US3791772A - Vacuum cleaner fan assembly - Google Patents

Vacuum cleaner fan assembly Download PDF

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Publication number
US3791772A
US3791772A US00185759A US3791772DA US3791772A US 3791772 A US3791772 A US 3791772A US 00185759 A US00185759 A US 00185759A US 3791772D A US3791772D A US 3791772DA US 3791772 A US3791772 A US 3791772A
Authority
US
United States
Prior art keywords
housing
diffuser
guide blades
fan assembly
blades
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 - Lifetime
Application number
US00185759A
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English (en)
Inventor
K Keimpema
K Vonk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
Original Assignee
US Philips Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3791772A publication Critical patent/US3791772A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/164—Multi-stage fans, e.g. for vacuum cleaners
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet

Definitions

  • ABSTRACT A vacuum cleaner fan assembly consisting of a compressor and an electric motor.
  • a diffuser housing is provided, comprising a ring of guide blades constituting a radial diffuser in which ducts are provided for bypassing the air in the axial direction.
  • the guide blades are supported by sealing means between the housing and an appropriate lid.
  • the invention relates to a vacuum cleaner fan assembly consisting of a compressor and an electric motor for driving this compressor.
  • the compressor comprises an impeller which is mounted on the motor shaft and which is surrounded by a ring of guide blades constituting a radial diffuser.
  • the fan assembly be constructed such that its dimensions are as small as possible, that it consists of a minimum number of components which can be inexpensively produced in mass manufacture, and, of course, that it offers optimum performance. So far, this object has only been partly achieved. For example, until now it has appeared to be almost impossible to manufacture a fan assembly having both an acceptable cost price and efficiency, and in particular it has been impossible to provide the compressor in an acceptable manner with diffuser means which are very desirable for flow-technical reasons in view of the important efficiency increase which they may give.
  • the present invention offers a solution to this problem by providing a construction which is suitable for use in domestic vacuum cleaners, and is characterized in that the guide blades are situated in a diffuser housing in which ducts are provided for bypassing, mainly in the axial direction, the air exhausted from the guide blades.
  • the diffuser housing is preferably constructed such that the guide blades and the housing form one assembly.
  • This assembly can be made, for example, by injection moulding of a synthetic resin.
  • a further, considerably greater improvement is achieved in an embodiment which is characterized in that a lid is provided at one axial side of the housing, means being present at said side for supporting the guide blades.
  • the impeller may be designed, while maintaining the same motor power, for a larger displacement of air by increasing the height of the blades in the axial direction. This becomes manifest as the increased efficiency of the fan assembly. This increased blade height must, of course, also be applied to the diffuser blades. According to the invention this is possible without giving rise to annoying vibration phenomena.
  • the supporting means can be constructed very simply and inexpensively when, according to a further embodiment of the invention, they consist of a ring of elastic material which also serves for sealing the housing.
  • FIG. 1 is a side elevation of a single-stage vacuum cleaner fan assembly according to the invention
  • FIG. 2 is a front view of the diffuser housing used therein
  • FIG. 3 is a cross-sectional view thereof taken on the line III-III in FIG. 2, and of the lid used therewith,
  • FIG. 4 is a front view of a diffuser housing in another embodiment
  • FIG. 5 is a sectional view thereof taken on the line VV in FIG. 4,
