ES2712660A1 - DOMESTIC APPLIANCE WITH A WATER TANK (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

The present invention refers to a domestic appliance (1) with a water tank (6) configured to be connected to a water supply, and with a washing chamber (2) in which water can be introduced from the water tank (6) The water tank (6) has at least two chambers (7, 8). A first chamber (7) of the two chambers (7, 8) has a first inlet (9) configured to be connected to the water supply and a first outlet (10) to provide water to the washing chamber (2) during a first phase of a washing program of the domestic appliance (1). A second chamber (8) of the two chambers (7, 8) has a second inlet (13) configured to be connected to the water supply and a second outlet (14) to provide water to the washing chamber (2) during a second phase of the washing program. (Machine-translation by Google Translate, not legally binding)

Description

DOMESTIC APPLIANCE WITH A WATER TANK

DESCRIPTION

The present invention refers to a domestic appliance with a water tank, which is configured to be connected to a water supply. Water from the water tank can be introduced into a washing chamber of the domestic appliance.

Energy consumption is one of the key factors or issues that influence the user's decision to buy household appliances such as washing machines or dishwashing machines. As a result, manufacturers of household appliances are working in various ways to reduce energy consumption and to improve the energy efficiency of household appliances.

A possible way to reduce the energy consumption of a domestic appliance that can be connected to a tap water is to provide a water tank that stores water from the external outlet of running water. Running water is stored inside the water tank. The water tank is arranged upstream of a washing chamber of the domestic appliance and absorbs heat from the ambient air inside the room in which the domestic appliance is disposed. Since the ambient temperature is usually above the temperature of the cold running water, the water tank can provide input water to the washing chamber having a higher temperature with respect to the temperature of the cold running water. This increase in the temperature of the inlet water at ambient air temperature is not accompanied by a consumption of electrical energy by the domestic appliance.

By way of example, in document FR 2 836 937 A1, a washing machine is disclosed with an internal water tank for storing running water, which is then supplied to a washing tank of the washing machine.

The ambient temperature of the dwellings is usually between 20 ° C and 25 ° C, while the temperature of the running water is usually between 5 ° C and 15 ° C, depending on the country and the season of the year. Therefore, if a program selected by the user is a program of a domestic appliance in which the water is heated up to 60 ° C, the water used in the program only has to be heated between 35 ° C and 40 ° C, instead of between 45 ° C and 55 ° C. Expressed differently, the water temperature stored inside the water tank is between 10 ° C and 15 ° C higher than the temperature of the running water. Therefore, the provision of the water tank results in saving energy or decreasing energy consumption of the domestic appliance.

Also, the washing chamber, which can be configured as a washing tank in the case of a washing machine as a domestic appliance, receives clean water from the water tank and not reused water, which may contain residues of detergent, softener, or other possible additives that the user of the domestic appliance uses for a washing cycle or washing program.

A washing program of the domestic appliance can comprise different phases. If the household appliance is configured as a washing machine, these phases can be a prewash phase, a washing phase, a rinse phase, and a spinning phase, for example. However, the water only has to be heated during the washing phase. Therefore, it can happen that the water that is stored in the water tank and that has been previously heated to room temperature, in particular, to the ambient air temperature, is used during a phase of the washing program in which the water does not have to be heated. As an example, water from the water tank can be used during the prewash phase. In this case, energy savings can not be achieved nor can the energy efficiency of the household appliance be improved. This is due to the fact that in this case there is not available preheated water when this is necessary, that is, in the washing phase during which heated water is used in the washing chamber of the domestic appliance. Put another way, if preheated water has been used during a phase during which no heated water is needed, preheated water is not available when it is needed.

The present invention solves the technical problem of providing a domestic appliance of the type mentioned at the beginning, which is improved with respect to energy saving.

This technical problem is solved by the domestic appliance with the features of claim 1. In the dependent claims, advantageous configurations are specified with other convenient developments of the invention.

