WO2000011412A1 - Cleaning device with a spray unit - Google Patents

Cleaning device with a spray unit Download PDF

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Publication number
WO2000011412A1
WO2000011412A1 PCT/EP1999/005720 EP9905720W WO0011412A1 WO 2000011412 A1 WO2000011412 A1 WO 2000011412A1 EP 9905720 W EP9905720 W EP 9905720W WO 0011412 A1 WO0011412 A1 WO 0011412A1
Authority
WO
WIPO (PCT)
Prior art keywords
cleaning device
housing
shaped housing
cover
chamber
Prior art date
Application number
PCT/EP1999/005720
Other languages
German (de)
French (fr)
Inventor
Klaus Frech
Joachim Keppler
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 EP99942817A priority Critical patent/EP1105688B1/en
Priority to DE59901273T priority patent/DE59901273D1/en
Priority to AT99942817T priority patent/ATE216479T1/en
Publication of WO2000011412A1 publication Critical patent/WO2000011412A1/en

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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
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/284—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs
    • F22B1/285—Methods of steam generation characterised by form of heating method in boilers heated electrically with water in reservoirs the water being fed by a pump to the reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
    • F22B1/288—Instantaneous electrical steam generators built-up from heat-exchange elements arranged within a confined chamber having heat-retaining walls
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • 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
    • B08B2230/00—Other cleaning aspects applicable to all B08B range
    • B08B2230/01—Cleaning with steam
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids

Definitions

  • the invention relates to a cleaning device with a spray device for liquid and / or steam, to which a heatable continuous-flow heater for heating and / or evaporating the liquid to be sprayed is assigned.
  • Such a cleaning device is known for example from DE 195 22 893 AI.
  • a heating hub protruding from a cover is immersed in a liquid container and forms an annular space with the liquid container, which is filled by the liquid.
  • the heating takes place on the outer wall of the heating hub, with the liquid flowing through the annulus in a manner that is difficult to control.
  • the continuous-flow heater comprises a pot-shaped housing, in the outer wall of which heating elements are embedded, the interior of which is divided by a partition into two chambers which are connected to one another at one end of the housing, and that on this one Connection opposite end of the housing in one of the chambers, a liquid inflow enters and from the other chamber, a media outflow emerges.
  • the heating takes place on the wall of the pot-shaped housing.
  • the liquid is in a forced path from the liquid inflow through the first chamber and then through the second chamber to the media outflow, so that very clearly defined flow paths arise through the series-connected chambers.
  • the special arrangement also ensures that the liquid is guided virtually in the countercurrent principle, so that particularly close heat transfer is possible near the media outlet area, in which possibly only a small heat transfer to the vaporous medium is still possible, since in this area the still cold liquid enters. Local overheating of the instantaneous water heater is thus avoided, and this in turn leads to a particularly uniform transfer of the available heat to the liquid.
  • the chamber into which the liquid inflow enters has a smaller cross section than the other chamber from which the media outflow emerges. This takes into account the expansion of the liquid during heating and, in particular, evaporation, which is accompanied by a corresponding increase in volume.
  • the cross section of the chamber with the liquid inflow is approximately half as large as the cross section of the chamber with the media outflow.
  • the interior of the housing has a circular cylindrical shape and the partition is flat.
  • cup-shaped housing is closed by means of a cover which encloses an annular seal between itself and the upper edge of the housing.
  • This cover can be designed as a flat plate.
  • the cover and the cup-shaped housing carry interlocking projections and recesses which are dimensioned such that when the cover is placed on the cup-shaped housing, the projections and recesses are cold welded.
  • the edge of the pot-shaped housing is flanged at least in some areas and thereby surrounds the edge of the cover.
  • the cover is clamped against the upper edge of the partition by a clamping element; in particular, the clamping element can be a clamping screw penetrating the cover and screwed into the partition.
  • the pot-shaped housing is a die-cast part, in particular this can consist of aluminum.
  • liquid inflow and the media outflow are arranged on the underside of the pot-shaped housing.
  • the pot-shaped housing can be arranged in any installation position in the cleaning device.
  • the liquid inflow is then preferably located below the media outflow.
  • the instantaneous water heater described is particularly suitable for heating / evaporating small amounts of liquid, for example the volume of the pot-shaped housing can be between 10 cm 3 and 100 cm 3 .
  • a continuous flow heater can be used in such a way that it only heats the flow rate of liquid, evaporates it completely and thus releases water vapor or reaches any intermediate state, in which wet steam is thus released.
  • Figure 1 is a schematic view of a cleaning device with a water heater
  • Figure 2 is a longitudinal sectional view through a water heater according to Figure 1;
  • Figure 3 is a plan view of the cup-shaped housing of the water heater in the direction of arrow A in Figure 2 and
  • FIG. 4 a view of the cover of the instantaneous water heater of FIG. 2 in the direction of arrow B.
  • FIG. 1 schematically shows a cleaning device 1 with a suction unit 2, which is also only shown schematically, and a suction line 3.
  • This cleaning device can be, for example, a conventional wet and dry vacuum cleaner.
  • the cleaning device 1 comprises, in addition to the suction unit 2 and the suction line 3, a liquid container 4, which is filled with water, for example, and from which a supply line 5 leads to a pump 6, which supplies liquid from the liquid container 4 to the inflow 7 of a continuous-flow heater 8.
  • An outlet 9 emerges from the continuous-flow heater 8 and is connected via a spray line 10 to a spray nozzle 11, which in the representation of Figure 1 is also shown only very schematically.
  • This spray nozzle 11 can, for example, also be arranged at the end of a movable spray lance.
  • the instantaneous water heater 8 comprises a pot-shaped housing
  • the circular cylindrical interior 15 of the housing 12 is divided by a flat partition 17 into an inflow chamber 18 and an outflow chamber 19.
  • the inlet 7 enters the inlet chamber 18, and the outlet 9 also exits the outlet chamber 19 through the bottom 13.
  • the cross section of the inflow chamber 18 is approximately half the cross section of the outflow chamber 19, this is achieved in that the partition 17 in the housing 12 extends eccentrically (Figure 3).
  • the partition does not extend over the entire height of the interior 15 of the housing 12, but ends slightly below the upper edge 20 of the housing 12, so that the inflow chamber 18 and the outflow chamber 19 together in the section of the housing 12 adjoining the upper edge 20 stay in contact.
  • the inner walls of the inflow chamber 18 and the outflow chamber 19 are corrugated by projections 21, which extend over the entire height of the inflow chamber 18 and the outflow chamber 19, and thereby increase in their surface area.
  • the interior 15 is closed on the open end face of the housing 12 opposite the bottom 13 by a cover 22 in the form of a flat, circular plate which is placed on the flat upper edge 20 of the housing 12.
  • a cover 22 in the form of a flat, circular plate which is placed on the flat upper edge 20 of the housing 12.
  • an annular seal 24 is inserted into a circumferential groove 23 which, when the cover 22 is in place, seals it against the upper edge 20 of the housing 12.
  • the cover 22 carries on its underside protruding, lateral profiled pins 25 which dip into corresponding recesses 26 in the upper edge 20 of the housing 12 and are dimensioned such that when the cover 22 is pressed firmly onto the upper edge 20, the materials of the pins 25 and the housing 12 are cold welded.
  • a projection 27 adjoining the flat upper edge 20 on the outside can be deformed radially inward, so that the edge 28 of the cover 22 is flanged, this flanging can extend over the entire circumference or only over parts of the circumference.
  • cover 22 is further fixed by a tensioning screw, not shown in the drawing, which is inserted through an opening 29 in the cover 22 and screwed into an internally threaded bore 30 in the partition 17.
  • the housing 12 is preferably designed as an aluminum die-cast part, and the cover 22 is also made of aluminum, for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Catching Or Destruction (AREA)
  • Nozzles (AREA)

