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WO2016037638A1 - Agencement de distribution d'eau de vaisselle et d'eau de rinçage - Google Patents

Agencement de distribution d'eau de vaisselle et d'eau de rinçage Download PDF

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Publication number
WO2016037638A1
WO2016037638A1 PCT/EP2014/069104 EP2014069104W WO2016037638A1 WO 2016037638 A1 WO2016037638 A1 WO 2016037638A1 EP 2014069104 W EP2014069104 W EP 2014069104W WO 2016037638 A1 WO2016037638 A1 WO 2016037638A1
Authority
WO
WIPO (PCT)
Prior art keywords
rinse
arrangement
water
rinse water
spray nozzles
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.)
Ceased
Application number
PCT/EP2014/069104
Other languages
English (en)
Inventor
Bernd Krische
Magnus Wahlberg
Elianne Lindmark
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.)
Electrolux Appliances AB
Original Assignee
Electrolux Appliances AB
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 Electrolux Appliances AB filed Critical Electrolux Appliances AB
Priority to PCT/EP2014/069104 priority Critical patent/WO2016037638A1/fr
Publication of WO2016037638A1 publication Critical patent/WO2016037638A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • A47L15/4219—Water recirculation
    • A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms
    • 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

Definitions

  • the present invention relates to an arrangement for distribution of water during a wash phase and a rinse phase in a washing chamber of a dishwasher.
  • Dishwashers are used in domestic kitchens for washing for example plates, pots, pans etc, in this application referred to as items to be washed.
  • Dishwashers comprises a washing chamber in which the items to be washed are arranged in one or more baskets to remain in the intended position separated from adjacent items to make it possible for water to circulate within the washing chamber between adjacent items and clean the items.
  • the operational program of dishwashers is started with a washing phase and ended by a rinse phase.
  • water, and detergent added to the water is circulated in the washing chamber by a pump arranged in the lower section of the washing chamber to clean the items to be washed arranged in the washing chamber.
  • the water is lead from the pump via conduits or pipes to one, or more, rotating spray arms provided with a number of nozzles that are spraying water on the items to clean the items.
  • the sprayed water is collected in a sump in the lower part of the washing chamber and led to the pump for repeated use during the washing phase.
  • the dirty water is drained from the washing chamber via the sump and fresh water supplied to the pump from a tap and circulated in the washing chamber to rinse the items in the washing chamber.
  • an ordinary dishwasher of normal size about 6 to 7 litres of fresh water is used for rinsing the items to be washed.
  • the rinse phase is divided into two steps. After the first step is completed the used and contaminated rinse water is drained from the dishwasher and fresh water once again supplied to improve the rinse result during the second step. To shorten the required time for drying the items in the dishwasher the second step is conducted with rinse water that is heated to increase the temperature of the items in the dishwasher and thereby reduce the time required for drying the items in the dishwasher after the rinse phase is completed.
  • the present invention relates to an arrangement for distribution of water during a wash phase and a rinse phase in a washing chamber that to at least some extent fulfils the need defined above.
  • the arrangement for distribution of during a wash phase and a rinse phase in the washing chamber according to the invention comprises:
  • a circulation system comprising a circulation pump, a sump, spray nozzles, and a flow regulator;
  • At least one rinse water tank arranged within the dishwasher and comprising a fresh water inlet
  • the rinse water tank is connected to the circulation system via the flow regulator arranged downstream the sump between the sump and the spray nozzles, and wherein said arrangement is changeable by the flow regulator between a first configuration and a second configuration, in which first configuration said circulation pump is arranged to circulate water collected in the sump to the spray nozzles arranged to distribute water over the items arranged in the washing chamber; and in which second configuration rinse water from the at least one rinse water tank is supplied to the spray nozzles.
  • the arrangement defined above reduces the water consumption during the rinse phase considerably since the flow regulator at the same time as the arrangement is changed from the first configuration to the second configuration closes the conduit connecting the sump with the flow regulator to ensure that the rinse water is kept separated from the diluted areas of the sump and washing chamber and fed to the spray nozzles without being exposed to dilutions and soil remaining in the sump and conduit extending from the sump.
