EP3192425B1 - Water supply device for a household washing machine, in particular a dishwasher, and houshold washing machine having such a device - Google Patents

Water supply device for a household washing machine, in particular a dishwasher, and houshold washing machine having such a device Download PDF

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Publication number
EP3192425B1
EP3192425B1 EP17151402.9A EP17151402A EP3192425B1 EP 3192425 B1 EP3192425 B1 EP 3192425B1 EP 17151402 A EP17151402 A EP 17151402A EP 3192425 B1 EP3192425 B1 EP 3192425B1
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EP
European Patent Office
Prior art keywords
dispenser device
duct
air
break
aperture
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.)
Active
Application number
EP17151402.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3192425A1 (en
Inventor
Giuseppe Borroni
Renzo Ghinato
Andrea Rotta
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.)
TP Reflex Group SpA
Original Assignee
TP Reflex Group SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TP Reflex Group SpA filed Critical TP Reflex Group SpA
Priority to PL17151402T priority Critical patent/PL3192425T3/pl
Publication of EP3192425A1 publication Critical patent/EP3192425A1/en
Application granted granted Critical
Publication of EP3192425B1 publication Critical patent/EP3192425B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • D06F39/022—Devices for adding soap or other washing agents in a liquid state

Definitions

  • the present invention relates to a dispenser device for dispensing a liquid in a washing machine for household use, in particular a dishwasher, according to the preamble of claim 1.
  • Documents GB2155316A and DE2430919A1 relate to a similar dispenser device.
  • the present invention also relates to an associated washing machine for household use, in particular a dishwasher.
  • washing machines particularly dishwashers, comprise a dispenser device for dispensing a washing liquid into the wash tub.
  • Said dispenser device is typically made from plastic material and is positioned outside the wash tub, generally in association with one of the side walls of the washing machine.
  • this type of dispenser device typically consists of a flat, hollow body comprising:
  • first and second half-shells are obtained from plastic material by injection moulding, and are joined together by welding, generally by hot-blade welding.
  • dispenser devices known in the art typically comprise a plurality of components that allow the device to carry out several different functions (hence the name "multifunction device” usually given to dispenser devices); for example, said components may comprise:
  • the air-break devices are necessary to avoid the risk that chemical solutions, dirty water or germ-enriched water may penetrate the drinking water main, especially when a vacuum is generated in the drinking water main (e.g. while maintenance or repair work is being carried out) and the washing machine connected to said water main is turned on at the same time.
  • the dispenser device is usually associated with a softener device that comprises a resin container, which contains ion-exchange resins, and a regeneration tank, which contains an agent (in particular, brine) for regenerating the ion-exchange resins; as a consequence, the dispenser device is so designed as to comprise:
  • the dispenser devices known in the art may even lack a chamber dedicated to collecting the regeneration liquid, since they may be so designed as to comprise a single chamber in which the liquid is collected to be then directed (in particular, via a switching valve) towards the resin container or the regeneration tank.
  • the air-break device must be so designed as to ensure a minimum distance between the tract where the liquid is injected and the tract that receives said liquid. For example, according to some regulations it is necessary that there is a distance of at least 20 mm between the liquid injection tract and any other wall. Consequently, it is clear that the air-break device will take much room inside the washing machine where the dispenser device will have to be installed; this is clearly in contrast to the requirements of modern washing machines, which tend to leave less room available for the various components.
  • a further problem suffered by the solutions known in the art is that, in the event of a malfunction of the dispenser device and/or clogging of the output ducts leading to the tub of the washing machine or to any devices between the dispenser device and said tub, the regular water outflow from the dispenser device will be inhibited; the malfunction of the dispenser device may even prevent the air-break device from performing its function of preventing the liquid from flowing back into the water main.
  • a malfunctioning dispenser device may also cause uncontrolled leakage of liquid outside the dispenser device itself, and such leakage may cause electrical safety problems because it may affect electric components installed in the lower part of the washing machine, or dripping of water onto the floor whereon the washing machine stands.
  • a dispenser device for dispensing a liquid in a washing machine for household use in particular a dishwasher, and a related washing machine comprising said dispenser device, incorporating the features set out in the appended claims, which are an integral part of the present description.
  • Fig. 1 schematically shows an exploded perspective view of a dispenser device for dispensing a liquid in a washing machine for household use, in particular a dishwasher, according to the present invention.
  • reference numeral 1 designates the liquid dispenser device for dispensing a liquid, which comprises an inner cavity, designated as a whole by reference numeral 2; the annexed drawings do not show the washing machine for household use, in particular a dishwasher, that comprises said dispenser device 1.