The domestic appliance according to the invention has a water tank that is configured to be connected to a water supply. Water from the water tank can be introduced into a washing chamber of the domestic appliance. The water tank has at least two cameras. A first chamber of the two chambers has a first inlet configured to be connected to the water supply and a first outlet to supply water to the washing chamber during a first phase of a washing program of the domestic appliance. A second chamber of the two chambers has a second inlet configured to be connected to the water supply and a second outlet to provide water to the washing chamber during a second phase of the washing program. In the wash program, the first phase is carried out before the second phase. Therefore, if only water that needs to be heated to a temperature above ambient air temperature is needed during the second phase of the washing program, this water can be taken from the second chamber of the water tank.

Therefore, it can be achieved that during the second phase, cold running water from the water supply is not introduced into the washing chamber. This ensures that during the second phase a maximum volume of preheated water, ie, water from the water tank, can be used. As it is reduced, in particular, the amount of cold running water that is introduced into the washing chamber of the domestic appliance is reduced to zero, the energy saving of the domestic appliance is improved. Consequently, it is improved, in particular, the energy efficiency of the domestic appliance is maximized.

The first phase can be a prewash phase of the washing program during which no heated water is needed. The second phase can be a washing phase of the washing program during which water heated above the room temperature in the washing chamber is used.

Preferably, the storage volume for the water of the first chamber is less than the storage volume for the water of the second chamber. This is due to the fact that during a first phase of the washing program, which is a prewash phase, less water is needed than during a second phase, which is a washing phase. By way of example, if the domestic appliance is configured as a washing machine, between 5 liters and 12 liters of water may be needed during the prewash phase. This depends on the amount of laundry that can be introduced into the washing chamber, for example, 5 kg of clothing, 6 kg of clothing, 7 kg of clothing, 8 kg of clothing, 9 kg of clothing, 10 kg of laundry. clothes, 11 kg of clothes, etc. For these devices, the amount of water used during the washing phase can be between 10 liters and 22 liters.

However, if the domestic appliance has a washing program that requires a greater amount of water during the first phase, in particular, the prewash phase, that during the second phase, in particular, the washing phase, the storage volume of the first chamber may be greater than the storage volume of the second chamber.

Preferably, the water tank has at least one valve element configured to allow the flow of water from the first chamber to the second chamber and / or from the second chamber to the first chamber, depending on the pressure difference between the chamber and the chamber. first camera and the second camera. The valve element prevents the increase of the pressure in at least one of the two chambers in the event that one of the outputs is blocked. Expressed in another way, the water tank is not subjected to pressure above a threshold value in which the valve element is opened.

This is based on the discovery that if one of the exits is blocked, for example, by dirt, dust, lint, small objects, or the like, the water contained in the water tank can be subjected to pressure. However, if the at least one valve element is provided, such an increase in pressure can be avoided or, at least, limited. In particular, the first chamber and / or the second chamber of the water tank can be prevented from exploding or suffering damage as a result of an increase in pressure. Therefore, the water tank can be made of a material less resistant to pressure and, in spite of this, an undesirable increase in the pressure of the water tank can be prevented, even if the tank outlet of water is blocked.

There may be a first valve element, such as a retention valve, which allows the flow of water from the first chamber to the second chamber. There may also be a second valve element, such as a retention valve, which allows the flow of water from the second chamber to the first chamber. This is a particularly simple disposition.

Preferably, the at least one valve element is arranged in a wall of the water tank, where the wall separates the first chamber from the second chamber. This makes it possible to produce an immediate equalization of the pressure in the event that one of the outputs is blocked.

Preferably, the at least one valve element has a closing element that can be moved from a closing position to an opening position. In the closing position, the closing element is maintained in an opening provided in the wall of the water tank. The closing element is held in the opening by a first spring element arranged in the first chamber and by a second spring element arranged in the second chamber. Therefore, a very compact valve element makes possible the flow of water from the first chamber to the second chamber. In this case, the spring element of the second chamber is compressed to a greater extent than in the case where the closing element is in the closed position. When the closing element is in the open position, the closing element does not block the opening provided in the wall.

On the other hand, if the first spring element is compressed to a greater extent than in the case where the closure element is held in the closing position, water flow from the second chamber to the first chamber is allowed. In this case, the closing element, which can be a ball or a sphere, is moved from the closing position to the opening position. This double valve element is a particularly compact device for a pressure compensation between the two fast and safe chambers.