  • the volume of the rinse water tank is large enough to deliver the volume of water required for the entire rinse phase thereby eliminating the need for recirculation of rinse water as in existing dishwashers.
  • One embodiment of the arrangement according to the invention comprises heating means arranged in the at least one rinse water tank to heat the rinse water. This embodiment is very favourable since the rinse water stored in the rinse water tank could be heated easily to a predetermined temperature in an efficient way before the rinse phase is initiated thereby shortening the time required for the rinse phase, as well as the time required for drying the items in the washing chamber.
  • the heating means are resistive heating means arranged in the at least one rinse water tank. Resistive heating means makes it possible to heat the water to a predetermined temperature in a short period of time.
  • means for adding rinse aid additive and / or detergent to the rinse water in the at least one rinse water tank is arranged in the at least one rinse water tank.
  • the fact that the rinse water is stored in the rinse water tank until the rinse phase is initiated makes it possible to add rinse aid additive and / or detergent to the water in an easy way.
  • the added rinse aid additive and / or detergent improve the overall washing and rinsing result of the dishwasher.
  • the at least one rinse water tank has a volume of at least 2 litres and is intended to be connected to a fresh water tap.
  • the defined volume is required to achieve the desired rinse result when the washing chamber is filled with items to be washed.
  • the arrangement comprises two rinse water tanks connected to the flow regulator either in parallel or in series and with a total volume of at least 2 litres. This embodiment is favourable since tanks with a smaller volume are easier to fit in the limited space available within the dishwasher.
  • the circulation system comprises rotating spray arms arranged in the washing chamber and said spray nozzles are arranged on the spray arms.
  • the rotating spray arms ensure that the water distributed from the spray nozzles is reaching the entire area of the washing chamber.
  • rotating spray arms provide a robust and reliable arrangement for distribution of water.
  • the flow regulator is arranged between the sump and the circulation pump. This embodiment is favourable since the circulation pump of the circulation system is used also for feeding rinse water from the at least one rinse water tank which results in a simple and robust arrangement with few components.
  • the flow regulator consists of a valve arranged to switch the arrangement between said first and second configuration.
  • the valve makes it possible to switch between the two different configurations and either circulate washing water within the washing chamber or close the conduit of the circulation system and connect the at least one rinse water tank to the spray nozzles.
  • the flow regulator is arranged between the circulation pump and the spray nozzles. This embodiment further improves the quality of the rinse water since the rinse water fed to the spray nozzles not is flowing through the circulation pump where soils or particles could remain from the initial washing phase.
  • the flow regulator consist of a valve device arranged to switch the arrangement between said first and second configuration, and a rinse water pump arranged to feed water from the rinse water tank to the spray nozzles.
  • the valve device makes it possible to switch between the two different configurations and prevent that water used for washing is fed to the rinse water tank during the washing phase as well as avoid that rinse water is fed to the circulation pump, and eventually the sump, during the rinse phase.
  • the additional rinse water pump must be added in this embodiment since the circulation pump not could be used for this purpose.
  • the arrangement is operated by a control unit connected to the flow regulator to switch the arrangement between the first and second configuration.
  • the present invention also relates to a dishwasher comprising an arrangement for distribution of water during a wash phase and a rinse phase in a washing chamber according to the invention.
  • the present invention also relates to a method for operating the arrangement for distribution of water during a wash phase and a rinse phase in a washing chamber according to the invention.
  • the method comprises the steps:
  • a. operate the arrangement in the first configuration for a predetermined time; b. drain the circulated water from the circulation system;
  • rinse the items arranged in the washing chamber with the rinse water from the rinse water tank.
  • the defined method for distribution of water during the wash phase and the rinse phase within the washing chamber is very advantageous since the rinse water during the rinse phase is sprayed over the items to be washed only once.
  • the use of fresh rinse water improves the rinse result since the rinse water not is mixed with the "carry over" in the sump and washing chamber during circulation as in previous
  • the different steps of the selected dishwasher program are controlled by the control unit that is arranged to activate the flow regulator and switching the arrangement between the different configurations.
