EP1228736A2 - Lave-vaisselle domestique avec dispositif de distribution de produits de lavage et programme de lavage correspondant - Google Patents

Lave-vaisselle domestique avec dispositif de distribution de produits de lavage et programme de lavage correspondant Download PDF

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Publication number
EP1228736A2
EP1228736A2 EP02002304A EP02002304A EP1228736A2 EP 1228736 A2 EP1228736 A2 EP 1228736A2 EP 02002304 A EP02002304 A EP 02002304A EP 02002304 A EP02002304 A EP 02002304A EP 1228736 A2 EP1228736 A2 EP 1228736A2
Authority
EP
European Patent Office
Prior art keywords
dishwashing machine
washing
machine according
sub
washing agent
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.)
Withdrawn
Application number
EP02002304A
Other languages
German (de)
English (en)
Other versions
EP1228736A3 (fr
Inventor
Guiseppe 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 EP1228736A2 publication Critical patent/EP1228736A2/fr
Publication of EP1228736A3 publication Critical patent/EP1228736A3/fr
Withdrawn legal-status Critical Current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
    • A47L15/4463—Multi-dose dispensing arrangements

Definitions

  • the present invention concerns a household dishwashing machine comprising a dispensing device of washing agents and a wash program thereof.
  • household dishwashing machines usually perform a plurality of different operation cycles or programs, which can be selected by the user according to washing requirements.
  • dishwashing machines presently on the market usually perform the following wash programs:
  • All these programs (save for the soaking program) provide a normally hot main wash, which is the greater responsible for the quality of the whole wash program selected on the machine.
  • washing and hot rinse steps are always performed adding proper washing agents and rinse aids, which are filled by the user in a suitable dispensing device; in some instance, at least one of the so-called “prewash” steps can also be performed adding a detergent.
  • appropriate dispensing devices can be provided in the dishwasher, which comprise separate compartments or tanks for containing specific washing agents for the above steps provided by a wash program; typically, these washing agents are provided in solid form, i.e. either powder or a tablet, being dispensed during the washing step, and a liquid additive, e.g. a rinse aid being dispensed during the hot rinse step.
  • these washing agents are provided in solid form, i.e. either powder or a tablet, being dispensed during the washing step, and a liquid additive, e.g. a rinse aid being dispensed during the hot rinse step.
  • the dispensing device usually consists of a body housed in the inner door of the front loading door of the dishwashing machine; this body comprises at least a compartment for containing a single dose of washing agent required for executing the washing step; this compartment has a small cover, which is opened at the appropriate time of the wash cycle by the programming device of the machine; thus, the entire single dose of washing agent in solid form is discharged in the washing tub substantially at the beginning of the hot wash step.
  • a dispenser is also usually provided for the liquid rinse aid to be dispensed during the hot rinsing step.
  • some dispensing devices can be fitted with an additional compartment, which is separated from the compartment containing the dose of washing agent for the wash step.
  • the small cover closing the compartment for the washing agent extends farther to cover this additional compartment as well, but the latter has some outlets either on its front side or lower side: therefore, when the door of the dishwasher is closed (i.e. moving from its horizontal position to a vertical position), most of the washing agent contained in said additional compartment will fall down by gravity into the washing tub to be used during the first prewash step.
  • this additional compartment is specifically provided for containing the washing agent required for the first prewash step; therefore, the user has to fill both the compartment for the wash step and the compartment for the prewash step with the washing agent.
  • washing agent for the first prewash step
  • the user wishing to use a washing agent for the first prewash step will necessarily have to introduce a little amount of washing powder (which is the same powder used for the wash steps) directly in the machine washing tub before closing the machine door and starting machine operation.
  • dispensing devices wherein the compartment for the single dose of washing agent has some passages, being apt for a calibrated water inlet during the initial time of the wash cycle.
  • a small volume of water can flow through these passages into the compartment of the washing agent and to bring a certain portion of it into the washing tub during the prewash step; thereafter, when starting the hot wash step, the machine programmer will open the small cover of the compartment of the washing agent, and let its residual portion fall by gravity into the washing tub.
  • the present invention is based on the acknowledgement that the technique previously mentioned does not ensure adequate utilization of the single dose of washing agent introduced in the machine, i.e. to obtain an optimal utilization of its capability for improving the quality of washing.
  • the solutions presently known do not ensure an efficient dosage of the washing agent for performing one or more prewash steps.
  • a nearly complete dispensing in one time of the single dose of solid washing agent at the beginning of the main wash step entails a fast exhaustion of the chemical-physical action of the washing agent during only the first part of the step.
  • the household dishwashing machine object of the present invention has a known manufacture and operation, save for the special form of its dispensing device of washing agents, as further described. Therefore, this dishwasher will not be further described and illustrated in the following. It will be enough to remember here that such a dishwashing machine has at least:
  • reference 1 indicates in its whole the above dispensing device of the dishwashing machine object of the present invention; to this purpose the dispenser 1 is fastened preferably movable with common hooking means to the inner door of the machine.
  • the device 1 comprises a boxed body 2 made from plastic material, with a compartment 3 delimited in its upper section for containing a single dose of washing powder, i.e. an amount of washing agent as required for executing one wash cycle; the amount of washing agent that can be contained in the compartment 3 is substantially similar to the amount that can be contained in the known single-dose dispensers with a movable cover as mentioned at the beginning of the present description.
