EP0263196B1 - Hochdruck-Reinigungsgerät - Google Patents

Hochdruck-Reinigungsgerät Download PDF

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Publication number
EP0263196B1
EP0263196B1 EP86113964A EP86113964A EP0263196B1 EP 0263196 B1 EP0263196 B1 EP 0263196B1 EP 86113964 A EP86113964 A EP 86113964A EP 86113964 A EP86113964 A EP 86113964A EP 0263196 B1 EP0263196 B1 EP 0263196B1
Authority
EP
European Patent Office
Prior art keywords
pressure
pump
valve
safety
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
EP86113964A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0263196A1 (de
Inventor
Guido Oberdorfer
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.)
WAP Reinigungssysteme GmbH and Co
Original Assignee
WAP Reinigungssysteme GmbH and 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 WAP Reinigungssysteme GmbH and Co filed Critical WAP Reinigungssysteme GmbH and Co
Priority to DE8686113964T priority Critical patent/DE3673650D1/de
Publication of EP0263196A1 publication Critical patent/EP0263196A1/de
Application granted granted Critical
Publication of EP0263196B1 publication Critical patent/EP0263196B1/de
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
    • B08B2203/007—Heating the liquid
    • 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
    • B08B2203/0282—Safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2230/00—Other cleaning aspects applicable to all B08B range
    • B08B2230/01—Cleaning with steam