  • Figure 1 illustrates a dishwasher interior schematically.
  • Figure 2 illustrates schematically the principles of a first embodiment of the invention.
  • Figure 3 illustrates schematically a second embodiment of the arrangement according to the invention.
  • FIG 1 a perspective schematic view of dishwasher 10 is illustrated.
  • the dishwasher comprise a washing chamber 11 surrounded by a substantially rectangular cabinet 12.
  • the washing chamber 11 comprises an opening 15 in the front side of the dishwasher in order to make the washing chamber 11 accessible during loading and unloading of items in and from the washing chamber.
  • the opening 15 is closed by a door 13 in order to make it possible to access, and close, the opening 15 of the washing chamber 11.
  • an upper (16a) and lower basket 16b for dirty items are arranged at different heights.
  • the baskets are extractable arranged in the washing chamber and formed of thin elements like for example wires or rods in order to provide a basket structure that the water could flow through easily.
  • the dishwasher 10, illustrated in figure 1, comprises two wire baskets 16 arranged on guide rails 17.
  • the lower one is normally used for larger items like plates, pots etc, and the upper one for cups, glasses and smaller items.
  • the number of baskets could however be increased further to comprise for example a third basket for small items such as cutleries arranged in the top of the washing chamber.
  • a user interface 18 normally arranged along the upper front of the dishwasher or in the door.
  • the user interface could for example be one or more buttons, or a touch screen both displaying relevant information regarding the dishwasher and usable for selecting the desired operational program of the dishwasher.
  • most dishwashers could be operated according to a number of programs adapted for different types of items to be washed, energy consumption etc they all comprises a wash phase and a rinse phase, each divided into several different steps.
  • water and detergent are circulated within the washing chamber 11 in order to clean the items packed in the dishwasher baskets.
  • the circulating water will also contain residues from the items to be washed since the residues are mixed with the water during the washing phase.
  • this mixture is referred to as water used during the wash phase.
  • the expression water is intended to cover all possible mixtures of water, additives such as detergent, and residues.
  • the water is heated to a predetermined temperature and mixed with detergent to achieve the desired washing result.
  • the water is circulated in the dishwasher 10 by a circulation system 20 comprising a water circulation pump 21, a sump 22 and spray nozzles 23 connected by suitable conduits.
  • the water is collected and stored in the lower part of the washing chamber in the sump 22.
  • the water is led via one or more filters, not illustrated, from the sump 22 to the water circulation pump 21.
  • the water circulation pump 21 provides the desired pressure in order to feed water via one or more conduits to the spray nozzles 23 and distribute the water over the items in the washing chamber to wash the items before the water returns to the sump 22 by gravity. In order to limit the water consumption, the water is circulated several times during the wash phase. Furthermore, the circulation of the water reduces the energy
  • the circulated water is in the end of the wash phase drained from the washing chamber via a not illustrated water outlet in the lower part of the sump to remove the dirty water from the washing chamber.
  • the washing water could furthermore be drained and replaced with fresh water during the wash phase to improve the washing result during the wash phase.
  • the spray nozzles 23 are either movably arranged on one or more rotating spray arms 24 arranged at different heights in the washing chamber 11 to ensure that the water is spread over the entire area within the washing chamber where the items to be washed are stored.
  • the spray nozzles are stationary arranged on the inside walls, ceiling or a stationary support structure within the washing chamber and directed towards the items to be washed. The number and positions of the spray nozzles 23 are selected such that the desired amount of water could be distributed within the washing chamber and the desired washing result achieved.
  • a further alternative is to arrange the spray nozzles on each of the baskets and directed towards the intended position of the items to be washed stored in the basket.
  • the sump, water circulation pump and spray nozzles are in all embodiments connected by one or more conduits 26 with dimensions suitable for the determined volumes of circulating water.
  • the dishwasher according to the invention furthermore comprises at least one rinse water tank 41 arranged within the dishwasher 10 where there is enough space to fit the rinse water tank 41.
  • the rinse water tank 41 should have enough volume to provide rinse water for the entire rinse phase, i.e. at least a volume of 2 litres.
