ES2723979A1 - Domestic dishwasher machine with heat pump arrangement. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

The present invention refers to a domestic dishwashing machine with a housing space (2) for housing washing items (3), with a liquid tank (4) disposed outside the housing space (2), which has a space inside (1) to house washing liquid, and with a heat pump arrangement, where the heat pump arrangement has an evaporator (10) to evaporate a heat carrier (34), which circulates inside the pump arrangement of heat during operation of the heat pump arrangement, where the evaporator (10) has an outer surface (5) that is arranged such that it is in contact at least in sections with the washing liquid present inside the tank of liquid (4) if the liquid tank (4) is full of washing liquid. The invention provides that the liquid tank (4) has a wall (15) that delimits outwards the interior space (1) of the liquid tank (4), which is arranged on one side of the interior space (1) opposite the accommodation space (2), that the domestic dishwasher has a side wall (28) that is arranged on one side of the interior space (1) of the liquid tank (4) opposite the accommodation space (2), that enters the mentioned wall (15) of the liquid tank (4) and the mentioned side wall (28) there is a hollow space (36) open towards the environment of the domestic dishwashing machine, so that air can enter the hollow space (36) from the environment, where the condensate (33) that forms in the hollow space (36) is expelled through the hollow space (36) by condensing moisture from the incoming air into the hollow space (36). Also, the present invention refers to a method for the operation of a domestic dishwasher machine. (Machine-translation by Google Translate, not legally binding)

Description

DOMESTIC DISHWASHER MACHINE WITH DISPOSITION OF

HEAT PUMP

The present invention refers to a domestic dishwashing machine with a housing space to house washing items, with a liquid tank disposed outside the housing space, which has an interior space to house washing liquid, and with an arrangement of heat pump, where the heat pump arrangement has an evaporator to evaporate a heat carrier, which circulates within the heat pump arrangement during operation thereof, where the evaporator has an outer surface that is disposed of such so that it is in contact at least in sections with the washing liquid present inside the liquid tank if the liquid tank is full of washing liquid.

In addition, the present invention refers to a method for the operation of a domestic dishwasher machine with a housing space to house laundry items, with a liquid tank disposed outside the housing space, which has an interior space for accommodate washing liquid, and with a heat pump arrangement, where the heat pump arrangement has an evaporator to evaporate a heat carrier, which circulates within the heat pump arrangement during operation thereof, where the The evaporator has an outer surface that is arranged so that it is in contact at least in sections with the washing liquid present inside the liquid tank if the liquid tank is filled with washing liquid.

In the state of the art, domestic dishwashing machines are known. A conventional domestic dishwashing machine executes one or several dishwashing programs, in each of which the washing operation is preferably carried out in an automated manner. The washing operation of the respective dishwashing program comprises the cleaning of the dirty washing articles by means of washing liquid in one or several partial washing operations, and the drying that ends the washing operation of the washing articles which then still they are wet, for example, crockery or cutlery. During one or several cleaning steps of a dishwashing program, the washing articles are applied washing liquid (= water, in particular, decalcified water, to which detergent and / or rinse aid) to remove dirt. To dry the washing articles, the corresponding domestic dishwashing machines have a drying system for the washing articles cleaned with liquid of washed. During the drying operation, the air absorbs the residual water or residual moisture that adheres to the cleaned laundry articles and thus dries them.

Some types of domestic dishwashing machines may be provided with a tank arrangement in which the washing liquid can be housed (also fresh water, in particular, decalcified fresh water, is called "washing liquid" below). Tank arrangement serves, for example, for the intermediate storage of the washing liquid to heat it to the temperature of the environment of the domestic dishwashing machine and, thus, save energy.It can also be advantageous if the tank arrangement is installed outside in contact thermally next to a wall, specifically a side wall, of the washing tank of the domestic dishwasher, and is filled with cold fresh water during a drying step and / or at the end of the previous polishing step of the washing program of crockery to be carried out in each case, in order to provide a cold source for a better drying of the condensation on this wall, equipped on the outside with the tank arrangement of the interior space of the washing tank of the domestic dishwasher machine.

