CN212987337U

CN212987337U - Fume exhaust fan

Info

Publication number: CN212987337U
Application number: CN202021566174.1U
Authority: CN
Inventors: 胡克吉
Original assignee: Hisense Guangdong Kitchen and Bath System Co Ltd
Current assignee: Hisense Guangdong Kitchen and Bath System Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-04-16
Anticipated expiration: 2030-07-31

Abstract

The utility model discloses a range hood for reduce range hood's noise at work, and improve range hood's intake. The range hood comprises a rack, a fan assembly and a silencing and flow guiding piece. The fan assembly and the silencing and flow guiding assembly are arranged in the frame. The noise-reduction flow-guide component comprises a flow-guide part and noise-reduction materials. The guide part is provided with a first guide plate and a second guide plate, the first guide plate is positioned below the fan assembly, the lower edge of the first guide plate is connected with the inner wall of the rack, and the first guide plate inclines upwards. The second guide plate is arranged above the first guide plate, the lower edge of the second guide plate is connected with the upper edge of the first guide plate, and the upper edge of the second guide plate is connected with the inner wall of the rack. The sound deadening material is provided between the first guide plate and the second guide plate.

Description

Fume exhaust fan

Technical Field

The utility model relates to a range hood technical field especially relates to a range hood.

Background

A range hood is an electric appliance for purifying kitchen environment. The exhaust ventilator is arranged above a kitchen range, can rapidly exhaust the waste gas burnt by the range and the oil fume harmful to human bodies generated in the cooking process, reduces indoor air pollution, purifies air, and has the safety guarantee effects of gas defense and explosion prevention.

The range hood comprises a fume collecting hood and a frame arranged above the fume collecting hood, and a fan assembly is arranged in the frame. The fan subassembly includes the casing and locates the fan in the casing. When the fan operates, a negative pressure area can be generated in the volute, oil smoke can enter the rack from the smoke collecting hood under the attraction of the negative pressure area, and then is collected by the shell and guided to be discharged outdoors after being accelerated by the fan. Because space mutation exists between the smoke collecting hood and the rack, when oil smoke flows into the rack from the smoke collecting hood, vortex can appear under the machine shell, so that the smoke inlet amount of the range hood is reduced, and the working noise of the range hood is increased simultaneously, as shown in fig. 1.

In order to reduce the working noise of the range hood and increase the air intake of the range hood, in the prior art, referring to fig. 1 and 2, an air deflector 6 is arranged at the lower part of a volute 3, an inner cavity is formed between the air deflector 6 and the volute 2, second sound-absorbing cotton is filled in the inner cavity, and micropores communicated with the inner cavity are formed in the air deflector 6. At the moment, the air deflector 6 can guide the oil smoke to enter the front air inlet 31 and the rear air inlet 32 of the volute more smoothly, and meanwhile, the air deflector 6 can also absorb part of noise generated when the oil smoke enters the rack from the smoke collecting hood, so that the working noise of the range hood can be reduced, and the air intake of the range hood is increased.

However, after the air deflector 6 is arranged, the flow guiding effect of the air deflector 6 is limited, and the problem that vortices occur under the machine shell due to space mutation between the fume collecting hood and the machine frame cannot be solved, so that the range hood still has small air inlet volume and large working noise during working.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a range hood reduces range hood's noise at work, improves range hood's intake simultaneously.

In order to achieve the purpose, the utility model provides a range hood. The range hood comprises a rack, a fan assembly and a silencing and flow guiding assembly. The fan assembly and the silencing and flow guiding piece are arranged in the rack. The silencing and flow guiding assembly comprises a flow guiding piece and a silencing material; the flow guide part is provided with a first guide plate and a second guide plate, the first guide plate is positioned below the fan assembly, the lower edge of the first guide plate is connected with the inner wall of the rack, and the first guide plate is inclined; the second guide plate is arranged above the first guide plate, the lower edge of the second guide plate is connected with the upper edge of the first guide plate, and the upper edge of the second guide plate is connected with the inner wall of the rack.

The silencing material is arranged between the first guide plate and the second guide plate, and the first guide plate is provided with a through hole.