Abstract

A cleaning device (1) with a spray unit for liquid and/or steam, including an instantaneous water heater (8) that can be heated up and used to heat or vaporize the liquid that is to be sprayed. In order to achieve optimum transmission of the heat supply to the through-flowing liquid, the instantaneous water heater has a pot-shaped housing (12) with heating elements (16) embedded in the outer wall (14) thereof and the interior (15) of said housing is divided up into two chambers by means of a separating wall (17), whereby both chambers connect with each other at the end of the housing, and a supply (7) of liquid flows into one of the chambers on the opposite end to said connection and the medium (9) flows out of the other chamber.

Description

REINIGUNGSGERÄT MIT EINER SPRÜHEINRICHTUNG CLEANER WITH A SPRAYER
Die Erfindung betrifft ein Reinigungsgerät mit einer Sprüheinrichtung für Flüssigkeit und/oder Dampf, dem ein beheizbarer Durchlauferhitzer zum Aufheizen und/ oder Verdampfen der zu versprühenden Flüssigkeit zugeordnet ist.The invention relates to a cleaning device with a spray device for liquid and / or steam, to which a heatable continuous-flow heater for heating and / or evaporating the liquid to be sprayed is assigned.
Ein solches Reinigungsgerät ist beispielsweise aus der DE 195 22 893 AI bekannt.Such a cleaning device is known for example from DE 195 22 893 AI.
Bei dieser bekannten Konstruktion wird in einen Flüssigkeitsbehälter eine von einem Deckel abstehende Heiznabe eingetaucht, die mit dem Flüssigkeitsbehälter einen Ringraum ausbildet, der von der Flüssigkeit ausgefüllt wird. Die Aufheizung erfolgt an der Außenwand der Heiznabe, wobei der Ringraum in schwer kontrollierbarer Weise von der Flüssigkeit durchströmt wird.In this known construction, a heating hub protruding from a cover is immersed in a liquid container and forms an annular space with the liquid container, which is filled by the liquid. The heating takes place on the outer wall of the heating hub, with the liquid flowing through the annulus in a manner that is difficult to control.
Es ist Aufgabe der Erfindung, ein gattungsgemäßes Reinigungsgerät so auszubilden, daß eine optimale Übertragung der zugeführten Wärme auf die durchströmende Flüssigkeit erreicht werden kann.It is an object of the invention to design a generic cleaning device so that an optimal transfer of the heat supplied to the flowing fluid can be achieved.
Diese Aufgabe wird bei einem Reinigungsgerät der eingangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß der Durchlauferhitzer ein topfförmiges Gehäuse umfaßt, in dessen Außenwand Heizelemente eingebettet sind, dessen Innenraum durch eine Trennwand in zwei an einem Ende des Gehäuses miteinander in Verbindung stehende Kammern unterteilt ist, und daß an dem dieser Verbindung gegenüberliegenden Ende des Gehäuses in eine der Kammern ein Flüssigkeitszufluß eintritt und aus der anderen Kammer ein Medienabfluß austritt.This object is achieved according to the invention in a cleaning device of the type described in the introduction in that the continuous-flow heater comprises a pot-shaped housing, in the outer wall of which heating elements are embedded, the interior of which is divided by a partition into two chambers which are connected to one another at one end of the housing, and that on this one Connection opposite end of the housing in one of the chambers, a liquid inflow enters and from the other chamber, a media outflow emerges.
Bei einem in dieser Weise ausgebildeten Durchlauferhitzer erfolgt die Aufheizung an der Wand des topfförmigen Gehäuses. Die Flüssigkeit wird dabei auf einem Zwangsweg von dem Flüssigkeitszufluß durch die erste Kammer und anschließend durch die zweite Kammer zu dem Medienabfluß geführt, so daß ganz klar definierte Strömungswege durch die in Reihe geschalteten Kammern erstehen. Die spezielle Anordnung stellt auch sicher, daß die Flüssigkeit quasi im Gegenstromprinzip geführt wird, so daß nahe des Medienaustrittsbereiches, in dem möglicherweise nur noch ein geringer Wärmeübergang an das dampfförmige Medium möglich ist, in dem zufuhrnahen Bereich ein besonders guter Wärmeübergang möglich ist, da in diesen Bereich die noch kalte Flüssigkeit eintritt. Damit werden lokale Überhitzungen des Durchlauferhitzers vermieden, und dies wiederum führt zu einer besonders gleichmäßigen Übertragung der zur Verfügung stehenden Wärme auf die Flüssigkeit.In the case of a flow heater designed in this way, the heating takes place on the wall of the pot-shaped housing. The liquid is in a forced path from the liquid inflow through the first chamber and then through the second chamber to the media outflow, so that very clearly defined flow paths arise through the series-connected chambers. The special arrangement also ensures that the liquid is guided virtually in the countercurrent principle, so that particularly close heat transfer is possible near the media outlet area, in which possibly only a small heat transfer to the vaporous medium is still possible, since in this area the still cold liquid enters. Local overheating of the instantaneous water heater is thus avoided, and this in turn leads to a particularly uniform transfer of the available heat to the liquid.
