CN105756962A - Low-noise lampblack fan - Google Patents
Low-noise lampblack fan Download PDFInfo
- Publication number
- CN105756962A CN105756962A CN201610178841.0A CN201610178841A CN105756962A CN 105756962 A CN105756962 A CN 105756962A CN 201610178841 A CN201610178841 A CN 201610178841A CN 105756962 A CN105756962 A CN 105756962A
- Authority
- CN
- China
- Prior art keywords
- sound
- centrifugal fan
- absorbing block
- fan
- circumference array
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
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- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
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- 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
- F04D29/664—Sound attenuation by means of sound absorbing material
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- 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
Abstract
The invention provides a low-noise lampblack fan which comprises a centrifugal fan, wherein one end of the centrifugal fan is sealed; the sealed end of the centrifugal fan is connected with a driving motor via a shaft; the centrifugal fan is surrounded by a fan shell; an axial air inlet facing to the inner cavity of the centrifugal fan and a tangential air outlet are formed in the fan shell; sound absorption blocks made of a sound absorption material are respectively arranged between adjacent blades of the centrifugal fan; the sound absorption blocks are arranged to form a sound absorption block circular array in a blade array of the centrifugal fan; gaps are formed among the sound absorption blocks; the aperture of the axial air inlet in the fan shell is smaller than the diameter of the inner side of the sound absorption block circular array, so that air flow entering the fan shell from the axial air inlet can reach the tangential air outlet after passing through the sound absorption block circular array. In the operation process of the low-noise lampblack fan, noise in an air tube can be effectively inhibited and absorbed to be prevented from entering a room, so that a low-noise cooking environment can be achieved.
Description
Technical field
The present invention relates to field of electromechanical equipment, especially, relate to a kind of lampblack fan.
Background technology
The purposes of lampblack absorber is relatively broad, and especially for Modern Family kitchen, lampblack absorber belongs to basic kitchen electricity equipment；And in the actually used process of lampblack absorber, bigger noise being produced, composition bigger in this kind of noise comes from the vibration of airduct；In current range hood structure, the noise in airduct, directly through the fan of blower fan, by the incoming indoor of oil fume extracting opening, causes bigger noise pollution.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of low noise lampblack fan, in the course of the work, the noise that can effectively stop and absorb in airduct, to suppress its incoming indoor, thus forming low noise cooking environments for this lampblack fan.
The technical solution adopted for the present invention to solve the technical problems is: this low noise lampblack fan includes the centrifugal fan that one end is closed, and the blind end axle of described centrifugal fan is connected to drive motor；Described centrifugal fan periphery surrounds blower housing；Described blower housing has an air inlet through hollow shaft mouth towards described centrifugal fan inner chamber and a tangential air outlet；Being respectively equipped with one piece of sound-absorbing block being made up of sound-absorbing material between each adjacent flabellum of described centrifugal fan, each described sound-absorbing block Common arrangements becomes to be in the sound-absorbing block circumference array inside the flabellum array of centrifugal fan, and leaves space between each sound-absorbing block；The bore of the air inlet through hollow shaft mouth of described blower housing, less than the inside diameter of described sound-absorbing block circumference array, makes to enter the air-flow within blower housing from described air inlet through hollow shaft mouth and must get to described tangential air outlet after sound-absorbing block circumference array.
As preferably, the inner tangent line of the flabellum of described centrifugal fan is along the radial direction of centrifugal fan, so that the noise flowed through outside centrifugal fan between each adjacent flabellum flows in centrifugal fan along radial direction, just to described sound-absorbing block, to promote noise absorption efficiency.
As preferably, described sound-absorbing block is in the shoe of the flabellum towards centrifugal fan；The noise flowing to sound-absorbing block between flabellum can be encased on the one hand, on the other hand, it is possible to the resistance of the reduction air-flow for flowing to flabellum from centrifugal flabellum inner chamber.
As preferably, described sound-absorbing block circumference array has two-layer, and the space between the adjacent sound-absorbing block of outer layer sound-absorbing block circumference array is right against one piece of sound-absorbing block in internal layer sound-absorbing block circumference array；So that being absorbed by internal layer sound-absorbing block circumference array further from diffraction out sound wave between the space of outer layer sound-absorbing block circumference array.
As preferably, the flabellum of described centrifugal fan is towards meeting following requirement: this centrifugal fan is when outside air draft, and centrifugal fan is in the linear velocity at described tangential air outlet place towards air outlet；Owing in airduct, pneumatic noise is generally low frequency noise, by this preferred version, when thump is transferred to the sound-absorbing block circumference array in centrifugal fan, sound-absorbing block circumference array just and near tangential air outlet forms move toward one another, sound-absorbing block and noise is made to have huge relative velocity, thus forming Doppler effect, noise is made to be shifted to high frequency relative to sound-absorbing block by low frequency, thus significantly improving the sound-absorbing block absorption efficiency to noise.