  • FIG. 6 is a front view of a lid for the housing shown in FIGS. 4 and 5,
  • FIG. 7 is a perspective and partly sectional drawing of this diffuser housing.
  • FIG. 8 is a front and sectional view of a multi-stage vacuum cleaner fan assembly according to the invention.
  • the single-stage vacuum cleaner fan assembly shown in FIG. 1 comprises a motor which is surrounded by a housing 1 and a compressor consisting of an impeller which is rigidly connected to the motor shaft and which rotates in a diffuser housing 2.
  • This housing is closed by a lid 3 in which the inlet aperture for the air is situated.
  • the difiuser housing 2 is shown in FIGS. 2 and 3. It comprises a bottom plate 4 connected to the motor housing and provided with an aperture 5 through which the motor shaft can extend, a central space 6 in which the compressor impeller can rotate, and a mainly cylindrical outer wall 7.
  • the lid 11 shown in FIG. 3 is provided in this embodiment. This lid is provided with the central suction aperture 12.
  • a ring 13 of an elastic material is situated between the diffuser housing and the ring, said ring not only providing the closing of the ducts, but also, as was surprisingly found, serving excellently for retaining the thin ends 14 of the blades 8. Consequently, these blades can be made much thinner without the risk of breaking due to vibrations or other causes.
  • the ring 13, preferably made of a soft rubber also permits the diffuser housing 2 to be higher, thus enabling a larger height of the blades 8. As already described, this offers an important improvement of the performance of the fan assembly.
  • FIGS. 4, 5 and 7 and the associated lid shown in FIG. 6, is a simplified embodiment of the one previously described.
  • corresponding components are denoted by the same references as in FIGS. 2 and 3.
  • the same guide blade and diffuser portions A and B of the guide blades 8 can be recognized, and apertures 10 for discharging the air are provided in the bottom plate 4, the shape of which is denoted by broken lines in FIG.
  • the housing 2 is provided with a fitting rim 18 in which the lid 11 fits.
  • This lid has the shape of a flat plate which is provided with a raised portion 15 of a shape such that it fits in the spaces between the blades 8, thus being capable of closing the ducts formed by these blades.
  • gaps 16 are recessed, in which the free portions of the blades 8 fit; it is thus possible to obtain the same effect as with the ring 13 in the previous embodiment. It is advantageous if the erect walls of the raised portion 15 are slightly tapered.
  • FIG. 8 shows another embodiment in which two identical diffuserhousings 2 according to the invention are used in a two-stage compressor unit, the air being sucked in through the motor and following the path denoted by arrows.-
  • the construction of the diffuser housings 2 is fully identical to that of the previously described housings.
  • the described diffuser housings can be provided at the exhaust .side of the air with guide blades for guiding the exhaust air.
  • Such blades can be situated, for example, at the area denoted by 17 in FIG. 3.
  • a fan assembly for a vacuum cleaner comprising a fan housing, an electric motor within said housing, a compressor formed by an impeller with said housing secured to the output shaft of said motor, a unitary diffuser housing coupled with said fan housing said diffuser including a plurality of guide blades carried on said diffuser housing on one side thereof forming a radial diffuser surrounding said impeller, a plurality of axial ducts in said diffuserhousing for axially bypassing air exhausted from said guide blades out that side of said diffuser carrying said guide blades and, a lid provided on the side of the diffuser opposite said guide blades, said guide blades having free axial ends, and a support ring carried by said lid for supporting said free axial ends of said guide blades and for sealing said housing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US00185759A 1970-10-03 1971-10-01 Vacuum cleaner fan assembly Expired - Lifetime US3791772A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7014555A NL7014555A (xx) 1970-10-03 1970-10-03