Definitions

  • the invention relates to a high-pressure cleaning device with a dispensing nozzle, which optionally dispenses hot water or superheated steam, possibly together with cleaning chemicals, with a water box, which is connected via a suction line to a high-pressure pump for the cleaning liquid, which may also be a pump for the Drives cleaning chemicals, on the pressure side of which a safety circuit is connected, which contains a changeover valve which, when the permissible pressure on the pressure side is exceeded, directs the cleaning fluid to the suction side of the pump, as well as a pressure switch that contains a switch that is electrically connected to the drive of the pump is actuated by a piston pressurized on the pressure side, furthermore a safety valve which is acted upon in the closing direction by the pump pressure and in the opening direction by the pressure prevailing in the circuit, and which contains a water shortage protection device which acts on the in the discharge line from the pump to the nozzle prevails flow, in which a heat exchanger is also provided for heating the cleaning liquid.
  • the invention is therefore based on the object of proposing a high-pressure cleaning device of the type mentioned at the outset which is very reliable and switches off reliably even in the event of the failure of the functioning of one or the other essential safety component of the known safety circuit, without an excessively high excess pressure being generated build up the pressure side of the pump with the dispensing nozzle closed.
  • the invention is characterized in that the safety valve is provided in the safety circuit, the safety valve contains a spring-loaded control piston which is acted against by the force of the spring by the pressure prevailing on the discharge side of the low water protection device and which occurs at its overpressure Displacement opens a check valve that connects the pressure side of the pump with its suction side.
  • the additional safety valve thus serves, as it were, as a final safety measure if the other essential components of the safety circuit or only one of these components should fail.
  • the safety valve absorbs the after-heating that still occurs when the system is switched off, due to the thermal inertia of the heating elements, and at the same time also absorbs the pressure increase that occurs due to the pump's continued running. After-running causes several revolutions of the drive of the pump or the pump itself even after the pump has been switched off, combined with a corresponding pressure increase, which is also absorbed by the safety valve.
  • An important embodiment of the invention is characterized in that a steam valve with an adjustable flow cross section is arranged in the connecting line between the changeover valve and the suction side of the pump and is also connected to the pressure line of the pump.
  • a steam valve with an adjustable flow cross section is arranged in the connecting line between the changeover valve and the suction side of the pump and is also connected to the pressure line of the pump.
  • the invention is explained in more detail below on the basis of an exemplary embodiment from which further important features result.
  • the figure shows a circuit diagram with the essential components of a high-pressure cleaning device according to the invention with optional operation with hot water and steam, optionally also with the addition of cleaning chemicals.
  • Cleaning liquid is available in a water box 1.
  • the cleaning liquid is drawn in from the water tank via a high-pressure pump 2 and a suction line 3.
  • the cleaning fluid then leaves the high pressure pump and kicks in on its pressure side in a safety circuit designated as a whole with item 4, which is otherwise housed in a single safety and control block.
  • Behind the safety circuit 4 the high-pressure water leaves the safety circuit and enters a heat exchanger 5. From there, the water or the superheated steam reaches a high-pressure discharge nozzle 7 via a gun 6.
  • a chemical pump 8 can also be operated by the pump 2, which sucks cleaning chemicals from containers 9 which are switchable, possibly also from the water tank 1. Via a line 10 which opens behind the heat exchanger 5 into a discharge line 11, the Dispensing medium may also be mixed with cleaning chemicals.
  • the water thus enters the safety circuit 4 on the pressure side via a discharge line 12. It opens a non-return valve 13, flows via a line 14 into a low water protection device, which essentially consists of a permanent magnet 15, which is held in a larger through hole via a spring 16.
  • a reed switch 17 is provided outside the through hole.
  • the reed switch 17 switches a solenoid valve for the fuel supply to the heater.
  • an auxiliary bore 18 is provided so that the water can flow through more freely.
  • the water then leaves the block with the safety circuit 4 via a line 19. It then enters the heat exchanger 5.
  • the water shortage protection responds, which essentially consists of the magnet 15 and the reed switch 17. This is based on the fact that the magnet 15 is now pushed back into its starting position by its spring 16. At this moment, the reed switch switches the solenoid valve, which in turn shuts down the burner. So this is how the low water indicator works.
  • the chemical pump 8 also no longer runs because it is driven by the pump 2. The same overpressure as in the rest of the system also exists between the gun 6 and the pump pressure valve for the chemicals.
  • a steam valve 29 which has a rotary knob 30.
  • a bolt 31 connected to the rotary knob releases a check valve 32, which opens immediately under the force of a spring 33 via a needle 34.
  • the needle is designed so that there is a precisely defined annular gap between the needle and the bore of the valve.
  • the device was switched off normally via an automatic shutdown 28.
  • the holding pressure prevails between the closed gun 6 and the check valve 13.
  • the steam level is opened.
  • the device is started up as explained above.
  • the motor starts immediately and pumps water. Since the holding pressure between the open pistol and the check valve 13 does not decrease so quickly and fresh pressurized water is pumped in again by the pump 2, there is a pressure blow between the pump and the check valve 13, which strikes the check valve 32 of the steam stage. When this is closed, it no longer opens because the operating pressure is already there.
  • the piston force of the needle 24 is greater than the force of the spring 33 because of the operating pressure.
  • the pump 2 may only start up and deliver water when the holding pressure between the check valve 13 and the opened gun 6 has reduced, i.e. with a certain delay.
  • the evaporation process is stopped by closing the gun.
  • the device If, after working with the heating (hot water or steam), the device is switched off via the automatic switch-off 28, then the residual heat which is present in the heating coil of the heat exchanger 5 and in the burner acts on the trapped water in the heating coil (between the closed Gun and check valve 13). This residual heat causes further evaporation of water and thus also an impermissible overpressure.
  • the safety valve 35 now also comes into action as described above.
  • the spring 43 of the safety valve 35 is to be set more strongly than the spring 23 of the valve 20. As a rule, it is set such that the safety valve 35 is only switched when the pressure is 20% above the working pressure.
  • the pump 2 is switched off via the changeover valve 20 and the automatic cut-out 27, 28 with the microswitch 28, the pressure in the pump is zero bar (idle), as described above. As a result of this idling, the pump turns a few revolutions until it comes to a standstill. At these idle revolutions, however, the chemical pump 8 continues to pump because it is not connected to the valve 20. It also does not have its own switch valve.
  • a thermal fuse 44 is installed in the line 19 on the input side of the heat exchanger.
  • the thermal fuse is the last link in an emergency chain and only comes into operation when, contrary to expectations, both the low water indicator 15, 17 and the safety valve 35 fail.
  • the safety valve 35 inevitably opens and there is a backflow via line 36. Since the burner does not switch off due to the fault, there is a temperature increase within the heat exchanger 5 and the temperature gradually builds up via line 36 ; When the temperature has reached a temperature point of 108 °, the machine is electrically switched off via the control line 45 via the thermal fuse 44.
  • the machine includes the drive motor of pump 2 and the burner.
  • the thermal fuse 44 then blows and must be replaced by a new thermal fuse to switch the machine on again.
  • the figure also shows that if the metering valve 46 of the chemical pump 8 is opened, it is possible to add chemicals to the outlet side of the heat exchanger via line 50.