Compared with the prior art, the utility model provides an among the range hood, the water conservancy diversion spare has first deflector and second deflector, and first deflector is located the below of fan subassembly, and the lower limb of first deflector and the interior wall connection of frame, first deflector tilt up. The second deflector is located the top of first deflector, and the lower limb of second deflector is connected with the top edge of first deflector, the top edge of second deflector extends to the direction that is close to the inner wall of support, therefore, when the oil smoke enters into the frame from the collection petticoat pipe, first deflector and the cooperation of second deflector, can rationally guide the direction removal of oil smoke gas stream along first deflector and second deflector, produce the swirl when avoiding the oil smoke to enter into the frame from the collection petticoat pipe, thereby can promote range hood's intake, reduce range hood's noise at work.

Simultaneously, noise reduction material is located between first deflector and the second deflector for the noise that produces when the oil smoke gets into to the frame in from the collection petticoat pipe can be eliminated by noise reduction material, thereby can further reduce range hood's noise at work.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

FIG. 1 is a schematic view of a vortex generated by cooking fumes entering a rack from a fume collection hood in the prior art;

FIG. 2 is a schematic structural diagram of a range hood in the prior art;

fig. 3 is a schematic structural diagram of a range hood according to an embodiment of the present invention;

fig. 4 is a second schematic structural diagram of a range hood according to an embodiment of the present invention;

fig. 5 is an installation schematic view of the silencing and flow-guiding assembly in the range hood provided by the embodiment of the present invention;

fig. 6 is an installation schematic view of the silencing and flow-guiding assembly in the range hood provided by the embodiment of the present invention;

fig. 7 is a schematic structural view of a flow guide member in the range hood according to the embodiment of the present invention;

fig. 8 is a schematic structural view of the first guide plate in the range hood provided by the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

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

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

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

The process of the range hood for sucking the oil smoke completely follows the principle of air hydrodynamics: in two adjacent space regions, as long as there is a pressure difference, the gas flows from a place where the pressure is high to a place where the pressure is low. When the range hood is in a working state, air in the range hood is exhausted outdoors, so that a negative pressure area with a large pressure difference with the surrounding area is formed in the range hood. At this time, the cooking fumes are sucked into the range hood by the negative pressure region and discharged to the outside while rising.

Based on this, as shown in fig. 3 to 5, the range hood includes a rack 100, a fan assembly 200 disposed in the rack 100, and a smoke outlet assembly. The blower assembly 200 includes a volute 210, an impeller 220 disposed within the volute 210, and a motor 230 for driving the impeller 220 to rotate relative to the volute 210, and the smoke discharge assembly is in communication with an air outlet of the volute 210. When the motor 230 drives the impeller 220 to rotate, air in the housing 100 can be exhausted to the outside through the smoke exhaust assembly, thereby generating a negative pressure region in the housing 100. At this time, the oil smoke can be sucked into the rack 100 by the negative pressure area, then oil-gas separation is carried out in the rack, oil particles are condensed into oil drops and then collected through an oil path, and the purified smoke is discharged outdoors.

Meanwhile, in order to accommodate cooking fumes which cannot be exhausted before and after, referring to fig. 3 to 5, a fume collecting hood 400 is generally provided below the machine frame 100. The appearance of collection petticoat pipe is the infundibulate, and the less one end of area of collection petticoat pipe 400 is connected with the inlet flue of frame 100, and the great one end opening of collection petticoat pipe 400 area for the oil smoke can get into and hold in collection petticoat pipe 400. At this time, the oil smoke can be contained in the smoke collecting cover 400 under the negative pressure, and the phenomenon of overflowing and diffusion of a large amount of oil smoke is prevented.

