EP1273256A2 - Staubsauger - Google Patents
Staubsauger Download PDFInfo
- Publication number
- EP1273256A2 EP1273256A2 EP02254643A EP02254643A EP1273256A2 EP 1273256 A2 EP1273256 A2 EP 1273256A2 EP 02254643 A EP02254643 A EP 02254643A EP 02254643 A EP02254643 A EP 02254643A EP 1273256 A2 EP1273256 A2 EP 1273256A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- impeller
- vacuum cleaner
- duct
- airflow path
- inlet
- 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
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
Definitions
- This invention relates to a vacuum cleaner having an increased suction power.
- vacuum cleaners incorporate a clean air fan system in which air is drawn through a separation unit comprising a filter bag and/or a cyclonic separator by a fan mounted downstream thereof.
- the separation unit removes substantially all of the dust entrained in the airflow and thus the air passing through the fan is substantially clean.
- the fan comprises a centrifugal radial flow impeller driven by an electric motor.
- the fan is arranged to draw air axially, out of a first chamber mounted in front of the impeller. The air is then driven radially by the impeller into a second chamber which is connected to the exhaust of the cleaner.
- a duct leads from the separation unit to the first chamber.
- Vacuum cleaners of the above mentioned type function extremely well. However, there is increasing demand to improve the suction power of vacuum cleaners without increasing the wattage of the motor.
- a vacuum cleaner having an inlet for dirty air, an outlet for cleaned air, an airflow path extending between the inlet and outlet, a fan unit mounted in the airflow path for causing an airflow between the inlet and outlet through a dust separation unit arranged to separate a substantial amount of the dust and other matter from the air flowing along said airflow path, the fan unit comprising a radial flow impeller and a motor for rotating the impeller about a rotational axis, the impeller comprising a plurality of blades extending radially from an axially extending central hollow region having an air inlet at one axial end thereof, the airflow path comprising a duct having an outlet end directly aligned with the inlet of the impeller, said duct having a substantially uniform cross-sectional area along a substantial part of its length.
- the fan chamber actually forms a part of the duct leading to the impeller.
- the increased cross-sectional area of the chamber causes the airflow entering the chamber to expand and to drop in velocity. This expansion and drop in velocity causes the kinetic energy of the air molecules to drop as they enter the fan chamber. Accordingly, more power is required to move the air from the chamber.
- the chamber also causes a turbulent flow which further inhibits the airflow and causes noise.
- the present invention overcomes the above-mentioned problems by omitting the chamber and by communicating the air directly to the impeller through a duct having a substantially uniform cross-sectional area along a substantial part of its length.
- the area of said outlet end of the duct of the airflow path is substantially equal to the cross-sectional area of the inlet end of the central duct of the impeller.
- outlet end of the duct of the airflow path extends axially of the rotational axis of the impeller.
- outlet end of the duct of the airflow path is circular in cross-section.
- Conventional vacuum cleaners having a fan chamber can be modified in accordance with the present invention by providing an insert member in the chamber having a passageway therethrough forming a part of the duct of the airflow path.
- the member comprises a solid body of material which fills the chamber apart from the passageway.
- the material comprises expanded polystyrene or polypropylene.
- the separation unit is preferably mounted in the airflow path upstream of the fan unit, the duct having an inlet end connected to the outlet of the separation unit.
- the fan assembly of an upright vacuum cleaner which assembly is arranged to draw air along an inlet duct 10 leading from a dust separation unit, such as a cyclonic separator and/or filter bag (not shown).
- a dust separation unit such as a cyclonic separator and/or filter bag (not shown).
- the output shaft 14 of the motor 13 is connected to an impeller 15 comprising a plurality of blades 16 extending radially with respect to the rotational axis of the motor shaft 14, between circular front and rear plates 18,28 of the impeller which lie normal to the rotational axis.
- the radially outer ends of the blades 16 terminate adjacent the inner surface of the cylindrical housing 11.
- the blades 16 extend outwardly from a central hollow region 17 which extends axially of the impeller 15.
- a circular aperture 29 is formed in the front plate of the impeller 15 to communicate with the central hollow region 17.
- a large cavity 19 is formed at one end of the housing 11 between the front plate 18 of the impeller 15 and an end wall of the housing 11.
- the inlet duct 10 from the separation unit leads tangentially into the cavity 19.
- the fan unit as hereinbefore described corresponds with that of a conventional vacuum cleaner.
- the impeller 15 is rotated about its axis to cause air to flow radially outwardly from its central region 17 through the blades 16 and then axially over the motor 13, whereupon the air leaves the housing 11 through an exhaust duct 21.
- the impeller 15 draws air axially into the central region 17 through the aperture 29 from the cavity 19, disposed on the opposite side of the impeller 15 to the motor 13: This creates a drop in pressure in the cavity 19 which causes air to flow from the atmosphere through the dust separation unit (not shown) and into the cavity 19, whereupon it is discharged to atmosphere through the impeller 15 and exhaust 21 as hereinbefore described.
