EP0893091A2 - Machine à laver la vaisselle avec dispositif pour distribuer des agents de lavage et procédé de lavage - Google Patents

Machine à laver la vaisselle avec dispositif pour distribuer des agents de lavage et procédé de lavage Download PDF

Info

Publication number
EP0893091A2
EP0893091A2 EP98113493A EP98113493A EP0893091A2 EP 0893091 A2 EP0893091 A2 EP 0893091A2 EP 98113493 A EP98113493 A EP 98113493A EP 98113493 A EP98113493 A EP 98113493A EP 0893091 A2 EP0893091 A2 EP 0893091A2
Authority
EP
European Patent Office
Prior art keywords
wash
recess
detergent
phase
dishwashing machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98113493A
Other languages
German (de)
English (en)
Other versions
EP0893091A3 (fr
EP0893091B1 (fr
Inventor
Giuseppe Marchitto
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.)
Whirlpool EMEA SpA
Original Assignee
Merloni Elettrodomestici 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 Merloni Elettrodomestici SpA filed Critical Merloni Elettrodomestici SpA
Publication of EP0893091A2 publication Critical patent/EP0893091A2/fr
Publication of EP0893091A3 publication Critical patent/EP0893091A3/fr
Application granted granted Critical
Publication of EP0893091B1 publication Critical patent/EP0893091B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
    • A47L15/4409—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants by tipping containers or opening their lids, e.g. with the help of a programmer

