EP0650690B1 - Vacuum cleaner device - Google Patents

Vacuum cleaner device Download PDF

Info

Publication number
EP0650690B1
EP0650690B1 EP94850189A EP94850189A EP0650690B1 EP 0650690 B1 EP0650690 B1 EP 0650690B1 EP 94850189 A EP94850189 A EP 94850189A EP 94850189 A EP94850189 A EP 94850189A EP 0650690 B1 EP0650690 B1 EP 0650690B1
Authority
EP
European Patent Office
Prior art keywords
electric motor
air flow
fan
turbo fan
cooling air
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
EP94850189A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0650690A1 (en
Inventor
Lars Gunnar Moren
Christer Caleb Ingemar Wiss
Magnus Carl Wilhelm Lindmark
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.)
Electrolux AB
Original Assignee
Electrolux AB
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 Electrolux AB filed Critical Electrolux AB
Publication of EP0650690A1 publication Critical patent/EP0650690A1/en
Application granted granted Critical
Publication of EP0650690B1 publication Critical patent/EP0650690B1/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
    • 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 vacuum cleaner.
  • Vacuum cleaners having a fan unit driven by an electric motor and placed after the dust bag as seen in the air flow direction, are previously known, see for instance US-A-2272985.
  • the primary air flow created by the fan unit is arranged to directly or indirectly leave the unit via an outlet to atmosphere.
  • first means creating a secondary air flow which at least partly cools the electric motor and which flows into the electric motor via one or several inlets which are separated from the primary air flow.
  • Vacuum cleaners operating with high speed electric motors are described in WO-A-94/15518 and WO-A-94/15519 and mainly have the advantage that they because of the small dimensions of the vacuum source (turbo fan unit), can be manufactured as small hand held appliances which are easy to handle and to store at the same time, as the suction power is on the same level as previously known traditional vacuum cleaners i.e. such having a power demand of 500 - 1.500 W.
  • the purpose of this invention is to achieve a device which gives a reliable cooling of the electric motor for a turbo fan unit described in said WO-publications at the high speed wich is used in this connection. This is achieved with a device having the characteristics mentioned in independent claim 1.
  • FIG. 1 in a schematic perspective view shows a vacuum cleaner according to the invention
  • Fig. 2 is a longitudinal vertical section through the hand held motor housing of the vacuum cleaner
  • Fig. 3 is a longitudinal vertical section through the turbo fan unit in the motor housing
  • Fig. 4 shows in the same view as Fig. 3 an alternative embodiment of the turbo fan unit
  • Fig. 5-7 in the same view show three additional embodiments of the invention.
  • the vacuum cleaner comprises a hand held motor housing 10 comprising a turbo fan arrangement 11 and a dust bag 12 the motor housing 10 via a tube shaft 13 being connected to a nozzle 14.
  • the motor housing is via a cable 15 connected to a stationary unit 16 which by means of a cable 17 and a plug 18 can be connected to the electric supply system.
  • the stationary unit comprises, with the exception of a cable reel, and additional accessories for the vacuum cleaner also the electronic equipment which is neccessary for running the electric motor.
  • Speed control is made by control means 19 placed on the motor housing.
  • the motor housing 10 comprises a plastic hood 20 having a handle 21 in which said control means are inserted.
  • the front end of the plastic hood is shaped as a lid 22 with a tube socket 23 to be fastened on the tube shaft 13.
  • the tube socket 23 opens into the dust bag 12 which is surrounded by a shell so that a tube shaped channel 24 is created.
  • the channel continues in the direction towards the rear part of the motor housing via a section 25 with gradually decreasing section area into an inlet 26 for a turbo fan unit 27 which is a part of the turbo fan arrangement 11.
  • the turbo fan unit 27 comprises a shell forming an inlet section 28 with gradually increasing section area and a turbo fan impeller 29 having blades in close vicinity of the section 28.
  • the turbo fan unit 27 also has an outlet 30.
  • the turbo fan impeller 29 which is a combined axial-radial impeller is fixed on a shaft 31 of an associated electric motor 32 the same shaft also supporting the rotor of the electric motor.
  • the electric motor is driven at a speed which is above 50.000 rpm and which preferably is 70.000 - 120.000 rpm.
  • the stator 34 of the electric motor is surrounded by a motor shell 35 which together with an outer shell part 36 forms an annular passage 37 in which the outlet 30 of the turbo fan unit opens.
  • the rear end of the motor shell 35 is shaped as a cut off tapered sleeve 38 one end of which together with the shell part 36 forms a radial outlet 39 with a filter 40 through which the air flow which the turbo fan unit 27 creates can leave to atmosphere.
  • the shaft 31 of the electric motor is at each side of the rotor 33 resting in a hub part 41 of the motor shell 35 and the shell has several openings 42, 43 for cooling air placed outside and near the hub part 41.
  • Cooling air which is drawn from an inlet 44 at the outer part of the sleeve 38 is supplied to or withdrawn from the rotor and stator windings of the electric motor by means of a fan 45.
  • This fan for cooling air is a centrifugal fan which is arranged at the rear side of the turbo fan impeller 29 so that the blades of the cooling fan are facing towards the electric motor.
  • the shell of the electric motor forms a fan housing in which the openings 42 are the inlets for the cooling fan whereas the outlet 46 of the fan is placed in close vicinity to the outlet 30 of the turbo fan unit.
  • the cooling fan 45 can of course be a part which is removable from the turbo fan impeller 29 or be integrated with it.
  • the device described in Fig. 1-3 operates in the following way.
  • the electric motor 32 is started which means that the shaft 31 with the turbo fan impeller 29 and the cooling fan 45 starts to rotate.
  • the turbo fan impeller creates a flow of air which is sucked through the nozzle 14 and which via the tube shaft 13 enters into the dust bag 12 in which the dust particles are separated from the air flow.
  • the air then continues through the channel 24 and the section 25, through the inlet 26 to the turbo fan unit 27 from which it escapes as a primary air flow through the outlet 30 to the annular passage 37 surrounding the motor shell 32 and cools the outside of the motor.
  • the device shown in Fig.4 differs from the device which is shown in Fig. 3 only with respect to the cooling air fan which is missing. Instead the passage 37 has a narrow section 47 which together with through openings 48 in the motor shell 31 forms a venturi which sucks cooling air from the inlet 44 via the openings 43 and through the motor.
  • this embodiment has the disadvantage that there is no cooling if the primary air flow is blocked which could happen if something clogges the nozzle or the tube shaft.
  • the embodiment shown in Fig. 5 has no separate cooling air fan. Instead the turbo fan impeller 29 is used in order to suck the cooling air from the inlet 44 of the cooling air through the electric motor via one or several channels 49 extending from the inside 35 of the motor shell to a chamber 50 outside the shell part 36 the chamber via one or several openings 51 communicating with the inlet 26 of the turbo fan unit.
  • a cooling air fan 52 is used which is placed at the inlet 44 for the cooling air i.e. at the opposite side of the electric motor with respect to the turbo fan impeller.
  • the air is by means of the cooling air fan forced through the electric motor and into the primary air flow through openings 53 in the motor shell.
  • Fig. 7 shows an arrangement which is similar to the arrangement shown in Fig. 3 but in which there is a seperate annular deflector plate 54 surrounding the rear part of the impeller 29.
  • the plate 54 is placed at a distance from the motor shell 35 so that a passage 55 is formed through which the cooling air flow from the fan 45 enters into the primary flow in the passage 37 mainly in the same direction as the primary flow.
  • This arrangement has proved to give a considerable increase in the suction power.

