EP0155502B1 - Cleaning apparatus for swimming-pools or the like - Google Patents

Cleaning apparatus for swimming-pools or the like Download PDF

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Publication number
EP0155502B1
EP0155502B1 EP85101605A EP85101605A EP0155502B1 EP 0155502 B1 EP0155502 B1 EP 0155502B1 EP 85101605 A EP85101605 A EP 85101605A EP 85101605 A EP85101605 A EP 85101605A EP 0155502 B1 EP0155502 B1 EP 0155502B1
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EP
European Patent Office
Prior art keywords
suction
filter
wet filter
vacuum chamber
tank
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
EP85101605A
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German (de)
French (fr)
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EP0155502A3 (en
EP0155502A2 (en
Inventor
Günter Kulitz
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.)
Esta Apparatebau GmbH and Co KG
Original Assignee
Esta Apparatebau GmbH and Co KG
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Filing date
Publication date
Application filed by Esta Apparatebau GmbH and Co KG filed Critical Esta Apparatebau GmbH and Co KG
Priority to AT85101605T priority Critical patent/ATE55444T1/en
Publication of EP0155502A2 publication Critical patent/EP0155502A2/en
Publication of EP0155502A3 publication Critical patent/EP0155502A3/en
Application granted granted Critical
Publication of EP0155502B1 publication Critical patent/EP0155502B1/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00Swimming or splash baths or pools
    • E04H4/14Parts, details or accessories not otherwise provided for
    • E04H4/16Parts, details or accessories not otherwise provided for specially adapted for cleaning
    • E04H4/1618Hand-held powered cleaners
    • E04H4/1636Suction cleaners

