EP0342484A3 - Very noiseless motor driven centrifugal fan - Google Patents
Very noiseless motor driven centrifugal fan Download PDFInfo
- Publication number
- EP0342484A3 EP0342484A3 EP19890108330 EP89108330A EP0342484A3 EP 0342484 A3 EP0342484 A3 EP 0342484A3 EP 19890108330 EP19890108330 EP 19890108330 EP 89108330 A EP89108330 A EP 89108330A EP 0342484 A3 EP0342484 A3 EP 0342484A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- motor driven
- centrifugal fan
- driven centrifugal
- volute
- noiseless motor
- 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.)
- Withdrawn
Links
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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The motor driven centrifugal fan (10)
according to the present invention
has the inner surface (18) of the volute (12) and possibly also the inner
surfaces of the sidewalls (13) laterally defining the volute which are
roughened.
The roughness can comprise projections or recesses of irregular
shape, for example of orange-peel type, or of regular shape, for exam
ple regular polygons or circles which can be arranged along parallel
lines which are or not offset from each other.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT20595/88A IT1217607B (en) | 1988-05-16 | 1988-05-16 | CENTRIFUGAL MOTOR FAN PARTICULARLY SILENT |
IT2059588 | 1988-05-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0342484A2 EP0342484A2 (en) | 1989-11-23 |
EP0342484A3 true EP0342484A3 (en) | 1990-10-03 |
Family
ID=11169315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890108330 Withdrawn EP0342484A3 (en) | 1988-05-16 | 1989-05-09 | Very noiseless motor driven centrifugal fan |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0342484A3 (en) |
IT (1) | IT1217607B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITVI20020145A1 (en) * | 2002-07-02 | 2004-01-02 | Comefri Spa | ANTI-NOISE AND ANTI-VORTE DIVIDER |
DE102008027845A1 (en) * | 2008-06-11 | 2009-12-17 | Behr Gmbh & Co. Kg | Motor vehicle air conditioning system has pipe or channel for guiding fluid, and wall, which comprises flow area, where upper surface of wall restricts flow area |
DE102013222207B4 (en) * | 2013-10-31 | 2022-03-03 | Mahle International Gmbh | centrifugal fan |
CN104675752B (en) * | 2015-03-16 | 2017-04-12 | 中国机械工业集团有限公司 | Centrifugal fan volute employing granular damping vibration attenuation |
CN105065332B (en) * | 2015-09-11 | 2018-11-30 | 珠海格力电器股份有限公司 | Air conditioner, drum-shaped volute air duct system and air duct volute thereof |
CN105115060A (en) * | 2015-09-29 | 2015-12-02 | 北京卫家环境技术有限公司 | Air purifier |
CN107940585A (en) * | 2017-12-26 | 2018-04-20 | 海信(广东)空调有限公司 | Air duct bottom plate structure, air duct device and air conditioner indoor unit |
CN111089070A (en) * | 2019-08-14 | 2020-05-01 | 锐奇控股股份有限公司 | High wind speed air blower |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE600692C (en) * | ||||
DE2203450A1 (en) * | 1972-01-26 | 1973-08-02 | Christ & Co O | FACILITY ON FAN AIR DUCTS |
FR2347539A1 (en) * | 1976-04-05 | 1977-11-04 | Rolls Royce | ACOUSTIC COATING FOR TURBOREACTOR DUCTED BLOWER DUCT |
FR2596108A1 (en) * | 1986-03-22 | 1987-09-25 | Usui Kokusai Sangyo Kk | BLADES FOR FAN PROPELLER |
-
1988
- 1988-05-16 IT IT20595/88A patent/IT1217607B/en active
-
1989
- 1989-05-09 EP EP19890108330 patent/EP0342484A3/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE600692C (en) * | ||||
DE2203450A1 (en) * | 1972-01-26 | 1973-08-02 | Christ & Co O | FACILITY ON FAN AIR DUCTS |
FR2347539A1 (en) * | 1976-04-05 | 1977-11-04 | Rolls Royce | ACOUSTIC COATING FOR TURBOREACTOR DUCTED BLOWER DUCT |
FR2596108A1 (en) * | 1986-03-22 | 1987-09-25 | Usui Kokusai Sangyo Kk | BLADES FOR FAN PROPELLER |
Also Published As
Publication number | Publication date |
---|---|
IT1217607B (en) | 1990-03-30 |
IT8820595A0 (en) | 1988-05-16 |
EP0342484A2 (en) | 1989-11-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): BE DE ES FR |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
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AK | Designated contracting states |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19910404 |