EP1039142A2 - Diffuseur pour soufflante - Google Patents
Diffuseur pour soufflante Download PDFInfo
- Publication number
- EP1039142A2 EP1039142A2 EP00660054A EP00660054A EP1039142A2 EP 1039142 A2 EP1039142 A2 EP 1039142A2 EP 00660054 A EP00660054 A EP 00660054A EP 00660054 A EP00660054 A EP 00660054A EP 1039142 A2 EP1039142 A2 EP 1039142A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- diffuser
- fan wheel
- arrangement
- blades
- fan
- 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
Links
Images
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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—Bladed diffusers
Definitions
- the invention relates to an arrangement in connection with a fan comprising a rotatable fan wheel and a diffuser arranged in connection with the fan wheel to convert kinetic energy generated by a high velocity of exhaust into static pressure.
- a diffuser arranged after a fan wheel in the direction of flow is to convert the dynamic pressure generated by a high velocity of exhaust of the fan wheel into static pressure. This can be achieved by lowering the high velocity of exhaust after the fan wheel by the diffuser.
- An object of the invention is to provide an arrangement to enable drawbacks of the prior art to be eliminated. This is achieved by an arrangement of the invention.
- the arrangement of the invention is characterized in that at least one of the side plates of the diffuser is arranged to overlap with the outer edge of the rim of the fan wheel.
- An advantage of the arrangement of the invention is mainly that it enables all the above-mentioned drawbacks to be substantially efficiently affected and a preferable result to be achieved.
- a further advantage of the invention is its simplicity, which means that the invention is inexpensive to manufacture and use.
- a still further advantage of the invention is its flexibility in use, whereby an arrangement of the invention can be preferably applied to different fans.
- Figure 1 schematically shows how a flow of a gaseous medium, such as air, behaves in a fan apparatus of the prior art.
- reference number 1 refers to a fan wheel and reference number 2 to a diffuser by which, as stated above, kinetic energy generated by a high velocity of exhaust is converted into static pressure.
- the fan wheel is rotated by an appropriate motor, such as an electric motor.
- the motor is not shown in the figure.
- the flow of air is indicated in Figure 1 by means of arrows, whereby the above-mentioned disturbing reflow is also clearly apparent.
- the solution of Figure 1 suffers from the disadvantages relating to the noise level, as stated above.
- Figure 2 schematically shows an arrangement of the invention.
- the same reference numbers have the same significance as in Figure 1.
- the direction of rotation of the fan wheel 1 has been indicated by arrow N.
- high and low flow rates of air which are used to describe the basis of operation of the diffuser, in other words the above-mentioned conversion of kinetic energy into static pressure, have also been denoted in Figure 2 by arrows NK and NM.
- Figure 2 further clearly shows blades 3 of the fan wheel and blades 4 located in a diffuser of the present embodiment, the blades 4 of the diffuser being arranged between two side plates 2a, 2b located at a distance from each other, as can be seen from Figures 3 to 5.
- At least one of the side plates 2a, 2b of the diffuser is arranged to overlap with the outer edge of the rim of the fan wheel 1.
- the above-mentioned essential feature of the invention is clearly apparent in Figure 2 wherein the outer rim of the fan wheel 1 is indicated in a dotted line and the edge of the side plate of the diffuser is indicated in a continuous line. This can also be clearly seen in Figure 3 to 5.
- the above-mentioned essential feature of the invention also becomes apparent in Figures 6 and 7. In Figures 3 to 5 and 6 and 7, the flow of air is schematically indicated by means of arrows.
- the above-described structure enables the harmful reflow mentioned earlier to be avoided and the problems related to the noise level to be mitigated.
- both side plates of the diffuser 2 are arranged to overlap with the outer edge of the rim of the fan wheel, as shown in Figures 3 to 6, for example.
- the invention can, however, also be applied such that only one of the sides of the diffuser overlaps with the rim of the fan wheel.
- Such an application is schematically shown in Figure 7 wherein only the side plate 2b of the diffuser is arranged to overlap with the outer edge of the rim of the fan wheel.
- the structure of Figure 7 yields a slightly poorer result than, for example, the arrangement of Figure 6, but the solution of Figure 7 is advantageous to installability since the diffuser can be a simple, uniform structure which can be installed in place from the side.
- the overlapping side plate can be either one of the side plates 2a, 2b in this application.
- the structure of the diffuser must be a structure which can be opened, for example.
- FIG 2 shows the blades 4 located in the diffuser that are constructed from straight parts.
- the straightness of the blades 4 is apparent in Figure 2.
- the straight blades 4 are an advantage in the manufacturing process.
- the blades 4 of the diffuser can be shaped in many different ways, as shown in Figures 3 to 5. In the application of Figure 3, sides 4a of the blades 4 of the diffuser facing the fan wheel are straight. In the applications of Figures 4 and 5, the sides of the blades 4 facing the fan wheel are bevelled.
- the sides 4a are sloped seen in the direction of incoming air such that the edge of the diffuser facing the front side plate 2a is located at a greater distance from the fan wheel 1 than the edge facing the side plate 2b located further back.
