WO2010142558A1

WO2010142558A1 - Dishwasher allowing an automatic or manual selection of hot water supply and control method

Info

Publication number: WO2010142558A1
Application number: PCT/EP2010/057572
Authority: WO
Inventors: Roland Rieger; Michael Rosenbauer
Original assignee: BSH Bosch und Siemens Hausgeräte GmbH
Priority date: 2009-06-10
Filing date: 2010-06-01
Publication date: 2010-12-16
Also published as: DE102009026878A1

Abstract

The invention relates to a dishwasher, especially a domestic dishwasher (1), comprising a water inlet device (500) having a hot water inlet (6, 7) and a cold water inlet (8, 9), the hot water inlet (6, 7) being adapted to receive hot water from an external hot water supply (WH) and the cold water inlet (8, 9) being adapted to receive cold water from an external cold water supply (KH). The dishwasher further comprises a program control device (19) for controlling at least one wash cycle for cleaning dishes. The program control device (19) allows the automatic selection of hot water supply from the external hot water supply (WH) or the manual selection of hot water supply from the external hot water supply (WH) by means of at least one operational control (20), especially a supplementary function key (30).

Description

Dishwasher with automatic or manual selection of hot water and control method

The invention relates to a dishwasher, in particular domestic dishwasher, with a water inlet device, which has a hot water inlet and a cold water inlet, wherein the hot water inlet for receiving hot water from an external hot water supply and the cold water inlet for receiving cold water from an external cold water supply is provided, and with a flow control device for controlling at least one rinse cycle for cleaning items to be washed.

The domestic appliance of DE 100 46 347 A1 an external water supply device is provided with a cold water valve and a hot water valve. Both the cold water valve and the hot water valve can be opened or closed by means of a control device as a function of operating conditions of the household appliance. The cold water valve and the hot water valve are each connected via a water supply hose to a downstream downstream branch, which is arranged outside the household appliance. The single output of the branch is connected via a further, external water supply hose with a housing-fixed water inlet of the dishwasher. In this way, the hot water required by the dishwasher can be taken from a hot water supply line whose water is heated by a household heating system.

DE 100 57 263 mentions a hot water supply for a household appliance, which has solar panels for hot water.

The invention has for its object to provide a dishwasher, in particular domestic dishwasher, which is designed for a user in the simplest possible way for energy-efficient operation. This object is achieved in a dishwasher, in particular domestic dishwasher, of the type mentioned in that the flow control device for automatic selection of hot water reference from the external hot water supply or manual selection of hot water reference from the external hot water supply by means of at least one operating device, in particular additional function button is formed.

If the sequence control device automatically selects the hot water reference from the external hot water supply, the energy efficiency of a dishwasher program can be improved without intervention or intervention by a user and thus for him in a comfortable manner.

If the hot water reference from the external hot water supply by means of at least one operating device, in particular additional function key, manually selectable by the user, this is left to him free, when, especially for which dishwashing program, a hot water reference is made. The possibility of selecting the hot water supply may be particularly advantageous if the external hot water supply is partially or completely fed in particular by a thermal solar system. Is e.g. during the summer half-year, the hot water preparation of the external hot water supply by the solar thermal system more energy efficient than by the device-internal heating device of the dishwasher, in particular the user can, for example. be displayed by means of an optical and / or acoustic display device that the hot water reference by activation of the operating device, in particular the additional function button, is cheaper. Such an operating device allows the operator to decide for himself whether hot water may or should be used, or whether only cold water should be recorded. The operating device may be, for example, an additional function key, such as a button. However, it is also possible to provide operating modes for switching the operating mode, which are already provided for other operating interventions, conceivable being multifunction keys, rotary knobs, touch screens, alphanumeric input units and more.

In accordance with an expedient development of the invention, the general-purpose flow control device can be embodied in such a way that the hot water reference from the external hot water supply is provided by the flow control device. tion is then provided partially or completely, if this is more energy efficient than the self-heating means of the device's own heating device of the dishwasher. This comparison provides a simple decision rule when a hot water reference is appropriate.

Suitably, the supply of external hot water supply can be partially or completely particular by a solar thermal system, as this alone with the primary energy of the sun (and not fossil fuels) causes a partial or complete contribution to the heating of water in the external hot water supply.

A low-cost hot water supply, in addition to or in addition to a solar system in the home by a modern condensing boiler such. Pellet stove, wood chips, or Holzscheitheizung, a combined heat and power plant, geothermal heat pump, air heat pump system, a district heating system or a local heating system, individually or in any combination, etc. are provided. In particular, e.g. the combination of a pellet stove with a solar thermal system to be energetically advantageous.

According to an expedient development of the invention, the sequence control device has a first operating mode, in which at least one rinsing program can be called, which provides for the use of hot water from the external hot water supply in at least one rinsing program step, a second operating mode in which at least one rinsing program can be called up, which at least one rinsing program step exclusively provides for the use of cold water from the external cold water supply, and / or a third mode in which at least one rinsing program can be called, which in at least one rinsing program step, the mixing of hot water from the external hot water supply with cold water from the external Provides cold water supply. As a result, depending on the degree of heating of the water of the external hot water supply in a flexible manner only a hot water reference from the external hot water supply, only a cold water reference from the external cold water supply, or a mixed operation with respect to hot water the external hot water supply and with respect to cold water from the external cold water supply provided

For selecting the respective operating mode, it may be particularly expedient if the hot water inlet comprises a hot water valve and the cold water inlet comprises a cold water valve, wherein the hot water valve and the cold water valve are independently controllable by the sequence control device.

The hot water valve is expediently arranged at an upstream end of a hot water hose and is designed so that it can be fastened to a connection piece, in particular a tap, of the external hot water supply. In an analogous manner, the cold water valve is expediently arranged at an upstream end of a cold water hose and designed such that it can be fastened to a connection piece, in particular a tap, of the external cold water supply.

According to an advantageous embodiment of the invention, a downstream end of the hot water hose and a downstream end of the cold water hose with a connector, in particular Y-connector, liquid-conducting connected. This connector provides a universal connection device for different connection conditions, e.g. a standalone cold water connection, a standalone hot water connection, as well as a simultaneously existing hot water connection and cold water connection ready.

In particular, according to a first advantageous embodiment variant, the connection piece outside the dishwasher can be connected to the hot water hose and the cold water hose in a freely suspended manner via an external feed hose to the appliance-side water inlet device of the dishwasher. This can e.g. then be useful if the connector is only subsequently mounted on the dishwasher as an additional component.

According to a second advantageous embodiment, however, it can be particularly expedient for the connecting piece to be connected to the device-side water inlet. Lasseinrichtung the dishwasher on the device side, in particular device inside, is appropriate. Characterized in that the water inlet device of the dishwasher according to the invention, in particular domestic dishwasher, on the device side equipped with a connector, in particular already factory-prepared, the connection of the dishwasher to an external hot water supply and an external cold water supply for an operator is facilitated or simplified. Because it is not necessary to obstruct the connector as a loose, bulky component outside the dishwasher in the external space between the external hot water supply, the external cold water supply and the dishwasher by means of three long water hoses. Since the connecting piece can be attached directly to the water inlet device of the dishwasher, an outwardly guided, ie long out of the housing of the dishwasher out water supply hose between the water inlet device of the dishwasher and the connector can be omitted. The connector is thus preferably provided as a device-side equipment component. In particular, it can form an installation component in the dishwasher or an attachment to the dishwasher. By the device-side attachment of the connector, this mechanically safe, that can be reliably connected to the water inlet device. Unacceptable stresses, in particular unacceptably high tensile loads on the connector, and other unacceptable damage to the connector are largely avoided in this way, which in contrast with a free, "overhead-down" suspension of the connector to the water connections, especially taps of the external In particular, two external water supply hoses for connecting the hot water supply line section of the connection piece to the external hot water supply and the cold water supply line section of the connection piece to the external cold water supply are advantageously sufficient, ie two connection processes suffice, which makes installation easier for an operator or an operator Simplifies a fitter, in particular, unacceptably high tensile loads or other impermissibly large mechanical stresses this Wasserzul hoses and water connections, in particular taps for external hot water supply and external cold water serversorgung, to which the water inlet hoses are coupled upstream side, largely avoided, which in contrast can occur in the case of a freely suspended connector by its own weight becoming effective. Furthermore, the storage and the packaging of the dishwasher is simplified by eliminating the connector as loose, external extra component. In addition, a device-side attachment of the connector ensures a kind of standardization, in particular standardization of the assembly or production, warehousing and packaging of such trained dishwashers.

