EP1842473A2 - Elektromotorgehäuse für eine Staubsaugergebläseeinheit - Google Patents

Elektromotorgehäuse für eine Staubsaugergebläseeinheit Download PDF

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Publication number
EP1842473A2
EP1842473A2 EP07250885A EP07250885A EP1842473A2 EP 1842473 A2 EP1842473 A2 EP 1842473A2 EP 07250885 A EP07250885 A EP 07250885A EP 07250885 A EP07250885 A EP 07250885A EP 1842473 A2 EP1842473 A2 EP 1842473A2
Authority
EP
European Patent Office
Prior art keywords
air
flow
housing
fan
electric 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Withdrawn
Application number
EP07250885A
Other languages
English (en)
French (fr)
Other versions
EP1842473A3 (de
Inventor
Gavin Burnham
Bengt Ivar Anders Ivarsson
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.)
Vax Ltd
Original Assignee
Vax Ltd
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 Vax Ltd filed Critical Vax Ltd
Publication of EP1842473A2 publication Critical patent/EP1842473A2/de
Publication of EP1842473A3 publication Critical patent/EP1842473A3/de
Withdrawn legal-status Critical Current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
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
    • 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
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/22—Mountings for motor fan assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

Definitions

  • This invention relates to a housing for an electric motor, intended for use for driving a fan in a vacuum cleaner, although it may have applications in other appliances or devices.
  • vacuum cleaners In order to create the volume of air flow necessary for effective cleaning, vacuum cleaners use fans or impellers driven by relatively powerful electric motors.
  • vacuum cleaners for domestic use may include motors whose power is in the range 1kw to 2kw.
  • effective cooling is necessary for and this is generally achieved, at least in vacuum cleaners for "dry" use, by providing for the flow of air to pass at least around, and in most cases through the interior of, the motor.
  • the flow of cleaning air having entered the vacuum cleaner directly from a cleaning head (in the case of an "upright” type of cleaner) or by way of a suction hose (in the case of a "cylinder” type of cleaner or an upright cleaner having a hose) passes firstly to a dust separating/collecting device of the cleaner, which by use of one or more cyclonic separating devices and/or filters separates entrained dust and dirt from the air flow and retains it for later disposal.
  • the air is drawn to the fan (usually through a pre-motor filter, which ensures that air passing through the motor is as clean as possible), and thence through the motor and is expelled to the external atmosphere from the cleaner.
  • vacuum cleaner design minimising the level of noise created in the vicinity of a cleaner while it is in operation. Since in the path of flow of air in a vacuum cleaner the motor is usually immediately before the air is exhausted from a cleaner (albeit possibly with a final exhaust filter to ensure as few particles as possible are entrained in the exhaust air flow), flow of air through and around the motor is very significant in terms of the overall noise level.
  • the motor to be disposed in a housing of which at least part has a double-wall construction with a space between inner and outer walls, through which exhaust air flows from the motor, containing a wadding material. This substantially reduces noise emission.
  • a construction is expensive, and presents some unwanted resistance to flow of air.
  • a housing for an electric motor for driving a fan for a vacuum cleaner comprising respective parts fitting together so that at least part of the housing comprises spaced inner and outer walls between which exhaust flow of air from the fan takes place, wherein there is provided at least one formation extending into the space between the inner and outer walls to cause the air to flow in an elongated flow path therebetween.
  • the spaced inner and outer walls may each be generally cylindrical so that an annular space is defined therebetween for flow of air.
  • the "straight-line" flow of air therebetween would be in the axial direction through the annular space, and in accordance with the invention some flow of air may be caused in the direction circumferentially of such an annular space.
  • the formation or formations which cause the air to flow in the elongated flow path may comprise at least one rib or vane extending from one or more of the housing parts into the space between the inner and outer walls thereof.
  • the at least one rib or vane may be part-helical in configuration, so that the flow path for air is at least partially helical, through the annular space.
  • rib or vane formations may be provided, each having a circumferential extent of approximately a quarter of the annular space between the inner and outer walls.
  • FIGS. 1 and 2 of the drawings depict a vacuum cleaner of the "cylinder" type, wherein the invention can be utilised. It comprises a body 10 having a pair of wheels 11, 12 on opposite sides of the body at a rear portion thereof, to enable the body to be moved over a floor surface as required. Although not shown in the drawings, there would also be provided a front wheel or wheels beneath the body towards the opposite, front end thereof. Also towards the front end thereof, the body accommodates a removable separator/collector assembly indicated generally at 14, for separating entrained dust and dirt from the suction air flow being drawn from whatever is being cleaned, and retaining such dust and dirt for later disposal. One or more cyclonic separator devices and/or filters may be utilised in the separator/collector.
