EP2315546B1 - Lave-vaisselle présentant deux circuits de circulation - Google Patents

Lave-vaisselle présentant deux circuits de circulation Download PDF

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Publication number
EP2315546B1
EP2315546B1 EP09741209.2A EP09741209A EP2315546B1 EP 2315546 B1 EP2315546 B1 EP 2315546B1 EP 09741209 A EP09741209 A EP 09741209A EP 2315546 B1 EP2315546 B1 EP 2315546B1
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EP
European Patent Office
Prior art keywords
washing
dishwasher according
circulation
during
washing liquid
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
EP09741209.2A
Other languages
German (de)
English (en)
Other versions
EP2315546A1 (fr
Inventor
Michael Fauth
Bernd Heisele
Roland Rieger
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102008040653A external-priority patent/DE102008040653A1/de
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to EP09741209.2A priority Critical patent/EP2315546B1/fr
Priority to PL09741209T priority patent/PL2315546T3/pl
Publication of EP2315546A1 publication Critical patent/EP2315546A1/fr
Application granted granted Critical
Publication of EP2315546B1 publication Critical patent/EP2315546B1/fr
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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
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • 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
    • A47L15/4291—Recovery arrangements, e.g. for the recovery of energy or water
    • 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
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/02—Pressurised cleaning liquid delivered by a pump