The domestic appliance can be configured as a washing machine or a dishwasher. In both cases, it is advantageous that water is supplied from the second chamber to the washing chamber, which is configured as a washing tank in the case of the washing machine and as a compartment for the dishes in the case of the dishwasher, during the second phase.

Preferably, the first phase can be a prewash phase and the second phase can be a washing phase during which water is introduced from the second chamber to the washing chamber with a temperature above the temperature of the water used during the prewash phase. In this way, it is ensured that during the washing phase the water has to be heated much less than if cold running water were introduced directly into the washing chamber.

Preferably, the first chamber and / or the second chamber have multiple flow guiding elements, which define a serpentine flow path for water in at least one section of the first inlet to the first outlet and / or the Second entry to the second exit. By means of this serpentine flow path, a very good heat transfer of the flow elements to the water can be achieved. Also, the period of time during which the water flows through the first chamber and / or the second chamber increases. This increases the efficiency of water tank when preheating the cold running water, in particular, through the ambient air.

Preferably, the household appliance has a detergent drawer with a first compartment for the detergent to be used during the first stage and with a second compartment for the detergent to be used during the second stage. Here, the first outlet is connected to a first inlet tube configured to drag the detergent from the first compartment. The second outlet is connected to a second inlet tube configured to draw the detergent from the second compartment. By means of such an arrangement, water from the first chamber of the water tank can be used to discharge the detergent from the first compartment of the detergent drawer in the washing chamber, and water from the second chamber of the water tank can be used. to discharge the detergent from the second compartment of the detergent drawer in the washing chamber. Thus, the different phases of the washing program can be carried out independently from each other without the risk of wasting detergent.

Preferably, the domestic appliance has a floating element disposed in an outlet tube of the washing chamber. The floating element is configured to be moved to a closing position. In the closing position, the floating element closes an outlet of the washing chamber depending on the water level of the outlet pipe. Here, a control unit of the domestic appliance is configured to cause the flow of water through the first inlet pipe to the washing chamber in order to increase the water level of the outlet pipe. This arrangement ensures that the floating element is moved to the closing position by the water coming from the first compartment of the detergent tank. Accordingly, the entire amount of detergent disposed in the second compartment of the detergent bowl is available for the next second phase, for example, the washing phase. Expressed in another way, no detergent is wasted from the second compartment of the detergent bowl to move the floating element to the closing position. This increases the efficiency of the detergent utilization for the second phase of the washing program, in particular, the washing phase. Thus, a good washing result can be achieved.

Preferably, the detergent bowl has a third compartment for fabric softener. Here, the fabric softener can be entrained from the third compartment causing the flow of water through the first inlet pipe and the second inlet pipe simultaneously. By means of this arrangement, only two tubes have to be provided, that is, the first inlet pipe and the second inlet pipe, for dragging the detergent of the first compartment or of the second compartment, or to drag the softener of the third compartment. This reduces the complexity of the domestic appliance.

The characteristics and combinations of characteristics mentioned above in the description, as well as the characteristics and combinations of features mentioned below in the description of the figures and / or shown alone in the figures are usable not only in the combination indicated in each case, but also in other combinations or separately, without abandoning the scope of the invention. Therefore, it should be understood that those embodiments of the invention that are not shown explicitly in the figures and are not explained, but that can be extracted through combinations of features separated from the forms, are also understood and disclosed by the invention. of realization exposed, and that can be generated from these. Therefore, those forms of realization and combinations of characteristics that do not have all the characteristics of an independent re-formulation originally formulated will also be considered disclosed. Likewise, those forms of realization and combinations of characteristics that transcend or that differ from the combinations of characteristics set out in references to the claims will be considered disclosed by means of the embodiments set forth above.

