CN110274270B - Noise-reducing type range hood - Google Patents
Noise-reducing type range hood Download PDFInfo
- Publication number
- CN110274270B CN110274270B CN201810205619.4A CN201810205619A CN110274270B CN 110274270 B CN110274270 B CN 110274270B CN 201810205619 A CN201810205619 A CN 201810205619A CN 110274270 B CN110274270 B CN 110274270B
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- Prior art keywords
- noise reduction
- cover plate
- fan
- noise
- pore plate
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- 230000009467 reduction Effects 0.000 claims abstract description 142
- 239000011148 porous material Substances 0.000 claims abstract description 43
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003517 fume Substances 0.000 description 4
- 238000010411 cooking Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a range hood of making an uproar falls, includes fan frame and fan, and fan frame front side is equipped with the fan apron, installs the device of making an uproar falls on the fan apron, its characterized in that: the noise reduction device comprises a noise reduction pore plate and a cover plate component arranged on the front side of the noise reduction pore plate, noise reduction holes are formed in the noise reduction pore plate, the area where the noise reduction holes are formed corresponds to the air inlet of the fan, a noise reduction cavity is formed between the noise reduction pore plate and the cover plate component, and the noise reduction pore plate can relatively move back and forth under the driving of a cover plate component driving mechanism so as to adjust the volume of the noise reduction cavity. The noise-reducing cavity is formed between the noise-reducing pore plate and the cover plate component, the cover plate component is driven by the driving mechanism to move back and forth relatively to adjust the volume of the noise-reducing cavity, according to the Helmholtz resonance principle, the resonance frequency of the noise-reducing cavity is identical to or matched with the wind noise frequency generated by different gears of the range hood, and stepless noise reduction of the range hood can be realized through stepless adjustment of the volume of the noise-reducing cavity.
Description
Technical Field
The invention relates to a range hood, in particular to a noise reduction type range hood.
Background
Chinese cooking can generate a large amount of oil smoke, and in order to keep the kitchen environment clean and the health of human bodies, the range hood has become one of the indispensable devices of modern family kitchens. In the operation process of the range hood, the air flow moves to generate turbulence so as to generate noise, and the cooking experience and the physical health of people are affected. In order to reduce noise of the range hood, various range hoods with noise reduction structures are invented, such as a silent range hood disclosed in China patent publication No. 201310627557. X (issued publication No. CN 103697512B), wherein a sound-absorbing guide cover is arranged at a position opposite to a front air inlet of a volute, micropores are arranged on the sound-absorbing guide cover, and the sound-absorbing guide cover is obliquely arranged opposite to a rear panel of the front air inlet, so that the caliber of a front oil smoke channel between the sound-absorbing guide cover and the front air inlet of the volute is gradually reduced from bottom to top, and airflow is accelerated to rise and is guided to enter the front air inlet of the volute. Although, the micropore in this silence formula range hood has played the effect of inhaling sound and making an uproar, and the rear panel slope sets up and has played the effect of accelerating the air current, makes its quick air intake that gets into, because the noise frequency of common range hood mainly distributes around 100HZ ~ 2000HZ, belongs to low frequency noise, and the micropore board sound absorption structure has good effect of making an uproar, but has very strong selectivity to sound absorption frequency, only has good absorption to the noise near the resonance frequency, and its sound absorption frequency band is narrower in above-mentioned patent.
In addition, chinese cooking is complicated and variable, such as frying, steaming, etc., so that a common range hood is generally provided with a plurality of gears, such as a quick-frying gear, a high gear, a low gear, a mute gear, etc., to provide users with different dishes. Obviously, when the user uses different gears, the air volume suction force generated by the user is different, the noise generated by the user is also different, and the noise generated by different gears cannot be absorbed by using a single micropore for noise reduction, so that the noise reduction effect needs to be further improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing the noise reduction type range hood capable of steplessly adjusting the resonance frequency of a noise reduction cavity.
The technical scheme adopted for solving the technical problems is as follows: this range hood of making an uproar falls, including the fan frame with locate the fan in the fan frame, fan frame front side is equipped with the fan apron install noise reduction device on the fan apron, its characterized in that: the noise reduction device comprises a noise reduction pore plate and a cover plate component arranged on the front side of the noise reduction pore plate, noise reduction holes are formed in the noise reduction pore plate, the area where the noise reduction holes are formed corresponds to the air inlet of the fan, a noise reduction cavity is formed between the noise reduction pore plate and the cover plate component, and the cover plate component can relatively move back and forth to adjust the volume of the noise reduction cavity under the driving of the driving mechanism.