Gemäß einer besonders bevorzugten Ausführungsform ist vorgesehen, daß die Kammer, in die der Flüssigkeitszufluß eintritt, einen kleineren Querschnitt aufweist als die andere Kammer, aus der der Medienabfluß austritt. Damit wird der Ausdehnung der Flüssigkeit bei der Aufheizung Rechnung getragen und insbesondere einer Verdampfung, die mit entsprechender Volumenerhöhung einhergeht. Beispielsweise kann vorgesehen sein, daß der Querschnitt der Kammer mit dem Flüssigkeitszufluß etwa halb so groß ist wie der Querschnitt der Kammer mit dem Medienabfluß.According to a particularly preferred embodiment it is provided that the chamber into which the liquid inflow enters has a smaller cross section than the other chamber from which the media outflow emerges. This takes into account the expansion of the liquid during heating and, in particular, evaporation, which is accompanied by a corresponding increase in volume. For example, it can be provided that the cross section of the chamber with the liquid inflow is approximately half as large as the cross section of the chamber with the media outflow.
Es ist günstig, wenn der Innenraum des Gehäuses Kreiszylinderform aufweist und die Trennwand eben ausgebildet ist.It is advantageous if the interior of the housing has a circular cylindrical shape and the partition is flat.
Weiterhin kann vorgesehen sein, daß die Innenwände des Gehäuses und/oder die Trennwand zur Oberflächenvergrö- ßerung in die Kammern weisende VorSprünge tragen, insbesondere erstrecken sich diese Vorsprünge im wesentlichen über die gesamte Höhe der Kammern.Provision can furthermore be made for the inner walls of the housing and / or the partition wall to have projections pointing into the chambers for increasing the surface area, in particular these projections extend essentially over the entire height of the chambers.
Bei einem bevorzugten Ausführungsbeispiel ist vorgesehen, daß das topfförmige Gehäuse mittels eines Deckels verschlossen ist, der zwischen sich und dem oberen Rand des Gehäuses eine Ringdichtung einschließt.In a preferred embodiment it is provided that the cup-shaped housing is closed by means of a cover which encloses an annular seal between itself and the upper edge of the housing.
Dieser Deckel kann als ebene Platte ausgebildet sein.This cover can be designed as a flat plate.
Besonders vorteilhaft ist es, wenn der Deckel und das topfförmige Gehäuse ineinandergreifende Vor- und Rücksprünge tragen, die derart bemessen sind, daß beim Aufsetzen des Deckels auf das topfförmige Gehäuse eine Kaltverschweißung der Vor- und Rücksprünge eintritt.It is particularly advantageous if the cover and the cup-shaped housing carry interlocking projections and recesses which are dimensioned such that when the cover is placed on the cup-shaped housing, the projections and recesses are cold welded.
Es ist weiterhin günstig, wenn der Rand des topfförmigen Gehäuses zumindest bereichsweise umgebördelt ist und dadurch den Rand des Deckels umschließt. Weiterhin kann vorgesehen sein, daß der Deckel durch ein Spannelement gegen den oberen Rand der Trennwand gespannt ist, insbesondere kann das Spannelement eine den Deckel durchsetzende, in die Trennwand eingeschraubte Spannschraube sein.It is also advantageous if the edge of the pot-shaped housing is flanged at least in some areas and thereby surrounds the edge of the cover. Furthermore, it can be provided that the cover is clamped against the upper edge of the partition by a clamping element; in particular, the clamping element can be a clamping screw penetrating the cover and screwed into the partition.
Bei einer bevorzugten Ausführungsform ist vorgesehen, daß das topfförmige Gehäuse ein Druckgußteil ist, insbesondere kann dieses aus Aluminium bestehen.In a preferred embodiment it is provided that the pot-shaped housing is a die-cast part, in particular this can consist of aluminum.
Vorteilhaft ist es, wenn der Flüssigkeitszufluß und der Medienabfluß an der Unterseite des topfförmigen Gehäuses angeordnet sind.It is advantageous if the liquid inflow and the media outflow are arranged on the underside of the pot-shaped housing.