  • the dispenser device 1 comprises a first half-shell 1A and a second half-shell 1B that are substantially symmetrical and coupled to each other, so as to form said inner cavity 2; as a result, the dispenser device 1 comprises said inner cavity 2 and is, therefore, hollow.
  • said half-shells 1A, 1B can be made from plastic material by injection moulding, and the coupling of the two half-shells 1A, 1B can be accomplished by means of a welding process, in particular a hot-blade welding process, carried out on a perimetric wall 1C of at least one of said half-shells 1A, 1B.
  • the dispenser device 1 may also be so designed as to comprise a monolithic body, in particular made from plastic material by injection moulding, comprising two main faces (typically substantially rectangular in shape) facing each other and connected together by a perimetric wall so as to define an inner cavity.
  • dispenser device 1 is also known in the prior art as a "multifunction device”.
  • the dispenser device 1 as a whole preferably has a flat shape, particularly in order to facilitate the coupling thereof to a wall of the washing machine without taking up too much room; in particular, in an operating condition, the dispenser device 1 is associated with the washing machine in such a way as to prevalently lie in a vertical plane.
  • the dispenser device 1 comprises an air-break device (designated as a whole by reference numeral 10) associated with a supply duct 3 for supplying the liquid coming from the water main, for preventing the liquid from returning into the water main.
  • the supply duct 3 is formed by facing side walls rising in the inner cavity 2.
  • said side walls protrude from one of the half-shells 1A, 1B and are closed by the other half-shell 1A, 1B.
  • said side walls protrude from the first half-shell 1A and are closed by the second half-shell 1B; it is however clear that they may be formed on the second half-shell 1B and closed by the first half-shell 1A.
  • the dispenser device 1 further comprises an aperture 4 for collecting and venting vapours, in particular coming from a wash tub, said aperture 4 being such as to communicate with the inner cavity 2 of the dispenser device 1.
  • said aperture 4 is substantially circular in shape; in particular, it is formed on at least one of the half-shells 1A, 1B of the dispenser device 1; it is clear that, if the dispenser device 1 is made as one monolithic piece, said aperture 4 will be obtained on at least one of the main faces that make up the dispenser device 1.
  • the dispenser device 1 further comprises a first compartment 4A positioned above the aperture 4 (in an operating condition, i.e. when the dispenser device 1 is associated with a washing machine) for venting and/or condensing said vapours coming from the aperture 4, in particular said first compartment 4A comprising a second aperture 4B for draining the vapours out of the dispenser device 1 (e.g. into the environment); preferably, said second aperture 4B is located at the top of the first compartment 4A.
  • the air-break device 10 is positioned in said aperture 4.
  • the air-break device 10 comprises a first half-duct 11 and a second half-duct 12 provided with respective ends facing each other, leaving a gap in between to create the air break.
  • the first half-duct 11 and the second half-duct 12 have a tapered shape, in particular the narrower cross-section consisting of the respective ends, wherein said respective ends are arranged along the same straight line.
  • the ends of the first half-duct 11 and of the second half-duct 12 are positioned at a distance of at least 20 mm, so as to allow the liquid to follow an adequate air path in compliance with the regulations in force in the industry.
  • the end of the second half-duct 12 preferably has a larger cross-section than the end of the first half-duct 11, so that it can receive the liquid coming from said first half-duct 11.
  • the air-break device 10 is preferably of the "injection” type (also known as “AD type”), since the first half-duct 11 forms an injector (that can also be defined as a “spray nozzle”), which allows the fluid to flow into the facing second half-duct 12 (which can also be defined as a “collection nozzle”).
  • first half-duct 11 is essentially an extension of the supply duct 3.
  • the first air-break device 10 comprises an insert 10A (of the "injection” or "AD” type) that comprises the first half-duct 11 and the second half-duct 12, both having a tapered shape, and wherein the respective ends are arranged along the same straight line.
  • insert 10A of the "injection” or "AD” type
  • the path for inserting the insert 10A into the aperture 4 is represented by means of a dashed-dotted arrow.
  • the insert 10A comprises a room 13 positioned between the first half-duct 11 and the second half-duct 12, in particular said room 13 having a substantially cylindrical shape.
  • said room 13 has a height (that substantially corresponds to the distance between the ends of the first half-duct 11 and of the second half-duct 12) of approx. 20 mm and a diameter of at least 40 mm. Also, said room 13 comprises a slit 13A allowing the liquid that does not succeed in crossing the air-break device 10 to flow into the aperture 4 (to be then delivered into the tub through said aperture 4).
  • first half-duct 11 and the second half-duct 12 are directly obtained in the aperture 4 of said dispenser device 1.
  • first half-duct 11 and the second half-duct 12 are obtained, in particular by moulding, directly on the first half-shell 1A of said dispenser device 1; it is however clear that the first half-duct 11 and the second half-duct 12 may be obtained, at least partially, on the second half-shell 1B of the dispenser device 1.
  • the particular provisions of the present invention allow overcoming the drawbacks of prior-art dispenser devices by providing a dispenser device 1 which is so designed as to comprise an air-break device 10 that does not take up much room inside the washing machine in which the dispenser device 1 is to be installed.
