DE102015203532A1 - Household dishwasher for washing items in one or more partial rinses and associated method - Google Patents

Abstract

Household dishwasher (GS) for washing items in one or more water-carrying Teilspülgängen (eg VG, RG, ZG, KG) and for subsequent drying of the items in at least one subsequent drying cycle (TG) to be performed a wash cycle (SG) - with a washing (SB) for receiving the items to be washed, - having at least one filling reservoir (WT1) attached to the outside of the washing container (SB), the inlet (IL1) of which has a fresh water supply device (ZLV) for filling with fresh water (FW *) from a fresh water network ( WN), and its outlet (OF1) with an outlet-side fresh water discharge device (ALV) for removing a respective to be performed Teilspülgang (eg RG) respectively required fresh water amount (ΔWMi with i = VG, RG, ZG, KG) from the Filling reservoir (WT1) and is connected to the supply in the washing compartment (SB), - with at least one heat pump (WP1), whose cycle is a Ko mpressor (CO), pressure reducing means (DM), an evaporator (VD1) and a condenser (VF1), wherein the evaporator (VD1) with the filling reservoir (WT1) for the withdrawal of heat energy (QP1) from stored there fresh water (FW) thermally is coupled and the condenser (VF1) is provided for feeding heat energy (QP1 *) into the interior of the washing compartment (SB), and - with a between the interior of the washing compartment (SB) and the interior of the filling reservoir (WT1) on or multilayer insulation material system (SW1, BI, IS1, WI1).

Description

The invention relates to a household dishwasher for washing items in one or more water-carrying Teilspülgängen and for subsequent drying of the items to be washed in at least one subsequent drying cycle of a rinse cycle to be performed.

In conventional dishwashers, an electric water heater, in particular with at least one electrical heating resistor, is usually provided in order to be used for at least one water-carrying partial rinse cycle, such as, for example, for the cleaning cycle and / or final rinse cycle, of a rinse cycle to be carried out for heating a quantity of water respectively filled into the rinsing container of the dishwasher to a required temperature. It can e.g. be formed in the form of a water heater. It is preferably a component of the liquid circulation circuit of the dishwasher, which in particular a circulating pump, possibly a water separator for selective coupling of several sprayers leading supply pipes to the output pipe of the circulation pump, one or more sprayers, attached to the bottom of the washing tank sump, in in which the flushing liquid sprayed out by the one or more spraying devices collects in the washing container, and / or possibly valves, liquid connecting lines, etc.. The water heater can be housed in particular in the housing of the circulating pump, so that a so-called heating pump is formed. The mode of action of a water heater is based, in particular, on the principle of electrical resistance heating, in which electrical energy is converted into thermal energy and this energy is transferred to the water flowing past it or in the water heater. In practice, e.g. a so-called tubular heater be used, which is preferably in a water-carrying, in particular water-flowed pipe. Alternatively, e.g. Also, a pipe section may be provided, which is externally provided with at least one tubular heater or a so-called thick film Heizleiterbahn and is flowed through in the interior of water when the circulating pump of the dishwasher. The heating of the amount of water that is required for the implementation of the respective Teilspülgangs, such. the cleaning cycle and / or rinse cycle, is admitted into the washing, to a required minimum temperature requires the generation of a certain thermal energy or heat energy by the electrical resistance heating, which brings a corresponding need for electrical energy. It is desirable to keep this electrical energy consumption as low as possible.

The object of the invention is to provide a domestic dishwasher, in which for heating a Spülgangs a Geschirrspülprogramms the electrical energy use to cover the thermal energy requirement of one or more Teilspülgänge, in which or each heat a specific amount of water in the washing to a desired minimum temperature is reduced.

This object is achieved by a dishwasher according to the invention having the features of claim 1:

• – mit einem Spülbehälter zur Aufnahme des Spülguts,
• – mit zumindest einem außen am Spülbehälter angebrachten Füllreservoir, dessen Einlauf mit einer einlaufseitigen Frischwasser-Zuführvorrichtung zur Befüllung mit Frischwasser aus einem Frischwassernetz verbunden ist, und dessen Auslauf mit einer auslaufseitigen Frischwasser-Abführvorrichtung zur Entnahme einer für den jeweilig durchzuführenden Teilspülgang jeweils geforderten Frischwassermenge aus dem Füllreservoir und zu deren Zuführung in den Spülbehälter verbunden ist,
• – mit zumindest einer Wärmepumpe, deren Kreislauf einen Kompressor, Druckminderungsmittel, einen Verdampfer und einen Verflüssiger umfasst, wobei der Verdampfer mit dem Füllreservoir zum Entzug von Wärmeenergie aus dort gespeichertem Frischwasser thermisch gekoppelt ist und der Verflüssiger zur Einspeisung von Wärmeenergie in den Innenraum des Spülbehälters vorgesehen ist, und
• – mit einem zwischen dem Innenraum des Spülbehälters und dem Innenraum des Füllreservoirs ein- oder mehrlagigen zur Verringerung eines Wärmestroms aus dem Spülbehälter.

Household dishwasher for washing items in one or more water-carrying Teilspülgängen and for subsequent drying of the items to be washed in at least one subsequent drying cycle of a rinse cycle to be performed

• - with a rinsing container for holding the dishes,
• - With at least one externally attached to the washing tank filling reservoir whose inlet is connected to an inlet side fresh water supply device for filling with fresh water from a fresh water network, and its outlet with an outlet side fresh water discharge device for removing a respective required to be carried out Teilspülgang required amount of fresh water from the Filling reservoir and is connected to the supply in the washing container,
• - With at least one heat pump whose cycle includes a compressor, pressure reducing means, an evaporator and a condenser, wherein the evaporator with the filling reservoir for the withdrawal of heat energy from fresh water stored there is thermally coupled and provided the condenser for feeding heat energy into the interior of the washing is and
• - With a one or more layers between the interior of the washing and the interior of the filling reservoir to reduce a heat flow from the washing.

The filling reservoir thus serves, on the one hand, as a filling tank, from the outlet of which a fresh water quantity required for the respective partial washing cycle enters the washing container via a discharge device. On the other hand, the filling reservoir for the circulation of the heat pump forms a heat source or a heat reservoir from which or from which the evaporator of the heat pump pumps heat energy. So there is no additional, dedicated and closed tank needed as a heat storage.

In addition, the filling reservoir can serve, in particular, to cool the wall which it occupies, in particular contacted, during the drying cycle of a rinse cycle, so that condensation drying on the inner wall surface in the interior of the rinsing container is favored. The filling reservoir thus also functions as a heat exchanger with a cooling function for drying support.

The thermal insulation system or the thermal insulation system, which is provided between the interior of the washing and the interior of the filling reservoir, on the one hand as a thermal barrier or barrier between the interior of the washing and the interior of the filling reservoir ensures that during operation of the heat pump this (based on a desired heating time) more heat energy can be pumped into the total rinse tank as a whole is lost to the outside by heat transfer from the washing. On the other hand, the single-layer or multi-layer insulation material system or thermal insulation system nevertheless produces a weak thermal coupling between the interior of the washing container and the interior of the filling reservoir in such a way that loss heat, which is caused by the transport of heat from the interior of the washing container through the insulation material system, can be collected by the fresh water in the filling reservoir and pumped back into the washing by the heat pump at their re-start. It leaves only a time delayed, i. throttled or reduced passage of heat from the washing back to the filling reservoir. The filling reservoir thus also serves as a collecting or collecting means of heat loss, which escapes through the respective wall of the washing, to which the filling reservoir is externally attached, by heat transfer. It is thus advantageously allows a heat recovery by a heat circulation circuit, the filling reservoir as a heat source, the heat pump as a means of transport for the pumped out of the filling heat, the rinse tank as a heat sink, and the single or multi-layer insulation material system between the interior of the washing and the Interior of the filling reservoir as a thermal coupling agent with Retardations-, ie Braking function for the heat transfer from the interior of the washing container into the interior of the filling reservoir comprises. The single-layer or multi-layer insulation material system thus reduces a heat flow from the rinsing container into the filling reservoir (in comparison to the case where a filling reservoir is attached directly to a wall of the rinsing container directly in thermal contact without additional thermal insulation material).

In this way, the dishwasher according to the invention is particularly efficient with electrical energy operable, i. The electrical energy input per cycle can be compared to a conventional dishwasher (without heat pump and without inventively designed and arranged Füllreservoir) significantly reduced.

Due to the multiple function of the filling reservoir as a fresh water filling agent for the washing, as a heat reservoir for the heat pump, as a heat exchanger with cooling function for drying support, and as a collecting or collecting means of heat loss from the washing the range available in the housing of the dishwasher scarce space to Accommodating all these features and the design of the domestic dishwasher can be kept simple despite the use of a heat pump. In particular, the previous basic structure of a dishwasher can be maintained with a water tank attached to the outside of its washing container, which can be filled with fresh water for drying support.

Since the filling reservoir with fresh water on the inlet side fresh water supply from a fresh water network can be filled and from this one for the respective part to be carried out in the washing each required amount of fresh water on the outlet side fresh water discharge device is partially or completely removed, is a partial or complete water change in the filling reservoir from a rinse to the next, subsequent later rinse or even a partial rinse to the next partial rinse within the duration of a rinse allows. Through this exchange of water, an unacceptably high infestation of the filling reservoir with microorganisms or other impurities can be largely avoided.

If, in at least one partial wash cycle, in particular for several partial wash cycles, of the wash cycle of a running dishwashing program, one fresh water quantity required for the respective partial wash cycle is removed, and for at least one partial wash cycle, in particular the same partial wash cycle, fresh water is replenished into the fill reservoir by means of the fresh water feed device is, at least a partial or even a complete water change in the filling reservoir per rinse cycle, in particular even by partial rinse, carried out. As a result, the risk of impermissible contamination of the filling reservoir according to the invention with unwanted microorganisms is greatly reduced in comparison with a completely closed heat storage tank.

In particular, the fresh water supply device has a water softening system, preferably an ion exchanger. Thus, the filling reservoir is in advantageously filled with softened fresh water, which is indeed used after the respective removal process as a rinsing liquid in the washing container for the respective water-conducting partial rinse a rinse cycle.

According to an advantageous embodiment of the invention follows after a phase such. in the cleaning cycle, during which a heat pump operation has been carried out for heating a quantity of water in the washing container to a desired temperature for the first time, which has led to a decrease, in particular exhaustion of the amount of thermal energy in the fresh water of the filling reservoir, expediently a regeneration phase for refilling the filling reservoir with thermal energy. This sequence of heat removal from the filling reservoir by the heat pump and thermal regeneration of the filling reservoir can be advantageously set by means of a control device which controls and / or regulates the heat pump. During this regeneration phase, the heat pump is in particular switched off or reduced in its pumping power. For this purpose, its compressor preferably receives a corresponding influencing signal from the control device, in particular control and / or regulating device. In particular, during the regeneration phase, ice water / solid ice accumulating in the fill reservoir during a preliminary, first heat pump operation for a partial wash cycle, such as, for example, is removed. has formed the cleaning cycle, thawed, i. liquefied. Ice water is understood to mean a mixture of ice chips and liquid water. The regeneration phase ensures that sufficient fresh water is present in liquid form in the filling reservoir in order to supply from the filling reservoir a desired amount of fresh water for filling the rinsing container for a subsequent partial rinsing cycle (without or with heat pump operation), e.g. to be able to easily remove the intermediate rinse cycle of a rinse. In addition, after its regeneration, the filling reservoir is again charged with thermal energy so far that a second phase with heat pump operation, such as e.g. can follow in the rinse cycle. The thermal regeneration of the filling reservoir is thus in particular at least such that, after a first phase with heat pump operation, such as e.g. during the cleaning cycle, for heating a first quantity of water in the washing container to a desired first temperature, a subsequent, renewed operation of the heat pump, e.g. the rinse cycle, for heating a second amount of water in the washing container to a desired second temperature is possible.

In particular, during a period of time with the heat pump switched off, such as e.g. the intermediate rinsing, the between two temporally spaced, each comprising a heat pump operation comprising heating periods, in particular two temporally separated Teilspülgänge such. the cleaning cycle and the rinse cycle of a rinse, ice water and / or solid ice, which has formed in the filling reservoir by the heat extraction by the evaporator during the first heating period or first phase with heat pump operation, especially during the heating period of the cleaning cycle, thawed and liquefied Fresh water in the filling reservoir heated to such a temperature that subsequently the second heating of a certain amount of water in the washing, such as the rinse cycle, to a desired minimum temperature by means of the heat pump is possible. In this case, the fresh water stored in the filling reservoir is preferably heated again to a temperature which is above the freezing point of water, in particular at least 4 ° C, preferably between 15 ° C and 30 during the regeneration period, which is between the two staggered phases with heat pump operation ° C is.

The thermal regeneration of the filling reservoir can preferably by the return of the introduced into the washing heat energy from the interior of the washing container through the thermal insulation system into the interior of the filling reservoir in, i. done by heat loss from the washing.

Supporting this, if necessary, the ambient heat at the location of the dishwasher contribute to the thermal regeneration of the filling reservoir, since fresh water content of the Füllreservoirs after a phase with heat pump operation has a temperature lower than the ambient temperature, so that it comes due to this temperature gradient to a transport of ambient heat to the filling reservoir.

In particular, it may additionally be expedient if, for the purpose of thermal regeneration of the filling reservoir, fresh water is replenished by means of the feed device from a fresh water network into the filling reservoir. The thus refilled fresh water usually has an inlet temperature which is higher than the temperature of the cold water or ice water / solid ice in the filling reservoir, which has formed there after a phase with heat pump operation such as after the heating time during the cleaning cycle. While the ice water / ice in the filling reservoir at the end of the phase with heat pump operation has a temperature of less than 4 ° C, especially below 0 ° C, the fresh water entering the filling reservoir from a house-side fish water network usually has 15 ° C or more and is thus 10 ° C-15 ° C warmer than the cold water or ice water / ice in the Filling reservoir, which has formed after a phase with heat pump operation in the filling reservoir. Due to the high heat capacity of water compared to air is through this supply of fresh water in the filling reservoir whose thermal regeneration particularly efficient and fast. In particular, the contact of the fresh water entering the filling reservoir with the ice water / ice present there ensures a short thawing time, which is shorter than in the case that a thermal regeneration would take place only via the heat loss and / or ambient heat. If the thermal regeneration of the filling reservoir is carried out by supplying fresh water, it is possible in particular to provide a heat-insulating element with a particularly lower specific heat transfer coefficient between the washing container and the filling reservoir, so that the heat energy introduced into the washing container by means of the heat pump can be held even better therein which can bring benefits to the overall energy balance of the dishwasher per wash cycle. For the regeneration of the filling reservoir by means of the supply of fresh water, it is expedient if the container of the filling reservoir has a sufficiently large refilling volume for fresh water in addition to its ice storage volume and a sufficient contact zone between the ice and the refilled fresh water is provided.

Generally speaking, it may be expedient if the inlet-side fresh water supply device is designed for supplying fresh water into the filling reservoir, and / or in particular with the aid of a control device is adjustable such that after the heating phase of a partial rinse, in which the amount of water present in the washing has been heated with the aid of the condenser of the heat pump and at the existing in the filling reservoir amount of fresh water with the aid of the evaporator of the heat pump to a cold water temperature which is lower than the inlet temperature of the fresh water, in particular to less than 8 ° C, preferably partially or completely Frozen to ice, fresh water is recaptured with a relation to the cold water temperature higher inlet temperature for regenerating this cold water or ice in the filling reservoir. For this purpose, the container of the filling reservoir expediently has a sufficiently large refilling volume for fresh water in addition to its ice storage volume. This avoids that the fresh water that is refilled to thaw the ice into the filling reservoir, too much cooled in the washing, especially during the ongoing Teilspülgangs with heat pump operation or a subsequent water-carrying Teilspülgangs, passes, but can remain in the filling reservoir until it has been heated by heat loss from the washing to a sufficiently high temperature.

Expediently, the filling reservoir in addition to its predetermined for liquid fresh water desired filling volume on a free space or space in the ice water / ice, which can form from the stored fresh water in the filling reservoir by the cooling by means of the evaporator during operation of the heat pump due its volume increase (compared to the space occupied by liquid water volume) can expand. Possibly. the additional clearance can also be provided by the fact that for the filling reservoir, a material, in particular plastic is selected, which is compliant and thereby expand the volume enclosed by the container of the filling reservoir with ice formation or can increase. As a result, the container of the filling reservoir remains permanently functional, i. Damage to the filling reservoir are thus avoided.

In particular, it may be expedient that the filling reservoir has been filled with fresh water with a sufficient waiting time already before the start of the rinse cycle of a dishwashing program to be carried out, in particular during the preceding rinse cycle, in particular all its intended filling volume intended for liquid water has been filled with fresh water that fresh heat in the filling reservoir is heated to approximately room temperature at the site of the dishwasher by heat transfer from the environment. In this case, the filling reservoir from the outset has a higher temperature level and thus a higher thermal storage density (in the sensitive heat range) than a heat storage tank, which would be filled with fresh water only at the beginning of the first Teilspülgangs the wash cycle of a dishwashing program to be carried out. This saves electrical energy in the subsequent operation of the heat pump, since this is a higher coefficient of performance, i. a higher COP ("coefficient of performance") results.

Appropriately, the filling reservoir is on the outside of a wall, in particular side wall, of the washing. In particular, it is there fixed surface contacting firmly attached. This ensures that heat losses from the washing container can be absorbed by the fresh water of the filling reservoir and stored in this and can be transferred back into the washing container at the next startup of the heat pump via the condenser.

Conveniently, the filling reservoir is designed as a hollow body, in particular flat box or cuboid. As a result, it carries on the outside of the wall of the washing up little, so that predetermined dimensions or dimensions of the dishwasher can be met. It preferably has a filling volume between 2 and 10 l.