Based on the above-mentioned range hood mechanism, when the range hood works, the control motor 230 drives the impeller 220 to rotate, so that the impeller 220 can discharge the air in the rack 100 to the outside through the smoke discharge assembly, thereby generating a negative pressure region in the rack 100. The rising oil smoke can be sucked by the negative pressure region and enter the machine frame 100 through the smoke collecting cover 400. Then, the oil smoke is subjected to oil-gas separation under the centrifugal action of the impeller 220, grease particles in the oil smoke are thrown to the inner wall of the oil smoke channel by virtue of centrifugal force, the grease particles are condensed into oil drops to be collected through an oil path, and the purified smoke is accelerated by the impeller 220 and then is discharged out of a room through the smoke outlet assembly.

However, since the air inlet of the smoke collecting cover 400 is larger than the air inlet of the bracket, a space mutation exists between the smoke collecting cover 400 and the rack 100, so that when oil smoke enters the rack 100 from the smoke collecting cover 400, a vortex is formed in the rack 100, which reduces the air inlet of the range hood and increases the working noise of the range hood.

In order to eliminate the vortex generated when the oil smoke enters the rack 100 from the smoke collecting hood 400, the working noise of the range hood is reduced, and the air intake of the range hood is increased at the same time, see fig. 3 to 8.

The range hood comprises a frame 100, a fan assembly 200 and a silencing and flow guiding assembly 300. Wherein, the sound-deadening flow-guiding assembly 300 comprises a flow-guiding member 310 and a sound-deadening material 320. It should be understood that the kind of the sound absorbing material 320 may be selected according to actual circumstances as long as it can absorb noise. For example: the sound-absorbing material 320 may be polystyrene perlite, ethylene propylene diene monomer rubber, sponge, etc.

The guide member 310 has a first guide plate 311 and a second guide plate 312, the first guide plate 311 is located below the blower fan assembly 200, a lower edge of the first guide plate 311 is connected to an inner wall of the frame 100, and the first guide plate 311 is upwardly inclined. The second guide plate 312 is disposed above the first guide plate 311, a lower edge of the second guide plate 312 is connected to an upper edge of the first guide plate 311, and an upper edge of the second guide plate 312 is connected to an inner wall of the rack 100. It should be noted that the space defined by the air guiding member 310 and the first side wall of the rack 100 may be a sealed structure or an open structure.

It should be understood that the housing 100 is generally rectangular, such that the housing 100 has four interior walls. The number of the above-mentioned silencing and guiding assemblies 300 can be selected according to actual conditions. For example, the number of the silencing and guiding assemblies 300 may be four, four silencing and guiding assemblies 300 are respectively corresponding to four inner walls of the rack 100, and the first guide plate 311 and the second guide plate 312 in each silencing and guiding assembly 300 are respectively connected to the corresponding inner wall of the silencing and guiding assembly 300.

Of course, the number of the silencing and guiding assemblies 300 may also be two, the two silencing and guiding assemblies 300 respectively correspond to any two opposite side walls of the rack 100 one by one, and the first guide plate 311 and the second guide plate 312 in each silencing and guiding assembly 300 are connected to the corresponding inner walls of the silencing and guiding assemblies 300.

The sound deadening material 320 is provided between the first guide plate 311 and the second guide plate 312, and the first guide plate 311 is provided with a plurality of through holes. It should be understood that the through holes may be uniformly opened on the first guide plate 311, or may be discretely distributed on the first guide plate 311.

When the range hood sucks oil smoke, the fan assembly 200 is controlled to work, so that air in the rack 100 is sucked to the outside, and a negative pressure area is formed in the rack 100. At this time, the oil smoke below the smoke collecting cover 400 enters the smoke collecting cover 400 by the suction of the negative pressure region, and then enters the machine frame 100 from the inside of the smoke collecting cover 400. The first guide plate 311 and the second guide plate 312 can guide the oil smoke, so that the oil smoke can move along the first guide plate 311 and the second guide plate 312 to be discharged outside by the fan assembly 200 with acceleration.

Meanwhile, noise generated when the range hood enters the housing 100 from the smoke collecting hood 400 is eliminated by the silencing material 320.