By running a dishwashing program, the use of a heat pump arrangement in the domestic dishwasher could make it possible to save electricity.

The present invention solves the technical problem of providing an improved domestic dishwashing machine with a heat pump arrangement and a method for putting it into operation.

This technical problem is solved by a domestic dishwashing machine and a procedure with the characteristics of the independent claims.

According to the invention, it is proposed that the liquid tank has a wall that delimits out the inner space of the liquid tank, which is arranged on one side of the inner space opposite the housing space, that the domestic dishwasher has a wall side that is arranged on one side of the interior space of the liquid tank opposite the accommodation space, that between the mentioned wall of the liquid tank and the mentioned side wall there is a hollow space open towards the environment of the domestic dishwasher machine, so that ambient air can enter the hollow space, where condensate formed in the hollow space is expelled through the hollow space by condensing moisture from the incoming air into the hollow space.

In general, the liquid tank has a wall that delimits out the interior space of the liquid tank, which is arranged on one side of the interior space opposite the accommodation space. In addition, between this wall and the mentioned side wall of the domestic dishwasher machine there is a hollow space that is connected through an opening with the environment of the dishwasher machine, so that air from the machine environment can enter the hollow space domestic dishwasher The air can also leave the hollow space again through said opening or another corresponding opening.

The liquid tank is used to accommodate washing liquid in its interior space (then it is also called “washing liquid” to fresh water.) The liquid tank can be supplied with water that has previously passed through a descaling facility or another type of installation for the treatment of water, which is preferably a constituent part of the domestic dishwasher machine, where appropriate, the liquid tank can be used for intermediate storage of the washing liquid to heat it to the temperature of the environment of the machine domestic dishwasher and thus save energy, so that the washing liquid is heated inside the liquid tank by extracting heat from the air around the domestic dishwasher machine and then it can be taken to the accommodation space or a pump sump of the domestic dishwasher machine, as appropriate, and the liquid tank can be filled Do or be filled with cold fresh water, previously descaled by the installation of decalcification of the domestic dishwasher machine, during a drying step of the washing program, in order to provide a source of cold. Also in this case, the aforementioned wall of the liquid tank, that is, its outermost wall and most distant from the housing space, comes into contact with the surrounding air.

Therefore, the liquid tank serves to house washing liquid as a tank liquid, which has to be supplied to the housing chamber, in particular, to the pump sump, of the washing tank of the domestic dishwasher machine in a or more partial washing operations of the washing operation of the dishwashing program to be carried out. The liquid tank can be filled through a supply inlet with fresh water of a supply conduit, in particular, with decalcified fresh water of a descaling installation, of the domestic dishwasher. Next, the new fresh water that enters the liquid tank and / or the fresh water already stored in the liquid tank is referred to as the "liquid in the tank." In order to be able to introduce from the liquid tank into the liquid chamber. housing, in particular, in the pump sump, the desired amount of liquid from the tank, namely, fresh water, stored and / or flowing through the liquid tank, a liquid tank drain is connected as regards the fluids with the housing space, in particular with the pump sump, of the washing tank of the domestic dishwasher machine.

In any case, it is thus possible that at all times air can flow through the hollow space, so that the transmission of heat from the air and through the mentioned wall of the liquid tank to the washing liquid present in the interior space can occur of the liquid tank. Thus, the washing liquid present inside the liquid tank is heated by absorbing thermal energy from the air.

The washing liquid thus heated can in turn serve as a heat source to evaporate the heat carrier flowing through the evaporator during the operation of the heat pump arrangement, where the heat necessary for it is extracted from the washing liquid . In this way, the washing liquid is cooled.

If before washing the heat pump arrangement in the liquid tank, washing liquid, for example, fresh water, is introduced, then it can be heated through the extraction of heat from the mentioned air. If the heat pump arrangement is put into operation later to, for example, heat the washing liquid inside the housing space, then the washing liquid located inside the liquid tank has a higher temperature than if it did not take place. Preheating through the air. Therefore, during the operation of the heat pump arrangement, the washing liquid inside the liquid tank takes longer to cool to its freezing point in the case of the solution according to the invention than in the state of The technique. If the heat pump arrangement is operated only for a certain period of time, which is usually the case, then the formation of unwanted ice inside the liquid tank can be avoided or reduced.

