EP0455659B1 - Appareil de nettoyage haute-pression - Google Patents

Appareil de nettoyage haute-pression Download PDF

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Publication number
EP0455659B1
EP0455659B1 EP90901809A EP90901809A EP0455659B1 EP 0455659 B1 EP0455659 B1 EP 0455659B1 EP 90901809 A EP90901809 A EP 90901809A EP 90901809 A EP90901809 A EP 90901809A EP 0455659 B1 EP0455659 B1 EP 0455659B1
Authority
EP
European Patent Office
Prior art keywords
pressure
line
combustion engine
pump
pressure line
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
EP90901809A
Other languages
German (de)
English (en)
Other versions
EP0455659A1 (fr
Inventor
Bertram GRÖGER
Helmut Komp
Rudi Schwaderer
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.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and Co KG
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 Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP0455659A1 publication Critical patent/EP0455659A1/fr
Application granted granted Critical
Publication of EP0455659B1 publication Critical patent/EP0455659B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B08B2203/0205—Bypass pressure relief valves
    • 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
    • B08B2203/0241—Combustion motor pumps
    • 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
    • B08B2203/027—Pump details

Definitions

  • the invention relates to a high-pressure cleaning device with a high-pressure pump driven by an internal combustion engine, from the pressure line of which a bypass line that opens when the pressure line is closed leads to the suction side of the pump, and to a pressure sensor in the pressure line.
  • the high-pressure pump In the case of high-pressure cleaners that work anywhere, the high-pressure pump is often driven by an internal combustion engine. When the spray line is open, the internal combustion engine drives the pump with the power required for operation. If the spray gun of the high-pressure pump is closed, this would lead to excessive heating of the pump, which will then no longer be traversed by liquid.
  • a decrease in the pressure in the pressure line occurs when the bypass line is opened, so that a reduction in the power transmitted to the pump is automatically obtained by reducing the speed of the internal combustion engine.
  • the pressure in the pressure line rises again when the bypass line is closed when the spray gun is opened as a result of the pressure drop which then occurs first.
  • This increase in pressure then leads again to an increase in the speed of the internal combustion engine via the pressure sensor and thus to the transmission of the power required for normal operation to the high-pressure pump. It is very advantageous that the opening and closing of the bypass line is controlled depending on the flow by a flow sensor that detects the flow in the pressure line.
  • the bypass line is opened, as soon as the flow through the pressure line is resumed by opening the spray gun, the bypass capacity is closed immediately.
  • This immediate closing or opening of the bypass line depending on the flow in the pressure line supports the pressure changes in the pressure line and thus the speed change of the internal combustion engine.
  • the pressure sensor adjusts the gas linkage of the internal combustion engine in the direction of an increase in the speed when the determined pressure value is exceeded.
  • This intervention on the gas linkage of the internal combustion engine makes it possible to operate the internal combustion engine with its own control, which is not interfered with.
  • This also enables a corresponding speed control for an internal combustion engine to be retrofitted in a simple manner, since it is sufficient to insert a corresponding actuating element which adjusts the gas linkage as a function of the position of the pressure sensor.
  • the pressure sensor preferably actuates a Bowden cable that engages the gas linkage.
  • the pressure sensor has an actuating piston which is displaceable against a spring force and acted upon by the pressure in the pressure line, the movement of which is transferred to the movement of the gas linkage.