Known by above-mentioned range hood's structure and range hood's working process, the utility model provides a range hood's water conservancy diversion spare 310 includes first deflector 311 and second deflector 312, and first deflector 311 is located the below of fan subassembly 200, and the lower limb of first deflector 311 and the interior wall connection of frame 100, first deflector 311 tilt up. The second deflector 312 is arranged above the first deflector 311, the lower edge of the second deflector 312 is connected with the upper edge of the first deflector 311, the upper edge of the second deflector 312 is connected with the inner wall of the frame 100, so that the oil smoke enters the frame 100 from the smoke collecting hood 400, the first deflector 311 is matched with the second deflector 312, the oil smoke can be reasonably guided to move along the directions of the first deflector 311 and the second deflector 312, the oil smoke is prevented from generating vortexes when entering the frame 100 from the smoke collecting hood 400, the air intake of the range hood can be improved, and the working noise of the range hood is reduced.

Meanwhile, the silencing material 320 is disposed between the first guide plate 311 and the second guide plate 312, so that noise generated when the oil smoke enters the machine frame 100 from the smoke collection cover 400 can be eliminated by the silencing material 320, and thus the operating noise of the range hood can be further reduced.

As a possible implementation manner, referring to fig. 3 to 8, the first guide plate 311 and the second guide plate 322 are both provided with sound deadening through holes. The silencing through holes can be uniformly distributed on the first guide plate and the second guide plate, and also can be discretely distributed on the first guide plate and the second guide plate.

At this time, noise generated when the oil smoke enters the rack 100 from the smoke collecting hood 400 can pass through the silencing through holes to be eliminated by the silencing material 320, so that the working noise of the range hood can be further reduced.

For example, in order to further improve the noise elimination effect of the sound-deadening material 320, a sealed cavity is formed between the flow guide and the inner wall of the frame 100, the sound-deadening material 320 is disposed in the cavity, and the first through hole is communicated with the cavity. At this moment, a sealed cavity is formed between the flow guide piece and the inner wall of the machine frame 100, so that noise entering the flow guide piece through the silencing through hole can be prevented from escaping from the flow guide piece, noise generated when the oil smoke flows into the machine frame 100 from the smoke collection cover 400 can enter the cavity through the through hole, and then the oil smoke is completely absorbed by the silencing material 320, and the working noise of the range hood can be further reduced.

Also, the sound attenuating material 320 may fill the entire cavity or may partially fill the cavity. When the whole cavity is filled with the silencing material 320, the silencing coefficient of the silencing material 320 can be improved, so that the silencing effect of the silencing flow guide assembly 300 can be further improved, and the working noise of the range hood can be further reduced.

As a possible implementation manner, referring to fig. 3 to 8, in order to ensure that the silencing through holes can absorb noise generated when the oil smoke enters the rack 100 from the smoke collecting hood 400 and noise generated when the fan assembly 200 operates, and simultaneously prevent excessive oil smoke from entering the cavity through the silencing through holes, the diameter of the silencing through holes is 2mm to 4 mm. At this time, the silencing through holes can effectively absorb noise generated when the oil smoke enters the rack 100 from the smoke collecting hood 400 and noise generated when the fan assembly 200 operates, especially low and medium frequency noise, and can prevent excessive oil smoke from entering the cavity, so that the oil smoke is attached to the silencing material 320 to weaken the silencing capability of the silencing material 320.

Simultaneously, the diameter of two adjacent amortization through-holes is 1mm ~ 6mm, can further promote the adsorption effect of amortization through-hole to the noise.

As an example, referring to fig. 3 to 8, when the moving speed of the soot is different, the size of the vortex generated when the soot enters the supporter from the soot collecting cover 400 is also different. In order to better guide the oil smoke, the included angle between the first guide plate 311 and the side wall of the rack 100 is 45 ° to 60 °, and the included angle between the first guide plate 311 and the second guide plate 312 is 30 ° to 150 °.

Specifically, referring to fig. 3 to 8, the distance between the upper edge of the first guide plate 311 and the inner wall of the rack 100 is 20mm to 150mm, and at this time, the first guide plate 311 and the second guide plate 312 can better fit the flow direction of the soot, so that the first guide plate 311 and the second guide plate 312 can better guide the soot.