The beneficial effects of the present invention is: this low noise lampblack fan is in use, from airduct, the noise flowed in blower housing first passes through each flabellum of centrifugal fan, and do not turn to air-flow due to sound wave, therefore regardless of the rotating speed of centrifugal fan and corner state, the noise flowed out from its each flabellum necessarily impacts on described sound-absorbing block, thus being absorbed by each sound-absorbing block；Thus reduce the noise of blower fan largely.
Accompanying drawing explanation
Fig. 1 is the structural representation of this low noise lampblack fan embodiment one.
Fig. 2 is the structural representation of this low noise lampblack fan embodiment two.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described:
Embodiment one:
In the embodiment one shown in Fig. 1, this low noise lampblack fan includes the centrifugal fan 1 that one end is closed, and the blind end axle of described centrifugal fan 1 is connected to drive motor (being in figure rear, not shown)；Described centrifugal fan 1 periphery surrounds blower housing 2；Described blower housing 2 has an air inlet through hollow shaft mouth 20 towards described centrifugal fan inner chamber and a tangential air outlet 21；Being respectively equipped with one piece of sound-absorbing block 3 being made up of sound-absorbing material between each adjacent flabellum 11 of described centrifugal fan 1, each described sound-absorbing block 3 Common arrangements becomes to be in the sound-absorbing block circumference array inside the flabellum array of centrifugal fan, and leaves space between each sound-absorbing block 3；The bore of the air inlet through hollow shaft mouth 20 of described blower housing 2, less than the inside diameter of described sound-absorbing block circumference array, makes to enter the air-flow within blower housing 2 from described air inlet through hollow shaft mouth 20 and must get to described tangential air outlet 21 after sound-absorbing block circumference array.It is pointed out that in order to avoid friction, the side of centrifugal fan 1 is inevitable leaves gap with blower housing 2, and so owing to gap is less, the overall flow direction impact for air-flow and noise is minimum, negligible.
Above-mentioned low noise lampblack fan, the inner tangent line of the flabellum 11 of described centrifugal fan 1 is along the radial direction of centrifugal fan 1, so that the noise flowed through outside centrifugal fan 1 between each adjacent flabellum flows in centrifugal fan 1 along radial direction, just to described sound-absorbing block 3, to promote noise absorption efficiency.
Additionally, the flabellum 11 of described centrifugal fan 1 is towards meeting following requirement: this centrifugal fan 1 is when outside air draft, and centrifugal fan 1 is in the linear velocity at described tangential air outlet 21 place towards air outlet, in embodiment illustrated in fig. 1 one, namely, during centrifugal fan 1 air draft, turn in Fig. 1 shown in curve arrow；Owing in airduct, pneumatic noise is generally low frequency noise, by this preferred version, when thump is transferred to the sound-absorbing block circumference array in centrifugal fan 1, sound-absorbing block circumference array just and near tangential air outlet 21 forms move toward one another, sound-absorbing block 3 and noise is made to have huge relative velocity, thus forming Doppler effect, noise is made to be shifted to high frequency relative to sound-absorbing block by low frequency, thus significantly improving the sound-absorbing block 3 absorption efficiency to noise.
Above-mentioned low noise lampblack fan is in use, from airduct, the noise flowed in blower housing 2 first passes through each flabellum 11 of centrifugal fan 1, and do not turn to air-flow due to sound wave, therefore regardless of the rotating speed of centrifugal fan 1 and corner state, the noise flowed out from its each flabellum 11 necessarily impacts on described sound-absorbing block 3, thus being absorbed by each sound-absorbing block 3；Thus reduce the noise of blower fan largely.
Embodiment two:
For the embodiment two shown in Fig. 2, itself and embodiment one are different in that: the described sound-absorbing block 3 shoe in the flabellum 11 towards centrifugal fan 1；The noise flowing to sound-absorbing block 3 between flabellum 11 can be encased on the one hand, on the other hand, it is possible to the resistance of the reduction air-flow for flowing to flabellum 11 from centrifugal fan inner chamber.Described sound-absorbing block circumference array has two-layer, and the space between the adjacent sound-absorbing block 3 of outer layer sound-absorbing block circumference array is right against one piece of sound-absorbing block in internal layer sound-absorbing block circumference array；So that being absorbed by internal layer sound-absorbing block circumference array further from diffraction out sound wave between the space of outer layer sound-absorbing block circumference array.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment of making, equivalent replace within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (5)
1. a low noise lampblack fan, including the centrifugal fan (1) that one end is closed, the blind end axle of described centrifugal fan (1) is connected to drive motor；Described centrifugal fan (1) periphery surrounds blower housing (2)；It is characterized in that: described blower housing (2) has an air inlet through hollow shaft mouth (20) towards described centrifugal fan (1) inner chamber and a tangential air outlet (21)；One piece of sound-absorbing block (3) being made up of sound-absorbing material it is respectively equipped with between each adjacent flabellum (11) of described centrifugal fan (1), each described sound-absorbing block (3) Common arrangements becomes to be in the sound-absorbing block circumference array inside the flabellum array of centrifugal fan (1), and leaves space between each sound-absorbing block (3)；The bore of the air inlet through hollow shaft mouth (20) of described blower housing (2), less than the inside diameter of described sound-absorbing block circumference array, makes to enter the internal air-flow of blower housing (2) from described air inlet through hollow shaft mouth (20) and must get to described tangential air outlet (21) after sound-absorbing block circumference array.