Other advantages, characteristics and details of the invention can be derived from the claims, the following description of the preferred embodiments, as well as based on the drawings, in which the elements with analogous functions are accompanied by the same reference symbols. Here, they show:

Fig. 1 very schematically, a domestic appliance in the form of washing machine, where the washing machine comprises a water tank for storing the running water before it is supplied to a washing tank of the washing machine, and where the water tank comprises a first chamber and a second chamber;

Fig. 2 very schematically, a detergent bucket of the washing machine shown in figure 1;

Fig. 3 in a perspective view, components of the detergent drawer, wherein the components comprise a cover and a base part;

Fig. 4 the cover of the detergent drawer seen from a side facing the base part of figure 3;

Fig. 5 the cover of figure 4, but with a cover having multiple outputs;

Fig. 6 very schematically, the washing machine according to figure 1 while the water is extracted by pumping the washing tub;

Fig. 7 the washing machine according to figure 6, after the pumping has stopped;

Fig. 8 the washing machine according to figure 7, after water has been introduced into the washing tub;

Fig. 9 a base part of the water tank shown in figure 1, in top view;

FIG. 10 is an exploded perspective view of the water tank according to FIG. 1, showing the base part and a cover of the water tank;

Fig. 11 the water tank according to figure 10, in another perspective view;

Fig. 12 the water tank according to figure 1, in a first perspective view without the cover and in a second perspective view with the cover;

Fig. 13 another perspective view of the base part of the water tank;

Fig. 14 another perspective view of the water tank comprising the base part according to figure 13 and the cover;

Fig. 15 schematically, a water flow path through the first chamber and the second chamber of the water tank;

Fig. 16 in sectional view, a valve element provided in a wall separating the first chamber from the second chamber of the water tank; Y

Fig. 17 a perspective view of the valve element shown in figure 16.

The indications "upper", "lower", "upper part", "front part", "lower part", "floor", "horizontal", "vertical", "direction of depth", "direction of width" , "direction of the height", and the like, refer to the positions and orientations of the domestic appliance in its intended use position with respect to an observer located in front of the domestic appliance and observing it towards the latter.

Figure 1 shows very schematically a washing machine 1 as an example of a domestic appliance. However, the domestic appliance can also be configured as a dishwasher. As already known, the washing machine 1 has a washing chamber 2 in the form of a washing tub and a drum 3 that rotates inside the washing chamber 2 during a washing program of the washing machine 1. In figure 1, a control panel 4 with control buttons 5 is shown schematically, where the position and arrangement of the control panel 4 and the control buttons 5, or of devices of this type for choosing a washing program, are illustrated only of example.

The washing machine 1 has a water tank 6, which can be connected to a water supply such as a water supply (not shown). Therefore, cold running water can be introduced into the water tank 6. The tap water stored inside the water tank 6 absorbs heat from the surroundings of the water tank 6, in particular from the ambient air present within the room in the water tank. that the washing machine 1 is arranged. Accordingly, the temperature of the water stored inside the water tank 6 rises until the temperature reaches the ambient air temperature. Accordingly, the washing machine 1 has to provide less electric power to heat the water that would be used in the washing chamber 2 for washing purposes. The washing chamber 2 is arranged downstream of the water tank 6. Therefore, the provision of the water tank 6 upstream of the washing chamber 2 reduces the power consumption of the washing machine 1.

However, a washing program of the washing machine 1 may comprise a first phase such as a prewash phase and a second phase such as a washing phase. During the prewash phase, preheated water from the water tank 6 is not needed. However, during the washing phase, the water supplied from the water tank 6 to the washing chamber 2 is heated to a temperature above the temperature environment of the room in which the washing machine is located 1. Therefore, the water tank 6 is divided into a first chamber 7 and a second chamber 8. The first chamber 7 has a first entrance 9, which is configured for to be connected to the water supply, and a first outlet 10, which is connected to a first inlet pipe 11 leading to the detergent tank 12 of the washing machine 1. The detergent tank 12 is shown schematically in figure 2.

In the same way, the second chamber 8 has a second inlet 13, configured to be connected to the water supply, and a second outlet 14, which is connected to a second inlet pipe 15 of the detergent tank 12. The second pipe 15 leads from the water tank 6 to the detergent tank 12 (see Figure 2). If the washing program comprises a prewash phase, the water that has been preheated inside the first chamber 7 is supplied to the detergent bowl 12 through the first inlet tube 11 of the detergent bowl 12. Then, the water is supplied to the washing chamber 2 from the detergent drawer 12. However, during the prewash phase no water is used from the second chamber 8. Therefore, the water contained in the second chamber 8 can be used in the washing chamber 2 during the washing phase without losing preheated water. This maximizes the energy saving that can be achieved by preventing the water tank 6. The reason is that no cold running water is supplied to the washing chamber 2 during the washing phase, even if the washing program comprises the prewash phase.