As a possible implementation manner, the above-mentioned silencing material 320 is silencing cotton, and because the silencing cotton has a better adsorption effect on the middle-high frequency noise, the silencing cotton and the silencing through hole can cooperate to eliminate most of the middle-high frequency noise.

As an example, referring to fig. 3 to 8, the fan assembly 200 includes a volute 210, an impeller 220, and a motor 230, the volute 210 is fixed on the frame 100, the impeller 220 is disposed in the volute 210, and the motor 230 is configured to drive the impeller 220 to rotate relative to the volute 210. The noise-reducing guide assembly 300 is provided on an inner wall parallel to the axis of the impeller 220.

When the fan assembly 200 has the scroll 210, the impeller 220 and the fan, since the lower wall of the scroll 210 is arc-shaped, when the soot enters the rack 100 from the soot collecting cover 400, vortex flows are easily generated at the lower portion of the scroll 210 and at both sides of the axis of the impeller 220. At this time, the silencing guide assembly 300 is arranged on the inner wall of the frame 100 parallel to the axis of the impeller 220, so that the silencing guide assembly 300 can effectively guide the oil smoke, and the noise generated when the oil smoke enters the frame 100 from the smoke collecting hood 400 is reduced.

It should be noted that one or two air inlets of the volute 210 may be provided, and the determination is performed according to actual situations. When the number of the air inlets of the turbine is two, the volute 210 can intake air in a front-back two-way manner, so that the volute 210 has a larger air intake area, noise generated when oil smoke enters the volute 210 from the rack 100 can be reduced, and the working noise of the range hood can be further reduced.

Specifically, referring to fig. 3 to 8, the range hood includes two silencing guide assemblies 300, the two silencing guide assemblies 300 are respectively located at two sides of the axis of the impeller 220, and the two silencing guide assemblies 310 are matched to eliminate vortices at two sides of the axis of the impeller 220, so as to further eliminate vortices generated when the oil smoke enters the rack 100 from the smoke collection cover 400.

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

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

Claims

1. A range hood, comprising:

a frame;

the fan assembly is arranged in the rack;

the silencing and flow guiding assembly is arranged in the rack and comprises a flow guiding piece and a silencing material; the flow guide part is provided with a first guide plate and a second guide plate, the first guide plate is positioned below the fan assembly, the lower edge of the first guide plate is connected with the inner wall of the rack, and the first guide plate is inclined upwards; the second guide plate is arranged above the first guide plate, the lower edge of the second guide plate is connected with the upper edge of the first guide plate, and the upper edge of the second guide plate is connected with the inner wall of the rack;

the sound deadening material is provided between the first guide plate and the second guide plate.

2. The range hood of claim 1, wherein the first guide plate and the second guide plate are both provided with sound absorption through holes.

3. The range hood of claim 2, wherein a sealed cavity is formed between the flow guide member and the inner wall of the frame, the sound-absorbing material is disposed in the cavity, and the sound-absorbing through hole is communicated with the cavity.

4. The range hood of claim 2, wherein the sound absorption through holes have a diameter of 2mm to 4 mm.

5. The range hood of claim 2, wherein the center distance between two adjacent sound absorption through holes is 1mm to 6 mm.

6. The range hood of claim 1, wherein an included angle between the first guide plate and the side wall of the rack is 45 ° to 60 °, and/or an included angle between the first guide plate and the second guide plate is 30 ° to 150 °.

7. The range hood of claim 1, wherein the distance between the upper edge of the first guide plate and the inner wall of the frame is 20mm to 150 mm.

8. The range hood of claim 1, wherein the sound attenuating material is sound attenuating cotton.

9. The range hood according to any one of claims 1 to 8, wherein the fan assembly comprises a volute, an impeller and a motor, the volute is fixed on the frame, the impeller is arranged in the volute, and the motor is used for driving the impeller to rotate relative to the volute;

the silencing and flow guiding assembly is arranged on the inner wall parallel to the axis of the impeller.

10. The range hood of claim 9, wherein the range hood comprises two of the noise reduction flow guide assemblies, and the two noise reduction flow guide assemblies are respectively located at two sides of an axis of the impeller.