The dishwasher according to the invention with the externally or device-side mounted connector is thus prepared so that it can be connected to an external hot water supply alone, an external cold water supply alone, or both an external hot water supply and an external cold water supply, depending on the existing water connection conditions.

According to an expedient development of the invention, the output of the connecting piece is formed by a substantially material-rigid, in particular rigidly formed, output line section. The connector of the device-side water inlet device is preferably also material stiff, in particular rigid. As a result, a stable, mechanically fixed connection connection between the connector and the connector of the device-side water inlet device can be provided in an advantageous manner. The output line section and the connecting piece can in particular be connected to one another in a fluid-tight manner by latching, screwing, clamping, form fit or snug fit, frictional connection, adhesive bonding, etc., or any other connection technique. Possibly. For example, the outlet fitting of the fitting and the fitting of the water inlet fitting may also be integrally connected, i. e. form a single molding.

According to a further expedient development of the invention, the connection piece of the device-side water inlet device on the outer housing or within the outer housing of the dishwasher, the washing container, or preferably on or in the bottom assembly of the dishwasher, preferably fixed, provided. Such equipped dishwasher allows a particularly integrated, mechanically protected attachment of the connector. In addition, the thus formed dishwasher largely retains its original, compact external dimensions even after installation or installation of the connector.

According to a further expedient development of the invention, the hot water supply line section and / or the cold water supply line section of the connecting piece, in particular at the factory, are preferably closed by a plug. As a result, the dishwasher is equipped with a universal connection option. If, for example, only an external cold water connection of the connecting piece is available, the cold water inlet section can be opened, in particular its inlet-side plug, removed and only this can be connected to the cold water supply while the hot water supply line section remains closed. Accordingly, the hot water supply line section is opened if only one external hot water connection is available. The cold water connection, however, remains closed. If both an external hot water connection and an external cold water connection are available, it is expedient to open the inlet-side hot water supply line section and the input cold water supply line section of the connection section and connect the hot water supply line section to the external hot water connection and the cold water supply line section to the external cold water connection.

According to a further expedient development of the invention, it may be advantageous if the inlet-side hot water supply line section and the inlet-side cold water supply line section of the connection section are substantially formed as material-rigid, in particular substantially rigid connecting pieces. As a result, the connection of a water supply hose to the input-side cold water supply line section and a water supply hose to the input-side hot water supply line section of the connecting piece is facilitated. Appropriately, the inlet-side hot water supply line section via a device external supply line, in particular hose, to a hot water valve, in particular an aquastop, connectable, and / or the inlet side cold water inlet section via a device external supply line, in particular hose, to a cold water valve, in particular an aquastop valve, connected. Through the valves it is possible to regulate the supply of hot water and / or cold water. These can be controlled in particular by the flow control device of the dishwasher with regard to their flow rate.

According to a preferred embodiment of the invention, the hot water valve to a connector of an external hot water supply, which is partially or completely fed in particular by a solar thermal system, attachable, and the cold water valve to a connector of an external cold water supply attachable. This significantly improves the energy efficiency of the dishwasher, since in particular for the solar thermal heated hot water no combustion of fossil fuels is required.

In particular, it is expedient to provide a sequence control device in the respective dishwasher for controlling at least one rinse cycle for cleaning items to be washed. The sequence control device controls the hot water valve and the cold water valve in an advantageous manner such that in a first operating mode for at least one program step at least one wash program the hot water valve for supplying hot water from the hot water supply apparently and the cold water valve is closed durable that in a second mode for at least a program step of at least one wash program the cold water valve for supplying cold water from the cold water supply is visible and the hot water valve closed durable, and / or that in a third mode for at least one program step at least one program for mixing hot water and cold water, the hot water valve for supplying hot water the hot water supply and additionally the cold water valve for supplying cold water from the cold water supply is apparent. By means of this automated control by means of the sequence control device, the energy-efficient operation of the dishwasher according to the invention is convenient and simple for an operator. In particular, a data interface for receiving operating data of the external hot water supply can be provided. The sequence control device is expediently designed for the automatic selection of the respective operating mode on the basis of the received operating data. In this way, the sequence control device can independently recognize whether, in particular, a solar thermal system can supply a sufficient amount of hot water for carrying out at least one program step of a dishwasher program to be started.

A thermal solar system is a technical system for converting solar energy into usable thermal energy. This thermal solar systems usually provide hot water in a temperature range of, for example, 40 ⁰ C to 70 ⁰ C ready, which makes a direct use of hot water for heating buildings but also as service water possible. Thermal solar systems typically include a plurality of solar collectors having an absorber surface that is heated by the electromagnetic solar radiation. From there, the heat can be transported by means of a fluid to a heat exchanger that generates the hot water.

In favorable conditions, even in temperate climates, the hot water requirements of a household can already be covered with collector areas of a few square meters. The production costs for the recovered heat energy are extremely low. However, in many places, for example in Central Europe, in the winter months, in summer bad weather periods or in a high hot water demand, the performance of the solar panels is not sufficient. Solar systems therefore have in many cases a conventional additional heating, for example, a gas or oil heating in order to have sufficient hot water available even in such a situation. However, if it is necessary to resort to the additional heating, as a rule, the production costs for the provided hot water increase.

The use of hot water from a household heating system, which is partially or completely fed in particular by a solar system, can be to a Save on electrical energy, since in this case the energy requirements of an electric radiator of the dishwasher can be reduced or eliminated altogether. Against the background of generally increased operating costs of household heating systems, however, especially with the help of the flow control, to check and decide whether the additional costs for the operation of household heating system, in particular solar thermal hot water system generated by the removal of hot water from a house-side hot water supply line the saved costs for electricity of the electric heating device of the dishwasher exceed or lie below.

The dishwashing machine according to the invention makes it possible, in particular, to efficiently use cost-effective hot water, in particular by means of a solar system. For this purpose, the sequence control device preferably has a first operating mode in which at least one rinsing program can be called, which provides for hot water from the hot water supply in a rinse, and wherein the flow control device has a second mode, in which at least one rinse program can be called, which at a rinse exclusively a use of cold water from the cold water supply provides. The first operating mode is therefore a hot water operation in which for a rinse at least partially hot water from the, in particular solar thermal assisted, hot water supply is used, while it is a pure cold water operation in the second mode, in which for a rinse exclusively Cold water from the cold water supply is used.

The first mode of operation allows efficient rinse cycles when the cost savings due to the reduction of the internal heating requirement of the dishwasher is greater than the additional cost of operating the hot water supply resulting from the removal of hot water. On the other hand, the second mode of operation makes it possible to carry out rinsing cycles efficiently if the cost savings due to the reduction of the internal heating requirement of the dishwasher is lower than the additional costs of operating the hot water supply, which results from the removal of hot water. In this case, it is possible, for example, to adapt the course of rinse cycles to the power generated by the solar collectors without requiring a change to the building-side installation or to the connection of the dishwasher to the building-side installation. In particular, it is not necessary to open or close faucets or valves installed on the building side. Also, it is not necessary to connect connecting hoses of the dishwasher with the building-side connections or to separate them.

