EP0593521A1 - Mobile floor cleaning machine. - Google Patents

Mobile floor cleaning machine.

Info

Publication number
EP0593521A1
EP0593521A1 EP92912779A EP92912779A EP0593521A1 EP 0593521 A1 EP0593521 A1 EP 0593521A1 EP 92912779 A EP92912779 A EP 92912779A EP 92912779 A EP92912779 A EP 92912779A EP 0593521 A1 EP0593521 A1 EP 0593521A1
Authority
EP
European Patent Office
Prior art keywords
fresh
liquid compartment
dirty
cleaning machine
compartment
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.)
Granted
Application number
EP92912779A
Other languages
German (de)
French (fr)
Other versions
EP0593521B1 (en
Inventor
Franz Kresse
Rainer Osberghaus
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.)
Henkel AG and Co KGaA
Original Assignee
Henkel AG and Co KGaA
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 Henkel AG and Co KGaA filed Critical Henkel AG and Co KGaA
Publication of EP0593521A1 publication Critical patent/EP0593521A1/en
Application granted granted Critical
Publication of EP0593521B1 publication Critical patent/EP0593521B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4027—Filtering or separating contaminants or debris
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/28—Floor-scrubbing machines, motor-driven
    • A47L11/282—Floor-scrubbing machines, motor-driven having rotary tools
    • A47L11/283—Floor-scrubbing machines, motor-driven having rotary tools the tools being disc brushes
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
    • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
    • A47L11/4013—Contaminants collecting devices, i.e. hoppers, tanks or the like
    • A47L11/4016—Contaminants collecting devices, i.e. hoppers, tanks or the like specially adapted for collecting fluids
    • A47L11/4019—Fill level sensors; Security means to prevent overflow, e.g. float valves

Definitions

  • the invention relates to a mobile floor cleaning machine with integrated fresh and dirty liquid compartments, with a cleaning rotor to be supplied from the fresh liquid compartment and with at least one suction nozzle conveying into the dirty liquid compartment Partition are separated.
  • Such a mobile floor cleaning machine is known from DE-OS 37 08 087 by the applicant.
  • cleaning liquid mixed with cleaning concentrate is sprayed onto the floor to be treated via a rotor from a separate fresh liquid compartment.
  • the rotor is used to scrub.
  • a beam-like water suction nozzle following the rotor when the machine is pushed forward serves to soak up the dirty water still remaining after scrubbing, so that the floor can be scrubbed thoroughly in one operation and, at the same time, wiped dry, that is, vacuumed off.
  • the known automatic cleaning machine has its own drive with its own energy supply, ie with a co-fired battery, so that it can be operated independently of mains connections.
  • the radius of action of the known automatic cleaning machine is limited by the size of the fresh liquid compartment.
  • this solution is unsatisfactory, since the intermediate wall designed as a filter clogs up very quickly due to the dirt particles, so that not enough dirt fluid passes through the filter into the fresh fluid compartment.
  • the object of the invention is therefore to improve the cleaning machines mentioned at the outset so that they are environmentally compatible Liche way has a significantly increased radius of action.
  • Fresh and dirty liquid compartment an overflow pipe penetrating the intermediate wall is arranged, the inlet opening of which is arranged above the bottom surface in the dirty liquid compartment and the outlet opening of which is arranged in the region of the bottom surface of the fresh liquid compartment.
  • the dirty water returned to the dirty liquid compartment initially sediments there, i.e. the solid dirt particles settle on the bottom surface of the dirty liquid compartment, while the dirty water, which is not contaminated with dirt particles, enters the fresh liquid compartment through the overflow inlet opening arranged at a sufficient height, if the corresponding fill levels both compartments are available.
  • the liquid flow from the dirt into the fresh liquid compartment depends only on the two fill levels, but not on the pressure prevailing in the container, since on The pressure equalization opening in both compartments has the same pressure. Almost no water is lost during the cleaning process, so that the floor cleaning machine has a very large operating radius.
  • the partition plate is arranged approximately diagonally in the dirty liquid compartment and / or if the partition plate has a rough surface. The measures taken back through these measures
  • a filter is arranged at the fresh liquid outlet of the fresh liquid compartment. This has the advantage that any dirt particles that are in the
  • the filter is designed as a filter cylinder with an exchangeable filter sock arranged thereon.
  • This filter cylinder has openings in the jacket which are covered by the filter sock.
  • the filter is arranged so that it is always below the liquid surface. Due to the movement of the cleaning machine and the associated movement of the water in the fresh liquid compartment, the filter cylinder is flushed again and again by the sloshing movement of the water, so that a blockage is largely avoided.
  • a vacuum monitor is arranged between the filter and the pump connected to the fresh liquid outlet line. Then occurs due to the blockage of the filter with no or too little liquid through the filter, a corresponding negative pressure is set up behind the filter, which is sensed by the negative pressure monitor. This vacuum monitor is then connected to a corresponding display (optically and / or acoustically) so that the operating personnel can change or clean the filter stocking accordingly.
  • FIG. 1 is a perspective view of a mobile floor cleaning machine according to the invention
  • Fig. 2 also partially in perspective a liquid container of the floor cleaning machine with fresh and dirty liquid compartment and
  • FIG. 3 in a simplified representation of a filter for the
  • the mobile floor cleaning machine shown in FIG. 1 has a carriage, generally designated 1, with castors 2 and a handlebar 3 with an operating device (not shown).
  • a large part of the interior of the carriage 1 is occupied by a liquid tank, generally designated 4, which can be closed with a cover 5.
  • the liquid tank 4 consists of a fresh water compartment 6 and a dirty water compartment 7, the two compartments being separated from one another by a fixed partition 8.
  • a cleaning rotor 9 On the underside of the carriage 1, a cleaning rotor 9 is shown, which can be driven by an invisible drive.
  • a plurality of suction nozzles 10 are provided, which are arranged on a suction bar 11.
  • a suction hose 12 with a connector 13 is connected to the suction bar 11 and opens into the dirty liquid compartment 7 of the liquid tank 4.
  • a pressure equalization opening 14 is provided in the intermediate wall 8 between the fresh and dirty liquid compartment 6, 7 in the upper region of the tank 4 (FIG. 2), which, when the naturally aspirated engine is not shown, is switched on Suction of the dirty water through the suction nozzles 10 ensures a uniform vacuum in the liquid tank 4.
  • the dirty liquid compartment 7 is divided into two areas by a diagonally arranged partition plate 15.
  • the partition plate 15 is only indicated to the remaining parts still recognizable in the tank.
  • the dirty water inlet opening (connection 13) is arranged, so that the dirty water first enters the upper area 16. 2, a float 17 and a filter screen 18 are also shown in the upper region 16 of the dirty liquid compartment 7.
  • the inlet opening 20 is in the
  • Dirty liquid compartment 7 is arranged above the bottom surface thereof, but below the diagonal partition plate 15 in the lower region 22 of the dirty liquid compartment 7.
  • the outlet opening 21, on the other hand, is arranged in the region of the bottom surface of the fresh liquid compartment 6.
  • a floating suction funnel 24 is arranged in the fresh liquid compartment 6 in the fresh liquid compartment 6 .
  • This suction funnel 24 is provided with a filter which is designed as a filter cylinder 25.
  • This filter cylinder 25 has a closed lid and bottom, but in the latter there is an outlet spout 26.
  • the jacket 27 of the Filterzy Linders 25 is heavily perforated, which is not shown in the drawing.
  • a filtering stocking 28 is drawn over the cylinder 25, which is preferably made of synthetic fabric with an appropriate mesh size (30 to 1000 ⁇ m).
  • a vacuum monitor 30 is connected via a T-piece, which is also only in principle in FIG. 3 is shown.
  • the liquid tank 4 When the automatic cleaning machine is started up, the liquid tank 4 is completely filled, ie both liquid compartments 6, 7. In the example, the tank 4 has a volume of approximately 60 l. If the naturally aspirated engine (not shown) is put into operation, a uniform negative pressure builds up in both liquid compartments 6, 7 due to the pressure compensation opening 14. The dirty water returned through the suction nozzles 10 reaches the upper area 16 of the dirty liquid compartment 6 through the suction hose 12 and the nozzle 13 or dirty water inlet 6. The dirty liquor is now initially in the upper area 16 and does not yet come into contact with the one below the separating plate 15 located liquid, so that no mixing with this partially clarified solution takes place. The one in Solid dirt contained in dirty water can settle on the surface of the separating plate 15, which is preferably ribbed.
  • the liquor must pass through in order to reach the other area 22 of the dirty liquid compartment 6.
  • a sedimentation process takes place, i.e. the solid dirt particles settle on the bottom of the liquid compartment 6.
  • the partially clarified liquid which is no longer loaded with solids, passes through the inlet opening 20 of the overflow pipe 19, which is located approximately at the 40 1 mark.
  • this liquid enters the fresh water compartment 6 in the bottom area thereof so that the pre-clarified liquor from the dirty water compartment 7 is directed opposite to the filter cylinder 25 to the bottom of the fresh water compartment 6.
  • the pre-clarified liquor which has entered the fresh liquid compartment 6 is discharged by the drain pump 29 through the filter cylinder 25 sucked in and pumped via the cleaning rotor 9 onto the cleaning surface.
  • the filter cylinder 25 is arranged so that it is constantly washed around in the liquid compartment 6. Due to the slight sloshing movements while driving, the filtering stocking 28 is flushed out again and again so that it does not clog up so quickly.

Abstract

An improved mobile cleaning apparatus is provided having an increased cleaning radius consisting of a movable carriage with integrated fresh and soiled liquid compartments contained therein which are separated by a fixed partition, a cleaning rotor is connected to the fresh liquid compartment at one end of the housing and at least one suction nozzle feeding into the soiled liquid compartment is also provided adjacent to the rotor. A pressure equalizing opening is provided in the upper part of the fixed partition. The fixed partition is also adapted to allow an overflow pipe to pass therethrough having an inlet opening situated in the soiled liquid compartment, and an outlet opening situated in the fresh liquid compartment.

Description

"Fahrbarer Bodenrein igunqsautomat"  "Mobile floor cleaning machine"
Die Erfindung betrifft einen fahrbaren Bodenreinigungsautomaten mit integrierten Frisch- und Schmutzflüssigkeitsabteiien, mit einem aus dem Frischflüssigkeitsabteil zu versorgenden Reinigungsrotor sowie mit mindestens einer in das Scnmutzflüssigkeitsabteil fördernden Saugdüse, wobei das Frisch- und Schmutzflüssigkeitsabteil durch eine feste, einen Flüssigkeitsdurchtritt vom Schmutz- in das Frischflüssigkeitsabteil ermöglichende Zwischenwand voneinander getrennt sind. The invention relates to a mobile floor cleaning machine with integrated fresh and dirty liquid compartments, with a cleaning rotor to be supplied from the fresh liquid compartment and with at least one suction nozzle conveying into the dirty liquid compartment Partition are separated.
Ein solcher fahrbarer Bodenreinigungsautomat ist aus der DE-OS 37 08 087 der Anmelderin bekannt. Bei diesem Bodenreinigungsautomaten wird aus einem gesonderten Frischflüssigkeitsabteil mit Reinigungskonzentrat versetzte Reinigungsflüssigkeit über den Rotor auf den zu behandelnden Fußboden aufgespritzt. Zugleich wird mit Hilfe des Rotors gescheuert. Eine beim Vorwärtsschieben des Automaten dem Rotor nachfolgende balkenartige Wassersaugdüse dient dazu, das nach dem Scheuern noch verbleibende Schmutzwasser wieder aufzusaugen, so daß der Boden in einem Arbeitsgang gründlich gescheuert und gleichzeitig gewissermaßen trockengewischt, d.h. abgesaugt werden kann. Der bekannte Reinigungsautomat besitzt einen eigenen Antrieb mit eigener Energιeversorgung, d.h. mit einer mitgefünrten Batterie, so daß er unabhängig von Netzanschlüssen betrieben werαen Kann. Der Aktionsradius des bekannten Reinigungsautomaten ist jedoch durch die Größe des Frischflüssigkeitsabteils begrenzt. Zwar ist nach der bekannten Lösung auch vorgesehen, die Zwischenwand zwischen dem Frischund Schmutzflüssigkeitsabteil aus Filtermaterial auszubilden, so daß die rückgesaugte Scnrautzflüssigkeit durch die Zwiscnenwand in das Frischflüssigkeitsabteil treten kann, wodurch das Frischflüssigkeitsabteil ständig neu befüllt wird. In der Praxis hat sich jedoch herausgestellt, daß diese Lösung nicht zufriedenstellend ist, da die als Filter ausgebildete Zwiscnenwand aufgrund der Schmutzpartikel sehr schnell verstopft, so daß nicht ausreichend viel Schmutzflüssigkeit durcn den Filter in das Frischflüssigkeitsabteil gelangt. Such a mobile floor cleaning machine is known from DE-OS 37 08 087 by the applicant. In this floor cleaning machine, cleaning liquid mixed with cleaning concentrate is sprayed onto the floor to be treated via a rotor from a separate fresh liquid compartment. At the same time, the rotor is used to scrub. A beam-like water suction nozzle following the rotor when the machine is pushed forward serves to soak up the dirty water still remaining after scrubbing, so that the floor can be scrubbed thoroughly in one operation and, at the same time, wiped dry, that is, vacuumed off. The known automatic cleaning machine has its own drive with its own energy supply, ie with a co-fired battery, so that it can be operated independently of mains connections. However, the radius of action of the known automatic cleaning machine is limited by the size of the fresh liquid compartment. According to the known solution, provision is also made for the intermediate wall between the fresh and dirty liquid compartment to be made of filter material, so that the re-sucked clean liquid can pass through the intermediate wall into the fresh liquid compartment, as a result of which the fresh liquid compartment is constantly refilled. In practice, however, it has been found that this solution is unsatisfactory, since the intermediate wall designed as a filter clogs up very quickly due to the dirt particles, so that not enough dirt fluid passes through the filter into the fresh fluid compartment.
Es ist auch bekannt, das rückgesaugte Schmutzwasser im Reinigungsautomaten selbst chemisch zu reinigen. Diese Lösung ist jedoch nicht befriedigend, da dadurch die Umwelt zusätzlich belastet wird und außerdem auch die noch wirksame Reinigungsflotte neutralisiert werden kann, was ebenfalls unerwünscht ist. It is also known to chemically clean the sucked-back dirty water in the cleaning machine itself. However, this solution is unsatisfactory since it places an additional burden on the environment and, moreover, the still effective cleaning liquor can be neutralized, which is also undesirable.
Aufgabe der Erfindung ist daher den eingangs genannten Reinigungsautomaten so zu verbessern, daß er auf umweltverträg liche Weise einen wesentlich erhöhten Aktionsradius aufweist. The object of the invention is therefore to improve the cleaning machines mentioned at the outset so that they are environmentally compatible Liche way has a significantly increased radius of action.