Definitions

  • the invention relates to a mobile cleaning device for liquids, such as water, with a suction device having a suction connection for the liquid to be cleaned, a wet filter arranged in the liquid flow and defining a filter inlet side and a pressure connection and, for example, a pump-containing return device for the cleaned liquid, the Suction device and the return device each have an inlet on the suction side and both inlets are connected to an air-containing vacuum chamber to be evacuated by the suction device, into which the suction connection opens, and the return device is also provided in the flow path of the liquid after the wet filter.
  • a suction device having a suction connection for the liquid to be cleaned, a wet filter arranged in the liquid flow and defining a filter inlet side and a pressure connection and, for example, a pump-containing return device for the cleaned liquid
  • the Suction device and the return device each have an inlet on the suction side and both inlets are connected to an air-containing vacuum chamber to be evacuated by the suction device, into which
  • GB-A-1 336 117 has disclosed a cleaning device for cleaning the cooling liquid of machine tools, in which a horizontal boiler is divided into two chambers, namely a filter chamber and a storage chamber for the cleaned liquid. Above the liquid level, the suction-side inlet of a suction blower is connected to the storage chamber and is indirectly connected to the filter chamber via a pipeline passing through the intermediate wall between the two chambers. Below this pipeline, the two chambers are connected to one another via a check valve so that cleaned liquid can only get from the filter chamber into the storage chamber. The lower end of the suction pipe of a water pump protrudes into the storage chamber, which receives a pump rotor which is connected to a motor outside the boiler.
  • suction-side inlet which serves to evacuate the boiler, opens into the storage chamber, this inlet is located relatively far from the wet filter and from the suction port for the liquid to be cleaned, this suction-side inlet also being arranged downstream of the filter outlet side of the wet filter. This results in a relatively poor efficiency, a space-consuming construction and only a delayed response of the suction effect when commissioning.
  • the invention is based on the object of providing a cleaning device of the type mentioned at the outset which, even with a compact design, has high performance and low susceptibility to failure.
  • a cleaning device of the type mentioned according to the invention in that the suction-side inlet of the suction device is assigned to the filter inlet side of the wet filter.
  • the suction device does not need to suck the liquid to be cleaned through the wet filter, so that it works practically irrespective of its degree of soiling and very quickly creates a sufficiently high vacuum in the vacuum chamber when it is started up.
  • This also protects the suction device. Since the contaminated water is sucked in with a high liter output without having to pass through any moving machine parts and then fed to a possibly very large-area filter, the wet filter can be set to a very fine filtration by the design according to the invention without impairing the throughput.
  • the return device is only exposed to the filtered water, so that it is not subject to interference or damage from dirt.
  • the cleaning device according to the invention is particularly suitable for swimming pools or the like.
  • swimming pools in particular the bottom of swimming pools, two different types of devices are mainly used.
  • the type of device of the type mentioned above usually has a self-propelled rotor driven by an electric motor, which runs off the bottom of the swimming pool and sucks in water with loosened dirt via a pump and presses it through a pressure or outlet-side wet filter in the form of, for example, a filter bag and return the filtered water back to the swimming pool.
  • the pump is both a component of the suction device and the return device for the cleaned liquid.
  • the other type of device generally has a suction nozzle which can be guided with a rod or tube and which is connected via a hose to the surface suction of the swimming pool, namely the so-called “skimmer”.
  • the sucked-in dirt is retained in the swimming pool filter stationary associated with the swimming pool, which leads to very rapid contamination, for example with leaves, of the filter. Furthermore, there are very high backwash losses in the swimming pool water because these filters have to be cleaned by backwashing and removing the backwash water.
  • the coarse dirt accumulating when cleaning the swimming pool also leads to unsanitary contamination of the swimming pool filter, which is constantly in communication with the swimming pool water.
  • a very compact design of the subject matter of the invention is obtained if the suction opening of the return device and the vacuum chamber are provided one above the other in a common main chamber, in particular a boiler standing upright due to its vertical extension, the vacuum chamber in particular due to the pressure-tight space above the liquid level of a liquid intermediate store in the main chamber is formed.
  • the intermediate store can be used in a simple manner to prevent the return device from running dry, although a pump can also be provided which has good dry-running properties. Since the intermediate store communicates with the vacuum chamber, when vacuuming filtered water from the intermediate store, the negative pressure in the vacuum chamber and thus the suction power of the suction device are increased accordingly.
  • suction device and the feedback device by separate units, which are preferably driven by separate motors, for example electric motors.
  • separate motors for example electric motors.
  • a separate motor suction fan and a motor pump are each structurally combined with the boiler.
  • the pump can be arranged in a simple manner, for example in the form of a submersible pump, below the vacuum chamber, preferably on the bottom of the main chamber, so that it contributes to a low position of the center of gravity of the cleaning device.
  • At least one suction opening is expediently located in the immediate vicinity of the floor and the pressure line is led out of the main chamber in a pressure-tight manner, so that negative pressure losses in the negative pressure chamber are avoided and the intermediate store can be at least almost completely emptied by the pump.
  • the delivery rates of the suction device and the feedback device can be coordinated with one another in a particularly simple manner in that the feedback device is controlled as a function of the liquid level in the cleaning device, preferably with a float switch. If the return device is matched to the suction device in such a way that the wet filter lies above the highest liquid level, the water can flow through the wet filter unhindered, and in addition it is avoided that the dirt retained in the wet filter is suspended by the filtered water.
  • the pump is expediently designed in such a way that it has a somewhat higher delivery capacity than the suction fan, so that it is switched off automatically several times during operation, for example by the float switch. While the pump is not delivering, a return suction via the outlet of the return device is prevented by the check valve mentioned.
  • the suction device is arranged on the upper side of the vacuum chamber and preferably detachably closes the wet filter and / or the vacuum chamber at an upper opening with the suction side, in particular the suction device providing a boiler lid and / or a ring clamp for forms the wet filter.
  • the suction device can also be placed as a suction head or boiler lid on another, not a return device, but rather as a buffer tank for dust-containing boilers and thus form a high-performance vacuum or wet vacuum cleaner.
  • the suction nozzle leading into this boiler opens into the boiler such that the filter or filter bag lies between its mouth and the suction side of the suction device, so that dirt does not flow through the suction device.
  • the suction connection expediently opens below the suction device, in particular directed obliquely downwards, into the vacuum chamber, wherein it is preferably formed by a nozzle inserted radially into the boiler wall, so that there is practically no risk of water entering the Suction device is sucked.
  • Both the suction device and the return device thus work in unpolluted medium, namely the suction device with air and the return device with filtered water.
  • the Suction opening of the suction device is assigned a float valve, which preferably has a float standing in the axis of the boiler, which is guided in a support cage or the like for the wet filter, which engages in the wet filter and is structurally combined with the suction device, and in particular in the initial position with its valve closing member at approximately the height of the suction port adjacent to its circumference. Due to the correspondingly lightweight and large-volume design of the float, the swimmer responds quickly even to small amounts of water. The fact that a support cage is provided for the wet filter, then this can be kept in a simple manner in a wide area despite the low pressure. If this support cage forms part of the boiler lid, it is also effective when another boiler is used.
  • a filter housing in the form of, preferably, a coated textile jacket with a dimensionally stable, perforated base is required to hold the, particularly replaceable or designed as a disposable filter , for example a perforated plate, is provided, which in particular has a lateral opening for the sealed passage through the suction connection.
  • This filter housing which is coated, for example, with a rubber-like plastic and is network-like, supports the wet filter against the impinging contaminated water.
  • the wet filter is filled with dirt, it can be removed from the cleaning device in a simple manner as a container holding this dirt, including the dirt thrown away and replaced by a new wet filter.
  • the wet filter is fastened by clamping its upper, turned-out edge against a profile ring which seals the upper side of the vacuum chamber and which preferably carries the filter housing and / or is stepped radially inward from top to bottom several times. If the boiler lid or the suction device is removed from the boiler, the wet filter is thus freely accessible for removal.
  • the cleaning device has a chassis, which is preferably provided with self-steering trailing wheels, so that it can be driven around the outside of the swimming pool or retightened with a suction hose connected to its suction connection.
  • a sink hose is expediently connected to the outlet of the return device, the outlet-side end of which lies below the water level in the swimming pool.
  • the invention further relates to a wet filter for a cleaning device of the type described, which - in the form of a filter bag or the like.
  • a paper fleece with high hydraulic permeability has a push-through opening in the jacket for the suction connection, which is preferably attached by one on its inside, one elastically limited passage opening for the cuff having suction connection is formed in the form of, for example, a flat, flexible reinforcement.
  • the filter bag or paper tile is bound to be moisture-resistant. After insertion into the filter housing, the filter bag with its through opening is pushed over the suction nozzle of the suction device, so that its mouth lies inside the filter bag.
  • the elastic reinforcement results in a very secure hold and a good seal.
  • the reinforcement can be attached to the paper tile, for example, by a sewing seam.
  • a cleaning device has a thin-walled cylindrical and upright boiler 1, the lower end of which is closed by a bottom 2 which is integrally connected to the boiler shell, while the upper opening of the boiler corresponding to the inside width of the boiler shell 3 1 is closed with a detachable boiler lid 4.
  • the boiler 1 the height of which is approximately twice as large as its diameter, encloses a main chamber 5 which has the same cross-sections throughout its height and which has an air-containing vacuum chamber 6 in its upper, higher region and, for example, approximately one third of the total height of the lower chamber
  • Main chamber 5 area forms a liquid buffer 7.
  • two diametrically opposite handles 8 are provided on the outside of the boiler shell 3 for carrying the cleaning device.
  • the cleaning device is arranged in the illustrated embodiment on a four-wheel chassis 9, which is designed in the manner of a wheelbarrow, and has a standing chassis 10 deep, ie at a short distance above the running level, on the annular bottom of which the boiler 1 is sunk with its bottom and can be lifted out stands, with the stand chassis 10 an outer wall changing several times in height dung, which is immediately adjacent to the outside of the boiler shell 3, so that the boiler 1 is centered relative to the stand chassis 10 and secured against lateral slipping.
  • Two wheels of the chassis 9 lying on the front are designed as self-steering trailing wheels 11 in the manner of furniture casters, which lie completely below the underside of the stand chassis 10.
  • At the back of the chassis 9 is provided with an approximately U-shaped bow handle 13, the downward legs of which are fastened in corresponding wall projections of the base chassis 10 and the horizontal handle cross bar located above at the height of the upper end of the boiler shell 3 and at a distance from it External circumference is provided.
  • the cleaning device with the chassis 9 can be tilted backward into an inclined position about the axis of the wheels 12 and can be easily and quickly transported on the large wheels 12 without the ground wheels of the trailing wheels (11) touching even not particularly flat treads.
  • the boiler cover 4 is structurally combined with a suction device 14 to be operated by an electric motor, which suction device 14 is arranged and designed essentially coaxially with the boiler.
  • the suction device 14 has a clamping ring 15 which surrounds the upper edge of the boiler shell 3 on the outside and inside, which serves as the main support for the entire suction device 14 and which carries a substantially axially symmetrical suction fan 17 in a central, recessed flange hub 16 which engages in the boiler shell 3 , whose fan blower 18 is at the bottom and the electric motor 19, on the other hand, which is reduced in diameter, is at the top.
  • a cover cap 21 is fastened on the clamping ring 15 by means of spacers (not shown in detail) with a height spacing with the interposition of an intermediate ring 20, the suction fan 17 being clamped centered between the clamping ring 15 and the cover cap 21 with the interposition of centering rings 22 and a damping ring 23.
  • the outlet openings 24 located in the upper region of the fan blower 18 are surrounded by a filter ring 25, which is also clamped in a centered manner between the clamping ring 15 and the intermediate ring 20.
  • the suction opening 26 or the suction openings of the fan blower 18 lie on its lower end face essentially symmetrical to the central chase of the cleaning device.
  • the switch 27 possibly a control lamp, is used to switch the suction fan 17 on and off, and the cable feed for the mains cable is provided.
  • the associated electrical circuits are protected inside the cover cap 21.
  • a handle cap 28 On the top of the cover cap 21 is attached a handle cap 28 forming a bow handle, on which the entire suction device 14 can be carried or held.
  • two diametrically opposed bow tensioners in the form of, for example, wire-shaped eccentric clamps are attached to the outer circumference of the boiler 1 and each above the handles 8, which in the release position has its upper, hook-shaped to the central axis of the Boiler 1 angled ends moved over the upper annular end face of the clamping ring 15 and can then be resiliently tensioned against this upper end face by pressing down handles so that the clamping ring 15 is tensioned tightly against the upper end face of the boiler shell 3 with the interposition of a sealing ring 30.
  • the suction opening 26 of the fan blower 18 is assigned a float valve 31, which closes the suction opening 26 with respect to the vacuum chamber 6 even with the slightest liquid application.
  • the float valve 31 has an essentially cylindrical float 32, the diameter of which is approximately one third of the boiler diameter and on the upper, slightly enlarged diameter end face, an annular sealing plate 33, for example, is provided as a valve closing part.
  • the sealing disk 33 is assigned as a valve seat the underside of a lower annular end wall 34 of the flange hub 16 of the clamping ring 15, on the upper side of which the fan blower 18 is seated with tension with the interposition of a sealing and centering ring 22.
  • the float 32 is guided in a support cage 35 constructed of bent wire sections and therefore flowing or splashing water with no appreciable resistance, which is centered on the outer circumference of the end wall 34 of the clamping ring 15 and thus inserted in it to the suction device 14 or to Boiler 1 coaxial position is secured.
  • Upright wire sections are provided between the upper end ring 36 and two lower, concentric end rings 37, 38, of which one group evenly distributed over the circumference lies radially further out and the other group uniformly distributed over the circumference lies radially further inside.
  • the inner group of wire sections forms, at a short distance below the end ring 36, by corresponding offsets, support shoulders 39, on which the float 32 rests in its lower valve open position with the ring shoulder 40 formed by its upper extended end section.
  • the float valve 31 thus formed thus forms a structural unit part combined with the suction device 14, which, however, for example for cleaning the valve closing part 33, can easily be detached by pulling it off the suction device 14.
  • the underside of the support cage 35 lies only slightly above the middle of the height of the boiler 1.
  • the vacuum chamber 6 is designed to hold a waterproof filter, in this respect a wet filter 41, which is provided in the form of a flexible and, in the expanded state, approximately cylindrical filter bag made of a paper sheet or the like, the width of which is only comparatively slightly smaller than the clear width of the Vacuum chamber 6 is.
  • the wet filter 41 provided as a disposable filter is to be arranged interchangeably in a filter housing which is essentially formed by a coated, net-like textile jacket 42 and a flat perforated bottom 43 fastened to its lower end. In the expanded state, the textile jacket 42 is only slightly wider than the wet filter 41 and less wide than the clear width of the vacuum chamber 6.
  • the circular disk-shaped bottom 43 which is substantially uniformly perforated over its entire surface, is fastened in this way with an edge collar at the lower end section of the textile jacket 42 that in the operating position it lies in a plane perpendicular to the boiler axis.
  • the upper end of the textile jacket 42 is fastened to the outer circumference of the lowermost section of a profile ring 44 which is radially outwardly stepped upwards in two sections and which, with its uppermost step section, lies radially overlapping on the upper annular end face of the boiler jacket 3 after the boiler lid 4 has been removed .
  • the upper edge 45 of the wet filter 41 is slipped outwards, so that it is sealed by clamping after fastening the boiler cover 4 between the upper end face of the profile ring 44 and the sealing ring 30.
  • the edge 45 of the wet filter 41 can be turned back and the upper opening of the wet filter 41 can be closed, for example, by shirring, so that the wet filter 41, filled with dirt, for example, can then easily be used as a sack or with the filter housing from the vacuum chamber 6 can be lifted out.
  • the suction blower 14 or the vacuum or vacuum chamber 6 is assigned a nozzle 47, which is inserted into the boiler shell 3 with an approximately radial axis above half the height of the filter housing.
  • the nozzle 47 projecting radially into the interior of the vacuum chamber 6 forms with its inner end an outlet opening 48 which is shielded upwards and at the radially inner end in the direction of the float valve 31 by appropriate design of the nozzle walls.
  • the outlet opening 48 lies approximately in a plane which is provided approximately at an angle of 45 ° to the axial plane of the vacuum chamber 6 passing through it and rises slightly radially inwards.
  • the water entering the boiler flows obliquely downward and approximately tangentially directed into the wet filter to the wet filter 41, so that there is hardly any risk that water will splash up and be torn into the fan blower 18 by the suction flow.
  • the socket 47 which is essentially cylindrical on the outer circumference or slightly conically tapered towards its radially inner end
  • the jacket 42 of the filter housing has a slightly smaller circular opening 49 with which the textile jacket 42 is under tension and thus sits securely over the socket 47 is pushed.
  • the wet filter 41 also has a corresponding passage opening 50 in its jacket.
  • a flat reinforcement made of a rubber-elastic plastic film or the like is attached to the inside of the wet filter 41, for example by sewing seams, which is provided with a central hole corresponding to the outer cross section of the nozzle 47.
  • the wet filter 41 can be opened, for example, by a cross-shaped separating cut with a cutting length that is approximately equal to the diameter of the passage opening, in such a way that the approximately triangular tabs 52 detached from one another by the separating cuts when the wet filter 41 is fitted onto the Stubs 47 are struck inward by the reinforcement 51 and protrude into the wet filter 41.
  • the tabs 52 thereby contribute to the sealed contact of the wet filter 41 on the circumference of the nozzle 47.
  • the feedback device 53 has a pump 55 designed in the manner of an immersion pump, structurally combined with an electric motor 56, on the upper side of which the motor 56 is fastened in an axially aligned arrangement and which has suction openings 54 on its circumference in the lower region.
  • the pump 55 is fixed on the floor 2 in the boiler 2.
  • the electric motor can be supplied with power via a separate switch (not shown in more detail, for example attached to the boiler jacket 3) and a corresponding mains cable, or can be connected by suitable means to the electrical circuit in the cover cap 21, for example via a detachable line coupling.
  • a float switch 57 is arranged in the electrical feed line to the electric motor 56, which is connected via a flexible, insulated cable which is led out of the motor housing and is freely movable in the buffer store 7. From reaching one Predetermined water level in the intermediate store 7, the float switch 57 floats to a predetermined position determined by its mass distribution, whereby the electric motor 56 is switched on until the water level has dropped to a predetermined lower level by pumping off the water in the intermediate store 7, at which the Pump 55 is switched off again.
  • the outlet opening of the pump 55 is connected to the lower end of a pressure line 59 which is led upwards in the intermediate store 7 and which is led out through the boiler jacket 3 below the bottom 43 of the filter housing and is connected to a plug socket 60 fastened to the boiler jacket 3.
  • a check valve 61 is arranged in the pressure line 59 and closes when the vacuum is on the side facing the pump 55, so that in this case no water can flow back through the pump into the intermediate store 7.
  • a suction hose with one end is connected to the outer end of the nozzle 47 via a suitable coupling piece, which is provided at the other end with a suitable suction or pool cleaning head.
  • a hose of sufficient length that is sinkable in water is connected to the connector 60.
  • the cleaning device is set up with the chassis 9 next to the edge of the pool, the sinkable hose is drained into the water-filled pool, and the suction head or the like is also sunk in the pool water.
  • a negative pressure is built up in the vacuum chamber 6 with the check valve 61 closed, through which the contaminated water is sucked in through the outlet opening 48 into the wet filter 41 and, after filtering penetration of the wet filter 41, also from the inside in the intermediate store 7 is collected.
  • the pump 55 is switched on by the float switch 57 so that it counteracts the negative pressure in the boiler 1 and therefore with the participation in maintaining or increasing this negative pressure the water collected while opening the check valve 61 pumped out and returned to the swimming pool.
  • Parts of the cleaning device or the entire cleaning device can also be used for dry suction, in the manner of a vacuum cleaner, in addition to water purification.
  • Either the suction device 14 can be placed as a cover 4 and, using another filter 41, namely a filter designed as a dust filter, on another boiler, which in the upper region is essentially the same as the boiler 1 shown, and which has no return device 53 and therefore can have a lower overall height.
  • the dry filter then has no passage opening, such that the outlet opening 48 lies on its outside and the current to be filtered penetrates the filter from the outside inwards. Therefore, the dirt particles are separated on the outside of the filter and fall down into the boiler, where they are collected until they are emptied.
  • the cleaning device 53 for the operation of the cleaning device as a vacuum cleaner, so that it can remain in the boiler 1, but is not acted upon by the dirt then to be collected in the intermediate store 7.
  • the removable dust cover would have to be used or removed from the boiler 1. Since the cleaning device can be always miture in the swimming pool cleaning, a relatively short suction - used hose.
  • the cleaning device can also be used as a water feed pump, for example for watering a garden, for draining flooded basement rooms or the like.

Abstract

A cleaner has in a tank a vacuum pump protected by a float valve above the maximum possible water level and a submersible pump at the bottom and both of these in the tank produce a vacuum for the suction of water against the vacuum, the submersible pump moving the filtered water collected in the lower region of the tank out of the tank past a check valve. The vacuum pump is constructionally combined with a tank cover, so that it can be mounted on differently constructed tanks for different cleaning functions. For wet suction purposes, the associated paper filter bag has a passage opening for the suction connecting pieces, so that the water to be filtered passes through the filter from the inside to the outside.

