WO2002036894A1 - Dispositifs de dosage de liquide - Google Patents

Dispositifs de dosage de liquide Download PDF

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Publication number
WO2002036894A1
WO2002036894A1 PCT/GB2001/004808 GB0104808W WO0236894A1 WO 2002036894 A1 WO2002036894 A1 WO 2002036894A1 GB 0104808 W GB0104808 W GB 0104808W WO 0236894 A1 WO0236894 A1 WO 0236894A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
product
chamber
dosing
reservoir
Prior art date
Application number
PCT/GB2001/004808
Other languages
English (en)
Inventor
Brian Slade
Original Assignee
Brian Slade
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US10/415,312 priority Critical patent/US20040025233A1/en
Application filed by Brian Slade filed Critical Brian Slade
Priority to EP01978645A priority patent/EP1330578B1/fr
Priority to DE60126308T priority patent/DE60126308T2/de
Priority to AU1074102A priority patent/AU1074102A/xx
Publication of WO2002036894A1 publication Critical patent/WO2002036894A1/fr

Links

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
    • E03D9/032—Devices connected to or dispensing into the bowl
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K3/00—Baths; Douches; Appurtenances therefor
    • A47K3/001—Accessories for baths, not provided for in other subgroups of group A47K3/00 ; Insertions, e.g. for babies; Tubs suspended or inserted in baths; Security or alarm devices; Protecting linings or coverings; Devices for cleaning or disinfecting baths; Bath insulation