If the solar panels provide a heat surplus in relation to the other requirements of the household, this excess heat can be used to reduce the internal energy requirement of the dishwasher in a simple manner by selecting the first operating mode. If, on the other hand, the solar collectors provide too little heat in relation to the heat demand of the household, it can be prevented by selection of the second operating mode that heat is withdrawn from the hot water supply, which would have to be compensated by heating with the usually more expensive additional heating.

The rinse programs which can be called upon selection of the first operating mode are preferably adapted with regard to their time sequence especially to the use of hot water, in particular from the thermal solar system. Likewise, the wash programs that can be called upon selection of the second operating mode are particularly adapted to the use of cold water with regard to their time sequence. In both cases, such a predetermined cleaning effect or drying effect can be achieved with high efficiency.

In the first operating mode and in the second operating mode, corresponding rinsing programs can advantageously be provided, which are similar by a substantially identical cleaning action and / or drying effect. For example, corresponding normal rinse programs, corresponding intensive programs, corresponding soft-programs or corresponding automatic programs may be provided. The corresponding programs can alternatively or additionally be designed as quick-flushing programs. According to an expedient development of the invention, at least one washing program can be called in the first operating mode, which provides at least one program step for washing items to be washed using hot water from the hot water supply.

If a program step by its nature requires or at least makes desirable the use of water at a high temperature, hot water may be taken from the external water supply for this program step in the first mode. Such a program step for rinsing items to be washed can be, in particular, a cleaning step and / or a rinsing step, since it is generally provided there that the items to be washed are treated with relatively hot water. The hot water can be taken before or during the respective program step.

A recording of hot water for such a program step is particularly energy and more cost-effective than a recording of cold water when the hot water supply, in particular thermal solar system, provides sufficient heat energy. The reason for the increased cost efficiency is that when receiving hot water, the internal electrical energy consumption of the dishwasher for a rinse by a reduced electrical energy consumption for heating the absorbed water drops significantly. This can lead to a significant reduction in household electricity costs. In this way, an increase in efficiency compared to a dishwasher can be achieved, which is provided exclusively for connection to a cold water supply.

According to a preferred embodiment of the invention is provided according to a third mode, that in addition to the hot water supply from the external hot water supply according to the first mode at least one wash program can be called, which additionally provides for a rinse a use of cold water from the cold water supply. In this embodiment, the third mode is a combined warming and cold water operation where hot water is mixed with cold water. Due to the at least partial use of cold water from the external cold water supply, it is possible program steps in which the use of hot water with too high temperature from the external hot water supply would bring any advantages or disadvantages would be carried out instead using mixed water efficiently. Again, the additional intake of cold water in addition to the hot water before or during the respective program step.

Unlike a dishwasher, which e.g. is intended exclusively for connection to a hot water supply, so spültechnologische disadvantages can be avoided, which could occur by a forced use of hot water in special program steps. In addition, by the partial intake of cold water from the external cold water supply, the amount of hot water, which must be removed from the external hot water supply for a rinse to achieve a required total amount of water can be reduced, without thereby substantial disadvantages in terms of cleaning effect and / or the drying effect in Purchase would have to be taken. In this way, it can be ensured in the third operating mode, in particular, that the amount of warm water withdrawn from the hot water supply, in particular the solar system, when carrying out a rinse is expediently restricted to a minimum. As a result, the third operating mode can also be usefully selected if the solar collectors supply comparatively little heat energy.

Overall, in particular in the third mode of operation rinsing programs for controlling a rinse are possible which the implementation of individual program steps using hot water from the external hot water supply, the implementation of other program steps using cold water from the external cold water supply, and the implementation of other program steps using Provide cold water from the external cold water supply and simultaneous use of hot water from the external hot water supply. In this way it is possible to compare both to known dishwashers which, as is common in Europe in particular, Finally, provided for connection to a cold water supply, as well as with respect to known dishwashers, which - as usual especially in North America - are provided exclusively for connection to a hot water supply, a significant increase in efficiency can be achieved.

In summary, in the dishwasher according to the invention, in particular domestic dishwasher, an operating device is provided which enables a manual selection of the operating mode. Such an operating device allows the operator to decide for himself whether hot water may be used, or whether only cold water should be recorded. The operating device can be, for example, an additional button which is arranged on a control panel of the dishwasher. In particular, in the case of a thermal solar system, this can be designed as a hot water supply as a "solar button" with which the supply of hot water from an external solar thermal hot water system can be activated Conceivable are multifunction buttons, rotary knobs, touch screens, alphanumeric input units, etc. In a similar manner, an operating device with appropriately marked function key can also be provided for the dishwasher in other types of hot water supply systems.

Alternatively to the manual selection of the respective operating mode, the sequence control device of the dishwasher according to the invention can make an automatic selection of hot water reference from the external hot water supply.

According to an expedient development of the invention, the dishwasher has for this purpose a data interface which is provided for receiving operating data of the hot water supply, in particular a thermal solar system, wherein the sequence control device is designed for automatic selection of the operating mode on the basis of received operating data. Such operating data can be, for example, information concerning the power of the solar panels or information concerning the in a heat storage of a Solar system stored amount of heat act. In this way, an automatic selection of each more efficient mode is possible.

According to an expedient development of the invention, the dishwasher may have a data interface, which is provided for receiving operating data of the respective existing hot water supply system, in particular solar thermal system, wherein the flow control device is designed for automatic selection of the operating mode based on received operating data. Such operating data can be, for example, information concerning the power of the solar panels or information relating to the amount of heat stored in a heat storage of the solar system. In this way, an automatic selection of each more efficient mode is possible.

According to a preferred development of the invention, it is provided that the hot water inlet comprises a hot water valve and the cold water inlet comprises a cold water valve, wherein the hot water valve and the cold water valve are independently controllable by the sequence control device. This makes it possible in a simple manner to carry out the intended by the washing programs of the two modes recording hot water from the hot water supply and / or cold water from the cold water supply. In particular, can be dispensed with an external device for controlling the water absorption.

According to an expedient development of the invention, it is provided that the hot water valve is arranged at an upstream end of a hot water hose and adapted to be fastened to a fitting of the external hot water supply, and / or that the cold water valve is arranged at an upstream end of a cold water hose and so is formed so that it is attachable to a connector of the external cold water supply. The hot water valve and / or the cold water valve can for this purpose have connection threads, for example, which correspond with threads of household faucets. Such valves can be designed in particular as so-called Aquastop valves. The arrangement of the hot water valve and / or the cold water valve at the upstream end of the water inlet device has the advantage that practically no leakage water can escape from the dishwasher, even in the event of damage, as long as the valves are closed. If the valves are designed to close when not energized, leaking of leakage water from a switched-off dishwasher is prevented in virtually all cases. In order also to prevent leakage of leakage water from a switched-on dishwasher, the flow control device may be associated with a leak water sensor for detecting leakage water, so that the flow control device can close the valves when leak water occurs during operation of the dishwasher.

The invention also relates to a method for controlling a dishwasher, in particular domestic dishwasher, with a water inlet device having a hot water inlet and a cold water inlet, wherein the hot water inlet for receiving hot water from an external hot water supply and the cold water inlet is provided for receiving cold water from an external cold water supply , And with a sequence control device for controlling at least one rinse cycle for cleaning items to be washed, which is characterized in that automatically selected by means of the flow control device, the hot water reference from the external hot water supply, or the hot water reference from the external hot water supply by means of at least one control device, in particular additional function button, manually is selected by an operator.