  • FIG. 2 Shown in figure 2 is an inlet aperture 16 in the separator/collector assembly 14 for connection of a flexible suction hose whose other end has an inlet fitting for direct use as a suction nozzle, or connection to a wand or cleaning head, in known manner.
  • the suction air flow for cleaning as aforesaid is created by an electric motor and fan assembly which may be disposed where indicated at 18, generally in the rear part of the body 10 of the cleaner, between the wheels 11, 12 thereof.
  • a passage extends from the fan in the assembly 18 to a port which communicates with an outlet port of the separator/collector assembly 14, for outflow of the suction airflow after the separation of entrained dust and dirt therefrom in the assembly 14.
  • a pre-motor filter would be provided either in the body 10 of the cleaner or in the separator/collector assembly 14 for cleaning of the suction air flow before it passes to the motor and fan assembly 18. From the assembly 18, air is expelled to the external atmosphere, possibly by way of an exit filter so that little or no remaining dust is expelled to the external atmosphere.
  • FIGS. 3, 4, 5 and 6 of the drawings illustrate in exploded, cut away, and sectional views the arrangement of the electric motor and fan of the vacuum cleaner in relation to a housing therefor.
  • FIG 3 shows the housing for the motor comprising first and second housing parts 20, 22 and a cover ring 24.
  • the first housing part 20 is generally cup-shaped in configuration, with a generally cylindrical peripheral wall 26 stepped down in diameter as shown at 28, 30 leading to an annular end wall 32 which, as seen in figure 5, has an opening 34 therein.
  • the opening 34 provides for inflow of suction air to an assembly of an electric motor and fan, the casing of whose fan is indicated at 37 in figures 4 and 5 and the casing of whose motor is indicated at 38.
  • the fan casing 37 has an opening 40 for inflow of air to the fan within the casing, such opening 40 facing the opening 34 in the wall 32.
  • the second housing part 22 is a generally cup-shaped component but of smaller axial extent than the housing part 20.
  • the part 22 comprises a peripheral wall 46 of generally cylindrical configuration, and an end wall 48 closing the housing part 22 at its end remote from the end wall 32 of the housing part 20.
  • the motor and fan assembly 37, 38 is held between the housing parts 20, 22, the fan casing 37 being rubber-mounted within the wall portion 28 of the housing part 20 and the opposite end of the casing 38 of the motor being rubber mounted within a boss 50 on the wall 48 of the housing part 22.
  • the housing part 22 is secured to the housing part 20 by four circumferentially spaced outwardly extending lugs as indicated at 52, 53, 54, 55 provided on the housing part 22 where the peripheral wall 46 joins the end wall 48 thereof.
  • the lugs 52 to 55 are received in recesses in the flange 36 of the housing part 20, such recesses being indicated at 56 to 59, and support the two housing parts relative to one another so that the peripheral wall 46 is spaced inwardly of the peripheral wall part 26, with an annular space defined therebetween.
  • the cover ring 24 is fitted as shown in figures 4 and 5, engaging the flange part 36 of the housing part 20 and holding the lugs 52 to 55 in the recesses 56 to 59.
  • the cover ring 24 is secured by circumferentially spaced axially extending screws, each passing through a hole in the ring 24, an aligned hole in the respective lug e.g. as indicated at 62 in relation to the lug 52, and having engagement with a bore at the base of the recess in the housing part 20 as indicated at 64 in relation to the recess 56.
  • the cover ring has a cylindrical wall portion 25 which may accommodate or co-operate with a post-motor filter.
  • the peripheral wall 46 of the housing part 22 is provided with four circumferentially spaced ribs or vanes which extend radially outwardly from the wall 46 to touch or very nearly touch the internal surface of the peripheral wall part 26 of the housing part 20. Three of such ribs are visible at 66, 68, 70 with the shape of the rib 68 being particularly clearly visible in figure 5. It will be noted that it extends generally helically but of variable curvature, from the free end of the peripheral wall 46 of the housing part 22, to a base part of the lug 54 approximately two thirds of the distance to the end wall 48 of the housing part 22.
  • the arrangement of the ribs and lugs is such that air cannot flow axially in a straight line from one end to the other of the annular space defined between the peripheral walls 26, 46 of the two housing parts 22 but instead is forced to extend its flow path in a generally helical configuration.
  • the flow of air through the motor and fan assembly is as shown by the heavy arrows on figures 5 and 6.
  • the air flows through the fan and the motor to leave the motor at the end thereof remote from the fan, and then flows in the opposite direction, towards the fan casing, in an annular space defined between the motor casing 38 and the wall 46 of the housing part 22..
  • it flows in a generally helical path through the annular space between the walls 26, 46 guided by the ribs in such space. It then exits the motor housing assembly through the centre of the ring 24.
  • the above described path of air flow subsequent to having passed through the fan has a silencing effect, without providing an undue restriction to such flow of air.
  • the construction of the housing is straight forward, and the provision of wadding material or the like for quietening purposes is unnecessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Electric Vacuum Cleaner (AREA)
EP07250885A 2006-04-05 2007-03-02 Elektromotorgehäuse für eine Staubsaugergebläseeinheit Withdrawn EP1842473A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0606838A GB2436787A (en) 2006-04-05 2006-04-05 Electric motor housing

Publications (2)

Publication Number Publication Date
EP1842473A2 true EP1842473A2 (de) 2007-10-10
EP1842473A3 EP1842473A3 (de) 2008-05-14

Family

ID=36539359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07250885A Withdrawn EP1842473A3 (de) 2006-04-05 2007-03-02 Elektromotorgehäuse für eine Staubsaugergebläseeinheit

Country Status (6)

Country Link
US (1) US20070243087A1 (de)
EP (1) EP1842473A3 (de)
CN (1) CN101051772A (de)
AU (1) AU2007200836A1 (de)
GB (1) GB2436787A (de)
RU (1) RU2007112578A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010100447A1 (en) * 2009-03-03 2010-09-10 Dyson Technology Limited Cleaning appliance
DE102011006546B4 (de) * 2011-03-31 2013-07-04 BSH Bosch und Siemens Hausgeräte GmbH Gebläseanordnung
EP3184011A1 (de) * 2015-12-23 2017-06-28 Seb S.A. Geometrie eines luftkreislaufs für einen handsauger

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8728186B2 (en) * 2011-09-02 2014-05-20 Samsung Electronics Co., Ltd. Vacuum cleaner and dust separating apparatus thereof
TWI509953B (zh) * 2013-12-24 2015-11-21 Sunonwealth Electr Mach Ind Co 吊扇馬達
CN104104186A (zh) * 2014-06-30 2014-10-15 苏州蓝王机床工具科技有限公司 机电马达散热器
KR101509738B1 (ko) * 2014-10-27 2015-04-14 주식회사코네트인더스트리 진공청소기용 더스트컨테이너 조립체
JP2022011174A (ja) * 2020-06-29 2022-01-17 株式会社マキタ クリーナ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH053842A (ja) * 1991-06-28 1993-01-14 Sharp Corp 掃除機
DE19617265A1 (de) * 1996-02-10 1997-08-14 Vorwerk Co Interholding Schnellaufender Elektromotor
DE19739613A1 (de) * 1996-09-10 1998-03-12 Kwangju Electronics Co Mechanismus zur Lärmreduzierung bei einem Staubsauger
DE10221443A1 (de) * 2002-05-12 2003-12-04 Kern Gmbh Dr. Gebläse mit integriertem Schalldämpfer