Definitions

  • This invention relates to devices for dosing a liquid product into a flow of liquid, and especially to devices intended to be used in systems which have an intermittent flow of liquid.
  • the invention is particularly concerned with the dosing of a liquid product into a receiver such as a water closet or a urinal bowl in association with the flushing of the receiver.
  • the invention has, however, wider applicability.
  • toilet fresheners in the form of a solid or semi- solid product, a rim block', to be mounted within the inner rim of a water closet bowl where the flushing water will wash over the product and so dissolve or erode it to release active constituents into the water flow.
  • EP-A-0538957 describes a device that can be mounted within the inner rim of a water closet bowl to dose a liquid freshening product into the flushing water.
  • the liquid product is dosed into the water flow from a porous substrate which is disposed in the path of the flushing water.
  • the porous substrate is supplied with the liquid product from a reservoir disposed above the substrate, a mouth of the reservoir opening onto the upper surface of the substrate.
  • EP-A-0785315 describes a development of the device discussed above.
  • the same basic principle of dosing a liquid product into a flow of water from a porous substrate is employed.
  • liquid product from a reservoir is deposited onto the upper surface of the substrate via a regulating channel.
  • the liquid is metered into the channel through an orifice and a separate air opening to the interior of the reservoir is provided.
  • the sizes of the metering orifice and the air opening are strictly regulated to the viscosity of the liquid being dosed. This is described as having the effect of providing a substantially constant head of the liquid above the substrate, independent of the level in the reservoir.
  • a distributor for releasing a substance into a toilet bowl is a perforated or slotted tube fitted around the bowl in the path of flush water. Solids or liquids in the tube are washed out with flush water.
  • the tube may be filled from inverted containers (Figs. 19-22). There is no disclosure of how a liquid may be retained in the tube when flush water is not running.
  • a container to be hung in the path of flushing water contains a solid or gel to which access is gained by the water upwardly through a perforated or porous base.
  • the gel or solid is dissolved and drops from the container.
  • the process will not necessarily be proportionate to the amount of flushing water and because of its slowness will continue for some time after the flush ceases. The inventor did not disclose that liquids could be used.
  • the present invention in contrast, enables a liquid material or a fluent gel (i.e. one which will flow under gravity) such as a deodorant, perfume, disinfectant or bleach, to be reliably retained in the device until water contacts the device then, being liquid, to flow immediately reliably and proportionately into the water and then to cease flow when the water flow ceases.
  • a liquid material or a fluent gel i.e. one which will flow under gravity
  • a deodorant, perfume, disinfectant or bleach i.e. one which will flow under gravity
  • the water will usually be flush water of a toilet bowl or urinal, but may be bath or wash-basin water
  • the present invention provides a device for dosing a product into a flow of liquid, the device comprising a chamber for the liquid product, said chamber having a porous wall through which the liquid product is transported when the porous wall is within the flow of liquid but which retains the product within the chamber when the liquid flow is removed.
  • the desired N ⁇ on-off effect can be achieved by appropriate selection of the resistance of the porous chamber wall to movement of the fluid product through it, for instance by selection of the pore size of the wall, based on the rheology of the liquid product, in particular its viscosity. More specifically, the resistance of the wall is selected to be sufficient to substantially resist any flow of the product from the chamber when the outside of the chamber wall is exposed to ambient pressure, since its hydrostatic pressure cannot exceed a certain value. However, as the liquid into which the product is dosed flows over the porous wall of the dosing chamber there is a resulting drop in static pressure to the outside of the wall.
  • the resistance of the porous wall is chosen such that the resultant pressure difference across the wall causes the fluid product to flow outwardly through the wall into the liquid flow.
  • the invention provides a device of relatively simple construction which is nevertheless able to offer very good control of the dosing of the fluid product into the liquid flowing over the chamber.
  • examples of preferred uses include the dosing of a foaming bath product or the like into a bath along with the tap water and dosing an e.g. deodorising and/or disinfecting liquid product into a toilet bowl or urinal along with the flush water.
  • the receiver may be, for example, a water closet bowl or a urinal.
  • the device includes a reservoir from which the product can be supplied to the chamber, for example by gravity.
  • a reservoir from which the product can be supplied to the chamber, for example by gravity.
  • the resultant static pressure may cause seepage of the liquid product through the porous wall of the chamber when the reservoir is full.
  • the resistance of the wall is set sufficiently high to avoid this seepage, when the head in the reservoir reduces as the product is used, the static pressure in the dosing chamber may not be sufficient to cause a flow of liquid through the wall when liquid flows across the wall.
