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WO1993003865A1 - Appareil de nettoyage a haute pression - Google Patents

Appareil de nettoyage a haute pression Download PDF

Info

Publication number
WO1993003865A1
WO1993003865A1 PCT/EP1992/001849 EP9201849W WO9303865A1 WO 1993003865 A1 WO1993003865 A1 WO 1993003865A1 EP 9201849 W EP9201849 W EP 9201849W WO 9303865 A1 WO9303865 A1 WO 9303865A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
pump
cleaning device
electric motor
pressure cleaning
Prior art date
Application number
PCT/EP1992/001849
Other languages
German (de)
English (en)
Inventor
Robert Nathan
Original Assignee
Alfred Kärcher GmbH & Co.
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 Alfred Kärcher GmbH & Co. filed Critical Alfred Kärcher GmbH & Co.
Priority to DE59204379T priority Critical patent/DE59204379D1/de
Priority to EP92917910A priority patent/EP0620766B1/fr
Publication of WO1993003865A1 publication Critical patent/WO1993003865A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • B08B3/028—Spray guns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/002—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour incorporating means for heating or cooling, e.g. the material to be sprayed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/01—Spray pistols, discharge devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/0235—Cooling the motor pump

Definitions

  • the invention relates to a high-pressure cleaning device with an electric motor, a pump driven by the latter for a liquid cleaning medium, a closed housing surrounding the electric motor, a blower driven by the electric motor and producing a gas stream rotating in the housing and cooling the electric motor se and with a cooler for the gas flow arranged in the housing and through which the cleaning medium flows.
  • Such cooling is very effective, but it is not suitable for cleaning devices in which the motor has to be completely encapsulated against environmental influences. This is necessary, for example, if the electric motor and the pump are to be accommodated in a hand-held device which, for safety reasons, must still work safely even when completely immersed in a liquid and which nevertheless must not endanger the user.
  • the pump simultaneously takes over the function of the cooler for the gas flow generated in the housing, so that a separate cooler is unnecessary.
  • this has the advantage that one component is completely saved compared to known constructions, on the other hand, the movement is transmitted from the electric motor to the pump within the housing, so that complex rotary unions are saved. Nevertheless, an effective cooling of the gas flow in the housing is obtained, since the cleaning liquid flows through the pump, which can thus dissipate the heat supplied by the gas flow.
  • the pump consists of a material that is a good conductor of heat, for example die-cast aluminum.
  • the pump is arranged completely inside the housing and the gas stream flows around it. This results in a particularly large surface area for the heat transfer, so that the cooling of the gas stream can be optimized.
  • the electric motor and the pump form a structural unit.
  • a gearbox can be inserted between the electric motor and the pump.
  • the housing can be made completely airtight and liquid-tight, with provision being made, inter alia, for the feed lines and discharge lines of the pump to be guided through the housing wall in a sealed manner.
  • only one bushing is then required for the electrical supply line leading to the electric motor; moreover, the housing can be made completely closed. This simplifies the construction and increases operational safety.
  • the overall cooling capacity can be increased if the housing has cooling fins on its outside and / or on its inside. With such a construction, the heat transfer via the housing wall itself is also used.
  • the heat transfer area to the pump arranged in the housing can also be increased, for example by carrying cooling fins on its outside.
  • FIG. 1 a side view of a partially cut-open, portable high-pressure cleaning device in a closed unit made up of an electric motor and pump and
  • Figure 2 a view similar to Figure 1 with additional cooling fins on the housing.
  • the invention is discussed using the example of a portable high-pressure cleaning device, but it can in principle also be used in other high-pressure cleaning devices in which encapsulation of the electric motor is desired.
  • the portable high-pressure cleaning device shown in the drawing essentially comprises three parts, namely a central housing 1 for receiving an electric motor 2 and a pump 3, a handle part 4 connecting to the housing 1 and one on the opposite side of the handle part 4 arranged jet pipe 5.
  • a closing valve also not shown in the drawing, which can be opened or closed as desired by means of a movable switching lever 7.
  • electrical switching elements in the grip part with which the operation of the electric motor 2 can be controlled.
  • the housing 1 arranged between the jet pipe 5 on the one hand and the handle part 4 on the other hand is designed as a completely closed housing, which has a sealed bushing 8 on its upper side for a suction line 9 connected to the supply line 6 and one on the opposite side likewise has a sealed bushing 10 for a pressure line 11 leading to the jet pipe 5 and to an outlet of the high-pressure cleaning device.
  • the pump 3 is inserted, which can be designed, for example, as a two-piston pump.
  • the pump 3 is located in a metallic pump housing 12, which can consist, for example, of die-cast aluminum, and this pump housing 12 is arranged in the housing 1 such that an annular gap is formed between the housing 1 and the pump housing 12, through which the suction line 9 and the pressure line 11 pass at a distance from the upper side 13 of the housing 1.
  • a motor housing 14 adjoins the underside of the pump housing 12, in which the electric motor 2 designed as a universal motor is held with a vertically arranged drive shaft 15.
  • the drive shaft 15 is mounted in the motor housing 14 by means of a ball bearing 16 and meshes with a free end formed as a pinion 17 with a gear 18 on an axle stub 19 which projects downward from the pump housing 12 and which in turn is in a ball bearing 20 of the motor housing 14 is mounted.
  • the pinion 17 and the gear 18 form a gear 21 inserted between the electric motor 2 and the pump 3, which is arranged in a separate chamber 22 on the top of the motor housing 14.
  • the electric motor 2 On its side opposite the transmission 21, the electric motor 2 carries a fan wheel 23 on the drive shaft 15, which achieves a circulation of the gas filling in the interior of the closed housing 1 in such a way that a gas flow is passed through the electric motor 2 and past the transmission 21, then passes around the pump housing 12 and is returned to the fan wheel 23 in an annular gap between the housing 1 and the motor housing 14.
  • the waste heat generated by the electric motor 2 is conducted to the pump housing 12 through this closed circuit. This is flowed through by the cleaning liquid and acts as a cooler for the gas flow, which, after the pump housing 12 has been turned around, is cooled and passed to the fan wheel 23. returns.
  • the cooling of the gas flow takes place not only through the pump housing 12 itself, but also through the suction line 9 leading to the pump and the pressure line 11 leading away from the pump, which are also freely flowable.
  • the cooling effect can be increased in that additional cooling fins are arranged on the outside of the pump housing 12, which increase the contact area.
  • Cooling fins 24 and 25 can also be integrally formed on the outside and on the inside of the housing 1, so that the wall of the housing 1 also contributes to cooling the gas stream by direct heat exchange with the surroundings (FIG. 2).
  • the housing can also consist of an impact-resistant plastic.