Preferably, the cover plate assembly comprises a fixed frame and a movable cover plate arranged in the fixed frame, wherein the fixed frame is fixed on the front side surface of the noise reduction pore plate, and the movable cover plate moves back and forth relative to the noise reduction pore plate under the driving of the driving mechanism.
As a preferred scheme, the orifice plate of making an uproar falls including the hole area of making an uproar falls with fall the hole area of making an uproar down, fixed frame include first half frame and second half frame, the fly leaf include fly leaf and lower fly leaf, go up the hole area of making an uproar falls, go up and form the cavity of making an uproar falls between first half frame and the last fly leaf, lower the hole area of making an uproar falls, lower half frame and lower fly leaf down between form the cavity of making an uproar falls, go up fly leaf and lower fly leaf and fall the orifice plate of making an uproar back and forth independent removal relatively under actuating mechanism's drive.
Further preferably, the aperture ratio of the upper noise reduction hole area is the same as the aperture ratio of the lower noise reduction hole area, and the volumes of the upper noise reduction cavity and the lower noise reduction cavity are different. In this way, noise of different frequencies can be reduced.
The driving mechanism can have various structures, preferably, the driving mechanism comprises a supporting seat, a motor, a transmission shaft, a first shaft sleeve, a second shaft sleeve, a first connecting rod and a second connecting rod, wherein the transmission shaft is arranged on the supporting seat, the motor is arranged on the supporting seat and drives the transmission shaft to rotate, the first shaft sleeve and the second shaft sleeve are arranged on the transmission shaft and synchronously rotate along with the transmission shaft, the upper movable cover plate is connected with the first shaft sleeve through the first connecting rod, the lower movable cover plate is connected with the second shaft sleeve through the second connecting rod, and the lengths of the first connecting rod and the second connecting rod are unequal, or the projections of the first shaft sleeve and the second shaft sleeve on a plane perpendicular to the transmission shaft are not overlapped with each other. Therefore, when the driving mechanism works, the upper movable cover plate and the lower movable cover plate can be driven to synchronously move, but the moving distance of the same time period is unequal, so that the volumes of the upper noise reduction cavity and the lower noise reduction cavity are different.
Further preferably, the aperture ratio of the upper noise reduction hole region and the aperture ratio of the lower noise reduction hole region are different. At this time, the volumes of the upper noise reduction cavity and the lower noise reduction cavity can be the same or different, and noise of different frequencies can be reduced.
As another preferable scheme, the noise reduction pore plate only comprises an integral noise reduction pore area, correspondingly, the fixed frame is one, and the movable cover plate is one. Thus, the noise reduction device has only one noise reduction cavity, and the structure is simpler.
Preferably, a mounting window is formed in the fan cover plate, and the noise reduction pore plate and the fan cover plate are located on the same plane and mounted on the mounting window.
Preferably, the fan cover plate forms the noise reduction pore plate. Therefore, only the noise reduction holes are needed to be directly formed in the fan cover plate, and the noise reduction device is simpler in structure.
Further preferably, the noise reduction type range hood further comprises a fume collecting hood, wherein the fume collecting hood is arranged below the fan frame and is provided with an air inlet communicated with the air inlet of the fan.