Das topfförmige Gehäuse kann in beliebiger Einbaulage in dem Reinigungsgerät angeordnet werden, günstig ist eine Einbaulage, in der der Topf auf der Seite liegt, die Unterseite des Topfes also eine Seitenwand bildet. Vorzugsweise befindet sich dann der Flüssigkeitszufluß unterhalb des Medienabflusses.The pot-shaped housing can be arranged in any installation position in the cleaning device. A position in which the pot lies on its side, in other words the bottom of the pot forms a side wall, is advantageous. The liquid inflow is then preferably located below the media outflow.
Der beschriebene Durchlauferhitzer ist insbesondere geeignet für das Erhitzen/Verdampfen von kleinen Flüssigkeitsmengen, beispielsweise kann das Volumen des topfförmigen Gehäuses zwischen 10 cm3 und 100 cm3 liegen. Je nach Größe der zugeführten Wärmemenge beziehungsweise nach Durchströmungsmenge kann ein solcher Durchlauferhitzer so eingesetzt werden, daß er die durchströmende Flüssigkeitsmenge nur erhitzt, sie vollständig verdampft und damit Wasserdampf abgibt oder aber einen beliebigen Zwischenzustand erreicht, bei dem also Naßdampf abgegeben wird. Die nachfolgende Beschreibung bevorzugter Ausführungs- formen der Erfindung dient im Zusammenhang mit der Zeichnung der näheren Erläuterung. Es zeigen:The instantaneous water heater described is particularly suitable for heating / evaporating small amounts of liquid, for example the volume of the pot-shaped housing can be between 10 cm 3 and 100 cm 3 . Depending on the size of the amount of heat supplied or on the flow rate, such a continuous flow heater can be used in such a way that it only heats the flow rate of liquid, evaporates it completely and thus releases water vapor or reaches any intermediate state, in which wet steam is thus released. The following description of preferred embodiments of the invention serves in conjunction with the drawing for a more detailed explanation. Show it:
Figur 1: eine schematische Ansicht eines Reinigungsgeräts mit einem Durchlauferhitzer;Figure 1 is a schematic view of a cleaning device with a water heater;
Figur 2: eine Längsschnittansicht durch einen Durchlauferhitzer gemäß Figur 1;Figure 2 is a longitudinal sectional view through a water heater according to Figure 1;
Figur 3: eine Draufsicht auf das topfförmige Gehäuse des Durchlauferhitzers in Richtung des Pfeils A in Figur 2 undFigure 3 is a plan view of the cup-shaped housing of the water heater in the direction of arrow A in Figure 2 and
Figur 4: eine Ansicht des Deckels des Durchlauferhitzers der Figur 2 in Richtung des Pfeils B.FIG. 4: a view of the cover of the instantaneous water heater of FIG. 2 in the direction of arrow B.
In Figur 1 ist schematisch ein Reinigungsgerät 1 mit einem ebenfalls nur schematisch wiedergegebenen Saugaggregat 2 und einer Saugleitung 3 dargestellt, dieses Reinigungsgerät kann beispielsweise ein herkömmlicher Naß-Trocken-Sauger sein.FIG. 1 schematically shows a cleaning device 1 with a suction unit 2, which is also only shown schematically, and a suction line 3. This cleaning device can be, for example, a conventional wet and dry vacuum cleaner.
Das Reinigungsgerät 1 umfaßt neben dem Saugaggregat 2 und der Saugleitung 3 einen Flüssigkeitsbehälter 4, der beispielsweise mit Wasser gefüllt ist, und von dem eine Versorgungsleitung 5 zu einer Pumpe 6 führt, welche Flüssigkeit aus dem Flüssigkeitsbehälter 4 dem Zufluß 7 eines Durchlauferhitzers 8 zuführt. Aus dem Durchlauferhitzer 8 tritt ein Auslaß 9 aus, der über eine Sprühleitung 10 mit einer Sprühdüse 11 verbunden ist, die in der Darstellung der Figur 1 ebenfalls nur ganz schematisch wiedergegeben ist. Diese Sprühdüse 11 kann beispielsweise auch am Ende einer bewegbaren Sprühlanze angeordnet sein.The cleaning device 1 comprises, in addition to the suction unit 2 and the suction line 3, a liquid container 4, which is filled with water, for example, and from which a supply line 5 leads to a pump 6, which supplies liquid from the liquid container 4 to the inflow 7 of a continuous-flow heater 8. An outlet 9 emerges from the continuous-flow heater 8 and is connected via a spray line 10 to a spray nozzle 11, which in the representation of Figure 1 is also shown only very schematically. This spray nozzle 11 can, for example, also be arranged at the end of a movable spray lance.
Der Durchlauferhitzer 8 umfaßt ein topfförmiges GehäuseThe instantaneous water heater 8 comprises a pot-shaped housing
12 mit einem geschlossenen Boden 13 und einer im wesentlichen kreiszylindrischen Außenwand 14, in die ein schraubenförmig den Innenraum 15 des Gehäuses 12 umgebendes elektrisches Heizelement 16 eingebettet ist.12 with a closed base 13 and an essentially circular cylindrical outer wall 14, in which an electric heating element 16 is embedded, which helically surrounds the interior 15 of the housing 12.