Definitions

  • the present invention relates to a dishwasher with a rinsing container for receiving items to be washed and with a first circulating circuit for applying items in the washing container with a rinsing liquid, wherein the first circulating a circulating pump for circulating the rinsing liquid, a water heater for heating the circulating rinsing liquid and a Spraying device for spraying the items to be washed with the circulating rinsing liquid, wherein in the first circulation circuit, the rinsing liquid is passed from the rinsing container to the circulation pump and returned to the rinsing container via the spraying device.
  • a dishwasher with such a circulation circuit is known.
  • the items to be washed are subjected to rinsing liquid in a rinsing container by removing rinsing liquid collecting in a collecting pot of the rinsing container by means of a circulating pump and pumping them back into the rinsing container via a spraying device.
  • a required heating of the rinsing liquid takes place simultaneously with the loading of the items to be washed by a water heater arranged in the circulation circuit.
  • a disadvantage of the known dishwasher is that heating of a rinsing liquid causes heating of the rinsing container and / or the items to be washed therein. If, therefore, the rinsing liquid to be heated is not intended for direct loading of items to be washed, this leads to unnecessary energy consumption and consequently to a low efficiency of the dishwasher.
  • the object of the present invention is to provide a dishwasher in which the efficiency is improved.
  • the object is achieved in a dishwasher of the type mentioned in that in the first circulation on an output side of the a branch point is provided, the flow control means are assigned, which make it possible to circulate the rinsing liquid either in the first circulation circuit and / or in a second circulation circuit, wherein the second circulation circuit, the circulation pump of the first circulation, the water heater of the first circulation circuit and in addition a fleet storage wherein, in the second recirculation circuit, the rinsing liquid is conducted from the rinsing container to the circulating pump, pumped via an inlet opening into the float storage or storage container and returned to the rinsing container via an outlet opening of the float storage.
  • flow control means are understood in particular those means which can influence the flow of a rinsing liquid.
  • electrically actuatable flow control means are provided, which allow an automatic control of the flow of rinsing liquid by a control device of the dishwasher in a simple manner.
  • a rinsing liquid also called rinsing liquor
  • a rinsing liquid preferably means a liquid which is intended to be applied to the items to be washed in order to clean and / or treat them in another way.
  • the rinsing liquid can also be provided for heating the items to be washed, which is customary, for example, during a rinsing step.
  • a rinsing fluid is usually a predominant part of water.
  • the rinsing liquid can be enriched with cleaning agents, with cleaning aids, such as, for example, rinse aid and / or with dirt which has been removed from the items to be washed.
  • the flow control means are expediently designed so that in a first operating state, the rinsing liquid can circulate at least substantially in the first circulation circuit. In this way, a conventional treatment of items to be washed, such as dishes, possible. Furthermore, they are in particular designed so that in a second operating state, the rinsing liquid at least substantially circulate in the second circulation circuit. However, if necessary, further operating states may be provided in which no circulation or circulation in both recirculation circuits is possible.
  • the rinsing container, its possible insulation, optionally located in the Spül organizations of the dishwasher are heated less than is the case with the conventional heating a rinsing liquid , In this way, a rinsing liquid can be heated with a lower energy input. In addition, less water vapor is generated in the washing, which further reduces energy losses.
  • the outlet opening of the fleet storage be connected to the washing so that the circulated in the second circulation rinse liquid travels in the washing container until reaching the collecting pot a shorter path than that in a circulated in the first recirculation and thus introduced via the spray system in the washing rinsing the case is.
  • the heat emission of the rinsing liquid in the washing container continues to decrease.
  • the exit opening of the float storage tank can correspond with an inlet opening of the washing compartment in such a way that in that the rinsing fluid leaving the float storage tank through the outlet opening enters the rinsing tank directly, that is to say without elaborate connecting lines, through the inlet opening.
  • the proposed dishwasher advantageously allows the heating of rinsing liquid both in the first circulating circuit and in the second circulating circuit with only one, i. single water heater.
  • the water heater can be arranged for example in the washing, in the collecting pot, between the collecting pot and the circulating pump or between the circulation pump and the branching point.
  • the circulating pump can be connected on the input side to a collection pot arranged on the washing container for collecting flushing liquid and preferably arranged in or on the collecting pot, which is why it is also referred to as a pump pot.
  • the dishwasher according to the invention is characterized by low energy consumption.
  • the design effort is relatively low, so that it is easy and inexpensive to produce.
  • the dishwashing machine according to the invention can therefore be designed, in particular, as a household dishwasher.
  • the rinsing liquid in the second circulating circuit is returned to the rinsing container, preferably by overfilling, in such a way that it flows downwards along a partial height or along an overall height of an inner side of a wall, in particular a side wall of the rinsing container.
  • the rinsing fluid circulated in the second circulation circuit does not come in contact or only slightly with dishes placed in dish racks. This is true even if the rinse liquid for design reasons in an upper region of the washing container is introduced into this. In this way, a heat transfer of the washing liquid is avoided to the items to be washed, so that the efficiency of the dishwasher continues to increase.
  • the rinsing liquid can be introduced in a middle region of the rinsing container and particularly preferably in a lower region of the rinsing container.
  • the outlet opening is connected via a return line for returning the rinsing liquid to the rinsing container.
  • a return line makes it possible, irrespective of the arrangement of the fleet storage, to introduce the rinsing liquid into the rinsing container so that it emits little heat there.
  • the return line can run inside and / or outside the washing container.
  • the return line opens in a lower portion of the washing container in the washing.
  • a downstream end portion of the return line may extend within the washing container, wherein the mouth of the return line may be provided in particular in the vicinity of the collecting pot or directly on the collecting pot.
  • a downstream end portion of the return line may extend outside of the washing container, wherein the mouth of the return line may be connected to an inlet opening of the washing container, which may be provided in particular in the vicinity of the collecting pot or directly on the collecting pot.
  • the outlet opening is designed as an overflow opening.
  • a uniform rinsing liquid level in the float storage tank is ensured without complex control means in the region of the outlet opening.
  • About the overflow opening leaves per unit time exactly that amount of washing liquid the fleet storage, which is supplied to the fleet storage via the inlet opening.
  • a favorable for the heating circulation speed for example, in the order of 20 to 30 l / min, can be adjusted in a simple manner by controlling the speed of the circulating pump. This results in a uniform recirculation flow, so that the located outside of the fleet storage amount of rinsing fluid can be kept low, which is energy efficient, without this there is a risk of dry running of the water heater, which could damage them.