Diese Aufgabe wird mit einem fahrbaren Bodenreinigungsautomaten der eingangs bezeichneten Art erfindungsgemäß dadurch gelöst, daß im oberen Bereich der Zwischenwand eine Druckausgleichsöffnung vorgesehen ist, und daß zwischen dem This object is achieved with a mobile floor cleaning machine of the type mentioned in the invention in that a pressure equalization opening is provided in the upper region of the intermediate wall, and in that between the
Frisch- und Schmutzflüssigkeitsabteil ein die Zwischenwand durchdringendes uberlaufrohr angeordnet ist, dessen Eintrittsöffnung oberhalb der Bodenfläche im Schmutzflüssigkeitsabteil und dessen Austrittsöffnung im Bereich der Bodenfläche des Frischflüssigkeitsabteils angeordnet ist. Fresh and dirty liquid compartment an overflow pipe penetrating the intermediate wall is arranged, the inlet opening of which is arranged above the bottom surface in the dirty liquid compartment and the outlet opening of which is arranged in the region of the bottom surface of the fresh liquid compartment.
Mit dieser Ausbildung ist es auf einfache Weise möglich, ohne den Einsatz von umweltunverträglichen Chemikalien den Aktionsradius eines derartiαen Bodenreinigungsautomaten deutlich zu verbessern. Das in das Schmutzflüssigkeitsabteil rückgeführte Schmutzwasser sedimentiert dort zunächst, d.h. die festen Schmutzpartikel setzen sich an der Bodenfläche des Schmutzflüssigkeitsabteils ab, während das zwar trübe, aber nicht mit Schmutzpartikeln beladene Schmutzwasser durch die in ausreichender Höhe angeordnete überlaufeintrittsöffnung in das Frischflüssigkeitsabteil eintritt, wenn entsprechende Füllstände der beiden Abteile vorliegen. Dabei ist der Flüssigkeitsfluß vom Schmutz- ins Frischflüssigkeitsabteil nur von den beiden Füllständen abhängig, nicht jedoch vom im Behälter herrschenden Druck, da auf cjrund αer Druckausgleichsöffnung in beiden Abteilen derselbe Druck herrscht. Beim Reinigungsvorgang geht somit fast kein Wasser verloren, so daß der Bodenreinigungsautomat einen ausgesprochen großen Aktionsradius aufweist. With this training, it is possible in a simple manner to significantly improve the radius of action of such an automatic floor cleaning machine without the use of environmentally incompatible chemicals. The dirty water returned to the dirty liquid compartment initially sediments there, i.e. the solid dirt particles settle on the bottom surface of the dirty liquid compartment, while the dirty water, which is not contaminated with dirt particles, enters the fresh liquid compartment through the overflow inlet opening arranged at a sufficient height, if the corresponding fill levels both compartments are available. The liquid flow from the dirt into the fresh liquid compartment depends only on the two fill levels, but not on the pressure prevailing in the container, since on The pressure equalization opening in both compartments has the same pressure. Almost no water is lost during the cleaning process, so that the floor cleaning machine has a very large operating radius.
In vorteilhafter Ausgestaltung der Erfindung ist vorgesehen, daß im Scnmutzflüssigkeitsabteil eine zwei Bereiche trennenαe Trennplatte angeordnet sind, wobei im einen Bereich die Schmutzwassereintrittsöffnung und im anderen Bereich die Überlaufeintrittsöffnung angeordnet ist. Durch diese Ausbildung wird erreicht, daß das rückgesaugte In an advantageous embodiment of the invention, it is provided that in the dirt-liquid compartment a two areas separate a separating plate are arranged, the dirty water inlet opening being arranged in one area and the overflow inlet opening being arranged in the other area. This training ensures that the sucked back
Schmutzwasser sehr langsam in den Bereich der Überlaufeintrittsöffnung gelangt, da es zunächst vom einen Bereich über die Trennplatte in den anderen Bereich fließen muß. Die Schmutzpartikel haben dadurch ausreichend lange Zeit, sich abzusetzen, so daß eine gute Klärung stattfindet und keine Schmutzpartikel in das Frischflüssigkeitsabteil geführt werden.  Dirty water reaches the area of the overflow inlet opening very slowly, since it first has to flow from one area via the separating plate to the other area. As a result, the dirt particles have a sufficient time to settle, so that a good clarification takes place and no dirt particles are led into the fresh liquid compartment.
Dabei ist es besonders zweckmäßig, wenn die Trennplatte etwa diagonal im Schmutzflüssigkeitsabteil angeordnet ist und/oder wenn die Trennplatte eine rauhe Oberfläche aufweist. Durch diese Maßnahmen gelangt das rückgesaugte It is particularly expedient if the partition plate is arranged approximately diagonally in the dirty liquid compartment and / or if the partition plate has a rough surface. The measures taken back through these measures
Schmutzwasser zunächst in den einen Bereich des Schmutzflüssigkeitsabteils, wobei der Schmutz bereits auf der Trennplatte, insbesondere aufgrund der rauhen Oberfläche derselben, sedimentiert, außerdem findet auch keine Vermischung mit dem im anderen Bereich des Schmutzflüssigkeitsabteils befindlichen, schon sedimentierten Schmutzwasser statt. Dirty water initially in one area of the dirty liquid compartment, the dirt already sedimenting on the separating plate, in particular due to the rough surface thereof, and there is also no mixing with the already sedimented dirty water in the other area of the dirty liquid compartment.
Weiterhin ist in vorteilhafter Ausgestaltung der Erfindung vorgesehen, daß am Frischflüssigkeitsaustritt des Frischflüssigkeitsabteils ein Filter angeordnet ist. Dies hat den Vorteil, daß etwaige Schmutzpartikel, die doch in das Furthermore, it is provided in an advantageous embodiment of the invention that a filter is arranged at the fresh liquid outlet of the fresh liquid compartment. This has the advantage that any dirt particles that are in the