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)
  • Nozzles For Electric Vacuum Cleaners (AREA)
  • Motor Or Generator Cooling System (AREA)
EP94850189A 1993-11-02 1994-10-26 Vacuum cleaner device Expired - Lifetime EP0650690B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9303598A SE501982C2 (sv) 1993-11-02 1993-11-02 Anordning vid en dammsugare
SE9303598 1993-11-02

Publications (2)

Publication Number Publication Date
EP0650690A1 EP0650690A1 (en) 1995-05-03
EP0650690B1 true EP0650690B1 (en) 1998-07-08

Family

ID=20391602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94850189A Expired - Lifetime EP0650690B1 (en) 1993-11-02 1994-10-26 Vacuum cleaner device

Country Status (10)

Country Link
EP (1) EP0650690B1 (fi)
JP (1) JPH07178012A (fi)
CN (1) CN1110908A (fi)
CA (1) CA2134732A1 (fi)
DE (1) DE69411498T2 (fi)
ES (1) ES2119139T3 (fi)
FI (1) FI945144A (fi)
NO (1) NO944117L (fi)
RU (1) RU94041751A (fi)
SE (1) SE501982C2 (fi)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11844486B2 (en) 2016-03-31 2023-12-19 Lg Electronics Inc. Cleaner
US12121199B2 (en) 2016-03-31 2024-10-22 Lg Electronics Inc. Cleaner