  • the inlet opening and the outlet opening are arranged at opposite end areas of the float tank.
  • flow guidance elements are provided in the fleet memory. As a result, the formation of flow-dead or flow-reduced zones in the fleet storage can be further reduced.
  • the inlet opening is arranged at a lower end of the fleet storage. This makes it possible to empty the fleet storage with the aid of the weight of the rinsing liquid through the inlet opening. As a result, it is possible in a simple manner to guide rinsing liquid stored in the float storage tank back into the first circulation circulation, if, for example, the items to be washed are to be treated by means of the rinsing liquid.
  • the flow control means comprise a water diverter which has at least one controllable outlet which is connected to at least one spray element of the spraying device and which has a further outlet which is connected to a connection line leading to the liquor storage tank.
  • a water diverter is present in virtually all modern dishwashers and serves in particular To distribute from the circulation pump supplied rinsing liquid to different spray elements of the spray system of the dishwasher.
  • the spray system may include an upper rotatable spray arm, a lower rotatable spray arm, and a fixed overhead shower, each of which may be connected to an outlet of the water switch.
  • the water diverter may have various operating states in which individual ones of these outputs, several of these outputs or all of these outputs are optionally open or closed. The control of the water switch takes place automatically.
  • the branch point can be integrated into the water switch, so that the design of the dishwasher is simple.
  • the water switch can be designed so that all provided for the spray system outputs can be closed simultaneously. In this way, it is possible without much effort to interrupt the first recirculation cycle when the rinsing liquid is to be performed on the second recirculation cycle, about to heat the rinsing liquid, without wanting to treat the items to be washed simultaneously.
  • the output for the connection line can be designed so that it is controllable or that it is always open.
  • the flow control means comprise in particular a check valve, which is arranged in the connection line.
  • a check valve is preferably understood to mean valves which, unlike conventional water switches, which can only block in a flow direction, can interrupt a flow of liquid in both directions of flow.
  • the water heater is designed as a water heater.
  • a water heater preferably comprises a water-conducting element, for example a pipe, on or in which at least one heating element is arranged.
  • a continuous heating is characterized by a low Size, by a good efficiency and by a uniform heating of the circulating rinsing liquid.
  • the water heater can be conveniently integrated into the circulation pump.
  • an openly arranged heating element for example a heating element arranged in the washing container or in the collecting pot, could also be provided.
  • water heaters are more efficient, are more resistant to damage and can, especially at higher flow rates, deliver a higher amount of heat per unit time to the rinsing liquid.
  • insulation means for the fleet storage preferably a thermal all-round insulation, are provided, which counteract a transfer of heat located in the interior of the fleet storage to the outside.
  • Such insulating agents counteract a cooling of the rinsing liquid in the fleet storage.
  • the efficiency of the dishwasher can be increased, in particular if the rinsing liquid is circulated for a longer period of time in the second circulation circuit or stored temporarily in the float storage tank after the circulation.
  • a control device in which at least one wash program for controlling a wash cycle for washing items to be washed in the wash tank and at least one preheating program for controlling a preheat cycle for preheating wash liquid for a wash cycle are each separately accessible, the preheat cycle a Includes heating phase, during which a circulation and heating of rinsing liquid takes place in the second circulation circuit.
  • the control device is provided here for the automatic control of operating sequences of the dishwasher.
  • it can preferably be designed as so-called sequence control, in particular as electronic sequence control.
  • At least one wash program for controlling a wash cycle for washing items to be washed, in particular for washing dishes, is stored in the control device.
  • several washing programs are provided, each of which one can be selected and started by the operator. This makes it possible to adjust the sequence of a rinse cycle in particular to the load, to the type of loading, to the degree of soiling of the items to be washed and / or to the desired duration of the rinse cycle.
  • the respective stored washing programs may expediently each comprise at least one pre-rinsing step for pre-cleaning items, at least one cleaning step for thoroughly cleaning items, at least one intermediate rinse for removing dirty rinse liquid from the items to be washed, at least one rinse step for avoiding stains on items to be washed and / or for preparing a Drying step and / or at least one drying step for drying the dishes.
  • At least one preheating program for controlling a preheating cycle for preheating rinsing liquid for a rinse cycle is advantageously stored in the control device.
  • preferably several preheating programs can be provided, in which, for example, rinsing liquid is preheated to different temperatures.
  • the preheated rinse liquor may be stored in the fleet storage after completion of the preheat cycle in the dishwasher until the start of a rinse, provided for a given wait time to start a rinse of a selected dishwashing program, and used in the rinse cycle to treat the washware Heating times during the wash cycle can be shortened or hidden.
  • the pre-rinse cycle of the rinse cycle can be omitted.
  • Preheating and washing program can be started independently by an operator of the dishwasher in an advantageous manner.
  • the operator has the opportunity to start the preheat program first and to initiate a rinse program at any later time after completion of the preheat program.
  • the dishwasher is preferably in a wait mode. It is more advantageous Way possible that the items to be washed is invited after the completion of the preheat program in the washing of the dishwasher.
  • the washing container and its one or more dish racks are particularly largely dry, which is comfortable for the user. In conjunction with the shortening of the duration of the wash program due to the lower heating times so can the time can be shortened, in which the ware is not available for its intended use.
  • the dishwasher is at least partially loaded before the preheating program.
  • Such a combination of preheating program and waiting phase is also referred to as "wait & run functionality".
  • the inventive design of the dishwasher allows a time and / or energy-optimized use of the "Wait & Run functionality”.
  • the dishwasher according to the invention can be provided in particular that during the heating phase, a circulation and heating of rinsing liquid only, ie essentially exclusively in the second recirculation, so that during the heating phase no or only a small amount of rinsing liquid on the spray system or the spray is directed into the washing.
  • a circulation and heating of rinsing liquid only ie essentially exclusively in the second recirculation, so that during the heating phase no or only a small amount of rinsing liquid on the spray system or the spray is directed into the washing.
  • the rinsing liquid for a desired amount of rinsing water were returned to its preheating by means of the spraying system in the rinsing container, it would be distributed over a wide range of the rinsing container.
  • the liquid sprayed by means of the spray system of the first circulation circuit would also be cleaned on the one or more dish racks arranged in the rinsing container and / or on them Distribute ware. This would mean that the rinsing liquid would come into large-scale thermal contact with the rinsing container. This would dissipate heat to the outside via the washing.
