CN110274275B - Noise-reducing type range hood - Google Patents
Noise-reducing type range hood Download PDFInfo
- Publication number
- CN110274275B CN110274275B CN201810206511.7A CN201810206511A CN110274275B CN 110274275 B CN110274275 B CN 110274275B CN 201810206511 A CN201810206511 A CN 201810206511A CN 110274275 B CN110274275 B CN 110274275B
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- China
- Prior art keywords
- side plate
- plate
- noise reduction
- front side
- range hood
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- 230000009467 reduction Effects 0.000 claims abstract description 64
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims abstract 2
- 238000005192 partition Methods 0.000 claims description 29
- 238000009434 installation Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000003517 fume Substances 0.000 description 4
- 238000010411 cooking Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000036541 health Effects 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)
- Ventilation (AREA)
Abstract
The utility model provides a type of making an uproar range hood falls, install the device of making an uproar falls on the fan apron, the device of making an uproar falls includes posterior lateral plate and preceding curb plate, posterior lateral plate and preceding curb plate all are discoid, be equipped with the first baffle that is spoke form distribution on posterior lateral plate leading flank, it has the hole of making an uproar to open on the quotation between the adjacent first baffle, be equipped with the second baffle that is spoke form distribution on the trailing flank of preceding curb plate, the second baffle is located between two adjacent first baffles, be equipped with the hole of making an uproar falls between second baffle and the adjacent first baffle, and, preceding curb plate and posterior lateral plate can do circumference relative motion under actuating mechanism's drive. When the front side plate and the rear side plate of the range hood do circumferential opposite movement, the volume of the noise reduction cavity between the first baffle plate and the second baffle plate is changed, 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 the stepless adjustment of the volume of the noise reduction 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, airflow is accelerated to rise, and the airflow 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 rear side plate and a front side plate which are matched with each other, wherein the rear side plate and the front side plate are disc-shaped, a first partition plate which is distributed in a spoke shape is arranged on the front side surface of the rear side plate, noise reduction holes are formed in the disc surfaces between the adjacent first partition plates, a second partition plate which is distributed in a spoke shape is arranged on the rear side surface of the front side plate, the second partition plate is arranged between the two adjacent first partition plates, noise reduction holes are formed between the second partition plate and the adjacent first partition plates, and the front side plate and the rear side plate can do circumferential relative movement under the driving of a driving mechanism.
In order to improve the noise reduction effect, a mounting window opposite to the air inlet of the fan is formed in the fan cover plate, and the rear side plate and the front side plate are arranged at positions corresponding to the mounting window.
In order to realize uniform noise reduction of the noise reduction device, the included angle between two adjacent first partition plates is equal to the included angle between two adjacent second partition plates.
In order to increase the adjustment range of the noise reduction frequency as much as possible, the noise reduction holes on the disk surface between two adjacent first partition plates are arranged in a row along the radial direction, and the row of noise reduction holes is adjacent to one of the first partition plates.
Preferably, the rear side plate is a movable plate, the front side plate is a fixed plate, and the rear side plate moves circumferentially relative to the front side plate under the drive of the driving mechanism.
As a preferable scheme that the rear side plate is a movable plate, the driving mechanism comprises a motor, a screw and a gear, wherein the motor, the screw and the gear are arranged on the front side plate, the screw is fixed on an output shaft of the motor, the gear is meshed with the screw, a central through hole is formed in the center of the front side plate, a mounting shaft is arranged in the center of the rear side plate, the mounting shaft penetrates through the central through hole and extends out of the front side plate, and the gear is fixed at the front end of the mounting shaft.
As another preferable scheme that the rear side plate is a movable plate, the driving mechanism comprises a motor and a connecting rod, the motor is mounted on the front side of the front side plate, the outer end of the connecting rod is fixed on the outer periphery of the rear side plate, and the inner end of the connecting rod is mounted on an output shaft of the motor.
As another preferable mode that the rear side plate is a movable plate, the driving mechanism comprises a motor, a central through hole is formed in the center of the front side plate, and an output shaft of the motor penetrates through the central through hole backwards and is fixed in the center of the rear side plate.
Further preferably, the rear side plate is a fixed plate, the front side plate is a movable plate, and the front side plate moves circumferentially relative to the rear side plate under the drive of the driving mechanism.
As the preferable of any scheme, the 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: when the front side plate and the rear side plate of the noise reduction type range hood do circumferential opposite movement, the included angle between the first baffle plate and the second baffle plate can be changed, the volume of the noise reduction cavity between the first baffle plate and the second baffle plate can be changed, the resonance frequency of the noise reduction cavity can be identical to or matched with the wind noise frequency generated by different gears of the range hood according to the Helmholtz resonance principle, 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 view illustrating an internal structure of a blower according to a first embodiment of the present invention;
FIG. 4 is an exploded perspective view of a noise reduction device according to an embodiment of the invention;
FIG. 5 is a schematic view of a structure of a noise reduction cavity with a smaller volume according to an embodiment of the present invention;
FIG. 6 is a schematic view of a structure of a noise reduction cavity with a large volume according to an embodiment of the present invention;
fig. 7 is a schematic diagram of an installation structure of a driving mechanism according to a second embodiment of the present invention;
FIG. 8 is an exploded perspective view of FIG. 7;
fig. 9 is a schematic diagram of a mounting structure of a driving mechanism according to a third embodiment of the present invention.