Description

Die Erfindung betrifft ein mobiles Reinigungsgerät für Flüssigkeiten, wie Wasser, mit einer einen Sauganschluß aufweisenden Saugeinrichtung für die zu reinigende Flüssigkeit, einem im Flüssigkeitsstrom angeordneten, eine Filtereintrittsseite bestimmenden Naßfilter und einer einen Druckanschluß sowie beispielsweise eine pumpe aufweisenden Rückführeinrichtung für die gereinigte Flüssigkeit, wobei die Saugeinrichtung und die Rückführeinrichtung jeweils einen saugseitigen Einlaß aufweisen und beide Einlässe mit einer Luft enthaltenden, von der Saugeinrichtung zu evakuierenden Unterdruckkammer verbunden sind, in welche der Sauganschluß mündet und wobei ferner die Rückführeinrichtung im Strömungsweg der Flüssigkeit nach dem Naßfilter vorgesehen ist.The invention relates to a mobile cleaning device for liquids, such as water, with a suction device having a suction connection for the liquid to be cleaned, a wet filter arranged in the liquid flow and defining a filter inlet side and a pressure connection and, for example, a pump-containing return device for the cleaned liquid, the Suction device and the return device each have an inlet on the suction side and both inlets are connected to an air-containing vacuum chamber to be evacuated by the suction device, into which the suction connection opens, and the return device is also provided in the flow path of the liquid after the wet filter.

Durch die GB-A-1 336 117 ist ein Reinigungsgerät zur Reinigung der Kühlflüssigkeit von Werkzeugmaschinen bekanntgeworden, bei welchem ein liegender Kessel in zwei Kammern, nämlich eine Filterkammer und eine Speicherkammer für die gereinigte Flüssigkeit unterteilt ist. Oberhalb des Flüssigkeitsspiegels ist an die Speicherkammer der saugseitige Einlaß eines Sauggebläses angeschlossen, das über eine die Zwischenwand zwischen den beiden Kammern durchsetzende Rohrleitung indirekt auch mit der Filterkammer verbunden ist. Unterhalb dieser Rohrleitung sind die beiden Kammern über ein Rückschlagventil so miteinander verbunden, daß gereinigte Flüssigkeit nur von der Filterkammer in die Speicherkammer gelangen kann. In die Speicherkammer ragt das untere Ende des Saugrohres einer Wasserpumpe, das einen Pumprotor aufnimmt, welcher außerhalb des Kessels mit einem Motor antriebsverbunden ist.GB-A-1 336 117 has disclosed a cleaning device for cleaning the cooling liquid of machine tools, in which a horizontal boiler is divided into two chambers, namely a filter chamber and a storage chamber for the cleaned liquid. Above the liquid level, the suction-side inlet of a suction blower is connected to the storage chamber and is indirectly connected to the filter chamber via a pipeline passing through the intermediate wall between the two chambers. Below this pipeline, the two chambers are connected to one another via a check valve so that cleaned liquid can only get from the filter chamber into the storage chamber. The lower end of the suction pipe of a water pump protrudes into the storage chamber, which receives a pump rotor which is connected to a motor outside the boiler.

Dadurch, daß der saugseitige Einlaß, der zur Evakuierung des Kessels dient, in die Speicherkammer mündet, befindet sich dieser Einlaß verhältnismäßig weit vom Naßfilter und vom Sauganschluß für die zu reinigende Flüssigkeit entfernt, wobei dieser saugseitige Einlaß außerdem der Filteraustrittsseite des Naßfilters nachgeordnet ist. Dadurch ergibt sich ein verhältnismäßig schlechter Wirkungsgrad, eine raumaufwendige Bauweise sowie nur ein verzögertes Ansprechen der Saugwirkung bei Inbetriebnahme.Characterized in that the suction-side inlet, which serves to evacuate the boiler, opens into the storage chamber, this inlet is located relatively far from the wet filter and from the suction port for the liquid to be cleaned, this suction-side inlet also being arranged downstream of the filter outlet side of the wet filter. This results in a relatively poor efficiency, a space-consuming construction and only a delayed response of the suction effect when commissioning.

Der Erfindung liegt die Aufgabe zu Grunde, ein Reinigungsgerät der eingangs genannten Art zu schaffen, welches auch bei kompakter Bauweise eine hohe Leistung und eine geringe Störanfälligkeit aufweist.The invention is based on the object of providing a cleaning device of the type mentioned at the outset which, even with a compact design, has high performance and low susceptibility to failure.

Diese Aufgabe wird bei einem Reinigungsgerät der genannten Art gemäß der Erfindung dadurch gelöst, daß der saugseitige Einlaß der Saugeinrichtung der Filtereintrittsseite des Naßfilters zugeordnet ist. Dadurch braucht die Saugeinrichtung die zu reinigende Flüssigkeit nicht durch den Naßfilter hindurch anzusaugen, so daß sie praktisch unabhängig von dessen Verschmutzungsgrad arbeitet und bei Inbetriebnahme sehr schnell ein ausreichend hohes Vakuum in der Unterdruckkammer erzeugt. Dadurch wird auch die Saugeinrichtung geschont. Da das verschmutzte Wasser, ohne daß es irgendwelche beweglichen Maschinenteile passieren muß, mit hoher Literleistung angesaugt und dann einem ggf. sehr großflächigen Filter zugeführt wird, kann der Naßfilter durch die erfindungsgemäße Ausbildung ohne Beeinträchtigung des Durchsatzes auf eine sehr feine Filtrierung eingestellt sein. Die Rückführeinrichtung wird nur dem gefilterten Wasser ausgesetzt, so daß sie keinen Störungen oder Beschädigungen durch Schmutz unterworfen ist.This object is achieved in a cleaning device of the type mentioned according to the invention in that the suction-side inlet of the suction device is assigned to the filter inlet side of the wet filter. As a result, the suction device does not need to suck the liquid to be cleaned through the wet filter, so that it works practically irrespective of its degree of soiling and very quickly creates a sufficiently high vacuum in the vacuum chamber when it is started up. This also protects the suction device. Since the contaminated water is sucked in with a high liter output without having to pass through any moving machine parts and then fed to a possibly very large-area filter, the wet filter can be set to a very fine filtration by the design according to the invention without impairing the throughput. The return device is only exposed to the filtered water, so that it is not subject to interference or damage from dirt.

Das erfindungsgemäße Reinigungsgerät eignet sich insbesondere für Schwimmbäder oder dgl.. Zum Reinigen von Schwimmbädern, insbesondere des Bodens von Schwimmbädern, werden hauptsächlich zwei unterschiedliche Gerätetypen verwendet. Der Gerätetyp der obengenannten Art weist in der Regel einen durch einen Elektromotor angetriebenen, selbstfahrenden Läufer auf, der den Boden des Schwimmbades abfährt und dabei über eine Pumpe Wasser mit gelöstem Schmutz ansaugt, durch einen druck- bzw. auslaßseitigen Naßfilter in Form beispielsweise eines Filtersakkes drückt und dabei das gefilterte Wasser wieder an das Schwimmbad zurückführt. Die Pumpe ist bei diesen Geräten sowohl Bestandteil der Saugeinrichtung als auch der Rückführeinrichtung für die gereinigte Flüssigkeit. Diese Geräte sind verhältnismäßig schwierig einzusetzen und vor allem nicht einfach wieder aus dem Schwimmbad zu bergen und haben des weiteren den Nachteil, daß sie zur Reinigung eines Schwimmbeckens eine sehr hohe relative Einsatzdauer benötigen. Beim Herausheben des Gerätes aus dem Schwimmbecken fließt häufig ungefiltertes, besonders stark durch Schmutz angereichertes Wasser durch Rückfluß aus dem Gerät aus und zurück in das Schwimmbecken.The cleaning device according to the invention is particularly suitable for swimming pools or the like. For cleaning swimming pools, in particular the bottom of swimming pools, two different types of devices are mainly used. The type of device of the type mentioned above usually has a self-propelled rotor driven by an electric motor, which runs off the bottom of the swimming pool and sucks in water with loosened dirt via a pump and presses it through a pressure or outlet-side wet filter in the form of, for example, a filter bag and return the filtered water back to the swimming pool. In these devices, the pump is both a component of the suction device and the return device for the cleaned liquid. These devices are relatively difficult to use and, above all, not easy to recover from the swimming pool and have the further disadvantage that they require a very long relative operating time to clean a swimming pool. When the device is lifted out of the swimming pool, unfiltered, particularly heavily contaminated water often flows out of the device and back into the swimming pool.

Der andere Gerätetyp weist in der Regel eine mit einem Stab oder Rohr zu führende Saugdüse auf, welche über einen Schlauch an die Oberflächenabsaugung des Schwimmbades, nämlich den sog. "Skimmer", angeschlossen wird. Der angesaugte Schmutz wird dabei in dem dem Schwimmbecken stationär zugeordneten Schwimmbadfilter zurückgehalten, was zu einer sehr schnellen Verschmutzung, beispielsweise mit Blättern, des Filters führt. Ferner ergeben sich recht hohe Rückspülverluste des Schwimmbadwassers, weil diese Filter durch Rückspülung und Abführung des Rückspülwassers gereinigt werden müssen. Der bei der Schwimmbadreinigung anfallende grobe Schmutz führt des weiteren zu einer unhygienischen Verunreinigung des ständig in Kommunikation mit dem Schwimmbadwasser stehenden Schwimmbadfilters.The other type of device generally has a suction nozzle which can be guided with a rod or tube and which is connected via a hose to the surface suction of the swimming pool, namely the so-called “skimmer”. The sucked-in dirt is retained in the swimming pool filter stationary associated with the swimming pool, which leads to very rapid contamination, for example with leaves, of the filter. Furthermore, there are very high backwash losses in the swimming pool water because these filters have to be cleaned by backwashing and removing the backwash water. The coarse dirt accumulating when cleaning the swimming pool also leads to unsanitary contamination of the swimming pool filter, which is constantly in communication with the swimming pool water.

Schließlich sind auch sog. Industrie-Schmutzsauger bekannt, welche außer für trockenen Schmutz auch für Flüssigkeiten eingesetzt werden können. Derartige Schmutzsauger saugen jedoch die Flüssigkeit in einen zu entleerenden Kessel an, dessen Kapazität naturgemäß sehr beschränkt ist, auch wenn ein zusätzlicher Wasservorabscheider zwischengeschaltet wird.Finally, so-called industrial vacuum cleaners are also known, which can also be used for liquids in addition to dry dirt. Such vacuum cleaners, however, suck the liquid into a boiler to be emptied, the capacity of which is naturally very limited, even if an additional water pre-separator is interposed.