  • At least a substantial part of the rinsing liquid heated during the heating phase is stored in the float memory after the preheating cycle, preferably at least until the start of the rinsing cycle.
  • both heat losses due to heat conduction and heat losses due to evaporation of rinsing liquid can be further reduced.
  • the preheated rinsing liquid were stored in the rinsing container, it would be distributed in a lower region of the rinsing container, with the result that it would come into large-area thermal contact with the bottom and / or a collecting pot of the rinsing container. This would dissipate heat to the outside via the floor or via the collecting pot.
  • a significant part of the washing liquid could evaporate in the washing container, so that the remaining washing liquid would be further cooled.
  • the temperature of the stored rinsing liquid can be advantageously higher at the beginning of the rinsing program, an intensive thermal effect is achieved with the rinsing liquid already at the beginning of the treatment of the rinsing product, which manifests itself, for example, during a cleaning cycle of the rinse cycle by a higher cleaning performance, which in turn can allow a shortening of the cleaning cycle with comparable cleaning effect.
  • the rinsing liquid already at the beginning of the treatment of the rinsing product, which manifests itself, for example, during a cleaning cycle of the rinse cycle by a higher cleaning performance, which in turn can allow a shortening of the cleaning cycle with comparable cleaning effect.
  • the duration of the rinse cycle can be further shortened overall.
  • a temperature measuring sequence downstream of the preheating cycle for measuring the temperature of the rinsing liquid heated during the preheating cycle can be provided by means of a temperature sensor.
  • a cooling of the rinsing liquid can be detected between the preheat cycle and the beginning of the rinse cycle.
  • the rinsing liquid can be circulated during the measurement in the second circulating circuit, so that the temperature sensor can be arranged at any point in the second circulating circuit. moreover This results in a thorough mixing of the rinsing liquid, so that a meaningful average temperature can be detected.
  • a post-heating sequence may be provided in which the rinsing liquid is preferably circulated and heated in the second circulation circuit. In this way it can be ensured that at the beginning of the rinse the rinse liquid has the intended temperature.
  • a first partial wash cycle of the wash cycle which is preferably started after the preheat cycle and optionally then selected, is a cleaning cycle in which heated and subsequently stored wash liquid is used during the preheat cycle.
  • the preheating cycle may include a cleaning phase upstream of the heating phase for cleaning a bottom region of the washing container, in which first circulation of washing liquid takes place via the first circulation circuit and then pumping out of the circulated washing liquid by means of a drain pump.
  • a cleaning phase upstream of the heating phase for cleaning a bottom region of the washing container, in which first circulation of washing liquid takes place via the first circulation circuit and then pumping out of the circulated washing liquid by means of a drain pump.
  • the spraying device can have a plurality of individually connectable via a water diverter with the circulation pump spray elements, wherein the water diverter is controlled so that during the circulation in the cleaning phase rinsing liquid substantially via a arranged in a lower region of the washing container spray element in the Collection pot is returned.
  • Spraying machines modern dishwashers usually have several individually connectable to the circulation pump Spray elements, wherein the spray elements may be fixed or movable.
  • a water diverter is usually provided, which is controllable by the control device such that the spray elements are charged individually, in groups or in total with rinsing liquid.
  • the water switch is suitably controlled so that during the cleaning phase rinsing liquid is introduced substantially via a arranged in a lower region of the washing container spray element or via a plurality of arranged in a lower region of the washing chamber spray elements in the washing, so contact the rinsing liquid during the cleaning phase can be reduced with possibly already loaded items. In this way it can be prevented that dirt adhering to the items to be washed is loosened and deposited in the bottom area of the washing container, which would be counterproductive during the cleaning of the floor area.
  • the speed of the circulation pump is particularly controlled so that it is less than its rated speed during circulation in the cleaning phase of the preheat cycle. In this way results during the cleaning phase, a lower circulation rate than for example during a cleaning cycle of a rinse cycle. In particular, this causes the rinsing liquid to emerge from the spraying elements of the spraying device at a lower speed. In this way, the rinsing liquid sprayed into the rinsing chamber is less distributed in the rinsing container, so that the risk of detachment of dirt adhering to the items to be washed, which is unwanted in the cleaning phase of the preheating cycle, is further reduced.
  • the rotational speed of the circulating pump is controlled in particular so that during the circulation in the cleaning phase from a arranged below a crockery spray element rinse liquid the crockery basket and / or the ware contained therein substantially not reached.
  • the dish rack and / or the items that may be contained therein are only insignificantly or not at all acted upon by dishwashing liquid, which may escape from a spraying element arranged below the dish rack can. This may be the case, for example, if the water switch does not completely close the outlet to the respective, in particular lower, spray element of the spray system and some leakage fluid is pumped into the respective spray element.
  • Modern dishwashers usually have one or more baskets for placing items to be washed.
  • a rotatably mounted spray arm is arranged in many cases among the existing dish racks, which has at its upper side outlet nozzles for rinsing liquid.
  • the circulating pump works at least at times with such a high speed that the speed of the rinsing liquid leaving the nozzles is so high that the rinsing liquid reaches the items to be washed in the rack, for example for the purpose of cleaning.
  • turbulence of the rinsing liquid in the rinsing container can be reduced, which leads to a lower heat emission of the rinsing liquid.
  • rinsing liquid introduced at least partially into the float tank during a preceding rinse cycle is used.
  • the water consumption of the dishwasher can be lowered.
  • the flushing liquid stored in the float storage tank generally has at least room temperature and thus a higher temperature than raw water from a building-side water supply. This reduces the energy required to heat the rinsing liquid during the preheating cycle.
  • an output of a message is provided after the end of the preheat cycle, which signals the end of the preheat cycle to the user. This will enable the operator to use the wash program as soon as possible.
  • the notification takes place via an operator interface, which comprises acoustic and / or visual output means.
  • Acoustic output means may comprise lamps, light-emitting diodes, alpha-numeric and / or graphic output means.
  • Optical output means may include, for example, buzzer and / or speakers.
  • the invention relates to a method for operating a dishwasher, in particular a dishwasher according to the invention, in which a rinse for rinsing items in a rinsing container and a preheat cycle for preheating rinse liquid for the rinse is performed, wherein the preheat cycle comprises a heating phase during the rinsing liquid circulated and heated.
  • the rinsing liquid is conducted out of the rinsing container during the heating phase, pumped via an inlet opening into a float store and returned to the rinsing container via an outlet opening of the float store.
  • the inventive method enables efficient operation of a dishwasher, in particular a dishwasher according to the invention. Further developments of the method according to the invention are explained in the description of the claimed dishwasher.