Frischflüssigkeitsabteil eingetreten sind, nicht aus diesen austreten und den Reinigungsvorgang beeinträchtigen können. Fresh liquid compartment have entered, do not emerge from it and can impair the cleaning process.
Als besonders geeignet hat es sich herausgestellt, wenn der Filter als Filterzylinder mit darauf wechselbar angeordnetem Filterstrumpf ausgebildet ist. Dieser Filterzylinder weist Öffnungen am Mantel auf, die durch den Filterstrumpf überdeckt sind. Dabei ist der Filter so angeordnet, daß er sich ständig unterhalb der Flüssigkeitsoberfläche befindet. Durch die Bewegung des Reinigungsautomaten und die damit verbundene Bewegung des Wassers im Frischflüssigkeitsabteil wird der Filterzylinder durch die Schwappbewegung des Wassers immer wieder freigespült, so daß eine Verstopfung weitgehend vermieden wird. It has turned out to be particularly suitable if the filter is designed as a filter cylinder with an exchangeable filter sock arranged thereon. This filter cylinder has openings in the jacket which are covered by the filter sock. The filter is arranged so that it is always below the liquid surface. Due to the movement of the cleaning machine and the associated movement of the water in the fresh liquid compartment, the filter cylinder is flushed again and again by the sloshing movement of the water, so that a blockage is largely avoided.
Um eine Verstopfung des Filterzylinders vollständig zu vermeiden und den zugehörigen Filterstrumpf ggf. auszuwechseln, ist vorgesehen, daß zwischen dem Filter und der an die Frischflüssigkeitsaustrittsleitung angeschlossenen Pumpe ein Unterdruckwächter angeordnet ist. Tritt dann auf grund der Verstopfung des Filters keine oder zu wenig Flüssιgκeit durch den Filter, so stellt sich hinter dem Filter ein entsprechender unterdrück ein, der von dem ünterdruckwächter wahrgenommen wird. Dieser Unterdruckwächter ist dann mit einer entsprechenden Anzeige (optisch und/oder akustisch) verbunden, so daß das Bedienungspersonal entsprechend den Filterstrumpf wechseln bzw. reinigen kann. In order to completely avoid clogging of the filter cylinder and, if necessary, to replace the associated filter sock, it is provided that a vacuum monitor is arranged between the filter and the pump connected to the fresh liquid outlet line. Then occurs due to the blockage of the filter with no or too little liquid through the filter, a corresponding negative pressure is set up behind the filter, which is sensed by the negative pressure monitor. This vacuum monitor is then connected to a corresponding display (optically and / or acoustically) so that the operating personnel can change or clean the filter stocking accordingly.
Die Erfindung ist nachstehend anhand der Zeichnung beispielsweise näher erläutert. Diese zeigt in The invention is explained below with reference to the drawing, for example. This shows in
Fig. 1 in perspektivischer Darstellung einen fahrbaren Bodenreinigungsautomaten nach der Erfindung, 1 is a perspective view of a mobile floor cleaning machine according to the invention,
Fig. 2 ebenfalls in perspektivischer Darstellung teilweise einen Flüssigkeitsbehälter des Bodenreinigungsautomaten mit Frisch- und Schmutzflüssigkeitsabteil und Fig. 2 also partially in perspective a liquid container of the floor cleaning machine with fresh and dirty liquid compartment and
Fig. 3 in vereinfachter Darstellung einen Filter für den Fig. 3 in a simplified representation of a filter for the
Austritt des Frischflüssigkeitsabteils.  Exit of the fresh liquid compartment.
Der in Fig. 1 dargestellte fahrbare Bodenreinigungsautomat weist einen insgesamt mit 1 bezeichneten Wagen mit Fahrrollen 2 und einem Lenker 3 mit nicht näher dargestellter Bedienungseinrichtung auf. Einen großen Teil des Inneren des Wagens 1 nimmt ein insgesamt mit 4 bezeichneter Flüssigkeitstank ein, der mit einem Deckel 5 verschließbar ist. Der Flüssigkeitstank 4 besteht aus einem Frischwasserabteil 6 und einem Schmutzwasserabteil 7, wobei beide Abteile durch eine feste Zwischenwand 8 voneinander getrennt sind. The mobile floor cleaning machine shown in FIG. 1 has a carriage, generally designated 1, with castors 2 and a handlebar 3 with an operating device (not shown). A large part of the interior of the carriage 1 is occupied by a liquid tank, generally designated 4, which can be closed with a cover 5. The liquid tank 4 consists of a fresh water compartment 6 and a dirty water compartment 7, the two compartments being separated from one another by a fixed partition 8.
An oer Unterseite des Wagens 1 ist ein Reinigungsrotor 9 dargestellt, der von einem nicht sichtbaren Antrieb angetrieben werden kann. Im rückwärtigen Unterbereich des Wagens, d.h. auf der vom Reinigungsrotor 9 abgewandten Seite der Fahrrollen 2, sind mehrere Saugdüsen 10 vorgesehen, die an einem Saugbalken 11 angeordnet sind. An den Saugbalken 11 ist ein Saugschlauch 12 mit Stutzen 13 angeschlossen, der in das Schmutzflüssigkeitsabteil 7 des Flüssigkeitstanks 4 mündet. On the underside of the carriage 1, a cleaning rotor 9 is shown, which can be driven by an invisible drive. In the rear sub-area of the car, i.e. On the side of the driving rollers 2 facing away from the cleaning rotor 9, a plurality of suction nozzles 10 are provided, which are arranged on a suction bar 11. A suction hose 12 with a connector 13 is connected to the suction bar 11 and opens into the dirty liquid compartment 7 of the liquid tank 4.
Wesentlich für die Erfindung ist die Ausbildung des Flüssigkeitstankes 4. Dabei ist zunächst in der Zwischenwand 8 zwischen Frisch- und Schmutzflüssigkeitsabteil 6,7 im oberen Bereich des Tanks 4 eine Druckausgleichsöffnung 14 vorgesehen (Fig. 2), die bei eingeschaltetem, nicht dargestellten Saugmotor bei Absaugung des Schmutzwassers durch die Saugdüsen 10 einen einheitlichen Unterdruck im Flüssigkeitstank 4 gewährleistet. The design of the liquid tank 4 is essential for the invention. First, a pressure equalization opening 14 is provided in the intermediate wall 8 between the fresh and dirty liquid compartment 6, 7 in the upper region of the tank 4 (FIG. 2), which, when the naturally aspirated engine is not shown, is switched on Suction of the dirty water through the suction nozzles 10 ensures a uniform vacuum in the liquid tank 4.
Das Schmutzflüssigkeitsabteil 7 ist durch eine diagonal angeordnete Trennplatte 15 in zwei Bereiche unterteilt. Dabei ist die Trennplatte 15 nur angedeutet, um die Übrigen Teile im Tank noch erkennen zu können. Im oberen Bereich 16 des ochnutzflüssigkeitabteils 7 ist die Schmutzwassereintr ittsoffnung (Stutzen 13) angeordnet, so daß das Schmutzwasser zunächst in den oberen Bereich 16 eintritt. In Fig. 2 ist weiterhin im oberen Bereich 16 des Schmutzflüssigkeitsabteils 7 ein Schwimmer 17 sowie ein Filtersieb 18 dargestellt. The dirty liquid compartment 7 is divided into two areas by a diagonally arranged partition plate 15. The partition plate 15 is only indicated to the remaining parts still recognizable in the tank. In the upper area 16 of the usable liquid compartment 7, the dirty water inlet opening (connection 13) is arranged, so that the dirty water first enters the upper area 16. 2, a float 17 and a filter screen 18 are also shown in the upper region 16 of the dirty liquid compartment 7.
Zwischen dem Frischflüssigkeitsabteil 6 und dem Schmutzflüssigkeitsabteil 7 ist ein die Zwischenwand 8 durchdringendes Überlaufröhr 19 angeordnet, das im wesentlichen parallel zur Zwischenwand 8 verläuft und zwei um 90° abgewinkelte Öffnungsstutzen aufweist, eine Eintrittsöffnung 20 und eine Austrittsöffnung 21. Die Eintrittsöffnung 20 ist im Arranged between the fresh liquid compartment 6 and the dirty liquid compartment 7 is an overflow tube 19 penetrating the intermediate wall 8, which runs essentially parallel to the intermediate wall 8 and has two opening connections angled by 90 °, an inlet opening 20 and an outlet opening 21. The inlet opening 20 is in the
Scnmutzflüssigkeitsabteil 7 oberhalb der Bodenfläche desselben, aber unterhalb der diagonalen Trennplatte 15 im unteren Bereich 22 des Schmutzflüssigkeitsabteils 7 angeordnet. Die Austrittsöffnung 21 ist dagegen im Bereich der Bodenflache des Frischflüssigkeitsabteils 6 angeordnet. Dirty liquid compartment 7 is arranged above the bottom surface thereof, but below the diagonal partition plate 15 in the lower region 22 of the dirty liquid compartment 7. The outlet opening 21, on the other hand, is arranged in the region of the bottom surface of the fresh liquid compartment 6.
Im Frischflüssigkeitsabteil 6 ist außerdem ein Frischflüssigkeitsaustritt 23 vorgesehen, an dem ein schwimmender Absaugtrichter 24 angeordnet ist. Dieser Ansaugtrichter 24 ist mit einem Filter versehen, der als Filterzylinder 25 ausgebildet ist. Dieser Filterzylinder 25 hat einen geschlossenen Deckel und Boden, in letzterem befindet sich allerdings eine Auslauftülle 26. Der Mantel 27 des Filterzy linders 25 ist stark gelocht, was in der Zeichnung nicht näner dargestellt ist. Über den Zylinder 25 ist ein Filtrierstrumpf 28 gezogen, der vorzugsweise aus synthetischem Gewebe mit entsprechender Maschenweite (30 bis 1000 um) gezogen. In the fresh liquid compartment 6 there is also a fresh liquid outlet 23, on which a floating suction funnel 24 is arranged. This suction funnel 24 is provided with a filter which is designed as a filter cylinder 25. This filter cylinder 25 has a closed lid and bottom, but in the latter there is an outlet spout 26. The jacket 27 of the Filterzy Linders 25 is heavily perforated, which is not shown in the drawing. A filtering stocking 28 is drawn over the cylinder 25, which is preferably made of synthetic fabric with an appropriate mesh size (30 to 1000 μm).
Zwischen dem Filtrierzylinder 25 und einer in Fig. 3 nur angedeuteten Laugenpumpe 29, die die Frischflüssigkeit über eine Frischflüssigkeitsaustrittsleitung 31 aus dem Frischflüssigkeitsabteil 6 zum Reinigungsrotor 9 fördert, ist über ein T-Stück ein Unterdruckwächter 30 verbunden, der in Fig. 3 ebenfalls nur prinzipiell dargestellt ist. Between the filter cylinder 25 and a drain pump 29, which is only indicated in FIG. 3 and which conveys the fresh liquid via a fresh liquid outlet line 31 from the fresh liquid compartment 6 to the cleaning rotor 9, a vacuum monitor 30 is connected via a T-piece, which is also only in principle in FIG. 3 is shown.
Bei Inbetriebnahme des Reinigungsautomaten ist der Flüssigkeitstank 4 vollständig gefüllt, d.h. beide Flüssigkeitsabteile 6, 7. Im Beispiel weist der Tank 4 ein Volumen von etwa 60 1 auf. Wird der nicht dargestellte Saugmotor in Betrieb genommen, so baut sich aufgrund der Druckausgleichsöffnung 14 in beiden Flüssigkeitsabteilen 6, 7 ein einheitlicher Unterdruck auf. Das durch die Saugdüsen 10 rückgeführte Schmutzwasser gelangt durch den Saugschlauch 12 und den Stutzen 13 bzw. Schmutzwassereintritt in den oberen Bereich 16 des Schmutzflüssigkeitsabteils 6. Die Schmutzflotte befindet sich nun zunächst im oberen Bereich 16 und gelangt noch nicht in Kontakt mit der unterhalb der Trennplatte 15 befindlichen Flüssigkeit, so daß keine Vermischung mit dieser teilweise geklärten Lösung stattfindet. Der im Schmutzwasser enthaltene Feststoffschmutz kann sich auf der Oberfläche der Trennplatte 15, die bevorzugt gerippt ausgebildet ist, absetzen. When the automatic cleaning machine is started up, the liquid tank 4 is completely filled, ie both liquid compartments 6, 7. In the example, the tank 4 has a volume of approximately 60 l. If the naturally aspirated engine (not shown) is put into operation, a uniform negative pressure builds up in both liquid compartments 6, 7 due to the pressure compensation opening 14. The dirty water returned through the suction nozzles 10 reaches the upper area 16 of the dirty liquid compartment 6 through the suction hose 12 and the nozzle 13 or dirty water inlet 6. The dirty liquor is now initially in the upper area 16 and does not yet come into contact with the one below the separating plate 15 located liquid, so that no mixing with this partially clarified solution takes place. The one in Solid dirt contained in dirty water can settle on the surface of the separating plate 15, which is preferably ribbed.
An der tiefsten Stelle der Trennplatte 15, vorzugsweise etwa 2 cm über dem Tankboden, muß die Flotte durchtreten, um in den anderen Bereich 22 des Schmutzflüssigkeitsabteils 6 zu gelangen. Während dieser Durchströmung, die eine gewisse Zeit in Anspruch nimmt, findet ein Sedimentationsvorgang statt, d.h. die festen Schmutzpartikel setzen sich auf dem Boden des Flüssigkeitsabteils 6 ab. Im anderen Bereich 22 des Flüssigkeitsabteils 7 gelangt die teilgeklärte, nicht mehr mit Feststoffen beladene Flüssigkeit durch die in etwa in Höhe der 40 1-Markierung befindliche Eintrittsöffnung 20 des Überlaufrohres 19. Durch das Überlaufröhr tritt diese Flüssigkeit im Bodenbereich des Frischwasserabteils 6 in diesen ein, so daß die vorgeklärte Flotte aus dem Schmutzwasserabteil 7 entgegengesetzt zum Filtrierzylinder 25 an den Boden des Frischwasserabteils 6 geleitet wird. At the lowest point of the partition plate 15, preferably about 2 cm above the tank bottom, the liquor must pass through in order to reach the other area 22 of the dirty liquid compartment 6. During this flow, which takes a certain time, a sedimentation process takes place, i.e. the solid dirt particles settle on the bottom of the liquid compartment 6. In the other area 22 of the liquid compartment 7, the partially clarified liquid, which is no longer loaded with solids, passes through the inlet opening 20 of the overflow pipe 19, which is located approximately at the 40 1 mark. Through the overflow pipe, this liquid enters the fresh water compartment 6 in the bottom area thereof so that the pre-clarified liquor from the dirty water compartment 7 is directed opposite to the filter cylinder 25 to the bottom of the fresh water compartment 6.
In den Tanks befinden sich etwa 60 1 Wasser, wobei pro Minute etwa 2 1 abgepumpt bzw. aufgesaugt werden. Danach erfolgt etwa nach 30 Minuten ein Flottenumschlag, woraus sich das gute Sedimentationsergebnis erklärt. There are about 60 liters of water in the tanks, with about 2 liters being pumped out or sucked up per minute. This is followed by a fleet change after about 30 minutes, which explains the good sedimentation result.
Die in das Frischflüssigkeitsabteil 6 eingetretene vorgeklärte Flotte wird von der Laugenpumpe 29 über den Filtrier zylinder 25 angesaugt und über den Reinigungsrotor 9 auf die Reinigungsfläche gepumpt. The pre-clarified liquor which has entered the fresh liquid compartment 6 is discharged by the drain pump 29 through the filter cylinder 25 sucked in and pumped via the cleaning rotor 9 onto the cleaning surface.
Bei Betrieb der Laugenpumpe 29 strömt ständig Wasser durch den Filtrierstrumpf 28. Nach entsprechender Betriebsdauer und Schmutzaufnahme wird sich der Strumpf mehr oder weniger zusetzen. So entsteht ein Widerstand, der die Pumpe 29 einen Unterdruck in der Frischflüssigkeitsaustrittsleitung 31 aufbauen läßt, der vom Unterdruckwächter 30 registriert wird. Dieser Unterdruck kann über eine Anzeige signalisieren, daß die Reinigungsflotte erschöpft ist, d.h. zu stark mit Feststoffschmutzpartikeln beladen ist. Das Signal wird auch akustisch abgegeben, wenn dies gewünscht wird. Der Filterstrumpf 28 kann dann vom Betriebspersonal gewechselt werden. When the drain pump 29 is operating, water constantly flows through the filtering stocking 28. After the corresponding operating time and dirt pick-up, the stocking will become more or less clogged. This creates a resistance that causes the pump 29 to build up a negative pressure in the fresh liquid outlet line 31, which is registered by the negative pressure monitor 30. This negative pressure can signalize that the cleaning liquor is exhausted, i.e. is too heavily loaded with solid dirt particles. The signal is also emitted acoustically if so desired. The filter sock 28 can then be changed by the operating personnel.
Grundsätzlich ist der Filtrierzylinder 25 so angeordnet, daß er im Flüssigkeitsabteil 6 ständig umspült ist. Durch die leichten Schwappbewegungen während des Fahrens wird der Filtrierstrumpf 28 immer wieder freigespült, so daß er nicht so schnell verstopft. Basically, the filter cylinder 25 is arranged so that it is constantly washed around in the liquid compartment 6. Due to the slight sloshing movements while driving, the filtering stocking 28 is flushed out again and again so that it does not clog up so quickly.
Natürlich ist die Erfindung nicht auf das in der Zeichnung dargestellte Ausführungsbeispiel beschränkt. Weitere Ausgestaltungen der Erfindung sind möglich, ohne den Grundgedanken zu verlassen. So können zur Verbesserung der Sedimenta tion im Scnmutzflüssigkeitsaoteil 7 auch nocn weitere Einbauten vorgesehen sein und dgl. mehr. Of course, the invention is not limited to the embodiment shown in the drawing. Further refinements of the invention are possible without leaving the basic idea. So can improve the sedimenta tion in the dirt liquid part 7, nocn further internals and the like. More.