Compared with the prior art, the invention has the advantages that: the noise reduction device of the noise reduction type range hood comprises a noise reduction pore plate and a cover plate component arranged on the front side of the noise reduction pore plate, a noise reduction cavity is formed between the noise reduction pore plate and the cover plate component, the cover plate component is driven by a driving mechanism to move back and forth relatively to adjust the size of the noise reduction cavity, according to the Helmholtz resonance principle, the resonance frequency of the noise reduction cavity is identical to or matched with the wind noise frequency generated by different gears of the range hood, and the stepless noise reduction of the range hood can be realized through stepless adjustment of the volume of the noise reduction cavity.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
FIG. 2 is a cross-sectional view of a first embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating an internal structure of a first embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating an installation structure of a noise reducer according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of a noise reduction device according to a first embodiment of the present invention;
FIG. 6 is an exploded view of a noise reducer mounting structure according to a first embodiment of the present invention;
FIG. 7 is a schematic view of a driving mechanism according to a first embodiment of the present invention;
FIG. 8 is a schematic view of the structure of the first embodiment of the present invention in a state of maximum volume of the noise reduction cavity;
FIG. 9 is a schematic view of a structure of a noise reduction cavity with reduced volume according to a first embodiment of the present invention;
FIG. 10 is a schematic view of a structure of a noise reduction cavity with a minimum volume according to a first embodiment of the present invention;
FIG. 11 is a schematic diagram illustrating an installation structure of a noise reducer according to a second embodiment of the present invention;
fig. 12 is an exploded perspective view of the noise reducer of fig. 11.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
Embodiment one:
as shown in fig. 1 to 10, the noise reduction type range hood in this embodiment includes a fan frame 1 with a fan 2 mounted therein, a fan air inlet 21 provided on the front side of the fan 2, a fan cover plate 3 mounted on the front side of the fan frame 1, and a noise reduction device 4 mounted on the fan cover plate 3, with the direction indicated by an arrow a in fig. 2 as a forward direction. A fume collecting hood 7 is arranged below the fan frame 1, and the fume collecting hood 7 is provided with an air inlet communicated with a fan air inlet 21.
In this embodiment, the noise reduction device 4 includes a noise reduction orifice plate 41 and a cover plate assembly 42 provided on the front side of the noise reduction orifice plate. The fan cover plate 3 is provided with a mounting window 31, and the noise reduction pore plate 41 and the fan cover plate 3 are arranged on the same plane and mounted on the mounting window 31. The noise-reducing pore plate 41 is provided with noise-reducing holes 411, the area where the noise-reducing holes 411 are positioned corresponds to the fan air inlet 21, and a noise-reducing cavity 5 is formed between the noise-reducing pore plate 41 and the cover plate component 42. The cover plate assembly 42 comprises a fixed frame 421 and a movable cover plate 422 arranged in the fixed frame, the fixed frame 421 is fixed on the front side surface of the noise reduction pore plate 41, and the movable cover plate 422 moves back and forth relative to the noise reduction pore plate 41 under the driving of the driving mechanism 6 so as to adjust the size of the noise reduction cavity 5. In addition, the noise reduction orifice plate 41 is extended forward with a guide post 412, and a through hole 4221 for inserting the guide post 412 is provided at a corresponding position of the movable cover plate 422.
In this embodiment, the noise reduction orifice plate 41 includes an upper noise reduction orifice region 41a and a lower noise reduction orifice region 41b, the fixed frame 421 includes an upper half frame 421a and a lower half frame 421b, the movable cover 422 includes an upper movable cover 422a and a lower movable cover 422b, an upper noise reduction chamber 5a is formed between the upper noise reduction orifice region 41a, the upper half frame 421a and the upper movable cover 422a, a lower noise reduction chamber 5b is formed between the lower noise reduction orifice region 41b, the lower half frame 421b and the lower movable cover 422b, and the upper movable cover 422a and the lower movable cover 422b are independently moved forward and backward relative to the noise reduction orifice plate 41 under the driving of the driving mechanism 6.
By providing two noise reduction chambers, an upper noise reduction chamber 5a and a lower noise reduction chamber 5b, a plurality of sets of noise of different frequencies can be reduced. In the present embodiment, the aperture ratio of the upper noise reduction hole region 41a and the aperture ratio of the lower noise reduction hole region 41b are the same, and the volumes of the upper noise reduction chamber 5a and the lower noise reduction chamber 5b are different at the same time.
The driving mechanism 6 in this embodiment includes a support base 61, a motor 62, a driving shaft 63, a first shaft sleeve 64, a second shaft sleeve 65, a first link 66 and a second link 67, the driving shaft 63 is provided on the support base 61, the motor 62 is mounted on the support base 61 and drives the driving shaft 63 to rotate, the first shaft sleeve 64 and the second shaft sleeve 65 are mounted on the driving shaft 63 and rotate synchronously with the driving shaft 63, the upper movable cover 422a is connected with the first shaft sleeve 64 through the first link 66, the lower movable cover 422b is connected with the second shaft sleeve 65 through the second link 67, and the lengths of the first link 66 and the second link 67 are not equal, or the projections of the first shaft sleeve 64 and the second shaft sleeve 65 on a plane perpendicular to the driving shaft 63 do not coincide with each other.