Definitions

  • the present invention relates to a dishwashing machine comprising a washing agents dispenser device, and a washing method thereof.
  • washing machines usually provide a plurality of different operating cycles or programs; such cycles have different features and can either be selected by the machine user according to washing requirements, or they may even be selected by the machine itself based on the data related to the type of crockery load to be washed.
  • dishwashing machines presently available in trade are usually equipped with the following wash programs:
  • All these wash programs (apart the soak cycle) provide a main wash step, usually a hot washing, which is mainly responsible for the quality results of the selected whole wash program.
  • the so-called "wash” and “hot rinse” phases are obtained by adding special washing agents and rinse aids, which have to be introduced by the user in a proper dispenser device. Also in the instance of an intensive wash program, the so-called "hot prewash” phase can be executed with the introduction of washing agents.
  • dishwashers are provided with proper dispenser devices comprising separated recesses or compartments to contain specific washing agents for the above phases covered by a wash program; typically, such washing agents consist of powder detergent delivered during the wash step and of a liquid additive, e.g. a rinse aid delivered during the hot rinse phase.
  • a wash program typically, such washing agents consist of powder detergent delivered during the wash step and of a liquid additive, e.g. a rinse aid delivered during the hot rinse phase.
  • a liquid additive e.g. a rinse aid delivered during the hot rinse phase.
  • the same detergent introduced for the wash phase will be used, introducing it in the tub before starting washing operation.
  • the dispenser device generally consists of a body housed in the inner door panel of the front loading door of the dishwashing machine; such a body comprises at least a recess to contain the required detergent dose for the execution of the washing phase; such a recess is provided with a small lid that is opened by the machine programmer at a given time during the washing program (i.e. at the beginning of the hot wash phase).
  • the body of the dispenser device also has a distributor containing the liquid additive to be delivered during the hot rinse phase.
  • some dispenser devices may be equipped with an additional recess, which is separated from the compartment containing the detergent for the wash phase.
  • the small lid closing the recess for the wash detergent is extending to cover also said additional recess; however, the latter has an opening in its lower section, so that when the door of the dishwashing machine is closed (i.e. going from a horizontal position to an upright position), the main quantity of detergent contained in such an additional recess can fall down in the wash tub and be used during the initial prewash.
  • such an additional recess is meant to contain the detergent required to execute the hot prewash phase provided by the so-called intensive wash program; should the user wish to execute such a cycle, then both the recesses for the wash phase and for the prewash phase need to be filled with washing agents.
  • the present invention is based on the acknowledgment of the fact that, following the execution of exhaustive practical tests, a considerable advantage has been noticed in using washing agents already during the initial phase of any wash program, even if it is not a hot phase. Specifically, it was noted by the inventor that during the initial phase of a wash program, washing agents tend to exert on the crockery, besides their own chemical-physical action, a considerable mechanical action in removing the soil from them.
  • the present invention is also based on the acknowledgment that users are mainly interested to have dishwashing machines being of simple and fast use, so that it might be difficult to 'educate” such users to always proceed to a specific introduction of washing agents to be used during the initial phase of a wash program.
  • the aim of the present invention is to provide a dishwashing machine wherein, during the first phase of any selectable wash cycle, an automatic introduction of detergent in the wash tub is carried out, but without requiring a specific decision by the user or any operations differing from the simple introduction of the detergent for the wash phase in the machine dispenser device.
  • the dishwashing machine according to the present invention is intended to provide operation as usually known, save for the special embodiment of its washing agents dispenser device.
  • the dishwasher shall not be further described and detailed in its whole. It will be enough to mention that the dishwashing machine according to the present invention, indicated as a whole with A in Fig. 1, is equipped with a washing agents dispenser device 1, being housed in the inner door panel B of the dishwashing machine, i.e. on the door surface directed to the inside of the machine wash tub C.
  • said dispenser device 1 comprises a box-like body 2 containing a distributor 3 for liquid additive; since said distributor 3 is known as such, no detailed description of it will follow.
  • Reference number 4 indicates a recess defined in the body 2 to contain powder detergent; number 5 indicates a small lid hinged on its upper section to the body 2.
  • the small lid 5 can rotate around an axis indicated with X.
  • a proper locking system controlled by the dishwasher programmer is provided on the body 2; also this system is not shown in the figures for simplicity's sake, as its type and operation are known.
  • Fig. 3 shows the internal surface of a small lid 5 substantially similar to the one shown in Fig. 2.
  • the internal section of the small lid 5 has a gasket 7, in rubber or similar material; when the small lid 5 is closed, said gasket 7 is substantially pressed along the perimeter defined by the walls of the recess 4.
  • a plurality of properly located gaps or thickness reductions are defined along the gasket 7, determining some openings or ports, which put the internal side of the recess 4 in communication with the external environment; in particular, said ports are so calibrated and located along the gasket 7 to allow for a given throughflow of the washing liquid inside the recess 4, even with the small lid 5 closed.
  • numbers 8 and 9 indicate some ports to allow a liquid inflow inside the recess 4
  • numbers 10 and 11 indicate some ports for the outflow from the recess 4 of that same liquid carrying detergent with it.
  • inlet ports 8-9 are located along the upper side of the perimeter defined by the gasket 7, whereas outlet ports 10-11 are located on the right and left sides of the same perimeter.
  • the dishwashing machine following a proper location and dimensioning of said inlet ports 8-9 and outlet ports 10-11, a delivery of a given quantity of washing agents can be obtained, already during the initial phase of a wash cycle.
  • operation of the dishwashing machine according to the present invention is as follows.
  • the user of the machine A loads the crockery to be washed inside the was tub C, the detergent in the recess 4 and closes the small lid 5; if required, the user may also load the rinse aid in the distributor 3.
  • the user can close the machine door, select a desired wash cycle (e.g. the standard cycle) and start the machine operation.
  • a desired wash cycle e.g. the standard cycle
  • the wash tub C is filled in a known manner with a certain quantity of water, that will be sprayed on the crockery through a well known recirculation pump and well known sprinkler elements.
  • Some of the water sprayed in the tub by the sprinklers reaches the dishwasher inner door panel B and the dispenser 1, and a tiny part of it enters the recess 4 through ports 8-9 (located on the upper section of the dispenser 1 with the door closed). Then the inflow of the same water flows out of the recess 4 through ports 10-11, carrying some detergent towards the bottom of the wash tub.
  • Such part of detergent which is mixed with the water being present on the bottom of the wash tub, is then circulated by the above pump and sprinklers, and be sprayed on the crockery.
  • the mechanical/abrasive properties of the detergent can be used during the first phase of the machine wash cycle, as described at the beginning of this description.
  • this fact allows for obtaining a substantial removal of soil during the first wash phase alone, independently from the water temperature.
  • the prewash phase comprised in the various selectable wash cycles of dishwashers has, on average, a duration of a few minutes; consequently, since during such a short period of time only a restricted quantity of water can flow through the recess 4, only a portion of the washing agents contained in it will be removed. Moreover, due to the short time interval lasting between the prewash phase and the subsequent real wash phase, it is not possible for the detergent to clot and get stuck inside the small lid door 5, and be no more removable.
  • the machine programmer will control the opening of the cited locking system of the small lid 5. In this way, the small lid 5 can open up and let the detergent still available in the recess 4 fall down into the wash tub.
  • the dispenser device 1 comprises only one recess 4 to contain the powder detergent
  • the user is practically compelled to use such a recess to introduce the detergent required for the execution of the wash cycle.
  • a part of said detergent is used during the first phase of the cycle, but without requiring specific decisions by the user, who does not need to execute any additional operations with respect to the ones normally required on any dishwashing machines of known type.
  • the ports provided for the water inflow to the recess 4 do not necessarily need to be made on the gasket 7, as they may even consists of proper openings or ports obtained directly on the small lid 5, or along the edges of recess 4.
  • the gasket 7 could be housed in a proper seat on the body 2 of the dispenser 1 instead of being associated with the small lid 5.
  • Fig. 4 shows another possible embodiment of a part of the washing agents dispenser device of the dishwashing machine according to the present invention; in this figure showing a recess 4 with a relevant small lid 5, the same reference numbers of the previous figures are used for indicating technically equivalent elements.
  • number 5A indicates a septum or wall, departing at right angle from the internal surface of the small lid 5; such a septum 5A can be inserted in the recess 4 when the small lid 5 is closed and divide the detergent contained in the recess 4 in two portions.
  • At least a lower port is present, indicated with 5B (with reference to Fig. 4), and one or more openings on its surface, indicated with 5C.
  • the gasket 7 has a gap in line with the port 5B.
  • the recess 4 and the left part of the small door 5 are of a classic concept; when the small lid 5 is closed, in fact, the gasket 7 is able to ensure a nearly hermetic seal inside of the part of the recess 4 extending to the left with respect to the septum 5A.
  • the dishwashing machine operates as follows. After introducing the detergent in the recess 4, the user closes the small lid 5; this will cause the septum 5A to divide the detergent contained inside the recess 4 in two portions.
  • the septum 5A will warrant a satisfactory seal on the left side of the recess 4, where is contained the portion of detergent to be used for the subsequent wash phase.
  • the machine programmer will control the opening of the locking system of the small lid 5 during the subsequent hot wash phase.
  • the small lid 5 can open and let the detergent still contained on the left side of the recess 4 fall into the wash tub.
  • the outlet port 5B may be obtained on the body 2 rather than on the small door 5; similarly, the openings 5C of the small lid 5 may be replaced by one or more openings defined in the upper section of the recess 4 (e.g. thickness reductions of the gasket 7).
  • the new operative mode according to the present invention is therefore implemented in the initial phase of all wash cycles provided by the dishwasher.
  • the septum 5A may operate as a blade for breaking up a known detergent tablet in two pieces.
  • detergent tablets could be manufactured with an intermediate restriction or thickness reduction, right with the purpose of favoring an automatic separation by the septum 5A when closing the small lid 5.
  • Fig. 5 shows schematically by way of example such an innovative detergent tablet, indicated as a whole with 20.
  • a tablet 20 has two portions 20A and 20B, separated by a thickness reduction 21; in the given example, the portion 20B represents a fraction (half) of the portion 20A.
  • the separation by the septum 5A of the two portions 20A and 20B will be favored by the thickness reduction 21.
  • the lower port 5B of the small lid 5 shall be sufficiently dimensioned to let the tablet portion 20B fall in the wash tub, when closing the dishwasher door.
  • manufacturers of detergent tablets have the opportunity of producing only one tablet identifying two different amounts of detergent, i.e. one for use in the prewash step and the other for the execution of the wash step, or for indicating possible different doses of detergent for different wash phases.
  • the user will only be required to manually separate the two portions of a tablet, insert the largest portion in the dispenser recess destined to contain the washing detergent, the other portion in the additional recess destined to contain the prewash detergent or, should the latter not be provided, directly in the wash tub.