  • the design of the rinse water tank 41 could be modified in different ways to fit within the space available within the dishwasher and not interfere with the space for items to be washed more than necessary.
  • An alternative embodiment that is easier to fit in the dishwasher comprises two, or more, smaller rinse water tanks connected to each other and with a total volume of at least 2 litres. This solution makes it easier to fit the desired tank volume in the dishwasher but however requires more components which make it more complicated and expensive. Fresh water is supplied to the rinse water tank via a fresh water inlet 46 in the tank and a suitable conduit connected to a tap 60.
  • heating means 42 are arranged in the rinse water tank 41 to heat the rinse water in the tank 41 to a predetermined temperature before the rinse phase is initiated.
  • the heating means 43 are preferably embodied as resistive heating means arranged in the rinse water tank 41 to provide an efficient heating of the water stored in the rinse water tank 41.
  • the rinse water tank 41 comprises means 44 for adding rinse aid additive and / or detergent to the water in the rinse water tank 41. These additives are used depending on the water quality of the present location of the dishwasher in order to improve the final rinse result, reduce the amount of water consumed and shorten the time required for drying the items.
  • the rinse water tank 41 is connected to the circulation system 20 via a flow regulator 50 arranged somewhere along the conduit extending between a water outlet in the bowl shaped sump 22 and the spray nozzles 23.
  • the position where the flow regulator 50 is connected to the conduits extending between the sump 22 and the spray nozzles 23 must be separated from the water outlet in the sump 22 to prevent that the fresh rinse water supplied from the water tank 41 via the flow regulator 50 is mixed with the remaining wash water, particles and soil remain from the washing phase in the sump to provide an efficient rinsing of the items in the dishwasher with as clean rinse water as possible.
  • the flow regulator 50 is arranged to make it possible to switch between the first configuration, used during the wash phase, in which the circulation system is running and the wash water circulated within the dishwasher to clean the items in the washing chamber 11, and the second configuration, used during the rinse phase, in which clean rinse water is fed from the rinse water tank 41 to the spray nozzles 23 and distributed over the items to rinse the items from residuals and detergent remaining from the previously performed wash phase.
  • the flow regulator 50 is in a first embodiment, illustrated in figure 2, arranged along the conduit 26 extending between the sump 22 and the circulation pump 21 of the water circulation system 20, and consisting of a valve arranged to switch the arrangement between said first and second configuration, i.e.
  • the circulation pump 21 is used both during the wash phase and the rinse phase to feed wash or rinse water to the spray nozzles 23.
  • the flow regulator 70 is arranged along the conduit extending between the circulation pump 21 and the spray nozzles 23 of the wash water circulation system 20.
  • the flow regulator 50 comprises a valve device 71 arranged to switch the arrangement between said first and second configuration. In the first configuration the connection of the rinse water tank 41 to the conduit extending to the spray nozzles 23 is closed while the conduit from the circulation pump 21 to the spray nozzles 23 is open, and in the second configuration the connection of the rinse water tank 41 to the conduit extending to the spray nozzles 23 is open while the conduit extending from the circulation pump 21 to the spray nozzles 23 is closed.
  • the flow regulator 70 furthermore comprises a rinse water pump 72 arranged to feed water from the rinse water tank 41 to the spray nozzles 23. Since the flow regulator 70 is connected to the dish water circulation system between the circulation pump 21 and the spray nozzles 23 the rinse water pump 72 is required to feed water from the rinse water tank 41 to the spray nozzles 23.
  • This second embodiment requires an additional pump but will provide rinse water with even higher grade of purity since the rinse water only will pass through the conduit of the water circulation system extending from the flow regulator 70 to the spray nozzles 23 and not the circulation pump 21 of the water circulation system.
  • the valve device could be embodied as an one way valve arranged in the conduit connecting the rinse water pump with the spray nozzle such that rinse water is allowed to flow from the rinse water pump to the spray nozzles once the rinse water pump is activated, and blocking the conduit when the wash water pump is running to prevent that wash water is flowing towards the rinse water tank once the water circulation pump of the circulation system is running.
  • control unit 60 controls the flow regulator 50 to switch the arrangement according to the invention between the first and second configuration corresponding to the different operational phases of the selected dishwasher program.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)