2. low noise lampblack fan according to claim 1, it is characterized in that: the inner tangent line of the flabellum (11) of described centrifugal fan (1) is along the radial direction of centrifugal fan (1), so that the noise flowed through between each adjacent flabellum (11) from centrifugal fan (1) outside flows in centrifugal fan (1) along radial direction, with just to described sound-absorbing block (3).
3. low noise lampblack fan according to claim 1, it is characterised in that: described sound-absorbing block (3) is in the shoe of the flabellum (11) towards centrifugal fan.
4. the low noise lampblack fan according to claim 1 or 3, it is characterised in that: described sound-absorbing block circumference array has two-layer, and the space between the adjacent sound-absorbing block of outer layer sound-absorbing block circumference array is right against one piece of sound-absorbing block in internal layer sound-absorbing block circumference array；So that being absorbed by internal layer sound-absorbing block circumference array further from diffraction out sound wave between the space of outer layer sound-absorbing block circumference array.
5. low noise lampblack fan as claimed in any of claims 1 to 3, it is characterized in that: the flabellum (11) of described centrifugal fan (1) is towards meeting following requirement: this centrifugal fan (1) is when outside air draft, and centrifugal fan (1) is in the linear velocity at described tangential air outlet (21) place towards air outlet (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610178841.0A CN105756962B (en) | 2016-03-28 | 2016-03-28 | low-noise oil smoke fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610178841.0A CN105756962B (en) | 2016-03-28 | 2016-03-28 | low-noise oil smoke fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105756962A true CN105756962A (en) | 2016-07-13 |
| CN105756962B CN105756962B (en) | 2018-09-28 |
Family
ID=56346472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610178841.0A Active CN105756962B (en) | 2016-03-28 | 2016-03-28 | low-noise oil smoke fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105756962B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108954439A (en) * | 2018-07-14 | 2018-12-07 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with spiral camber noise filtering device |
| CN108954437A (en) * | 2018-07-14 | 2018-12-07 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with multi-layer helical curved surface noise filtering device |
| CN112629001A (en) * | 2020-12-11 | 2021-04-09 | 安徽美博智能科技有限公司 | Active noise reduction device and active noise reduction system of air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3346174A (en) * | 1966-07-05 | 1967-10-10 | Trane Co | Compact axial flow fan |
| CN103216469A (en) * | 2013-04-15 | 2013-07-24 | 西安交通大学 | Photonic crystal structure low and medium frequency rectification and noise reduction device for centrifugal fan |
| CN104912821A (en) * | 2015-06-16 | 2015-09-16 | 常州协发机械制造有限公司 | Shock wave compressor |
-
2016
- 2016-03-28 CN CN201610178841.0A patent/CN105756962B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3346174A (en) * | 1966-07-05 | 1967-10-10 | Trane Co | Compact axial flow fan |
| CN103216469A (en) * | 2013-04-15 | 2013-07-24 | 西安交通大学 | Photonic crystal structure low and medium frequency rectification and noise reduction device for centrifugal fan |
| CN104912821A (en) * | 2015-06-16 | 2015-09-16 | 常州协发机械制造有限公司 | Shock wave compressor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108954439A (en) * | 2018-07-14 | 2018-12-07 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with spiral camber noise filtering device |
| CN108954437A (en) * | 2018-07-14 | 2018-12-07 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with multi-layer helical curved surface noise filtering device |
| CN112629001A (en) * | 2020-12-11 | 2021-04-09 | 安徽美博智能科技有限公司 | Active noise reduction device and active noise reduction system of air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105756962B (en) | 2018-09-28 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| TA01 | Transfer of patent application right |
Effective date of registration: 20180814 Address after: 528400 East floor of Building 2, Guangdong science and Technology Park, Tsui hang New District and 16 Ching Road, Zhongshan, China Applicant after: Guangdong Meiji Intelligent Technology Co., Ltd. Address before: 215000 Nan Yang village residents' committee, Ping Wang Town, Wujiang District, Suzhou, Jiangsu Applicant before: Qian Yuezhen |
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| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |