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EP0039309B1 - Device for dispensing a metered quantity of an additive - Google Patents

Device for dispensing a metered quantity of an additive Download PDF

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Publication number
EP0039309B1
EP0039309B1 EP81810150A EP81810150A EP0039309B1 EP 0039309 B1 EP0039309 B1 EP 0039309B1 EP 81810150 A EP81810150 A EP 81810150A EP 81810150 A EP81810150 A EP 81810150A EP 0039309 B1 EP0039309 B1 EP 0039309B1
Authority
EP
European Patent Office
Prior art keywords
float
chamber
metering
pipe nozzle
collecting chamber
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
Application number
EP81810150A
Other languages
German (de)
French (fr)
Other versions
EP0039309A1 (en
Inventor
Jacques Bousgarbiès
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.)
Airwick AG
Original Assignee
Airwick AG
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Filing date
Publication date
Application filed by Airwick AG filed Critical Airwick AG
Priority to AT81810150T priority Critical patent/ATE4234T1/en
Publication of EP0039309A1 publication Critical patent/EP0039309A1/en
Application granted granted Critical
Publication of EP0039309B1 publication Critical patent/EP0039309B1/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
    • E03D9/02—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing
    • E03D9/03—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing consisting of a separate container with an outlet through which the agent is introduced into the flushing water, e.g. by suction ; Devices for agents in direct contact with flushing water
    • E03D9/033—Devices placed inside or dispensing into the cistern
    • E03D9/037—Active dispensers, i.e. comprising a moving dosing element
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
    • E03D9/02—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing
    • E03D2009/028—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing using a liquid substance