Family Cites Families (13)

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US2726807A (en) * 1950-09-28 1955-12-13 Finnell System Inc Vacuum apparatus for water and dirt removal
US2731194A (en) * 1953-02-02 1956-01-17 Moss A Kent Vacuum cleaner blower
US3346174A (en) * 1966-07-05 1967-10-10 Trane Co Compact axial flow fan
CA1064209A (en) * 1975-06-18 1979-10-16 Matsushita Electric Industrial Co., Ltd. Fluid exhausting device
US4120616A (en) * 1975-10-06 1978-10-17 Breuer Electric Manufacturing Company Vacuum cleaner-blower assembly with sound absorbing arrangement
DE3027701A1 (de) * 1980-07-22 1982-02-11 Progress-Elektrogeräte Mauz & Pfeiffer GmbH & Co, 7000 Stuttgart Staubsauger
US4435877A (en) * 1982-09-30 1984-03-13 Shop-Vac Corporation Noise reducing means for vacuum cleaner
US4735555A (en) * 1985-10-01 1988-04-05 Rexair, Inc. Air blower assembly for vacuum cleaner
JPH0765597B2 (ja) * 1989-03-01 1995-07-19 株式会社日立製作所 電動送風機
US4970753A (en) * 1990-02-23 1990-11-20 Ryobi Motor Products Corp. Vacuum cleaner noise reducing arrangement
US5296769A (en) * 1992-01-24 1994-03-22 Electrolux Corporation Air guide assembly for an electric motor and methods of making
DE19741545A1 (de) * 1997-09-20 1999-03-25 Proair Geraetebau Gmbh Naßreinigungsgerät
KR100555205B1 (ko) * 2003-12-31 2006-03-03 삼성광주전자 주식회사 진공청소기

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH053842A (ja) * 1991-06-28 1993-01-14 Sharp Corp 掃除機
DE19617265A1 (de) * 1996-02-10 1997-08-14 Vorwerk Co Interholding Schnellaufender Elektromotor
DE19739613A1 (de) * 1996-09-10 1998-03-12 Kwangju Electronics Co Mechanismus zur Lärmreduzierung bei einem Staubsauger
DE10221443A1 (de) * 2002-05-12 2003-12-04 Kern Gmbh Dr. Gebläse mit integriertem Schalldämpfer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010100447A1 (en) * 2009-03-03 2010-09-10 Dyson Technology Limited Cleaning appliance
GB2468299B (en) * 2009-03-03 2012-06-20 Dyson Technology Ltd Noise reduction arrangement for a cleaning appliance.
US8397344B2 (en) 2009-03-03 2013-03-19 Dyson Technology Limited Cleaning appliance
DE102011006546B4 (de) * 2011-03-31 2013-07-04 BSH Bosch und Siemens Hausgeräte GmbH Gebläseanordnung
EP3184011A1 (de) * 2015-12-23 2017-06-28 Seb S.A. Geometrie eines luftkreislaufs für einen handsauger
WO2017109360A1 (fr) * 2015-12-23 2017-06-29 Seb S.A. Geometrie d'un circuit aeraulique pour un aspirateur a main
FR3046046A1 (fr) * 2015-12-23 2017-06-30 Seb Sa Geometrie d'un circuit aeraulique pour un aspirateur a main

Also Published As

Publication number Publication date
AU2007200836A1 (en) 2007-10-25
RU2007112578A (ru) 2008-10-20
GB2436787A (en) 2007-10-10
US20070243087A1 (en) 2007-10-18
GB0606838D0 (en) 2006-05-17
EP1842473A3 (de) 2008-05-14
CN101051772A (zh) 2007-10-10

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