Regardless of the exact mode of operation and the strategy of filling and emptying the liquid tank, and also regardless of whether or not a heat pump arrangement is present (the first case is preferred), through the hollow space air is flowing between the mentioned wall of the liquid tank and the mentioned side wall of the domestic dishwasher, and this is cooled by the emission of heat to the washing liquid present inside the liquid tank. In this way, the formation of condensate occurs, since the moisture present in the air condenses on the outer side of the mentioned wall, which delimits the hollow space.

According to the invention, it is now provided that this condensate is ejected through the mentioned hollow space. Therefore, the condensate does not remain in the hollow space, but, as described in more detail below, is actively diverted or accumulated so that it can be manually or automatically removed from the domestic dishwasher.

In this way, it is ensured that mold and deposits do not form mold or deposits or swell components of the domestic dishwasher in an undesired manner.

The side wall that also delimits the hollow space here ensures that the condensate does not reach the environment of the domestic dishwasher machine uncontrollably and is deposited in furniture sections or walls of the house. It is also ensured that the humidity of the air in the hollow space only condenses on the mentioned wall and possibly on the side of the side wall directed towards the hollow space. With this, condensation is excluded in furniture sections surrounding the domestic dishwasher, as opposed to the case where there is no side wall.

The side wall is preferably a metal wall, for example, of sheet metal. The side wall can be visible from the outside if the domestic dishwasher is arranged independently in the space. Thus, the side wall can form an outer boundary of the domestic dishwasher in the area of one of its sides (when looking at the front door).

If there is, the heat pump arrangement further comprises basically a heat exchanger that forms the evaporator to evaporate the heat carrier and a compressor to compress the evaporated heat carrier. The compressor compresses the carrier of gaseous heat that enters the compressor during the operation of the heat pump arrangement, where it is heated.

Also, the heat pump arrangement comprises a heat exchanger that acts as a condenser (also called a liquefactor), in which the heated gaseous heat carrier condenses again and emits heat, which can be used, for example, to heat the washing liquid present in the domestic dishwasher machine. Then, the condensed heat carrier is decompressed by means of an expansion organ (usually a throttle valve or a capillary tube), and finally returns back to the evaporator, where it passes back to the gaseous state absorbing heat to be supplied back to the compressor.

Within the scope of the invention, it is provided that the evaporator has an outer surface that is arranged so that it is in contact at least in sections with the washing liquid present inside the liquid tank if the liquid tank is filled with liquid washing During the operation of the heat pump arrangement, heat from the washing liquid in the liquid tank is transmitted to the evaporator, that is, to the heat carrier.

The surface may be the surface of a tube or plate evaporator. In addition, the evaporator can be integrated in the liquid tank so that it extends completely into the washing liquid present in the liquid tank. It can also be integrated into a wall of the liquid tank or form it.

If the heat pump arrangement is operated, for example, to heat the washing liquid circulating in the housing space by means of the condenser, then the washing liquid is cooled inside the liquid tank.

According to an advantageous improvement, the hollow space is in fluid connection with a condensate duct, through which the condensate is expellable to another area of the domestic dishwashing machine. The condensate duct preferably begins in the lower area of the hollow space and flows into the other corresponding area of the domestic dishwasher. Preferably, in the lower area of the hollow space there is a drip edge or funnel, so that the condensate flowing down can enter the condensate duct in a directed manner. The condensate duct may have a slope to a condensate outlet in the other area of the domestic dishwasher, so that the condensate automatically flows to the other area. Likewise, there may be a pumping device that is integrated in the condensate duct and with which the condensate can be transported in an active and directed manner.