Abstract

La présente invention concerne un agencement de distribution d'eau pendant une phase de lavage et une phase de rinçage dans une chambre de lavage (11) d'un lave-vaisselle (10), ledit agencement comprenant : un système de circulation (20) comprenant une pompe de circulation (21), un puisard (22), des buses de pulvérisation (23), et un régulateur d'écoulement (50 ; 70) et au moins un réservoir d'eau de rinçage (41) disposé à l'intérieur du lave-vaisselle et comprenant une entrée d'eau fraîche (46) ; le réservoir d'eau de rinçage (41) étant relié au système de circulation (20) par l'intermédiaire du régulateur d'écoulement (50 ; 70) disposé en aval du puisard (22) entre le puisard et les buses de pulvérisation (24) ; et ledit agencement pouvant être modifié par le régulateur d'écoulement entre une première configuration et une seconde configuration, dans la première configuration, ladite pompe de circulation (21) est conçue pour faire circuler de l'eau collectée dans le puisard (22) jusqu'aux buses de pulvérisation (23) conçues pour distribuer de l'eau sur les articles disposés dans la chambre de lavage ; et dans la seconde configuration de l'eau de rinçage provenant dudit réservoir d'eau de rinçage est alimentée aux buses de pulvérisation. L'invention concerne en outre un procédé de fonctionnement du agencement défini ci-dessus.
PCT/EP2014/069104 2014-09-08 2014-09-08 Agencement de distribution d'eau de vaisselle et d'eau de rinçage Ceased WO2016037638A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/069104 WO2016037638A1 (fr) 2014-09-08 2014-09-08 Agencement de distribution d'eau de vaisselle et d'eau de rinçage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/069104 WO2016037638A1 (fr) 2014-09-08 2014-09-08 Agencement de distribution d'eau de vaisselle et d'eau de rinçage

Publications (1)

Publication Number Publication Date
WO2016037638A1 true WO2016037638A1 (fr) 2016-03-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/069104 Ceased WO2016037638A1 (fr) 2014-09-08 2014-09-08 Agencement de distribution d'eau de vaisselle et d'eau de rinçage

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531095A1 (de) * 1985-08-30 1987-03-12 Bosch Siemens Hausgeraete Haushalt-geschirrspuelmaschine
DE3901169A1 (de) * 1989-01-17 1990-07-19 Licentia Gmbh Verfahren und vorrichtung zur rueckgewinnung von waermeenergie
DE29915788U1 (de) * 1999-09-08 1999-12-23 Kulbach, Egon, 65549 Limburg Energie-Spülmaschine
WO2006053634A1 (fr) * 2004-11-19 2006-05-26 Meiko Maschinenbau Gmbh & Co. Kg Procede pour evaluer et garantir un effet hygienique thermique
WO2013143619A1 (fr) * 2012-03-30 2013-10-03 Electrolux Home Products Corporation N.V. Lave-vaisselle et procédé de fonctionnement d'un lave-vaisselle
EP2764814A1 (fr) * 2013-02-08 2014-08-13 AWECO Appliance Entwicklungs- und Engineering GmbH Appareil ménager

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531095A1 (de) * 1985-08-30 1987-03-12 Bosch Siemens Hausgeraete Haushalt-geschirrspuelmaschine
DE3901169A1 (de) * 1989-01-17 1990-07-19 Licentia Gmbh Verfahren und vorrichtung zur rueckgewinnung von waermeenergie
DE29915788U1 (de) * 1999-09-08 1999-12-23 Kulbach, Egon, 65549 Limburg Energie-Spülmaschine
WO2006053634A1 (fr) * 2004-11-19 2006-05-26 Meiko Maschinenbau Gmbh & Co. Kg Procede pour evaluer et garantir un effet hygienique thermique
WO2013143619A1 (fr) * 2012-03-30 2013-10-03 Electrolux Home Products Corporation N.V. Lave-vaisselle et procédé de fonctionnement d'un lave-vaisselle
EP2764814A1 (fr) * 2013-02-08 2014-08-13 AWECO Appliance Entwicklungs- und Engineering GmbH Appareil ménager

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