Es ist denkbar, den Sauganschluß des Gerätes bzw. die im Schwimmbad zur Absaugung zu bewegende Saugdüse bis zum Aufbau eines hinreichenden Unterdruckes in der Unterdruckkammer, beispielsweise durch Zuhalten mit einer Hand, zu verschließen. Bei größeren Geräten ist es jedoch vorteilhaft, wenn gemäß einem weiteren Merkmal der Erfindung zwischen der Saugseite und dem Druckanschluß der Rückführeinrichtung ein bei auslaßseitigem Überdruck schließendes Rückschlagventil, insbesondere ein in einer Druckleitung liegendes Klappenventil, vorgesehen ist, so daß die Rückführeinrichtung stets gegen den Unterdruck in der Unterdruckkammer arbeitet und dadurch bei der Aufrechterhaltung des Unterdrukkes mitwirkt oder sogar alleine diesen Unterdruck erzeugt bzw. wenigstens aufrechterhält.It is conceivable to close the suction connection of the device or the suction nozzle to be moved in the swimming pool for suction until a sufficient negative pressure builds up in the negative pressure chamber, for example by locking with one hand. For larger devices, however, it is advantageous if, according to a further feature of the invention, between the suction side and the pressure connection of the return device, a check valve which closes on the outlet side excess pressure, in particular a flap valve located in a pressure line, is provided, so that the return device always counteracts the negative pressure in the vacuum chamber works and thereby participates in the maintenance of the vacuum or even alone generates this vacuum or at least maintains it.

Eine sehr kompakte Bauweise des Erfindungsgegenstandes ergibt sich, wenn die Saugöffnung der Rückführeinrichtung und die Unterdruckkammer in einer gemeinsamen Hauptkammer, insbesondere einem aufgrund seiner Höhenerstreckung aufrechtstehenden Kessel, übereinander vorgesehen sind, wobei insbesondere die Unterdruckkammer durch den druckdichten Raum oberhalb des Flüssigkeitsspiegels eines Flüssigkeits-Zwischenspeichers in der Hauptkammer gebildet ist. Durch den Zwischenspeicher kann auf einfache Weise vermieden werden, daß die Rückführeinrichtung trockenläuft, wenngleich auch eine Pumpevorgesehen sein kann, die gute Trockenlaufeigenschaften aufweist. Da der Zwischenspeicher mit der Unterdruckkammer kommuniziert, wird beim Absaugen von gefiltertem Wasser aus dem Zwischenspeicher der Unterdruck in der Unterdruckkammer und somit die Saugleistung der Saugeinrichtung entsprechend erhöht.A very compact design of the subject matter of the invention is obtained if the suction opening of the return device and the vacuum chamber are provided one above the other in a common main chamber, in particular a boiler standing upright due to its vertical extension, the vacuum chamber in particular due to the pressure-tight space above the liquid level of a liquid intermediate store in the main chamber is formed. The intermediate store can be used in a simple manner to prevent the return device from running dry, although a pump can also be provided which has good dry-running properties. Since the intermediate store communicates with the vacuum chamber, when vacuuming filtered water from the intermediate store, the negative pressure in the vacuum chamber and thus the suction power of the suction device are increased accordingly.

Es hat sich als vorteilhaft erwiesen, die Saugeinrichtung und die Rückführeinrichtung durch gesonderte Aggregate zu bilden, die vorzugsweise von gesonderten Motoren, beispielsweise Elektromotoren, angetrieben sind. Dadurch ist es ohne mechanische Antriebsverbindungen zwischen den beiden Einrichtungen möglich, deren Förderleistungen je nach den Erfordernissen genau aufeinander abzustimmen. Es ist aber auch denkbar, die beiden Einrichtungen durch eine selbstansaugende Wasserpumpe zu bilden oder die beiden Einrichtungen baulich so zu vereinen, daß ein einziger Motor sowohl einen Sauglüfter wie auch eine Pumpe antreibt, wobei die Saugöffnung des Sauglüfters dann in die Unterdruckkammer und die Saugöffnung der Pumpe in den Zwischenspeicher mündet, der auch durch einen von der Unterdruckkammer gesonderten Behälter gebildet sein kann. Besonders zweckmäßig ist es jedoch, wenn ein gesonderter Motor-Sauglüfter und eine Motor-Pumpe jeweils für sich mit dem Kessel baulich vereint sind.It has proven to be advantageous to form the suction device and the feedback device by separate units, which are preferably driven by separate motors, for example electric motors. As a result, it is possible without mechanical drive connections between the two devices to precisely match their conveying capacities to one another depending on the requirements. But it is also conceivable to form the two devices by means of a self-priming water pump or to combine the two devices structurally so that a single motor drives both a suction fan and a pump, the suction opening of the suction fan then entering the vacuum chamber and the suction opening of the Pump opens into the intermediate store, which can also be formed by a separate container from the vacuum chamber. However, it is particularly expedient if a separate motor suction fan and a motor pump are each structurally combined with the boiler.

Die Pumpe kann in einfacher Weise in Form beispielsweise einer Tauchpumpe unterhalb der Unterdruckkammer, vorzugsweise auf dem Boden der Hauptkammer, angeordnet sein, so daß sie zu einer tiefen Lage des Schwerpunktes des Reinigungsgerätes beiträgt. Zweckmäßig liegt minestens eine Saugöffnung in unmittelbarer Bodennähe und ist die Druckleitung druckdicht aus der Hauptkammer herausgeführt, so daß Unterdruckverluste in der Unterdruckkammer vermieden sind und der Zwischenspeicher wenigstens nahezu vollständig durch die Pumpe entleert werden kann.The pump can be arranged in a simple manner, for example in the form of a submersible pump, below the vacuum chamber, preferably on the bottom of the main chamber, so that it contributes to a low position of the center of gravity of the cleaning device. At least one suction opening is expediently located in the immediate vicinity of the floor and the pressure line is led out of the main chamber in a pressure-tight manner, so that negative pressure losses in the negative pressure chamber are avoided and the intermediate store can be at least almost completely emptied by the pump.

Die Förderleistungen der Saugeinrichtung und der Rückführeinrichtung können in besonders einfacher Weise dadurch aufeinander abgestimmt werden, daß die Rückführeinrichtung in Abhängigkeitvom Flüssigkeitsstand im Reinigungsgerät, vorzugsweise mit einem Schwimmerschalter, gesteuert ist. Ist die Rückführeinrichtung so auf die Saugeinrichtung abgestimmt, daß der Naßfilter oberhalb des höchsten Flüssigkeitsspiegels liegt, so kann das Wasser den Naßfilter ungehindert durchströmen, und außerdem wird vermieden, daß durch das gefilterte Wasser der im Naßfilter zurückgehaltene Schmutz aufgeschlämmt wird. Die Pumpe ist zweckmäßig so ausgelegt, daß sie eine etwas höhere Förderleistung hat als der Sauglüfter, so daß sie während des Betriebs mehrfach automatisch, nämlich beispielsweise durch den Schwimmerschalter, ausgeschaltet wird. Während die Pumpe nicht fördert, wird eine Rücksaugung über den Auslaß der Rückführeinrichtung durch das genannte Rückschlagventil verhindert.The delivery rates of the suction device and the feedback device can be coordinated with one another in a particularly simple manner in that the feedback device is controlled as a function of the liquid level in the cleaning device, preferably with a float switch. If the return device is matched to the suction device in such a way that the wet filter lies above the highest liquid level, the water can flow through the wet filter unhindered, and in addition it is avoided that the dirt retained in the wet filter is suspended by the filtered water. The pump is expediently designed in such a way that it has a somewhat higher delivery capacity than the suction fan, so that it is switched off automatically several times during operation, for example by the float switch. While the pump is not delivering, a return suction via the outlet of the return device is prevented by the check valve mentioned.

Eine besonders vorteilhafte Weiterbildung des Erfindungsgegenstandes besteht darin, daß die Saugeinrichtung an der Oberseite der Unterdruckkammer angeordnet ist und vorzugsweise mit der Saugseite den Naßfilter und/oder die Unterdruckkammer an einer oberen Öffnung lösbar verschließt, wobei insbesondere die Saugeinrichtung einen Kesseldeckel und/oder eine Ringklemmung für den Naßfilterbildet. Dadurch kann die Saugeinrichtung als Saugkopf bzw. Kesseldeckel auch auf einen anderen, keine Rückführeinrichtung, sondern als Zwischenspeicher einen Sammelbehälter für Staub aufweisenden Kessel aufgesetzt werden und mit diesem somit einen Staub- oder Feuchtsauger hoher Leistung bilden. Der in diesen Kessel führende Saugstutzen mündet in diesem Fall so in den Kessel, daß zwischen seiner Mündung und der Saugseite der Saugeinrichtung der Filter bzw. Filtersack liegt, so daß die Saugeinrichtung nicht von Schmutz durchströmt wird.A particularly advantageous development of the subject matter of the invention is that the suction device is arranged on the upper side of the vacuum chamber and preferably detachably closes the wet filter and / or the vacuum chamber at an upper opening with the suction side, in particular the suction device providing a boiler lid and / or a ring clamp for forms the wet filter. As a result, the suction device can also be placed as a suction head or boiler lid on another, not a return device, but rather as a buffer tank for dust-containing boilers and thus form a high-performance vacuum or wet vacuum cleaner. In this case, the suction nozzle leading into this boiler opens into the boiler such that the filter or filter bag lies between its mouth and the suction side of the suction device, so that dirt does not flow through the suction device.

Bei dem erfindungsgemäßen Reinigungsgerät für Schwimmbäder mündet der Sauganschluß zweckmäßig unterhalb der Saugeinrichtung, insbesondere schräg nach unten gerichtet, in die Unterdruckkammer, wobei er vorzugsweise durch einen radial in die Kesselwand eingesetzten Stutzen gebildet ist, so daß sich praktisch keine Gefahr ergibt, daß Wasser in die Saugeinrichtung angesaugt wird. Sowohl die Saugeinrichtung als auch die Rückführeinrichtung arbeiten somit in unverschmutztem Medium, nämlich die Saugeinrichtung mit Luft und die Rückführeinrichtung mit gefiltertem Wasser.In the cleaning device according to the invention for swimming pools, the suction connection expediently opens below the suction device, in particular directed obliquely downwards, into the vacuum chamber, wherein it is preferably formed by a nozzle inserted radially into the boiler wall, so that there is practically no risk of water entering the Suction device is sucked. Both the suction device and the return device thus work in unpolluted medium, namely the suction device with air and the return device with filtered water.

Das Eindringen von Wasser in die Saugeinrichtung kann selbst unter ungünstigen Umständen dadurch völlig ausgeschlossen werden, daß der Saugöffnung der Saugeinrichtung ein Schwimmerventil zugeordnet ist, das vorzugsweise einen in der Kesselachse stehenden Schwimmer aufweist, der in einem in den Naßfilter eingreifenden und mit der Saugeinrichtung baulich vereinten Stützkäfig oder dgl. für den Naßfilter geführt ist und insbesondere in Ausgangslage mit seinem Ventilschließglied etwa in Höhe des zu seinem Umfang benachbarten Sauganschlusses liegt. Durch entsprechend leichtgewichtige und großvolumige Ausbildung des Schwimmers spricht dieser selbst auf geringe Wassermengen schnell an. Dadurch, daß für den Naßfilter ein Stützkäfig vorgesehen ist, dann dieser trotz des Unterdrukkes auf einfache Weise in großflächiger Ausbreitung gehalten werden. Bildet dieser Stützkäfig einen Bestandteil des Kesseldeckels, so ist er auch bei Verwendung eines anderen Kessels wirksam.The penetration of water into the suction device can be completely ruled out even under unfavorable circumstances that the Suction opening of the suction device is assigned a float valve, which preferably has a float standing in the axis of the boiler, which is guided in a support cage or the like for the wet filter, which engages in the wet filter and is structurally combined with the suction device, and in particular in the initial position with its valve closing member at approximately the height of the suction port adjacent to its circumference. Due to the correspondingly lightweight and large-volume design of the float, the swimmer responds quickly even to small amounts of water. The fact that a support cage is provided for the wet filter, then this can be kept in a simple manner in a wide area despite the low pressure. If this support cage forms part of the boiler lid, it is also effective when another boiler is used.