According to an advantageous improvement, the condensate duct flows into a pump sump of the domestic dishwasher or in the housing space, so that the condensate is added to the washing liquid circulating in the housing space. Thus, the water consumption of the domestic dishwasher machine is reduced. Likewise, it is conceived that the condensate is taken to a collection tank that is emptied manually or whose content is also added to the washing liquid circulating in the housing space. In addition, the condensate can be diverted to an outlet of the domestic dishwashing machine, through which also the washing liquid that is no longer necessary during a washing program is discarded into a sewage drainage network.

Finally, it is also conceived that the condensate is conducted to the compressor area of the heat pump arrangement for cooling. The compressor can penetrate here in a collection tray or be integrated in a housing to which the condensate is conducible.

According to an advantageous improvement, the mentioned wall of the liquid tank and the mentioned side wall of the domestic dishwashing machine extend parallel to each other. In this case, the hollow space preferably has the shape of a parallelepiped. Both the mentioned wall and the side wall can be flat here and extend over practically the entire height and / or depth of the domestic dishwasher.

According to an advantageous improvement, the mentioned wall of the liquid tank and the mentioned side wall of the domestic dishwashing machine have a distance from each other which amounts to between 1 mm and 30 mm. Preferably, the distance is constant across the height and / or depth of the domestic dishwasher. Otherwise, the mentioned wall and / or the side wall may preferably be made of metal or plastic.

According to an advantageous improvement, the hollow space comprises several chambers that are spatially separated from each other by wings at least by sections. Therefore, the hollow space has several sections that can be joined together, for example, through openings made within the wings, or spaced apart from each other spatially. The wings preferably have a thickness between 1 mm and 3 cm.

According to an advantageous improvement, the chambers in each case have an air inlet connected to the environment of the domestic dishwasher machine and an air outlet arranged below the air inlet during the intended use of the domestic dishwasher machine and also connected to the environment of the domestic dishwasher machine, so that the air from the environment of the domestic dishwasher machine can flow through the chambers. The chambers can lead here to an air inlet and / or common air outlet. Likewise, it is possible that each chamber has its own air inlet and / or air outlet. Air flows to the chambers through the corresponding air inlet during operation of the heat pump arrangement. There, it comes into contact with the mentioned wall, condensing the humidity of the air in the wall. Simultaneously, the air is also cooled and descends down into the hollow space to finally exit the domestic dishwasher through the air outlet (s). So, the Air circulation occurs as a result of a reverse chimney effect, falling from top to bottom due to its cooling.

According to an advantageous improvement, the wings extend vertically. In this way, cameras are generated that also have a longitudinal orientation that extends vertically. The chambers should be delimited exclusively or for the most part by sections that extend vertically from the wings, from the mentioned wall of the liquid tank, and from the mentioned side wall.

The wings serve to reinforce the domestic dishwasher machine, since the hollow space cannot itself absorb forces acting laterally on the domestic dishwasher machine. Thanks to the wings, a reinforcement is achieved, so that the domestic dishwasher can be transported safely without accidentally collapsing the side wall.

According to an advantageous improvement, the wings extend between the mentioned wall of the liquid tank and the mentioned side wall of the domestic dishwashing machine. It is also conceived that the wings are a constituent part of a separate component that penetrates the intermediate space between the mentioned wall of the liquid tank and the mentioned side wall of the domestic dishwasher and is fixed through a fixation to another point. of the domestic dishwasher machine.

According to an advantageous improvement, the wings join together the mentioned wall of the liquid tank and the mentioned side wall of the domestic dishwasher machine. Thus, the wings constitute a direct connection between the mentioned sections of the domestic dishwasher machine. The wings can be, for example, glued, embedded or screwed with the sections.

According to an advantageous improvement, the wings are formed by sections of the liquid tank. In this case, the liquid tank has sections, for example, in the form of protrusions or protrusions, which extend from the mentioned wall of the liquid tank in the direction of the side wall and preferably are joined with it or are in contact with her. Likewise, it is conceived that the wings are formed by sections of the mentioned side wall of the domestic dishwashing machine and that they are preferably in contact with the mentioned wall of the liquid tank or joined with it.