  • the compartment 3 in the form of a hopper comprises an upper cover 4, eventually fitted with a suitable sealing gasket (not visible in the figure) and a lower port, indicated with 5.
  • an area or dosing chamber 6 in communication with it is delimited in the body 2, housing a dosing and dispensing element 7; on its lower section, the dosing chamber 6 has a discharge outlet 8 in communication with the inside of the washing tub of the machine.
  • the element 7 comprises a rotary element delimiting a couple of radial recesses 7A and 7B opposite to each other; each recess 7A and 7B being apt to contain a volumetric defined amount of washing agent, i.e. equalling a part or fraction of the single dose contained in the compartment 3.
  • the element 7 comprises a main shaft 7C with appropriate sealing means and coupling means to a suitable actuator, solidly fastened inside the dishwasher door; these means are not represented in the figure, since they are commonly known as such.
  • the user of the dishwasher Before starting a wash cycle, the user of the dishwasher opens the upper cover 4 to fill the compartment 3 with the single dose of washing agent required for cycle execution; then the cover 4 is closed again (it should be noticed how filling the compartment 3 with the washing agent can be performed also with the machine door half open).
  • the washing agent While filling the washing agent, a portion of it will reach by gravity through the port 5 the recess 7A of the element 7 in line with the port 5; thus, the recess 7A is filled with a defined dose of washing agent.
  • the control system of the machine will instruct the device 1 at the appropriate time.
  • the actuator previously mentioned causes rotation of the shaft 7C and consequently of the element 7, which is caused to move angularly by about 180°.
  • the recess 7A is brought in line with the discharge outlet 8, and the amount of washing agent contained in the same recess can freely fall into the machine tub for the washing of the crockery.
  • the control system will instruct again the actuator of the device 1 for dispensing a new portion of washing agent; as it can be guessed, this is obtained exactly as described above, i.e. causing the element 7 to start rotation until the recess 7B is brought in line with the discharge outlet 8; moreover, a new filling of the recess 7A is obtained performing the same movement.
  • the dishwasher control system is programmed for controlling a first dispensing of washing agent already during a prewash step provided by the cycle, even if cold performed, in order to utilize the mechanical/abrasive properties of the washing agent itself; actually, a substantial dirt removal is already obtained with the first wash step, independently from water temperature.
  • a likely second prewash step also a cold one, provided by the chosen cycle.
  • the machine control system can be programmed for several actuations of the device 1 in the subsequent main wash step, to obtain dispensing washing agent portions or fractions at separate times.
  • two or more separate dispensing of washing agent can be obtained within one same main wash step; for instance, a first dispensing conveniently can be performed at the beginning of that step, when the wash liquid has not yet reached a stable temperature, and a second dispensing can be performed after a certain time has elapsed since the starting of that step, when the temperature is assumed to have been reached (on the other hand, temperature value may also be detected through appropriate sensing means); thus, during the first part of the wash step (i.e. after the first dispensing), the mechanical/abrasive properties of the washing agent can be fully utilized, whereas the physical/chemical properties of the washing agent will be fully utilized during the second part of the wash step (i.e. after the second dispensing).
  • the steps for obtaining at least one dispensing of washing agents and the steps for dispensing the washing agent several times are established during the design stage of the machine control system, dependently on the wash cycle the user is going to choose and on the capacity of the compartment 3.
  • the invention has been described with reference to a washing powder dispenser comprising an angular rotary dosing/dispensing element type; however it is clear for the man skilled in the art that the dispenser may have a different concept, though maintaining the idea of providing such means capable of "fractioning" the initial single dose of washing agent in several sub-doses of defined quantity, and means capable of dispensing these sub-doses at separate times; in this frame, the dosing element 7 may have for instance a different form than the one described and also comprise, for instance, one sole dosing recess for the washing agent or be structured like a sliding drawer.
  • Fig. 2 is illustrated a possible embodiment of the invention, which provides a linear movable dosing element instead of an angular moving one; it should be noticed how in this figure the same reference numbers of Fig. 1 are used for technical equivalent elements.
  • the dispensing device of Fig. 2, indicated with 1' in its whole, comprises a boxed body 2 made from plastic material, with a compartment 3 delimited in its upper section for containing a single dose of washing powder.
  • the compartment 3 in the form of a hopper comprises an upper cover 4, eventually fitted with a suitable sealing gasket (not visible in the Figure), and a lower port 5.
  • a sliding seat 6 is delimited in the body 2, which houses a dosing and dispensing element 7'; the body 2 has a lower discharge outlet 8 communicating upwards inside the seat 6 and downwards inside the machine washing tub; as it can be noticed, the discharge outlet 8 is shifted with respect to the port 5.
  • the element 7' comprises a linear sliding element, in which a through-cavity 7A' is delimited; this through-cavity 7A' is apt to contain a volumetric defined amount of washing agent equalling to a part or fraction of the single dose contained in the compartment 3.
  • the linear movement of the element 7' in its relevant seat 6 is obtained by means of an appropriate common actuator, such as a thermal actuator 9, fitted with a shaft or piston 9A.