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100384980B1 (ko) * 1998-04-03 2003-06-02 마츠시타 덴끼 산교 가부시키가이샤 회전 브러시 장치 및 이를 이용한 전기 기구
GB0008370D0 (en) 2000-04-06 2000-05-24 Reckitt & Colmann Prod Ltd Improvements in or relating to electric appliances
KR100357516B1 (ko) * 2000-06-30 2002-10-18 삼성광주전자 주식회사 배기환류 청소기
DE10245798B4 (de) 2002-10-01 2004-08-19 Robert Bosch Gmbh Elektrisch betriebener Ladeluftverdichter mit integrierter Luftkühlung
DE102005025865A1 (de) * 2005-06-06 2006-12-07 Gebr. Becker Gmbh & Co Kg Radialgebläse
CN101793257B (zh) 2005-06-06 2013-06-19 格布尔·贝克尔有限责任公司 离心鼓风机
WO2007035695A2 (en) * 2005-09-19 2007-03-29 Ingersoll-Rand Company Air blower for a motor-driven compressor
FR2910078B1 (fr) * 2006-12-18 2009-02-13 Airfan Soc Par Actions Simplif Ventilateur pour appareil de delivrance regulee d'un gaz notamment d'oxygene.
WO2017171496A1 (ko) 2016-03-31 2017-10-05 엘지전자 주식회사 청소기
US11166607B2 (en) 2016-03-31 2021-11-09 Lg Electronics Inc. Cleaner
US10575689B2 (en) 2016-03-31 2020-03-03 Lg Electronics Inc. Cleaner
WO2017171499A1 (ko) 2016-03-31 2017-10-05 엘지전자 주식회사 청소기
KR102560970B1 (ko) 2016-03-31 2023-07-31 엘지전자 주식회사 청소기
JP2018105268A (ja) * 2016-12-28 2018-07-05 日本電産株式会社 送風装置及びそれを備えた掃除機
EP3376043B1 (en) 2017-03-16 2020-12-09 LG Electronics Inc. Motor fan
EP3845106A1 (en) * 2019-12-30 2021-07-07 Koninklijke Philips N.V. A pump for use in a vacuum cleaner
CN114652214B (zh) * 2020-12-23 2023-01-13 宁波方太厨具有限公司 一种用于清洁机的分离模块及具有该分离模块的清洁机
DE102022104670A1 (de) 2022-02-28 2023-08-31 Miele & Cie. Kg Strömungsmaschine
WO2024003567A1 (en) * 2022-06-29 2024-01-04 Dyson Technology Limited Vacuum cleaner

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR811248A (fr) * 1935-09-25 1937-04-09 Mauz Et Pfeiffer Aspirateur de poussières avec boîte intermédiaire à montage souple dans laquelle est monté élastiquement le bloc moto-souffleur
US2272985A (en) * 1939-10-14 1942-02-10 Spencer Turbine Co Motor mounting for vacuum cleaners
US2531342A (en) * 1947-03-31 1950-11-21 Landers Frary & Clark Vacuum cleaner
SE470563B (sv) * 1993-01-08 1994-08-29 Electrolux Ab Dammsugare

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11844486B2 (en) 2016-03-31 2023-12-19 Lg Electronics Inc. Cleaner
US12121199B2 (en) 2016-03-31 2024-10-22 Lg Electronics Inc. Cleaner

Also Published As

Publication number Publication date
SE9303598L (sv) 1995-05-03
NO944117D0 (no) 1994-10-28
RU94041751A (ru) 1996-11-10
JPH07178012A (ja) 1995-07-18
DE69411498T2 (de) 1999-02-18
CA2134732A1 (en) 1995-05-03
SE501982C2 (sv) 1995-07-03
FI945144A (fi) 1995-05-03
DE69411498D1 (de) 1998-08-13
FI945144A0 (fi) 1994-11-01
NO944117L (no) 1995-05-03
CN1110908A (zh) 1995-11-01
EP0650690A1 (en) 1995-05-03
SE9303598D0 (sv) 1993-11-02
ES2119139T3 (es) 1998-10-01

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