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

The invention and its developments are explained in more detail with reference to drawings. Show it:

Figure 1 is a schematic spatial representation of an embodiment of a dishwasher according to the invention; Figure 2 is a schematic block diagram of the dishwasher according to the invention of Figure 1;

FIG. 3 schematically shows a rinsing program of a first operating mode of the e dishwasher of FIG. 1, and FIG

FIG. 4 schematically shows a rinsing program of a second operating mode of the e

Dishwasher of Figure 1.

In the following figures, corresponding parts are provided with the same reference numerals. In this case, only those components of a dishwasher are provided with reference numerals and explained, which are necessary for the understanding of the invention. It goes without saying that the dishwasher according to the invention can comprise further parts and assemblies.

1 shows a schematic three-dimensional view of an advantageous embodiment of a dishwasher 1 according to the invention. This has a washing container 2 which can be closed by a door 3, so that a washing cell for washing dishes is produced. The rinsing container 2 is arranged in the interior of a housing 4 of the dishwasher 1, which may have standard dimensions. For example, the housing 4 may have a width of 45 cm or 60 cm, which enables integration of the dishwasher 1 into a standard kitchen unit with a corresponding installation niche. For example, for fully integrated built-in appliances, this outer housing may also be partially or completely omitted. For example, the side walls of the housing may be omitted.

In the dishwasher according to FIG. 1, the items to be washed, in particular items to be washed, are introduced into the washing container 2 and are cleaned there in a so-called rinsing process, which is also called rinse, with the aid of water and then dried. The aim is to perform a rinse so that a predefined cleaning result and a predefined drying result are achieved as efficiently as possible. Required is in particular especially a high overall efficiency, which results from the cleaning efficiency and the drying efficiency. The cleaning efficiency corresponds in particular to the ratio of the cleaning result achieved by means of a rinse cycle and the effort required for this purpose, wherein the effort can comprise one or more dimensions, for example the energy requirement, the water requirement and / or the time requirement. Furthermore, the drying efficiency corresponds in particular to the ratio of the drying result achieved by means of a rinse cycle and the effort required for this purpose, wherein the effort here can also include one or more dimensions, for example the energy requirement and / or the time required.

In the present dishwashing machine 1, a sequence control device 19 is provided, in which one or more wash programs for controlling a specific wash cycle for cleaning items to be washed are stored. The sequence control device is designed such that it automatically controls a rinse cycle according to a rinse program usually selected by an operator. The water required for carrying out rinsing can be taken up via a device-side, in particular device-rear water inlet device 131, which can absorb water, for example, from a building side installed cold water supply and / or external hot water supply.

A wash program preferably has several successive program steps for the treatment of the items to be washed, wherein the water is provided in the water-conducting program steps depending on the respective program step with cleaning, rinsing, and / or additives and brought to a favorable temperature for each program step. In order to be able to provide the water intended for rinsing with the intended cleaning and / or additives, the dishwasher 1 usually has an automatic dosing device. This has been omitted in the figure 1 for the sake of clarity.

In order to clean the items to be washed in this time sequence, a typical washing program comprises a pre-washing step, a cleaning step, an intermediate rinsing step and a rinsing step in which the items to be washed are each provided with water. is aufschlagt. However, it is also possible to provide rinsing programs in which one or more of these program steps are hidden. Also, rinse programs are possible in which one or more of these program steps are repeated several times or one or more additional steps. Furthermore, a typical washing program includes a subsequent drying step for drying the cleaned items to be washed.

A pre-rinse step serves primarily to remove coarse contaminants from the items to be washed. The purpose of a subsequent cleaning step is to completely remove contaminants from the dishes. An optionally subsequently performed intermediate rinsing step can serve in particular for the removal of cleaning agent residues which adhere to the items to be washed. A subsequent rinse step is intended in particular to avoid stains on the items to be washed, which could be caused by dissolved substances in the water, such as, for example, salt and / or lime. For this purpose, the water is added during the rinse step with rinse aid.

When the dishwasher operates with so-called self-drying, another object of the rinse step is to prepare the subsequent drying step. The items to be washed are heated to a high temperature during the rinse step. In the subsequent drying step, water droplets adhering to the hot items evaporate and, on the inside of the rinse container, beat off as liquid droplets due to the lower temperature prevailing there.

Furthermore, the dishwasher 1 may optionally have a conventional electric heater to bring the water intended for rinsing to the required temperature for the respective heated water demanding program step, in particular for the cleaning and rinsing step. This heater has also been omitted in FIG. 1 for the sake of simplicity.

On the back of the dishwasher 1, the schematically illustrated water inlet device 131 is arranged with its connection piece 12. The connection piece 12 of the appliance-side water inlet device 131 can at the outer housing or within the outer housing 4 of the dishwasher 1, preferably be provided on the washing compartment 2. It is particularly expedient to provide the connecting piece 12 on or in the base assembly BG of the dishwasher 1, in particular in a stationary manner. This advantageous arrangement of the water inlet device is additionally shown in phantom in Figure 1 and designated 132.

At this device-side water inlet device 131 and 132, a connector 5 is attached to an inlet side hot water supply line section 7 for the supply of hot water from an external hot water supply WH and with an inlet side Kaltwasserzulaufleitungsabschnitt 9 for the supply of cold water from an external cold water supply KH as a device-side provided equipment component. In this case, the connection piece 12 of the water inlet device 131 or 132 on the device side with the Y-connector 5 is preferably already factory fitted and thus prepared the dishwasher with a bithermic water connection. As a result, the connection of the dishwasher to an external hot water supply and to an external cold water supply for an operator is facilitated or simplified.

Because it is not necessary to obstruct the connector as a loose, bulky component outside the dishwasher in the external space between the external hot water supply, the external cold water supply and the dishwasher by means of three long water hoses. Since the outlet 1 1 of the Y-connector 5 can be attached directly to the connection piece 12 of the water inlet device 131 or 132 of the dishwasher, in particular can be coupled, a guided outwardly, ie long out of the housing 4 of the dishwasher 1 water supply hose 11 1 between the water inlet device 131 of the dishwasher 1 and the Y-connector 5 omitted. The omission or the absence of such outwardly directed water supply hose 1 11 is symbolized in the figure 1 by a cross. The Y-connector 5 is thus preferably provided as a device-side equipment component, ie in particular a built-in component or an attachment in or on at least one part such as the rear wall or particularly preferably the floor assembly BG of Geschirrspülmaschi- ne. In particular, it extends only within the predetermined length, width, depth, height dimensions of the dishwasher. Preferably, the Y-connector 5 within a recess or recess on the rear wall side of the bottom assembly BG to the provided there connector 12 of the water inlet device 132 directly, ie without external, led out to the outside line hose, be coupled. Such equipped dishwasher allows a particularly integrated, mechanically protected attachment of the connector. By the device-side attachment of the Y-connector 5, this mechanically safe, ie reliably connected to the water inlet device 131 and 132, respectively. Unacceptable stresses, in particular tensile loads on the connector, as well as other unacceptably large damage to the connector are largely avoided in this way, in contrast, with a free "overhead-down" suspension of the connector to the water connections, especially faucets of the external hot water supply WH and external cold water supply KH - as shown in Figure 1 and crossed out with a cross - may go along.

In particular, two external water supply hoses 71, 91 for connecting the input side hot water supply line section 7 of the Y connector 5 to the external hot water supply WH and the input side cold water supply line section 9 of the Y connection 5 to the external cold water supply are particularly sufficient in the device side mounting of the Y-connector 5 KH, ie two connection operations are sufficient, which simplifies the installation for an operator or a fitter. The total water supply device thus formed is designated by 500 in FIG. In this case, in this particular unacceptable tensile loads or other impermissible mechanical stresses these water inlet hoses and water connections, especially taps of the external hot water supply WH and the external cold water supply KH, where the water inlet hoses 71, 91 are coupled upstream, largely avoided, which in contrast, in the alternative, a free Suspended connector can occur through its effective self-weight. Furthermore, the storage and the packaging of the dishwasher is simplified by the elimination of the connector as loose, external, freely suspended extra component. In addition, the device-side attachment of the connector ensures a kind of standardization, in particular standardization of the assembly or production of dishwashers designed in this way. The dishwasher according to the invention with the device-side mounted connector is prepared in this way so that it can be connected to an external hot water supply alone, an external cold water supply alone, or both an external hot water supply and at the same time to an external cold water supply depending on the existing water connection conditions.