  • the dosing device is arranged such that the hydrostatic pressure in the dosing chamber can be set substantially independently of the head of fluid in the reservoir.
  • this can be achieved with an arrangement in which the reservoir is closed at its top end, and the device includes an air supply through which air can enter the lower end of the reservoir or the dosing chamber.
  • the base of the reservoir is also closed save for an outlet to the dosing chamber.
  • this arrangement finds an equilibrium position in which, due to a reduction in pressure in an air space formed above the liquid in the reservoir at its closed, upper end, the column of liquid in the reservoir is supported by atmospheric pressure acting via the air supply on the liquid at the lower end of the reservoir or in the dosing chamber, as explained in more detail below.
  • the invention provides a dosing closure for a container, e.g. a bottle, the closure comprising a dosing chamber supplied with a liquid product from the container, said chamber having a porous wall through which the liquid product is transported when the porous wall is disposed within a flow of liquid.
  • the dosing chamber may be open to the interior of the container so that it can be filled simply by inverting the container.
  • the inverted container can then be held with the dosing chamber under a flow of liquid, e.g. a running tap where the dosed product is a foam bath for instance, to dose the liquid product into the flowing liquid.
  • the liquid products used with each of the various aspects of the invention preferably comprise a component that has as affinity for the flowing liquid into which it is dispensed.
  • the liquid product may comprise a component having hydrophilic properties, such as a surfactant.
  • Fig. 1 is a sectioned side view of a dosing device of a first embodiment of the present invention
  • Fig. 2 is a front elevation of the device of Fig. 1;
  • Fig. 3 is a sectioned side view of another dosing device of a second embodiment of the invention.
  • Fig. 4 is a front elevation of the device of Fig. 3 showing the reservoir substantially full;
  • Fig. 5 is a front elevation of the device of Fig. 3 showing the reservoir when depleted.
  • Fig. 6 shows a dosing closure according to another embodiment of the invention installed in the dosing opening of a container.
  • the dosing devices 2, 2' of Figs. 1-2 and 3-5 are adapted for dosing a liquid product, such as a cleansing and/or deodorising product into the bowl B of a water closet, in conjunction with the flow of water F generated when the water closet is flushed.
  • the dosing devices 2,2' each comprise a porous walled dosing chamber 6,6' of cylindrical form, suspended by a strap 8,8' from the rim R of the water closet bowl B in the path of the flushing water F.
  • a liquid product P is supplied by gravity to the dosing chamber 6,6' from a reservoir 10,10' mounted above the chamber 6,6'.
  • a holder 12,12', to which the strap 8,8' is attached, serves as a support for both the dosing chamber 6,6' and the reservoir 10,10'.
  • a cavity 14,14' within the holder 12,12' serves as a conduit between a reservoir outlet 16,16' and a centrally disposed inlet 18,18' to the dosing chamber 6, 6' .
  • the reservoir 10,10' is detachably received within a correspondingly shaped seat 20, 20' in the holder, allowing the reservoir to be removed and replaced or refilled once the liquid product it holds is exhausted. It is envisaged that the reservoirs will be provided in an initially sealed configuration. A seal 22,22' across outlet of the reservoir can be broken by a pointed element 24,24', which in these examples is moulded integrally with the holder, which pierces the seal when the reservoir 10,10' is installed on its seat 20,20'.
  • the flush water F flows over the porous wall 26,26' of the dosing chamber 6,6' creating a reduction in pressure at its outer surface sufficient to create a large enough pressure difference across the wall 26,26' to cause the liquid product P to flow outwardly through the wall.
  • the product P is therefore dosed in a controlled manner into the water flow F in the form of micro fine filaments excreted from the pores of the wall. This greatly enhances the solubility of the product P in the flowing water F, leading for instance to improved foaming of the product where that is desired.
  • the dosing chamber has a capacity greater that the dose of product per flush of the water closet, and/or the gravity supply from the reservoir is sufficiently fast, it can remain almost constantly primed, so that no matter how quickly successive flushes of the water closet follow one another the desired dose of product is introduced into the flow of water F.
  • the device can be used for dosing a variety of liquid products into a liquid flow.
  • the product will include both surfactant and perfume components.
  • the rheological behaviour of the material in particular its viscosity, can be selected with regard to the physical properties of the porous wall of the dosing chamber 6,6', which will typically have pores of size 50 to 120 microns, or vice versa, to ensure that the liquid product P is appropriately dosed into the flush water F. Normally, the liquid product P will be more viscous than the flowing liquid F.
  • Figs. 1 and 3 illustrate two alternative arrangements used to achieve this.
  • an air supply tube 30 opens at its lower end 32 into the cavity 14 of the holder 12.
  • the upper end 34 of this tube is open to atmosphere.
  • the reservoir 10 When the reservoir 10 is initially installed on the holder 12, its outlet 16 is opened by the spike 24 and product P flows from the reservoir 10 down through the cavity 14 into the dosing chamber 6.
  • the liquid escaping from the reservoir 10 is replaced by air, which enters the reservoir via the air supply tube 30.