During operation, the motor 62 drives the transmission shaft 63 to rotate, the first shaft sleeve 64 and the second shaft sleeve 65 are driven by the transmission shaft 63 to synchronously rotate, so that the first connecting rod 66 and the second connecting rod 67 are driven to synchronously rotate, and when the lengths of the first connecting rod 66 and the second connecting rod 67 are unequal, or the projections of the first shaft sleeve 64 and the second shaft sleeve 65 on the plane perpendicular to the transmission shaft are not overlapped with each other, the moving distances of the upper movable cover plate 422a and the lower movable cover plate 422b are different in the same period, so that the volumes of the upper noise reduction cavity 5a and the lower noise reduction cavity 5b are different at the same moment, and noise with different frequencies can be reduced. As shown in fig. 2, the depth of the upper noise reduction chamber 5a is D1, the depth of the lower noise reduction chamber 5b is D2, and d1+noted2 can be obtained by driving the driving mechanism 6.
By utilizing Helmholtz resonance noise reduction principle, the air column in the noise reduction hole and the air in the noise reduction cavity form an elastic resonance system, when the noise frequency of a part of the range hood is the same as the natural frequency of the resonance system, the air column in the noise reduction hole resonates and rubs with the hole wall severely, and the acoustic energy is converted into heat energy by friction, so that the purpose of noise reduction is achieved. It follows that the resonance frequency of the sound absorption peak can be controlled by changing the volume of the noise reduction cavity.
In order to realize noise reduction with different frequencies, the aperture ratio of the upper noise reduction hole region 41a and the aperture ratio of the lower noise reduction hole region 41b may be different, and the volumes of the upper noise reduction cavity 5a and the lower noise reduction cavity 5b may be equal or unequal.
In addition, the fan cover plate 3 can also form a noise reduction pore plate, namely the noise reduction pore plate is directly arranged on the fan cover plate 3, so that the noise reduction device has a simpler structure.
Embodiment two:
as shown in fig. 9 and 10, the noise reduction orifice plate 41 of the present embodiment includes only one integral noise reduction orifice area, and correspondingly, the fixed frame 421 is one, the movable cover 422 is one, and the rest of the structure and noise reduction principle are the same as those of the first embodiment, and will not be described here.
Claims (7)
1. The utility model provides a range hood of making an uproar falls, includes fan frame (1) and locates fan (2) in the fan frame, and fan frame (1) front side is equipped with fan apron (3) install noise reduction device (4), its characterized in that on fan apron (3): the noise reduction device comprises a noise reduction pore plate (41) and a cover plate component (42) arranged on the front side of the noise reduction pore plate, the noise reduction pore plate (41) is provided with a noise reduction pore plate (411), the area where the noise reduction pore plate (411) is arranged corresponds to a fan air inlet (21), a noise reduction cavity (5) is formed between the noise reduction pore plate (41) and the cover plate component (42), the cover plate component (42) can move back and forth relative to the noise reduction pore plate (41) under the driving of a driving mechanism (6) so as to adjust the volume of the noise reduction cavity (5), the cover plate component (42) comprises a fixed frame (421) and a movable cover plate (422) arranged in the fixed frame, the fixed frame (421) is fixed on the front side surface of the noise reduction pore plate (41), the movable cover plate (422) is driven by the driving mechanism to move back and forth relative to the pore plate (41), the noise reduction pore plate (41) comprises an upper noise reduction pore plate area (41 a) and a lower noise reduction pore plate area (41 b), the fixed frame (421) comprises an upper half frame (421 a) and a lower half frame (421 b), the movable cover plate (422) is arranged in the fixed frame (422), the upper half frame (422 a) and the noise reduction cavity (41 a) is formed between the upper half frame (422 a) and the movable cover plate (422 a) and the upper frame (422 a), and the noise reduction cavity (41 b) is formed between the upper part and the movable cover plate (422 a) The lower noise reduction cavity (5 b) is formed between the lower half frame (421 b) and the lower movable cover plate (422 b), the upper movable cover plate (422 a) and the lower movable cover plate (422 b) are driven by the driving mechanism (6) to move back and forth independently relative to the noise reduction pore plate (41), the fan cover plate (3) is provided with the mounting window (31), and the noise reduction pore plate (41) and the fan cover plate (3) are positioned on the same plane and are mounted on the mounting window (31).