Damit der Naßfilter, ohne die Gefahr zu reißen, mit besonders großen Wassermengen unter hohem Druck beaufschlagt werden kann, ist für die Aufnahme des, insbesondere auswechselbaren bzw. als Wegwerffilter ausgebildeten, Naßfilters ein Filtergehäuse in Form vorzugsweise eines beschichteten Textilmantels mit einem formstabilen, perforierten Boden, beispielsweise einer Lochplatte, vorgesehen, das insbesondere eine seitliche Öffnung für den abgedichteten Durchgriff des Sauganschlusses aufweist. Durch dieses Filtergehäuse, das beispielsweise mit einem gummiartigen Kunststoff beschichtet ist und Netzcharakter aufweist, wird der Naßfilter gegen das auftreffende verschmutzte Wasser abgestützt.So that the wet filter can be subjected to particularly large amounts of water under high pressure without the risk of tearing, a filter housing in the form of, preferably, a coated textile jacket with a dimensionally stable, perforated base is required to hold the, particularly replaceable or designed as a disposable filter , for example a perforated plate, is provided, which in particular has a lateral opening for the sealed passage through the suction connection. This filter housing, which is coated, for example, with a rubber-like plastic and is network-like, supports the wet filter against the impinging contaminated water.

Ist der Naßfilter mit Schmutz gefüllt, so kann er als diesen Schmutz aufnehmender Behälter in einfacher Weise aus dem Reinigungsgerät entnommen, einschließlich des Schmutzes weggeworfen und durch einen neuen Naßfilter ersetzt werden.If the wet filter is filled with dirt, it can be removed from the cleaning device in a simple manner as a container holding this dirt, including the dirt thrown away and replaced by a new wet filter.

Zur weiteren Erleichterung des Auswechselns des Naßfilters ist dieser durch Klemmung seines oberen, nach außen gestülpten Randes gegen einen die Oberseite der Unterdruckkammer abdichtenden Profilring befestigt, der vorzugsweise das Filtergehäuse trägt und/oder von oben nach unten mehrfach radial nach innen abgestuft ist. Wird der Kesseldeckel bzw. die Saugeinrichtung vom Kessel entfernt, so liegt dadurch der Naßfilter frei zugänglich zum Entnahmen.To further facilitate the replacement of the wet filter, it is fastened by clamping its upper, turned-out edge against a profile ring which seals the upper side of the vacuum chamber and which preferably carries the filter housing and / or is stepped radially inward from top to bottom several times. If the boiler lid or the suction device is removed from the boiler, the wet filter is thus freely accessible for removal.

Es ist zwar denkbar, die Mobilität des Gerätes dadurch zu erreichen, daß es derart schwimmfähig ist, daß der Sauglüfter nicht mit Wasser in Berühung kommt bzw. oberhalb des Wasserspiegels liegt und somit das Reinigungsgerät durch Schwimmen im Schwimmbecken beliebig bewegt werden kann. Besonders vorteilhaft ist es jedoch, wenn das Reinigungsgerät ein Fahrgestell aufweist, das vorzugsweise mit selbstlenkenden Nachlaufrädern versehen ist, so daß es außerhalb des Schwimmbeckens um dieses herum gefahren bzw. mit einem an seinen Ansauganschluß angeschlossenen Saugschlauch nachgezogen werden kann. An den Auslaß der Rückführeinrichtung ist dabei zweckmäßig ein Sinkschlauch angeschlossen, dessen auslaßseitiges Ende unterhalb des Wasserspiegels im Schwimmbecken liegt.It is conceivable to achieve the mobility of the device in that it is buoyant in such a way that the suction fan does not come into contact with water or is above the water level and the cleaning device can thus be moved as desired by swimming in the swimming pool. However, it is particularly advantageous if the cleaning device has a chassis, which is preferably provided with self-steering trailing wheels, so that it can be driven around the outside of the swimming pool or retightened with a suction hose connected to its suction connection. A sink hose is expediently connected to the outlet of the return device, the outlet-side end of which lies below the water level in the swimming pool.

Die Erfindung betrifft des weiteren einen Naßfilter für ein Reinigungsgerät der beschriebenen Art, welcher - in Form eines Filtersackes oder dgl. aus einem Papierflies mit hoher hydraulischer Durchlässigkeit - im Mantel eine Durchstecköffnung für den Sauganschluß aufweist, die vorzugsweise durch eine an seiner Innenseite befestigte, eine elastisch begrenzte Durchtrittsöffnung für den Sauganschluß aufweisende Manschette in Form beispielsweise einer flächigen, flexiblen Verstärkung gebildet ist. Der Filtersack bzw. das Papierflies ist feuchtigkeitsbeständig gebunden. Nach dem Einsetzen in das Filtergehäuse wird der Filtersack mit seiner Durchstekköffnung über den Saugstutzen der Saugeinrichtung geschoben, so daß dessen Mündung im Innern des Filtersackes liegt. Durch die elastische Verstärkung ergibt sich dabei ein sehr sicherer Halt und eine gute Abdichtung. Die Verstärkung kann beispielsweise durch eine Nähnaht an dem Papierflies befestigt sein.The invention further relates to a wet filter for a cleaning device of the type described, which - in the form of a filter bag or the like. From a paper fleece with high hydraulic permeability - has a push-through opening in the jacket for the suction connection, which is preferably attached by one on its inside, one elastically limited passage opening for the cuff having suction connection is formed in the form of, for example, a flat, flexible reinforcement. The filter bag or paper tile is bound to be moisture-resistant. After insertion into the filter housing, the filter bag with its through opening is pushed over the suction nozzle of the suction device, so that its mouth lies inside the filter bag. The elastic reinforcement results in a very secure hold and a good seal. The reinforcement can be attached to the paper tile, for example, by a sewing seam.

Die Erfindung wird im folgenden mit weiteren Einzelheiten an Hand des in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. Es sind dargestellt in

  • Fig. 1 ein erfindungsgemäßes Reinigungsgerät in perspektivischer, teilweise aufgeschnittener Darstellung,
  • Fig. 2 die Saug- und Filtereinrichtung des Gerätes gemäß Fig. 1 in einer perspektivischen Explosionsdarstellung und
  • Fig. 3 ein oberer Abschnitt des Reinigungsgerätes gemäß Fig. 1 im Axialschnitt.
The invention is explained in more detail below with further details using the exemplary embodiment shown in the drawings. They are shown in
  • 1 is a cleaning device according to the invention in a perspective, partially cutaway view,
  • Fig. 2 shows the suction and filter device of the device of FIG. 1 in a perspective exploded view and
  • Fig. 3 is an upper section of the cleaning device according to FIG. 1 in axial section.

Wie die Figuren 1 bis 3 zeigen, weist ein erfindungsgemäßes Reinigungsgerät einen dünnwandigen zylindrischen und aufrechtstehenden Kessel 1 auf, dessen unteres Ende mit einem einstückig mit dem Kesselmantel verbundenen Boden 2 verschlossen ist, während die obere, der lichten Weite des Kesselmantels 3 entsprechende Öffnung des Kessels 1 mit einem lösbaren Kesseldeckel 4 verschlossen ist. Der Kessel 1, dessen Höhe etwa doppelt so groß wie sein Durchmesser ist, umschließt eine über ihre Höhe durchgehend gleiche Querschnitte aufweisende Hauptkammer 5, welche in ihrem oberen, höheren Bereich eine Luft enthaltende Unterdruckkammer 6 und im unteren, beispielsweise etwa ein Drittel der Gesamthöhe der Hauptkammer 5 einnehmenden Bereich einen Flüssigkeits-Zwischenspeicher 7 bildet. Im oberen Bereich sind an der Außenseite des Kesselmantels 3 zwei einander diametral gegenüberliegende Henkelgriffe 8 zum Tragen des Reinigungsgerätes vorgesehen. Das Reinigungsgerät ist im dargestellten Ausführungsbeispiel auf einem vierrädrigen Fahrgestell 9 angeordnet, das nach Art einer Schubkarre ausgebildet ist, und ein tief, d.h. mit geringem Abstand oberhalb der Laufebene liegendes Standchassis 10 aufweist, auf dessen ringförmigem Boden der Kessel 1 mit seinem Boden versenkt und heraushebbar steht, wobei das Standchassis 10 eine mehrfach in der Höhe wechselnde Außenwandung aufweist, welche unmittelbar benachbart zur Außenseite des Kesselmantels 3 liegt, so daß der Kessel 1 gegenüber dem Standchassis 10 zentriert und gegen seitliches Verrutschen gesichert ist. Zwei an der Vorderseite liegende Räder des Fahrgestelles 9 sind als selbstlenkende Nachlaufräder 11 nach Art von Möbelrollen ausgebildet, die vollständig unterhalb der Unterseite des Standchassis 10 liegen. Die beiden anderen, im Durchmesser wesentlich größeren und an der Rückseite des Fahrgestelles 9 in einer gemeinsamen Achse liegenden Räder 12 liegen außenseitig an den voneinander abgekehrten Seiten des Standchassis 10, wobei ihre Achse höher als die Unterseite des Standchassis 10 vorgesehen ist, wodurch ein sehr gutes Laufverhalten erreicht wird. An der Rückseite ist das Fahrgestell 9 mit einem annähernd U-förmigem Bügelgriff 13 versehen, dessen nach unten gerichtete Schenkel in entsprechenden Wandungsansätzen des Standchassis 10 befestigt sind und dessen oben horizontal liegender Griffquersteg etwa in Höhe des oberen Endes des Kesselmantels 3 und mit Abstand von dessen Außenumfang vorgesehen ist. Dadurch kann das Reinigungsgerät mit dem Fahrgestell 9 um die Achse der Räder 12 nach hinten in eine Schräglage gekippt und ohne Bodenberührung der Nachlaufräder (11) auf den großen Rädern 12 auch über nicht besonders ebene Laufflächen leicht und schnell transportiert werden.As FIGS. 1 to 3 show, a cleaning device according to the invention has a thin-walled cylindrical and upright boiler 1, the lower end of which is closed by a bottom 2 which is integrally connected to the boiler shell, while the upper opening of the boiler corresponding to the inside width of the boiler shell 3 1 is closed with a detachable boiler lid 4. The boiler 1, the height of which is approximately twice as large as its diameter, encloses a main chamber 5 which has the same cross-sections throughout its height and which has an air-containing vacuum chamber 6 in its upper, higher region and, for example, approximately one third of the total height of the lower chamber Main chamber 5 area forms a liquid buffer 7. In the upper area, two diametrically opposite handles 8 are provided on the outside of the boiler shell 3 for carrying the cleaning device. The cleaning device is arranged in the illustrated embodiment on a four-wheel chassis 9, which is designed in the manner of a wheelbarrow, and has a standing chassis 10 deep, ie at a short distance above the running level, on the annular bottom of which the boiler 1 is sunk with its bottom and can be lifted out stands, with the stand chassis 10 an outer wall changing several times in height dung, which is immediately adjacent to the outside of the boiler shell 3, so that the boiler 1 is centered relative to the stand chassis 10 and secured against lateral slipping. Two wheels of the chassis 9 lying on the front are designed as self-steering trailing wheels 11 in the manner of furniture casters, which lie completely below the underside of the stand chassis 10. The other two wheels 12, which are much larger in diameter and are located on the back of the chassis 9 in a common axis, lie on the outside on the opposite sides of the stand chassis 10, their axis being provided higher than the underside of the stand chassis 10, which makes a very good one Running behavior is achieved. At the back of the chassis 9 is provided with an approximately U-shaped bow handle 13, the downward legs of which are fastened in corresponding wall projections of the base chassis 10 and the horizontal handle cross bar located above at the height of the upper end of the boiler shell 3 and at a distance from it External circumference is provided. As a result, the cleaning device with the chassis 9 can be tilted backward into an inclined position about the axis of the wheels 12 and can be easily and quickly transported on the large wheels 12 without the ground wheels of the trailing wheels (11) touching even not particularly flat treads.