Landscapes

  • Detergent Compositions (AREA)
  • Washing And Drying Of Tableware (AREA)
EP19980113493 1997-07-21 1998-07-20 Machine à laver la vaisselle avec dispositif pour distribuer des agents de lavage et procédé de lavage Expired - Lifetime EP0893091B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97TO000660 IT1293637B1 (it) 1997-07-21 1997-07-21 Macchina lavastoviglie con dispositivo dispensatore di agenti di lavaggio e relativo metodo di lavaggio.
ITTO970660 1997-07-21

Publications (3)

Publication Number Publication Date
EP0893091A2 true EP0893091A2 (fr) 1999-01-27
EP0893091A3 EP0893091A3 (fr) 1999-02-24
EP0893091B1 EP0893091B1 (fr) 2004-09-22

Family

ID=11415887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980113493 Expired - Lifetime EP0893091B1 (fr) 1997-07-21 1998-07-20 Machine à laver la vaisselle avec dispositif pour distribuer des agents de lavage et procédé de lavage

Country Status (4)

Country Link
EP (1) EP0893091B1 (fr)
DE (1) DE69826377T2 (fr)
ES (1) ES2229427T3 (fr)
IT (1) IT1293637B1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1366704A2 (fr) * 2002-04-29 2003-12-03 MERLONI ELETTRODOMESTICI S.p.A. Lave-vaisselle
WO2004021854A1 (fr) * 2002-09-06 2004-03-18 Arçelik A.S. Compartiment pour agent de nettoyage
WO2006067033A1 (fr) * 2004-12-22 2006-06-29 BSH Bosch und Siemens Hausgeräte GmbH Lave-vaisselle
EP1698263A1 (fr) * 2005-03-01 2006-09-06 Electrolux Home Products Corporation N.V. Distributeur de détergent pour lave-vaisselle
CN107411694A (zh) * 2017-09-18 2017-12-01 广东赛普电器制造有限公司 一种可适用于多种类型的洗碗机分配器
WO2023046444A1 (fr) * 2021-09-22 2023-03-30 BSH Hausgeräte GmbH Lave-vaisselle domestique