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 6, 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 a front side of the fan 2, a fan cover plate 3 provided on a front side of the fan frame 1, a noise reduction device 4 provided on the fan cover plate 3, the noise reduction device 4 including a rear side plate 41 and a front side plate 42 fitted with each other, a mounting window 31 provided on the fan cover plate 3 opposite to the fan air inlet 21, and the rear side plate 41 and the front side plate 42 provided at positions corresponding to the mounting window 31. A fume collecting hood 6 is arranged below the fan frame 1, and the fume collecting hood 6 is provided with an air inlet communicated with the fan air inlet 21.
In this embodiment, the rear side plate 41 and the front side plate 42 are both disc-shaped, the front side surface of the rear side plate 41 is provided with first partition plates 411 distributed in spoke shape, noise reduction holes 412 are formed in the disc surface between adjacent first partition plates 411, the noise reduction holes 412 are arranged in a row along the radial direction, and the noise reduction holes in the row are adjacent to one of the first partition plates 411. The second partition plates 421 which are distributed in a spoke shape are arranged on the rear side surface of the front side plate 42, the included angle between two adjacent first partition plates 411 is equal to the included angle between two adjacent second partition plates 421, the second partition plates 421 are arranged between the two adjacent first partition plates 411, the space between the adjacent first partition plates 411 and the second partition plates 421 which are paired forms a noise reduction cavity 43, and each noise reduction cavity 43 is provided with a row of noise reduction holes 412 to form a Helmholtz resonant cavity.
According to the Helmholtz resonance principle, the resonance frequency of each independent noise reduction cavity isc is sound velocity, S is the area of the corresponding noise reduction hole, V is the volume of the noise reduction cavity, and L is the effective neck length of the noise reduction hole. Therefore, under the condition that other parameters are unchanged, the volume of the noise reduction cavity is increased, the resonance frequency f is reduced, and conversely, the volume of the noise reduction cavity is reduced, and the resonance frequency f is increased. 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 this embodiment, the rear side plate 41 is a movable plate, the front side plate 42 is a fixed plate, and the rear side plate 41 moves circumferentially relative to the front side plate 42 under the drive of the drive mechanism. Specifically, the driving mechanism includes a motor 51 provided on the front side of the front side plate 42, a screw 52 and a gear 53, the screw 52 is fixed on the output shaft of the motor 51, the gear 53 is engaged with the screw 52, a central through hole 422 is provided in the center of the front side plate 42, a mounting shaft 413 is provided in the center of the rear side plate 41, the mounting shaft 413 passes forward through the central through hole 422 and protrudes from the front side plate 42, the gear 53 is fixed on the front end of the mounting shaft 413, and the gear 53 rotates synchronously with the mounting shaft 413.
In operation, the rear side plate 41 is rotated relative to the front side plate 42 by the motor 41, thereby infinitely adjusting the volume of the noise reduction chamber 43. As shown in fig. 5, the included angle α between the first partition 411 and the second partition 421 is smaller, at this time, the volume of the corresponding noise reduction cavity 43 is smaller, the resonance frequency of the noise reduction cavity 43 is larger, and this state is suitable for the high range of the range hood; as shown in fig. 6, the included angle β between the first partition 411 and the second partition 421 is larger, at this time, the volume of the corresponding noise reduction chamber 43 is larger, the resonance frequency of the noise reduction chamber 43 is smaller, and this state is suitable for the low range of the range hood.
Embodiment two:
as shown in fig. 7 and 8, the driving mechanism in the present embodiment includes a motor 51 and a link 54, the motor 51 is mounted on the front side of the front side plate 42, the outer end of the link 54 is fixed on the outer periphery of the rear side plate 41, and the inner end of the link 54 is mounted on the output shaft of the motor 51. In operation, the motor 51 drives the rear side plate 41 to rotate via the link 54. The working principle is the same as that of the first embodiment, and will not be described here.
Embodiment III:
as shown in fig. 9, the driving mechanism includes a motor 51, a center through hole 423 is opened in the center of the front side plate 42, and an output shaft of the motor 51 passes through the center through hole 423 and is fixed in the center of the rear side plate 41. In operation, the motor 51 directly rotates the rear side plate 41, and the operation principle thereof is the same as that of the first embodiment, and will not be described here.