According to an advantageous embodiment of the invention, the thermal insulation material system comprises at least one, in particular flat, thermal insulation element, which is designed as a solid body, in particular as Dämmvlies or Schaummateriallage. As a result, a thermal barrier or thermal brake is permanently present between the interior of the washing container and the interior of the filling reservoir. As a result, it is only possible by means of the heat pump to pump heat energy from the fresh water stored in the filling reservoir into the interior of the washing container and thus to heat it, without this pumped-in heat energy being recovered immediately - even during operation of the heat pump - largely or for the most part escapes from the washing and would be transported back into the contrast, colder fresh water of the filling reservoir by heat transfer. The thermal insulation material system thus causes a time delay or slowing down for the heat transport process or heat flow out of the interior of the washing container, i. It keeps the heat energy pumped by the heat pump in total in the washing and trapped therein heat energy for a predetermined period of time or back. This can be determined depending on the choice of material of the insulation material system. The heat flow from the washing through the wall with the externally mounted filling reservoir is reduced by the provided between these thermal insulation system against heat flow from the washing, which passes through a wall of the washing without Füllreservoir and without thermal insulation system.

According to an advantageous embodiment of the invention, it is provided that the flat heat-insulating element expediently rests on the outer wall of the washing container or treatment container outside or on a covering layer applied on the wall, in particular bitumen layer, and overlying the filling reservoir in a contacting manner. In this multi-layer construction, the covering layer, in particular bitumen layer, on the outside of the wall allows the fulfillment of further requirements such as e.g. to the shielding of noise from the washing, while the thermal insulation element ensures the required thermal barrier or brake between the interior of the washing and the interior of the filling reservoir. In addition, no changes to the usual basic design of a washing container is required, which is occupied on the outside for Entdröhnung with bitumen mats.

In particular, it is energetically advantageous if the filling reservoir covers at least 50%, in particular between 70% and 100%, of the total area of its associated wall, preferably substantially the total area of its associated wall, of the washing compartment on the outside. The larger the surface portion of the respective wall of the washing container, which is occupied from the outside of the filling reservoir, the more can be collected through this from the washing escaping heat energy - despite externally applied to the wall thermal insulation element - by the fresh water stored in the filling reservoir.

It may be particularly useful if several, in particular the two opposite side walls of the washing container are each covered by at least one filling reservoir from the outside. The more walls of the washing container are each provided with a filling reservoir on the outside, the better heat losses from the washing container can be captured in the fresh water of the respective filling reservoir, which leads to its heating. This still less heat energy is lost from the washing to the environment at the location of the dishwasher, but it remains in the heat circulation system of filling reservoir, heat pump and washing. It is especially favorable if, in each case, a filling reservoir which is filled with fresh water is attached to the outside of all walls of the washing container in a corresponding manner. Then any heat energy escaping from the washing container can be collected around the filling reservoir and used again for the next heat pump operation.

It may be expedient, in particular, if the evaporator of a specially provided heat pump is thermally coupled to each filling reservoir. Alternatively, a plurality of filling reservoirs may be thermally coupled to the evaporator sections of the evaporator of a common heat pump. This is less expensive. According to a further advantageous variant, the evaporator of the heat pump can be thermally coupled to only one filling reservoir or a first group of filling reservoirs, while the remaining filling reservoirs or the second group of filling reservoirs are fluidically connected to this filling reservoir or this first group of filling reservoirs and manage without evaporator coupling ie are evaporator-free. As a result, the design effort can be kept within limits.

According to a further expedient development of the invention, the filling reservoir is thermally more insulated on its side facing the washing container wall side than on its side facing away from the washing, in particular the environment facing wall side. This can be done also collect heat energy from the environment at the location of the dishwasher through the fresh water of the filling reservoir. In this case, a thermal insulation layer on the side facing away from the washing container wall of the filling reservoir ensures that there is an undesirable large Auskondensierung of moisture from the ambient air is largely avoided. This is advantageous because the dishwasher can be placed free of condensation problems in kitchen spaces. In particular, it is suitable for installation in a kitchen furniture tables, without the risk of damage to adjacent kitchen furniture parts by condensate.

Possibly. but it can also be sufficient, e.g. if a corresponding condensate collecting element is provided, which is associated with the respective outer wall of the filling reservoir facing away from the washing container. Then, the thermal insulation can be omitted on the side facing away from the washing of the filling reservoir.

According to an expedient development of the invention, the thermal insulation material system as a whole has a heat transfer resistance R _T of at least 0.02 (Km ² ) / W, in particular between 0.1 (Km ² ) / W and 1 (Km ² ) / W, on. As a result, a sufficient thermal barrier or brake is provided for the heat energy introduced into the interior of the washing container during a partial washing cycle, ie it remains in the interior of the washing machine for the duration of the partial washing cycle such that a profile of the washing process required for this partial washing cycle remains temporal temperature profile in the interior of the washing can be maintained. This profile preferably corresponds approximately to the temporal temperature profile of the same partial wash cycle in a conventionally designed dishwasher (without heat pump). On the other hand, the weak thermal coupling effect of the insulation material system is sufficient to cool the wall of the rinsing container at the outside of the filling reservoir, sufficient for a desired condensation drying relative to the air and / or the items to be washed in the rinsing when the filling reservoir previously at the Drying immediately immediately preceding Teilspülgang, such as rinse cycle, is cooled by the heat pump operation. This applies a fortiori, if, according to an advantageous development of the invention, the heat pump continues to be operated during the drying cycle, ie is switched on.

According to an advantageous development of the invention, it is favorable for the energy balance of a rinse when the filling reservoir with the washing so in thermal communication, in particular by a the interior of the washing and the interior of the filling reservoir separating insulating material system are thermally coupled to each other, and that Liquid total filling volume of the filling reservoir is selected such that the product of the thermal resistance Rth (unit: K / W) of the insulation material between the interior of the washing and the interior of the filling reservoir and the heat capacity Cth (unit: (W sec) / K) the amount of water stored in the filling reservoir gives a thermal time constant τ (unit: min (minutes)) between 5 minutes (minutes) and 60 minutes, in particular between 10 minutes and 30 minutes for the transfer of heat from the washing container into the filling reservoir. The time constant τ indicates a simple measure or a reference variable for the time after which an amount of heat introduced into the rinsing container discharges itself via the thermal insulation material system into the filling reservoir (by heat transport). After the period of time τ, according to a first estimate, the difference between the temperature in the washing container and the temperature in the filling reservoir has fallen to about 37% of its initial value, which is present at the end of a heating-up period for a water-carrying partial washing cycle.

If the wall of the preferably made of metal, in particular stainless steel washing container, attached to the outside of the filling reservoir, with a bituminous layer as Entdröhnung or sound insulation, in particular of usually between 2 mm and 10 mm wall thickness, is occupied, and in addition at least one thermal insulation element such as a non-woven or a foam body is applied, tests have shown that it is advantageous for a sufficient thermal barrier effect, if for the heat-insulating element, a material having a specific thermal conductivity of at most 0.5 W / (mK), in particular between 0.1 and 0.005 W / (mK) is selected. Excessive cooling of the washing container by the filling reservoir, whose fresh water filling is cooled by the evaporator of the heat pump during operation and / or made ice water / ice, then largely avoided compared to a conventionally constructed dishwasher (without heat pump), so that the required, can be maintained over the time progress of the rinse to be traversed temperature profile in the washing despite the cold water and / or ice in the filling reservoir.

It may be favorable, in particular, if the thermal insulation system is designed to be changeable, preferably switchable, with regard to its specific thermal conductivity. Advantageously, it is thermally more insulating during the water-carrying Teilspülgänge, especially those with aufzuheizender rinsing liquid than in the drying cycle. In other words, his specific thermal conductivity for the drying cycle compared to the one or more preceding water-conducting Teilspülgängen increased. The thermal insulation between the filling reservoir and its associated Spülbehälterwand is thus advantageously designed as a switchable thermal insulation such that it is better thermally conductive in the drying phase than before in the one or more water-bearing Teilspülgängen and thus the heat of condensation from the washing with conductive isolation better is discharged into the filling reservoir. This change in the specific thermal conductivity of the thermal insulation system can be made in particular by means of the control device.

In order to enhance the cooling of the inside of the wall of the washing container, on the outside of the filling reservoir is mounted, during the drying cycle of a wash cycle, it may be particularly useful when the heat pump is turned on during the Spülgangabschließenden drying cycle, i. operated operationally. This is particularly useful if, in the preceding partial wash cycle with heat pump operation such as e.g. during the rinse cycle, there is no freezing of the water in the filling reservoir, i. the water in the filling reservoir remains liquid despite heat pump operation. By the heat pump operation in the drying cycle an active, continuous cooling of the wall of the washing container to which the filling reservoir is mounted, in particular, ensures, and it can take place in the interior of the washing improved condensation drying. It may be beneficial in this context if the condenser of the heat pump is in direct or indirect thermal contact with the air in the washing container, so that it is actively heated during the drying cycle through the condenser and thus becomes receptive to moisture.

Possibly. can be caused by the active operation of the heat pump cooling the amount of fresh water in the filling reservoir during the drying cycle be so large that it is not necessary to provide a switchable thermal insulation element, but it can meet a stationary trained, non-switchable thermal insulation element.

Under certain circumstances, it may be favorable if the filling reservoir is provided on the inside and / or outside with a thermal insulating element or thermal insulation element at least on its wall facing the washing compartment. This can bring manufacturing advantages because the filling reservoir is present as a prefabricated unit, can be stored as such, and can be mounted as a whole with existing thermal insulation element to the respective associated wall of the washing. An additional assembly step for attaching a separate heat-insulating element on the filling reservoir facing wall of the washing can then be saved. This is favorable for the mass production of household dishwashers.

Possibly. the filling reservoir can be provided all around with a thermal insulation cover. As a result, unwanted condensation of moisture from the ambient air at the location of the dishwasher, in particular on the wall of the washing container facing away from the washing compartment, can be reduced or avoided if the filling reservoir is strongly cooled by the operation of the heat pump.

It may be particularly useful when the filling reservoir is provided with a complete shell of PCM, ie all around the inside wall and / or outside wall with PCM ("phase change material") as insulating material whose phase change temperature is higher than that of the fresh water cached in the filling reservoir, in particular between 3 ° C and 10 ° C. Its phase change temperature is preferably lower than the temperature in the rinsing tank at the end of the respective heating period of the respective partial rinse with aufzuheizender rinsing liquid selected, for example, the cleaning cycle or rinse cycle, so that heat loss from the rinse tank can be stored as latent heat in him. Conventional PCM materials such as paraffins have relatively poor heat-conducting properties, ie they act thermally insulating. In this way, the filling reservoir can be thermally insulated internally and / or externally by PCM material mounted on the inside and / or outside wall. Due to the fact that the phase change of the PCM material takes place at a higher temperature level than the phase change of the water, the temperature of the wall of the filling reservoir at the outside of the filling reservoir facing away from the washing container remains approximately constant at the melting temperature during the period of time, due to the release of latent heat the heat pump is in operation and makes the fresh water in the filling reservoir to ice water and / or ice. When the heat pump is off, the PCM material absorbs heat from the environment and / or heat lost from the purge bin and melts, causing it to be at least at a melting temperature that is higher than that of water in the fill reservoir. In a kitchen is usually expected at a temperature of about 15 ° C-24 ° C, so that the PCM material has its melting temperature, which is higher than that of ice water / solid ice and lower than the ambient temperature. Because of this reduction in the temperature gradient between the temperature of the ambient air and the temperature of the washing tank applied to the outer wall of the filling reservoir compared to the case that the Rinsing vessel facing away from the outer wall of the filling reservoir is without PCM material, less water from the ambient air on the side facing away from the washing container outside of the filling reservoir can condense. As a result, contamination or damage to the floor and / or adjacent kitchen furniture parts at the installation of the dishwasher are largely avoided. If the fresh water in the filling reservoir after completion of the last heat pump operation such as the rinse cycle has cooled strongly, in particular to less than 4 ° C, preferably below 0 ° C and ice water / solid ice, so then also slows down its phase change temperature cooled and solidified PCM the heating of the cold water or ice water / solid ice in the filling reservoir by the heat loss escaping from the washing container in comparison to a filling reservoir without PCM. This is favorable for the flushing final drying cycle.

In particular, it may already be sufficient if the filling reservoir has at least one thermal insulation layer or layer, in particular of PCM, on the outside of the wall and / or on the inside only on its wall facing the washing compartment. At its other walls, a thermal insulation, in particular PCM material may be omitted. This saves insulation material and can be constructive and montageetechnisch favorable. It is thus provided in a simple manner between the interior of the washing and the interior of the filling reservoir, an inventive weak thermal coupling coupling insulation system.

Finally, it may also be expedient if at least one PCM element or component is accommodated in the interior of the filling volume of the filling reservoir, the phase change temperature of which is expediently higher than that of water, in particular between 3 ° C. and 20 ° C. The PCM element is at full filling of the filling reservoir with water surrounded by this preferably all around. This makes it possible to lift the filling reservoir to a higher temperature level than without PCM in a particularly favorable manner, so that the COP of the heat pump is improved.

In particular, paraffins may be chosen as the PCM material. It is conveniently enclosed in a completely sealed envelope so that when it exceeds its phase change temperature, i. can not leak in the liquid state.

In addition or independently to the above advantageous embodiment, it may be expedient if a PCM material is used for the thermal insulation element between the washing container and the externally mounted filling reservoir, i. Expressed in general terms, in this advantageous variant, at least one layer or layer of PCM is inserted between the wall of the filling reservoir facing the washing compartment and the wall of the washing compartment facing the filling reservoir. For the PCM, the melting temperature is advantageously selected to be higher than that of water and lower than the temperature in the washing container at the end of the heating time period of the respective partial washing cycle with the washing water to be heated. This helps the filling reservoir to a higher temperature level, which advantageously leads to a higher COP of the heat pump. Moreover, as explained above, this is also favorable for the drying cycle, since the wall of the washing container to which the filling reservoir is attached is kept sufficiently cool for a desired condensation of moisture from the moist-warm air in the washing container on it during the drying cycle can. A thermal insulation, in particular a PCM jacket of the filling reservoir can then be omitted if necessary.

According to an advantageous development of the invention, the heat pump can be designed and / or operated in particular by means of a control device such that at the end of the carried out by the heat pump heating period of a Teilspülgangs a Spülbadmenge present in the washing water to a required minimum temperature with the aid of the condenser of the heat pump heated and the fresh water is cooled in the filling reservoir by means of the evaporator of the heat pump to a temperature in the range between -4 ° C and + 10 ° C, in particular between 10% and 90% of the maximum filling volume of water, especially fresh water, in the filling reservoir in the frozen State is brought. Then, both the sensible heat and largely the latent heat can be pumped out of the amount of water present in the filling reservoir and pumped into the washing by the heat pump. In this way, a relatively small volume of the filling reservoir, preferably 2 l-10 l capacity volume, suffice to heat with the heat pump in the rinsing container for the respective partial rinse amount of water to a desired, predetermined temperature.

Furthermore, it may be expedient if the filling reservoir with the washing container in such thermally operative connection, and / or the heat pump is designed and / or in particular operated with the aid of a control device such that the temperature of the fresh water in the filling reservoir during the period after the end of the heating period of a previous Teilspülgangs, wherein the amount of water present in the washing container heated with the aid of the condenser of the heat pump has been, until the start of a subsequent Teilspülgangs, in particular until the start of a subsequent Teilspülgangs in which the heat pump is put back into operation, is lower than the temperature in the washing, and in particular predominantly during this period of time lower than the ambient temperature at the location of the household Dishwasher is. Then, the filling reservoir collects particularly low heat loss from the washing and ambient heat and can already regenerate over this thermally. Its thermal regeneration by means of the supply of fresh water may then possibly be less frequently necessary or even omitted, so that fresh water can be saved. Also, then a relatively small filling volume of the filling reservoir, in particular between 2 l and 10 l suffice.

It may be advantageous, in particular, if the filling reservoir is in thermal communication with the washing container, and / or the heat pump is designed and / or operated in such a way with the aid of a control device such that ice / ice water is formed during the heating-up period a preceding Teilspülgangs, in which the amount of water present in the washing container has been heated with the aid of the condenser of the heat pump, has formed in the filling reservoir due to heat removal by the evaporator until the start of a subsequent Teilspülgangs, in particular until the start of a subsequent Teilspülgangs in which the Heat pump is put into operation again, essentially by heat transfer from the washing container into the filling reservoir and / or possibly by heat transfer from the environment of the household dishwasher in the filling reservoir into at least 25%, in particular between 40% and 100%, preferably 100%, of its ice volume present at the end of the heating-up period of that preceding partial rinse, and that the thawed water in the filling reservoir for starting the subsequent partial rinse cycle is in particular at a temperature of at least 0 ° C., preferably between 15 ° C and 30 ° C, has. Then, a sufficient amount of liquid water for the subsequent partial wash cycle can be removed from the filling reservoir and fed to the washing. In particular, the filling reservoir can be used again as a heat source for the renewed operation of the heat pump.

Advantageously, the filling reservoir is designed as an open memory, i. During the respective wash cycle, in particular even per water-conducting partial wash cycle, fresh water stored at least once is withdrawn via the drainage device and new fresh water is supplied via the feed device at least once during this wash cycle, in particular partial wash cycle. Through this partial or complete water exchange or water change a contamination of the filling reservoir with microorganisms is largely avoided, as is otherwise possible in a closed, with water once-full heat storage tank. Even the risk of unpleasant odors is uncritical in an open storage. In addition, due to the partial or complete water exchange or water change advantageously also a thermal regeneration of the filling reservoir is possible in an efficient manner. By the one or more times removal and supply of fresh water per wash, preferably by at least one removal and at least one feed per water-conducting Teilspülgang, especially at the end of each water-conveying Teilspülgangs or in the transition phase of a water-carrying Teilspülgang to the next Teilspülgang a wash cycle, can also possibly a water movement, in particular flow dynamics or water flow generated in the filling reservoir, ie Convection be forced, resulting in a thorough mixing of the newly flowing from the feeder fresh water amount and the already existing in the filling reservoir amount of water. It thus sets a mixing temperature for this water mixture in the filling reservoir, which is located between the inlet temperature of the fresh water inlet and the current temperature of the existing water in the filling reservoir. If an operation of the heat pump for a desired heating time of a Teilspülgangs and thereby extracted by means of the evaporator containing in the filling water amount of heat energy, the amount of water is cooled in the filling reservoir and generated in particular for the use of latent heat energy stored in the water ice. Now, if fresh water is admitted into the filling reservoir by means of the feeding device at least once during the period of heat extraction by means of the evaporator, the freezing of the amount of water present in the filling reservoir can be delayed, or if ice water / ice has already formed, this thawed, i. be regenerated. By supplying fresh water so the filling reservoir can be recharged or refreshed with thermal energy. For the removal of a certain desired amount of thermal heat energy by the heat pump can be made smaller by the supply of fresh water, the storage volume of the open filling reservoir for water than would be the case with a closed water tank.