The detergent bowl 12 comprises a first compartment 16 in the form of a prewash compartment (see FIG. 2). The detergent bowl 12 also comprises a second compartment 17, which is formed as a washing compartment. Also, the detergent bowl 12 comprises a third compartment 18, which is a compartment for fabric softener. If water is supplied from the first chamber 7 of the water tank 6 to the detergent bowl 12 through the first inlet tube 11, the detergent from the first compartment 16 is drawn from the first compartment 16.

If water is supplied from the second chamber 8 of the water tank 6 to the detergent bowl 12 through the second inlet tube 15, the detergent is drawn from the second compartment 17 of the detergent bowl 12. If water flows through the first inlet tube 11 and second inlet tube 15 simultaneously, the softener is entrained from third compartment 18. This is explained in more detail with reference to figures 3, 4 and 5.

Figure 3 shows that the detergent bowl 12 comprises a base part 19 with the third compartment 18 arranged between the first compartment 16 and the second compartment 17. The first inlet tube 11 and the second inlet tube 15 are provided in a cover 20 of the detergent bowl 12, which in FIG. 3 is shown separated from the base part 19.

Figure 4 shows the cover 20 on one side that is directed towards the base part 19 when the cover 20 is fixed to it. Accordingly, if water flows through the first inlet tube 11, this water is guided to a curved channel 21 provided by the cover 20. The first channel 21 is disposed for the most part above the first compartment 16. If water flows into the detergent tank 12 through the second inlet pipe 15, the water is guided to a second curved channel 22 provided by the cover 20. The second curved channel 22 is disposed for the most part above the second compartment 17.

A lid element 23 covers the two channels 21, 22 on the side of the cover 20 that is directed towards the base part 19 (see Figure 5). The cover element 23 is shown disassembled from the cover 20 in figure 5. In figure 4, a flow path 24 for the water flowing through the first channel 21 is shown schematically. Another flow path 25 of the water that flow through the second channel 22 is also shown schematically in Figure 4. The multiple openings 26 of the lid member 23 allow water to exit the respective channel 21, 22 and enter the first compartment 16 or the second compartment 17.

If water flows through the first inlet pipe 11 and the second inlet pipe 15 simultaneously, the two streams of water collide and the resulting water stream is diverted to a third channel 27, which is provided in the deck 20 above the third. compartment 18. Therefore, by utilization of the two inlet tubes 11, 15, the softener can be entrained from the third compartment 18.

This configuration of the detergent tank 12 and the inlet pipes 11, 15, which are connected to the water tank 6, is used during the washing program of the washing machine 1 as will be explained with reference to the figures 6, 7 and 8.

The washing chamber 2 has an outlet pipe 28 which originates in the lower part of the washing chamber 2. Figure 6 shows a situation in which water has been extracted from the washing chamber 2 by means of a pump 29 through of the outlet tube 28. A ball-shaped floating element 30 is arranged in the outlet tube 28. The ball 30 is shown remote from a seat 31 for the ball 30 provided in the outlet tube 28. When the ball 30 is in contact with the seat 31, the ball 30 closes the outlet pipe 28. This situation is shown in figure 8.

However, Figure 7 shows a situation in which water has been extracted by pumping water from the washing chamber 2, but the water remaining in the washing chamber 2 is not sufficient to move the ball 30 to its closing position, it is say, to a position in which the ball 30 fits the seat 31. Therefore, in the camera of washing 2 a small amount of water is introduced to raise the ball 30 to its closing position.

This water is preferably supplied to the washing chamber 2 through the first inlet pipe 11 and then through the first compartment 16 of the detergent tank 12. Asl, the detergent contained within the second compartment 17 of the detergent tank 12 it is not dragged or lost from the washing chamber 2 through the outlet tube 28. A control unit 32 of the washing machine 1 is configured to cause this flow of water to the washing chamber 2 through the first tube of the washing machine. inlet 11 to increase the water level in the outlet pipe 28. By this operation of the washing machine 1, it can be ensured that the detergent contained within the second compartment 17 of the detergent tank 12 is not drawn from the washing chamber 2 before the ball 30 has reached its closing position.