  • the air-break device 10 is located in an unoccupied space (consisting of the aperture 4 for venting and/or condensing the vapours) that was already present in prior-art devices.
  • the supply duct 3 is associated with a first fitting 3A for connecting the dispenser device 1 to the water main; also, the first fitting 3A is connected to the water main through a suitable pipe associated with an electrovalve controlled by a control unit, in particular of electronic or electromechanical type, of the washing machine (the pipe, the electrovalve and the control unit are not shown in the annexed drawings).
  • a control unit in particular of electronic or electromechanical type, of the washing machine
  • the supply duct 3 can be associated with a volumetric flow meter 3B that allows measuring the liquid being fed into the dispenser device 1.
  • said flow meter 3B is of the turbine type and comprises an impeller fitted with a magnet associated with an element sensing the magnetic field generated by the magnet; for example, said sensing element may be a Reed contact, provided with foils enclosed within an enclosure filled with inert gas, or a Hall-effect sensor.
  • the volumetric flow meter 3B may be integrated into the body of the dispenser device 1, or may be made as a separate unit. As is known, the volumetric flow meter 3B generates signals that are sent to the control unit of the washing machine for the purpose of determining the quantity of liquid flowing through the dispenser device 1.
  • the dispenser device 1 may also comprise a second air-break device (designated as a whole by reference numeral 20) positioned in the inner cavity 2 of the dispenser device 1 and arranged in series with respect to the first air-break device 10.
  • a second air-break device designated as a whole by reference numeral 20
  • the dispenser device 1 may be so designed as to comprise a first air-break device 10 (positioned in the aperture 4) and a second air-break device 20 (positioned in the cavity 2 of the dispenser device 1), which are arranged in succession or consecutively one after the other, in particular with respect to the path followed by the liquid coming from the supply duct 3 and from the water main.
  • the second air-break device 20 comprises a first tract 21 and a second tract 22 provided with respective ends facing each other, leaving a gap in between to create a second air break.
  • the second half-duct 12 of the air-break device 10 is associated with a pipe 5 that leads to the first tract 21 of the second air-break device 20.
  • the end of the second tract 22 preferably has a larger cross-section than the end of the first tract 21, so that it can collect the liquid coming from said first tract 21.
  • the first tract 21 and the second tract 22 are so designed as to give the second air-break device 20 an arched shape; in particular, the first tract 21 and the second tract 22 are joined together by a top wall 20A and the air break essentially consists of a gap between the first tract 21 and the second tract 22, said gap being located under said top wall 20A.
  • first tract 21 and the second tract 22 are directly obtained in said inner cavity 2 of the dispenser device 1; it is however clear that said first tract 21 and second tract 22 may also belong to an insert (not shown) to be inserted into the inner cavity 2 of the dispenser device 1.
  • the second air-break device 20 may be of the "injection" type, i.e. so designed as to have a first tract and a second tract, the respective ends of which are arranged along the same straight line; it has to be noted that such an embodiment is not shown in the annexed drawings.
  • the particular provisions of the present invention allow providing a dispenser device 1 designed to avoid that the regular water outflow from said dispenser device 1 might be inhibited even in case of a malfunction, in particular even in case of clogging of the output ducts leading to the tub of the washing machine and/or to any devices between the dispenser device 1 and said tub.
  • first air-break device 10 and a second air-break device 20 arranged in series and in succession, in particular with respect to the path followed by the liquid, ensures optimal operation while preventing the liquid from flowing back into the water main even in adverse conditions.
  • such provisions allow preventing uncontrolled leakage of water outside the dispenser device, thus preventing electric safety problems and/or dripping of water onto the floor whereon the washing machine stands.
  • the second air-break device 20 is positioned in a second compartment (designated by reference numeral 6) for collecting the liquid that does not succeed in crossing said second air-break device 20; preferably, said second compartment 6 comprises a window 6A that will allow the liquid to escape if the second compartment 6 is overfilled.
  • said second compartment 6 is in communication with said aperture 4 for collecting the vapours coming from the wash tub; as a result, said aperture 4 also performs the function of delivering into the wash tub of the washing machine the liquid that does not succeed in crossing the air-break device 10 and/or the second air-break device 20.
  • said window 6A contributes to ensuring optimal operation of the dispenser device 1 and preventing the liquid from returning into the water main even in adverse conditions; in particular, said window 6A cooperates with the air-break device 10 and/or with the second air-break device 20 in order to attain such purpose.
  • the dispenser device 1 further comprises a collection chamber 7 into which the liquid coming from the second half-duct 12 of the air-break device 10 and/or from the second tract 22 of the second air-break device 20 can enter; said collection chamber 7 is associated with a second fitting 7A that allows the collection chamber 7 to be connected to a softener device (not shown in the drawings), in particular to a regeneration tank containing an agent (in particular, brine) for regenerating ion-exchange resins.