Publications (1)

Publication Number Publication Date
US3791772A true US3791772A (en) 1974-02-12

Family

ID=19811220

Family Applications (1)

Application Number Title Priority Date Filing Date
US00185759A Expired - Lifetime US3791772A (en) 1970-10-03 1971-10-01 Vacuum cleaner fan assembly

Country Status (7)

Country Link
US (1) US3791772A (xx)
CA (1) CA952879A (xx)
DE (2) DE7136940U (xx)
FR (1) FR2110205B1 (xx)
GB (1) GB1360428A (xx)
NL (1) NL7014555A (xx)
SE (1) SE380429B (xx)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057370A (en) * 1975-02-04 1977-11-08 Matsushita Electric Industrial Co., Ltd Electric blower assembly
US4065233A (en) * 1974-07-16 1977-12-27 Matsushita Electric Industrial Co., Ltd. Electric blower assembly having volute passages to direct air into motor housing
US4082478A (en) * 1976-07-02 1978-04-04 Whirlpool Corporation Vacuum cleaner fan
EP0206977A2 (en) * 1985-05-17 1986-12-30 AMETEK Inc. Quiet bypass exhauster motor
US5296769A (en) * 1992-01-24 1994-03-22 Electrolux Corporation Air guide assembly for an electric motor and methods of making
WO1997019629A1 (en) * 1995-11-24 1997-06-05 Nilfisk A/S A blower for a vacuum cleaner
US5714819A (en) * 1996-10-28 1998-02-03 Ametek, Inc. Motor having universal fan end bracket
US6077032A (en) * 1998-07-16 2000-06-20 Felchar Manufacturing Corporation Housing assembly for a vacuum cleaner
US20120152504A1 (en) * 2010-12-20 2012-06-21 Hilti Aktiengesellschaft Handheld power tool with air-guiding element
US20130028710A1 (en) * 2006-05-24 2013-01-31 Resmed Motor Technologies Inc Compact low noise efficient blower for cpap devices
CN103939396A (zh) * 2013-01-22 2014-07-23 捷和电机（深圳）有限公司 一种用于离心通风设备的导风装置及电机
US9456728B2 (en) 2011-10-13 2016-10-04 Aktiebolaget Electrolux Vacuum cleaner
US20220034326A1 (en) * 2019-01-31 2022-02-03 Miro Co., Ltd. Air circulator having dual rotary vane

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951563A1 (de) * 1979-12-21 1981-07-02 Vorwerk & Co Interholding Gmbh, 5600 Wuppertal Lagerung fuer die rotorwelle von elektromotoren mit geblaeserad
GB2184224A (en) * 1985-12-11 1987-06-17 Willey Robinson Ltd Gas-fired heating appliance
US5344285A (en) * 1993-10-04 1994-09-06 Ingersoll-Dresser Pump Company Centrifugal pump with monolithic diffuser and return vane channel ring member
GB2310253A (en) * 1996-02-17 1997-08-20 Xpelair Ltd Ventilation fan

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB342065A (en) * 1929-12-05 1931-01-29 James Keith & Blackman Company Improvements in or relating to centrifugal fans
GB413887A (en) * 1933-08-30 1934-07-26 Edward Llewellyn Lewis Improvements in centrifugal pumps
US2114780A (en) * 1935-04-15 1938-04-19 Juelson Agnes Suction cleaner
US2486619A (en) * 1946-09-07 1949-11-01 Hoover Co Plastic fan for suction cleaners
DE906894C (de) * 1941-10-16 1956-08-09 Siemen & Hinsch Gmbh Leitrad fuer Kreiselpumpen
US3116696A (en) * 1960-09-20 1964-01-07 Red Jacket Mfg Co Centrifugal pump
US3158295A (en) * 1962-03-14 1964-11-24 F E Myers & Bro Co Submersible pump
US3263909A (en) * 1964-07-30 1966-08-02 Black & Decker Mfg Co High-efficiency fan assembly for vacuum cleaner
US3265001A (en) * 1964-04-24 1966-08-09 Red Jacket Mfg Company Centrifugal pump
US3288074A (en) * 1964-11-02 1966-11-29 Weber Ind Inc Submersible pump
US3477384A (en) * 1968-01-04 1969-11-11 Dempster Ind Inc Submersible multi-stage diffuser type pump