Der kreiszylindrische Innenraum 15 des Gehäuses 12 wird durch eine ebene Trennwand 17 in eine Zuflußkammer 18 und in eine Abflußkammer 19 unterteilt. Durch den BodenThe circular cylindrical interior 15 of the housing 12 is divided by a flat partition 17 into an inflow chamber 18 and an outflow chamber 19. Through the floor
13 hindurch tritt in die Zuflußkammer 18 der Zufluß 7 ein, ebenfalls durch den Boden 13 hindurch tritt aus der Abflußkammer 19 der Auslaß 9 aus. Der Querschnitt der Zuflußkammer 18 ist etwa halb so groß wie der Querschnitt der Abflußkammer 19, dies wird dadurch erreicht, daß die Trennwand 17 im Gehäuse 12 außermittig verläuft ( Figur 3 ) . Die Trennwand erstreckt sich nicht über die gesamte Höhe des Innenraums 15 des Gehäuses 12, sondern endet geringfügig unterhalb des oberen Rands 20 des Gehäuses 12, so daß in dem an den oberen Rand 20 anschließenden Abschnitt des Gehäuses 12 die Zuflußkammer 18 und die Abflußkammer 19 miteinander in Verbindung stehen.13, the inlet 7 enters the inlet chamber 18, and the outlet 9 also exits the outlet chamber 19 through the bottom 13. The cross section of the inflow chamber 18 is approximately half the cross section of the outflow chamber 19, this is achieved in that the partition 17 in the housing 12 extends eccentrically (Figure 3). The partition does not extend over the entire height of the interior 15 of the housing 12, but ends slightly below the upper edge 20 of the housing 12, so that the inflow chamber 18 and the outflow chamber 19 together in the section of the housing 12 adjoining the upper edge 20 stay in contact.
Die Innenwände der Zuflußkammer 18 und der Abflußkammer 19 sind durch Vorsprünge 21, die sich über die gesamte Höhe der Zuflußkammer 18 und der Abflußkammer 19 erstrecken, gewellt ausgebildet und dadurch in ihrer Oberfläche vergrößert. Der Innenraum 15 ist an der gegenüber dem Boden 13 angeordneten, offenen Stirnseite des Gehäuses 12 durch einen Deckel 22 in Form einer ebenen, kreisförmigen Platte verschlossen, der auf den ebenen oberen Rand 20 des Gehäuses 12 aufgelegt ist. Im oberen Rand 20 ist in eine Umfangsnut 23 eine Ringdichtung 24 eingelegt, die bei aufgesetztem Deckel 22 diesen gegenüber dem oberen Rand 20 des Gehäuses 12 abdichtet.The inner walls of the inflow chamber 18 and the outflow chamber 19 are corrugated by projections 21, which extend over the entire height of the inflow chamber 18 and the outflow chamber 19, and thereby increase in their surface area. The interior 15 is closed on the open end face of the housing 12 opposite the bottom 13 by a cover 22 in the form of a flat, circular plate which is placed on the flat upper edge 20 of the housing 12. In the upper edge 20, an annular seal 24 is inserted into a circumferential groove 23 which, when the cover 22 is in place, seals it against the upper edge 20 of the housing 12.
Der Deckel 22 trägt an seiner Unterseite vorstehende, seitliche profilierte Zapfen 25, die in entsprechende Ausnehmungen 26 im oberen Rand 20 des Gehäuses 12 eintauchen und dabei so bemessen sind, daß beim kräftigen Aufdrücken des Deckels 22 auf den oberen Rand 20 die Materialien der Zapfen 25 und des Gehäuses 12 kaltverschweißt werden. Zur zusätzlichen Sicherung kann ein sich an den ebenen oberen Rand 20 außenseitig anschließender Überstand 27 radial nach innen verformt werden, so daß die Kante 28 des Deckels 22 umgebördelt wird, diese Umbördelung kann sich über den gesamten Umfang oder nur über Teile des Umfangs erstrecken.The cover 22 carries on its underside protruding, lateral profiled pins 25 which dip into corresponding recesses 26 in the upper edge 20 of the housing 12 and are dimensioned such that when the cover 22 is pressed firmly onto the upper edge 20, the materials of the pins 25 and the housing 12 are cold welded. For additional security, a projection 27 adjoining the flat upper edge 20 on the outside can be deformed radially inward, so that the edge 28 of the cover 22 is flanged, this flanging can extend over the entire circumference or only over parts of the circumference.
Schließlich erfolgt eine weitere Festlegung des Deckels 22 durch eine in der Zeichnung nicht dargestellte Spannschraube, die durch eine Öffnung 29 des Deckels 22 hindurchgesteckt und in eine Innengewindebohrung 30 der Trennwand 17 eingeschraubt wird.Finally, the cover 22 is further fixed by a tensioning screw, not shown in the drawing, which is inserted through an opening 29 in the cover 22 and screwed into an internally threaded bore 30 in the partition 17.
Das Gehäuse 12 wird vorzugsweise als Aluminium-Druckgußteil ausgebildet, auch der Deckel 22 besteht beispielsweise aus Aluminium. The housing 12 is preferably designed as an aluminum die-cast part, and the cover 22 is also made of aluminum, for example.