Landscapes

  • Cleaning By Liquid Or Steam (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

Il est proposé, pour simplifier la construction d'un appareil de nettoyage à haute pression comportant un moteur électrique (2), une pompe (3) entraînée par ce dernier pour un liquide de nettoyage, un carter (1) fermé entourant le moteur électrique (2), une soufflante (23) entraînée par le moteur électrique (2), produisant un flux de gaz circulant dans le carter (1) et refroidissant le moteur électrique, et pourvu d'un refroidisseur disposé dans le carter (1) pour le flux de gaz et traversé par le liquide de nettoyage, que la pompe (3) soit au moins partiellement disposée dans le carter (1) et en contact de transmission thermique avec le flux de gaz du carter (1)
PCT/EP1992/001849 1991-08-14 1992-08-13 Appareil de nettoyage a haute pression WO1993003865A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59204379T DE59204379D1 (de) 1991-08-14 1992-08-13 Hochdruckreinigungsgerät.
EP92917910A EP0620766B1 (fr) 1991-08-14 1992-08-13 Appareil de nettoyage a haute pression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4126798.2 1991-08-14
DE4126798 1991-08-14

Publications (1)

Publication Number Publication Date
WO1993003865A1 true WO1993003865A1 (fr) 1993-03-04

Family

ID=6438234

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1992/001849 WO1993003865A1 (fr) 1991-08-14 1992-08-13 Appareil de nettoyage a haute pression

Country Status (4)

Country Link
EP (1) EP0620766B1 (fr)
DE (2) DE9215217U1 (fr)
DK (1) DK0620766T3 (fr)
WO (1) WO1993003865A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1951435A4 (fr) * 2005-11-16 2008-11-26 Faip North America Inc Nettoyeur haute pression portatif electrique

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10101277B4 (de) * 2001-01-12 2006-11-02 Wacker Construction Equipment Ag Hochfrequenz-Innenrüttler mit gekühltem elektronischen Frequenzumformer
US7854398B2 (en) 2005-10-26 2010-12-21 Techtronic Outdoor Products Technology Limited Hand held pressure washer
US8444068B2 (en) 2005-10-26 2013-05-21 Techtronic Outdoor Products Technology Limited Dual flow pressure washer
US8425203B2 (en) 2008-04-25 2013-04-23 Techtronic Outdoor Products Technology Limited Portable pressure washer system
CN212508678U (zh) 2015-11-20 2021-02-09 苏州宝时得电动工具有限公司 手持式高压清洗机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3115698C1 (de) * 1981-04-18 1982-12-16 Alfred Kärcher GmbH & Co, 7057 Winnenden Motorpumpeneinheit fuer ein Hochdruckreinigungsgeraet
EP0177925A1 (fr) * 1984-10-08 1986-04-16 K.E.W. Industri A/S Ensemble moteur-pompe pour une unité de nettoyage à haute pression
US4597720A (en) * 1979-07-26 1986-07-01 Friedrichs Ingo H Cleaning apparatus for the wet cleaning of building walls and floors, swimming pools, automobiles and the like
DE8801028U1 (de) * 1987-11-13 1988-03-10 Westergaard, Knud Erik, Hadsund Hochdruckreinigungsgerät
EP0420473A1 (fr) * 1989-09-23 1991-04-03 Black & Decker Inc. Appareil de nettoyage haute pression de main

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4597720A (en) * 1979-07-26 1986-07-01 Friedrichs Ingo H Cleaning apparatus for the wet cleaning of building walls and floors, swimming pools, automobiles and the like
DE3115698C1 (de) * 1981-04-18 1982-12-16 Alfred Kärcher GmbH & Co, 7057 Winnenden Motorpumpeneinheit fuer ein Hochdruckreinigungsgeraet
EP0177925A1 (fr) * 1984-10-08 1986-04-16 K.E.W. Industri A/S Ensemble moteur-pompe pour une unité de nettoyage à haute pression
DE8801028U1 (de) * 1987-11-13 1988-03-10 Westergaard, Knud Erik, Hadsund Hochdruckreinigungsgerät
EP0420473A1 (fr) * 1989-09-23 1991-04-03 Black & Decker Inc. Appareil de nettoyage haute pression de main

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1951435A4 (fr) * 2005-11-16 2008-11-26 Faip North America Inc Nettoyeur haute pression portatif electrique

Also Published As

Publication number Publication date
EP0620766A1 (fr) 1994-10-26
EP0620766B1 (fr) 1995-11-15
DE59204379D1 (de) 1995-12-21
DK0620766T3 (da) 1995-12-18
DE9215217U1 (de) 1993-01-14

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