Figure 9 shows a base part 33 in the shape of a tray of the water tank 6. As can be seen well in Figure 9, the first camera 7 and the second camera 8 each have multiple flow control elements 34, which define a serpentine flow path for the water from the first inlet 9 to the first outlet 10 and from the second inlet 13 to the second outlet 14, respectively. Also, in Figure 9 it can be seen that the first camera 7 and the second camera 8 are separated by a wall 35.

Figure 10 shows the water tank 6 with the first chamber 7 and the second chamber 8 in exploded view with a cover 36 of the water tank 6 separated from the base part 33. As can be seen from figure 10, the inlets 9, 13 and the outlets 10, 14 can be provided, for example, in the cover 36.

Figure 11 shows the water tank 6 according to Figure 10 in a perspective view towards the base part 33. From this view, the tray-like or tray-like shape of the base part 33 can be observed particularly well.

Figure 12 shows the water tank 6 with the first camera 7 and the second camera 8 in another perspective view of the base part 33 (representation on the left of figure 12) and with the cover 36 covering the first camera 7 and the second camera 8 (representation to the right of figure 12). As can be seen from FIG. 12, the inputs 9, 13 and the outputs 10, 14 can also be provided in the base part 33 (see the representation on the left of FIG. 12).

Figure 13 also shows the division of the base part 33 into the first chamber 7 and the second chamber 8 through the wall 35 and the smaller size of the first chamber 7 with respect to the second chamber 8. Likewise, the guide elements of the flow 34, defining the winding flow path, can be seen well in figure 13. Figure 14 shows the base part 33 of the water tank 6 provided with the cover 36. Also the inlets 9, 13 and the outlets 10, 14 , which are formed integrally with the base part 33, can be seen well in Figure 14.

Figure 15 schematically shows the flow path from the entrance 9 to the exit 10 of the first chamber 7 and from the entrance 13 to the exit 14 of the second chamber 8. Furthermore, the wall 35 separating the two chambers 7, 8 each one is shown schematically in figure 15.

As can be seen from FIG. 16, the wall 35 has an opening 37 that is closed by a ball-shaped closure element 38, for example. In the area of the opening 37, the wall 35 has a conduit section 39 in which the sphere 38 is disposed when the opening 37 is closed by the sphere 38, that is, when the sphere 38 is in its closed position. The ball or sphere 38 is maintained in the closing position shown in Figure 16 by a first spring 40 disposed in the first chamber 7 and by a second spring 41 disposed in the second chamber 8.

The first spring 40 is in contact with the sphere 38 and a support element 42 disposed in the first chamber 7. In the same way, the second spring 41 is in contact with the sphere 38 and with a second support element 43 disposed in the second chamber 8. Between the conduit section 39 and the first support member 42, a first side wall 44 and a second side wall 45 define a channel along which the sphere 38 can be moved if it is pushed into the interior of the chamber. the first chamber 7 against the force of the first spring 40. Thus, if the sphere 38 is spaced from the conduit section 39, water can flow from the second chamber 8 to the first chamber 7 through the opening 37 provided in the wall 35

Similarly, a section between the conduit section 39 and the second support member 43 comprises a first side wall 46 and a second side wall 47. These side walls 46, 47 define a channel along which the sphere 38 if it is pushed into the second chamber 8 against the force of the second spring 41. Therefore, on the wall 35 a valve element 48 is provided in the form of a double retention valve.

Accordingly, if the first outlet 10 is blocked, the pressure is prevented from increasing inside the first chamber 7. Also, if the second outlet 14 is blocked, the pressure is prevented from increasing inside the second chamber 8. Thus, the Valve element 48 causes compensation of the pressure between the pressure of the first chamber 7 and the second chamber 8 of the water tank 6. Therefore, even if the first outlet 10 or the second outlet 14 is blocked or obstructed, the pressure inside the water tank 6 will not reach a magnitude with which the water tank 6 may explode or be damaged. As a result, water can always be supplied from the water tank 6 to the detergent basin 12 (see Figure 1).

