CN201292995Y - Low noise blower - Google Patents
Low noise blower Download PDFInfo
- Publication number
- CN201292995Y CN201292995Y CNU2008201860058U CN200820186005U CN201292995Y CN 201292995 Y CN201292995 Y CN 201292995Y CN U2008201860058 U CNU2008201860058 U CN U2008201860058U CN 200820186005 U CN200820186005 U CN 200820186005U CN 201292995 Y CN201292995 Y CN 201292995Y
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- China
- Prior art keywords
- noise
- air
- casing
- low
- air channel
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a low-noise exhaust fan used in an oil smoke exhausting system, a ventilation system, and the like. The low-noise exhaust fan comprises a shell provided with an air inlet and an air outlet; a blower is arranged in the shell; a muffler device is arranged in the shell between the air inlet and the air outlet of the blower; the muffler device is formed by at least one muffling unit which is formed in such a way that a plurality of juxtaposedly arranged air flues are serially connected end to end; the inlet of a first-level air flue faces to the air inlet of the shell; and the outlet of the last-level air flue faces to the blower. The low-noise exhaust fan has low noise in use, and has simple and compact structure as well as low manufacture cost.
Description
Technical field
The utility model relates to a kind of low noise air bells exhauster that is used for systems such as cooking-fume discharging, ventilation.
Background technique
Existing exhaust system generally comprises the blower fan that is installed in the ventilation duct, and the noise that blower fan produces in the course of the work can be along the ventilation duct transmission, thereby brings noise pollution to the user.
Summary of the invention
Problem to be solved in the utility model provides a kind of low noise, simple structure, low noise air bells exhauster cheaply.
Low noise air bells exhauster of the present utility model comprises a casing with intake grill and exhaust outlet, blower fan is installed in the casing, be provided with a silencer in the casing between blower fan and intake grill, described silencer is made of at least one noise elimination unit, described noise elimination unit is communicated from beginning to end to connect by a plurality of air channels that are arranged side by side and constitutes, the import in first order air channel is towards the intake grill of casing, and the outlet in afterbody air channel is towards blower fan.
The air channel of forming the noise elimination unit has three at least, and air channel quantity is odd number, thus guarantee series connection back, air channel inlet/outlet towards on the contrary.
Described noise elimination unit has a plurality of, and many noise eliminations unit is distributed on the whole ventilation section of casing side by side.
Noise is low when in use for low noise air bells exhauster of the present utility model, and simple in structure, compact, low cost of manufacture.In its working procedure, can form pressure difference between blower fan fan page or leaf suction port and the silencer outlet on the one hand, indoor gas is entered from the silencer import, and pass through with the reciprocal path that higher flow velocity forms along the air channel in the noise elimination unit, on the other hand the noise that produces of blower fan by the gas molecule vibration in the process of indoor transmission energy, by the path, air channel in the noise elimination unit time, moving direction when the molecular vibrations direction that the noise energy that receives owing to each gas molecule in every group of air channel forms is passed through the path, air channel with this molecule is opposite substantially all the time, consequently making gas molecule transmit the noise energy ability obtains weakening, and between the air channel of noise elimination unit, the noise vibration energy each air channel connection passage port side direction transmission capacity a little less than, thereby noise energy continue to weaken obtaining in indoor transmittance process, thereby realizes the noise reduction purpose.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the cross-sectional view of silencer.
Fig. 3 is the plan structure schematic representation of Fig. 2.
Embodiment
The noise air bells exhauster comprises a casing 1 as shown in Figure 1, and the upper end of casing 1 is an exhaust outlet, and the lower end is uncovered to be intake grill, on casing 1 inner chamber top blower fan 2 is installed, and silencer 3 is installed in the chassis cavity of the below of blower fan 2.
As shown in Figures 2 and 3, silencer 3 is made up of a plurality of noise eliminations unit 4 that is arranged side by side, and each noise elimination unit 4 is to be communicated by three air channels that are arranged side by side 41 head and the tail to be in series, the import 42 in first order air channel down, the outlet 43 in afterbody air channel is up.
In the course of the work, the gas that need discharge is the uncovered casing that enters from the lower end of casing 1, import 42 from each noise elimination unit 4 enters multistage air channel 41 again, and pass out to blower fan 2 from the outlet 43 of noise elimination unit, discharged from exhaust outlet by blower fan 2, and decay gradually in the transmittance process in the other direction in the air channel of noise in the noise elimination unit.
Claims (3)
1, a kind of low noise air bells exhauster, comprise a casing (1) with intake grill and exhaust outlet, blower fan (2) is installed in the casing, it is characterized in that: be provided with a silencer (3) in the casing between blower fan and intake grill, described silencer is made of at least one unit of eliminating the noise (4), described noise elimination unit is communicated to connect by a plurality of air channels (41) head and the tail that are arranged side by side and constitutes, and the import in first order air channel is towards the intake grill of casing, and the outlet in afterbody air channel is towards blower fan.
2, low noise air bells exhauster according to claim 1 is characterized in that: the air channel (41) of forming noise elimination unit (4) has three at least, and air channel quantity is odd number.
3, low noise air bells exhauster according to claim 1 and 2 is characterized in that: described noise elimination unit (4) has a plurality of, and many noise eliminations unit is distributed on the whole ventilation section of casing side by side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201860058U CN201292995Y (en) | 2008-10-10 | 2008-10-10 | Low noise blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201860058U CN201292995Y (en) | 2008-10-10 | 2008-10-10 | Low noise blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201292995Y true CN201292995Y (en) | 2009-08-19 |
Family
ID=41006472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201860058U Expired - Fee Related CN201292995Y (en) | 2008-10-10 | 2008-10-10 | Low noise blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201292995Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617538A (en) * | 2018-10-29 | 2019-12-27 | 黄夏兰 | Noise reduction mechanism of integrated stove |
| CN110617539A (en) * | 2018-10-29 | 2019-12-27 | 黄夏兰 | Adjustable resonance barrel for integrated stove |
| CN112177982A (en) * | 2019-07-01 | 2021-01-05 | 青岛经济技术开发区海尔热水器有限公司 | Noise reduction air duct and gas water heater |
-
2008
- 2008-10-10 CN CNU2008201860058U patent/CN201292995Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617538A (en) * | 2018-10-29 | 2019-12-27 | 黄夏兰 | Noise reduction mechanism of integrated stove |
| CN110617539A (en) * | 2018-10-29 | 2019-12-27 | 黄夏兰 | Adjustable resonance barrel for integrated stove |
| CN112177982A (en) * | 2019-07-01 | 2021-01-05 | 青岛经济技术开发区海尔热水器有限公司 | Noise reduction air duct and gas water heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20101010 |