  • a softener device not shown in the drawings
  • a regeneration tank containing an agent in particular, brine
  • the flow of liquid from the collection chamber 7 to the regeneration tank is controlled by an electrovalve (not shown) controlled by the control unit of the washing machine; as is known, the capacity of the collection chamber 7 is preferably suited to the quantity and/or volume of resins in the resin container.
  • the dispenser device 1 further comprises a partition 8 that allows separating the collection chamber 7 from a channel 9 associated with a third fitting 9A; as a consequence, after having filled the collection chamber 7 and having risen above the level of the partition 8, the liquid will overflow into the channel 9 and will then reach the wash tub, through the third fitting 9A, after having flowed through a softener device (not shown), in particular through a resin container (containing ion-exchange resins) of said softener device.
  • a partition 8 that allows separating the collection chamber 7 from a channel 9 associated with a third fitting 9A; as a consequence, after having filled the collection chamber 7 and having risen above the level of the partition 8, the liquid will overflow into the channel 9 and will then reach the wash tub, through the third fitting 9A, after having flowed through a softener device (not shown), in particular through a resin container (containing ion-exchange resins) of said softener device.
  • the liquid arriving at the first fitting 3A will then proceed (possibly after having been measured by the volumetric flow meter 3B) in the supply duct 3, flow through the air-break device 10, and then enter the collection chamber 7 (possibly after having flowed through the duct 5 and the second air-break device 20).
  • the liquid After having filled the collection chamber 7 and having risen above the level of the partition 8, the liquid will overflow into the channel 9 to reach the wash tub, possibly after having flowed through the resin container of a softener device.
  • the liquid in the collection chamber 7 will be delivered (in particular when an electrovalve is opened) into the regeneration tank in order to regenerate the resins contained in the resin container.
  • the dispenser device 1 may also be so designed that the collection chamber 7 is connected to both a resin container and a regeneration tank of a softener device (not shown in the drawings); for example, such a connection may be obtained by means of a switching element (e.g. a switching valve) allowing the liquid to be directed from the collection chamber 7 to the resin container and/or to the regeneration tank.
  • a switching element e.g. a switching valve
  • the particular provisions of the present invention allow overcoming the drawbacks of prior-art dispenser devices by providing a dispenser device 1 which is so designed as to comprise an air-break device 10 that does not take up much room inside the washing machine in which the dispenser device is to be installed.
  • the air-break device 10 is located in an unoccupied space that was already present in prior-art devices.
  • a further advantage of the dispenser device 1 according to the present invention lies in the fact that it avoids that the regular outflow of water from said dispenser device 1 might be inhibited even in case of a malfunction, particularly even in case of clogging of the output ducts leading to the tub of the washing machine and/or to any devices between the dispenser device and said tub.
  • the peculiar provision of a first air-break device 10 and a second air-break device 20 arranged in series and in succession, in particular with respect to the path followed by the liquid also ensures optimal operation while preventing the liquid from flowing back into the water main even in adverse conditions.
  • a further advantage of the dispenser device 1 according to the present invention lies in the fact that it is so designed as to prevent uncontrolled leakage of water outside the dispenser device 1, thus preventing electric safety problems and/or dripping of water onto the floor whereon the washing machine stands.
  • the dispenser device for dispensing a liquid in a washing machine for household use, in particular a dishwasher, and the related washing machine described herein by way of example may be subject to many possible variations without departing from the novelty spirit of the inventive idea; it is also clear that in the practical implementation of the invention the illustrated details may have different shapes or be replaced with other technically equivalent elements.
  • the numerous possible variants include the option (not shown in the annexed drawings) of associating the insert 10A with a ring nut (not shown) for securing the dispenser device 1 to a washing machine, in particular said ring nut being suitable for being coupled to the aperture 4 of the dispenser device 1.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Washing And Drying Of Tableware (AREA)
EP17151402.9A 2016-01-13 2017-01-13 Water supply device for a household washing machine, in particular a dishwasher, and houshold washing machine having such a device Active EP3192425B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17151402T PL3192425T3 (pl) 2016-01-13 2017-01-13 Urządzenie doprowadzające wodę do urządzenia myjącego do użytku domowego, a w szczególności do zmywarki do naczyń i urządzenie myjące do użytku domowego mające takie urządzenie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUB2016A009967A ITUB20169967A1 (it) 2016-01-13 2016-01-13 Dispositivo distributore di liquido in una macchina di lavaggio di uso domestico, in particolare una lavastoviglie, e relativa macchina di lavaggio