Landscapes

  • Cleaning By Liquid Or Steam (AREA)
EP86113964A 1985-08-29 1986-10-08 Hochdruck-Reinigungsgerät Expired - Lifetime EP0263196B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8686113964T DE3673650D1 (de) 1986-10-08 1986-10-08 Hochdruck-reinigungsgeraet.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853530954 DE3530954A1 (de) 1985-08-29 1985-08-29 Hochdruck-reinigungsgeraet

Publications (2)

Publication Number Publication Date
EP0263196A1 EP0263196A1 (de) 1988-04-13
EP0263196B1 true EP0263196B1 (de) 1990-08-22

Family

ID=6279710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113964A Expired - Lifetime EP0263196B1 (de) 1985-08-29 1986-10-08 Hochdruck-Reinigungsgerät

Country Status (3)

Country Link
US (1) US4773592A (enrdf_load_stackoverflow)
EP (1) EP0263196B1 (enrdf_load_stackoverflow)
DE (1) DE3530954A1 (enrdf_load_stackoverflow)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3810341A1 (de) * 1988-03-17 1989-09-28 Suttner Gmbh & Co Kg Fluessigkeitsfoerdereinrichtung, insbesondere hochdruckreinigungseinrichtung
DE3922956A1 (de) * 1989-07-12 1991-01-17 Kaercher Gmbh & Co Alfred Hochdruckreinigungsgeraet
IT226715Z2 (it) * 1992-06-24 1997-07-01 Dassi Francesco Pulitore e disinfestatore per stanze da bagno e servizi igienici
US5385106A (en) * 1992-08-24 1995-01-31 Langshaw; Eric Hot water/steam weed killing system
US5397054A (en) * 1992-08-26 1995-03-14 Dolmar Gmbh Pressure jet cleaning appliance
DE4229730A1 (de) * 1992-09-05 1994-03-10 Bosch Gmbh Robert Elektromagnetisch betätigbares Brennstoffeinspritzventil
DE4310155C1 (de) * 1993-03-29 1994-06-30 Helmut Stoeger Regel- und Steuervorrichtung für eine Flüssigkeits-Druckerhöhungsanlage
DE4323832C2 (de) * 1993-07-16 2002-05-08 Schickert Gmbh Verfahren zur Reinigung von Fahrzeugbremsen
US5529460A (en) * 1993-07-28 1996-06-25 Coleman Powermate, Inc. Pressure washer with flow control switch
DE4331714A1 (de) * 1993-09-17 1995-03-23 Schickert Gmbh Reinigungsgerät zum Reinigen von Fahrzeugbremsen
DE4404925A1 (de) * 1994-02-16 1995-08-17 Kaercher Gmbh & Co Alfred Hochdruckreinigungsgerät
DE19521536C2 (de) * 1995-06-13 2002-06-20 3F Cleaning Systems Gmbh Spritzeinrichtung zur kombinierten Hochdruck/Niederdruck-Reinigung
EP0783923B1 (en) * 1995-12-19 1998-06-17 Kew Industri A/S Method and apparatus for controlling the flow of cleaning liquid through a high-pressure cleaner
DE19757160A1 (de) * 1997-12-20 1999-06-24 Omb Oberdorfer Maschinenfabrik Regelsicherheitsblock für Hochdruckreinigungsgeräte
US6056207A (en) * 1998-04-30 2000-05-02 Sioux Steam Cleaner Corporation Cleaner with temperature control
US20010052355A1 (en) 1999-02-08 2001-12-20 Herb Hoenisch Multi-container pressure washer
DE10218143A1 (de) * 2002-04-23 2003-11-13 Alto Deutschland Gmbh Sicherheitsfernsteuerung für den Betrieb von Hochdruckreinigern
CA2432502C (en) * 2003-06-16 2011-04-19 Robert Lanoie Method and apparatus for safely cleaning a live equipment
EP1491129A1 (de) * 2003-06-26 2004-12-29 WALSER & Co. AG Verfahren und Vorrichtung zum Erzeugen eines Gemisches aus Wasserdampf und Reinigungsmittel
AT504272B1 (de) * 2006-05-29 2008-10-15 Ertl Gmbh Reinigungstechnik Mobiles reinigungsgerät
DE202011005630U1 (de) * 2011-04-27 2014-02-07 Nilfisk-Advance A/S Regelsicherheitsblock für Hochdruck-Reinigungsgeräte mit Schalteinrichtung
WO2013163352A1 (en) * 2012-04-24 2013-10-31 Advanced Wet Technologies Gmbh Hyperbaric cnx for post-wafer-saw integrated clean, de-glue, and dry apparatus & process
US20130291901A1 (en) * 2012-05-06 2013-11-07 Advanced Wet Technologies Gmbh Hyperbaric Methods and Systems for Surface Treatment, Cleaning, and Drying
IT202200023349A1 (it) * 2022-11-11 2024-05-11 Ip Cleaning S R L Macchina per trattare superfici mediante una sostanza pulente