  • the passage of air to the reservoir 10 is cut off. This in turn causes a drop in pressure in the free space 36 above the liquid product in the reservoir 10.
  • a state of equilibrium is rapidly reached in which, given the reduction in pressure in the space 36, the liquid column in the reservoir 10 and cavity 14 above the lower end 32 of the air supply tube 30 is supported by atmospheric pressure at the liquid/air interface 38 at the lower end of the air supply tube 30.
  • the liquid level in the reservoir 10 falls further. This results in an increase of the volume of the sealed air space 36 and a consequential drop in the air pressure in this space 36. This in turn causes air to flow into the cavity 14 through the air tube 30, the air forming a series of bubbles 40 at the lower end 32 of the tube 30 to bubble upwardly through the reservoir to the air space 36, increasing the pressure in that space until an equilibrium is once again restored. Once the equilibrium is restored, the hydrostatic pressure of the liquid at the level of the lower end of the air tube 30 is equal to atmospheric pressure once more.
  • Fig. 3 shows an alternative arrangement that operates in a very similar manner to achieve the desired substantially constant pressure within the dosing chamber 6' .
  • the principle difference between the device of Fig. 1 and that illustrated in Fig. 3 is that the latter is specifically adapted to safeguard against seepage of product from the dosing chamber 6' as a result of ambient temperature variations.
  • a delivery tube 50 extends downwardly from the reservoir outlet 16 into the cavity 14 of the holder.
  • the liquid product P exits the reservoir through this tube 50, which in the present example is fixed to the reservoir 10' , but which might equally be formed integrally with the seat 20' of the holder 12' .
  • the structure of the device is very similar to that shown in Fig. 1, with the exception that the air supply tube 30' does not protrude so far into the cavity 14.
  • the liquid product P flows into the cavity 14' and from there into the dosing chamber 16' .
  • the presence of the delivery tube 50 causes an equilibrium condition to be obtained whilst there remains a generally annular air space within the cavity 14 around this tube 50.
  • the resulting free liquid level L in the cavity 14' is open to atmosphere via the air tube 30' .
  • the head of liquid above the lower end 52 of the delivery tube 50 is negated by the negative pressure present in the air space 36' at the upper end of the reservoir 10' .
  • FIG. 1 A similar compensation for temperature variations could be provided in the embodiment of Fig. 1 by giving a portion of the air supply tube 30 at or near its lower end 32 an enlarged cross-section, thus increasing the area volume into which the liquid can expand without travelling a significant distance up that tube 30.
  • a container 60 having a closure 62 in accordance with another embodiment of the invention is illustrated, suitable for instance for dosing a foam bath product P' at a controlled rate into a bath B' with water F' flowing from a tap T.
  • the closure 62 includes a porous, dome shaped plug 64, which has a hollow interior to define a dosing chamber 66.
  • the plug 64 is open to the interior of the container 60, this open end of the plug 64 being sealed to ring 68, which surrounds the end of the plug 64 and is received in the mouth 70 of the container to close it.
  • An annular recess 72 is formed in the ring 68, facing away from the mouth 70 of the container. This recess 72 receives the base of a cap (not shown) which can be used to cover the plug 64 when the container 60 is not in use.
  • a ⁇ -shape air supply tube 74 opens at one end into the dosing chamber 66, close to the closed end of the plug 64, and opens at the other end into the annular recess 72, thus providing a conduit for air from outside the container 60 into the dosing chamber 66.
  • the outer end of the air tube 74 in the recess 72 is blocked off by the cap (not shown) when in place, to prevent any inadvertent spillage of the liquid product P' through this tube when the container 60 is upright .
  • the container 60 is inverted (as shown in Fig. 6) .
  • the liquid product P' for example a bath foam product, flows into the dosing chamber 66 from the interior of the container 60.
  • the pressure of the air trapped in the space 76 above the product P' at the base 78 of the container 60 is reduced and, as in the devices of Figs. 1 and 3, an equilibrium position is reached in which the column of liquid P' in the inverted container 60 is supported by a combination of the partial vacuum created in the space 76 and atmospheric pressure acting at the liquid/air interface 80 at the inner end of the air supply tube 74.
  • the pore size of the porous wall of the dosing chamber 66 is selected, based on the viscosity of the liquid product P' , to ensure that in this equilibrium condition, with the container inverted, no product escapes through the wall.
  • the level in the container 60 drops, reducing further the air pressure in space 76.
  • the resulting imbalance in pressures across the liquid column causes air to bubble in through the air tube 74 until an equilibrium is attained once more.
  • the result is a generally constant hydrostatic pressure within the dosing chamber 66, at or about atmospheric pressure (this being the pressure that acts at the liquid/air interface 80 within the chamber 66) , irrespective of the head of liquid product P' in the inverted container 60.
  • porous walls of the dosing chambers 6,66 in the described examples are substantially rigid to retain their shape, they might be replaced, for example, by a semi-permeable membrane or the like which, if not itself sufficiently rigid to form the dosing chamber, may be supported by other means.