Publications (2)

Publication Number Publication Date
EP3192425A1 EP3192425A1 (en) 2017-07-19
EP3192425B1 true EP3192425B1 (en) 2019-06-26

Family

ID=55806722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17151402.9A Active EP3192425B1 (en) 2016-01-13 2017-01-13 Water supply device for a household washing machine, in particular a dishwasher, and houshold washing machine having such a device

Country Status (4)

Country Link
EP (1) EP3192425B1 (pl)
IT (1) ITUB20169967A1 (pl)
PL (1) PL3192425T3 (pl)
TR (1) TR201911192T4 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112716419B (zh) * 2021-01-22 2025-05-30 佛山市顺德区美的洗涤电器制造有限公司 呼吸器和洗碗机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2430919C2 (de) * 1974-06-27 1985-05-02 Miele & Cie GmbH & Co, 4830 Gütersloh Rückflußverhinderungseinrichtung für eine Wasch- oder Geschirrspülmaschine
DE2560261C2 (de) * 1975-01-25 1983-01-27 Euro Hausgeräte GmbH, 6680 Neunkirchen Zulaufbelüfter für Geschirrspülmaschinen u.dgl.
GB2155316B (en) * 1984-03-13 1988-06-15 Balay Sa Hydraulic feeder having a steam outlet for dishwashers
IT1273159B (it) * 1994-04-27 1997-07-07 Bitron B Spa Dispositivo di regolazione del quantitativo di acqua alimentato ad una vasca di lavaggio di un apparecchio elettrodomestico
ITTO20110984A1 (it) * 2011-10-28 2013-04-29 Bitron Spa Dispositivo distributore di acqua
ITTO20110983A1 (it) * 2011-10-28 2013-04-29 Bitron Spa Dispositivo distributore di acqua monolitico

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
PL3192425T3 (pl) 2019-11-29
TR201911192T4 (tr) 2019-08-21
ITUB20169967A1 (it) 2017-07-13
EP3192425A1 (en) 2017-07-19

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