  • the user of the dishwasher Before starting a wash cycle, the user of the dishwasher opens the top cover 4 to fill the compartment 3 with the single dose of washing agent required for executing the cycle; the cover 4 can be closed again (it should be noticed that filling the washing agent in the compartment 3 can also be performed with the machine door half open). The user can then close the dishwasher door and start the wash cycle.
  • the control system of the machine will instruct the device 1' at the appropriate time for dispensing the washing agent.
  • the actuator 9 is power supplied to let its piston 9A cause translation of the element 7', which will move linearly to the right (with reference to Fig. 2).
  • the cavity 7A' is brought in line with the discharge outlet 8 and the amount of washing agent contained in the same cavity is now free to fall down in the machine washing tub for the washing of the crockery.
  • the control system will be able to instruct the actuator 9 of the device 1' again for dispensing a new portion of washing agent; as it can be guessed, this is obtained exactly as described above, i.e. moving the element 7' linearly, until the cavity 7A' is brought in line with the discharge outlet 8; moreover, a new filling of the cavity 7A' is eventually obtained once more with the subsequent return of the element 7'.
  • the embodiment of the device 1' illustrated in Fig. 2 further comprises a second compartment indicated with 3A, being apt to receive a common detergent tablet, indicated with PD.
  • This compartment 3A has a lower port 5A communicating with the seat 6; the seat 6 has an end outlet 8A, in communication with the inside of the machine washing tub.
  • the user of the dishwasher Before starting a wash cycle, the user of the dishwasher opens the upper cover 4 to insert the detergent tablet PD in the compartment 3A, required for performing the cycle; following the closure of the cover 4, the user can close the door of the dishwasher and get the wash cycle started.
  • the former When introducing the tablet PD in the compartment 3A, the former will reach the seat 6 and rest on its bottom; thus, as it can be seen, a portion of the tablet PD is positioned inside the seat 6, whereas the remaining portion of the tablet PD remains inside the compartment 3A.
  • the machine control system will instruct the device 1' at the appropriate time, as for the procedures previously described.
  • the actuator 9 is power supplied to let its piston 9A cause a movement of the element 7', which will move linearly to the right, with reference to Fig. 2.
  • the front surface of the element 7 will press the portion of the tablet PD in the seat 6 and break it; the portion removed from the tablet, indicates with PD1 in Fig. 4, is pushed by the element 7' outside the discharge outlet 8A to fall into the machine tub for the washing of the crockery.
  • the remaining portion of the tablet indicates with PD2 in Fig. 2, remains inside the compartment 3A.
  • the control system will instruct the actuator 9 of the device 1' again for dispensing a new portion of the tablet; as it can be guessed, this is obtained exactly as described above, i.e. moving the element 7' linearly until the front end of the latter breaks the portion PD2 of the tablet in two parts, of which the lower one is expelled through the discharge outlet 8A; moreover, a subsequent return of the element 7' will cause the remaining part of the detergent tablet to reach its position inside the seat 6, as previously described.
  • the front part of the dosing element 7' may have a form favouring the breakage of the detergent tablet; this front part could be e.g. in the form of a blade.
  • special detergent tablets may be provided with appropriate precut lines during their manufacturing stage, or with thinner areas for easier division of the tablet in several parts; also, the single dose of washing agent for executing a wash cycle may consists of a plurality of detergent tablets of smaller size; in this instance, the various tablets would be placed in the compartment 3A one on top of the other, with the movement of the element 7' simply causing the expulsion of one of them during each dispensing operation.
  • dishwasher according to the invention will be preferably fitted with a common rinse aid dispenser, which can be provided as a separate component for the dispenser 1 or 1', or be either associated or integrated to it.
  • the invention also ensures practical advantages in view of an easy use of the dishwasher.
  • the dispensing device 1 comprises only one dedicated compartment 3 and/or 3A for containing the dose of washing agent, the user is actually compelled to use this compartment for the entire dose of washing agent required for performing the wash cycle, either powder or in the form of a tablet.
  • this washing agent can be used during the first cycle step (first and/or second prewash), without requiring any specific decisions by the user, who has no additional operations to perform besides the ones normally required for common dishwashing machines.
  • the part of the dispenser 1 or 1' facing inside the washing tub can be removed from the machine door, it can be completely washed manually any time it is necessary.
  • a first fraction of the single dose of washing agent can be used during a prewash step of the cycle being executed; the device 1 or 1' also ensures dispensing of a second portion of the single dose of washing agent within a second prewash step of the cycle, should this step be provided in the program.
  • the device 1 or 1' also ensures a plurality of dispensing operations within one same step of the wash cycle; in this frame, the machine control system will instruct dispensing of a third and fourth portion of the single dose of washing agent at separate times during the main hot wash step provided by the cycle.
  • the use of a single dose of washing agent introduced in the machine can be optimised for an increased quality of the washing.
  • the dispenser cover 4 may have some apertures in line with the compartment 3A to let in a restricted volume of washing water for a preliminary soaking of the tablet PD, before dispensing is performed as described above.
  • the machine control system may be programmed to realize, when approaching the end of the main wash cycle, a fast sequence of several actuations of the device 1 or 1', for emptying the compartment 3 and/or 3A completely.
  • Another possible embodiment provides a tilting dispenser cover 4 actuated by means of an elastic element and fitted with an actuation mechanism for opening it automatically.
  • the machine control system may control this mechanism for opening the cover 4, so that the water sprayed inside the tub will reach the compartment 3 and/or 3A, at least for its partial washing.