Definitions

  • the invention relates to a device for the metered delivery of an active ingredient from a storage container into a surrounding liquid, the level of which temporarily rises and falls, according to the preamble of claim 1.
  • Such devices are used e.g. in toilet cisterns to add any disinfectants, cleaning agents or deodorants to the flushing water.
  • the active ingredient is not metered into all of the flushing water, but rather is applied to the water surface in concentrated form during the outflow from the cistern.
  • cisterns practically never empty completely and that a certain amount of rinsing water always remains in them. Since the active substance is now essentially applied to the flushing water surface, in undiluted form, a considerable amount of active substance remains in the cistern in this known device and then mixes with the freshly supplied fresh water.
  • this is precisely what is undesirable for economic and ecological reasons.
  • the invention is intended to improve a metering device of the type defined in the preamble of claim 1 in such a way that it corresponds to the requirements mentioned at the outset.
  • Another object of the invention is to achieve this in a structurally simple and inexpensive manner.
  • the device according to the invention is characterized by the features of claim 1. Advantageous embodiments of the device according to the invention are described in the dependent claims.
  • the collecting chamber together with the siphon causes the active substance to be prediluted and, in this prediluted form, to be dispensed into the last remainder of the flushing water while the cistern is emptied.
  • the active ingredient dispenser for toilet bowls described in published FR patent application 2424364, but it serves a completely different purpose there.
  • this known metering device is not intended for arrangement in the cistern, but rather for mounting directly in the toilet bowl.
  • the active ingredient in solid form that dissolves in the rinsing water overflowing during the rinsing process.
  • the siphon only serves to collect the highly concentrated liquid residues dripping from the moist active ingredient.
  • the active ingredient is also dispensed into the entire rinsing water in this doser.
  • the rotationally symmetrical device comprises a carrier 1 with a coaxial pipe socket 2 and a float 3, which is movably guided up and down on the carrier between an upper and a lower end position (in the position of use).
  • the carrier 1 is designed as a hollow sealing pin and sits tightly in the opening neck 4, which is normally closed by a screw cap or the like, of a storage container 5, e.g. a bottle of suitable shape.
  • a storage container 5 e.g. a bottle of suitable shape.
  • the bottom 1 a of the support 1 is funnel-shaped, the pipe socket 2 opens axially into the lowest point of the support base.
  • the float is composed of two coaxial, one-piece parts.
  • the outer part consists of a float tube 6, an approximately tulip-shaped, upwardly open insert 7, which is fixed with its edge approximately in the upper third of the float tube and divides the latter into an upper and a lower tube section 6a or 6b, and one overflow pipe 8 inserted into the bottom 7a of the insert.
  • the upper pipe section 6a has ge a slightly smaller diameter compared to the lower one, but this is irrelevant for the function.
  • the overflow pipe 8 discharges downwards into the environment, its upper edge 8a lies approximately at half the height of the insert 7.
  • the inner float part consists of two cylindrical cups 9 and 10, which are connected by a common bottom 9a and are open at the top and bottom, a coaxial guide rod 11 and four retaining wings 12.
  • the latter extend radially from the upper container 9 to the inner wall of the upper tube section 6a . They lie on the one hand on the upper edge of the insert 7 and, on the other hand, engage behind an annular bead 13 which is formed on the tube section 6a and projects inwards.
  • the two parts of the float 2 are immovably connected to one another by means of these retaining wings 12.
  • the cup 10 of the inner float part which is open at the bottom, stands up with its degree of opening at the bottom 7a of the insert 7.
  • the degree of opening is provided with numerous openings 10 a on its circumference, so that the spaces inside and outside of the cup 10 communicate.
  • the diameter of the cup 10 lies approximately in the middle between those of the overflow pipe 8 and the lower region of the insert 7.
  • the guide rod 12 has a cross-shaped profile. It is firmly connected to the bottom 9a of the inner float part and guided up and down in the pipe socket 2. Through the cross-shaped profile, flow channels remain free in the pipe socket, through which the liquid active substance F can flow from the reservoir 5 into the cup 9.
  • the upper end of the guide rod 11 is slotted and provided with four radially inward resilient locking cams 11a which engage behind the end or the upper opening edge of the pipe socket 2 and thereby fasten the guide rod 11 and thus the entire float 3 to the carrier 1. (To join carrier 1 and float 3, the guide rod 11 is simply inserted through the pipe socket 2, the locking cams 11 a being temporarily deformed inwards.)
  • the diameter of the upper cup 9 of the inner float part is somewhat larger than that of the pipe socket 2.
  • the height or length of the cup 9 and the pipe socket 2 are coordinated with one another in such a way that the lower opening edge 2a of the socket 2 in the case of FIGS. 1 and 4 shown lower end position of the float 3 is just below or at about the same height as the opening degree 9b of the cup 9.
  • the pipe socket 2 dips into the cup 9 and stands on its bottom 9a.
  • the float 3 is gradually raised until it finally reaches its upper end position (Fig. 2).
  • the pipe socket 2 penetrates further and further into the metering chamber 9 and displaces an active substance volume corresponding to its immersion state from the metering chamber.
  • This precisely metered volume now flows off over the edge of the chamber and collects in the lower part of the insert 7 serving as a collecting chamber.
  • the active substance volume or the height of the overflow pipe 8 is dimensioned such that the active substance does not flow off via the overflow 8.
  • the prediluted active ingredient remains enclosed in the collecting chamber 7 and, apart from the negligible diffusion through the overflow 8, cannot get into the surrounding rinsing water. If the container 5 in the cistern should happen to be located lower than shown, so that the highest water level would then be higher than shown relative to the container neck 4, the water level within the space enclosed by the hollow support 1 cannot rise significantly higher because of the air volume then enclosed, so that the active substance in the metering chamber 9 cannot come into contact with the penetrating water and can flow out of the metering chamber.
  • the pre-diluted active ingredient therefore only reaches the water in the cistern in the last functional phase, and only in its top layer, corresponding approximately to the last liter flowing out.
  • This has the effect that essentially only the flushing water remaining in the siphon of the toilet bowl contains active substance, while the rest of the water, which is already flowing away, remains free of active substance.
  • This allows higher concentrations and nevertheless lower consumption of active ingredient for a given number of rinses and accordingly higher effectiveness and economy.
  • more than twice as many rinses can be carried out as with the device described in US Pat. No. 2,967,310.
  • the device according to the invention also consists of two main components, namely a quantitative metering unit and a dispensing control unit.
  • the quantitative dosing unit essentially consists of the dosing chamber 9 and the pipe socket 2 as well as the float that actuates or controls it, designated as a whole by 3.
  • the dispensing control unit contains those elements which prevent premature and thus undesirable outflow of the amount of active substance dispensed by the metering unit into the ambient liquid. These elements are primarily the collecting chamber 7 with the overflow pipe 8 and the lower cup 10, which together with the overflow pipe 8 forms the siphon. Furthermore, these elements also include the upper section 6a of the float tube 6, which projects into the support 1 in the upper float position and thus prevents the ingress of water from above.
  • the two main components of the invention in particular the dispensing control unit, can be implemented in a variety of ways. It is only essential that the active ingredient is only released during the emptying of the ambient water, specifically into the uppermost, last-flowing layer of the latter.
  • the described embodiment of the device according to the invention is particularly advantageous, since it is structurally very simple and accordingly easy and inexpensive to manufacture. Because of these properties, it is therefore also available as a mass disposable item, e.g. in connection with hygiene sets etc.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Level Indicators Using A Float (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Washing And Drying Of Tableware (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur dosierten Abgabe eines Wirkstoffs aus einem Vorratsbehälter in eine umgebende Flüssigkeit, deren Niveau sich zeitweise hebt und senkt, gemäss dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for the metered delivery of an active ingredient from a storage container into a surrounding liquid, the level of which temporarily rises and falls, according to the preamble of claim 1.

Derartige Vorrichtungen finden Einsatz z.B. in Toilettenspülkästen, um dort dem Spülwasser irgendwelche Desinfektions-, Reinigungs- oder Desodorierungsmittel zuzusetzen.Such devices are used e.g. in toilet cisterns to add any disinfectants, cleaning agents or deodorants to the flushing water.

Beim Spülvorgang verbleibt vom gesamten Inhalt des Spülkastens nur ein verhältnismässig kleiner Rest - etwa rund ein Liter - im Syphon der WC-Muschel. Aus diesem Grunde wäre es daher erstrebenswert, nur in diesen letzten Wasserrest eine konstante dosierte Wirkstoffmenge einzubringen derart, dass praktisch der gesamte Wirkstoff im Syphon konzentriert wäre und nichts mit dem abfliessenden Spülwasser verlorenginge.During the flushing process, only a relatively small remnant - around one liter - of the entire contents of the cistern remains in the siphon of the toilet bowl. For this reason, it would therefore be desirable to introduce a constant, dosed amount of active ingredient only into this last water residue in such a way that practically all of the active ingredient would be concentrated in the siphon and nothing would be lost with the flushing water flowing off.