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7083071B1 (en) 2000-06-08 2006-08-01 Beverage Works, Inc. Drink supply canister for beverage dispensing apparatus
US7754025B1 (en) 2000-06-08 2010-07-13 Beverage Works, Inc. Dishwasher having a door supply housing which holds dish washing supply for multiple wash cycles
ITTO20030214A1 (it) 2003-03-24 2004-09-25 Merloni Elettrodomestici Spa Macchina di lavaggio comprensiva di dispensatore di agenti
US8808466B2 (en) 2010-10-13 2014-08-19 Whirlpool Corporation Dishwasher detergent dispenser
IT202200012017A1 (it) * 2022-06-07 2023-12-07 Eltek Spa Dispensatore di agenti di lavaggio per lavastoviglie

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8622926U1 (de) * 1986-08-27 1986-10-16 Bosch-Siemens Hausgeräte GmbH, 8000 München Einspülvorrichtung in frontbeschickten Geschirrspülmaschinen
DE3623027A1 (de) * 1986-07-09 1988-01-28 Miele & Cie Zugabevorrichtung in geschirrspuelmaschinen fuer ein insbesondere pulverfoermiges reinigungs- oder spuelmittel
EP0332152A1 (fr) * 1988-03-09 1989-09-13 Bauknecht Hausgeräte GmbH Distributeur de détergents pour machines à laver la vaisselle
DE19717029C1 (de) * 1997-04-23 1998-06-10 Henkel Kgaa Vorrichtung zur Aufnahme und dosierten Abgabe eines Wasch- oder Reinigungsmittels

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3623027A1 (de) * 1986-07-09 1988-01-28 Miele & Cie Zugabevorrichtung in geschirrspuelmaschinen fuer ein insbesondere pulverfoermiges reinigungs- oder spuelmittel
DE8622926U1 (de) * 1986-08-27 1986-10-16 Bosch-Siemens Hausgeräte GmbH, 8000 München Einspülvorrichtung in frontbeschickten Geschirrspülmaschinen
EP0332152A1 (fr) * 1988-03-09 1989-09-13 Bauknecht Hausgeräte GmbH Distributeur de détergents pour machines à laver la vaisselle
DE19717029C1 (de) * 1997-04-23 1998-06-10 Henkel Kgaa Vorrichtung zur Aufnahme und dosierten Abgabe eines Wasch- oder Reinigungsmittels

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1366704A2 (fr) * 2002-04-29 2003-12-03 MERLONI ELETTRODOMESTICI S.p.A. Lave-vaisselle
EP1366704A3 (fr) * 2002-04-29 2006-02-15 Indesit Company s.p.a. Lave-vaisselle
EP2160969A1 (fr) * 2002-04-29 2010-03-10 Indesit Company S.p.A. Lave-vaisselle amélioré
WO2004021854A1 (fr) * 2002-09-06 2004-03-18 Arçelik A.S. Compartiment pour agent de nettoyage
WO2006067033A1 (fr) * 2004-12-22 2006-06-29 BSH Bosch und Siemens Hausgeräte GmbH Lave-vaisselle
EP1698263A1 (fr) * 2005-03-01 2006-09-06 Electrolux Home Products Corporation N.V. Distributeur de détergent pour lave-vaisselle
WO2006092232A1 (fr) 2005-03-01 2006-09-08 Electrolux Home Products Corporation N.V. Distributeur de produit vaisselle pour lave-vaisselle
CN101132727B (zh) * 2005-03-01 2012-08-01 伊莱克斯家用产品股份有限公司 用于洗碗机的清洁剂分配器
CN107411694A (zh) * 2017-09-18 2017-12-01 广东赛普电器制造有限公司 一种可适用于多种类型的洗碗机分配器
CN107411694B (zh) * 2017-09-18 2023-06-06 广东赛普电器制造有限公司 一种可适用于多种类型的洗碗机分配器
WO2023046444A1 (fr) * 2021-09-22 2023-03-30 BSH Hausgeräte GmbH Lave-vaisselle domestique

Also Published As

Publication number Publication date
EP0893091A3 (fr) 1999-02-24
IT1293637B1 (it) 1999-03-08
DE69826377D1 (de) 2004-10-28
EP0893091B1 (fr) 2004-09-22
DE69826377T2 (de) 2005-09-29
ES2229427T3 (es) 2005-04-16
ITTO970660A1 (it) 1999-01-21

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