It may be particularly advantageous if the filling reservoir is designed as an overflow store. Thus, if the filling reservoir is fed with new fresh water via the fresh water supply device, then the filling reservoir overflows and water flows by itself out of it via the discharge device in the washing container. There will be a change of water or water exchange in the filling reservoir. Such a spill storage design does not require a pump or valve in the discharge device to remove water from the filling reservoir. In addition, the intended filling volume of the filling reservoir always remains completely filled with water during the entire rinse cycle. As a result, the filling reservoir is viewed over the total duration of the entire rinse cycle in each water-carrying Teilspülgang with its entire intended storage volume either as fresh water filling for the washing, as a heat reservoir for the heat pump, as collecting or collecting means of heat loss from the washing, or if necessary, ready for the Spülülabschließenden drying cycle as a heat exchanger with cooling function for drying support, ie it is always fully functional.

Detached from the advantageous embodiment of an overflow accumulator, it may be expedient generalized in this context, if the filling reservoir, its inlet side fresh water supply device for supplying fresh water into the filling reservoir, and / or its outlet side fresh water discharge device for removing fresh water from the filling reservoir so is / are formed, and / or in particular with the aid of a control device is adjustable / are that the filling reservoir substantially the same amount of fresh water, which is removed from it for the respective water-carrying Teilspülgang and discharged via the fresh water discharge device in the washing, is re-supplied by the fresh water supply device largely overlapping in time to this removal. Then, the filling volume provided for the liquid water in the filling reservoir, viewed over the total duration of the respective rinse, always remains largely constant with water (provided that the filling volume in the filling reservoir is filled with water at the beginning of the respective rinse cycle). The filling reservoir, its inlet-side fresh water supply device for supplying fresh water into the filling reservoir, and / or its outlet-side fresh water discharge device for removing fresh water from the filling reservoir is / are suitably designed and / or adjustable in particular with the aid of a control device such that the filling reservoir during the one or more partial rinses and possibly also during the rinsing final drying course of the respective rinse, in particular on the one or more filling and / or Abpumpsequenzen the entire rinse away, always about the same target level, in particular maximum target level, the maximum Liquid filling volume of the filling reservoir is associated with fresh water, is filled.

It may be expedient according to a further embodiment, if the filling reservoir, its inlet-side fresh water supply device for supplying fresh water into the filling reservoir, and / or its outlet-side fresh water discharge device for removing fresh water from the filling reservoir is / are formed, and / or in particular with the aid of a control device is / are adjustable so that the supply of fresh water in the filling reservoir, in particular temporally and / or quantitatively coupled with the removal of fresh water from the filling reservoir for the respective water-conducting Teilspülgang, in particular correlated. This allows a variable or dynamic influence on the thermal storage capacity of the filling reservoir, whose collecting behavior with respect to the exiting from the washing heat loss, the thermal regeneration capacity, in particular thawing behavior of the filling reservoir, the removal behavior of the filling reservoir for filling the washing with fresh water, and / or its function as Coolant to support condensation drying during the respective drying cycle. Expressed in general terms, thermodynamic processes in the filling reservoir and / or rinsing containers can be specifically influenced, in particular controlled, in such a way that a required temperature profile in the rinsing container and / or in the filling reservoir can be maintained over the duration of the respective rinsing cycle.

It may be favorable, if in addition at least one water movement means, in particular flow generating means, is provided which forces a water movement, in particular water flow, preferably circulation flow, in the filling reservoir, in particular if the heat pump is in operation. This allows a more uniform cooling of the entire water in the filling reservoir through the evaporator. It may be premature freezing of water at individual local locations in the filling reservoir such. be avoided on the evaporator tubes. Thereby, the total content of sensitive and latent heat, which is in the respective total amount of water of the filling reservoir, pumped through the evaporator and pumped by means of the condenser of the heat pump in the washing to heat a liquid present there. This allows a comparison with a closed heat storage tank with stationary water, a smaller water storage volume for the filling reservoir, so that this can be attached to the outside of the washing of the dishwasher in compliance with their predetermined device dimensions.

According to an advantageous development of the invention, at least one detection means is provided for detecting at least one parameter which characterizes the respective heat energy content of the filling reservoir. As a parameter, in particular the temperature in the interior of the filling reservoir can be used. Additionally or independently of this, the temperature in the washing container can serve as a parameter. By means of this parameter characterizing the heat energy content of the filling reservoir, a control device can preferably control, in particular control and / or regulate the work flow, in particular the switch-on and / or switch-off states of the heat pump. Additionally or independently thereof, the control device can influence the thermodynamic processes in the filling reservoir and / or in the washing container in a targeted manner. For example, it can specify at what times which amount of fresh water is filled into the filling reservoir and / or what quantity of water is removed from the filling reservoir.

It can be energetically advantageous, in particular, if only the heat pump for heating rinsing liquid in the rinsing container is provided during the predetermined heating-up period of the cleaning cycle and during the predetermined heating-up period of the rinsing cycle of the respective rinsing cycle to be carried out.

To shorten the respective heating time or to achieve a respective required operating temperature during the respective water-carrying Teilspülgangs with aufzuheizendem rinsing liquid such. the cleaning or rinse cycle, it may be appropriate if in addition, i. e. parallel to the heat pump, an electric heater, in particular water heater is provided, which is in operation by a control device in addition to the heat pump for heating rinsing liquid in the washing to a required minimum temperature in operation, or by a control device only after the heating time of the heat pump after their switching off Reheating of rinsing liquid to a required minimum temperature in the washing in operation is acceptable. The additional heater can be dimensioned smaller in terms of their electrical power consumption and heat dissipation than in the case of a conventional dishwasher, which has no heat pump but only a conventional water heater.

• – wobei eine für den jeweilig durchzuführenden Teilspülgang im Spülbehälter geforderte Wassermenge teilweise oder ganz aus zumindest einem außen am Spülbehälter angebrachten Füllreservoir, dessen Einlauf mit einer einlaufseitigen Frischwasser-Zuführvorrichtung zur Befüllung mit Frischwasser aus einem Frischwassernetz verbunden ist, und dessen Auslauf mit einer auslaufseitigen Frischwasser-Abführvorrichtung zur Entnahme einer für den jeweilig durchzuführenden Teilspülgang jeweils geforderten Frischwassermenge aus dem Füllreservoir und zu deren Zuführung in den Spülbehälter verbunden ist, entnommen und dem Spülbehälter zugeführt wird,
• – wobei für zumindest einen der Teilspülgänge, für dessen Wassermenge im Innenraum des Spülbehälters eine Erwärmung auf eine Mindesttemperatur gefordert ist, Wärmeenergie mittels des Verdampfers einer Wärmepumpe aus dem im Füllreservoir gespeicherten Frischwasser entzogen und Wärmeenergie mittels des Verflüssigers der Wärmepumpe in den Innenraum des Spülbehälters eingespeist wird,
• – und wobei durch ein zwischen dem Innenraum des Spülbehälters und dem Innenraum des Füllreservoirs vorgesehenes ein- oder mehrlagiges Isolationsmaterialsystem ein Wärmestrom aus dem Spülbehälter verringert wird.

The invention also relates to a method according to the invention: A method for washing dishes in the washing container of a domestic dishwasher, which is designed in particular according to at least one of the preceding claims, in one or more water-carrying Teilspülgängen and for subsequent drying of the dishes in at least one subsequent drying cycle to be performed wash cycle,

• - Wherein a required for the respective sub-rinse in the washing required amount of water partially or completely from at least one externally attached to the rinsing tank filling reservoir whose inlet is connected to an inlet side fresh water supply device for filling with fresh water from a fresh water network, and its outlet with an outlet freshwater Discharge device for removing a respectively required for the respective partial rinse cycle required amount of fresh water from the filling reservoir and is connected to the supply in the washing, is removed and fed to the washing compartment,
• - Wherein for at least one of the partial rinses, for the amount of water in the interior of the washing a heating to a minimum temperature is required, extracted heat energy by means of the evaporator of a heat pump from the fresh water stored in the filling reservoir and heat energy is fed by means of the condenser of the heat pump into the interior of the washing .
• - And wherein a heat flow is reduced from the washing through a provided between the interior of the washing compartment and the interior of the filling reservoir single or multi-layer insulation material system.

Other developments of the invention are given in the dependent claims.

The above-described and / or reproduced in the subclaims advantageous embodiments and developments of the invention can thereby - except, for example. in cases of clear dependencies or incompatible alternatives - individually or in any combination.

The invention and its advantageous embodiments and further developments and their advantages will be explained in more detail with reference to exemplary embodiments illustrative drawings. They show, in each case in a schematic outline sketch:

1 a schematic front view of a first advantageous embodiment of an inventively designed dishwasher with a fresh water filling reservoir as a heat storage, to which a heat pump is coupled,

2 Timing diagrams for various components of the dishwasher after 1 to illustrate the course of the wash cycle of a dishwashing program to be carried out,

3 . 4 two advantageous modifications of the dishwasher of 1 .

5 Timing diagrams for various components of the dishwasher after 4 to illustrate the course of the wash cycle of a dishwashing program to be carried out,

6 - 9 further advantageous modifications of the dishwasher after 1 .

10 a diagram for characterizing the heat transfer behavior of the thermal insulation material system between the washing and a filling container attached to the outside of this, and

11 the filling reservoir of the dishwasher of 1 in side view.

In the 1 - 11 are elements with the same function and mode of action each provided with the same reference numerals. Only those components of a domestic dishwasher are provided with reference numerals and explained which are necessary for the understanding of the invention.

1 shows a schematic front view with the front door open, a first embodiment of a household dishwasher GS, which is designed according to the principle of the invention. Your front door is here omitted for the sake of simplicity of illustration. The dishwasher GS has a washing container SB. This is preferably made of metal, especially stainless steel. It is here box-shaped and comprises a first side wall SW1 and a second widthwise opposite side wall SW2, a top wall DW and one of these in the height direction opposite bottom wall BW, and seen in the depth direction, a rear wall RW. The bottom wall BW has a pump sump or a collecting area PS, in which rinsing liquid, which is sprayed by one or more spraying devices OS, US in the interior of the washing container SB, can converge or collect. The pump sump or pump well PS is preferably designed as a shaft-like trough, which is lower than the remaining approximately horizontal region of the bottom wall BW. From the pump sump PS, a first connection line WL5 leads to an emptying or wastewater pump EP, by means of which flushing liquid can be pumped out of the flushing container SB via a sewer line WL6, if required. From the pump sump PS, a second connecting line WL3 leads to a circulating or circulating pump UP. With their help, rinsing liquid can be sucked out of the rinsing container SB and distributed via one or more line pipes WL4 to one or more spraying devices OS, US. Possibly. is considered in the flow direction after the circulation pump UP a water switch WS provided. This is in the 1 dash-dotted lines with a switch symbol indicated. It makes it possible to fluidly connect the outlet of the circulation pump UP with the inlet of the conduit WL4 to a lower spray US and with the input of the conduit WL4 to a top sprayer OS - depending on the Spülgangablauf - selectively. The lower spray US and the upper spray OS are preferably formed by rotating spray arms. During the operation of the circulating pump, they spray rinsing liquid in the interior of the washing container SB. Possibly. can be provided starting from the water switch WS at least one further pipe to a further spraying device such as to a shower head or other liquid ejection device such as to a nozzle or the like.

In the interior of the washing container SB at least one receiving basket for cleaning dishes such as dishes, glasses and / or cutlery is housed in the depth direction (here perpendicular to the plane of 1 ) can be moved out of the rinsing container for discharging or loading and designed to be movable into the rinsing container for cleaning. Here in the embodiment of 1 is a lower dish basket UK the lower spray US and an upper dish basket OK associated with the upper spray OS. Possibly. can be provided above the upper rack basket OK a heraus- and hineinschiebbare cutlery drawer, which is assigned as a shower head on the ceiling wall DW for spraying with rinsing liquid. Such a cutlery drawer and overhead shower have been omitted here for clarity.

For Entdröhnung the rinsing container are one or more walls of the washing container SB, in particular the side walls SW1, SW2 and the bottom wall BW, each on the outside with a coating layer BI, in particular bitumen mat provided.

Externally on the covering layer BI of the first side wall SW1, a thermal thermal insulation element IS1 is applied in a contacting manner. On the outside of this surface contacting a filling reservoir or filling container WT1 is provided. Between the flushing tank SB facing inner wall WI1 of the filling reservoir WT1 and provided with the lining layer BI side wall SW1, the heat insulating element IS1 is also inserted. There is thus a multilayered thermal insulation material system between the interior of the washing container SB and the interior of the filling reservoir WT1.

As a whole, this thermal insulation material system preferably has a heat transfer resistance R _T of at least 0.02 (Km ² ) / W, in particular between 0.1 (Km ² ) / W and 1 (Km ² ) / W. As a result, a sufficient thermal barrier or brake is provided for the heat energy introduced into the interior of the washing container during a partial washing cycle, ie it remains in the interior of the washing machine for the duration of the partial washing cycle such that a profile of the washing process required for this partial washing cycle remains temporal temperature profile in the interior of the washing can be maintained. This profile preferably corresponds approximately to the temporal temperature profile of the same partial wash cycle in a conventionally designed dishwasher (without heat pump). On the other hand, the weak thermal coupling effect of the insulation material system is sufficient to cool the wall of the rinsing container at the outside of the filling reservoir, sufficient for a desired condensation drying relative to the air and / or the items to be washed in the rinsing when the filling reservoir previously at the Drying immediately immediately preceding Teilspülgang, such as rinse cycle, is cooled by the heat pump operation. This applies even more if the heat pump continues to operate during the drying cycle, ie is switched on.

For the energy balance of a rinse, it is preferably favorable if the filling reservoir is in thermal communication with the rinsing container, in particular if the interior of the rinsing container and the interior of the filling reservoir are thermally weakly coupled to one another by an insulating material system separating these from one another, and the liquid Total filling volume of the filling reservoir is selected such that the product of the thermal resistance Rth (unit: K / W) of the insulation material between the interior of the washing and the interior of the filling reservoir and the heat capacity Cth (unit: (W sec) / K) in the Füllreservoir stored amount of water a thermal time constant τ (unit: min (minutes)) between 5 min (minutes) and 60 min, especially between 10 min and 30 min for the transfer of heat from the washing results in the filling reservoir. The time constant τ indicates a simple measure or a reference variable for the time after which an amount of heat introduced into the rinsing container discharges itself via the thermal insulation material system into the filling reservoir (by heat transport). After the period of time τ, according to a first estimate, the difference between the temperature in the washing container and the temperature in the filling reservoir has fallen to about 37% of its initial value, which is present at the end of a heating-up period for a water-carrying partial washing cycle. This heat transfer behavior of the thermal insulation material system between the washing container and a filling reservoir attached to the outside thereof illustrates the 10 , The initial temperature difference ΔT ₀ between the temperature in the purge vessel and the temperature in the charge reservoir decreases approximately according to the exponential function ΔT = ΔT ₀ e ^{(-t / τ)} . At the time τ, only a fraction of 36.8% of the original temperature difference ΔT _{0 is} present.

The container of the filling reservoir WT1 is formed as a hollow body flat box or cuboid. This can be made in particular of plastic. It preferably has a capacity or maximum filling volume between 2 l and 10 l. The level assigned to its maximum filling volume is in the 1 dash-dotted line and marked VO. The filling reservoir covers at least 50%, in particular between 70% and 100%, of the total area of its associated wall SW1, here in the embodiment of 1 prefers the outside of the total area of its associated wall SW1 substantially. The heat-insulating element IS1 expediently covers at least approximately the same outer surface of the side wall SW1 of the washing container provided with the lining layer BI. In the front view of 1 In the lower region of the side wall SW1 of the washing container, a water inlet, ie an inlet opening WIL1 for fresh water, is provided from the filling reservoir WT1. There, a cut-free in the filling reservoir WT1 is expediently provided. In the embodiment of 1 the filling reservoir WT1 depends above this water inlet WIL1 and extends approximately to the ceiling wall DW of the washing container.

To the inlet IL1 of the filling reservoir WT1 a fresh water supply ZLV is connected. The water inlet IL1 is preferably provided in the lower region, in particular in the region of the bottom of the filling reservoir. The supply device ZLV comprises a device-side supply line WL11, which can be connected in particular to a water tap WH of a domestic fresh water network WH. In the supply line WL11, an inlet valve ZV or another passage control means is provided with which the inlet or the supply of fresh water FW * from the fresh water network WH into the dishwasher GS can be regulated. In particular, a free flow path FF can be provided in the supply line WL11, which reliably prevents a sucking back of rinsing liquid from the rinsing container into the fresh water network. Alternatively, the inlet valve ZV may be provided in or in the region of the inlet opening IL1 of the filling reservoir. When the inlet valve ZV is open, fresh water FW * passes over the Supply line WL11 for its descaling or softening in a water softening system EV. From there it flows via a feed line WL12 to the inlet IL1 of the filling reservoir or filling container and into it.

The filling reservoir WT1 has an outlet OF1, to which a discharge device ALV is connected. The water outlet OF1 is preferably provided in the upper region of the filling reservoir WT1. Its lower edge or its lower edge is approximately at the same level or at the same height as the desired fill level or above the desired fill level VO, which is reached by the fresh water at a full filling of the provided in the filling reservoir target filling volume. In the exemplary embodiment, the discharge device ALV here has a discharge line WL21 which connects the outlet OF1 of the filling reservoir WT1 to the water inlet WIL1 of the washing container SB1.