  • the actuating piston is a stepped piston which is sealed in a cylindrical housing and that a measuring line connected to the pressure line opens into the annular space formed between the piston and the cylindrical housing.
  • the result is a particularly compact unit that can be easily retrofitted to a pressure line of a high-pressure cleaning device, whereby a mechanically stable and less susceptible construction is found by transferring the piston position to the gas linkage via a Bowden cable.
  • a high-pressure cleaning device as is shown schematically in FIG. 1, comprises a high-pressure pump 1, which is driven by an internal combustion engine 2.
  • the suction line 3 of the high pressure pump is connected to a storage vessel 4 or another supply line, the pressure line 5 of the high pressure pump 1 leads to a closable spray gun 6.
  • a bypass line 7 branches off from the pressure line 5 and leads back to the suction line 3 of the high-pressure pump 1.
  • the bypass line 7 is normally closed by means of a closing valve 8, but it is opened when the pressure line 5 is closed, for example by releasing the spray gun 6.
  • This can be controlled by a flow monitor in the pressure line or by pressure difference measurements in constrictions of the pressure line. This ensures, in a manner known per se, that when the spray gun is closed, the liquid delivered by the pump is returned through the bypass line to the suction side of the pump and is therefore only conveyed by the pump in the circuit, while the liquid is open when the spray gun is open and when it is closed accordingly Bypass line directly to the spray gun is fed.
  • a pressure sensor 9 which is connected via a Bowden cable 10 to the throttle lever 11 of the internal combustion engine 2 and, by actuating the Bowden cable 10, shifts the throttle lever 11 from a low speed position to a higher speed position and vice versa.
  • FIG. 2 A preferred embodiment of such a pressure sensor 9 is shown in Figure 2.
  • This pressure sensor 9 comprises a housing 12 with a stepped blind hole 13, which is closed by a threaded plug 14.
  • a stepped piston 17 is mounted so as to be longitudinally displaceable, sealed against the inner wall thereof by means of sealing rings 15 and 16, and receives a compression spring 19 in a front hole 18, which is supported at the other end on the threaded plug 14 and thus the stepped piston 17 against the floor 20 of the blind hole 13 presses.
  • the stepped design of both the blind bore 13 and the stepped piston 17 results in a sealed annular space 21 between the stepped piston 17 on the one hand and the inner wall of the blind hole 13 on the other hand, which is connected to a measuring opening 22 which extends through the housing and is attached to the wall.
  • This can be connected to the pressure line 5 via a measuring line (not shown in the drawing), it is also possible to switch this measuring opening 22 directly into the pressure line 5.
  • the measuring opening 22 By connecting the measuring opening 22 to the annular space 21, the latter is conveyed through the pressure line 5 Liquid filled, which removes the step piston 17 against the action of the compression spring 19 from the bottom 20 of the blind bore 13 when the pressure rises.
  • the core 23 of the Bowden cable 10 is held, which leaves the bottom 20 of the blind bore 13 through a screwed-in threaded sleeve 24 and is guided in a spiral jacket 25 supported on the threaded sleeve 24 up to the throttle lever 11.
  • the other end of the spiral jacket 25 is supported on a stop on the internal combustion engine 2.
  • the pressure in the pressure line is removed via a mechanically operating pressure sensor, which transmits the movement of the control piston directly to the engine via a Bowden cable.
  • a mechanically operating pressure sensor which transmits the movement of the control piston directly to the engine via a Bowden cable.
  • other transmission paths instead of the Bowden cable, for example a hydraulic transmission or also an electrical transmission when using an electrical pressure sensor.