- the term "seen in the direction of incoming air” refers to the direction of the rotation axis of the fan wheel 1 seen from the side of the fan wherefrom air flows to the fan wheel. This direction is marked with arrows TS in Figures 3 to 5. The flow of air is indicated by arrows.
- the blades 4 are bevelled in an inverted manner compared with the application of Figure 5. The most preferable result is achieved with the application of Figure 5.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Chemical Treatment Of Metals (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Elimination Of Static Electricity (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI990637A FI105946B (fi) | 1999-03-22 | 1999-03-22 | Sovitelma puhaltimen yhteydessä |
FI990637 | 1999-03-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1039142A2 true EP1039142A2 (fr) | 2000-09-27 |
EP1039142A3 EP1039142A3 (fr) | 2002-05-08 |
EP1039142B1 EP1039142B1 (fr) | 2004-09-22 |
Family
ID=8554255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00660054A Expired - Lifetime EP1039142B1 (fr) | 1999-03-22 | 2000-03-21 | Diffuseur pour soufflante |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1039142B1 (fr) |
AT (1) | ATE277287T1 (fr) |
DE (1) | DE60013940T2 (fr) |
FI (1) | FI105946B (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1455094A1 (fr) * | 2003-03-04 | 2004-09-08 | Ziehl-Abegg AG | Roue ventilateur radial |
RU183324U1 (ru) * | 2017-12-29 | 2018-09-18 | федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский политехнический университет Петра Великого" (ФГАОУ ВО "СПбПУ") | Безлопаточный диффузор малорасходной центробежной компрессорной ступени |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2471174A (en) * | 1947-04-24 | 1949-05-24 | Clark Bros Co Inc | Centrifugal compressor stability means |
US2665841A (en) * | 1951-05-04 | 1954-01-12 | Allen Mcmeen J | Air circulator |
US3627440A (en) * | 1970-04-07 | 1971-12-14 | Westinghouse Electric Corp | Centrifugal fan |
JPS5853700A (ja) * | 1981-09-25 | 1983-03-30 | Mitsubishi Heavy Ind Ltd | 遠心形回転機械のディフューザ |
WO1998045601A1 (fr) * | 1997-04-04 | 1998-10-15 | Bosch Automotive Systems Corporation | Ventilateur centrifuge a aubes de regulation de debit |
US5841943A (en) * | 1997-04-25 | 1998-11-24 | Soundesign, Llc | Ducted flow hair dryer with multiple impellers |
-
1999
- 1999-03-22 FI FI990637A patent/FI105946B/fi not_active IP Right Cessation
-
2000
- 2000-03-21 DE DE60013940T patent/DE60013940T2/de not_active Expired - Lifetime
- 2000-03-21 EP EP00660054A patent/EP1039142B1/fr not_active Expired - Lifetime
- 2000-03-21 AT AT00660054T patent/ATE277287T1/de not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2471174A (en) * | 1947-04-24 | 1949-05-24 | Clark Bros Co Inc | Centrifugal compressor stability means |
US2665841A (en) * | 1951-05-04 | 1954-01-12 | Allen Mcmeen J | Air circulator |
US3627440A (en) * | 1970-04-07 | 1971-12-14 | Westinghouse Electric Corp | Centrifugal fan |
JPS5853700A (ja) * | 1981-09-25 | 1983-03-30 | Mitsubishi Heavy Ind Ltd | 遠心形回転機械のディフューザ |
WO1998045601A1 (fr) * | 1997-04-04 | 1998-10-15 | Bosch Automotive Systems Corporation | Ventilateur centrifuge a aubes de regulation de debit |
US5841943A (en) * | 1997-04-25 | 1998-11-24 | Soundesign, Llc | Ducted flow hair dryer with multiple impellers |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 007, no. 141 (M-223), 21 June 1983 (1983-06-21) & JP 58 053700 A (MITSUBISHI JUKOGYO KK), 30 March 1983 (1983-03-30) * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1455094A1 (fr) * | 2003-03-04 | 2004-09-08 | Ziehl-Abegg AG | Roue ventilateur radial |
WO2004079201A1 (fr) * | 2003-03-04 | 2004-09-16 | Ziehl-Abegg Ag | Roue de soufflante radiale, unite de soufflante, et dispositif de soufflante radiale |
CN100458178C (zh) * | 2003-03-04 | 2009-02-04 | 施乐百有限公司 | 离心式风机轮、风机单元和离心式风机装置 |
US9157452B2 (en) | 2003-03-04 | 2015-10-13 | Ziehl-Abegg Se | Radial fan wheel, fan unit and radial fan arrangement |
RU183324U1 (ru) * | 2017-12-29 | 2018-09-18 | федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский политехнический университет Петра Великого" (ФГАОУ ВО "СПбПУ") | Безлопаточный диффузор малорасходной центробежной компрессорной ступени |
Also Published As
Publication number | Publication date |
---|---|
EP1039142B1 (fr) | 2004-09-22 |
FI990637A0 (fi) | 1999-03-22 |
ATE277287T1 (de) | 2004-10-15 |
FI105946B (fi) | 2000-10-31 |
EP1039142A3 (fr) | 2002-05-08 |
DE60013940D1 (de) | 2004-10-28 |
DE60013940T2 (de) | 2005-10-06 |
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