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  • Public Health (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • General Health & Medical Sciences (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
  • Basic Packing Technique (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

La présente invention concerne un dispositif de dosage d'un produit liquide sous forme d'un écoulement de liquide, le dispositif comprenant une chambre (6) de dosage destinée au produit liquide, ladite chambre ayant une paroi poreuse (26) à travers laquelle est transporté le produit liquide lorsque la paroi poreuse se trouve dans l'écoulement de liquide mais qui retient le produit liquide dans la chambre de dosage lorsque l'écoulement de liquide est arrêté, et une structure de tête permanente (14, 30, 36) qui permet de maintenir la pression hydrostatique du produit dans la chambre (6) sensiblement indépendante de la charge hydrostatique du produit liquide qui se trouve au-dessus.
PCT/GB2001/004808 2000-11-03 2001-10-30 Dispositifs de dosage de liquide WO2002036894A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US10/415,312 US20040025233A1 (en) 2000-11-03 2001-10-10 Liquid dosing devices
EP01978645A EP1330578B1 (fr) 2000-11-03 2001-10-30 Dispositifs de dosage de liquide
DE60126308T DE60126308T2 (de) 2000-11-03 2001-10-30 Flüssigkeitsdosiervorrichtungen
AU1074102A AU1074102A (en) 2000-11-03 2001-10-30 Liquid dosing devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP00309776A EP1203844A1 (fr) 2000-11-03 2000-11-03 Dispositifs de dosage de liquide
EP00309776.3 2000-11-03

Publications (1)

Publication Number Publication Date
WO2002036894A1 true WO2002036894A1 (fr) 2002-05-10

Family

ID=8173366

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/004808 WO2002036894A1 (fr) 2000-11-03 2001-10-30 Dispositifs de dosage de liquide

Country Status (7)

Country Link
US (1) US20040025233A1 (fr)
EP (2) EP1203844A1 (fr)
AT (1) ATE352677T1 (fr)
AU (1) AU1074102A (fr)
DE (1) DE60126308T2 (fr)
ES (1) ES2278791T3 (fr)
WO (1) WO2002036894A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0123250D0 (en) * 2001-09-27 2001-11-21 Globol Chem Uk Ltd A dispenser
US20070009787A1 (en) * 2005-05-12 2007-01-11 Straubel Jeffrey B Method and apparatus for mounting, cooling, connecting and protecting batteries
NL1032616C1 (nl) * 2006-10-03 2008-04-04 Nicolette De Vries Doseerinrichtingen.
KR20170070649A (ko) * 2015-12-14 2017-06-22 에스프린팅솔루션 주식회사 화상형성장치, 클라우드 서버, 화상형성시스템 및 화상형성장치와의 연결 설정 방법
CN113605504B (zh) * 2021-07-29 2023-05-05 潮州市威伦卫浴有限公司 一种自清洁抽水式马桶水箱

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992020876A1 (fr) * 1991-05-17 1992-11-26 Brookline Delta Limited Dispositif de liberation
US5597255A (en) * 1995-06-06 1997-01-28 Yager; Timothy J. Liquid container with applicator
WO2000049238A1 (fr) * 1999-02-16 2000-08-24 Reckitt Benckiser France Distributeur de produit pour cuvette de toilettes
EP1046755A1 (fr) * 1999-04-19 2000-10-25 Sara Lee/DE N.V. Dispositif de nettoyage et de rafraíchissement suspendu au bord d'une cuvette de toilette

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1001722C2 (nl) 1995-11-22 1997-05-23 Sara Lee De Nv Reinigings- en verfrissingseenheid bestemd om te worden opgehangen aan een toiletpotrand.
CA2393945C (fr) * 1999-12-14 2006-02-07 S.C. Johnson & Son, Inc. Nettoyant liquide pour cuvette de wc fixe au rebord de la cuvette

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992020876A1 (fr) * 1991-05-17 1992-11-26 Brookline Delta Limited Dispositif de liberation
US5597255A (en) * 1995-06-06 1997-01-28 Yager; Timothy J. Liquid container with applicator
WO2000049238A1 (fr) * 1999-02-16 2000-08-24 Reckitt Benckiser France Distributeur de produit pour cuvette de toilettes
EP1046755A1 (fr) * 1999-04-19 2000-10-25 Sara Lee/DE N.V. Dispositif de nettoyage et de rafraíchissement suspendu au bord d'une cuvette de toilette

Also Published As

Publication number Publication date
AU1074102A (en) 2002-05-15
ES2278791T3 (es) 2007-08-16
US20040025233A1 (en) 2004-02-12
EP1203844A1 (fr) 2002-05-08
DE60126308D1 (de) 2007-03-15
EP1330578A1 (fr) 2003-07-30
ATE352677T1 (de) 2007-02-15
DE60126308T2 (de) 2007-10-31
EP1330578B1 (fr) 2007-01-24

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