Die bisher für derartige Zwecke bekannten Dosiervorrichtungen, wie sie z.B. in den US-PS Nos. 2967310, 4131958 und 4189793 beschrieben sind, werden diesen Anforderungen nicht gerecht, da sie den Wirkstoff in das gesamte im Spülkasten befindliche Spülwasser abgeben. Dies führt zu einer erheblichen Veschwendung des Wirkstoffs, weil der grösste Teil des Spülwassers mitsamt dem darin gelösten Wirkstoff abfliesst und somit für die gewünschte Wirkung im Syphon der WC-Muschel verloren ist. Zur Kompensation dieses Wirkstoff- und damit Wirkungsverlusts ist man gezwungen, den Wirkstoff in stärkerer Konzentration zu dosieren, was wiederum zu erhöhtem Wirkungsstoffverbrauch und nicht zuletzt auch zu einer erhöhten Belastung der Umwelt führt.The dosing devices known hitherto for such purposes, as e.g. in U.S. Patent Nos. 2967310, 4131958 and 4189793 are not meeting these requirements, since they release the active ingredient into the entire flushing water in the cistern. This leads to a considerable use of the active ingredient because most of the rinsing water, together with the active ingredient dissolved in it, flows off and is therefore lost in the siphon of the toilet bowl for the desired effect. To compensate for this loss of active ingredient and thus loss of activity, one is forced to dose the active ingredient in a higher concentration, which in turn leads to increased active ingredient consumption and, not least, to an increased burden on the environment.

Bei der z.B. aus der US-A-3908209 bekannten Vorrichtung wird der Wirkstoff zwar nicht in das gesamte Spülwasser zudosiert, sondern während des Abfliessens aus dem Spülkasten in konzentrierter Form im wesentlichen auf die Wasseroberfläche aufgebracht. Es ist nun aber bekannt, dass sich Spülkästen praktisch nie vollständig entleeren und immer ein gewisser Rest an Spülwasser in ihnen verbleibt. Da nun der Wirkstoff im wesentlichen auf die Spülwasseroberfläche aufgegeben wird, und zwar in unverdünnter Form, bleibt so bei dieser bekannten Vorrichtung eine erhebliche Menge Wirkstoff im Spülkasten zurück und vermischt sich dann mit dem neu zugeführten Frischwasser. Gerade dies ist aber, wie schon weiter vorne erwähnt, aus ökonomischen und ökologischen Gründen unerwünscht.With e.g. from the device known from US-A-3908209, the active ingredient is not metered into all of the flushing water, but rather is applied to the water surface in concentrated form during the outflow from the cistern. However, it is now known that cisterns practically never empty completely and that a certain amount of rinsing water always remains in them. Since the active substance is now essentially applied to the flushing water surface, in undiluted form, a considerable amount of active substance remains in the cistern in this known device and then mixes with the freshly supplied fresh water. However, as already mentioned above, this is precisely what is undesirable for economic and ecological reasons.

Durch die Erfindung sollen nun diese Nachteile vermieden werden. Insbesondere soll durch die Erfindung eine Dosiervorrichtung der im Oberbegriff des Patentanspruchs 1 definierten Art so verbessert werden, dass sie den eingangs erwähnten Anforderungen entspricht. Ein weiteres Ziel der Erfindung besteht darin, dies konstruktiv auf möglichst einfache und kostengünstige Weise zu erreichen.These disadvantages are now to be avoided by the invention. In particular, the invention is intended to improve a metering device of the type defined in the preamble of claim 1 in such a way that it corresponds to the requirements mentioned at the outset. Another object of the invention is to achieve this in a structurally simple and inexpensive manner.

Die erfindungsgemässe Vorrichtung ist durch die Merkmale des Patentanspruchs 1 gekennzeichnet. Vorteilhafte Ausgestaltungen der erfindungsgemässen Vorrichtung sind in den abhängigen Ansprüchen beschrieben.The device according to the invention is characterized by the features of claim 1. Advantageous embodiments of the device according to the invention are described in the dependent claims.

Wie sich aus der noch folgenden Funktionsbeschreibung ergibt, bewirkt die Auffangkammer zusammen mit dem Syphon, dass der Wirkstoff vorverdünnt und in dieser vorverdünnten Form während des Entleerens des Spülkastens in den letzten Rest des Spülwassers abgegeben wird. Durch diese Vorverdünnung und die durch den Syphon automatische zeitliche Steuerung der Wirkstoffabgabe wird bewirkt, dass lediglich eine vernachlässigbare Menge Wirkstoff im Restspülwasser im Spülkasten verbleibt. Ein ähnlicher Syphon ist zwar schon bei dem in der publizierten FR-Patentanmeldung 2424364 beschriebenen Wirkstoff-Dosierer für WC-Muscheln bekannt, er dient dort aber einem ganz anderen Zweck. Dieser bekannte Dosierer ist im Unterschied zur Erfindung nicht für die Anordnung im Spülkasten, sondern zur Anbringung direkt in der WC-Muschel bestimmt. Er enthält einen Wirkstoff in fester Form, der beim Spülvorgang im ihn überströmenden Spülwasser in Lösung geht. Der Syphon dient lediglich zum Auffangen der vom feuchten Wirkstoff abtropfenden hochkonzentrierten Flüssigkeitsreste. Abgesehen von den bekannten Nachteilen aller mit festen Wirkstoffen arbeitenden Dosierer wird auch bei diesem Dosierer der Wirkstoff in das gesamte Spülwasserabgegeben.As can be seen from the functional description which follows, the collecting chamber together with the siphon causes the active substance to be prediluted and, in this prediluted form, to be dispensed into the last remainder of the flushing water while the cistern is emptied. As a result of this predilution and the automatic time control of the delivery of the active ingredient through the siphon, only a negligible amount of active ingredient remains in the residual flushing water in the cistern. A similar siphon is already known for the active ingredient dispenser for toilet bowls described in published FR patent application 2424364, but it serves a completely different purpose there. In contrast to the invention, this known metering device is not intended for arrangement in the cistern, but rather for mounting directly in the toilet bowl. It contains an active ingredient in solid form that dissolves in the rinsing water overflowing during the rinsing process. The siphon only serves to collect the highly concentrated liquid residues dripping from the moist active ingredient. Apart from the known disadvantages of all dosers working with solid active ingredients, the active ingredient is also dispensed into the entire rinsing water in this doser.