A heat pump WP1 is provided, the evaporator VD1 of which is thermally coupled to the filling reservoir WT1 for removing heat from the fresh water FW temporarily stored there, and the condenser VF1 of which supplies heat to the interior of the washing compartment SB. The heat pump WP1 in this case comprises a circulation line system LS for a fluidic refrigerant. Viewed in the flow direction SR of the refrigerant after the evaporator VD1 and before the condenser VF1, a compressor or other pressure generating means KP is provided in the circulation line LS. In front of the evaporator VD1, pressure reducing agents DM, e.g. an expansion valve and / or a capillary tube, for relaxing the refrigerant present in the circulation line LS.

The condenser VF1 is preferably laid in the region of the bottom BW in the interior of the washing container, in particular in the pump sump PS. If the rinsing container has been filled with i = VG, RG, ZG, KG with the rinsing-bath quantity WMi required for the respective partial rinsing cycle, the liquefier VF1 is preferably in the water or the respective rinsing-bath quantity, so that a favorable heat transfer from the condenser to the rinsing-bath quantity is ensured.

The evaporator VD1 lies in particular within the filling space of the filling reservoir provided for filling with liquid fresh water FW, ie it dips into the fresh water FW stored in the filling container. The tubes of the evaporator VD1 preferably extend over substantially the entire width and height of the area of the side wall SW1 bounded by the filling reservoir. This is in the 11 illustrated, the filling reservoir WT1 in a side view, that is viewed from the side when viewed perpendicular to the side wall SW1. The evaporator VD1 withdraws the amount of fresh water filled in the filling reservoir WT1 heat energy QP1. This may include the sensible heat and / or latent heat of the amount of fresh water stored in the hopper.

The filling reservoir WT1 is designed as an open water reservoir and not as a closed water storage tank. The open water tank is characterized in particular by filling it with one or more rinses of preferably descaled fresh water FW * of the inlet temperature TWT * via the fresh water supply device ZLV, and of one or more times requesting one or more rinses for the particular rinse cycle to be performed Fresh water amount FW taken and is fed via the discharge device ALV the rinse tank SB for use there for the respective partial rinse cycle to be performed.

It may be particularly advantageous if the filling reservoir as here in the embodiment of 1 is designed as overflow memory. Thus, if new, decalcified fresh water FW * is supplied to the filling reservoir WT1 through its lower inlet opening IL1 via the fresh water supply device ZLV, the water level of the mixed water, which is formed from the quantity of water already present in the filling reservoir and the newly supplied fresh water quantity, rises above the lower edge the upper outlet opening OF1, so that water by itself from the upper outlet opening OF1 via the discharge line WL21 of the discharge device ALV runs into the washing container SB. It thus comes to a "overflow" of the filling reservoir by the running into the filling reservoir amount of fresh water pushes out a corresponding, ie about the same amount of mixed water from the filling reservoir via the upper outlet opening OF1. In this case, a pump or a valve in the discharge device ALV for removing water from the filling reservoir is not required. In addition, the intended filling volume of the filling reservoir always remains completely filled with water during the entire rinse cycle. As a result, the filling reservoir WT1 is viewed over the total duration of the entire wash cycle SG in each water-carrying partial wash cycle such as VG, RG, ZG, KG and / or during the final drying cycle TG with its entire intended storage volume either as fresh water filling agent for the washing , as a heat reservoir for the heat pump, as collecting or collecting means of heat loss from the washing, and / or possibly for flushing final drying cycle as a heat exchanger with cooling function for drying support ready, ie he is always fully functional.

Possibly. can the upper outlet opening OF1 and / or discharge line WL21 by otherwise trained overflow means be replaced, which in each case allow that by filling a certain amount of fresh water into the filling reservoir from this an adequate, ie equal amount of water is pushed out of the filling reservoir and runs into the washing.

Alternatively, a drain valve may possibly be provided in the discharge line WL21 or at the outlet, ie in the outlet opening OF1 of the filling reservoir. This drain valve is preferably openable or closable via a control line from the control device CO. To remove a certain amount of water ΔWMi with i = VG, RG, ZG, KG from the filling reservoir WT1 this drain valve is opened by means of a control signal via the control line, otherwise it remains closed. (This embodiment is the diagrammatic clarity in the 1 has been omitted.) In particular, it may be expedient if the inlet valve EV and the outlet valve are simultaneously opened and closed by the control device CO via its control lines. This ensures that the filling reservoir WT1 considered over the entire rinse SG away always up to the intended level height VO, which corresponds to the maximum amount of liquid water provided filling volume in the filling reservoir is full.

For example, when first operating the dishwasher, the existing, intended for filling with liquid fresh water desired filling volume of the filling reservoir WT1 can be completely filled with fresh water through the water softener EV fresh water FW via the feeder ZLV. Before the rinse cycle of a dishwashing program to be carried out is started, in particular before the heat pump WP1 is put into operation for a partial rinse with rinsing liquid to be heated in the rinsing container, in general terms the nominal filling volume of the filling reservoir with softened fresh water FW * from the feeder is expediently provided for liquid fresh water ZLV filled up. In this case, the water level in the filling container WT1 reaches the setpoint filling level VO assigned to the set filling volume for liquid water. The desired filling volume preferably corresponds substantially to the entire inner volume of the filling reservoir, which is bounded by its container walls. Then the associated desired level level VO is approximately in the region of the top wall of the filling reservoir, i. when fully filled, the filling reservoir is filled with water from its bottom to the area of its ceiling. Advantageously, the filling reservoir WT1 extends on the outside of the possibly with a coating layer such. BI provided side wall such. SW1 of the washing container substantially from its lower end to its upper end.

It can be particularly favorable when the maximum setpoint level level VO is as in the exemplary embodiment of FIG 1 is advantageously set with a free space distance slightly below the upper edge of the filling reservoir WT1, so that a free space volume AR is present. This is suitably dimensioned so that it can absorb the increase in volume of water when ice formation. Above the maximum intended filling level VO an additional free space AR is thus provided in the filling container WT1, in which ice water / ice can expand, which during operation of the heat pump WP1 from the fresh water FW cached in the filling reservoir WT1 by the withdrawal of heat QP1 (sensitive and latent heat) is possibly generated by means of the evaporator VD1. Expressed in general terms, the filling reservoir in addition to the desired filling volume, which is provided for, preferably with an inlet temperature TWT * of about 15 ° C, entering the filling reservoir, softened, liquid fresh water FW *, expediently still a reserve or a void for the Volume increase by which the original volume of a given amount by weight of liquid water in the phase conversion to ice water / ice increases. This reserve of space can also be provided in a different way, for example, by the filling container having a flexible or elastic and thus flexible casing, which expands when the ice forms under the thrust force of the ice which becomes effective.

The dishwasher GS has a, in particular electronic, control device CO, which controls and / or regulates one or more components of the dishwasher for carrying out one or more dishwashing programs. It converts the various phases or partial program steps of a respective dishwasher program to be carried out into one or more water-conducting partial rinses and a final drying cycle of a rinse cycle. It may preferably be designed as a sequential control, which exercises control processes, if necessary, but can also perceive control operations.

Here in the embodiment of 1 is the control device CO in particular over (in the 1 dash-dotted line) signal or control lines and / or data lines with the following components in operative connection: The control device CO is connected to operate the inlet-side inlet valve ZV of the feeder ZLV with this via a signal line SL1. It can send one or more control signals to the inlet valve ZV via the signal line SL1 in order, in particular, to determine the chronological sequence of its opening and / or closing states. In addition, it controls and / or regulates the heat pump WP1, in particular its compressor KP at least one signal line SL2. It sends one or more control signals via the signal line SL2 in order to specify to the compressor preferably a chronological sequence of switch-on and switch-off states, and / or at least one other operating parameter such as the rotational speed of the compressor KP. Possibly. the control device CO may additionally or independently thereof via a in the 1 not drawn signal line commands to the pressure reducing DM transmit and so affect the temperature of the evaporator VD1. Furthermore, leads from the control device CO a signal line SL3 to the circulation pump UP to control by means of one or more control signals whose operation, in particular to specify the switch-on and switch-off of the circulating pump and / or to control the speed of the circulating pump and / or to regulate. Accordingly, the drain pump EP receives from the control device CO via a signal line SL4 for the control of their operation one or more control signals.

In addition, as in the embodiment of 1 - At least one detection means DV for detecting at least one parameter, which characterizes the respective heat energy content of the filling reservoir, be provided. As a parameter, in particular the temperature TWT can be used in the interior of the filling reservoir. A corresponding to the present temperature TWT measurement signal T can be transmitted from the detection means DV, here in particular by a temperature sensor, via a (dash-dotted line in the figure) measuring line or data line SL5 to the control device CO. With the aid of this parameter characterizing the heat energy content of the filling reservoir, the control device CO can preferably control, in particular control and / or regulate the work flow, in particular the switch-on and / or switch-off states of the heat pump WP1. Additionally or independently thereof, the control device can influence the thermodynamic processes in the filling reservoir and / or in the washing container in a targeted manner. Thus, it can - for example by sending a control signal via the signal line SL1 to the inlet valve ZV - specify which amount of fresh water for the respective water-bearing Teilspülgang removed from the filling reservoir and which fresh water amount to be refilled into the filling reservoir. In addition or independently of the temperature TWT of the fresh water quantity in the filling reservoir WT1, the temperature TSB in the rinsing container SB can serve as a parameter which characterizes the heat energy content of the filling reservoir - here indirectly - for characterizing the heat energy content of the filling reservoir. The temperature TSB can expediently be determined by means of a temperature sensor in the washing container and a corresponding measurement signal can be transmitted to the control device CO via a signal line.

The rinse cycle of a dishwasher program to be carried out preferably comprises one or more water-carrying partial rinses for rinsing the respective items to be washed in the rinse tank and a final drying cycle for drying the items previously wet in the one or more water-carrying rinse cycles. In at least one water-conducting partial rinse, heating of rinsing liquid in the rinsing container takes place to a required minimum temperature. In particular, the respective rinse cycle, such as SG, may comprise the water-conducting partial rinses pre-rinsing cycle VG, cleaning cycle RG, intermediate rinse cycle ZG and final rinse cycle KG following each other in chronological order (see 2 ). For the pre-wash cycle VG, it is preferred to use only, softened water as the rinsing liquid for charging the items to be cleaned in the rinsing container. For cleaning cycle RG, softened water mixed with cleaning agent is used as rinsing liquid in the rinsing tank. For the intermediate rinse ZG clean, softened water is sufficient as rinsing liquid in the rinsing container. For the rinse cycle KG softened water is mixed with rinse aid, ie with a relaxation agent to reduce the surface tension of the water and used in the washing container as a rinsing liquid. Possibly. One or more of these partial rinses such as the intermediate rinse ZG or pre-wash VG omitted or can be performed multiple times. During the respective water-conducting Teilspülgangs such as VG, RG, ZG, KG, the circulation pump UP is set by the control device CO by means of one or more control signals via the signal line SL3 at least temporarily in operation, so that each introduced into the washing rinsing liquid from the one or several spraying devices such as OS, US is sprayed in the interior of the washing container SB. During an end section of the respective water-conducting partial flushing cycle, the circulation pump UP is expediently deactivated by the control device CO and the drainage pump EP is activated by the control device CO. But it is also possible that the operation of the circulation pump UP and the operation of the drain pump EP overlap partially or completely in time.

For the cleaning cycle RG and the rinse KG the heating of the respectively introduced into the washing rinsing liquid is required in each case to a specific associated minimum temperature RT, KT, which makes it necessary to provide a sufficient amount of thermal energy by a heating medium. In this case, the heating of the rinsing liquid in the rinse cycle KG preferably also serves to the dishes and to heat the air in the interior of the washing container to the extent that in the subsequent rinsing final drying cycle on the dishes remaining water droplets evaporate by its own heat and are absorbed by the heated air in the washing, and that a sufficiently high difference between the temperatures of the respective wall of the Spülbehälters and after the rinse cycle moisture-laden air is effected so that moisture condenses from the air at the opposite of this and the washware cooler wall of the washing. In a conventional dishwasher, a water heater in the liquid circulation circuit of the washing container is usually put into operation for the respective heating process, which operates on the principle of electrical resistance heating.

For electrical energy saving, the heat pump WP1 is now provided as a heating means according to the principle of the invention. According to an advantageous variant embodiment, only the heat pump WP1 is provided as the heating means for heating rinsing liquid in the rinsing container. It serves to heat the rinsing liquid in the rinsing container during the cleaning cycle RG and during the rinse cycle KG of a wash cycle SG to be carried out by way of example. The 2 shows for this rinse SG temporally matching with each other over the time t (in sec) shown the temperature profile TSB in the rinse tank SB and the associated temperature profile TWT in the filling reservoir WT1, the switch-on / Ausschaltverlauf SKP of the compressor KP, the curve PV of the level Storage water FW in the filling reservoir WT1, the time course SWT1 the level of water in the filling reservoir WT1, the Spülflüssigkeitsmengen WMi with i = VG, RG, ZG, KG for the various Teilspülgänge VG, RG, ZG, KG in the washing, the switch-on / Ausschaltverlauf SEP of the drain pump EP, and the switch-on / Ausschaltverlauf SZV of the intake valve ZV. The switch-on state of the drain pump is denoted by E, whose switch-off state is indicated by A. Accordingly, the active operating state of the compressor KP of the heat pump is indicated by E and its turn-off state by A. The opening state of the intake valve ZV is symbolized by OP and its closed state by OF.

At the beginning, ie at the starting time tVS of the rinse cycle SG to be newly performed, the filling reservoir WT1 is filled to its maximum setpoint level VO with fresh water FW. For example, 6 l of water are present in it. This filling is expediently already made during the last water-conducting Teilspülgangs and / or drying cycle of chronologically preceding, previous rinse cycle. As a result, the residence time between the preceding rinse cycle and the subsequent rinse cycle SG to be carried out may be sufficient, in particular, for the fresh water FW stored in the filling reservoir to have been preheated to approximately room temperature UT, for example 23 ° C., at the location of the dishwasher by absorbing ambient heat. For the pre-rinse cycle VG, an initial purge rate in the rinse tank of water WMi with I = VG, such as between 2.0 l and 3.5 l, from the filling reservoir WT1 (eg with about 23 ° C ambient temperature UT) in the still empty at the start time tVS dishwasher container or rinse tank SB via the discharge device ALV taken, in particular drained. Immediately after this removal or preferably overlapping in time, in particular approximately at the same time, the filling reservoir is refilled with a replenishment amount of fresh water FW * from the supply device ZLV, which preferably corresponds to the amount of water WMi withdrawn from the filling reservoir by means of the discharge device ALV with i = VG , The amount of residual water reduced by the withdrawn amount of water WMi with i = VG, which is preheated to approximately ambient temperature UT, is thus immediately supplemented by a newly added amount of fresh water FW * with an inlet temperature TWT *, such as of about 15 ° C or renewed. If as here in the embodiment of 2 essentially at the same time, ie at the same time or synchronously with the withdrawal of a water quantity ΔWMi to be supplied to the first empty rinse tank with i = VG, eg of approximately 3.2 l, from the filling reservoir WT1 a corresponding, ie equal amount of fresh water FW * over the Feeding device ZLV is supplied to the filling reservoir, the total amount of fresh water in the filling reservoir remains approximately constant, ie, the filling amount of water FW in the filling reservoir has during the period P1 = tVE - tVS of the pre-wash VG an approximately constant target level level VO. For the supply of this Nachfüllmenge of fresh water FW * in the filling reservoir, the inlet valve ZV is opened by means of a sent from the control device CO via the signal line SL1 control signal for a filling phase, which in the bottom time chart SZV the 2 is indicated by a bar F1 from the time tVS, which marks the opening state OP of the inlet valve ZV for an initial filling sequence or filling period. The inlet temperature TWT * is usually lower than the ambient temperature UT and lower than the temperature TWT (> TWT *) of the already filled at the last, preceding rinse in the filling reservoir storage water, due to the conditions prevailing at the location of the dishwasher and domestic freshwater network WN, yes after a sufficiently long residence time in the filling reservoir has reached the ambient temperature. It turns one Mixing temperature, in the present example, for example, about 19 ° C, between the temperature TWT *, such as 15 ° C of the incoming via the feeder ZLV in the filling reservoir amount of fresh water FW * and at about ambient temperature UT = TWT residual amount of water lies in the filling reservoir. The temperature TWT of the fresh water quantity FW temporarily stored in the filling reservoir, which is composed of the residual amount of water already present in the filling reservoir before the start of the rinse cycle SG and the refilling amount of the fresh water FW * newly supplied to the filling reservoir, is thus at the beginning tVS and also during the pre-rinsing cycle VG to at its end time tVE slightly lower than the temperature TSB of the amount of water admitted into the washing tank WMi with i = VG. During the pre-rinsing VG, the filling reservoir WT1 is slightly heated by the ambient heat and by the waste heat from the rinsing tank SB. This period of time with a slightly rising portion of the temperature profile TWT in the interior of the filling reservoir WT1 is in the 2 designated P1. During the time period or phase P1 = tVE - tVS of the pre-rinse cycle, the circulation pump UP is at least temporarily, in particular with alternating switch-on and switch-off phases or continuously, by at least one control signal which is transmitted to it by the control device CO via the signal line SL3, is activated so that the rinsing liquid WMi present in the rinsing container SB is sprayed with i = VG via the one or more spraying devices OS, US of the liquid circulating circuit of the dishwasher into the interior of the rinsing container SB.

At the end of the pre-wash cycle VG, a subset, such as between 0.5 and 1 l, or the total amount, e.g. 3.2 l of the amount of water WMi present in the rinsing container for the pre-rinsing VG with i = VG is pumped out of the rinsing container, in particular into a house-side wastewater pipe, by means of at least one final pumping sequence E1 of the emptying pump EP brought to switch-off state A from switch-off state A to off. The drainage pump EP is brought to the switch-on state E by the control device CO by means of a control signal via the signal line SL4 from the off state A. According to this, the drain pump EP is brought back into its off state by means of a control signal via the signal line SL4 after the conclusion of the Abpumpsequenz E1 at time tVE. Thus, the pre-rinse VG is finished at the time tVE. During this final pumpdown phase E1 of the pre-wash cycle VG, during which the drainage pump EP is active, the circulation pump UP is expediently switched off by means of a control signal transmitted by the control device CO via the signal line SL3. Possibly. but can also be a time partially or completely overlapping operation of the circulation pump UP and the drain pump EP low.