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  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)
EP02002304A 2001-01-30 2002-01-30 Lave-vaisselle domestique avec dispositif de distribution de produits de lavage et programme de lavage correspondant Withdrawn EP1228736A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO010085 2001-01-30
IT2001TO000085A ITTO20010085A1 (it) 2001-01-30 2001-01-30 Macchina lavastoviglie domestica con dispositivo dispensatore di agenti di lavaggio, e relativo programma di lavaggio.

Publications (2)

Publication Number Publication Date
EP1228736A2 true EP1228736A2 (fr) 2002-08-07
EP1228736A3 EP1228736A3 (fr) 2004-02-11

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EP02002304A Withdrawn EP1228736A3 (fr) 2001-01-30 2002-01-30 Lave-vaisselle domestique avec dispositif de distribution de produits de lavage et programme de lavage correspondant

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EP (1) EP1228736A3 (fr)
IT (1) ITTO20010085A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRN20080065A1 (it) * 2008-12-22 2010-06-23 Indesit Co Spa Macchina e metodo di lavaggio.
IT201700044151A1 (it) * 2017-04-21 2018-10-21 Candy Spa Macchina lavastoviglie con erogatore di detersivo a erogazione multipla
CN111270481A (zh) * 2020-03-02 2020-06-12 珠海格力电器股份有限公司 一种用于洗衣机的洗涤剂盒、洗衣机及控制方法
EP3949824A1 (fr) 2020-08-04 2022-02-09 The Procter & Gamble Company Procédé de lavage automatique de la vaisselle