Im folgenden wird die Erfindung anhand der Zeichnung näher erläutert. Die vier Zeichnungsfiguren zeigen je einen Axialschnitt durch ein Ausführungsbeispiel einer erfindungsgemässen Vorrichtung in Gebrauchslage in vier verschiedenen Funktionsphasen.The invention is explained in more detail below with reference to the drawing. The four drawing figures each show an axial section through an embodiment of a device according to the invention in the use position in four different functional phases.

Die rotationssymmetrisch ausgebildete Vorrichtung umfasst einen Träger 1 mit einem koaxialen Rohrstutzen 2 und einem Schwimmer 3, der am Träger zwischen einer (in Gebrauchslage) oberen und einer unteren Endstellung auf und ab beweglich geführt ist.The rotationally symmetrical device comprises a carrier 1 with a coaxial pipe socket 2 and a float 3, which is movably guided up and down on the carrier between an upper and a lower end position (in the position of use).

Der Träger 1 ist als hohler Verschlusszapfen ausgebildet und sitzt dicht im normalerweise durch eine Schraubkappe oder dgl. verschlossenen Öffnungshals 4 eines Vorratsbehälters 5, z.B. einer Flasche geeigneter Form. Der Boden 1 a des Trägers 1 ist trichterförmig ausgebildet, der Rohrstutzen 2 mündet axial in den tiefsten Punkt des Trägerbodens.The carrier 1 is designed as a hollow sealing pin and sits tightly in the opening neck 4, which is normally closed by a screw cap or the like, of a storage container 5, e.g. a bottle of suitable shape. The bottom 1 a of the support 1 is funnel-shaped, the pipe socket 2 opens axially into the lowest point of the support base.

Der Schwimmer ist aus zwei koaxialen, in sich einstückigen Teilen zusammengesetzt. Der äussere Teil besteht aus einem Schwimmerrohr 6, einem in etwa tulpenförmigen, nach oben offenen Einsatz 7, der mit seinem Rand etwa im oberen Drittel des Schwimmerrohrs rundum befestigt ist und letzteres in einen oberen und einen unteren Rohrabschnitt 6a bzw. 6b teilt, und einem in den Boden 7a des Einsatzes eingesetzten Überlaufrohr 8. Der obere Rohrabschnitt 6a hat gegenüber dem unteren einen etwas kleineren Durchmesser,was allerdings für die Funktion bedeutungslos ist. Das Überlaufrohr 8 mündet nach unten in die Umgebung aus, sein oberer Rand 8a liegt etwa auf der halben Höhe des Einsatzes 7.The float is composed of two coaxial, one-piece parts. The outer part consists of a float tube 6, an approximately tulip-shaped, upwardly open insert 7, which is fixed with its edge approximately in the upper third of the float tube and divides the latter into an upper and a lower tube section 6a or 6b, and one overflow pipe 8 inserted into the bottom 7a of the insert. The upper pipe section 6a has ge a slightly smaller diameter compared to the lower one, but this is irrelevant for the function. The overflow pipe 8 discharges downwards into the environment, its upper edge 8a lies approximately at half the height of the insert 7.

Der innere Schwimmerteil besteht aus zwei durch einen gemeinsamen Boden 9a verbundenen, nach oben bzw. unten offenen zylindrischen Bechern 9 bzw. 10, einem koaxialen Führungsstab 11 und vier Halteflügeln 12. Letztere erstrecken sich radial vom oberen Behälter 9 bis zur Innenwand des oberen Rohrabschnitts 6a. Sie liegen einerseits am oberen Rand des Einsatzes 7 auf und sind andererseits hinter einen am Rohrabschnitt 6a angeformten, nach innen vorspringenden Ringwulst 13 einerastet. Mittels dieser Halteflügel 12 sind die beiden Teile des Schwimmers 2 unbeweglich miteinander verbunden.The inner float part consists of two cylindrical cups 9 and 10, which are connected by a common bottom 9a and are open at the top and bottom, a coaxial guide rod 11 and four retaining wings 12. The latter extend radially from the upper container 9 to the inner wall of the upper tube section 6a . They lie on the one hand on the upper edge of the insert 7 and, on the other hand, engage behind an annular bead 13 which is formed on the tube section 6a and projects inwards. The two parts of the float 2 are immovably connected to one another by means of these retaining wings 12.