This is followed by the cleaning cycle RG at the time tRS = tVE. For this a specific amount of water WMi with i = RG in the washing is required such. Example, between 3 l and 4 l, preferably about 3.5 l, to a desired target or target temperature, ie final temperature RT, in particular between 40 and 50 ° C, preferably from about 45 ° C, during an initial Heating-up period APR = tAE - tRS to be brought. A partial quantity of water ΔWMi with i = RG is taken from the filling reservoir WT1 by means of the discharge device ALV and fed to the rinsing container SB, so that there is a total amount of water WMi with i = RG desired for the cleaning cycle RG. In the exemplary embodiment, an approximately equal amount of fresh water FW * of the inlet temperature TWT * is preferably supplied to the filling reservoir WT1 by means of the feeding device ZLV at about the same time as this removal process. For this purpose, its inlet valve ZV is brought by the control device CO by means of a control signal via the signal line SL1 from the time tRS for an initial filling sequence duration in the open state OP, which in the 2 in the flowchart SZV is indicated by the bar F2. As a result, the water level in the filling reservoir remains approximately constant at VO (see diagram SWT1 in FIG 2 ), that is, intended for liquid water target filling volume in the filling reservoir is filled with water. After this refilling, a mixing temperature, here of about 18 ° C, for the mixed water in the filling reservoir, resulting from the newly supplied with the inlet temperature TWT *, here of about 15 ° C refill amount of fresh water FW * and in the filling reservoir WT1 after the removal of the partial amount of water ΔWMi with i = RG remaining, due to the absorption of ambient heat compared to the inlet temperature TWT * higher temperature TWT having - at best preheated to room temperature UT - residual amount of water composed.

Here in the exemplary embodiment, the compressor KP of the heat pump WP1 is advantageously switched on by the control device CO by means of a control signal via the signal line SL2, ie, taken into the switch-on operation E and for the start time tRS of the cleaning cycle RG, in particular at the end of the refilling process for the filling reservoir WT1 the time period tAE-tRS of the heating time portion APR operated, and brought back to the off state A at time tAE. During the period of time tAE-tRS of the heating-up time section APR, the heat pump WP1 is thus in active operation to move the rinsing liquid in the rinsing tank SB to the desired effective temperature or end temperature RT, in this case preferably between 40 and 45 ° C, preferably to about 45 ° C, heat. During this heating-up time section APR, the compressor KP can, according to a first advantageous embodiment variant, preferably be switched on permanently, ie continuously. According to a second advantageous embodiment variant, it may be favorable for regulating the temperatures at the evaporator VD1 and at the condenser VF1 of the heat pump WP1, when the compressor KP is switched by means of one or more control signals of the control device CO such that it is clocked during the heating-up time section APR having temporally alternating turn-off and turn-on time phases. In the 2 is shown in the state curve SKP of the compressor KP whose active operation is simplified by the constant on state E during the heating-up period APR.

During the cleaning cycle RG, the circulation pump UP is activated at least temporarily. For this purpose, the control device CO sends to the circulation pump UP one or more control signals via the signal line SL3. Only during an end portion of the cleaning cycle RG is the circulation pump UP expediently switched off and the drainage pump EP switched on for the partial or complete pumping out of the flushing container SB respectively present flushing liquid quantity. Possibly. but can also be a time partially or completely overlapping operation of the circulation pump UP and the drain pump EP low.

By means of this first operating phase of the heat pump WP1 during the heating-up period APR, heat energy QP1 is withdrawn from the fresh water FW stored in the filling reservoir WT1 by means of the evaporator VD1 and this together with the electrical energy expended for the compressor operation by means of the condenser VF1 as heat energy QP1 * in the washing container SB Due to the removal of heat by means of the evaporator VD1 when the heat pump WP1 is running, the water stored in the filling reservoir FW cools down because it removes sensible and / or latent heat 2 denoted by P2. Finally, the storage water FW in the filling reservoir can also freeze when the latent heat contained in it is completely removed. The filling reservoir thus forms an ice storage. Here in the embodiment of 2 is the storage water FW in the filling reservoir by the evaporator VD1 about from the time tF to a temperature TWT of about 0 ° C or even cooled below, so that ice water / ice is formed.

Particularly energy-efficient, ie saving electrical energy, it is when the heating process for the intended in the washing container for the cleaning cycle RG amount of water WMi i = RG to the required operating temperature RT alone, ie exclusively by means of the heat pump WP1 is effected. This case illustrates the embodiment of 2 ,

In order to achieve the respectively required end temperature RT within the predetermined heating time APR = tAE-tRS, it may be expedient if, in addition to the heat pump WP1, an electric heater, in particular water heating or air heating, is provided, supplementing by the control device CO to the heat pump WP1 for heating the interior of the washing container during the cleaning cycle RG, in particular the rinsing liquid quantity WMi introduced into the washing container for the cleaning cycle RG with i = RG, is put into operation at the required final temperature or effective temperature RT. In order to assist the heating of air and / or rinsing liquid in the rinsing container for the cleaning cycle RG to the desired final temperature or effective temperature RT, it can be particularly advantageous if the additional electrical heating is partially or completely parallel, i. is operated in overlapping time to the heat pump. The additional heating can be clocked in particular. Additionally or independently thereof, it may be appropriate if the additional heating by the control device CO after a heat-up period of the heat pump WP1, i. after their shutdown, is put into operation to reheat the already preheated by the heat pump rinsing liquid in the washing to the required final temperature RT in a separate phase. In both above advantageous embodiments, the additional heater can be dimensioned smaller in terms of their electrical power consumption and heat output as in the case of a conventional dishwasher, which has no heat pump but only a conventional water heater. This can bring a saving in electrical energy compared to a conventional dishwasher (without heat pump and conventional heating) despite the temporally simultaneous operation or despite the successive phases of operation of heat pump and conventional heating.

After the heating period or after the heating time APR of the cleaning cycle RG is in the embodiment of 2 the heat pump WP1 turned off when the interior of the washing container SB and, consequently, the rinsing liquid present there has reached the target temperature RT. After the time tAE, the compressor KP is brought into the off state A by a control signal, which is transmitted to it via the signal line SL2 from the control device CO. For the cleaning cycle RG, preferably a target or setpoint temperature RT of at least 40 ° C, in particular selected between 44 ° C and 50 ° C, so that the detergent added to the water can work properly for chemical removal of dirt on the items to be washed.

After this heating-up period APR with circulation operation of the circulation pump UP, it is continued during a post-wash phase P3 for a remaining time RZ = tRE-tAE of the cleaning cycle RG, so that the rinsing liquid heated with the aid of the heat pump can be conveyed via the one or more spraying devices, such as e.g. OS, US is sprayed in the interior of the washing container.

Alternatively, it is also possible for the circulation pump UP to be switched off during the heating-up period APR or operated at a reduced speed (compared to its operating speed for the spraying operation of the one or more spraying units). As a result, the amount of water present in the rinse tank SB is for the most part or completely at a collection point such as e.g. in the pump sump PS spatially limited before, and is not sprayed throughout the interior of the washing, which improves their heating to a desired final temperature RT compared to the case, in particular makes faster or more energy efficient that from the start time tRS of the cleaning cycle immediately the circulation pump UP with their provided operating speed and the rinsing liquid is sprayed through the one or more sprayers throughout the interior of the washing. Because of the heating in the washing container or its liquid circuit only locally existing amount of heat losses are reduced through the walls of the washing. Only after completion of the heating period, in this embodiment, the circulation pump for the Nachwaschphase P3 is turned on and operated with the operating speed required for the spraying of the spraying.

After the heating period APR with the first heat pump operation P2, in which the Spülflüssigkeitsmenge WMi with i = RG has been heated in the washing with the participation of the condenser VF1 of the heat pump WP1 to the desired final temperature RT, the compressor KP of the heat pump WP1 by one of the Control device via the signal line SL2 transmitted control signal off, ie taken out of service. It follows for the remaining period RZ = tRE - tAE the cleaning cycle RG a Nachwaschphase P3, in which the thus heated rinse liquid WMi with i = RG in the rinse tank SB by means of the switched circulation pump UP the one or more sprayers OS, US supplied and on this in the Interior of the washing container is sprayed. During this Nachwaschphase P3, the heat pump and / or other heating, especially water heating, off. This leads to a slow cooling of the rinsing liquid in the washing, because heat escapes from the washing, in particular on the walls such as SW1. In the 2 Therefore, the temperature TSB falls in the washing container, starting from the maximum occurring at the end time tAE of the heating RG cleaning temperature RT as here from about 45 ° C continuously to one of the lower temperature value, as here to about 30 ° C, at the end time tRE of Cleaning RG off.

The heat-insulating element IS1 between the covering layer applied externally to the side wall SW1 of the washing container, in particular bitumen layer BI and the wall WI1 of the filling reservoir WT1 facing the washing container, is expediently designed such that it acts as a thermal barrier or barrier or brake for the wall heat energy QP1 * introduced into the washing tank SB during the heating-up period APR by means of the condenser VF1 of the heat pump WP1. Generally speaking, between the interior of the washing container SB and the interior of the filling reservoir WT1 is defined by the wall, e.g. SW1 of the rinsing container, on the outside of the filling reservoir is mounted, by the outside of this wall of the rinse tank applied covering layer, in particular bitumen BI, by the resting on this covering layer heat insulating element IS1 and by the rinsing container facing wall of the container of the filling reservoir a multilayer, such weakly thermally coupling insulating material system formed between the interior of the washing and the interior of the filling reservoir, that during operation of the heat pump WP1 (relative to a desired heating period) more heat energy QP1 * in the washing tank SB can be pumped in total as heat energy QD by heat transfer from the washing Total lost.

On the other hand, this multilayer insulation material system or thermal insulation system nevertheless produces a weak thermal coupling between the interior of the washing container SB and the interior of the filling reservoir WT1 in such a way that loss heat QD, which is caused by the transport of heat from the interior of the washing container through the insulation material system, can be collected by the stored in the filling reservoir WT1 fresh water and pumped back by the heat pump WP1 at their renewed, in particular subsequent second startup again in the washing. It only leaves one time-delayed, ie throttled or reduced passage of heat from the washing back to the filling reservoir. The filling reservoir thus additionally serves as collecting or collecting means for waste heat QD, which escapes by heat transport via the respective wall, such as, for example, SW1 of the washing container SB, to which the filling reservoir WT1 is attached externally. It is thus advantageously allows a heat recovery by a heat circulation circuit, the filling reservoir as a heat source, the heat pump as a means of transport for the pumped out of the filling heat, the rinse tank as a heat sink, and the single or multi-layer insulation material system between the interior of the washing and the Interior of the filling reservoir as a thermal coupling means with retardation, ie braking function for the heat transfer from the interior of the washing container into the interior of the filling reservoir into it.

The greater the difference between the temperature TSB present in the washing container and the temperature TWT present in the filling reservoir, in particular at the end tAE of the heating-up period APR, the greater the heat discharge current QD through the insulating material system (viewed from the interior of the washing container to the outside into the filling reservoir) during the post-wash phase P3. The greater the difference between the temperature TWT of the filling reservoir present in the filling reservoir at the end of the heating-up period APR and that of the higher ambient temperature UT, the greater is the heat flow from the environment into the filling reservoir for its thermal recharging.

In the Nachwaschphase P3 of the cleaning cycle RG the Spülflüssigkeitsmenge is in the washing through the elimination of the heat pump WP1 so no heat energy QP1 * fed more, but from the previously pumped during the first phase P2 of the heat pump WP1 in the washing heat energy QP1 * escapes during the Nachwaschphase P3 a proportion of loss from the interior of the washing container SB through the insulation material system, (viewed from inside to outside) through the Spülbehälter sidewall SW1, the outside of this resting covering layer BI, the applied on the lining layer BI, thermally weak coupling heat insulating element IS1 and the Rinsing container facing, the heat-insulating element IS1 contacting wall WI1 of the filling reservoir WT1 is formed, into the storage water FW of the filling reservoir WT1. This heat flow QD, which penetrates from the interior of the filling reservoir WT1 the insulation material system, warms the storage water FW, which is in the filling reservoir previously during operation of the heat pump WP1 during the heating period APR strongly, in particular below 4 ° C, cooled. In particular, ice water / ice, which has possibly formed in the filling reservoir WT1 by the withdrawal of heat energy by means of the vaporizer VD1 in the course of the heating-up period APR during the heat pump operation, is thawed out; H. regenerated to liquid water.

In addition, the storage water FW in the filling reservoir WT1 after switching off the heat pump WP1 at the end of the heating time APR in particular also be warmed by ambient heat, since the then present temperature TWT of about 4 ° C or less of the storage water FW in the filling reservoir lower, preferably between 10 ° C and 20 ° C lower than the ambient temperature UT of usually about 23 ° C at the installation of the dishwasher such as in a kitchen. This temperature difference causes a heat flow QA from the environment into the filling reservoir. Here in the embodiment of 2 the storage water FW in the filling reservoir WT1 at the end tRE of the cleaning cycle RG preferably has a temperature of about 15 ° C-20 ° C, in particular about 19 ° C, on. In the embodiment of 2 starts the thawing of the ice water / ice from the time tA, which is here preferably about 1000 sec after the end tAE of the heating time APR.

Due to the fact that the temperature TWT of the storage water FW in the filling reservoir WT1 is always lower than the ambient temperature UT during the post-wash phase P3, little or no heat transport from the washing container to the environment takes place on the wall of the washing container to which the filling reservoir is externally attached. This is particularly advantageous because it can further reduce the electrical energy used per cycle.

Are in an analogous manner to the side wall SW1, which is externally equipped with the filling reservoir WT1, a plurality of walls of the Spülbehälters externally provided with one or more Füllreservoirs and - as the filling reservoir WT1 - each used as a thermal energy source by at least one evaporator heat pump at least one heat pump is removed, so starting from during the first heat pump operation such as P2 heated rinsing heat losses to the environment can be further reduced. It is particularly advantageous if each filling reservoir is operated as an ice storage, since then the sensible heat energy and latent heat energy removed by the respectively associated evaporator of at least one heat pump and for heating the interior of the washing container, in particular of treatment water or rinsing liquid in the interior of the Rinse container can be used.

Additionally or independently thereof, it may be for a regeneration, ie for heating the in the filling reservoir of the first heat pump operation at the heating time APR to a temperature TWT below 4 ° C, in particular cooled to about 0 ° C, or for melting or thawing of the filling in the reservoir the first heat pump operation at the heating time APR even frozen storage water FW be favorable if the control device CO opens the inlet valve ZV by means of a control signal via the control line AL1 and new fresh water from the domestic water network WN with an inlet temperature TWT *, in particular of about 15 ° C 20 ° C, run into the filling reservoir, as long as it is higher than the temperature TWT in the filling reservoir WT1. In order for the filling reservoir to be able to receive this fresh water FW *, which is newly supplied via the feeding device ZLV, it is expedient for the filling reservoir to be equipped with a correspondingly large filling volume or receiving volume. Advantageously, it may be during the Nachwaschphase P3 fresh water FW the inlet temperature TWT * repeatedly, ie in several feed phases, each with intermediate waiting phases supply the filling reservoir, especially as long as the temperature TWT of the liquid and / or frozen water in the filling reservoir WT1 lower than the inlet temperature TWT * (> TWT) is.

In the embodiment of 2 For example, the ice storage tank formed by the filling reservoir after the first heat pump operation P2 is preferably regenerated from the rinsing tank alone by the waste heat QP1 and possibly additionally by the ambient heat QA. Already thereby, the ice water / ice, which can be formed by the withdrawal of heat energy by means of the evaporator VD1 after the first heat pump operation in the filling reservoir WT1, thawed and brought to a temperature TWT, with a sufficiently high for a subsequent second heat pump operation heat energy content of Storage water corresponds. A regeneration of the filling reservoir by supplying fresh water does not take place here.

During an end section before the end time tRE of the cleaning cycle RG, the amount of liquid WMi present in the rinsing container SB is pumped off, preferably completely, in at least one pump-down sequence by means of the drainage pump EP. For this purpose, the control device CO transmits a control signal via the control line SL4 to the drain pump EP in order to initiate the pump-down sequence E2 (see time diagram SEP in FIG 2 ). Prior to the pumping sequence E2 or partially overlapping with it, the circulating pump UP is instructed by the control unit CO via the signal line SL3 to terminate its circulation operation, so that the spraying of flushing liquid is stopped via the one or more spraying units OS, US. As soon as the dirty cleaning liquid WMi with i = RG is pumped out of the rinsing container SB by means of the drainage pump EP at the time tRE, the inlet valve EZ is opened by the control device CO for a specific run-in period by means of a control signal via the signal line SL1 such that a desired amount of fresh water in the filling reservoir can flow in, which brings a correspondingly large amount of water ΔWMi with i = ZG from the filling reservoir to overflow or leakage through the outlet opening OF1 in the discharge line WL21 into it. About this, the previously emptied at the end of the cleaning cycle RG rinsing tank with a quantity of water WMi be filled with i = ZG, which is desired for the time subsequent to the cleaning cycle intermediate rinse ZG in the washing. In the exemplary embodiment, the amount of water ΔWMi supplied to the rinsing container from the filling reservoir WT1 is chosen to be between 2 l and 3 l with i = ZG. To terminate the filling process for the filling reservoir and thus because of the overflow character of the filling reservoir along with completing the filling process for the washing container, the inlet valve EV is closed again by the control device CO. This filling process is in the 2 indicated by the bar F3. The intermediate rinse ZG is provided for the fixed period of time between the times tRE (= tZS) and tZE. Meanwhile, the amount of water WMi with i = ZG is sprayed by means of the operating in circulation pump on the one or more sprayers in the interior of the washing. Preferably, the rinse tank SB is supplied with an amount of water between 2 l and 4 l, in particular about 2.5 l, from the filling reservoir. With this the intermediate rinse ZG is performed. If at the start time tRE = tZS of the intermediate rinse ZG fresh water FW * of the inlet temperature TWT * runs into the filling reservoir WT1 by opening the inlet valve ZV, so it cools in the embodiment of 2 the water present in the filling reservoir FW something, especially between 1 ° C and 5 ° C, since its inlet temperature TWT *, in particular from about 15 ° C to 18 ° C is less than the temperature TWT (> TWT *), in particular of about 19 ° C to 22 ° C, the existing in the filling reservoir at the end of the cleaning cycle RG storage water FW. The mixed water, which is generated by the inlet of fresh water FW * with the inlet temperature TWT * in the existing storage water FW of the temperature TWT, in the exemplary embodiment has a mixing temperature preferably of about 18 ° -21 ° C. With the progress of the intermediate rinse ZG it heats up slightly to the end time tZE with respect to its initial temperature at the start time tZS because it absorbs waste heat from the rinsing container and / or heat from the environment. Its temperature TWT is here in the embodiment from 2 to the end of the intermediate rinse, preferably between 20 ° C and 25 ° C.