SYMPTOMS OF R e f e r e n c y

Washing machine

Washing chamber

Drum

Control Panel

Command button

Water tank

First camera

Second camera

First entry

First exit

First entrance tube

Detergent bucket

Second entry

Second exit

Second inlet tube

First compartment

Second compartment

Third compartment

Base part

Cover

First channel

Second channel

Cap element

Flow path

Flow path

Opening

Third channel

Outlet

Bomb

Ball

Seat

Control unit

Base part

Flow guide element

Wall

Cover

Opening

Sphere

Section of duct Spring

Spring

Support element Support element Side wall Side wall Side wall Side wall Valve element

Claims (10)

Domestic appliance (1) with a water tank (6) configured to be connected to a water supply, and with a washing chamber (2) into which water can be introduced from the water tank (6), characterized because the water tank (6) has at least two chambers (7, 8), where a first chamber (7) of the two chambers (7, 8) has a first entrance (9) configured to be connected to the water supply and a first outlet (10) to provide water to the washing chamber (2) during a first phase of a washing program of the domestic appliance (1), and where a second chamber (8) of the two chambers (7, 8) ) has a second inlet (13) configured to be connected to the water supply and a second outlet (14) to provide water to the washing chamber (2) during a second phase of the washing program. Household appliance (1) according to claim 1, characterized in that the storage volume for the water of the first chamber (7) is smaller than the storage volume for the water of the second chamber (8). Household appliance (1) according to claims 1 or 2, characterized in that the water tank (6) has at least one valve element (48) configured to allow the flow of water from the first chamber (7) to the second chamber camera (8) and / or second camera (8) to the first camera (7), depending on the pressure difference between the first camera (7) and the second camera (8). Household appliance (1) according to claim 3, characterized in that the at least one valve element (48) is arranged in a wall (35) of the water tank (6), which separates the first chamber (7) from the second camera (8). Household appliance (1) according to claim 4, characterized in that the at least one valve element (48) has a closing element (38) that can be moved from a closing position to an opening position, where, in the closing position, the closing element (38) is maintained in an opening (37) provided in the wall (35) by a first spring element (40) arranged in the first chamber (7) and by a second element of spring (41) arranged in the second chamber (8). Household appliance (1) according to any one of claims 1 to 5, characterized in that the domestic appliance (1) is configured as a washing machine or a dishwashing machine and / or the first stage is a prewash phase and the second phase is a phase of washing during which is introduced from the second chamber (8) to the washing chamber (2) water with a temperature above the temperature of the water used during the prewash phase. Household appliance (1) according to any of claims 1 to 6, characterized in that the first chamber (7) and / or the second chamber (8) have multiple flow guide elements (34), which define a way of serpentine flow for the water in at least one section of the first inlet (9) to the first outlet (10) and / or of the second inlet (13) to the second outlet (14). Household appliance (1) according to any of claims 1 to 7, characterized in that the domestic appliance (1) has a detergent tank (12) with a first compartment (16) for the detergent to be used during the first phase and with a second compartment (17) for the detergent to be used during the second phase, where the first outlet (10) is connected to a first inlet tube (11) configured to drag the detergent from the first compartment (16), and where the second outlet (14) is connected to a second inlet tube (15) configured to draw the detergent from the second compartment (17). Household appliance (1) according to claim 8, characterized in that the domestic appliance (1) has a floating element (30) arranged in an outlet pipe (28) of the washing chamber (2) and configured to be moved to a closing position in which the floating element (30) closes an outlet of the washing chamber (2) depending on the water level of the outlet pipe (28), where a control unit (32) of the domestic appliance (1) ) is configured to cause the flow of water through the first inlet pipe (11) to the washing chamber (2) in order to increase the water level of the outlet pipe (28). Household appliance (1) according to claims 8 or 9, characterized in that the detergent drawer (12) has a third compartment (18) for fabric softener, where the fabric softener can be entrained from the third compartment (18) causing the flow of water through the first inlet pipe (11) and the second inlet pipe (15) simultaneously.