  • FIGS. 1 to 4 only those components of a dishwasher are provided with reference numerals and explained which are necessary for the understanding of the invention. It goes without saying that the dishwasher according to the invention can comprise further parts and assemblies.
  • FIG. 1 is schematically shown an advantageous embodiment of a dishwasher according to the invention with a washing compartment delimiting a washing compartment 1.
  • a washing compartment of the washing container 1 a not shown, to be cleaned dishes in dish racks 3, 5 are arranged.
  • two spraying arms 7, 8 provided in different spraying levels are arranged by way of example, via which the items to be washed are supplied with washing liquid.
  • a pump pot 11 is provided with a roughly indicated sieve assembly 10. From the sump 11, a recirculation line 9 is guided away with circulating pump 13 arranged therein.
  • the circulation line 9 is fluidly connected via supply lines 14, 15 with the spray arms 7, 8. In this case, the circulation line 9 is connected to an input of a water distributor 25.
  • Each of the supply lines 14, 15 is connected to an individually controllable output of the water distributor 25, wherein it is at least possible to control the water distributor 25 so that either one of the spray arms 7, 8 with rinsing liquid can be supplied.
  • To a further output of the water distributor 25 is connected to the hopper 19 leading connecting line 23 is connected.
  • a check valve 26 is also arranged, which is opened during the filling and emptying of the hopper 19 via the inlet opening 28. During the storage of rinsing liquid in the float memory 19, however, it is closed.
  • the circulating pump 13 is connected downstream of a designated as heating element 12 water heater 12, such as a water heater 12th
  • the sump 11 is also coupled via connecting pieces with a fresh water supply line 16 coupled to the water supply network, in which an inlet valve 33 is arranged. Likewise, the sump 11 is connected to a drain line 17 in connection, in which a drain pump 18 for pumping out rinsing liquid from the washing compartment 1 is arranged.
  • the washing compartment 1 has at its in the FIG. 1 right side as a storage tank 19 a so-called fleet storage 19 as a fleet storage, which may be thermally coupled in the manner of a heat exchanger in contact with a side wall 20 of the washing compartment 1. Rinsing fluid which is no longer needed after execution of a partial program step of a rinse cycle or a rinse cycle can be temporarily stored in the float memory 19.
  • the fleet storage 19 is in terms of flow in connection with the washing compartment in its upper region via a ventilation opening 22.
  • a control device 27 of the dishwasher is used for the automatic control of operating sequences according to predetermined and by an operator via the control interface 29 selectable and activatable programs.
  • the operator interface 29 is used in addition to the input of operating commands and the output of messages for operator guidance. For example, the completion of a program can be reported.
  • a plurality of wash programs for controlling a wash cycle and one or more preheating programs for controlling a preheat cycle for preparing a preheated wash liquid for a wash cycle may be provided in the control device.
  • the control device 27 is in particular for controlling the inlet valve 33, the drain pump 18, the circulation pump 13, the heating element 12, the Water switch 25 and the check valve 26 formed and connected to the elements to be controlled via control lines. Furthermore, the control device 27 is connected to the user interface 29 for preferably bidirectional data exchange and to a temperature sensor 32, which is arranged, for example, in the sump 11 for detecting the temperature of rinsing liquid for recording temperature readings.
  • a first conventional circulation circuit I of the dishwasher for performing later described subprogram steps of the rinse include the sump 11 with associated sieve assembly 10, the recirculation line 9, the circulation pump 13, the heating element 12, the water diverter 25, the leads 14, 15 and the spray 7, 8 present or integrated.
  • the fleet memory 19 is not integrated in the first hydraulic circuit I. Rather, a branch point 21 is provided downstream of the heating element 12 in the circulation line 9, at which a connecting line 23 branches off, which is connected to an input port 28 of the float tank 19.
  • a branching point 21 designed as a three-way switching valve 25 Wasserweiche 25 is provided.
  • the water diverter 25 is controlled such that at least one of the supply lines 14, 15 is supplied with rinsing liquid by the circulating pump 13. In this switching position of the three-way switching valve 25, therefore, the rinsing liquid in the first circulation circuit I of the dishwasher can be circulated. It is in the in FIG. 1 illustrated situation, the check valve 26 is closed, so that the connection to the fleet memory 19 is interrupted.
  • the check valve 26 is opened, so that the rinsing liquid in the second circulation circuit II can be pumped via the input port 28 into the hopper 19, wherein the hopper 19 is first filled up to the outlet opening 22 formed as an overflow 22 and then the rinsing liquid through the ventilation opening 22 is introduced into the washing compartment 1.
  • the fleet memory 19 is overfilled such that liquid exits through an overflow opening and / or overflow opening and a closed, continuous liquid circulation circuit between the circulation pump and the fleet memory is formed.
  • the rinsing liquid is guided in the rinsing tank 1 through a return line 30, which is located in the interior of the washing compartment 1.
  • the mouth of the return line 30 is arranged in a lower region of the washing container 1.
  • the three-way switching valve 25 interrupts in a in the FIG. 2 Depending on the switching position of the three-way switching valve 25 and the check valve 26 so the rinsing liquid either mainly, in particular only, in the first recirculation I ( FIG. 1 ) or mainly, in particular only, in the second recirculation cycle II ( FIG. 2 ) are circulated.
  • FIG. 3 shows a second embodiment of a dishwasher according to the invention, wherein the second circulation circuit II is illustrated.
  • the first circulation circuit I of the second embodiment of the dishwasher according to the invention corresponds to the in FIG. 1 illustrated circulating circuit I of the first embodiment of the dishwasher according to the invention, so that can be dispensed with a separate presentation.
  • the return line 30 runs outside the washing container 1. It extends from the outlet opening 22 of the hopper 19 designed as an overflow 22 to an inlet opening 34 of the washing container 1.
  • the return line 30 is integrated in the hopper 19. Here, it runs in the interior of the fleet storage unit 19. This design increases the usable internal volume of the washing compartment 1 in comparison to the first exemplary embodiment. At the same time, the space required outside of the washing compartment 1 is not increased.
  • the wash liquor S is pumped into the liquor store 19.
  • the rinse S is passed through the overflow 22 and the return line 30 to the inlet opening 34 of the washing.
  • the inlet opening 34 of the washing container is arranged in a middle height region of the washing container 1.
  • the rinsing liquor S only flows along a partial height of the wall 20 after passing through the inlet opening 34, as a result of which a heat emission of the rinsing liquor S to the wall 20 is reduced.
  • the inlet opening 34 of the washing container could also be arranged in a lower height region of the washing container, so that the heat output of the washing liquor S to the wall 20 could be further reduced.
  • the inlet opening 30 of the washing compartment 1 is arranged in the bottom of the washing compartment, preferably in the immediate vicinity of the collecting cup 11. As a result, a heat transfer to the wall 20 can be completely or almost completely prevented. It would also be possible for this purpose to connect the return line 30 directly with an opening on a side wall or at the bottom of the collecting pot, so that the rinsing fluid circulated in the circulating circuit II comes into contact neither with the wall 20 nor the bottom of the washing container.