During the period tZE-tZS of the intermediate rinsing cycle ZG, the heat pump WP1 is switched off, ie the rinsing liquid quantity WMi in the rinsing container with i = ZG is not actively heated. It takes during the period tZE-tZS the intermediate rinse only passively by heat transfer (without active heating) thermal heat energy in the previously heated at RG Rinse tanks wall, the previously heated during the cleaning cycle in the rinsing tank, and the previously heated during the cleaning cycle Washware is inserted. The temperature TSB in the interior of the washing container is preferably between 30 ° C. and 38 ° C. during the intermediate washing cycle ZG. At the end of the intermediate washing cycle, the control device CO sends an instruction for partial or complete emptying of the used washing liquid via the signal line SL4 to the emptying pump EP WMi with i = ZG from the washing container. The emptying process is in the diagram SEP the 2 illustrated by the bar E3. It is pumped a filling amount of here about 2.5 liters of water from the washing by means of the drain pump.

At the start time tKE of the rinse cycle KG following the intermediate rinse cycle ZG, an amount of water ΔWMi with i = KG is admitted from the filling reservoir WT1, which complements the desired amount of water WMi with i = KG in the rinsing container after the intermediate rinse ZG with partial pumping off. or completely supplies the desired desired amount of water, if as here in the embodiment of 2 the rinsing container was completely emptied at the end of the intermediate rinse ZG by means of the drainage pump EP. If the filling reservoir is preferably designed as an overflow reservoir, then the filling process for the washing container is triggered by supplying to the filling reservoir WT1 a fresh water quantity FW * which corresponds to the desired amount of water ΔWMi to be supplied to the washing container with i = KG. For this purpose, the inlet valve ZV is opened by a corresponding signaling via the signal line SL1 of the control device CO for a certain filling period and then closed again. As a result of the inflow of the fresh water FW * into the filling reservoir which is already full up to the level VO, its fill level rises above the lower edge of the outlet opening OF1, which is higher than the level VO in the upper region of the filling reservoir, so that water FW from the outlet OF1 of the filling reservoir overflows and flows into the washing compartment. In this case, the amount of water flowing into the rinsing container from the outlet opening OF1 of the filling reservoir via the discharge line WL21 and the inlet WI1L1 substantially corresponds to the amount of fresh water introduced into the filling reservoir. For heating the rinsing liquid quantity WMi with i = KG in the washing container to a required setpoint temperature KT, which is preferably higher than the target cleaning temperature RT, in particular at least 55 ° C, preferably as here about 60 ° C is selected, the heat pump WP1 from the start time tKS for a heating time APK, which extends to the end time tKE of the rinse cycle, taken by the control device CO in operation, ie turned on. This is caused by the control device CO by a control signal via the control line SL2 to the compressor KP of the heat pump WP1. The heat pump WP1 is therefore put into operation here a second time. This second heat pump operation is in the 2 designated P4. In the diagram SKP the 2 the switching on of the compressor KP is indicated by the change to the start time tKS of the rinse cycle KS from the "off" state A to the "on" state E. The compressor is in the embodiment of 2 During the second heat pump operation P4, the evaporator VD1 withdraws from the storage water FW in the filling reservoir sensible and / or latent heat QP1, which flows from the state of the rinsing cycle KG Compressor is pumped using electrical energy to the condenser VF1 and is discharged from there as heat energy QP1 * in the washing. It comes here in the embodiment during the active operation of the heat pump WP1 in the period tKE-tKS of the rinse KG from the time tF in particular for freezing, ie for ice formation of the storage water FW in the filling reservoir, as this by the evaporator VD1 below a temperature of 0 ° C. is cooled. In the exemplary embodiment, the heating of the rinsing liquid in the rinsing container to the desired setpoint temperature KT is achieved solely by means of the heat pump. Possibly. As explained above for the cleaning procedure, it may be expedient for a conventional water heater, which is designed as a resistance heater, to be switched on parallel to the heat pump in order to reach the target temperature KT within the specified heating-up period APK. In a modification of this, it may be expedient to actively heat the rinsing liquid in the rinsing container by means of the heat pump WP1 only during a first time segment of the heating-up period APK, then to switch it off and, for the remainder, ie the second time period, to wait until the conventional heating, in particular water heating, has taken place. turn. Finally, the clear rinse water brought to the desired set rinse temperature KT is pumped out of the rinse tank SB by means of the drain pump EP to the end tKE of the rinse cycle KG, which is shown in the diagram SEP of FIG 2 is shown simplified by a bar E4. One corresponding Abpumpsignal is transmitted to the drain pump EP via the control line SL4 of the control device.

At the end tKE of the final rinse cycle KG, the storage water FW in the filling reservoir is greatly cooled, in particular below 4 ° C., or, as in the exemplary embodiment, has preferably become ice water or frozen into solid ice. As a result, the filling reservoir is now ready as a cooling surface on the wall SW1 of the washing container, in the subsequent drying cycle TG, which lasts during the phase P5 from time tKE = tTS to tTE, the largest possible temperature difference, in particular of at least 10 ° C, preferably between 15 ° C. and 60 ° C. between the temperature TSB of the moist, warm air in the washing container and the temperature on the inner wall surface of the side wall SW1 of the washing container, on the outside of which the filling reservoir is arranged in contact with the heat-insulating element IS1 lying on the lining BI. The greater the difference between the temperature TWT in the filling reservoir and the temperature TSB in the washing container, the more effective condensation drying in the washing container is favored. For the thermal insulation element IS1, which is inserted between the coating layer BI applied on the side wall SW1 and the wall WI1 of the filling reservoir facing the washing container as intermediate material layer, is then traversed by an even larger heat flow QD. In particular, a temperature difference sufficiently large for a desired condensation drying can be maintained longer between the temperature TSB of the moist warm air in the purge tank and the temperature on the inner wall surface of the side wall SW1 of the purge tank during the predetermined time tTE-tTS of the drying cycle TG. Because the filling reservoir remains at about 0 ° C until all the ice has been thawed, because the supply QD of heat from the rinsing vessel to melt the ice, i. the phase transformation of ice into liquid water in the filling reservoir is consumed. In this way, the drying compared to a conventional dishwasher with a mounted outside on a side wall water tank (without heat pump coupling) is improved, which is filled to support the condensation drying in the washing only with fresh water of about 15 ° C inlet temperature from a domestic water pipe.

A further improvement in the drying can result, in particular, from the fact that the heat pump WP1 is operated further during the total time duration tTE-tTS of the final-rinse drying cycle TG subsequent to the final-rinse cycle KG. This is in the 2 characterized by the phase P5. By means of the evaporator VD1 of the heat pump WP1 actively operated cooling of the storage water FW in the filling reservoir WT1 this longer, especially over the entire period of the drying cycle TG away, at a low temperature, in particular at 0 ° C or below, be kept cool and at the same time by means of the condenser VF1, the air in the washing container is heated and dried so that the difference between the temperature of the inner wall surface of the side wall SW1 and the temperature TWT of the warm moist air and the items to be washed in the washing container over a longer period of time, in particular over the total duration of the drying cycle sufficient condensation drying is sufficient. In particular, by means of the switched-in heat pump, a temperature difference of at least 10 °, preferably between 15 ° and 60 ° C., between the temperature of the inner wall surface of the side wall SW1 and the temperature TWT of the moist, warm air and of the washware in the washing container can always be provided over the entire duration of the drying cycle , Since the air running through the drying cycle TG operation of the heat pump WP1 by means of the condenser or condenser VF1 in the interior of the washing container there is additionally heated, this can absorb moisture from the dishes better, so that an improved drying of the dishes is effected. In particular, it may be sufficient if the heat pump is actively operated only for an initial period of the drying cycle.

3 shows an advantageous modification of the dishwasher of 1 , Analogously to the equipping of the first side wall SW1 with the first filling reservoir WT1 designed as an overflow store, the second side wall SW2 of the washing container SB, which is opposite the first side wall SW1, is now additionally equipped with a second filling reservoir WT2 as an overflow store in a corresponding manner. Externally on the second side wall SW2 is applied a covering layer, in particular bitumen layer BI for Entdröhnung. In contact with the surface is a thermal insulation element IS2 which, in particular with regard to its material parameters, corresponds to the first heat insulation element IS1. The second filling reservoir WT2 is externally placed on the covering layer BI in a contacting surface. Possibly. For example, the ceiling wall and / or the bottom wall BW of the washing container may also be provided with a lining layer BI for deadening on the outside and with an additional thermal insulation layer IS3 on the outside. As a result, the interior of the washing container is improved thermally insulated, so that unwanted heat losses are largely avoided. In the interior of the second filling reservoir WT2 also an evaporator VD2 is housed. When filling the second filling reservoir WT2 with water, it is preferably completely immersed in the water. The inlet IL2 of the second filling reservoir WT2 can preferably be connected to the input side with its own fresh water supply device in an analogous manner as the first filling reservoir. The evaporator VD2 may preferably be a component of a second heat pump, which is designed analogously to the first heat pump WP1. In this case, therefore, identical filling reservoirs are provided on the two side walls of the washing container, each with its own fresh water supply device and water discharge device as well as separately assigned and coupled heat pumps. This corresponds to a duplication of the Füllreservoir- / heat pump assembly WT1 / WP1 associated with fresh water supply ZLV and water discharge device ALV of 1 ,

In an advantageous modification thereof is to save components here in the embodiment of 3 the overflow OF1 of the first filling reservoir WT1 is connected to the inlet IL2 of the second filling reservoir WT2 via a liquid connecting line VL12, so that the filling of the second filling reservoir WT2 with fresh water parallel to the filling of the first filling reservoir WT1 is accompanied by fresh water FW * by means of the inlet valve ZV. The rinsing container SB is filled with i = VG, RG, ZG, KG via the discharge line WL22 which is connected to the overflow OF2 of the second filling reservoir WT2 and leads to the inlet WIL2 of the rinsing container SB with a liquid quantity ΔWMi required for the respective water-conducting partial rinse cycle. In particular, it may be expedient if the second evaporator VD2 is part of the heat pump WP1 with the first evaporator VD1. Thus, the first evaporator VD1 may be formed, for example, by a first section and the second evaporator VD2, for example by a second section of a common evaporator one and the same heat pump cycle.

Possibly. It can be advantageous if a second water storage tank WT2 * is attached to the outside on the second side wall SW2 of the washing container SB, which is opposite the first side wall SW1 of the washing container SB equipped with the filling reservoir or filling container WT1. The second filling container WT2 * covers the second side wall SW2 expediently as large as possible. At this second filling reservoir WT2 * no heat pump is coupled, ie it is without evaporator coupling. Its inlet IL2 * is liquid-conductively connected via a connecting line VL12 * to the outlet OF1 of the first filling reservoir WT1, ie connected in fluidic series. This opposite the 1 modified construction of an inventively designed dishwasher is in the 4 shown schematically in a front view of the washing. The second water storage tank WT2 * is here in thermal contact directly on the outer lining layer, in particular bitumen layer BI of the second side wall SW2. In contrast to the first side wall SW1, therefore, no thermal insulation element such as IS1 is provided between the water storage tank WT2 * and the lining layer BI of the second side wall SW2. Deviating from the first filling reservoir WT1, the outlet OF2 of the second filling reservoir WT2 * is provided at its container bottom, ie the second filling reservoir WT2 * is not operated as an overflow store like the first filling reservoir WT1, but as an outlet store. For this purpose, a valve AVE is provided at the outlet OF2 or in the liquid line WL22 * leading from this to the inlet WIL2 of the washing container. This can be opened and closed by the control device CO via a control line SL6. During the water-carrying Teilspülgänge VG, RG, ZG, KG of the wash cycle SG, the drain valve AVE is switched to "open", so that the second filling reservoir WT2 * no inflowing water stores, but it leaves the first filling reservoir WT1 via the connecting line VL12 * tapered Simply run the water FW into the rinse tank SB. By contrast, the drain valve AVE is closed and the second filling reservoir WT2 * is filled with water from the first filling reservoir WT1, in particular completely, for the final wash cycle TG. If the first filling reservoir WT1 as in the embodiment of 1 and here in the embodiment of 4 is designed as an overflow storage, to the inlet valve ZV is opened in the fresh water supply line WL11, so that water from the full first filling reservoir WT1 is pressed into the overflow opening OF1 and flows via the connecting line VL12 * in the second filling reservoir WT2 *. Since the first filling reservoir WT1 contains one or more sub-rinses preceding the drying cycle TG, such as the rinse cycle KG, with heat pump operation deeply cooled water or ice water / solid ice, the supplied fresh water is cooled down from its inlet temperature, for example of typically 15 ° C. The effluent from the overflow OF1 of the first filling reservoir water thus has a temperature which is significantly lower than the inlet temperature TWT * of the incoming fresh water FW *. Thus, the second filling reservoir WT2 * contains cold water, in particular cooled down to 0 ° C-10 ° C. Since it rests contacting without heat element directly outside on the lining layer BI of the second side wall SW2, it provides a particularly effective cooling for the side wall SW2, so that the desired condensation drying in the rinsing container is better supported than in the first embodiment of 1 , The timing diagrams of 5 explain the associated, opposite the 2 changed sequence of the wash cycle SG of a dishwashing program. The function and mode of action as well as filling of the first filling reservoir WT1 correspond to those of the exemplary embodiment of FIG 1 , The timing diagram SWT1 corresponds to that of 2 and shows the time course PV of the fill level of the storage water FW in the first filling reservoir WT1. The level is constant over the total duration of the wash cycle SG at VO. In the 5 the time chart SWT2 * illustrates the time course of the filling state of the second filling reservoir WT2 * of FIG 4 , This is empty during the water-carrying partial rinses pre-rinse VG, RG cleaning, intermediate rinsing ZG and rinsing KG and during the drying cycle TG completely filled up to the maximum level level VO *. The diagram SVE illustrates the timing of the switching states of the drain valve AVE. It is open during the partial flushing cycles VG, RG, ZG, KG, ie in the "up" ON state, while it is in its closed state OF during the drying cycle TG. The diagram SSB corresponds to the diagram WMi of 2 and is used for orientation, which amounts of liquid in the course of the wash cycle SG are present in the washing or pumped. Finally, the SZV diagram illustrates the open states OP and closed states of the fresh water intake valve ZV. In contrast to 2 the inlet valve ZV is now also open when changing from the final rinse cycle KG to the drying cycle TG for a filling phase F5 in order to fill the second filling reservoir WT2 with cooled water from the first filling reservoir WT1. It may be favorable - in accordance with the above explanations of the embodiment of 1 and 2 Be, if the heat pump WP1 is actively switched during the drying cycle TG, so that an active cooling of the storage water in the first filling reservoir takes place by the local evaporator VD1.

6 shows a further advantageous modification of an inventively designed dishwasher. In contrast to 1 Now the condenser VF1 of the heat pump WP1 is housed in the outlet pipe or pressure pipe WL4 of the circulation pump UP (viewed in the flow direction of the pumped or circulated water). Preferably, it is inserted in a connecting pipe between the circulation pump UP and the water switch WS. Possibly. it is also possible to accommodate the condenser VF1 in the circulation pump UP itself and thus form this as a heating pump.

In an advantageous modification to 1 are in the embodiment of 7 one or more condenser sections such as VF11, VF12, VF13 heat pump WP1 at the bottom of the bottom BW of the washing container heat-conducting attached. This variant is advantageous if the heat pump WP1 is actively operated during the drying cycle, since then the air in the rinsing container can be additionally heated by the condenser or condenser.

8th illustrates a further advantageous modification of the dishwasher of 1 , The condenser VF1 of the heat pump WP1 is now housed in a dedicated air duct LK. The air channel LK connects an air outlet LA of the washing container with an air inlet LE of the washing container. It is arranged outside the washing compartment SB and extends predominantly on the second side wall SW2 of the washing compartment opposite the filling reservoir WT1. Advantageously, the air outlet LA can be provided in the middle or even better upper region of the side wall SW2. The air inlet LE is provided, for example, in the region of the bottom BW of the washing container SB. In the air duct LK a fan or a fan FA is housed. With its help, a forced air flow LS can be generated from the air outlet LA in the direction of the air inlet LE. Viewed in the air flow direction LS, the condenser VF1 is preferably arranged downstream of the blower FA in the air duct LK. In the phase such as RG or KG a rinse cycle, during which by means of the condenser VF1 during operation of the heat pump WP1 respectively introduced into the washing rinsing liquid to be heated, the fan FA is turned on via a control line SL7 of the control device CO. By thus flowing past the condenser VF1 air, which is sucked through the fan from the interior of the washing through the air outlet LA and is then blown on the condenser VF1 then back to the air inlet LE back into the washing after the blower, the air in the interior of the Rinse tank and thus the respective amount of rinsing liquid also be heated effectively. This variant is advantageous if the heat pump WP1 is actively operated during the drying cycle, since then the air in the rinsing container can be additionally heated by the condenser or condenser.