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1774805A (en) * 1926-11-18 1930-09-02 Joseph A Maynard Relief valve for hot-water systems
US2645243A (en) * 1948-05-17 1953-07-14 Lon D Turner Relief valve manifold
US3246845A (en) * 1964-06-11 1966-04-19 L & A Products Inc Controls for high velocity washing equipment
US3383044A (en) * 1965-08-09 1968-05-14 Britt Tech Corp Hydraulically controlled pressure washer
US3477645A (en) * 1967-12-26 1969-11-11 Edwin L Spangler Jr Portable steam-cleaning apparatus
US3797744A (en) * 1972-11-20 1974-03-19 W Smith Portable cleaning and sanitizing system
US3997114A (en) * 1975-04-03 1976-12-14 Kem-O-Kleen, Inc. High pressure spray cleaning apparatus
US4222521A (en) * 1978-03-06 1980-09-16 Gerni A/S Apparatus for cleaning objects by means of a jet of liquid
DE3028746C2 (de) * 1980-07-29 1985-11-28 Guido 7919 Bellenberg Oberdorfer Hochdruck-Reinigungsanlage
DE3047493C2 (de) * 1980-12-17 1985-07-25 Alfred Kärcher GmbH & Co, 7057 Winnenden Hochdruckreinigungsgerät
DE3049515A1 (de) * 1980-12-30 1982-07-29 Motan Gmbh, 7972 Isny Brennerantrieb, insbesondere fuer hochdruckreiniger
DE8122127U1 (de) * 1981-07-28 1981-12-03 Guido Oberdorfer Wap-Maschinen, 7919 Bellenberg Hochdruck-reinigungsgeraet mit umschaltventil
DE3322959A1 (de) * 1983-06-25 1985-01-10 Guido Oberdorfer Wap-Maschinen, 7919 Bellenberg Steuerblock fuer ein heisswasser-hochdruck-reinigungsgeraet

Also Published As

Publication number Publication date
US4773592A (en) 1988-09-27
DE3530954C2 (enrdf_load_stackoverflow) 1989-03-02
DE3530954A1 (de) 1987-03-12
EP0263196A1 (de) 1988-04-13

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