Conveniently, the output 11 of the Y-connector 5 is formed by a substantially rigid material, in particular rigidly formed output line section. The connector 12 of the device-side water inlet device 131 or 132 is preferably also material stiff, in particular rigid. As a result, a stable, mechanically fixed connection connection between the connector and the connector of the device-side water inlet device can be provided in an advantageous manner. The output line section and the connection piece can in particular be connected to one another in a fluid-tight manner by latching, screwing, jamming, form fit or snug fit, adhesion, gluing, etc., or any other connection technique. Possibly. For example, the outlet fitting of the fitting and the fitting of the water inlet fitting may also be integrally connected, i. e. form a single molding.

Advantageously, the hot water supply line section 7 and / or the cold water supply line section 9 of the Y connection piece 5 can be factory-closed, preferably in each case by a plug. As a result, the dishwasher is equipped with a universal connection option. If, for example, only an external cold water connection KH is available, the cold water inlet section 9 of the Y connection piece 5 is opened, in particular its inlet-side plug, and only this cold water inlet section 9 is connected to the cold water supply KH, while the hot water supply Run line section 7 remains closed. Accordingly, the hot water supply line section 7 is opened when only an external hot water connection WH is present. The cold water connection, however, remains closed. If both an external hot water connection and an external cold water connection are available, it is expedient to open the inlet side hot water supply line section 7 and the input side cold water supply line section 9 of the Y connection section 5 and the hot water supply line section 5 to the external hot water connection WH and to connect the cold water supply line section 9 to the external cold water connection KH.

Here, in the exemplary embodiment, the inlet-side hot water supply line section 7 and the inlet-side cold water supply line section 9 of the connection section are also designed substantially as material-rigid, in particular substantially rigid, connecting pieces. Thereby, the connection of a device external, preferably flexible, water supply hose 71 between the water connection, in particular faucet of the hot water supply WH and the input side hot water supply line section 7 and the connection of a device external, preferably flexible, water supply hose 91 between the water connection, in particular faucet of the cold water supply KH and the Input side cold water supply line section 9 facilitates.

Here in the exemplary embodiment, the inlet-side hot water supply line section 7 is connected on the input side via the external supply line 71, in particular hose, to an upstream, controllable hot water valve 6, and the inlet side cold water inlet section 9 on the input side via the external supply line 91, in particular hose, to an upstream arranged , controllable cold water valve 8 connected. The hot water valve 6 and cold water valve 8 are basically constructed identically. For example, both valves 6, 8 may be formed as a solenoid valve. The inlet sides of the valves 6, 8 are each designed so that they can be attached to the fittings, for example to the taps of the hot water supply WH and the cold water supply KH of a household water supply system. The connection can each by means of a Screw connection, a snap connection or the like. Through these valves 6, 8 it is possible to regulate the supply of hot water and / or cold water. These are controllable in particular by the flow control device 19 of the dishwasher with regard to their flow rate. Such valves 6, 8 are designed in particular as Aquastop valves. Advantageously, these are closed when they are not activated, so that the dishwasher 1 is disconnected from the hot water and the cold water supply in the off state. In this way, leakage of leakage water from the switched-off dishwasher 1 can be avoided in the event of a fault.

The input side of the hot water valve 6 is therefore attached to a fitting, in particular faucet, the external hot water supply WH, which is partially or completely fed in particular by a solar thermal system, and the input side of the cold water valve 8 is at a fitting, in particular faucet, the external cold water supply KH attached. This considerably improves the energy efficiency of the dishwasher, since the combustion of fossil fuels is not required for the solar thermal heated hot water.

In the embodiment of Figure 1 thus the input side of the hot water valve 6 are connected to a hot water tap and the input side of the cold water valve 8 to a cold water tap. The output side of the hot water valve 6 is connected to the hot water hose 71 and the output side of the cold water valve 8 with the cold water hose 91, the downstream ends of the hot water hose 7 and the cold water hose 9 to the input sides of the hot water supply line section 7 and the Kaltwasserzu- supply line section 9 of the device side attached Y-connector δ led and connected to these liquid-tight. By means of the device-side Y-connector 5, it is therefore possible to individually direct hot water from an external hot water supply WH and / or cold water from an external cold water supply KH into the interior of the dishwasher 1. The hot water hose 71 and the cold water hose 91 may be formed as safety hoses with an inner water-carrying pressure hose and an outer Hüllschlauch, wherein between the pressure hose and sheath each a leak water channel for discharging any leak water may be provided. In this case, the Y-connector 5 may be formed so that the leakage water passages of the hot water hose 71 and the cold water hose 91 are interconnected so that leakage water, which occurs during operation of the dishwasher 1, via a leakage water channel in the device side Y-connector 5 and fixed to the housing Connector 12 can be passed into the interior of the dishwasher 1. Here it can be detected by a leak water sensor, not shown, so that appropriate measures, such as closing the hot water valve 6 and cold water valve 8, can be initiated.

Alternatively to this device-side, in particular device-internal attachment of the Y-connector 5 for connecting the input side of the hot water valve 6 to the hot water tap of the hot water supply WH and for simultaneous connection of the input side of the cold water valve 8 to the cold water tap of the cold water supply KH, it may be appropriate if the Y-connector 5 externally, that is provided outside the dishwasher 1. The output side of the hot water valve 6 is connected to the hot water hose 71 and the output side of the cold water valve 8 with the cold water hose 91, wherein the downstream end of the hot water hose 71 with the associated hot water supply section 7 and the downstream end of the cold water hose 91 with the associated hot water supply section 9 of the Y- Connector 10 is connected. At its output side, a common, external inlet hose 11 1 for hot water and cold water connects, which in turn is connected to a connector 12 on the housing 4 of the dishwasher 1. By means of the external water supply device 5, it is consequently possible to individually direct hot water from an external hot water supply WH and / or cold water from an external cold water supply KH into the interior of the dishwasher 1. In this external attachment of the Y-connector 5 are the hot water hose 71, the cold water hose 91 and / or the common Inlet hose 11 1 suitably designed as a safety hoses with an inner water-carrying pressure hose and an outer Hüllschlauch, wherein between the pressure hose and sheath each a leak water channel for discharging any leak water may be provided. In this case, the Y-connector 5 may be formed so that the leakage water channels of the hot water hose 71, the cold water hose 91 and the common inlet hose 11 1 are interconnected, so that leakage water, which occurs during operation of the dishwasher 1 in the water supply device 5 over the housing-fixed connector 12 is passed into the interior of the dishwasher 1. Here it can be detected by a leak water sensor, not shown, so that appropriate measures, such as closing the hot water valve 6 and cold water valve 8, can be initiated.

Downstream of the housing-fixed connection piece 12, a free flow path 13 is provided in the dishwasher 1 (see FIG. 2). In the free flow path 13 is a so-called pipe interruption, which serves to prevent a sucking back of water from the dishwasher 1, if in the external water supply by dynamic processes, a negative pressure. This prevents in particular that already used water, which may be mixed with dirt, cleaning agents and / or cleaning aids, salt or other additives, gets back into the building water supply.

The dishwasher 1 also has components not shown in FIG. 1, which make it possible to direct hot water and / or cold water from the outlet of the free flow path 13 into the washing container 2.