Der nach unten offene Becher 10 des inneren Schwimmerteils steht mit seinem Öffnungsgrad am Boden 7a des Einsatzes 7 auf. Der Öffnungsgrad ist an seinem Umfang mit zahlreichen Durchbrüchen 10a versehen, so dass die Räume innerhalb und ausserhalb des Bechers 10 kommunizieren. Der Durchmesser des Bechers 10 liegt etwa in der Mitte zwischen denen des Überlaufrohrs 8 und des unteren Bereichs des Einsatzes 7.The cup 10 of the inner float part, which is open at the bottom, stands up with its degree of opening at the bottom 7a of the insert 7. The degree of opening is provided with numerous openings 10 a on its circumference, so that the spaces inside and outside of the cup 10 communicate. The diameter of the cup 10 lies approximately in the middle between those of the overflow pipe 8 and the lower region of the insert 7.

Der Führungsstab 12 besitzt ein kreuzförmiges Profil. Er ist fest mit dem Boden 9a des inneren Schwimmerteils verbunden und im Rohrstutzen 2 auf und ab beweglich geführt. Durch das kreuzförmige Profil bleiben im Rohrstutzen Durchflusskanäle frei, durch welche der flüssige Wirkstoff F aus dem Vorratsbehälter 5 in den Becher 9 fliessen kann. Das obere Ende des Führungsstabs 11 ist geschlitzt und mit vier radial einwärts federnden Rastnocken 11a versehen, die das Ende bzw. den oberen Öffnungsrand des Rohrstutzens 2 hintergreifen und dadurch den Führungsstab 11 und damit den gesamten Schwimmer 3 am Träger 1 befestigen. (Zum Zusammenfügen von Träger 1 und Schwimmer 3 wird einfach der Führungsstab 11 durch den Rohrstutzen 2 eingeführt, wobei die Rastnocken 11 a vorübergehend einwärts deformiert werden.)The guide rod 12 has a cross-shaped profile. It is firmly connected to the bottom 9a of the inner float part and guided up and down in the pipe socket 2. Through the cross-shaped profile, flow channels remain free in the pipe socket, through which the liquid active substance F can flow from the reservoir 5 into the cup 9. The upper end of the guide rod 11 is slotted and provided with four radially inward resilient locking cams 11a which engage behind the end or the upper opening edge of the pipe socket 2 and thereby fasten the guide rod 11 and thus the entire float 3 to the carrier 1. (To join carrier 1 and float 3, the guide rod 11 is simply inserted through the pipe socket 2, the locking cams 11 a being temporarily deformed inwards.)

Der Durchmesser des oberen Bechers 9 des inneren Schwimmerteils ist etwas grösser als der des Rohrstutzens 2. Höhe bzw. Länge des Bechers 9 und des Rohrstutzens 2 sind so aufeinander abgestimmt, dass sich der untere Öffnungsrand 2a des Stutzens 2 bei der in Figur 1 und 4 gezeigten unteren Endlage des Schwimmers 3 knapp unterhalb des oder etwa auf gleicher Höhe wie der Öffnungsgrad 9b des Bechers 9 befindet. In der in Figur 2 und 3 gezeigten oberen Endstellung des Schwimmers 3 dagegen taucht der Rohrstutzen 2 in den Becher 9 ein und steht an dessen Boden 9a auf.The diameter of the upper cup 9 of the inner float part is somewhat larger than that of the pipe socket 2. The height or length of the cup 9 and the pipe socket 2 are coordinated with one another in such a way that the lower opening edge 2a of the socket 2 in the case of FIGS. 1 and 4 shown lower end position of the float 3 is just below or at about the same height as the opening degree 9b of the cup 9. In the upper end position of the float 3 shown in FIGS. 2 and 3, on the other hand, the pipe socket 2 dips into the cup 9 and stands on its bottom 9a.

Die beschriebene Vorrichtung arbeitet wie folgt:

  • Zunächst wird die Vorrichtung in den Hals 4 des den flüssigen Wirkstoff F enthaltenden Behälters 5 eingesetzt und dieser dann mit dem Hals nach unten in einen hier nicht dargestellten Toilettenspülkasten eingehängt.
The described device works as follows:
  • First, the device is inserted into the neck 4 of the container 5 containing the liquid active substance F and this is then hung neck down into a toilet cistern, not shown here.

In der in Fig. 1 gezeigten ersten Funktionsphase ist angenommen, der Toilettenspülkasten sei gerade geleert worden und der Spiegel des allfällig noch darin befindlichen oder bereits neu zulaufenden Spülwassers W sei noch tief. In dieser Phase befindet sich der Schwimmer 3 aufgrund seines Eigengewichts in seiner unteren Endstellung. Die durch den Becher 9 gebildete Dosierkammer ist bis zum Niveau des unteren Rands des Rohrstutzens 2 mit dem Wirkstoff F gefüllt. Ein Überfliessen ist aufgrund des hydrostatischen Druckgleichgewichts nicht möglich. Im Einsatz 7 befindet sich vom vorangegangenen Spülvorgang her noch ein kleiner Flüssigkeitsrest.In the first functional phase shown in FIG. 1, it is assumed that the toilet cistern has just been emptied and the level of the rinsing water W which is still in it or which is already running in is still deep. In this phase, the float 3 is in its lower end position due to its own weight. The dosing chamber formed by the cup 9 is filled with the active substance F up to the level of the lower edge of the pipe socket 2. Overflow is not possible due to the hydrostatic pressure balance. In the insert 7 there is still a small liquid residue from the previous rinsing process.