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB342065A (en) * 1929-12-05 1931-01-29 James Keith & Blackman Company Improvements in or relating to centrifugal fans
GB413887A (en) * 1933-08-30 1934-07-26 Edward Llewellyn Lewis Improvements in centrifugal pumps
US2114780A (en) * 1935-04-15 1938-04-19 Juelson Agnes Suction cleaner
DE906894C (de) * 1941-10-16 1956-08-09 Siemen & Hinsch Gmbh Leitrad fuer Kreiselpumpen
US2486619A (en) * 1946-09-07 1949-11-01 Hoover Co Plastic fan for suction cleaners
US3116696A (en) * 1960-09-20 1964-01-07 Red Jacket Mfg Co Centrifugal pump
US3158295A (en) * 1962-03-14 1964-11-24 F E Myers & Bro Co Submersible pump
US3265001A (en) * 1964-04-24 1966-08-09 Red Jacket Mfg Company Centrifugal pump
US3263909A (en) * 1964-07-30 1966-08-02 Black & Decker Mfg Co High-efficiency fan assembly for vacuum cleaner
US3288074A (en) * 1964-11-02 1966-11-29 Weber Ind Inc Submersible pump
US3477384A (en) * 1968-01-04 1969-11-11 Dempster Ind Inc Submersible multi-stage diffuser type pump

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065233A (en) * 1974-07-16 1977-12-27 Matsushita Electric Industrial Co., Ltd. Electric blower assembly having volute passages to direct air into motor housing
US4057370A (en) * 1975-02-04 1977-11-08 Matsushita Electric Industrial Co., Ltd Electric blower assembly
US4082478A (en) * 1976-07-02 1978-04-04 Whirlpool Corporation Vacuum cleaner fan
EP0206977A2 (en) * 1985-05-17 1986-12-30 AMETEK Inc. Quiet bypass exhauster motor
US4669952A (en) * 1985-05-17 1987-06-02 Ametek, Inc. Quiet by-pass vacuum motor
EP0206977A3 (en) * 1985-05-17 1987-08-26 Ametek Inc. Quiet bypass exhauster motor
AU587252B2 (en) * 1985-05-17 1989-08-10 Ametek, Inc. Quiet by-pass vacuum motor
US5296769A (en) * 1992-01-24 1994-03-22 Electrolux Corporation Air guide assembly for an electric motor and methods of making
WO1997019629A1 (en) * 1995-11-24 1997-06-05 Nilfisk A/S A blower for a vacuum cleaner
US5714819A (en) * 1996-10-28 1998-02-03 Ametek, Inc. Motor having universal fan end bracket
US6077032A (en) * 1998-07-16 2000-06-20 Felchar Manufacturing Corporation Housing assembly for a vacuum cleaner
US20130028710A1 (en) * 2006-05-24 2013-01-31 Resmed Motor Technologies Inc Compact low noise efficient blower for cpap devices
US8734097B2 (en) * 2006-05-24 2014-05-27 Resmed Motor Technologies Inc Compact low noise efficient blower for CPAP devices
US9677563B2 (en) 2006-05-24 2017-06-13 Resmed Motor Technologies Inc. Compact low noise efficient blower for CPAP devices
US10605246B2 (en) 2006-05-24 2020-03-31 Resmed Motor Technologies Inc. Compact low noise efficient blower for CPAP devices
US11353030B2 (en) 2006-05-24 2022-06-07 Resmed Motor Technologies Inc. Compact low noise efficient blower for CPAP devices
US11892000B2 (en) 2006-05-24 2024-02-06 Resmed Motor Technologies Inc. Compact low noise efficient blower for CPAP devices
US20120152504A1 (en) * 2010-12-20 2012-06-21 Hilti Aktiengesellschaft Handheld power tool with air-guiding element
US9456728B2 (en) 2011-10-13 2016-10-04 Aktiebolaget Electrolux Vacuum cleaner
CN103939396A (zh) * 2013-01-22 2014-07-23 捷和电机（深圳）有限公司 一种用于离心通风设备的导风装置及电机
US20220034326A1 (en) * 2019-01-31 2022-02-03 Miro Co., Ltd. Air circulator having dual rotary vane

Also Published As

Publication number Publication date
FR2110205A1 (xx) 1972-06-02
SE380429B (sv) 1975-11-10
GB1360428A (en) 1974-07-17
NL7014555A (xx) 1972-04-05
CA952879A (en) 1974-08-13
DE7136940U (de) 1976-05-13
DE2148574A1 (de) 1972-04-06
FR2110205B1 (xx) 1975-07-18

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