In a lower region of the washing container 2, a pump pot 16 is provided, in which a circulating pump is suitably provided for circulating water in the washing container 2 during a rinse cycle. In this case, the circulation pump may have a heating device for heating the water located in the washing container 2, for example a water heater. Similarly, in the sump 16, a pump for pumping out water, for example, at the end of a Spülgan- ges, be provided. However, the various pumping functions can also be perceived by a single pump in conjunction with switchable valves. The sump 16 is usually connected to a waste water connection piece 17 via means not shown so that water from the washing compartment 2 via a connected to the wastewater connection piece 17 sewage hose 18 in a building side installed wastewater A, such as a sewer pipe A, can be pumped.

In Figure 1, the hot water inlet 6, 7 of the dishwasher 1 is intended to the external hot water supply WH, which is supplied by a thermal solar system TSA with hot water partially or completely connected. The thermal solar system TSA comprises a large number of solar collectors SOK, of which only one is shown for reasons of space. The solar collectors SOK each have an absorber surface, not shown, which can be heated by the electromagnetic solar radiation. From there, the heat can be transported by means of a fluid to a heat exchanger WT, which generates the hot water for the hot water supply WH.

In order to be able to provide sufficient hot water in situations in which the heat energy provided by the solar panels is insufficient, the solar system has a conventional auxiliary heating ZH, for example a gas or oil heater, which can also supply heat to the heat exchanger WT.

The dishwasher 1 also has the sequence control device 19 for controlling the course of a rinse cycle after a rinse program. In this case, the sequence control device has a first operating mode, in which one or more rinsing programs can be called, which at least partially envisage a use of hot water from the hot water supply WH during a rinse cycle. Furthermore, the flow control device has a second operating mode, in which one or more washing programs can be called, which only provide for a rinse cycle use of cold water from the cold water supply KH. The sequence control device 19 is connected to an operating device 20, which is arranged on a control panel of the door 3 of the washing compartment 2. The flow control device 19 itself is arranged inside the door 3. However, both could also be arranged elsewhere on the dishwasher 1. Thus, the flow control device 19 may be provided in particular in the bottom assembly BG below the washing compartment. The operating device makes it possible to manually set the desired operating mode for the operator and to manually select an individual program available in the selected operating mode. Optionally, the dishwasher 1 has a data interface 20a, which is provided for receiving operating data of the hot water supply WH. For this purpose, it can be connected via a data line, for example with a controller of the solar thermal system TSA. Such a data line is designated DL1 in FIG. The data interface 20a is furthermore connected to the sequence control device 19 via a data line DL2, wherein the sequence control device 19 is designed to automatically select the mode based on the received operating data. For example, it is possible for the dishwasher 1 to automatically switch to the second operating mode if the power of the solar collectors SOK falls below a certain limit value. It is also possible to automatically control the operating mode as a function of the temperature in the heat exchanger WT. It can also be provided that is automatically changed to the second mode when the auxiliary heater ZH is turned on. The control of the valves 6, 8 for metering the amounts of incoming hot water and / or cold water according to the respective operating mode and / or generally expressed states of the hot water supply, in particular solar thermal system TSA is carried out via corresponding signal lines DL4, DL5 of the flow control device 19.

Figure 2 shows a block diagram of the dishwasher of Figure 1. The hot water valve 6 and the cold water valve 8 are each connected via the data lines DL5, DL6 with the flow control device 19, that both are individually controlled. This makes it possible to feed the washing container 2 of the dishwasher 1 via the device-side mounted Y-connector 5, the device-internal free flow path 13 and an inlet 21 specifically with hot water and / or cold water. In the sump 16 of the washing container 2, a heating pump 22 designed as a circulation pump 22 is arranged, which is in communication with a arranged in the interior of the washing container 2 spray system 23. This makes it possible to apply in the washing container 2 arranged items to be washed during a wash with water to clean this. Furthermore, a drain pump 24 is arranged in the sump, which makes it possible to pump out no longer needed water to the outside. In the case of the heating pump 22, both the heating function and the pumping function can be individually controlled by the sequence control device 19. Furthermore, the flow control device 19 is also connected to the drain pump 24 for the control thereof. The adjustment of these components of the dishwasher 1 via at least one data or signal line DL3 from the flow control device 19 from.

The operating device 20 is connected to the sequence control device 19 via at least one data line DL6 such that operating commands can be transmitted from the operating device 20 to the sequence control device 19. Furthermore, the data interface 20a is connected to the sequence control device 19 via the at least one data line DL2 such that the operating data of the thermal solar system TSA received by the data interface 20a can be transmitted from the data interface 20a to the sequence control device 19.

The feeding of the dishwasher 1 with water takes place just like the control of the heating pump 22 and the drain pump 24 as well as other devices of the dishwasher 1, not explained here, as a function of a selected washing program. The rinse programs are stored in the flow control device 19, wherein depending on the set operating mode different rinse programs can be called. At least one rinsing program is provided in the first operating mode, which is specifically selectable for the efficient use of solar thermal heated water.

FIG. 3 shows an exemplary washing program SP1 of the inventive dishwasher 1 of FIGS. 1 and 2, which can be selected in the first operating mode. The rinse program SP1 is intended to be a drain of a To control rinse when the hot water inlet device 6, 7 of the dishwasher 1 is supplied with solar thermal generated hot water from the thermal solar system TSA.

FIG. 3 shows on a common time axis t the curves SWV, SKV, BAP and BSB which indicate switching or operating states of components of the dishwasher 1 on the vertical axis Z.

The curve SWV represents the switching state of the hot water valve 6 of the dishwasher 1. Furthermore, the curve SKV shows the switching state of the cold water valve 8 of the dishwasher 1. The switching state "0" corresponds in each case a closed valve 6, 8, the switching state "1" an open Valve 6, 8. The curve BAP continues to represent the operating state of the sewage pump 24, wherein the off state is symbolized by "0" and the on state by "1". Finally, the curve BSB shows the charging state of the washing container 2 with water. Here, a with hot water from the hot water supply WH charged rinse tank 2 with "WW", a supplied with cold water from the cold water supply KH washing tank 2 with "KW" and an empty washing container 2 by "0".

FIG. 3 shows, by way of example, a rinsing program SP1, which in this sequence comprises a pre-rinsing step VS, a cleaning step RS, an intermediate rinsing step ZS, a rinsing step KS and a drying step TS. It is therefore a typical normal rinsing program SP1, which is intended for cleaning normally soiled items. In other examples, one or more of these steps might be hidden. Also examples would be possible in which one or more steps are repeated several times.

The first pre-rinsing step VS serves to remove coarse contaminants from the dishes so as to prepare the cleaning step RS. For this purpose, the cold water valve 8 is opened at the beginning of Vorspülschritts VS until the washing container 2 is charged with a sufficient amount of cold water from the cold water supply KH. This cold water is by means of the circulation pump 22 for a predetermined time, usually without switching on their heating device, circulated so as to pressurize the dishes with cold water. Thereafter, the now contaminated cold water is pumped out by means of the drain pump 24 to the outside.

The use of cold water from the cold water supply KH during the pre-rinse step VS is possible without any problems since the removal of the coarser dirt essentially takes place mechanically, so that high temperatures during the pre-rinse step can be dispensed with in many cases. Thus, a reheating by means of the heating device of the circulation pump 22 can be omitted or carried out with a low electrical energy input. At the same time, the amount of heat removed from the hot water supply WH can thus be reduced, without the cleaning result being appreciably worsened.