Wenn nun in der zweiten Funktionsphase der Flüssigkeitsspiegel im Spülkasten steigt, wird der Schwimmer 3 allmählich angehoben, bis er schliesslich seine obere Endstellung (Fig.2) erreicht. Während des Anhebens des Schwimmers dringt der Rohrstutzen 2 immer weiter in die Dosierkammer 9 ein und verdrängt ein seinem Eintauchzustand entsprechendes Wirkstoffvolumen aus der Dosierkammer. Dieses genau dosierte Volumen fliesst nun über den Rand der Kammer ab und sammelt sich im unteren Teil des als Auffangkammer dienenden Einsatzes 7. Das Wirkstoffvolumen bzw. die Höhe des Überlaufrohrs 8 ist so bemessen, dass der Wirkstoff nicht über den Überlauf 8 abfliesst.If the liquid level in the cistern rises in the second functional phase, the float 3 is gradually raised until it finally reaches its upper end position (Fig. 2). During the lifting of the float, the pipe socket 2 penetrates further and further into the metering chamber 9 and displaces an active substance volume corresponding to its immersion state from the metering chamber. This precisely metered volume now flows off over the edge of the chamber and collects in the lower part of the insert 7 serving as a collecting chamber. The active substance volume or the height of the overflow pipe 8 is dimensioned such that the active substance does not flow off via the overflow 8.

Wenn das Wasser im Spülkasten in der dritten Funktionsphase weiter bis zu seinem Höchststand steigt, dringt es durch den Überlauf 8 in die Auffangkammer 7 ein, wobei eine Vorverdünnung des darin befindlichen flüssigen Wirkstoffs stattfindet (Fig. 3).If the water in the cistern continues to rise to its maximum level in the third functional phase, it penetrates through the overflow 8 into the collecting chamber 7, with a predilution of the liquid active substance therein (FIG. 3).

Der vorverdünnte Wirkstoff bleibt dabei, wie aus der Zeichnung zu entnehmen ist, in der Auffangkammer 7 eingeschlossen und kann - abgesehen von der zu vernachlässigenden Diffusion durch den Überlauf 8 - nicht in das umgebende Spülwasser gelangen. Wenn der Behälter 5 im Spülkasten zufällig tiefer als dargestellt angeordnet sein sollte, so dass dann der höchste Wasserspiegel höher als dargestellt relativ zum Behälterhals 4 stünde, kann der Wasserspiegel innerhalb des vom hohlen Träger 1 umschlossenen Raums wegen des dann eingeschlossenen Luftvolumens nicht wesentlich höher steigen, so dass der in der Dosierkammer 9 befindliche Wirkstoff auch dann nicht mit dem eindringenden Wasser in Berührung kommen und aus der Dosierkammer abfliessen kann.As can be seen from the drawing, the prediluted active ingredient remains enclosed in the collecting chamber 7 and, apart from the negligible diffusion through the overflow 8, cannot get into the surrounding rinsing water. If the container 5 in the cistern should happen to be located lower than shown, so that the highest water level would then be higher than shown relative to the container neck 4, the water level within the space enclosed by the hollow support 1 cannot rise significantly higher because of the air volume then enclosed, so that the active substance in the metering chamber 9 cannot come into contact with the penetrating water and can flow out of the metering chamber.

Die letzte Phase des Funktionszyklus der Vorrichtung erfolgt während der Entleerung des Spülkastens. Solange der Wasserspiegel im Spülkasten sich oberhalb etwa des Öffnungsrands des Behältnishalses 4 befindet, passiert im wesentlichen noch nichts. Sobald jedoch der Wasserspiegel noch weiter sinkt, beginnt der vorverdünnte Wirkstoff aus der Auffangkammer 7 via Überlauf 8 abzufliessen, wobei mit weitersinkendem Wasserspiegel sich auch der Schwimmer 3 mit abwärts bewegt, bis er schliesslich die in Fig. 4 (und Fig. 1) gezeigte unterste Endstellung erreicht. Aufgrund der Wirkung des zwischen den Wänden des Überlaufrohrs 8 und des unteren Bechers 10 gebildeten Syphons entleert sich die Auffangkammer 7 dabei bis auf einen kleinen Rest praktisch vollständig (Fig. 1). Mit dem Absinken des Schwimmers 3 sinkt auch die Dosierkammer 9 ab, und neuer Wirkstoff F fliesst aus dem Behälter 5 in die Dosierkammer 9 nach, womit der Ausgangszustand gemäss Fig. 1 wieder erreicht ist.The last phase of the device's operating cycle takes place during the emptying of the cistern. As long as the water level in the cistern is above approximately the opening edge of the container neck 4, essentially nothing happens. However, as soon as the water level drops even further, the prediluted active ingredient begins to flow out of the collecting chamber 7 via the overflow 8, the pool also decreasing as the water level drops further mer 3 moved downward until it finally reaches the lowest end position shown in Fig. 4 (and Fig. 1). Due to the effect of the siphon formed between the walls of the overflow pipe 8 and the lower cup 10, the collecting chamber 7 is practically completely emptied except for a small remainder (FIG. 1). As the float 3 sinks, the metering chamber 9 also sinks, and new active substance F flows from the container 5 into the metering chamber 9, which means that the initial state according to FIG. 1 is reached again.