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR72992E (fr) * 1958-02-27 1960-09-22 Laden Dispositif perfectionné pour l'introduction des produits de traitement dans les machines à laver
DE2715369A1 (de) * 1977-04-06 1978-10-19 Licentia Gmbh Einrichtung zum gesteuerten zufuehren von pulverfoermigen zusaetzen zum spuelwasser in geschirrspuelmaschinen o.dgl.
EP0207520A1 (fr) * 1985-07-05 1987-01-07 AWECO Kunststofftechnik Gerätebau GmbH & Co. KG Machine à laver la vaisselle ou le linge avec distributeur de détergents et/ou de produit de rinçage
DE3920728A1 (de) * 1989-06-24 1991-01-10 Henkel Kgaa Verfahren zum betrieb einer geschirrspuelmaschine und vorrichtung zum durchfuehren des verfahrens
DE4000646A1 (de) * 1990-01-11 1991-07-18 Harald Leitloff Waschmaschine mit selbsttaetiger waschwassermengenregelung
US5167350A (en) * 1988-05-02 1992-12-01 Henkel Kommanditgesellschaft Aut Aktien Detergent dispensing device
DE4219620A1 (de) * 1992-06-16 1993-12-23 Licentia Gmbh Verfahren zur Reinigungsmittelzugabe bei Haushalt-Geschirrspülmaschinen
DE29907312U1 (de) * 1999-04-26 1999-08-05 Hetebrij, Andrea, 46459 Rees Eine mit Stollbruchstellen versehende Reinigungstablette für Spül/Waschmaschinen

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR72992E (fr) * 1958-02-27 1960-09-22 Laden Dispositif perfectionné pour l'introduction des produits de traitement dans les machines à laver
DE2715369A1 (de) * 1977-04-06 1978-10-19 Licentia Gmbh Einrichtung zum gesteuerten zufuehren von pulverfoermigen zusaetzen zum spuelwasser in geschirrspuelmaschinen o.dgl.
EP0207520A1 (fr) * 1985-07-05 1987-01-07 AWECO Kunststofftechnik Gerätebau GmbH & Co. KG Machine à laver la vaisselle ou le linge avec distributeur de détergents et/ou de produit de rinçage
US5167350A (en) * 1988-05-02 1992-12-01 Henkel Kommanditgesellschaft Aut Aktien Detergent dispensing device
DE3920728A1 (de) * 1989-06-24 1991-01-10 Henkel Kgaa Verfahren zum betrieb einer geschirrspuelmaschine und vorrichtung zum durchfuehren des verfahrens
DE4000646A1 (de) * 1990-01-11 1991-07-18 Harald Leitloff Waschmaschine mit selbsttaetiger waschwassermengenregelung
DE4219620A1 (de) * 1992-06-16 1993-12-23 Licentia Gmbh Verfahren zur Reinigungsmittelzugabe bei Haushalt-Geschirrspülmaschinen
DE29907312U1 (de) * 1999-04-26 1999-08-05 Hetebrij, Andrea, 46459 Rees Eine mit Stollbruchstellen versehende Reinigungstablette für Spül/Waschmaschinen

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITRN20080065A1 (it) * 2008-12-22 2010-06-23 Indesit Co Spa Macchina e metodo di lavaggio.
WO2010073085A1 (fr) * 2008-12-22 2010-07-01 Indesit Company S.P.A. Appareil et procédé de lavage
IT201700044151A1 (it) * 2017-04-21 2018-10-21 Candy Spa Macchina lavastoviglie con erogatore di detersivo a erogazione multipla
EP3391800A1 (fr) * 2017-04-21 2018-10-24 Candy S.p.A. Lave-vaisselle avec un distributeur de détergent
CN108720784A (zh) * 2017-04-21 2018-11-02 坎迪股份公司 具有多个分配清洁剂的分配器的洗碗机
RU2765141C2 (ru) * 2017-04-21 2022-01-26 Канди С.П.А. Посудомоечная машина с распределительным устройством для многократной подачи моющего средства
CN111270481A (zh) * 2020-03-02 2020-06-12 珠海格力电器股份有限公司 一种用于洗衣机的洗涤剂盒、洗衣机及控制方法
CN111270481B (zh) * 2020-03-02 2023-11-21 珠海格力电器股份有限公司 一种用于洗衣机的洗涤剂盒、洗衣机及控制方法
EP3949824A1 (fr) 2020-08-04 2022-02-09 The Procter & Gamble Company Procédé de lavage automatique de la vaisselle
WO2022031311A1 (fr) 2020-08-04 2022-02-10 The Procter & Gamble Company Procédé de lavage automatique de la vaisselle

Also Published As

Publication number Publication date
EP1228736A3 (fr) 2004-02-11
ITTO20010085A0 (it) 2001-01-30
ITTO20010085A1 (it) 2002-07-30

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