Claims

P A T E N T A N S P R Ü C H E P A T E N T A N S P R Ü C H E
Reinigungsgerät ( 1 ) mit einer Sprüheinrichtung für Flüssigkeit und/oder Dampf, dem ein beheizbarer Durchlauferhitzer (8) zum Aufheizen und/oder Verdampfen der zu versprühenden Flüssigkeit zugeordnet ist, dadurch gekennzeichnet, daß der Durchlauferhitzer ( 8 ) ein topfförmiges Gehäuse (12) umfaßt, in dessen Außenwand (14) Heizelemente (16) eingebettet sind, dessen Innenraum (15) durch eine Trennwand (14) in zwei an einem Ende des Gehäuses (12) miteinander in Verbindung stehende Kammern (18, 19) unterteilt ist, und daß an dem dieser Verbindung gegenüberliegenden Ende des Gehäuses (12) in eine der Kammern (18) ein Flüssigkeitszufluß ( 7 ) eintritt und aus der anderen Kammer (19) ein Medienabfluß (9) austritt.Cleaning device (1) with a spray device for liquid and / or steam, to which a heatable flow heater (8) for heating and / or evaporating the liquid to be sprayed is assigned, characterized in that the flow heater (8) comprises a pot-shaped housing (12) , in the outer wall (14) of which heating elements (16) are embedded, the interior (15) of which is divided by a partition (14) into two chambers (18, 19) communicating with one another at one end of the housing (12), and that at the end of the housing (12) opposite this connection, a liquid inflow (7) enters one of the chambers (18) and a media outflow (9) emerges from the other chamber (19).
2. Reinigungsgerät nach Anspruch 1, dadurch gekennzeichnet, daß die Kammer (18), in die der Flüssigkeitszufluß (7) eintritt, einen kleineren Querschnitt aufweist als die Kammer (19), aus der der Medienabfluß (9) austritt. 2. Cleaning device according to claim 1, characterized in that the chamber (18) into which the liquid inflow (7) enters has a smaller cross-section than the chamber (19) from which the media outflow (9) exits.
3. Reinigungsgerät nach Anspruch 2 , dadurch gekennzeichnet, daß der Querschnitt der Kammer (18) mit dem Flüssigkeitszufluß ( 7 ) etwa halb so groß ist wie der Querschnitt der Kammer (19) mit dem Medienabfluß (9).3. Cleaning device according to claim 2, characterized in that the cross section of the chamber (18) with the liquid inflow (7) is approximately half as large as the cross section of the chamber (19) with the media outflow (9).
4. Reinigungsgerät nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß der Innenraum (15) des Gehäuses (12) Kreiszylinderform aufweist und die Trennwand ( 14 ) eben ausgebildet ist.4. Cleaning device according to one of the preceding claims, characterized in that the interior (15) of the housing (12) has a circular cylindrical shape and the partition (14) is flat.
Reinigungsgerät nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Innenwände des Gehäuses ( 12 ) und/oder die Trennwand (14) zur Oberflächenvergrößerung in die Kammern (18, 19) weisende Vorsprünge (21) tragen.Cleaning device according to one of the preceding claims, characterized in that the inner walls of the housing (12) and / or the partition (14) carry projections (21) pointing into the chambers (18, 19) for increasing the surface area.
6. Reinigungsgerät nach Anspruch 5, dadurch gekennzeichnet, daß die Vorsprünge (21) sich im wesentlichen über die gesamte Höhe der Kammern (18, 19) erstrecken.6. Cleaning device according to claim 5, characterized in that the projections (21) extend substantially over the entire height of the chambers (18, 19).
Reinigungsgerät nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das topfförmige Gehäuse (12) mittels eines Deckels (22) verschlossen ist, der zwischen sich und dem oberen Rand (20) des Gehäuses (12) eine Ringdichtung (24) einschließt. Cleaning device according to one of the preceding claims, characterized in that the pot-shaped housing (12) is closed by means of a cover (22) which encloses an annular seal (24) between itself and the upper edge (20) of the housing (12).
8. Reinigungsgerät nach Anspruch 7, dadurch gekennzeichnet, daß der Deckel (22) als ebene Platte ausgebildet ist.8. Cleaning device according to claim 7, characterized in that the cover (22) is designed as a flat plate.
