narrow part of the channel is widened, and the wind resistance formed at the bottom end of the front wind port end 41 of the fan assembly 4 is reduced.

Referring to fig. 4, the top of the fan assembly 4 is connected to the frame, a left volute bracket 411 and a right volute bracket 412 are respectively disposed on two sides of the front air inlet 41, a rear volute bracket 421 is disposed at the bottom of the rear air inlet 42, the left volute bracket 411 and the right volute bracket 412 are correspondingly connected to the frame left coaming 13 and the frame right coaming 14, and the rear volute bracket 421 is connected to the frame rear coaming 11.

The fan assembly 4 comprises a volute air outlet 43 at the top end, and the volute air outlet 43 is connected to the rack top plate 15 of the rack part 1 through a top flange. Although the fan is tilted, the top flange face of the volute outlet 43 should be kept horizontal to abut against the frame top plate 15 and connect the check valve 9.

In order to achieve smooth air intake, the head front sidewall 32 at the top of the head portion 3 may be formed with a head sidewall opening 321 with a forward opening, the transition connection assembly 2 includes an inclined cover 21 with a rear end covering the head sidewall opening 321 and a front end extending toward the front of the bottom end of the frame portion 1, the transition cavity B is formed in the inclined cover 21, and the noise reflection plate 5 extends obliquely upward from below the head sidewall opening 321 toward the front of the bottom end surface of the frame portion 1.

The head top wall 34 of the head 3 may be provided with a head top wall opening 341 opening upwards to enhance direct communication of the head chamber C with the housing chamber a. The operating noise is routed from the front air inlet end 41 toward the transition cavity B of the transition coupling assembly 2 and enters the nose cavity C through the nose side wall opening 321 and the nose top wall opening 341, respectively, and finally escapes from the cigarette smoking port 31 of the cigarette maker. Therefore, by adding the noise reflection plate 5 in the transition cavity B of the transition connection assembly 2, not only the noise vortex is destroyed, but also the noise sound wave is reflected back to the rack cavity a, and the noise sound wave energy is weakened by repeated collision.

The handpiece top wall opening 341 and the handpiece side wall opening 321 can be integrally communicated, and the transition connection assembly 2 can further comprise a connection surrounding frame 22, wherein the connection surrounding frame 22 is connected with the bottom edge of the handpiece portion 1 and connected with the top of the handpiece portion 3 around the handpiece top wall opening 341. More specifically, the front end of the angled cover 21 may be connected to the front frame of the connection enclosure 22, and the front end of the noise reflection plate 5 should have a height not exceeding the head top wall opening 341. The frame part 1 and the nose part 3 are both cubic, the frame back board 11 at the rear end is aligned with the nose back side wall 33, and the bottom end of the nose part 3 is provided with a cigarette smoking port 31 which is opened forwards and obliquely downwards so as to be close to a cigarette source and obtain better smoking effect.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. 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.

Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A range hood, characterized in that, range hood includes:

the fan assembly comprises a frame part (1), wherein a fan assembly (4) is installed in a frame cavity (A) of the frame part (1);

the transition connecting assembly (2) is connected to the bottom edge of the frame part (1) and comprises a transition cavity (B) in a downward closing shape;

the nose part (3) is connected with the transition connecting assembly (2) and the bottom end of the nose part extends downwards; and

a noise reduction assembly disposed at least partially in the transition cavity (B).

2. The range hood of claim 1, wherein the noise reduction assembly comprises a noise reflection plate (5) disposed in the transition chamber (B), the noise reflection plate (5) being obliquely disposed to reflect noise sound waves toward the rack chamber (a) directly below the fan assembly (4).

3. A range hood according to claim 2, wherein the noise reducing assembly comprises a sound absorbing element (6) arranged on the back of the noise reflection plate (5).

4. The range hood according to claim 2, wherein the noise reduction assembly comprises a noise absorption member (7) disposed in the housing cavity (a) directly below the fan assembly (4), the noise absorption member (7) being disposed in spaced relation to the noise reflection plate (5) to absorb reflected noise sound waves.

5. A range hood according to claim 4, characterized in that the noise absorbing member (7) comprises a mesh plate for forming a Helmholtz resonator, on which a plurality of sound absorbing mesh holes (71) are distributed and arranged therethrough.

6. The range hood according to claim 5, wherein the noise absorbing member (7) comprises a sound absorbing member (6) provided at a rear surface of the mesh plate and absorbing noise waves passing through the sound absorbing mesh (71).

7. The range hood according to claim 5, wherein the mesh plate is connected to the fan bottom of the fan assembly (4) at the top end and to the frame back panel (11) of the frame portion (1) at the bottom end.

8. The range hood according to any one of claims 2 to 7, wherein the bottom of the fan assembly (4) is inclined backwards relative to the top of the fan.

9. The range hood according to claim 8, wherein the nose front side wall (32) at the top of the nose portion (3) is formed with a nose side wall opening (321) with a forward opening, the transition connection assembly (2) comprises a slant cover (21) with a rear end covering the nose side wall opening (321) and a front end extending towards the front of the bottom end of the frame portion (1), the transition cavity (B) is formed in the slant cover (21), and the noise reflection plate (5) extends obliquely upwards from below the nose side wall opening (321) towards the front of the bottom end surface of the frame portion (1).

10. The range hood of claim 8, wherein the range hood comprises at least one of:

the first method is as follows: the rack part (1) and the nose part (3) are both cubic and aligned in rear end, and the thickness of the rack part (1) is greater than that of the nose part (3) along the front and rear directions of the range hood;

the second method comprises the following steps: a cigarette sucking port (31) of a cigarette machine with a forward inclined downward opening is formed at the bottom end of the nose part (3);

the third method comprises the following steps: the extension line of the perpendicular bisector of the noise reflection plate (5) passes through the fan assembly (4).

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