The subsequent cleaning step RS is used to thoroughly clean the dishes. For this purpose, the hot water valve 6 is opened at the beginning of the cleaning step RS until the washing container 2 is charged with a sufficient amount of hot water from the hot water supply WH. The filled in the washing tank 2 hot water is now circulated by means of the heat pump 22 for a predetermined time, so as to pressurize the dishes with hot water. In this case, the heating device of the circulation pump 22 can be switched as needed as a function of the temperature of the supplied hot water and in dependence on the intended rinse temperature of the cleaning step RS. At the conclusion of the cleaning step RS, the now polluted hot water is pumped out by means of the drain pump 24 to the outside.

During the cleaning step RS, it is usually necessary to apply water to the wash ware, which has a comparatively high temperature in order to achieve a high thermal cleaning effect. In addition, water is generally added to the detergent whose chemical cleaning action is best at a higher temperature. Usually, therefore, a temperature of about 50 ⁰ C to 70 ⁰ C is provided for a cleaning step RS. When using hot water from the thermal solar system TSA for the cleaning step RS so it is ensured that the extracted solar energy TSA heat energy is used meaningfully. Here, a high level of savings can be achieved in electrical energy, since the hot water from the solar thermal system TSA in many cases not at all, in other cases only to a small extent, must be reheated by the electric heater of the circulation pump 22 of the dishwasher 1 to reach the required temperature.

The now performed intermediate rinse step ZS for removing detergent from the items to be washed after the cleaning step RS also provides a loading of the washing container 2 with cold water from the cold water supply KH before to be able to apply the wash ware with cold water. For this purpose, first the cold water valve 8 is opened until the washing container 2 is charged with a sufficient amount of cold water for the intermediate rinsing step ZS. This cold water is circulated by means of the circulation pump 22 for a predetermined time, which as a rule can be omitted connecting their heating device. Thereafter, the now contaminated cold water is pumped out by means of the drain pump 24 to the outside.

As a rule, no higher temperatures are required during the intermediate rinsing step ZS, so that cold water from the cold water supply can also be used in the intermediate rinsing step ZS without this having to be heated by the heating pump 22 with a higher electrical energy input. At the same time, the amount of heat removed from the hot water supply WH can be further reduced without the cleaning result being impaired.

In the now subsequent rinse step KS, a loading of items to be washed with hot water from the hot water supply WH is provided. For this purpose, the hot water valve 6 is first opened again until the washing container 2 is charged with a sufficient amount of hot water from the hot water supply WH for the final rinse step KS. The filled in the washing container 2 hot water is now circulated by means of the circulation pump 22 for a predetermined time, so as to pressurize the dishes with hot water. During the rinsing step KS, too, the heating device of the circulating pump 22 can be switched on as required as a function of the temperature of the hot water supplied and as a function of its intended rinsing temperature. At the end of the rinsing step KS, the now polluted hot water is pumped by means of the drain pump 24 to the outside.

A rinse step KS is used in particular to avoid stains on the dishes, which could be caused by dissolved substances in the water, such as salt and / or lime. For this purpose, the water is added during the rinse step KS with rinse aid. Another object of the rinsing step KS is to prepare a subsequent drying step TS. Thus, the dishes are heated by hot water in particular, comprising, for example, a temperature of 60 ⁰ C to 75 ° C, is used during the rinsing step KS. As a result, water droplets adhering to the hot dishes evaporate in the subsequent drying step TS and precipitate on the inside of the washing container 2 due to the lower temperature prevailing there. When using hot water from the solar system TSA for the rinse step KS is therefore also ensured that the solar energy TSA extracted heat energy is used meaningfully. Again, a high saving in electrical energy can be achieved because the hot water from the solar system TSA in many cases not at all, in other cases only to a small extent, must be reheated by the electric heater 22 of the dishwasher 1 to those for the final rinse step KS required temperature to reach.

During the final drying step TS, a feeding of the washing container 2 with water is not provided.

FIG. 4 shows an exemplary washing program SP2 of the dishwasher 1 of FIGS. 1 and 2, which can be selected in the second operating mode. The wash program SP2 is intended to control a wash cycle when the hot water supply WH is supplied with hot water generated by the auxiliary heater ZH.

The rinsing program SP2 is likewise a normal rinsing program SP2, which corresponds to the normal rinsing program SP1 described above in such a way that it has a substantially identical cleaning and drying action. The difference is that the wash program SP2 only provides for the use of cold water from the cold water supply KH. This avoids that the hot water supply WH heat energy is withdrawn, for example, if the solar panels SOK supply too little heat energy. In program steps RS, KS, in which it is necessary or desirable to pressurize the washware with water at a higher temperature, ie in particular in the cleaning step RS and in the final rinse step KS, the water provided for acting on the washware by means of the heater, in particular the water heater of the circulation pump 22 are heated. The additional costs for the electrical energy required for this are in many cases lower than the additional costs which would be incurred if the additional heating ZH of the solar thermal system TSA had to be switched on due to an additional hot water withdrawal.

In summary, the flow control device controls the hot water valve and the cold water valve in an advantageous manner so that in a first mode for at least one program step at least one wash program the hot water valve for supplying hot water from the hot water supply and the closed cold water valve is durable, and that in a second Operating mode for at least one program step of at least one wash program the cold water valve for supplying cold water from the cold water supply apparently and the hot water valve is closed durable. In addition, the hot water valve for supplying hot water from the hot water supply and additionally, in particular simultaneously, the cold water valve for supplying cold water from the cold water supply may be apparent by the flow control device in a third mode for at least one program step at least one program for mixing hot water and cold water.

By means of these automated control methods by means of the sequence control device, the energy-efficient operation of the dishwasher according to the invention is convenient and simple for an operator. An advantageous embodiment of the dishwasher according to the invention has at least one additional function key for the selection of hot water reference from a hot water solar system. In this case, two water connections are expediently provided which can be controlled separately with one Aquastop valve each. One water connection is provided for warm inexpensive solar water, the other water connection for cold water from the mains. Both water connections can be individually selected via a control unit of the dishwasher, ie a bithermic water connection which can be controlled specifically with regard to "hot water" and "cold water." After the two valves, the water then flows in a hose via a Y-piece mounted in the device Water inlet system of the dishwasher.

On this basis, the dishwasher has now received an additional function key (solar button), which can be arranged on the panel. When this button is pressed, special flushing sequences can be activated in the control unit, which are designed for the hot water of a hot water solar system.

The manual selection can be omitted if the dishwasher z. B. by data transmission the information is transmitted, in which way - solar or e.g. with heating oil - just heated.

The goal of these special programs is to keep the rinsing and drying performance constant at the lowest energy consumption, without the operator having to remember to reconnect the water supply.

The dishwasher can now respond to this change by pressing the auxiliary function button in various ways to achieve the goal of getting as good energy-saving good rinsing and drying performance. The customer can even in the summer months in bad weather or at the transition to the winter months change its dishwasher by pressing a button on cold water operation, when the hot water solar system too little energy is fed into the hot water tank of the hot water supply. In summary, it may therefore be particularly expedient if an operating device of the dishwasher is provided with an extra function key or additional function key for the manual selection of the various operating modes. In particular, it is advantageous if an additional function key for the targeted selection of hot water reference from the hot water supply, in particular of hot water from a hot water solar system is provided. In FIG. 1, such an additional function key is identified by 30 in the control panel of the operating device 20.

Alternatively, the selection of the respective operating mode can be carried out by the sequence control device itself. Thus, it can in particular via corresponding sensors, in particular temperature sensors, e.g. in the hot water supply line section and cold water supply line section of the Y-connection section and / or the hot water valve and cold water valve draw conclusions about the given connection conditions.

In particular, a data interface such as e.g. 20a for receiving operating data of the external hot water supply, which is at least partially fed in particular by a solar thermal system, be provided. The sequence control device is expediently designed for the automatic selection of the respective operating mode on the basis of the received operating data. In this way, the flow control device can independently recognize whether, e.g. a solar thermal system can provide a contribution to hot water for carrying out at least one program step of a dishwashing program to be started.