2. The noise reduction range hood of claim 1, wherein: the opening ratio of the upper noise reduction hole area (41 a) is the same as the opening ratio of the lower noise reduction hole area (41 b), and the volumes of the upper noise reduction cavity (5 a) and the lower noise reduction cavity (5 b) are different.
3. The noise reduction range hood according to claim 2, wherein: the driving mechanism (6) comprises a supporting seat (61), a motor (62), a transmission shaft (63), a first shaft sleeve (64), a second shaft sleeve (65), a first connecting rod (66) and a second connecting rod (67), wherein the transmission shaft (63) is arranged on the supporting seat (61), the motor (62) is arranged on the supporting seat (61) and drives the transmission shaft (63) to rotate, the first shaft sleeve (64) and the second shaft sleeve (65) are arranged on the transmission shaft (63) and synchronously rotate along with the transmission shaft (63), the upper movable cover plate (422 a) is connected with the first shaft sleeve (64) through a first connecting rod (66), the lower movable cover plate (422 b) is connected with the second shaft sleeve (65) through a second connecting rod (67), and the lengths of the first connecting rod (66) and the second connecting rod (67) are unequal, or the projections of the first shaft sleeve (64) and the second shaft sleeve (65) on a plane perpendicular to the transmission shaft (63) are not overlapped with each other.
4. The noise reduction range hood of claim 1, wherein: the aperture ratio of the upper noise reduction hole region (41 a) is different from the aperture ratio of the lower noise reduction hole region (41 b).
5. The noise reduction range hood of claim 1, wherein: the noise reduction pore plate (41) only comprises an integral noise reduction pore area, correspondingly, the fixed frame (421) is one, and the movable cover plate (422) is one.
6. The noise reduction range hood of claim 1, wherein: the fan cover plate (3) forms the noise reduction pore plate (41).
7. The noise-reducing range hood according to any one of claims 1 to 6, wherein: the air-collecting hood is characterized by further comprising an air-collecting hood (7), wherein the air-collecting hood (7) is arranged below the fan frame (1) and is provided with an air inlet communicated with the air inlet (21) of the fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810205619.4A CN110274270B (en) | 2018-03-13 | 2018-03-13 | Noise-reducing type range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810205619.4A CN110274270B (en) | 2018-03-13 | 2018-03-13 | Noise-reducing type range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110274270A CN110274270A (en) | 2019-09-24 |
| CN110274270B true CN110274270B (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810205619.4A Active CN110274270B (en) | 2018-03-13 | 2018-03-13 | Noise-reducing type range hood |
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| CN (1) | CN110274270B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111023218B (en) * | 2020-01-03 | 2021-11-26 | 宁波方太厨具有限公司 | Range hood and control method thereof |
| CN112524660B (en) * | 2020-11-16 | 2022-03-18 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
| CN112484272B (en) * | 2020-11-30 | 2022-03-11 | 珠海格力电器股份有限公司 | Air conditioner control method and device and air conditioning unit |
| CN114811682A (en) * | 2022-03-30 | 2022-07-29 | 宁波方太厨具有限公司 | A subassembly and range hood of making an uproar falls for range hood |
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| CN106402974A (en) * | 2016-11-11 | 2017-02-15 | 宁波方太厨具有限公司 | Noise-reducing range hood |
| CN106871204A (en) * | 2017-03-31 | 2017-06-20 | 广东美的厨房电器制造有限公司 | Range hood |
| CN107339264A (en) * | 2017-03-15 | 2017-11-10 | 宁波方太厨具有限公司 | A kind of blower fan system auxiliary denoising device of single air-inlet range hood |
| CN208312474U (en) * | 2018-03-13 | 2019-01-01 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
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2018
- 2018-03-13 CN CN201810205619.4A patent/CN110274270B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204402717U (en) * | 2015-01-12 | 2015-06-17 | 曼胡默尔滤清器（上海）有限公司 | Modular type tuning variable-volume resonant cavity |
| CN106402974A (en) * | 2016-11-11 | 2017-02-15 | 宁波方太厨具有限公司 | Noise-reducing range hood |
| CN107339264A (en) * | 2017-03-15 | 2017-11-10 | 宁波方太厨具有限公司 | A kind of blower fan system auxiliary denoising device of single air-inlet range hood |
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