  • FIG. 4 shows the timing of an exemplary operation BA of a dishwasher according to the invention, which may be formed according to both the first embodiment and according to the second embodiment, wherein a preheat cycle VHZ and a rinse SG is shown.
  • a curve Z33 shows the operating state of the inlet valve 33
  • a curve Z13 the operating state of the circulation pump 13
  • a curve Z12 the operating state of the water heater 12
  • a curve Z25 the operating state of the water switch 25
  • a curve Z26 the operating state of the check valve 26th
  • a curve Z18 shows the operating state of the drain pump 18.
  • an optional purge phase RP is performed whose purpose is to pre-purify a bottom portion of purge tank 1, to prevent carryover of dirt into the fleet storage 19 during a subsequent heating phase HP.
  • an intended amount of rinsing liquid S is first introduced into the washing compartment 1 of the dishwasher by opening the check valve 26, which is represented by an operating state "1".
  • the inlet valve 33, the circulation pump 13, the heater 12 and the drain pump 18 is turned off, which is in FIG. 4 each referred to as operating state "0".
  • both outputs of the water distributor 25 are closed.
  • This operating state of the water switch is in FIG. 4 also denoted by "0".
  • the check valve 26 is closed, which is in FIG. 4 is shown as operating state "0".
  • the rinsing liquid S is circulated by means of the circulating pump 13, wherein the circulating pump 13 is operated at low speed.
  • This operating state of the circulating pump 13 is in FIG. 4 named as "1".
  • the water switch 25 is controlled so that only the lower spray arm 8 is supplied with rinsing liquid S.
  • This operating state of the water switch 25 is in FIG. 4 represented as "1". Since the check valve 26 remains closed in this phase, the rinsing liquid is circulated exclusively in the first circulation circuit I.
  • the dirt washed off by the flushing liquid S from the bottom area is consequently not transported into the liquor storage tank 19. Since the rinsing liquid S only exits at low speed and only from the lower spray arm 8, the items to be washed is not reached by the rinsing liquid S, so that no further dirt is removed from the dishes.
  • the circulation pump 13 is turned off, the water switch 25 is closed and the drain pump 18 is turned on to pump out the now soiled washing liquid of the cleaning phase RP to the outside.
  • the heating phase HP is performed.
  • first inlet valve 33 is opened, which is represented by an operating state "1" to receive raw water, so as to increase the amount of washing liquid S in the washing compartment 1 of the dishwasher.
  • the rinsing liquid S circulated in the second circulation circuit II by the circulating pump 13 is operated again at low speed and the check valve 26 is opened.
  • the water switch 25 remains in the operating state "0", so that the spray arms 7, 8 no rinsing liquid is supplied.
  • the rinsing liquid S recirculated in the second circulation circuit II is heated by means of the water heater 12.
  • the on state of the water heater 12 is designated by "1".
  • the check valve 26 is closed at the same time.
  • the heating phase HP and the preheating cycle VHZ are completed.
  • the output of a message may be provided which signals the end of preheat cycle VHZ to the user. This will enable the operator to use the now possible rinse SG as soon as possible.
  • the output of the message can be done via the user interface 29, which may include acoustic and / or optical output means for this purpose.
  • a temperature test sequence TP may be provided to detect a drop in the temperature of the rinsing liquid S can.
  • the temperature check sequence TP can be carried out automatically, for example after a predetermined time, possibly several times.
  • the circulation pump 13 is again operated at low speed and the check valve 26 is opened, so that the rinsing liquid is circulated in the first recirculation circuit.
  • the rinsing liquid S is guided along the temperature sensor 32 so that it can absorb a mean temperature of the rinsing liquid S. Since the rinsing liquid S is not passed through the spray system 7, 8, the rinsing liquid cools only slightly during the temperature test sequence TP.
  • a Nachffyphase NP can be performed when the temperature, for example, below a predetermined Limit value has dropped.
  • the dishwasher is operated as in the heating phase HP of the preheat cycle.
  • the dishwasher now remains idle until the operator starts a rinse cycle SG by calling a wash program.
  • the rinse cycle SG comprises a cleaning cycle RG, a rinse cycle KG and a drying cycle TG, ie a pre-rinse cycle is omitted here.
  • the rinse cycle SG could also include further partial rinses, for example a pre-rinse cycle or an intermediate rinse cycle.
  • the check valve 26 is opened in order to allow the preheated rinsing liquid S to enter the rinsing container 1.
  • the curve Z26 symbolizes this operating state by briefly taking the value "1".
  • the circulation pump 13 is turned on and operated at high speed. If necessary, the water heater 12 can be turned on for a short period of time, if the temperature of the washing liquid S should not be sufficient.
  • the water switch 25 is controlled so that alternately the lower spray arm 8 and the upper spray arm 7 is charged with flushing fluid S.
  • the curve Z25 shows this by taking alternately the values "1" and "2".
  • the circulation pump 13 is switched off and the flushing liquid S of the cleaning cycle RG is pumped off with the aid of the drain pump 18 via a waste water connection.
  • the inlet valve 33 is opened again in order to introduce rinsing liquid S into the rinsing container 1.
  • the circulation pump 13 is turned on again and operated at high speed.
  • the water heater 12 is usually turned on again for a certain period of time.
  • the water switch 25 is also controlled during the rinse cycle KG so that the spray arms 7 and 8 are alternately supplied with flushing liquid S.
  • the rinsing liquid S of the rinse cycle KG is pumped by closing the water diverter 25 and by opening the check valve 26 into the liquor store 19. After that the circulation pump 13 is turned off again. If the capacity of the float tank 19 is insufficient, the excess flushing liquid S can be pumped out by means of the drain pump 18.
  • the subsequent drying of the items to be washed in the drying cycle TG takes place, for example, by so-called self-drying, in which the residual water adhering to the items to be washed evaporates and condenses, for example, on the washing container 1, or by a drying unit not described in the context of this application.
  • the invention relates to the heating of a rinsing liquid before cleaning the dishes ("Wait & Run functionality").
  • a first amount of bath is circulated for a rinse over the fleet storage in an external circuit, heated and then cached in the fleet storage to the actual start of the rinse in the warmed up state until the actual program start.
  • the interior of the device is heated less than before, so that can be achieved energy savings.
  • the residual amount of water from the heating process which can not be included because of the limited volume of the fleet storage, is either pumped out of the unit or remains at low water level for further rinse in the unit.
  • the second possibility is usually a lower water and energy consumption. Wicks lying on the floor (eg due to loading errors or if a part falls out of the basket) can still be picked up by hand and do not have to be taken out of the hot water bath (as in solutions without a floats storage).
  • the bottom area can first be coarsely pre-cleaned by draining the water from the fleet storage (stored from the last rinse) and briefly pre-rinsing the interior with a suitable circulating pump speed. After this brief pre-rinsing or internal cleaning, the polluted water is pumped out of the device. Then fresh water is filled into the device and heated in the external circulation circuit.
  • this method can provide a kind of quick program for the customer by shortening the flushing time.
  • By heating the bath via the external hydraulic circuit energy is saved compared to the known interior heating.
  • the invention can thus provide a time- and / or energy-optimized party functionality, ie it can be a quick sweep of a dishwashing program for short-term cleaning of items such as a party or celebration and in other cases in which a quick program is desired to be performed.