Generally speaking, the sequence control device of the dishwasher has a first operating mode in which at least one rinsing program can be called, which provides for the use of hot water from the external hot water supply in at least one rinsing program step, a second operating mode in which at least one rinsing program can be called, which at least one Rinse program step exclusively one Use of cold water from the external cold water supply provides, and / or a third mode in which at least one wash program can be called, which at least one rinse program step, the mixing of hot water from the external hot water supply with cold water from the external cold water supply provides.

For this purpose, in particular the Y-connector is provided. In particular, it may be fixed to the device, preferably provided internally or externally, i. be provided outside the dishwasher. The respective inlet of the hot water and / or cold water can be controlled in each case by means of a controllable valve in the two inlet-side feeder branches of the Y-connector or in the inlet hoses connected to this inlet side using the flow control device.

Instead of the Y-connector, another shaped connecting piece may be expedient, which also allows a branching of two separate water outlets, in particular from a hot water inlet and from a cold water inlet, to a common outlet piece.

In particular, it may be appropriate, instead of or in addition to the solar thermal system for providing a cost domestic hot water supply a modern condensing boiler such as a Pelletofen-, wood chips, or Holzscheitheizung, a combined heat and power plant, geothermal heat pump, air heat pump system, a district heating system or a local heating system, individually or in any combination, etc to use. In particular, the combination of, for example, a pellet stove with a thermal solar system can be energetically advantageous. In particular, other hot water supply systems, which manage without or only with relatively low primary energy demand of fossil fuel carriers or use only largely CO ₂ neutral energy sources. The explanations given in the case of a solar thermal hot water generation system apply in the presence or presence of another hot water supply system with regard to the Training and control of the dishwasher according to the invention in an analogous manner.

LIST OF REFERENCE NUMBERS

1 dishwasher

2 rinse tanks

3 door

4 housing

5 Y-connector

6 hot water valve

7 hot water supply line section

8 cold water valve

9 cold water supply line section

10 connector

1 11 inlet hose

12 housing-fixed connection piece

13 free flow path

16 pump pot

17 wastewater connection piece

18 sewage hose

19 flow control device

20 operating device

20a interface

21 process

22 Circulation pump with instantaneous water heater

23 spraying device

24 drain pump, sewage pump

30 additional function key

131, 132 device-side water inlet device

500 total water inlet device

A sewage pipe

BG floor assembly

KH cold water supply, cold water tap

WH hot water supply, hot water tap

TSA thermal solar system

SOK solar panel WT heat exchanger

ZH additional heating

SP1 wash program of the first operating mode

SWV Switching state of the hot water valve

SKV Switching state of the cold water valve

BAP Operating status of waste water pump

BOD filling status of the washing container

VS pre-rinse step

RS cleaning step

ZS intermediate rinse step

KS rinse step

TS drying step

SP2 washing program of the second operating mode

Claims

claims

1. Dishwasher (1), in particular domestic dishwasher, with a water inlet device (500), which has a hot water inlet (6, 7) and a cold water inlet (8, 9), wherein the hot water inlet (6, 7) for receiving hot water from an external Hot water supply (WH) and the cold water inlet (8, 9) for receiving cold water from an external cold water supply (KH) is provided, and with a flow control device (19) for controlling at least one rinse cycle for cleaning items to be washed, characterized in that the flow control device ( 19) for automatic selection of hot water reference from the external hot water supply (WH) or for manual selection of hot water reference from the external hot water supply (WH) by means of at least one operating device (20), in particular additional function key (30) is formed.

2. Dishwasher according to claim 1, characterized in that the flow control device (19) is designed such that the hot water reference from the external hot water supply (WH) by the flow control device (19) is then provided partially or completely, if this energy-efficient than the self-heating means the device's own heating device (22) of the dishwasher (1).

3. Dishwasher according to one of claims 1 or 2, characterized in that the external hot water supply (WH) is partially or completely fed by a thermal solar system (TSA).

4. Dishwasher according to at least one of the preceding claims, characterized in that the flow control device (19) has a first operating mode in which at least one washing program (SP1) can be called, which at least one rinsing program step, a use of hot water from the external hot water supply (WH ) provides that the sequence control device (19) has a second mode of operation, in which at least one rinsing program (SP2) can be called, which exclusively provides for the use of cold water from the external cold water supply (KH) in at least one rinsing program step, and / or in that the sequence control device (19) has a third operating mode in which at least one rinsing program ( SP1) can be called, which in at least one rinsing program step, the mixing of hot water from the external hot water supply (WH) with cold water from the external cold water supply (KH) provides.

5. Dishwasher according to at least one of the preceding claims, characterized in that the hot water inlet (6, 7) a hot water valve (6) and the cold water inlet (8, 9) comprises a cold water valve (8), wherein the hot water valve (6) and the cold water valve (8) are independently controllable by the flow control device (19).

6. Dishwasher according to claim 5, characterized in that the hot water valve (6) at an upstream end of a hot water hose (7) is arranged and adapted to be fastened to a fitting, in particular faucet, the external hot water supply (WH) , and / or that the cold water valve (8) at an upstream end of a cold water hose (9) is arranged and adapted to be fastened to a connector, in particular faucet, the external cold water supply (KH).

7. Dishwasher according to claim 6, characterized in that a downstream end of the hot water hose (7) and a downstream end of the cold water hose (9) with a connecting piece (5), in particular Y-connector, are liquid-conducting connected.

8. Dishwasher according to claim 7, characterized in that the connecting piece (5) outside the dishwasher (1) is provided free-hanging on the hot water hose (7) and the cold water hose (9), and that the connecting piece (5) via an external inlet hose (11 1) with the device-side water inlet device (131, 132) of the dishwasher (1) is connected.

9. Dishwasher according to claim 7, characterized in that the connecting piece (5) on the device-side water inlet device (131) on the device side, in particular device inside, is attached.

10. Dishwasher according to claim 9, characterized in that the connecting piece (5) on the washing compartment (2) of the dishwasher (1) or on or in the base assembly (BG) of the dishwasher (1), in particular stationary, is provided.

1 1. Dishwasher according to at least one of claims 5 to 10, characterized in that the flow control device (19) controls the hot water valve (6) and the cold water valve (8) such that in a first mode for at least one program step at least one washing program (SP1 ) the hot water valve (6) for supplying hot water from the hot water supply (WH) apparently and the cold water valve (8) is kept closed, that in a second mode for at least one program step at least one wash program (SP2) the cold water valve (8) for supplying Cold water from the cold water supply (KH) apparently and the hot water valve (6) is kept closed, and / or that in a third mode for at least one program step at least one program for mixing hot water and cold water, the hot water valve (6) for supplying hot water from the Hot water supply (WH) and in addition the cold Water valve (8) for supplying cold water from the cold water supply (KH) is apparent.

12. Dishwasher according to at least one of the preceding claims, characterized in that a data interface (20a) for receiving operating data of the external hot water supply (WH), which at least partially in particular by a solar thermal system (TSA) is fed, and that the Sequence control device (19) for automatic selection of the respective operating mode based on the received operating data is formed.

13. A method for controlling a dishwasher (1), in particular domestic dishwasher, with a water inlet device (500) having a hot water inlet (6, 7) and a cold water inlet (8, 9), wherein the hot water inlet (6, 7) for receiving Hot water from an external hot water supply (WH) and the cold water inlet (8, 9) for receiving cold water from an external cold water supply (KH) is provided, and with a flow control device (19) for controlling at least one rinse for cleaning items to be washed, especially after at least one of the preceding claims, characterized in that by means of the flow control device (19) of the hot water reference from the external hot water supply (WH) is automatically selected, or the hot water reference from the external hot water supply (WH) by means of at least one operating device (20), in particular additional function key (30 ), manually selected by an operator.