9. Reinigungsgerät nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß der Deckel (22) und das topfförmige Gehäuse (12) ineinandergreifende Vor- und Rücksprünge (25; 26) tragen, die derart bemessen sind, daß beim Aufsetzen des Deckels (22) auf das topfförmige Gehäuse ( 12 ) eine Kaltverschweißung der Vor- und Rücksprünge (25; 26) eintritt.9. Cleaning device according to claim 7 or 8, characterized in that the cover (22) and the pot-shaped housing (12) carry interlocking projections and recesses (25; 26) which are dimensioned such that when the cover (22) is put on cold welding of the projections and recesses (25; 26) occurs on the pot-shaped housing (12).
10. Reinigungsgerät nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, daß der Rand (27) des topfförmigen Gehäuses (12) zumindest bereichsweise umgebördelt ist und dadurch den Rand (28) des Deckels (22) umschließt.10. Cleaning device according to one of claims 7 to 9, characterized in that the edge (27) of the cup-shaped housing (12) is flanged at least in regions and thereby surrounds the edge (28) of the cover (22).
11. Reinigungsgerät nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, daß der Deckel (22) durch ein Spannelement gegen den oberen Rand der Trennwand (14) gespannt ist.11. Cleaning device according to one of claims 7 to 10, characterized in that the cover (22) is tensioned by a clamping element against the upper edge of the partition (14).
12. Reinigungsgerät nach Anspruch 11, dadurch gekennzeichnet, daß das Spannelement eine den Deckel (22) durchsetzende, in die Trennwand (14) eingeschraubte Spannschraube ist. 12. Cleaning device according to claim 11, characterized in that the clamping element is a through the cover (22), in the partition (14) screwed clamping screw.
13. Reinigungsgerät nach einen der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das topfförmige Gehäuse (12) ein Druckgußteil ist.13. Cleaning device according to one of the preceding claims, characterized in that the cup-shaped housing (12) is a die-cast part.
14. Reinigungsgerät nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das topfförmige Gehäuse (12) aus Aluminium besteht.14. Cleaning device according to one of the preceding claims, characterized in that the cup-shaped housing (12) consists of aluminum.
15. Reinigungsgerät nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß der Flüssigkeitszufluß ( 7 ) und der Medienabfluß ( 9 ) an der Unterseite des topfförmigen Gehäuses ( 12 ) angeordnet sind.15. Cleaning device according to one of the preceding claims, characterized in that the liquid inflow (7) and the media outflow (9) are arranged on the underside of the pot-shaped housing (12).
16. Reinigungsgerät nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das Innenvolumen des topfförmigen Gehäuses (12) zwischen 10 cm3 und 100 cm3 liegt.16. Cleaning device according to one of the preceding claims, characterized in that the inner volume of the cup-shaped housing (12) is between 10 cm 3 and 100 cm 3 .
17. Reinigungsgerät nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß das topfförmige Gehäuse in Seitenlage eingebaut ist.17. Cleaning device according to one of the preceding claims, characterized in that the cup-shaped housing is installed in a lateral position.
18. Reinigungsgerät nach Anspruch 17, dadurch gekennzeichnet, daß der Flüssigkeitszufluß (7) unterhalb des Medienabflusses ( 9 ) angeordnet ist. 18. Cleaning device according to claim 17, characterized in that the liquid inflow (7) is arranged below the media outflow (9).
PCT/EP1999/005720 1998-08-17 1999-08-07 Cleaning device with a spray unit WO2000011412A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP99942817A EP1105688B1 (en) 1998-08-17 1999-08-07 Cleaning device with a spray unit
DE59901273T DE59901273D1 (en) 1998-08-17 1999-08-07 CLEANER WITH A SPRAYER
AT99942817T ATE216479T1 (en) 1998-08-17 1999-08-07 CLEANING DEVICE WITH A SPRAY DEVICE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29814690.8 1998-08-17
DE29814690U DE29814690U1 (en) 1998-08-17 1998-08-17 Cleaning device with a spray device