Landscapes

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

Claims (26)

  1. Lave-vaisselle avec une cuve de lavage (1) pour l'accueil de vaisselle et avec un premier circuit de circulation (I) pour l'alimentation de la vaisselle se trouvant dans la cuve de lavage (1) en un liquide de lavage (S), dans lequel le premier circuit de circulation (I) présente une pompe de circulation (13) pour la mise en circulation du liquide de lavage (S), un chauffage à eau (12) pour le chauffage du liquide de lavage (S) mis en circulation et un dispositif de pulvérisation (7, 8) pour la pulvérisation de la vaisselle avec le liquide de lavage (S) mis en circulation, dans lequel le liquide de lavage (S) est dirigé hors de la cuve de lavage (1) vers la pompe de circulation (13) et renvoyé via le dispositif de pulvérisation (7, 8) dans la cuve de lavage (1) dans le premier circuit de circulation (I), dans lequel est prévu, sur un côté sortie de la pompe de circulation (13), dans le premier circuit de circulation (I), un point de bifurcation (21) auquel sont affectés des moyens de commande du débit (25, 26) qui permettent de faire circuler le liquide de lavage (S) au choix dans le premier circuit de circulation (I) et/ou dans un deuxième circuit de circulation (II), caractérisé en ce que le deuxième circuit de circulation (II) comprend la pompe de circulation (13) du premier circuit de circulation (I), le chauffage à eau (12) du premier circuit de circulation (I) et en outre un réservoir à eau de lavage (19), dans lequel, dans le deuxième circuit de circulation (II), le liquide de lavage (S) est dirigé hors de la cuve de lavage (1) vers la pompe de circulation (13), pompé via un orifice d'entrée (28) dans le réservoir à eau de lavage (19) et renvoyé via un orifice de sortie (22) du réservoir à eau de lavage (19) dans la cuve de lavage (1).
  2. Lave-vaisselle selon la revendication précédente, caractérisé en ce que dans le deuxième circuit de circulation (II), le liquide de lavage (S) est renvoyé de telle sorte dans la cuve de lavage (1) qu'il s'écoule vers le bas, en particulier qu'il coule le long d'une hauteur partielle ou le long d'une hauteur totale d'un côté intérieur d'une paroi (20), en particulier d'une paroi latérale (20) de la cuve de lavage (1).
  3. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que l'orifice de sortie (22) est relié à la cuve de lavage (1) via une conduite de retour (30) pour le renvoi du liquide de lavage (S).
  4. Lave-vaisselle selon la revendication 3, caractérisé en ce que la conduite de retour (30) débouche dans la cuve de lavage (1) dans une zone inférieure de la cuve de lavage (1).
  5. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que l'orifice de sortie (22) est exécuté sous forme d'orifice de trop-plein (22).
  6. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que l'orifice d'entrée (28) et l'orifice de sortie (22) sont disposés en des zones terminales opposées du réservoir à eau de lavage (19).
  7. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que des éléments de guidage de l'écoulement sont prévus dans le réservoir à eau de lavage (19).
  8. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que l'orifice d'entrée (28) est disposé en une extrémité inférieure du réservoir à eau de lavage (19).
  9. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que les moyens de commande du débit (25, 26) comprennent un dispositif d'aiguillage de l'eau (25), lequel présente au moins une sortie commandable reliée à au moins un élément de pulvérisation (7, 8) du dispositif de pulvérisation (7, 8) et qui présente une sortie supplémentaire reliée à une conduite de raccordement (23) menant vers le réservoir à eau de lavage (19).
  10. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que les moyens de commande du débit (25, 26) comprennent une soupape d'arrêt (26) disposée dans la conduite de raccordement (23).
  11. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que le chauffage à eau (12) est exécuté sous forme de chauffe-eau (12).
  12. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce que des isolants (31) sont prévus, lesquels contrent une transmission de la chaleur se trouvant à l'intérieur du réservoir à eau de lavage (19) vers l'extérieur.
  13. Lave-vaisselle selon l'une des revendications précédentes, caractérisé en ce qu'un dispositif de commande (27) est prévu, dans lequel au moins un programme de lavage pour le pilotage d'un cycle de lavage (SG) pour le lavage de vaisselle dans la cuve de lavage (1) et au moins un programme de préchauffage pour le pilotage d'un cycle de préchauffage (VHZ) pour le préchauffage de liquide de lavage (S) pour un cycle de lavage (SG) sont respectivement appelables indépendamment l'un de l'autre, dans lequel le cycle de préchauffage (VHZ) comprend une phase de chauffage (HP) durant laquelle une circulation et un chauffage du liquide de lavage (S) s'effectuent dans le deuxième circuit de circulation (II).
  14. Lave-vaisselle selon la revendication 13, caractérisé en ce qu'au moins une partie essentielle du liquide de lavage (S) chauffé pendant la phase de chauffage (HP) est stockée dans le réservoir à eau de lavage (19) durant le cycle de préchauffage (VHZ), de préférence au moins jusqu'au début du cycle de lavage (SG).
  15. Lave-vaisselle selon l'une des revendications 13 ou 14, caractérisé en ce qu'une séquence de mesure de la température (TP) ultérieure au cycle de préchauffage (VHZ) est prévue afin de mesurer au moyen d'un capteur de température (32) la température du liquide de lavage (S) chauffé durant le cycle de préchauffage (VHZ).
  16. Lave-vaisselle selon la revendication 15, caractérisé en ce qu'en fonction de la température mesurée pendant la séquence de mesure de la température (TP), une séquence de chauffage ultérieur (NP) est prévue, durant laquelle le liquide de lavage (S) est mis en circulation et chauffé de préférence dans le deuxième circuit de circulation.
  17. Lave-vaisselle selon l'une des revendications 13 à 16, caractérisé en ce qu'un premier cycle de lavage partiel du cycle de lavage (SG) est un cycle de lavage (RG) durant lequel le liquide de lavage (S) chauffé durant le cycle de préchauffage (VHZ) et ensuite stocké est utilisé.
  18. Lave-vaisselle selon l'une des revendications 13 à 17, caractérisé en ce que le cycle de préchauffage (VHZ) comprend une phase de lavage (RP) antérieure à sa phase de chauffage (HP) pour le lavage d'une zone de fond de la cuve de lavage (1), dans laquelle une mise en circulation du liquide de lavage (S) via le premier circuit de circulation (I) et ensuite un pompage au moyen d'une pompe à lessive (18) du liquide de lavage (S) mis en circulation s'effectuent.
  19. Lave-vaisselle selon la revendication 18, caractérisé en ce que le dispositif de pulvérisation (7, 8) présente plusieurs éléments de pulvérisation (7, 8) reliables individuellement via un dispositif d'aiguillage de l'eau (25) avec la pompe de circulation (13), dans lequel le dispositif d'aiguillage de l'eau (25) est piloté de telle sorte que pendant la mise en circulation durant la phase de lavage (RP) du cycle de préchauffage (VHZ), du liquide de lavage (S) est renvoyé dans le bac collecteur (11) essentiellement via un élément de pulvérisation (8) disposé dans une zone inférieure de la cuve de lavage (1).
  20. Lave-vaisselle selon la revendication 18 ou 19, caractérisé en ce qu'une vitesse de rotation de la pompe de circulation (13) est pilotée de telle sorte qu'elle est inférieure à sa vitesse de rotation nominale durant la mise en circulation pendant la phase de lavage (RP) du cycle de préchauffage (VHZ).
  21. Lave-vaisselle selon l'une des revendications 18 à 20, caractérisé en ce que la vitesse de rotation de la pompe de circulation (13) est pilotée de telle sorte que durant la mise en circulation pendant la phase de lavage (RP) du cycle de préchauffage (VHZ), le liquide de lavage (S) émanant d'un élément de pulvérisation (8) disposé sous un panier à vaisselle (5) n'atteint essentiellement pas le panier à vaisselle (5) et/ou la vaisselle qu'il contient.
  22. Lave-vaisselle selon l'une des revendications 13 à 21, caractérisé en ce que durant une mise en circulation du liquide de lavage (S) dans le deuxième circuit de circulation (II), en particulier durant la phase de chauffage (HP) du cycle de préchauffage (VHZ), une vitesse de rotation de la pompe de circulation (13) est inférieure à celle durant la mise en circulation dans le premier circuit de circulation (I), en particulier à celle durant un cycle de lavage partiel à circulation d'eau (RG, KG) du cycle de lavage (SG).
  23. Lave-vaisselle selon l'une des revendications 13 à 22, caractérisé en ce que le liquide de lavage (S) engrangé dans le réservoir à eau de lavage (19) est utilisé durant le cycle de préchauffage (VHZ) et au moins partiellement durant un cycle de lavage (SG) antérieur.
  24. Lave-vaisselle selon l'une des revendications 13 à 23, caractérisé en ce que l'émission d'un message signalant à l'utilisateur la fin du cycle de préchauffage (VHZ) est prévue après la fin du cycle de préchauffage (VHZ).
  25. Lave-vaisselle selon la revendication 24, caractérisé en ce que le message s'opère via une interface d'utilisation (29), laquelle comprend des moyens d'émission acoustiques et/ou optiques.
  26. Procédé d'exploitation d'un lave-vaisselle selon l'une des revendications précédentes, dans lequel un cycle de lavage (SG) pour le lavage de vaisselle dans une cuve de lavage (1) est un cycle de préchauffage (VHZ) pour le préchauffage du liquide de lavage (S) pour le cycle de lavage (SG) sont exécutés, dans lequel le cycle de préchauffage (VHZ) comprend une phase de chauffage (HP) durant laquelle le liquide de lavage (S) est mis en circulation et chauffé, caractérisé en ce que le liquide de lavage (S) est dirigé hors de la cuve de lavage (1) durant la phase de chauffage (HP), pompé via un orifice d'entrée (28) dans un réservoir à eau de lavage (19) et renvoyé via un orifice de sortie (22) du réservoir à eau de lavage (19) dans la cuve de lavage (1).
EP09741209.2A 2008-07-23 2009-07-23 Lave-vaisselle présentant deux circuits de circulation Active EP2315546B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09741209.2A EP2315546B1 (fr) 2008-07-23 2009-07-23 Lave-vaisselle présentant deux circuits de circulation
PL09741209T PL2315546T3 (pl) 2008-07-23 2009-07-23 Zmywarka do naczyń z dwoma obiegami cyrkulacyjnymi