Der Kesseldeckel 4 ist baulich mit einer elektromotorisch zu betreibenden Saugeinrichtung 14 vereinigt, die im wesentlichen achsgleich zum Kessel angeordnet und ausgebildet ist. Die Saugeinrichtung 14 weist einen den oberen Rand des Kesselmantels 3 außen und innen umgreifenden Klemmring 15 auf, der als Hauptträger für die gesamte Saugeinrichtung 14 dient und der in einer zentralen, versenkten sowie in den Kesselmantel 3 eingreifenden Flanschnabe 16 einen im wesentlichen achssymmetrischen Sauglüfter 17 trägt, dessen Lüftergebläse 18 unten und dessen im Durchmesser demgegenüber verringerter Elektromotor 19 an der Oberseite liegt. Auf dem Klemmring 15 ist über nicht näher dargestellte Distanzglieder mit Höhenabstand unter Zwischenlage eines Zwischenringes 20 eine Abdeckkappe 21 befestigt, wobei der Sauglüfter 17 unter Zwischenlage von Zentrierringen 22 und einem Dämpfring 23 zwischen dem Klemmring 15 und der Abdeckkappe 21 zentriert eingespannt ist. Im Bereich der Ringlücke zwischen der Oberseite des Klemmringes 15 und der Unterseite des scheibenförmigen Zwischenringes 20 sind die im oberen Bereich des Lüftergebläses 18 liegenden Ausblasöffnungen 24 von einem Filterring 25 umgeben, der ebenfalls zwischen dem Klemmring 15 und dem Zwischenring 20 zentriert eingespannt ist. Die Saugöffnung 26 bzw. die Saugöffnungen des Lüftergebläses 18 liegen an dessen unterer Stirnseite im wesentlichen symmetrisch zur Mittelchase des Reinigungsgerätes. Am Umfang der Abdeckkappe 21 ist der zum Ein- und Ausschalten des Sauglüfters 17 dienende Schalter 27, ggf. eine Kontroll-Leuchte, und die Kabelzuführung für das Netzkabel vorgesehen. Im Innern der Abdeckkappe 21 liegen geschützt die zugehörigen elektrischen Schaltungen. An der Oberseite der Abdeckkappe 21 ist eine einen Bügelgriff bildende Griffkappe 28 befestigt, an welcher die gesamte Saugeinrichtung 14 getragen bzw. gehalten werden kann. Zum abgedichteten Festspannen der Saugeinrichtung 14 gegen die obere Kesselstirnseite sind am Außenumfang des Kessels 1 zwei einander diametral gegenüber-und jeweils oberhalb der Henkelgriffe 8 liegende Bügelspanner in Form beispielsweise aus Draht geformter Exzenterklammern befestigt, welche in der Freigabestellung mit ihren oberen, hakenförmig zur Mittelachse des Kessels 1 hin abgewinkelten Enden über die obere ringförmige Stirnfläche des Klemmringes 15 bewegt und dann durch Niederdrücken von Handhaben federnd gegen diese obere Stirnfläche gespannt werden können, so daß der Klemmring 15 unter Zwischenlage eines Dichtringes 30 straff gegen die obere Stirnfläche des Kesselmantels 3 gespannt wird.The boiler cover 4 is structurally combined with a suction device 14 to be operated by an electric motor, which suction device 14 is arranged and designed essentially coaxially with the boiler. The suction device 14 has a clamping ring 15 which surrounds the upper edge of the boiler shell 3 on the outside and inside, which serves as the main support for the entire suction device 14 and which carries a substantially axially symmetrical suction fan 17 in a central, recessed flange hub 16 which engages in the boiler shell 3 , whose fan blower 18 is at the bottom and the electric motor 19, on the other hand, which is reduced in diameter, is at the top. A cover cap 21 is fastened on the clamping ring 15 by means of spacers (not shown in detail) with a height spacing with the interposition of an intermediate ring 20, the suction fan 17 being clamped centered between the clamping ring 15 and the cover cap 21 with the interposition of centering rings 22 and a damping ring 23. In the area of the ring gap between the upper side of the clamping ring 15 and the lower side of the disc-shaped intermediate ring 20, the outlet openings 24 located in the upper region of the fan blower 18 are surrounded by a filter ring 25, which is also clamped in a centered manner between the clamping ring 15 and the intermediate ring 20. The suction opening 26 or the suction openings of the fan blower 18 lie on its lower end face essentially symmetrical to the central chase of the cleaning device. On the circumference of the cover cap 21, the switch 27, possibly a control lamp, is used to switch the suction fan 17 on and off, and the cable feed for the mains cable is provided. The associated electrical circuits are protected inside the cover cap 21. On the top of the cover cap 21 is attached a handle cap 28 forming a bow handle, on which the entire suction device 14 can be carried or held. For the sealed clamping of the suction device 14 against the upper end of the boiler, two diametrically opposed bow tensioners in the form of, for example, wire-shaped eccentric clamps are attached to the outer circumference of the boiler 1 and each above the handles 8, which in the release position has its upper, hook-shaped to the central axis of the Boiler 1 angled ends moved over the upper annular end face of the clamping ring 15 and can then be resiliently tensioned against this upper end face by pressing down handles so that the clamping ring 15 is tensioned tightly against the upper end face of the boiler shell 3 with the interposition of a sealing ring 30.

Der in Betriebstellung innerhalb des Kessels 1 in dessen obersten Bereich und in dessen Achse liegenden Saugöffnung 26 des Lüftergebläses 18 ist ein Schwimmerventil 31 zugeordnet, welches bereits bei geringster Flüssigkeitsbeaufschlagung die Saugöffnung 26 gegenüber der Unterdruckkammer 6 verschließt. Das Schwimmerventil 31 weist einen im wesentlichen zylindrischen Schwimmer 32 auf, dessen Durchmesser etwa ein Drittel des Kesseldurchmessers beträgt und an dessen oberer, im Durchmesser geringfügig erweiterter Stirnfläche eine beispielsweise ringförmige Dichtscheibe 33 als Ventilschließteil vorgesehen ist. Der Dichtscheibe 33 ist als Ventilsitz die Unterseite einer unteren ringförmigen Stirnwand 34 der Flanschnabe 16 des Klemmringes 15 zugeordnet, auf deren Oberseite das Lüftergebläse 18 unter Zwischenlage eines Dicht- und Zentrierringes 22 mit Spannung aufsitzt. Der Schwimmer 32 ist in einem aus gebogenen Drahtabschnitten aufgebauten und daher strömendem oder spritzendem Wasser keinen nennenswerten Widerstand entgegensetzenden Stützkäfig 35 geführt, der mit einem oberen Endring zentriert auf den Außenumfang der Stirnwand 34 des Klemmringes 15 gesteckt und dadurch in seiner zur Saugeinrichtung 14 bzw. zum Kessel 1 achsgleichen Lage gesichert ist. Zwischen dem oberen Endring 36 und zwei unteren, konzentrischen Endringen 37, 38 sind aufrechte Drahtabschnitte vorgesehen, von welchen eine gleichmäßig über den Umfang verteilte Gruppe radial weiter außen und die andere, gleichmäßig über den Umfang verteilte Gruppe radial weiter innen liegt. Die innere Gruppe von Drahtabschnitten bildet mit geringem Abstand unterhalb des Endringes 36 durch entsprechende Abkröpfungen Auflageschultern 39, auf welchen der Schwimmer 32 in seiner unteren Ventil-Offenstellung mit der durch seinen oberen erweiterten Endabschnitt gebildeten Ringschulter 40 aufliegt. Das so ausgebildete Schwimmerventil 31 bildet somit einen baulich mit der Saugeinrichtung 14 vereinigten Aggregatteil, der, beispielsweise zum Reinigen des Ventilschließteiles 33, jedoch leicht durch Abziehen von der Saugeinrichtung 14 gelöst werden kann. Der Stützkäfig 35 liegt mit seiner Unterseite nur geringfügig oberhalb der Mitte der Höhe des Kessels 1.In the operating position within the boiler 1 in its uppermost region and in its axis, the suction opening 26 of the fan blower 18 is assigned a float valve 31, which closes the suction opening 26 with respect to the vacuum chamber 6 even with the slightest liquid application. The float valve 31 has an essentially cylindrical float 32, the diameter of which is approximately one third of the boiler diameter and on the upper, slightly enlarged diameter end face, an annular sealing plate 33, for example, is provided as a valve closing part. The sealing disk 33 is assigned as a valve seat the underside of a lower annular end wall 34 of the flange hub 16 of the clamping ring 15, on the upper side of which the fan blower 18 is seated with tension with the interposition of a sealing and centering ring 22. The float 32 is guided in a support cage 35 constructed of bent wire sections and therefore flowing or splashing water with no appreciable resistance, which is centered on the outer circumference of the end wall 34 of the clamping ring 15 and thus inserted in it to the suction device 14 or to Boiler 1 coaxial position is secured. Upright wire sections are provided between the upper end ring 36 and two lower, concentric end rings 37, 38, of which one group evenly distributed over the circumference lies radially further out and the other group uniformly distributed over the circumference lies radially further inside. The inner group of wire sections forms, at a short distance below the end ring 36, by corresponding offsets, support shoulders 39, on which the float 32 rests in its lower valve open position with the ring shoulder 40 formed by its upper extended end section. The float valve 31 thus formed thus forms a structural unit part combined with the suction device 14, which, however, for example for cleaning the valve closing part 33, can easily be detached by pulling it off the suction device 14. The underside of the support cage 35 lies only slightly above the middle of the height of the boiler 1.