Landscapes

  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Measuring Fluid Pressure (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

Un appareil de nettoyage haute pression comprend une pompe haute pression (1) entraînée par un moteur à combustion interne. Une dérivation (7) allant de la conduite de refoulement (5) de la pompe au côté aspiration (3) de la pompe (1) s'ouvre lorsque la conduite de refoulement (5) est fermée. Une sonde de pression (9) est située dans la conduite de refoulement (5). Afin d'adapter la puissance du moteur à combustion interne (2) aux conditions de fonctionnement régnantes, la sonde de pression (9) réduit la vitesse du moteur à combustion interne (2) dès que la pression dans la conduite de refoulement (5) tombe au-dessous d'une valeur donnée.

Claims (5)

  1. Appareil de nettoyage à haute pression, comprenant une pompe à haute pression entraînée par un moteur à combustion interne, avec une conduite de bypass qui mène depuis la conduite de refoulement de la pompe jusqu'à la conduite d'aspiration de la pompe, cette conduite de bypass s'ouvrant lorsque la conduite de refoulement est fermée, et comprenant un capteur de pression dans la conduite de refoulement, caractérisé en ce que le capteur de pression (9) réduit la vitesse de rotation du moteur à combustion interne (2) dès que la pression dans la conduite de refoulement (5) chute au-dessous d'une valeur donnée, et en ce qu'un détecteur d'écoulement est agencé dans la conduite de refoulement, ce détecteur ouvrant la conduite de bypass (7) en l'absence d'écoulement.
  2. Appareil de nettoyage à haute pression selon la revendication 1, caractérisé en ce que le capteur de pression (9) déplace la commande des gaz (11) du moteur à combustion interne (2) en direction d'une augmentation de la vitesse de rotation lors du dépassement d'une valeur de pression déterminée.
  3. Appareil de nettoyage à haute pression selon la revendication 2, caractérisé en ce que le capteur de pression (9) actionne un câble Bowden (10) qui attaque la commande des gaz (11).
  4. Appareil de nettoyage à haute pression selon l'une ou l'autre des revendications 2 ou 3, caractérisé en ce que le capteur de pression (9) comprend un piston de positionnement (17) susceptible d'être déplacé à l'encontre de la force d'un ressort et sollicité par la pression dans la conduite de refoulement (5), le déplacement dudit piston étant transmis au déplacement de la commande des gaz (11).
  5. Appareil de nettoyage à haute pression selon la revendication 4, caractérisé en ce que le piston de positionnement (17) est un piston étagé (17) mobile et reçu de façon étanche dans un boîtier cylindrique (12) et, en ce qu'une conduite de mesure (22) en communication avec la conduite de refoulement (5) débouche dans l'espace annulaire (21) constitué entre le piston (17) et le boîtier cylindrique (12).
EP90901809A 1989-01-26 1990-01-04 Appareil de nettoyage haute-pression Expired - Lifetime EP0455659B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3902252A DE3902252C1 (fr) 1989-01-26 1989-01-26
DE3902252 1989-01-26
PCT/EP1990/000009 WO1990008602A1 (fr) 1989-01-26 1990-01-04 Appareil de nettoyage haute-pression

Publications (2)

Publication Number Publication Date
EP0455659A1 EP0455659A1 (fr) 1991-11-13
EP0455659B1 true EP0455659B1 (fr) 1994-04-27

Family

ID=6372826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90901809A Expired - Lifetime EP0455659B1 (fr) 1989-01-26 1990-01-04 Appareil de nettoyage haute-pression

Country Status (8)

Country Link
US (1) US5174723A (fr)
EP (1) EP0455659B1 (fr)
JP (1) JPH04502425A (fr)
AU (1) AU4956990A (fr)
CA (1) CA2045457C (fr)
DE (2) DE3902252C1 (fr)
DK (1) DK0455659T5 (fr)
WO (1) WO1990008602A1 (fr)

Families Citing this family (27)