For the most effective removal of heat from the storage water of the filling reservoir WT1, it may be particularly advantageous if the flow of the coolant produced by the compressor KP during operation of the heat pump WP1 a direction component against a directional component of the natural or forced convection ZS of the storage water FW in the filling reservoir WT1 has. In the 9 A forced flow ZS is impressed on the storage water FW in the filling reservoir WT1 by a pump or a rotating impeller ZP. The circulation pump ZP can via a in the 9 dash-dotted lines indicated control line SL8 controlled by the control device CO and / or regulated. It is preferably sucked or pumped out of the filling reservoir via a circulation line ZL water at the upper end of the filling reservoir WT1 through a first opening O1 and at the lower end of the filling reservoir WT1 through a second opening O2 in the filling reservoir again pumped into this. Preferably, the two openings O1, O2 are inclined, in particular approximately diagonally opposite (see 11 ). Then arises in the filling reservoir a water flow ZS with a component in the vertical direction from bottom to top. If the evaporator VD1 has, for example, line sections in the vertical direction and the coolant flowing in it flows in the direction of gravity, ie from top to bottom, the flow direction SR of the coolant in the evaporator VD1 runs counter to the vertical direction component of the water flow ZS forced in the filling reservoir by means of the pump ZP , As a result, the heat transfer from the storage water FW to the refrigerant in the evaporator VD1 is enabled with high efficiency. For such a heat exchange, in general terms "heat exchange in countercurrent principle", is particularly suitable a tubular plate evaporator with vertical pipe guide, as exemplified in the schematic front view of 9 is shown. Of course, other water moving means, in particular flow generating means are possible.

In particular, it is expedient to provide the fresh water inlet IL1 there in the wall of the filling reservoir WT1, where the formation of ice on the evaporator VD1 starts the latest during heat pump operation. The inlet IL1 is thus provided as far away as possible from the section of the evaporator VD1 into which the refrigerant of the heat pump (in the flow direction SR of the refrigerant in the circulation of the heat pump) WP1 enters. A corresponding arrangement may also be expedient for the outlet OF1 of the filling reservoir. This undesirable clogging or clogging of the fresh water inlet IL1 and / or outlet OF1 with ice is largely avoided, so that even after the respective heat pump operation still fresh water FW * flow into the filling reservoir and / or from this into the discharge line WL21, the Rinsing tank leads, can flow into it. In the embodiment of 9 the fresh water inlet IL1 is provided in the lower region of the filling reservoir WT1. During the heat pump operation, the water freezes from the top, because yes, the refrigerant is injected into the evaporator VD1 from above through the pressure reducing agent DM, in particular expansion valve or capillary tube into the evaporator coils and there the evaporator is the coldest. By the flow of this upper portion of the evaporator VD1 with warmer storage water and / or fresh water from below the ice formation can be delayed at the upper portion of the evaporator. Therefore, as here in the embodiment of 9 the outlet OF1 remain arranged in the upper region of the filling reservoir. It can be ensured a more uniform cooling of the total amount of storage water in the filling reservoir. This leads to a better utilization of the thermal heat contained in the storage water, through the heat pump, so that their COP is improved.

In particular, it may additionally or independently be expedient for this purpose if the water inlet IL1 of the filling reservoir WT1 is provided in the lower region, in particular at the bottom of the filling reservoir, the water outlet OF1 in the upper region of the filling reservoir, in particular obliquely, preferably approximately diagonally offset from the water inlet IL1 , By the inflow of this upper portion of the evaporator VD1 with incoming fresh water FW * the inlet temperature TWT * from the bottom, the ice formation at the upper portion of the evaporator VD1, in which the refrigerant of the heat pump's circuit first arrives, delayed and / or the water inlet IL1 longer be kept free of ice. This can increase the efficiency of the heat pump WP1.

Expressed in general terms, the sensible and latent heat contained in the storage water FW of the filling reservoir WT1 can be better removed by the evaporator by forcing the storage water FW in the filling reservoir WT1 to move, in particular in the vicinity of the evaporator coils. For this purpose, various flow generating means are providable. This can be, for example, a rotating impeller in the filling reservoir or simply incoming fresh water FW *. If fresh water FW * is filled into the filling reservoir by means of the supply valve ZV, a diagonal direction KR of the water flow from a lower corner region of the filling reservoir, in which the inlet IL1 is provided in the wall of the filling reservoir, arrives at an obliquely opposite upper corner region which is provided in the wall of the filling reservoir of the outlet OF1. By adding fresh water FW *, the early formation of ice on the vaporizer VD1 can thus also be delayed. This illustrates the 11 based on a side view of the filling reservoir WT1. In it, the vaporizer VD1 in a modification to 9 designed as a tube-plate evaporator with horizontal pipe run. By means of the circulation circuit ZL equipped with the circulating pump ZP, the storage water FW can be forced to a water flow with an approximately diagonal flow direction KR, for example from the left lower inlet O2 eg to the right upper outlet O1 if required. Rotates 90 ° to the fresh water FW * can flow into the filling reservoir by opening the inlet valve ZV through the inlet opening IL1 in the lower right corner and storage water leaving the filling reservoir through the outlet opening OF1 in the upper left corner, thus also a water flow in the diagonal direction KR is produced. Both the water flow ZS and the water flow KR each have a directional component, which is opposite to the flow direction SR of the coolant in the horizontal evaporator sections. By this countercurrent principle, the efficiency of the evaporator and thus the COP of the heat pump can be improved. A forced flow in the filling reservoir is preferably generated when - for example, due to the density anomaly of water at about 4 ° C - comes to a standstill of free convection in the filling reservoir.

Generally speaking, it is particularly advantageous if the fresh water inlet, such as the fresh water inlet, e.g. IL1 of the filling reservoir, such as e.g. WT1 (and / or also its water outlet, such as OF1) is provided at a location in its container wall which is as far as possible from the point of entry of the refrigerant into the evaporator, e.g. VD1 lies. Thereby, the fresh water inlet (and / or water outlet) may be removed during operation of the heat pump such as e.g. WP1 be kept largely free of ice. A supply of fresh water into the filling reservoir such as e.g. for a subsequent partial rinsing is therefore possible even after the end of the heat pump operation without long waiting, as would otherwise be required for thawing an inlet occlusive ice mass. In addition, the evaporator, such as e.g. VD1 from the ice-free inlet opening IL1 be flown with fresh water FW *, which has a higher inlet temperature TWT * than the temperature of the evaporator. Thus, by supplying fresh water TWT * one or more times through the inlet such as e.g. IL1 into the filling reservoir such as e.g. WT1 be thawed into the storage water in the region around the evaporator or there early icing can be avoided. The total amount of storage water in the filling reservoir can thus be cooled more homogeneously by means of the evaporator, so that the COP of the heat pump is improved.

It may be expedient in particular if at least one detection means DV (see the US Pat 1 ), such as a temperature sensor, for detecting at least one parameter, such as the temperature TWT, which characterizes the respective heat energy content of the filling reservoir WT1, is provided. The control device CO can then with the help of this parameter the workflow, in particular the switch-on and / or switch-off, the heat pump WP1, and / or other component of the filling reservoir WT1, such as the circulation pump ZP in the circulation ZV of the filling reservoir WT1, the fresh water -Zuführvorrichtung ZLV and / or the discharge device ALV control, in particular control and / or regulate.

To increase the thermal heat storage of the filling reservoir, it may be appropriate if the sewer WL6, pumped via the drain pump EP used rinse water from the washing and in a home-side (in the 1 omitted) wastewater pipe dissipates, is passed through a partial section through the filling reservoir WT1 or brought into thermal contact with this in any other way. As a result, the residual heat contained in the pumped, used rinsing water can be transferred to the storage water FW in the filling reservoir WT1 and thus be thermally charged. This also improves the electrical energy balance of the dishwasher. In the 1 This training variant has been omitted for the sake of clarity of drawing.

It may be favorable if at least one PCM element or component PE is housed inside the filling volume of the filling reservoir WT1, the phase change temperature of which is expediently higher than that of water and lower than the ambient temperature, in particular between 3 ° C. and 10 ° C., is selected. In the 1 such a PCM element PE is shown in dash-dot lines in the filling reservoir WT1. It lies against the inside of the washing reservoir SB facing wall WI of the filling reservoir WT1. The PCM element is at full filling of the filling reservoir with water surrounded by this preferably all around. As a result, the heat storage capacity of the filling reservoir can be increased in a particularly favorable manner. In particular, paraffins may be chosen as the PCM material. It is expediently enclosed in an all-round tight envelope, so that it can not leak when its phase change temperature is exceeded, ie in the liquid state.

In particular, it may already be sufficient if the filling reservoir WT1 has at least one thermal insulation layer or layer, in particular made of PCM, on the outside and / or inside side only on its wall WI facing the rinsing container SB. At its other walls, a thermal insulation, in particular PCM material may be omitted. This saves insulation material and can be constructive and montageetechnisch favorable. It is thus provided in a simple manner between the interior of the washing and the interior of the filling reservoir, an inventive weak thermal coupling coupling insulation system. The separate thermal insulation element IS1 can then be omitted.

Furthermore, it may also be advantageous if the filling reservoir is provided with a complete envelope of PCM, ie all around the inside wall side and / or outside wall side with PCM ("phase change material") as insulating material whose phase change temperature is higher than that of the im Filling reservoir cached fresh water during heat pump operation is, in particular between 3 ° C and 10 ° C. Its phase change temperature is preferably lower than the temperature in the washing at the end of each heating period of each Teilspülgangs with aufzuheizender rinse liquid such as the cleaning cycle or rinse cycle, preferably lower than the ambient temperature selected, so that in him loss of heat from the washing as latent heat, especially ambient heat , can be stored. Conventional PCM materials have relatively poor heat-conducting properties, ie they have a thermally insulating effect. In this way, the filling reservoir can be thermally insulated internally and / or externally by PCM mounted on the inside wall and / or outside wall. Due to the fact that the phase change of the PCM takes place at a higher temperature level than the phase change of the water, the temperature of the wall of the filling reservoir at the outside of the filling reservoir facing away from the washing container remains approximately constant at the melting temperature of the phase change material during the period of time, due to the release of latent heat the heat pump is in operation and makes the fresh water in the filling reservoir to ice water and / or ice. When the heat pump is off, the PCM absorbs heat loss heat from the purge bin and / or heat from the environment and melts, causing it to be at least at a melting temperature higher than that of water in the fill reservoir. In a kitchen is usually expected at a temperature of about 15 ° C-24 ° C, so that the PCM material expediently has a melting temperature that is higher than that of ice water / ice and lower than the ambient temperature. Because of this reduction in the temperature gradient between the temperature of the ambient air and the temperature of the outer wall of the filling reservoir applied to the rinsing container compared with the case that the outer wall of the filling reservoir remote from the rinsing container without PCM, less water from the ambient air at the outside of the filling reservoir facing away from the rinsing tank condense. As a result, contamination or damage to the floor and / or adjacent kitchen furniture parts at the installation of the dishwasher are largely avoided.

If the fresh water in the filling reservoir after completion of the last heat pump operation such. when the rinse cycle is strongly cooled, in particular to less than 4 ° C, preferably below 0 ° C and ice water / solid ice, so then also cooled below its phase change temperature and solidified PCM delays the warming of the cold water or ice water / ice in the filling reservoir the loss of heat escaping from the rinsing tank in comparison to a filling reservoir without PCM during the rinsing final drying cycle.

In addition to or independently of the above advantageous embodiment, it may be expedient if a PCM material is used for the thermal insulation element IS1 between the washing container SB and the externally mounted filling reservoir WT1, i. Expressed in general terms, in this advantageous variant, at least one layer or layer of PCM is inserted between the wall of the filling reservoir facing the washing compartment and the wall of the washing compartment facing the filling reservoir. For the PCM, the melting temperature is advantageously selected to be higher than that of water and lower than the temperature in the washing container at the end of the heating time period of the respective partial washing cycle with the washing water to be heated. In particular, the phase change temperature of the PCM is selected to be lower than the ambient temperature in order to also be able to collect ambient heat. This is, as already explained above, favorable for the drying cycle, since the wall of the washing container to which the filling reservoir is attached can be kept sufficiently cool for a desired condensation of moisture from the moist-warm air in the washing container on it during the drying cycle. A thermal insulation, in particular a PCM jacket of the filling reservoir can then be omitted if necessary.

A particular advantage of the inventively designed dishwasher with the externally attached to the rinsing tank filling reservoir, which serves as a filling means for filling the rinsing container with a required for the respective water-carrying Teilspülgang Spülflüssigkeitsmenge and at the same time as a heat source for the heat pump is generally considered that the Outside temperature of the filling reservoir WT1 constantly, ie preferably during all partial rinses VG, RG, ZG, KG and the final drying cycle TG of the rinse is below the ambient temperature UT. This ensures that there at each respective with a filling reservoir such. WT1 equipped wall such. B. SW1 of the washing tub, a heat transfer from the interior of the washing container to the environment is largely avoided. In addition, it is advantageous that, in particular, thermal energy can also be used from the surroundings for partial heating of the filling reservoir WT1.

Advantageously, the filling reservoir such as WT1 is formed as an open memory, ie it fresh water FW taken over the discharge device such as ALV during the rinse SG at least once and it will be during this rinse at least once new fresh water such as FW * on the Feeding device such as ZLV supplied. Through this partial or complete water exchange or water change a contamination of the filling reservoir with microorganisms is largely avoided, as is otherwise possible in a closed, with water once fully filled heat storage tank. Even the risk of unpleasant odors is uncritical in an open storage. In addition, by the partial or complete water exchange or water change advantageously a thermal regeneration of the filling reservoir is possible. By one or more removal and supply of fresh water per wash, preferably by at least one extraction and at least one feed per water-conducting Teilspülgang, especially at the end of each water-conveying Teilspülgangs or in the transition phase of a water-carrying Teilspülgang the next water-carrying Teilspülgang a wash cycle is In addition, a flow dynamics or water movement in the filling reservoir is generated, that is forced convection, whereby it comes to a mixing of newly flowing from the feeder fresh water and the amount of water already existing in the filling reservoir. This results in a mixing temperature for this water mixture in the filling reservoir, which is between the inlet temperature TWT * of the fresh water FW * and the current temperature TWT existing in the filling water FW. If an operation of the heat pump for a desired heating time of a Teilspülgangs and thereby extracted by means of the evaporator containing in the filling water amount of heat energy, the amount of water is cooled in the filling reservoir and generated in particular for the use of latent heat energy stored in the water ice. If, according to a further embodiment variant, fresh water is admitted into the filling reservoir at least once during the period of heat extraction by means of the evaporator, the freezing of the amount of water present in the filling reservoir can be delayed, or if ice water / solid ice has already formed, this thawed , ie regenerated. By supplying fresh water so the filling reservoir can be recharged or refreshed with thermal energy. For this purpose, the filling reservoir expediently provides a corresponding refilling volume. For the removal of a certain desired amount of thermal heat energy by the heat pump can be made smaller by the supply of fresh water, the storage volume of the open filling reservoir for water than would be the case with a closed water tank. In addition, the water discharged from the filling reservoir is partly or wholly used as rinsing liquid in the rinsing container for the respective water-conducting partial rinse cycle of a rinse cycle to be carried out, so that stringent requirements for a maximum permitted water consumption per rinse cycle can be met.

In summary, a filling reservoir or heat exchanger is mounted on one or more side walls of the washing container of a dishwasher, which is filled with fresh water. Between the filling reservoir and the container wall, a thermal insulating layer is present, which allows a small amount of heat flow between the washing and the filling reservoir. The water of the filling reservoir is for use as a rinsing liquid during one or more Teilspülgänge a rinse cycle in the washing, on, in particular drained. At or in the filling reservoir of the evaporator of a heat pump is mounted, which pumps the heat energy from the storage water of the filling reservoir in the washing, in particular its Spülflüssigkeits circulation circuit. For this purpose, the condenser or condenser of the heat pump is expediently integrated into the water circulation of the washing liquor circulation of the dishwasher. Alternatively, the condenser of the heat pump may be attached to the bottom of the washing container. The condenser can be used for drying improvement, i. the heat pump can continue to operate during the drying cycle of a rinse cycle. When the heat pump is switched on during the drying cycle, the air in the rinsing container is expediently heated and dried by means of a condenser thermally coupled to the interior of the rinsing container. For this purpose, it may be advantageous if the condenser is integrated in an air circuit which is connected to the interior of the washing compartment. This arrangement can additionally be used in the drying phase for drying improvement.

An electrical energy saving per wash cycle is now possible because the filling reservoir, which is provided for filling the washing with fresh water inlet side, also serves as a heat source for a heat pump. In this case, the filling reservoir is advantageously formed as an open container to which each rinse cycle, in particular per water-conducting partial rinse, at least once fresh water is supplied and at least once water is removed to fill the rinse tank. Thus, in simplified terms, the filling reservoir is integrated into the rinsing cycle of a running dishwashing program, preferably by withdrawing water for filling the rinsing container with desired amounts of water for the water-carrying partial rinsing of a rinse cycle and through subsequent refills with fresh water. Due to the associated dynamic water exchange in the filling reservoir during a wash cycle, the risk of contamination of the filling reservoir is avoided. In addition, the thermal heat loss or Abstrahlergie from the washing, especially during the Nachwaschphase the cleaning cycle, be collected and stored in the filling reservoir.