Claims (9)
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): noise reduction device (4) are including posterior lateral plate (41) and preceding curb plate (42) that mutually support, posterior lateral plate (41) and preceding curb plate (42) all are discoid, are equipped with first baffle (411) that are spoke-like distribution on the leading flank of posterior lateral plate (41), open in the quotation between adjacent first baffle (411) has noise reduction hole (412), are equipped with second baffle (421) that are spoke-like distribution on the trailing flank of anterior curb plate (42), second baffle (421) are located between two adjacent first baffles (411), are equipped with between second baffle (421) and the adjacent first baffle (411) noise reduction hole (412), and, anterior lateral plate (42) and posterior lateral plate (41) can make circumference relative motion under the drive of actuating mechanism (5), still including collection petticoat pipe (6), collection petticoat pipe (6) are installed in the below of fan frame (1), and collection petticoat pipe (6) have the air intake that is linked together with fan air intake (21).
2. The noise reduction range hood of claim 1, wherein: the fan cover plate (3) is provided with a mounting window (31) opposite to the fan air inlet (21), and the rear side plate (41) and the front side plate (42) are arranged at positions corresponding to the mounting window (31).
3. The noise reduction range hood of claim 1, wherein: the included angle between two adjacent first partition boards (411) is equal to the included angle between two adjacent second partition boards (421).
4. A noise reducing range hood according to claim 3, wherein: noise reduction holes (412) on the disk surface between two adjacent first partition plates (411) are arranged in a row along the radial direction, and the row of noise reduction holes is adjacent to one of the first partition plates (411).
5. The noise reduction range hood of claim 1, wherein: the rear side plate (41) is a movable plate, the front side plate (42) is a fixed plate, and the rear side plate (41) moves circumferentially relative to the front side plate (42) under the drive of the driving mechanism.
6. The noise-reducing range hood of claim 5, wherein: the driving mechanism (5) comprises a motor (51), a screw rod (52) and a gear (53) which are arranged on the front side plate, the screw rod (52) is fixed on an output shaft of the motor (51), the gear (53) is meshed with the screw rod (52), a central through hole (422) is formed in the center of the front side plate (42), an installation shaft (413) is arranged in the center of the rear side plate (41), the installation shaft (413) passes through the central through hole (422) forwards and extends out of the front side plate (42), and the gear (53) is fixed at the front end of the installation shaft (413).
7. The noise-reducing range hood of claim 5, wherein: the driving mechanism (5) comprises a motor (51) and a connecting rod (54), the motor (51) is mounted on the front side of the front side plate (42), the outer end of the connecting rod (54) is fixed on the outer periphery of the rear side plate (41), and the inner end of the connecting rod (54) is mounted on an output shaft of the motor (51).
8. The noise-reducing range hood of claim 5, wherein: the driving mechanism (5) comprises a motor (51), a central through hole (423) is formed in the center of the front side plate (42), and an output shaft of the motor (51) penetrates through the central through hole (423) backwards and is fixed in the center of the rear side plate (41).
9. The noise reduction range hood of claim 1, wherein: the rear side plate (41) is a fixed plate, the front side plate (42) is a movable plate, and the front side plate (42) moves circumferentially relative to the rear side plate (41) under the drive of the driving mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810206511.7A CN110274275B (en) | 2018-03-13 | 2018-03-13 | Noise-reducing type range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810206511.7A CN110274275B (en) | 2018-03-13 | 2018-03-13 | Noise-reducing type range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110274275A CN110274275A (en) | 2019-09-24 |
| CN110274275B true CN110274275B (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810206511.7A Active CN110274275B (en) | 2018-03-13 | 2018-03-13 | Noise-reducing type range hood |
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| Country | Link |
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| CN (1) | CN110274275B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202010015535U1 (en) * | 2010-11-18 | 2011-01-13 | Basf Se | Radiant ceiling panels with improved dispersion characteristics |
| CN105509119A (en) * | 2016-02-18 | 2016-04-20 | 广东美的厨房电器制造有限公司 | Noise reduction device and extractor hood |
| CN105570201A (en) * | 2016-02-29 | 2016-05-11 | 宁波方太厨具有限公司 | Noise reduction flow collector used for centrifugal fan in range hood |
| CN206330187U (en) * | 2016-12-29 | 2017-07-14 | 宁波方太厨具有限公司 | A kind of single air-inlet range hood |
| CN208090760U (en) * | 2018-03-13 | 2018-11-13 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
-
2018
- 2018-03-13 CN CN201810206511.7A patent/CN110274275B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202010015535U1 (en) * | 2010-11-18 | 2011-01-13 | Basf Se | Radiant ceiling panels with improved dispersion characteristics |
| CN105509119A (en) * | 2016-02-18 | 2016-04-20 | 广东美的厨房电器制造有限公司 | Noise reduction device and extractor hood |
| CN105570201A (en) * | 2016-02-29 | 2016-05-11 | 宁波方太厨具有限公司 | Noise reduction flow collector used for centrifugal fan in range hood |
| CN206330187U (en) * | 2016-12-29 | 2017-07-14 | 宁波方太厨具有限公司 | A kind of single air-inlet range hood |
| CN208090760U (en) * | 2018-03-13 | 2018-11-13 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood |
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| Publication number | Publication date |
|---|---|
| CN110274275A (en) | 2019-09-24 |
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