Die Unterdruckkammer 6 ist für die Aufnahme eines wasserfesten Filters, insofern eines Naßfilters 41, ausgebildet, der in Form eines flexiblen und im aufgeweiteren Zustand annähernd zylindrischen Filtersackes aus einem Papierflies oder dgl. vorgesehen ist, dessen Weite nur verhältnismäßig geringfügig kleiner als die lichte Weite der Unterdruckkammer 6 ist. Der als Wegwerffilter vorgesehene Naßfilter 41 ist auswechselbar in einem Filtergehäuse anzuordnen, das im wesentlichen durch einen beschichteten, netzartigen Textilmantel 42 und einen an dessen unterem Ende befestigten ebenen perforierten Boden 43 gebildet ist. Im aufgeweiteten Zustand ist der Textilmantel 42 nur geringfügig weiter als der Naßfilter 41 und weniger weit als die lichte Weite der Unterdruckkammer 6. Der kreisscheibenförmige, im wesentlichen über seine gesamte Fläche gleichmäßig perforierte Boden 43 ist mit einem Randbund am unteren Endabschnitt des Textilmantels 42 derart befestigt, daß er in Betriebslage in einer zur Kesselachse rechtwinkligen Ebene liegt. Das obere Ende des Textilmantels 42 ist am Außenumfang des untersten Abschnittes eines im Querschnitt nach oben zweifach radial nach außen abgestuften Profilringes 44 befestigt, der mit seinem obersten Stufenabschnitt radial nach außen übergreifend auf der oberen ringförmigen Stirnfläche des Kesselmantels 3 nach Abnehmen des Kesseldeckels 4 abhebbar aufliegt. Über die obere Stirnfläche dieses Profilringes 44 wird der obere Rand 45 des Naßfilters 41 nach außen gestülpt, so daß er nach dem Befestigen des Kesseldeckels 4 zwischen der oberen Stirnfläche des Profilringes 44 und dem Dichtring 30 abgedichtet durch Klemmung festgehalten ist. Nach Abheben des Kesseldeckels 4 kann der Rand 45 des Naßfilters 41 wieder zurückgestülpt und beispielsweise durch Raffen die obere Öffnung des Naßfilters 41 geschlossen werden, so daß dann der beispielsweise mit Schmutz gefüllte Naßfilter 41 als Sack leicht für sich oder mit dem Filtergehäuse aus der Unterdruckkammer 6 herausgehoben werden kann.The vacuum chamber 6 is designed to hold a waterproof filter, in this respect a wet filter 41, which is provided in the form of a flexible and, in the expanded state, approximately cylindrical filter bag made of a paper sheet or the like, the width of which is only comparatively slightly smaller than the clear width of the Vacuum chamber 6 is. The wet filter 41 provided as a disposable filter is to be arranged interchangeably in a filter housing which is essentially formed by a coated, net-like textile jacket 42 and a flat perforated bottom 43 fastened to its lower end. In the expanded state, the textile jacket 42 is only slightly wider than the wet filter 41 and less wide than the clear width of the vacuum chamber 6. The circular disk-shaped bottom 43, which is substantially uniformly perforated over its entire surface, is fastened in this way with an edge collar at the lower end section of the textile jacket 42 that in the operating position it lies in a plane perpendicular to the boiler axis. The upper end of the textile jacket 42 is fastened to the outer circumference of the lowermost section of a profile ring 44 which is radially outwardly stepped upwards in two sections and which, with its uppermost step section, lies radially overlapping on the upper annular end face of the boiler jacket 3 after the boiler lid 4 has been removed . Over the upper end face of this profile ring 44, the upper edge 45 of the wet filter 41 is slipped outwards, so that it is sealed by clamping after fastening the boiler cover 4 between the upper end face of the profile ring 44 and the sealing ring 30. After lifting the boiler lid 4, the edge 45 of the wet filter 41 can be turned back and the upper opening of the wet filter 41 can be closed, for example, by shirring, so that the wet filter 41, filled with dirt, for example, can then easily be used as a sack or with the filter housing from the vacuum chamber 6 can be lifted out.

Als Sauganschluß 46 ist dem Sauggebläse 14 bzw. der Vakuum- oder Unterdruckkammer 6 ein Stutzen 47 zugeordnet, der mit etwa radialer Achse oberhalb der Hälfte der Höhe des Filtergehäuses in den Kesselmantel 3 eingesetzt ist. Der radial in das Innere der Unterdruckkammer 6 ragende Stutzen 47 bildet mit seinem inneren Ende eine Austrittsöffnung 48, die nach oben und am radial inneren Ende in Richtung zum Schwimmerventil 31 durch entsprechende Gestaltung der Stutzenwandungen abgeschirmt ist. Im dargestellten Ausführungsbeispiel liegt die Austrittsöffnung 48 etwa in einer Ebene, die ungefähr unter einem Winkel von 45° schräg zu der durch sie gehenden Axialebene der Vakuumkammer 6 vorgesehen ist und radidal nach innen geringfügig ansteigt. Dadurch strömt das in den Kessel eintretende Wasser schräg nach unten und zum Naßfilter 41 etwa tangential gerichtet in den Naßfilter ein, so daß kaum die Gefahr besteht, daß Wasser nach oben spritzt und durch die Saugströmung in das Lüftergebläse 18 gerissen wird. Für den am Außenumfang im wesentlichen zylindrischen bzw. zu seinem radial inneren Ende geringfügig konisch verjüngten Stutzen 47 weist der Mantel 42 des Filtergehäuses eine im Durchmesser geringfügig kleinere kreisrunde Öffnung 49 auf, mit welcher der Textilmantel 42 unter Spannung und dadurch sicher sitzend über den Stutzen 47 geschoben wird. Durch Abziehen des Textilmantels 42 vom Stutzen 47 ist das Filtergehäuse frei, aus der Unterdruckkammer 6 in der beschriebenen Weise herausgehoben zu werden. Eine entsprechende Durchtrittsöffnung 50 weist auch der Naßfilter 41 in seinem Mantel auf. Im Bereich dieser Durchtrittsöffnung 50 ist an der Innenseite des Naßfilters 41, beispielsweise durch Nähnähte, eine flächige Verstärkung aus einer gummielastischen Kunststoff-Folie oder dgl. befestigt, die mit einem dem Außenquerschnitt des Stutzens 47 entsprechenden zentralen Loch versehen ist. Im Bereich der Durchtrittsöffnung 50 kann der Naßfilter 41 beispielsweise durch einen kreuzförmigen Trennschnitt mit einer Schnittlänge geöffnet sein, die etwa gleich dem Durchmesser der Durchtrittsöffnung ist, derart, daß die durch die Trennschnitte voneinander gelösten, annähernd dreieckförmigen Lappen 52 beim Aufstecken des Naßfilters 41 auf den Stutzen 47 nach innen durch die Verstärkung 51 geschlagen werden und in den Naßfilter 41 ragen. Die Lappen 52 tragen dadurch zur abgedichteten Anlage des Naßfilters 41 am Umfang des Stutzens 47 bei.As the suction connection 46, the suction blower 14 or the vacuum or vacuum chamber 6 is assigned a nozzle 47, which is inserted into the boiler shell 3 with an approximately radial axis above half the height of the filter housing. The nozzle 47 projecting radially into the interior of the vacuum chamber 6 forms with its inner end an outlet opening 48 which is shielded upwards and at the radially inner end in the direction of the float valve 31 by appropriate design of the nozzle walls. In the exemplary embodiment shown, the outlet opening 48 lies approximately in a plane which is provided approximately at an angle of 45 ° to the axial plane of the vacuum chamber 6 passing through it and rises slightly radially inwards. As a result, the water entering the boiler flows obliquely downward and approximately tangentially directed into the wet filter to the wet filter 41, so that there is hardly any risk that water will splash up and be torn into the fan blower 18 by the suction flow. For the socket 47, which is essentially cylindrical on the outer circumference or slightly conically tapered towards its radially inner end, the jacket 42 of the filter housing has a slightly smaller circular opening 49 with which the textile jacket 42 is under tension and thus sits securely over the socket 47 is pushed. By removing the textile jacket 42 from the nozzle 47, the filter housing is free to be lifted out of the vacuum chamber 6 in the manner described. The wet filter 41 also has a corresponding passage opening 50 in its jacket. In the area of this passage opening 50, a flat reinforcement made of a rubber-elastic plastic film or the like is attached to the inside of the wet filter 41, for example by sewing seams, which is provided with a central hole corresponding to the outer cross section of the nozzle 47. In the area of the passage opening 50, the wet filter 41 can be opened, for example, by a cross-shaped separating cut with a cutting length that is approximately equal to the diameter of the passage opening, in such a way that the approximately triangular tabs 52 detached from one another by the separating cuts when the wet filter 41 is fitted onto the Stubs 47 are struck inward by the reinforcement 51 and protrude into the wet filter 41. The tabs 52 thereby contribute to the sealed contact of the wet filter 41 on the circumference of the nozzle 47.

Im Zwischenspeicher 7, und zwar in dessen unterstem Bereich, also unmittelbar in Nähe des Bodens 3, mündet mindestens eine Saugöffnung bzw. münden im dargestellten Ausführungsbeispiel alle Saugöffnungen 54 einer Rückführeinrichtung 53 für das gefilterte Wasser.At least one suction opening or, in the exemplary embodiment shown, all suction openings 54 of a return device 53 for the filtered water open into the intermediate store 7, specifically in its lower region, that is to say in the immediate vicinity of the base 3.

Die Rückführeinrichtung 53 weist eine nach Art einer Tauchpumpe ausgebildete, baulich mit einem Elektromotor 56 vereinte Pumpe 55 auf, an deren Oberseite in achsgleicher Anordnung der Motor 56 befestigt ist und die im unteren Bereich an ihrem Umfang Saugöffnungen 54 aufweist. Die Pumpe 55 ist auf dem Boden 2 stehend im Kessel 2 befestigt. Der Elektromotor kann über einen gesonderten, nicht näher dargestellten, beispielsweise am Kesselmantel 3 befestigten Schalter und ein entsprechendes Netzkabel mit Strom versorgt oder durch geeignete Mittel an die elektrische Schaltung in der Abdeckkappe 21, beispielsweise über eine lösbare Leitungskupplung, angeschlossen sein. In der elektrischen Zuleitung zum Elektromotor 56 ist ein Schwimmerschalter 57 angeordnet, der über ein flexibles, aus dem Motorgehäuse abgedichtet herausgeführtes isoliertes Kabel angeschlossen ist und frei beweglich im Zwischenspeicher 7 liegt. Ab Erreichen eines vorbestimmten Wasserstandes im Zwischenspeicher 7 schwimmt der Schwimmerschalter 57 in einer vorbestimmten, durch seine Masseverteilung festgelegten Stellung auf, wodurch der Elektromotor 56 eingeschaltet wird, bis durch Abpumpen des im Zwischenspeicher 7 befindlichen Wassers der Wasserspiegel soweit auf ein vorbestimmtes tieferes Niveau abgesunken ist, bei welchem die Pumpe 55 wieder abgeschaltet wird. Die Auslaßöffnung der Pumpe 55 ist an das untere Ende einer im Zwischenspeicher 7 nach oben geführten Druckleitung 59 angeschlossen, die unterhalb des Bodens 43 des Filtergehäuses durch den Kesselmantel 3 nach außen geführt und mit einem am Kesselmantel 3 befestigten Steckstutzen 60 verbunden ist. In der Druckleitung 59 ist ein Rückschlagventil 61 angeordnet, das bei Unterdruck auf der zur Pumpe 55 hin liegenden Seite schließt, so daß in diesem Fall kein Wasser durch die Pumpe in den Zwischenspeicher 7 zurückströmen kann. Zur Benutzung des Reinigungsgerätes wird über ein geeignetes Kupplungsstück an das äußere Ende des Stutzens 47 ein Saugschlauch mit einem Ende angeschlossen, der am anderen Ende mit einem geeigneten Saug- bzw. Beckenreinigungskopf versehen wird. Wiederum über ein geeignetes Kupplungsstück wird an den Steckstutzen 60 ein in Wasser sinkfähiger Schlauch von ausreichender Länge angeschlossen. Das Reinigungsgerät wird mit dem Fahrgestell 9 neben dem Beckenrand aufgestellt, der sinkfähige Schlauch wird in das wassergefüllte Becken abgelassen, und ebenso wird der Saugkopf oder dgl. im Beckenwasser versenkt. Nach Einschalten des Gerätes bzw. der Saugeinrichtung 14 wird in der Unterdruckkammer 6 unter Schließung des Rückschlagventiles 61 ein Unterdruck aufgebaut, durch welchen das verschmutzte Wasser durch die Austrittsöffnung 48 in den Naßfilter 41 angesaugt und nach filternder Durchdringung des Naßfilters 41 von innen auch außen im Zwischenspeicher 7 gesammelt wird. Sobald der Wasserstand im Zwischenspeicher 7 das genannte Niveau erreicht hat, wird die Pumpe 55 durch den Schwimmerschalter 57 eingeschaltet, so daß sie gegen den Unterdruck im Kessel 1 und daher unter Mitwirkung bei der Aufrechterhaltung bzw. Erhöhung dieses Unterdruckes das gesammelte Wasser unter Öffnung des Rückschlagventils 61 abpumpt und dem Schwimmbecken zurückführt.The feedback device 53 has a pump 55 designed in the manner of an immersion pump, structurally combined with an electric motor 56, on the upper side of which the motor 56 is fastened in an axially aligned arrangement and which has suction openings 54 on its circumference in the lower region. The pump 55 is fixed on the floor 2 in the boiler 2. The electric motor can be supplied with power via a separate switch (not shown in more detail, for example attached to the boiler jacket 3) and a corresponding mains cable, or can be connected by suitable means to the electrical circuit in the cover cap 21, for example via a detachable line coupling. A float switch 57 is arranged in the electrical feed line to the electric motor 56, which is connected via a flexible, insulated cable which is led out of the motor housing and is freely movable in the buffer store 7. From reaching one Predetermined water level in the intermediate store 7, the float switch 57 floats to a predetermined position determined by its mass distribution, whereby the electric motor 56 is switched on until the water level has dropped to a predetermined lower level by pumping off the water in the intermediate store 7, at which the Pump 55 is switched off again. The outlet opening of the pump 55 is connected to the lower end of a pressure line 59 which is led upwards in the intermediate store 7 and which is led out through the boiler jacket 3 below the bottom 43 of the filter housing and is connected to a plug socket 60 fastened to the boiler jacket 3. A check valve 61 is arranged in the pressure line 59 and closes when the vacuum is on the side facing the pump 55, so that in this case no water can flow back through the pump into the intermediate store 7. To use the cleaning device, a suction hose with one end is connected to the outer end of the nozzle 47 via a suitable coupling piece, which is provided at the other end with a suitable suction or pool cleaning head. Again via a suitable coupling piece, a hose of sufficient length that is sinkable in water is connected to the connector 60. The cleaning device is set up with the chassis 9 next to the edge of the pool, the sinkable hose is drained into the water-filled pool, and the suction head or the like is also sunk in the pool water. After switching on the device or the suction device 14, a negative pressure is built up in the vacuum chamber 6 with the check valve 61 closed, through which the contaminated water is sucked in through the outlet opening 48 into the wet filter 41 and, after filtering penetration of the wet filter 41, also from the inside in the intermediate store 7 is collected. As soon as the water level in the intermediate store 7 has reached the above-mentioned level, the pump 55 is switched on by the float switch 57 so that it counteracts the negative pressure in the boiler 1 and therefore with the participation in maintaining or increasing this negative pressure the water collected while opening the check valve 61 pumped out and returned to the swimming pool.