• – Die Isolierung zwischen dem Füllreservoir und der ihm zugeordneten Spülbehälterwand wird als schaltbare Wärmedämmung ausgeführt, d.h. in der Trocknungsphase wird die Kondensationswärme bei leitend geschalteter Isolation gut abgeführt.
• – Im oder am Füllreservoir kann zusätzlich ein PCM (z.B. mit einer Schmelztemp. Bei ca. 3°C) vorgesehen sein, dessen Schmelztemperatur höher als die von Wasser ist, um die Speicherenergie im Füllreservoir zu erhöhen. Dadurch kann ggf. vermieden werden, dass das Wasser im Füllreservoir durchgefroren werden muss, um eine geforderte Menge an sensibler und latenter Wärme aus dem Füllreservoir entziehen zu können. Dabei kann das Füllreservoir vorzugsweise ständig mit Wasser gefüllt sein, d.h. auslaufendes Wasser wird sofort mit einlaufendem Wasser gefüllt. Eine Verbesserung des COP Wertes der Wärmepumpe ist dabei zu erwarten, da die Temperaturdeltas zwischen Kondensator bzw. Kondensor und Verdampfer geringer als bei einem geschlossenen Wassertank als Wärmespeicher sind.
• – Durch einen größeren Anteil der Aufheizenergie zugunsten der Wärmepumpe in den Aufheizphasen eines Spülgangs wird der Energievorteil größer gegenüber einer Geschirrspülmaschine mit einer konventionellen Wasserheizung. Der Anteil der Zusatzheizung (insbesondere Heizpumpe) an der pro Aufheizphase insgesamt bereitzustellenden thermischen Wärmemenge kann reduziert werden. Ggf. kann eine Zusatzheizung ganz entfallen und ausschließlich die Wärmepumpe zum Aufheizen der Spülflüssigkeit im Spülbehälter dienen.
• – In der Trocknungsphase kann die Wärmepumpe zusätzlich zur Trocknung benützt werden. Der Kondensator bzw. Verflüssiger z.B. angebracht am Behälterboden erwärmt den Innenraum, wodurch der Verdunstungsprozess von Flüssigkeit, insbesondere am Spülgut, im Spülbehälter gefördert wird. Die kalten Seitenwände des Spülbehälters, abgekühlt durch den Verdampfer fördern dabei den Kondensationsprozess.
• – Ein Flottenspeicher, in welchem das warme Wasser z.B. der Klarspülflotte nach Beendigung des Klarspülgangs gespeichert wird, kann beim Einsatz der Wärmepumpe in der Trocknungsphase zusätzlich als Energiespeicher für die Wärmepumpe benützt werden.
• – Mehrere Wände des Spülbehälters können mit dem Füllreservoir ausgestattet werden, an das der Verdampfer der Wärmepumpe thermisch angekoppelt ist. Dadurch ist ein höheres Energiepotential vorhanden und die Trocknung wird durch zusätzliche Kondensationsflächen erhöht. Der Energieverlust an die Umgebung durch konvektiven Wärmetransfer und durch Wärmestrahlung wird negativ, da die Wände eine Temperatur unterhalb der Umgebungstemperatur haben.
• – Der Abwasserschlauch der Geschirrspülmaschine kann vorteilhafter Weise durch das Füllreservoir hindurchgeführt sein. Dadurch wird das Speicherwasser im Füllreservoir zusätzlich durch aus den Spülbehälter mittels der Entleerungspumpe abgepumptes, noch warmes Abwasser erwärmt.

Additional potential for improvement can be made possible in particular by the following advantageous embodiments:

• - The insulation between the filling reservoir and its associated Spülbehälterwand is designed as a switchable thermal insulation, ie in the drying phase, the heat of condensation is discharged well at conductively switched insulation.
• In addition, a PCM (eg with a melt temp. At about 3 ° C.), whose melting temperature is higher than that of water, can be provided in or at the filling reservoir in order to increase the storage energy in the filling reservoir. This can possibly be avoided that the water in the filling reservoir must be frozen to be able to extract a required amount of sensible and latent heat from the filling reservoir can. In this case, the filling reservoir may preferably be constantly filled with water, ie leaking water is immediately filled with incoming water. An improvement in the COP value of the heat pump is to be expected, since the temperature deltas between the condenser or condenser and evaporator are less than in a closed water tank as a heat storage.
• - Due to a larger proportion of the heating energy in favor of the heat pump in the heating phases of a rinse, the energy advantage is greater compared to a dishwasher with a conventional water heater. The proportion of additional heating (in particular heating pump) to the total amount of thermal heat to be provided per heating phase can be reduced. Possibly. An auxiliary heater can be dispensed with completely and only the heat pump can be used to heat the rinsing liquid in the rinsing tank.
• - In the drying phase, the heat pump can be used in addition to drying. The condenser or condenser, for example, attached to the container bottom heats the interior, whereby the evaporation process of liquid, in particular the items to be washed, is conveyed in the washing container. The cold side walls of the washing container, cooled by the evaporator promote the condensation process.
• - A fleet storage, in which the warm water eg the rinse liquor is stored after completion of the rinse cycle, can also be used as energy storage for the heat pump when using the heat pump in the drying phase.
• - Several walls of the washing container can be equipped with the filling reservoir to which the evaporator of the heat pump is thermally coupled. As a result, a higher energy potential is present and the drying is increased by additional condensation surfaces. Energy loss to the environment through convective heat transfer and heat radiation will be negative as the walls are at a temperature below ambient.
• - The sewer hose of the dishwasher can be advantageously passed through the filling reservoir. As a result, the storage water in the filling reservoir is additionally heated by pumped out of the washing container by means of the drainage pump, still warm wastewater.

• – Wärmeverluste aus dem Spülbehälter nach außen werden im Füllreservoir gespeichert und durch die Wärmepumpe wieder in den Spülbehälter zurück gepumpt.
• – Zusätzlich kann das Speicherwasser im Füllreservoir durch Wärme aus der Umgebung aufgeheizt werden.
• – Es liegt ein offenes Füllreservoir als Energiespeicher vor, da das Wasser aus dem Füllreservoir nicht nur als Wärmequelle für die Wärmepumpe herangezogen wird, sondern im Spülerwasserkreislauf während eines Spülgangs integriert ist.
• – Wasserwechsel sind im Füllreservoir pro Spülgang vorhanden, wodurch die Gefahr der Verkeimung stark reduziert oder ganz vermieden ist (gegenüber einem geschlossenem System).
• – Durch die Anordnung des Füllreservoirs an der Seitenwand und nicht am Bodenraum des Spülbehälters ist eine Bauraumersparnis in der Bodengruppe der Geschirrspülmaschine sichergestellt.
• – Energiereduzierung durch Einsatz der Wärmepumpe

Advantages in particular are:

• - Heat losses from the washing outward are stored in the filling reservoir and pumped by the heat pump back into the washing.
• - In addition, the storage water in the filling reservoir can be heated by heat from the environment.
• - There is an open filling reservoir as energy storage, since the water from the filling reservoir is not only used as a heat source for the heat pump, but is integrated in the dishwasher water circuit during a wash cycle.
• - Water changes are present in the filling reservoir per wash cycle, whereby the risk of contamination is greatly reduced or completely avoided (compared to a closed system).
• - By the arrangement of the filling reservoir on the side wall and not on the bottom space of the washing container a space savings in the bottom group of the dishwasher is ensured.
• - Energy reduction by using the heat pump

Claims (23)

Household dishwasher (GS) for washing items in one or more water-carrying Teilspülgängen (eg VG, RG, ZG, KG) and for subsequent drying of the items in at least one subsequent drying cycle (TG) to be performed a wash cycle (SG) - with a washing (SB) for receiving the items to be washed, - having at least one filling reservoir (WT1) attached to the outside of the washing container (SB), the inlet (IL1) of which has a fresh water supply device (ZLV) for filling with fresh water (FW *) from a fresh water network ( WN), and its outlet (OF1) with a discharge-side fresh water discharge device (ALV) for removing a respective to be carried out Teilspülgang (eg VG, RG, ZG, KG) respectively required Fresh water quantity (ΔWMi with i = VG, RG, ZG, KG) from the filling reservoir (WT1) and to which it is fed into the rinsing container (SB), - with at least one heat pump (WP1) whose circuit is a compressor (CO), Pressure reducing agent (DM), an evaporator (VD1) and a condenser (VF1), wherein the evaporator (VD1) with the filling reservoir (WT1) for the withdrawal of heat energy (QP1) from there stored fresh water (FW) is thermally coupled and the condenser (VF1) is provided for feeding heat energy (QP1 *) into the interior of the washing container (SB), and - with an insulating material system (SW1, SW1) arranged one or more layers between the interior of the washing container (SB) and the interior of the filling reservoir (WT1) BI, IS1, WI1) for reducing a heat flow (QD) from the purge bin (SB). Domestic dishwashing machine according to claim 1, characterized in that the filling reservoir (WT1) on the outside of a wall, in particular side wall (SW1), the rinsing container (SB) is applied, in particular there is surface-contacting fixedly mounted. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the thermal insulation material system (SW1, BI, IS1, WI1) at least one, in particular flat, thermal insulation element (IS1) comprises, which is designed as a solid, in particular as Dämmvlies or foam material , Domestic dishwashing machine according to claim 3, characterized in that the flat heat-insulating element (IS1) rests on the outer wall (SW1) of the washing container (SB) on the outside or on a covering layer (BI) applied on the wall, in particular bitumen layer, and above it Füllreservoir (WT1) surface contacting contacted. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the filling reservoir (WT1) at least 50%, in particular between 70% and 100%, the total area of its associated wall (SW1), preferably substantially the total area of its associated Wall (SW1), the rinse tank (SB) covers outside. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that several, in particular the two opposite side walls (SW1, SW2), preferably all walls of the washing compartment (SB) each covered by at least one filling reservoir (WT1, WT2) from the outside are. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the filling reservoir (WT1) on its the washing compartment (SB) facing wall side (WI1) is thermally more insulated than on its the washing compartment (SB) facing away, in particular the environment facing wall side (WA). Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the thermal insulation material system (SW1, BI, IS1, WI1) taken as a whole has a heat transfer resistance R _th of at least 0.02 (Km ² ) / W, in particular between 0.1 ( Km ² ) / W and 1 (Km ² ) / W. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the filling reservoir (WT1) inside and / or outside with PCM material (PE) is provided, the phase change temperature higher than the phase change temperature of the filling in the reservoir (WT1) cached fresh water (FW ), and in particular between 3 ° C and 10 ° C. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the heat pump (WP1) is designed and / or operated in particular by means of a control device (CO) that at the end (tAE) of the carried out by means of the heat pump (WP1) Aufheizzeitabschnitts (eg APR) of a Teilspülgangs (eg RG) an existing in the washing (SB) treatment amount of water to a required minimum temperature (eg RT) with the aid of the condenser (VF1) of the heat pump (WP1) heated and the fresh water (FW) in the filling reservoir ( WT1) is cooled by means of the evaporator (VD1) of the heat pump (WP1) to a temperature (TWT) in the range between -4 ° C and + 10 ° C, in particular between 10% and 90% of the maximum filling volume (VO) of water, especially fresh water (FW), in the filling reservoir (WT1) is brought into the frozen state. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the filling reservoir (WT1) with the washing container (SB) is in thermal operative connection, and / or the heat pump (WP1) is designed and / or in particular with the aid of a control device ( CO) is operated such that the temperature (TWT) of the fresh water (FW) in the filling reservoir (WT1) during the period (RZ) after the end (eg tAE) of the heating period (eg APR) of a preceding Teilspülgangs (eg RG), in which the water in the washing (SB) existing amount of water (WMi with i = RG) has been heated with the aid of the condenser (VF1) of the heat pump (WP1) , until the start (eg tZS) of a subsequent Teilspülgangs (eg ZG), in particular to the start (eg tks) of a subsequent Teilspülgangs (eg KG), in which the heat pump (WP1) is again put into operation, lower than the temperature ( TSB) in the rinse tank (SB), and in particular predominantly during this period (RZ) is lower than the ambient temperature (UT) at the location of the domestic dishwasher. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the filling reservoir (WT1) with the washing container (SB) is in thermal operative connection, and / or the heat pump (WP1) is designed and / or in particular with the aid of a control device ( CO) is / are operated such that ice / ice water, which during the heating period (eg APR) of a preceding Teilspülgangs (eg RG), in which in the washing container (SB) existing amount of water (WMi with i = RG) with the aid of Condenser (VF1) of the heat pump (WP1) has been heated in the filling reservoir (WT1) due to heat extraction by the evaporator (VD1) has formed, until the start (eg tZS) of a subsequent Teilspülgangs (eg ZG), in particular to the start ( eg tks) of a subsequent partial wash cycle (eg KG), in which the heat pump (WP1) is put into operation again, essentially by heat transfer (QD) from the Spülbe container (SB) into the filling reservoir (WT1) and / or possibly by heat transfer (QA) from the environment of the domestic dishwasher in the filling reservoir (WT1) into at least 25%, in particular between 40% and 100%, preferably 100%, of its at the end (tAE) of the heating time (APR) of that previous Teilspülgangs (eg RG) ice volume thawed, and that the thawed water in the filling reservoir (WT1) to start (eg tZS) of the subsequent Teilspülgangs (eg ZG) a temperature (TWT) above the freezing point of water, preferably between 15 ° C and 30 ° C having. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the filling reservoir (WT1) as an open memory, in particular overflow memory is formed. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the filling reservoir (WT1), its inlet fresh water supply device (ZLV) for supplying fresh water (FW *) in the filling reservoir (WT1), and / or its outlet freshwater Abführvorrichtung (ALV) for the removal of fresh water (FW) from the filling reservoir (WT1) is / are formed, and / or in particular with the aid of a control device (CO) is adjustable / are that with the removal of fresh water (FW) from the supply of fresh water (FW *) in the filling reservoir (WT1), in particular temporally and / or quantitatively coupled to the filling reservoir (WT1) for the respective water-conducting Teilspülgang (eg ZG), in particular correlated. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the filling reservoir (WT1), its inlet fresh water supply device (ZLV) for supplying fresh water (FW *) in the filling reservoir (WT1), and / or its outlet freshwater Discharge device (ALV) for the removal of fresh water (FW) from the filling reservoir (WT1) is / are formed, and / or in particular with the aid of a control device (CO) is adjustable such that the filling reservoir (WT1) substantially the same amount of water (ΔWMi with i = VG, RG, ZG, KG) of fresh water (FW), which is taken from it for the respective water-carrying Teilspülgang (eg RG) and discharged via the fresh water discharge device (ALV) in the washing compartment (SB), is newly supplied by the fresh water supply device (ZLV) temporally largely completely overlapping to this removal. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the filling reservoir (WT1), its inlet fresh water supply device (ZLV) for supplying fresh water (FW *) in the filling reservoir (WT1), and / or its outlet freshwater Discharge device (ALV) for the removal of fresh water (FW) from the filling reservoir (WT1) is / are formed, and / or in particular with the aid of a control device (CO) is adjustable such that the filling reservoir (WT1) during the one or several Teilspülgänge (eg VG, RG, ZG, KG) and possibly also during the flushing final drying cycle (TG) of the respective wash cycle (SG), in particular on the one or more filling and / or Abpumpsequenzen the entire wash cycle (SG) away, always about the same target level, in particular maximum target level (VO), the maximum liquid filling volume of the filling reservoir (WT1) added arranges, with fresh water (FW), is filled. Household dishwasher according to at least one of the preceding claims, characterized in that the inlet-side fresh-water supply device (ZLV) for supplying fresh water (FW *) in the filling reservoir (WT1) is formed, and / or in particular with the aid of a control device (CO) is adjustable such that after the heating phase ( APR) of a Teilspülgangs (eg RG), in which in the washing container (SB) existing amount of water (eg WMi with i = RG) with the aid of the condenser (VF1) of the heat pump (WP1) has been heated and in which the filling in the reservoir (WT1 ) existing amount of fresh water (eg with i = RG) with the aid of the evaporator (VD1) of the heat pump (WP1) to a cold water temperature (TWT), which is lower than the inlet temperature (TWT *) of the fresh water (FW *), in particular to less than 8 ° C, cooled, preferably partially or fully frozen to ice, fresh water (FW *) with a higher inlet temperature (TWT *) than the cold water temperature (TWT) to regenerate this ka ltwassers or ice in the filling reservoir (SB) is recessed. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that at least one detection means (DV) is provided for detecting at least one parameter (T) which characterizes the respective heat energy content of the filling reservoir (WT1), and in that a control device (CO) with the aid of this parameter (T) the work flow, in particular the switch-on and / or switch-off states, the heat pump (WP1), and / or another component (ZV) of the filling reservoir (WT1), its fresh water supply device (ZLV) and / or controls the discharge device, in particular controls and / or regulates. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that additionally at least one water movement means, in particular flow-generating means (ZP), is provided which forces in the filling reservoir (WT1) a water movement, in particular water flow, preferably circulation flow (KS), in particular the heat pump (WP1) is in operation. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that during the predetermined heating time (APR) of the cleaning cycle (RG) and during the predetermined heating time (APK) of the rinse cycle (KG) of the respective wash cycle (SG) to be carried out exclusively the heat pump ( WP1) is provided for heating rinsing liquid in the washing container (SB). Household dishwasher according to at least one of claims 1 to 19, characterized in that in addition to the heat pump (WP1) an electric heater (HP) is provided by a control device (CO) in parallel to the heat pump (WP1) for heating rinsing liquid and / or air in the washing container (SB) to a required minimum temperature (RT, KT) is in operation, or by a control device (CO) only after the heating time of the heat pump (WP1) after their shutdown for reheating rinsing liquid and / or air in Washing container (SB) to a required minimum temperature (RT, KT) is in operation. Domestic dishwashing machine according to at least one of the preceding claims, characterized in that the heat pump (WP1) is operated during the rinsing final drying cycle (TG). A method for washing dishes in the washing container (SB) of a domestic dishwasher (GS), which is in particular formed according to at least one of the preceding claims, in one or more water-carrying Teilspülgängen (eg VG, RG, ZG, KG) and for subsequent drying of the Items to be washed in at least one subsequent drying cycle (TG) of a rinse cycle (SG) to be carried out, - where a required for the respective partial rinse (eg RG) in the washing (SB) required amount of water (WMi with i = VG, RG, ZG, KG) partially or entirely of at least one filling reservoir (WT1) attached to the outside of the washing container (SB), the inlet (IL1) of which is connected to an inlet-side fresh water supply device (ZLV) for filling with fresh water (FW *) from a fresh water network (WN), and its outlet (OF1) with a discharge-side fresh water discharge device (ALV) for removing a respective to be carried out Teilspülgang (eg RG) respectively s demanded amount of fresh water (ΔWMi with i = VG, RG, ZG, KG) from the filling reservoir (WT1) and to the supply in the washing compartment (SB) is connected, removed and the rinse tank (SB) is fed, - wherein for at least one the Teilspülgänge (eg RG), for the amount of water (WMi with i = RG) in the interior of the washing (SB) heating to a minimum temperature (eg RT) is required, heat energy (QP1) by means of the evaporator (VD1) a heat pump (WP1 ) withdrawn from the fresh water (FW) stored in the filling reservoir (WT1) and heat energy (QP1 *) is fed by means of the condenser (VF1) of the heat pump (WP1) in the interior of the washing compartment (SB), - and by a between the interior the rinsing container (SB) and the interior of the filling reservoir (WT1) provided single or multi-layer insulation material system (SW1, BI, IS1, WI1) a Heat flow (QD) from the washing container (SB) is reduced.

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