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102008040653A DE102008040653A1 (de) 2008-07-23 2008-07-23 Wasserführendes Haushaltsgerät, insbesondere Geschirrspül- oder Waschmaschine
PCT/EP2009/059018 WO2010010012A1 (fr) 2008-07-23 2009-07-15 Appareil électroménager à circulation d'eau, notamment lave-vaisselle ou lave-linge
PCT/EP2009/005369 WO2010009890A1 (fr) 2008-07-23 2009-07-23 Lave-vaisselle présentant deux circuits de circulation
EP09741209.2A EP2315546B1 (fr) 2008-07-23 2009-07-23 Lave-vaisselle présentant deux circuits de circulation

Publications (2)

Publication Number Publication Date
EP2315546A1 EP2315546A1 (fr) 2011-05-04
EP2315546B1 true EP2315546B1 (fr) 2019-09-11

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PL (1) PL2315546T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20110942A1 (it) * 2011-10-19 2013-04-20 Indesit Co Spa Macchina lavastoviglie
CN103829899A (zh) * 2014-03-05 2014-06-04 傅子泽 洗碗机
DE102017202783A1 (de) * 2017-02-21 2018-08-23 BSH Hausgeräte GmbH Geschirrspülmaschine mit Hydraulikanordnung zum Reinigen einer Filtereinrichtung und Verfahren

Non-Patent Citations (1)

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PL2315546T3 (pl) 2020-04-30

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