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Publication number Priority date Publication date Assignee Title
US5320280A (en) * 1992-06-19 1994-06-14 Graco Inc. Pneumatically controlled spraying system having a diaphragm-operated switch
DE9211472U1 (de) * 1992-08-26 1994-01-05 Dolmar GmbH, 22045 Hamburg Hochdruckreinigungsgerät
US5397054A (en) * 1992-08-26 1995-03-14 Dolmar Gmbh Pressure jet cleaning appliance
US5529460A (en) * 1993-07-28 1996-06-25 Coleman Powermate, Inc. Pressure washer with flow control switch
DE29501209U1 (de) * 1995-01-26 1996-05-23 Dolmar GmbH, 22045 Hamburg Druckreinigungsgerät
US6206980B1 (en) 1997-11-13 2001-03-27 Kaivac, Inc. Multi-functional cleaning machine
US6056207A (en) * 1998-04-30 2000-05-02 Sioux Steam Cleaner Corporation Cleaner with temperature control
US6648603B2 (en) * 2000-02-17 2003-11-18 Devilbiss Air Power Company Pressure washer engine idle controller
NL1015139C2 (nl) * 2000-05-09 2003-08-13 Waterkracht Bv Werkwijze en inrichting voor reiniging met water.
DE10146289A1 (de) * 2001-05-17 2002-11-21 Juergen Weigel & Herbert Eberh Verfahren zur Steuerung eines Hochdruckreinigungsgeräts
DE10218143A1 (de) * 2002-04-23 2003-11-13 Alto Deutschland Gmbh Sicherheitsfernsteuerung für den Betrieb von Hochdruckreinigern
US7255539B1 (en) * 2002-05-09 2007-08-14 Clarke Fire Protection Products Pump pressure limiting engine speed control
US7128539B2 (en) * 2002-05-31 2006-10-31 Titan Tool, Inc Method for improved cleaning of a pumping system
US6939110B2 (en) * 2002-11-06 2005-09-06 Clarke Engineering Technologies, Inc. Control system for I.C. engine driven blower
US20050081898A1 (en) * 2003-10-15 2005-04-21 Steve Williams All purpose cleaning machine
US20090317262A1 (en) * 2006-07-17 2009-12-24 Briggs & Stratton Corporation Engine speed control for pressure washer
US8038413B2 (en) * 2006-07-17 2011-10-18 Briggs And Stratton Corporation Idle down control for a pressure washer
US20100282862A1 (en) * 2009-05-06 2010-11-11 Briggs & Stratton Corporation Pressure washer with throttle control
US7926740B2 (en) * 2007-04-04 2011-04-19 Black & Decker Inc. Pressure washer system and operating method
WO2009067434A1 (fr) * 2007-11-21 2009-05-28 Clarke Fire Protection Products, Inc. Dispositif de commande de vitesse limitant la pression d'aspiration d'une pompe et système d'entraînement de pompe concernée et d'arrosage
US20110142685A1 (en) * 2009-12-16 2011-06-16 Briggs & Strantton Corporation Pump unloader valve and engine throttle system
WO2012170394A1 (fr) 2011-06-09 2012-12-13 Clarke Fire Protection Products, Inc. Agencements de refroidissement pour des pompes à incendie d'un système d'extincteurs à des fins d'extinction d'incendie
DE102014107171A1 (de) 2014-05-21 2015-11-26 Alfred Kärcher Gmbh & Co. Kg Hochdruckreinigungsgerät
CN106076919A (zh) * 2016-06-06 2016-11-09 淮南市鸿裕工业产品设计有限公司 一种高压清洗机压力调控器
CN109092810A (zh) * 2017-06-21 2018-12-28 上海恒亚实业有限公司 一种管道疏通机
JP2020097900A (ja) * 2018-12-17 2020-06-25 工機ホールディングス株式会社 液体吐出装置
CN111359951A (zh) * 2018-12-26 2020-07-03 永康三久工具有限公司 一种高压清洗机

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BE504843A (fr) *
DE542445C (de) * 1930-12-19 1932-01-23 Oerlikon Maschf Selbsttaetige Reguliereinrichtung von durch Brennkraftmaschinen angetriebenen Verdichtern
US3977603A (en) * 1975-10-22 1976-08-31 Partek Corporation Of Houston Fluid delivery system
US4238073A (en) * 1979-03-26 1980-12-09 Miroslav Liska Paint spray apparatus having pressure actuated control
US4353336A (en) * 1980-01-10 1982-10-12 Lucas Industries Limited Fuel pumping apparatus
DE8128510U1 (de) * 1981-09-29 1982-04-22 Frank'sche Eisenwerke Ag, 6340 Dillenburg "spritzeinrichtung fuer reinigungsgeraete, pflanzenschutzgeraete oder aehnliche geraete"
JPS58102406A (ja) * 1981-12-12 1983-06-18 アルプス電気株式会社 透明導電性被膜形成用ペ−スト
JPS59196941A (ja) * 1983-04-25 1984-11-08 Ebara Corp 内燃機関駆動ポンプの自動運転装置
US4545740A (en) * 1984-09-20 1985-10-08 Ebara Corporation Automatic operating system for pump driven by internal combustion engine
US4527953A (en) * 1984-10-12 1985-07-09 E. I. Du Pont De Nemours And Company Pump unit for sampling air
DE3443354A1 (de) * 1984-11-28 1986-05-28 Robert Bosch Gmbh, 7000 Stuttgart Hydraulikanlage
US5035580A (en) * 1989-09-14 1991-07-30 Diversified Dynamics Corporation Bypass mode control for high pressure washing system

Also Published As

Publication number Publication date
DE59005539D1 (de) 1994-06-01
WO1990008602A1 (fr) 1990-08-09
AU4956990A (en) 1990-08-24
CA2045457C (fr) 1995-06-06
DE3902252C1 (fr) 1990-01-18
CA2045457A1 (fr) 1990-07-27
DK0455659T5 (da) 1994-08-22
EP0455659A1 (fr) 1991-11-13
US5174723A (en) 1992-12-29
JPH04502425A (ja) 1992-05-07

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