Claims

Ansprüche: Expectations:
1. Fahrbarer Bodenreinigungsautomat mit integrierten Frischund Schmutzflüssigkeitsabteilen, mit einem aus dem Frischflüssigkeitsabteil zu versorgenαen Reinigungsrotor sowie mit mindestens einer in das Schmutzflüssigkeitsabteil fördernden Saugdüse, wobei das Frisch- und Schmutzflüssigkeitsabteil durch eine feste, einen Flüssigkeitsdurchtritt vom Schmutz- in das Frischflüssigkeitsabteil ermöglichende Zwischenwand voneinander getrennt sind, 1. Mobile floor cleaning machine with integrated fresh and dirty liquid compartments, with a cleaning rotor to be supplied from the fresh liquid compartment as well as with at least one suction nozzle conveying into the dirty liquid compartment, the fresh and dirty liquid compartments being separated from one another by a solid partition that allows liquid to pass from the dirty into the fresh liquid compartment ,
dadurch gekennzeichnet,  characterized,
daß im oberen Bereich der Zwischenwand (8) eine Druckausgleichsöffnung (14) vorgesehen ist und daß zwischen dem Frisch- und Schmutzflüssigkeitsabteil (6,7) ein die Zwischenwand (8) durchdringendes Überlaufröhr (19) angeordnet ist, dessen Eintrittsöffnung (20) oberhalb der Bodenfläche im Schmutzflüssigkeitsabteil (7) und dessen Austrittsöffnung (21) im Bereich der Bodenfläche des Frischflüssigkeitsabteils (6) angeordnet ist.  that a pressure equalization opening (14) is provided in the upper region of the intermediate wall (8) and that an overflow tube (19) penetrating the intermediate wall (8) is arranged between the fresh and dirty liquid compartment (6, 7), the inlet opening (20) of which is above the Bottom surface in the dirty liquid compartment (7) and its outlet opening (21) is arranged in the region of the bottom surface of the fresh liquid compartment (6).
2. Bodenreinigungsautomat nach Anspruch 1, 2. Floor cleaning machine according to claim 1,
dadurch gekennzeichnet,  characterized,
daß im Schmutzflüssigkeitsabteil (7) eine zwei Bereiche (16,22) trennende Trennplatte (15) angeordnet ist, wobei in einem Bereich (16). die Schmutzwassereintrittsöffnung (13) und im anderen Bereich (22) die überlaufeintrittsöffnung (20) angeordnet ist. that a separating plate (15) separating two areas (16, 22) is arranged in the dirty liquid compartment (7), one area (16). the dirty water inlet opening (13) and in the other area (22) the overflow inlet opening (20) is arranged.
3. üodenreiniyungsautomat nach Anspruch 2 , 3. üodenreiniyungsautomat according to claim 2,
dadurch gekennzeichnet,  characterized,
daß die Trennplatte (15) etwa diagonal im Schmutzflüssigkeitsabteil (7) angeordnet ist.  that the partition plate (15) is arranged approximately diagonally in the dirty liquid compartment (7).
4. ßodenreinigungsautomat nach Anspruch 2 oder 3, 4. oden cleaning machine according to claim 2 or 3,
dadurch gekennzeichnet,  characterized,
daß die Trennplatte (15) eine rauhe Oberfläche aufweist.  that the partition plate (15) has a rough surface.
5. Bodenreinigungsautomat nach Anspruch 1 oder einem der folgenden, 5. Floor cleaning machine according to claim 1 or one of the following,
dadurch gekennzeichnet,  characterized,
daß am Frischflüssigkeitsaustritt (23) des Frischflüssigkeitsabteils (6) ein Filter (25) angeordnet ist.  that a filter (25) is arranged at the fresh liquid outlet (23) of the fresh liquid compartment (6).
6. Bodenreinigungsautomat nach Anspruch 5, 6. Floor cleaning machine according to claim 5,
dadurch gekennzeichnet,  characterized,
daß der Filter als Filterzylinder (25) mit darauf wechselbar angeordnetem Filterstrumpf (28) ausgebildet ist.  that the filter is designed as a filter cylinder (25) with an exchangeably arranged filter sock (28).
7. Bodenreinigungsautomat nach Anspruch 5 oder 6, 7. Floor cleaning machine according to claim 5 or 6,
dadurch gekennzeichnet,  characterized,
daß zwischen dem Filter (25) und der an die Frischflüssigkeitsaustrittsleitung (31) angeschlossenen Pumpe (29) ein Unterdruckwächter (30) angeordnet ist.  that a vacuum monitor (30) is arranged between the filter (25) and the pump (29) connected to the fresh liquid outlet line (31).
EP92912779A 1991-07-05 1992-06-26 Mobile floor cleaning machine Expired - Lifetime EP0593521B1 (en)

Applications Claiming Priority (3)

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DE4122280 1991-07-05
DE4122280A DE4122280C2 (en) 1991-07-05 1991-07-05 Mobile floor cleaning machine
PCT/EP1992/001447 WO1993000853A1 (en) 1991-07-05 1992-06-26 Mobile floor cleaning machine

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EP0593521A1 true EP0593521A1 (en) 1994-04-27
EP0593521B1 EP0593521B1 (en) 1996-02-21

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AT (1) ATE134306T1 (en)
DE (2) DE4122280C2 (en)
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DE4122280A1 (en) 1993-01-14
ATE134306T1 (en) 1996-03-15
US5535476A (en) 1996-07-16
DE4122280C2 (en) 1994-08-18
GR3019102T3 (en) 1996-05-31
WO1993000853A1 (en) 1993-01-21
ES2084362T3 (en) 1996-05-01
DE59205413D1 (en) 1996-03-28
EP0593521B1 (en) 1996-02-21

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