- the cavity 19 is filled by a cylindrical insert 20 of expanded polypropylene material.
- An involuted through passage 22 extends through the insert 20, with one end of the passage 22 extending axially to communicate directly with the tangential inlet duct 10 from the outlet of the separation unit and the other end extending axially to communicate directly with the aperture 29 in the front plate 18 of the impeller 15: preferably this end of the passage 22 is circular in cross-section and has a diameter which is substantially equal to the diameter of the aperture 29 in the front plate 18 of the impeller 15.
- the insert 20 effectively fills the cavity 19, so as to maintain a substantially uniform cross-sectional area to the airflow path leading from the dust separation unit. We have found that this surprisingly increases the suction power.
- the present invention solves the above-mentioned problem by effectively replacing the chamber 19 with a passageway 22 having a cross-sectional area which is substantially equal to the cross-sectional area of the duct 10 and the area of the aperture 29 in the front plate 18 of the impeller 15.
- the duct 10 could lead directly to the impeller 15 or to a passageway of similar cross-sectional area that leads directly to the impeller 15.
Landscapes
- Filters For Electric Vacuum Cleaners (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0116539A GB2377163B (en) | 2001-07-05 | 2001-07-05 | Vacuum cleaner |
GB0116539 | 2001-07-05 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1273256A2 true EP1273256A2 (de) | 2003-01-08 |
EP1273256A3 EP1273256A3 (de) | 2004-01-14 |
EP1273256B1 EP1273256B1 (de) | 2010-01-06 |
Family
ID=9918037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02254643A Expired - Lifetime EP1273256B1 (de) | 2001-07-05 | 2002-07-02 | Staubsauger |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1273256B1 (de) |
AT (1) | ATE454077T1 (de) |
DE (1) | DE60234981D1 (de) |
ES (1) | ES2338763T3 (de) |
GB (1) | GB2377163B (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2873563A1 (fr) * | 2004-07-29 | 2006-02-03 | Seb Sa | Aspirateur |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB341743A (en) * | 1929-03-09 | 1931-01-22 | Paul Pfeiffer | Improvements in electrically driven vacuum cleaners |
DE19616156C1 (de) * | 1996-04-23 | 1997-10-02 | Fakir Werk Gmbh & Co | Staubsauger |
EP0970651A2 (de) * | 1998-07-06 | 2000-01-12 | Matsushita Electric Industrial Co., Ltd. | Staubsauger |
GB2343837A (en) * | 1998-11-18 | 2000-05-24 | White Consolidated Ind Inc | Vacuum cleaner with obliquely mounted fan; battery powered |
DE10056933A1 (de) * | 2000-06-30 | 2002-01-24 | Samsung Kwangju Electronics Co | Rückstrom-Staubsauger |
-
2001
- 2001-07-05 GB GB0116539A patent/GB2377163B/en not_active Expired - Fee Related
-
2002
- 2002-07-02 EP EP02254643A patent/EP1273256B1/de not_active Expired - Lifetime
- 2002-07-02 AT AT02254643T patent/ATE454077T1/de not_active IP Right Cessation
- 2002-07-02 DE DE60234981T patent/DE60234981D1/de not_active Expired - Lifetime
- 2002-07-02 ES ES02254643T patent/ES2338763T3/es not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB341743A (en) * | 1929-03-09 | 1931-01-22 | Paul Pfeiffer | Improvements in electrically driven vacuum cleaners |
DE19616156C1 (de) * | 1996-04-23 | 1997-10-02 | Fakir Werk Gmbh & Co | Staubsauger |
EP0970651A2 (de) * | 1998-07-06 | 2000-01-12 | Matsushita Electric Industrial Co., Ltd. | Staubsauger |
GB2343837A (en) * | 1998-11-18 | 2000-05-24 | White Consolidated Ind Inc | Vacuum cleaner with obliquely mounted fan; battery powered |
DE10056933A1 (de) * | 2000-06-30 | 2002-01-24 | Samsung Kwangju Electronics Co | Rückstrom-Staubsauger |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2873563A1 (fr) * | 2004-07-29 | 2006-02-03 | Seb Sa | Aspirateur |
WO2006024713A1 (fr) * | 2004-07-29 | 2006-03-09 | Seb S.A. | Aspirateur avec des elements constitutifs en polypropylene expanse |
CN100589744C (zh) * | 2004-07-29 | 2010-02-17 | Seb公司 | 具有由膨胀性聚丙烯制成的构成元件的吸尘器 |
Also Published As
Publication number | Publication date |
---|---|
EP1273256B1 (de) | 2010-01-06 |
EP1273256A3 (de) | 2004-01-14 |
GB0116539D0 (en) | 2001-08-29 |
GB2377163B (en) | 2004-12-15 |
ATE454077T1 (de) | 2010-01-15 |
DE60234981D1 (de) | 2010-02-25 |
ES2338763T3 (es) | 2010-05-12 |
GB2377163A (en) | 2003-01-08 |
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