Teile des Reinigungsgerätes oder auch das gesamte Reinigungsgerät kann außer zur Wasserreinigung auch zur Trockenabsaugung, also nach Art eines Staubsaugers, verwendet werden. Entweder kann die Saugeinrichtung 14 als Deckel 4 und unter Verwendung eines anderen Filters 41, nämlich eines als Staubfilter ausgebildeten Filters, auf einen anderen, im oberen Bereich im wesentlichen gleich wie der dargestellte Kessel 1 ausgebildeten Kessel aufgesetzt werden, welcher keine Rückführeinrichtung 53 aufweist und daher eine geringere Bauhöhe haben kann. In diesem Fall weist der Trockenfilter dann keine Durchtrittsöffnung auf, derart, daß die Austrittsöffnung 48 an seiner Außenseite liegt und der zu filternde Strom den Filter von außen nach innen durchdringt. Daher werden die anfallenden Schmutzpartikel an der Außenseite des Filters abgeschieden und fallen nach unten in den Kessel, in welchem sie bis zur Entleerung gesammelt werden. Es ist aber auch denkbar, für den Betrieb des Reinigungsgerätes als Staubsauger eine staubdichte Abdeckung für die Rückführeinrichtung 53 vorzusehen, so daß diese im Kessel 1 bleiben kann, jedoch nicht von dem dann im Zwischenspeicher 7 zu sammelnden Schmutz beaufschlagt wird. Die lösbare Staubabdeckung wäre je nach Verwendung des Reinigungsgerätes einzusetzen oder aus dem Kessel 1 zu entnehmen. Da das Reinigungsgerät bei der Schwimmbeckenreinigung immer mitgefahren werden kann, kann ein verhältnismäßig kurzer Saug- schlauch verwendet werden. Des weiteren kann das Reinigungsgerät auch als Wasser-Förderpumpe, beispielsweise zum Wässern eines Gartens, zum Entwässern überfluteter Kellerräume oder dgl., verwendet werden.Parts of the cleaning device or the entire cleaning device can also be used for dry suction, in the manner of a vacuum cleaner, in addition to water purification. Either the suction device 14 can be placed as a cover 4 and, using another filter 41, namely a filter designed as a dust filter, on another boiler, which in the upper region is essentially the same as the boiler 1 shown, and which has no return device 53 and therefore can have a lower overall height. In this case, the dry filter then has no passage opening, such that the outlet opening 48 lies on its outside and the current to be filtered penetrates the filter from the outside inwards. Therefore, the dirt particles are separated on the outside of the filter and fall down into the boiler, where they are collected until they are emptied. However, it is also conceivable to provide a dustproof cover for the return device 53 for the operation of the cleaning device as a vacuum cleaner, so that it can remain in the boiler 1, but is not acted upon by the dirt then to be collected in the intermediate store 7. Depending on the use of the cleaning device, the removable dust cover would have to be used or removed from the boiler 1. Since the cleaning device can be always mitgefahren in the swimming pool cleaning, a relatively short suction - used hose. Furthermore, the cleaning device can also be used as a water feed pump, for example for watering a garden, for draining flooded basement rooms or the like.

Claims (10)

1. Mobile cleaner for liquids, such as water, with a suction mechanism (14) for the liquid to be cleaned and which has a suction connection (46), a wet filter (41) determining a filter intake side and arranged in the liquid flow and a recycling mechanism (53) for the cleaned liquid having a pressure connection (60) and e.g. a pump (55), the suction mechanism (14) and the recycling mechanism (53) in each case having a suction-side intake and both intakes are connected to a vacuum chamber (6), which contains air and which is to be evacuated by the suction mechanism (14), the suction connection (46) issuing into said chamber and the recycling mechanism (53) is located in the liquid flow path downstream of the wet filter (41), characterized in that the suction-side intake of the suction mechanism (14) is associated with the filter intake side of the wet filter (41).
2. Cleaner according to claim 1, characterized in that between the suction side (54) and the pressure connection (60) of the recycling mechanism (53) is provided a check valve (61) closing in the case of outlet-side overpressure and which in particular is a leaf valve located in a pressure line (59).
3. Cleaner according to claims 1 or 2, characterized in that the suction port (54) of the recycling mechanism (53) and the vacuum chamber (6) are provided in superimposed manner in a common main chamber (5), particularly an upright tank (1) having a much greater height than its width and in particular the vacuum chamber (6) is formed by the pressure-tight area above the liquid level of an intermediate liquid reservoir (7) in the main chamber (5).
4. Cleaner according to one of the preceding claims, characterized in that the suction mechanism (14) and the recycling mechanism (53) are formed by separate units and in particular substantially by a motor exhauster (17) and/or a motor pump (55), which are preferably constructionally combined with the tank (1) and in particular the pump (55), e.g. a submersible pump, is located below the vacuum chamber (6), preferably on the bottom (2) of the main chamber (5) and in particular at least one suction port (54) is in the immediate vicinity of the bottom and/or the pressure line (59) passes in pressure-tight manner out of the main chamber (5).
5. Cleaner according to one of the preceding claims, characterized in that the recycling mechanism (53) is controlled as a function of the liquid level in the cleaner, preferably with a float switch (57) and that the wet filter (41) is in particular located above the highest liquid level.
6. Cleaner according to one of the preceding claims, characterized in that the suction mechanism (14) is positioned on the top of the vacuum chamber (6) and preferably with the suction side detachably closes the wet filter (41) and/or the vacuum chamber (6) at an upper opening and in particular forms a tank cover (4) and/or a ring clip for the wet filter (41) and preferably the suction connection (46) slopes downwards below the suction mechanism (14), issues into the vacuum chamber (6) and is preferably formed by a connecting piece (47) inserted radially into the tank wall (3).
7. Cleaner according to one of the preceding claims, characterized in that with the suction port (26) of suction mechanism (14) is associated a float valve (31), which preferably has a float (32) located in the tank axis and which is guided in a support cage (35) or the like for the wet filter (41) constructionally combined with the suction mechanism (14) and inserted in the wet filter (41) and in particular in the starting position (fig. 1) is located with its valve closing member (33) roughly level with its suction connection (46) adjacent to its circumference.
8. Cleaner according to one of the preceding claims, characterized in that for the reception of the wet filter (41), which is in particular constructed as a disposable or interchangeable filter, is provided a filter housing in the form of preferably a coated textile jacket (42) with a dimensionally stable perforated bottom (43), e.g. a perforated plate, which in particular has a lateral opening (49) for the sealed passage of the suction connection (46) and in particular the wet filter (41) is fixed by clamping its upper, outwardly inverted over edge (45) against a profile ring (449) sealing the top of the vacuum chamber (6) and which preferably carries the filter housing (42, 43) and/or is multiply radially inwardly stepped from top to bottom.
9. Cleaner according to one of the preceding claims, characterized in that it is in particular provided for swimming pools and has a wheel frame (9), which is preferably provided with self- guiding casters (11) and/or has a mounting support, such as a chassis (10) for the removable arrangement of tank (1).
10. Wet filter for a cleaner according to one of the claims 1 to 9, characterized in that the wet filter (41) is in the form of a filter bag or the like made from a paper web or the like with high, hydraulic permeability and in the jacket has a passage opening (50) for the suction connection (46), which is preferably formed by a sleeve (51) fixed to its inside and having an elastically defined passage opening for the suction connection (46) and which is e.g. in the form of a flat, flexible reinforcement.
EP85101605A 1984-03-23 1985-02-14 Cleaning apparatus for swimming-pools or the like Expired - Lifetime EP0155502B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85101605T ATE55444T1 (en) 1984-03-23 1985-02-14 CLEANING DEVICE FOR SWIMMING POOLS OR LIKE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3410817 1984-03-23
DE19843410817 DE3410817A1 (en) 1984-03-23 1984-03-23 CLEANING DEVICE FOR SWIMMING POOLS OR THE LIKE

Publications (3)

Publication Number Publication Date
EP0155502A2 EP0155502A2 (en) 1985-09-25
EP0155502A3 EP0155502A3 (en) 1986-10-01
EP0155502B1 true EP0155502B1 (en) 1990-08-08

Family

ID=6231465

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85101605A Expired - Lifetime EP0155502B1 (en) 1984-03-23 1985-02-14 Cleaning apparatus for swimming-pools or the like

Country Status (4)

Country Link
US (1) US4801376A (en)
EP (1) EP0155502B1 (en)
AT (1) ATE55444T1 (en)
DE (2) DE3410817A1 (en)

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Also Published As

Publication number Publication date
DE3410817A1 (en) 1985-10-03
DE3579016D1 (en) 1990-09-13
ATE55444T1 (en) 1990-08-15
EP0155502A3 (en) 1986-10-01
EP0155502A2 (en) 1985-09-25
US4801376A (en) 1989-01-31

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