Der vorverdünnte Wirkstoff gelangt somit erst in der letzten Funktionsphase in das im Spülkasten befindliche Wasser, und zwar nur in dessen oberste Schicht entsprechend etwa dem letzten ausfliessenden Liter. Auf diese Weise wird bewirkt, dass im wesentlichen nur das im Syphon der WC-Muschel verbleibende Spülwasser Wirkstoff enthält, während das übrige, ohnehin abfliessende Wasser wirkstofffrei bleibt. Dies wiederum erlaubt höhere Konzentrationen und trotzdem geringeren Verbrauch von Wirkstoff für eine gegebene Anzahl von Spülungen und dementsprechend höhere Wirksamkeit und Wirtschaftlichkeit. So lassen sich beispielsweise mit der gleichen Wirkstoffmenge und bei gleicher Wirkstoffkonzentration im Syphon mehr als doppelt so viele Spülungen durchführen als mit der in der US-PS 2 967 310 beschriebenen Vorrichtung.The pre-diluted active ingredient therefore only reaches the water in the cistern in the last functional phase, and only in its top layer, corresponding approximately to the last liter flowing out. This has the effect that essentially only the flushing water remaining in the siphon of the toilet bowl contains active substance, while the rest of the water, which is already flowing away, remains free of active substance. This in turn allows higher concentrations and nevertheless lower consumption of active ingredient for a given number of rinses and accordingly higher effectiveness and economy. For example, with the same amount of active ingredient and with the same active ingredient concentration in the siphon, more than twice as many rinses can be carried out as with the device described in US Pat. No. 2,967,310.

Entsprechend diesem erfindungsgemässen Prinzip der sowohl quantitativ als auch zeitlich dosierten bzw. gesteuerten Abgabe des Wirkstoffs besteht die erfindungsgemässe Vorrichtung auch aus zwei Hauptkomponenten, und zwar einer quantitativen Dosiereinheit und einer Abgabesteuereinheit. Die quantitative Dosiereinheit besteht im wesentlichen aus der Dosierkammer 9 und dem Rohrstutzen 2 sowie dem sie betätigenden bzw. steuernden, als Ganzes mit 3 bezeichneten Schwimmer. Die Abgabesteuereinheit enthält diejenigen Elemente, welche ein vorzeitiges und damit unerwünschtes Abfliessen der von der Dosiereinheit abgegebenen Wirkstoffmenge in die Umgebungsflüssigkeit verhindern. Diese Elemente sind in erster Linie die Auffangkammer 7 mit dem Überlaufrohr 8 und dem unteren Becher 10, der mit dem Überlaufrohr 8 zusammen den Syphon bildet. Ferner gehört zu diesen Elementen noch der obere Abschnitt 6a des Schwimerrohrs 6, der in der oberen Schwimmerstellung in den Träger 1 hineinragt und damit das Eindringen zum Wasser von oben her verhindert.In accordance with this principle according to the invention of the active ingredient being dispensed or controlled both quantitatively and over time, the device according to the invention also consists of two main components, namely a quantitative metering unit and a dispensing control unit. The quantitative dosing unit essentially consists of the dosing chamber 9 and the pipe socket 2 as well as the float that actuates or controls it, designated as a whole by 3. The dispensing control unit contains those elements which prevent premature and thus undesirable outflow of the amount of active substance dispensed by the metering unit into the ambient liquid. These elements are primarily the collecting chamber 7 with the overflow pipe 8 and the lower cup 10, which together with the overflow pipe 8 forms the siphon. Furthermore, these elements also include the upper section 6a of the float tube 6, which projects into the support 1 in the upper float position and thus prevents the ingress of water from above.

Es versteht sich, dass die beiden Hauptkomponenten der Erfindung, insbesondere die Abgabesteuereinheit, auf mannigfaltige Art und Weise realisiert werden können. Wesentlich ist lediglich, dass die Abgabe des Wirkstoffs erst während der Entleerung des Umgebungswassers, und zwar in die oberste, zuletzt abfliessende Schicht des letzteren erfolgt. Die beschriebene Ausführungsform der erfindungsgemässen Vorrichtung ist besonders vorteilhaft, da sie konstruktiv sehr einfach und dementsprechend leicht und preisgünstig herstellbar ist. Aufgrund dieser Eigenschaften ist sie daher auch als Massen-Wegwerfartikel, wie z.B. im Zusammenhang mit Hygiene-Garnituren etc., geeignet.It goes without saying that the two main components of the invention, in particular the dispensing control unit, can be implemented in a variety of ways. It is only essential that the active ingredient is only released during the emptying of the ambient water, specifically into the uppermost, last-flowing layer of the latter. The described embodiment of the device according to the invention is particularly advantageous, since it is structurally very simple and accordingly easy and inexpensive to manufacture. Because of these properties, it is therefore also available as a mass disposable item, e.g. in connection with hygiene sets etc.