Publications (1)

Publication Number Publication Date
WO2000011412A1 true WO2000011412A1 (en) 2000-03-02

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ID=8061353

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/005720 WO2000011412A1 (en) 1998-08-17 1999-08-07 Cleaning device with a spray unit

Country Status (4)

Country Link
EP (1) EP1105688B1 (en)
AT (1) ATE216479T1 (en)
DE (2) DE29814690U1 (en)
WO (1) WO2000011412A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7856170B2 (en) 2005-03-15 2010-12-21 Rational Ag Device for producing steam and cooking appliance
CN104048397A (en) * 2013-03-15 2014-09-17 范志立 Instant heater
JP2015525671A (en) * 2012-07-12 2015-09-07 エコドロップ A cordless washer that uses electrical energy to generate heat
EP3023046A1 (en) * 2014-11-20 2016-05-25 Black & Decker Inc. Steam cleaning apparatus
US9404649B2 (en) 2010-10-15 2016-08-02 Strix Limited Electric steam generation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITAN20030003A1 (en) * 2003-01-03 2004-07-04 Know How Spa METHOD FOR THE PRODUCTION OF BOILERS FOR PRODUCTION

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US3247359A (en) * 1960-02-10 1966-04-19 Siemens Elektrogeraete Gmbh Electric instantaneous water heater
EP0299343A1 (en) * 1987-07-07 1989-01-18 I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini Heating element for household electrical appliances
DE4024559A1 (en) * 1990-08-02 1992-02-06 Miele & Cie Electric throughflow heater for dishwasher or washing machine - has two separate throughflow channels in series within hollow cylinder surrounded by heating winding
DE19522893A1 (en) * 1994-06-24 1996-02-08 Vetrella Spa Multifunctional cleaner for domestic use
DE4443798C1 (en) * 1994-12-08 1996-03-21 Kaercher Gmbh & Co Alfred Steam cleaning device for domestic use

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247359A (en) * 1960-02-10 1966-04-19 Siemens Elektrogeraete Gmbh Electric instantaneous water heater
EP0299343A1 (en) * 1987-07-07 1989-01-18 I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini Heating element for household electrical appliances
DE4024559A1 (en) * 1990-08-02 1992-02-06 Miele & Cie Electric throughflow heater for dishwasher or washing machine - has two separate throughflow channels in series within hollow cylinder surrounded by heating winding
DE19522893A1 (en) * 1994-06-24 1996-02-08 Vetrella Spa Multifunctional cleaner for domestic use
DE4443798C1 (en) * 1994-12-08 1996-03-21 Kaercher Gmbh & Co Alfred Steam cleaning device for domestic use

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7856170B2 (en) 2005-03-15 2010-12-21 Rational Ag Device for producing steam and cooking appliance
US9404649B2 (en) 2010-10-15 2016-08-02 Strix Limited Electric steam generation
JP2015525671A (en) * 2012-07-12 2015-09-07 エコドロップ A cordless washer that uses electrical energy to generate heat
US9808837B2 (en) 2012-07-12 2017-11-07 Ecodrop Wireless cleaning apparatus using electrical energy to produce calories
CN104048397A (en) * 2013-03-15 2014-09-17 范志立 Instant heater
EP3023046A1 (en) * 2014-11-20 2016-05-25 Black & Decker Inc. Steam cleaning apparatus

Also Published As

Publication number Publication date
EP1105688A1 (en) 2001-06-13
DE29814690U1 (en) 1998-12-03
DE59901273D1 (en) 2002-05-23
EP1105688B1 (en) 2002-04-17
ATE216479T1 (en) 2002-05-15

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