Claims (15)

1. A device for the metered release of a liquid active ingredient from a stock container into a surrounding liquid, the level of which rises and falls from time to time, having a level-controlled metering unit (2, 9, 3) which communicates with the interior (5) of the container and releases a defined quantity of active ingredient when a float (3) is raised, and having a release-control unit (7, 8, 10) which releases the quantity (F) of active ingredient, held ready by the metering unit (2, 9, 3), into the surrounding liquid (W) only while the latter is falling, and substantially into the uppermost layers thereof, wherein said release-control unit (7, 8, 10) has a collecting chamber (7, 6a) which is connected to the metering unit (2, 9, 3) and the bottom (7a) of which is fitted with an overflow syphon (8,10).
2. A device according to claim 2, wherein the collecting chamber (7, 6a) surrounds the metering unit like a beaker.
3. A device according to claim 2, wherein the overflow syphon is formed by an overflow pipe (8) which passes through the bottom (7a) of the chamber (7, 6a) and by a beaker (10) which surrounds the pipe and is open at the bottom, the edge of the opening of the beaker being located at a distance from the bottom (7a) of the collecting chamber (7, 6a) or being provided with passage orifices (10a).
4. A device according to claim 2 or 3, wherein the release-control unit (7, 8, 10) is designed as a float or is located in the float (3).
5. A device according to any of claims 1-4, wherein the metering unit comprises a pipe nozzle (2) which is substantially vertical in the use position and communicates with the interior of the stock container (5), and a metering chamber (9) which is located on the float (3), is open at the top and surrounds the pipe nozzle (2), and wherein the float (3) with the metering chamber (9) is guided vertically so that it can move up and down between two end positions, the lower end (2a) of the pipe nozzle (2) being located, when in the lower end position, essentially at the approximate height of the edge (9b) of the opening of the metering chamber (9) and, when in the upper end position, the end (2a) of the pipe nozzle projecting further into the metering chamber (9).
6. A device according to claim 5, wherein the lower end (2a) of the pipe nozzle (2) rests on the chamber bottom (9a), when the float (3) is in the upper end position, and thus limits the upward movement of the float.
7. A device according to claim 5 or 6, wherein the float (3) has a guide rod (11) which is fixed to the bottom (9a) of the metering chamber (9) and extends through the pipe nozzle (2) and is guided therein.
8. A device according to claim 7, wherein the free end of the guide rod (11) is provided with stop elements (11 a) which are elastically deformable radially inwards and which reach around the end of the pipe nozzle (2) on the container side and limit the downward movement of the float (3).
9. A device according to any of claims 1-8, wherein the metering unit (2, 9, 3) and the release-control unit (7, 8, 10) are located on a carrier (1) which is designed as a closing plug.
10. A device according to claims 2 and 5, wherein the collecting chamber (7) coaxially encloses the metering chamber (9).
11. A device according to any one of claims 1 to 10, wherein the float (3) has an annular air chamber (6, 7), which is open at the bottom, in order to generate buoyancy.
12. A device according to claim 11, wherein the collecting chamber (7) is designed to widen towards the top and the edge of its opening is fixed to the inner periphery of a coaxial float tube (6), the air chamber being formed by the tube (6) and the outer wall of the collecting chamber (7).
13. A device according to claim 12, wherein the float tube (6), the collecting chamber (7) and the overflow (8) of the latter are formed integrally.
14. A device according to claim 13, wherein the metering chamber (9), the guide rod (11) and the beaker (10) which is open at the bottom are formed integrally, the metering chamber (9) and the beaker (10) being arranged coaxially and having a common bottom (9a), and the unit consisting of these three parts (9, 10, 11) is coaxially fixed by means of a snap-in connection (12,13) in the unit consisting of the collecting chamber (7), the overflow (8) and the tube (6).
15. A device according to claim 9 and 12, wherein the carrier (1) which carries the pipe nozzle (2) is formed as a cap which is open at the bottom, the external diameter of the float tube (6) is smaller than that of the cap (1) and, when the float (3) is in the upper end position, at least a part of the float tube (6) is located within the cap.
EP81810150A 1980-04-25 1981-04-21 Device for dispensing a metered quantity of an additive Expired EP0039309B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81810150T ATE4234T1 (en) 1980-04-25 1981-04-21 METERED DELIVERY DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3208/80 1980-04-25
CH320880 1980-04-25

Publications (2)

Publication Number Publication Date
EP0039309A1 EP0039309A1 (en) 1981-11-04
EP0039309B1 true EP0039309B1 (en) 1983-07-20

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US (1) US4429809A (en)
EP (1) EP0039309B1 (en)
JP (1) JPS56167036A (en)
AR (1) AR227780A1 (en)
AT (1) ATE4234T1 (en)
AU (1) AU6982981A (en)
BR (1) BR8102478A (en)
CA (1) CA1148304A (en)
DE (1) DE3160636D1 (en)
ES (1) ES501614A0 (en)
NZ (1) NZ196929A (en)
PT (1) PT72904B (en)

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Also Published As

Publication number Publication date
JPS56167036A (en) 1981-12-22
US4429809A (en) 1984-02-07
EP0039309A1 (en) 1981-11-04
PT72904A (en) 1981-05-01
ATE4234T1 (en) 1983-08-15
CA1148304A (en) 1983-06-21
AU6982981A (en) 1981-10-29
DE3160636D1 (en) 1983-08-25
ES8300366A1 (en) 1982-11-01
NZ196929A (en) 1984-02-03
ES501614A0 (en) 1982-11-01
AR227780A1 (en) 1982-12-15
BR8102478A (en) 1982-01-05
PT72904B (en) 1984-12-04

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