According to an advantageous improvement, between the mentioned wall of the liquid tank and the side wall of the domestic dishwasher machine is arranged next from the hollow space opposite the housing space another wall section, which delimits the hollow space together with the wings and the mentioned wall of the liquid tank. Preferably, the other wall section is also a constituent part of the liquid tank. In this case, the liquid tank comprises an interior space that is delimited by the wall mentioned on the side opposite the housing space. The wall is followed by the wings, which are then joined to the other wall or transformed into it by the side of the hollow space opposite the accommodation space. Preferably, the mentioned wall, the wings, and the other wall are made in one piece, that is, the mentioned sections are not present as separate components, but are all constituent part of the liquid tank.

According to an advantageous improvement, the liquid tank comprises at least a first tank section with a supply inlet through which the liquid tank is chargeable with washing liquid. In addition, the liquid tank comprises at least a second tank section with a drain through which the washing liquid present in the liquid tank can exit the liquid tank. The drain may be an opening, a tubular connecting piece for a tube or a flexible tube, or a section of tube or flexible tube, which is connected to the liquid tank. In addition, the drain is connected as regards the fluids with the housing space or with the pump sump of the domestic dishwasher machine, so that the washing liquid present in the liquid tank can be discharged into the housing space or, Well, to the pump sump.

The first tank section and the second tank section may be connected to each other in terms of the fluids and be arranged in series as to the fluids, so that the washing liquid present in the first tank section is displaced to the second tank section if more washing liquid is introduced into the first tank section through the supply inlet.

Finally, it is provided that the evaporator, that is, the outer surface of the latter that is to be contacted with the washing liquid, extends into the first tank section.

In particular, it is advantageous if a valve that is movable at least between an opening position and a pump is integrated in the duct that extends between the drain and the housing space, or the pump sump. closing position by means of a control and / or regulator unit of the domestic dishwasher machine. Preferably, the valve is adjustable with progression continuously or gradually, so that the volumetric flow of the washing liquid that passes through the valve can be adapted (preferably depending on the progress of a washing program).

Therefore, the second tank section can be emptied by opening the valve, being advantageous here if the liquid tank, specifically, the second tank section, has an opening for pressure compensation or an air valve, to through which air can enter the second tank section if it is partially or completely emptied through the drain.

In addition, the first and second tank section constitute in each case a hollow space, which is surrounded or delimited by one or more walls of the liquid tank, where the hollow space of the first tank section constitutes the interior space described above. and the wall that extends to the side of the hollow space opposite the housing space constitutes said wall section of the liquid tank, on which side opposite the interior space the described condensation of the air humidity takes place. In other words, the liquid tank can therefore comprise at least two hollow spaces in the form of the two mentioned tank sections, which serve to house the washing liquid.

Therefore, the liquid tank comprises at least two tank sections, which are also connected to each other in terms of fluids. Both tank sections are arranged in series for fluids. This means that the washing liquid must first pass through the first tank section if it has to flow from the liquid tank supply inlet to the second tank section. Thus, if washing liquid is introduced into the first tank section through the supply inlet, then the washing liquid present in the first tank section is moved to the second tank section. Therefore, it is preferably only possible to fill the second tank section by filling the first tank section with washing liquid until it passes to the second tank section through an overflow. If the first tank section is filled with washing liquid to its maximum level determined by its construction, when more washing liquid is supplied to the first tank section, the amount of washing liquid entering enters the second tank section. in the first tank section through the supply inlet.

The advantage here is that both tank sections can be filled with washing liquid through a single supply inlet. Therefore, by filling only the first or both tank sections, it can be fixed in which areas of the Domestic dishwashing machine heat is emitted to the washing liquid that is in the respective tank section, or in which areas heat is removed from the washing liquid.

Likewise, the first tank section is preferably filled by activating a pump that moves the washing liquid in the direction of the supply inlet, or by opening a valve that is in the conduit that flows into the supply inlet and is connected as soon as to fluids with a fresh water supply conduit, with the pump sump, or with the housing space.

Preferably, the two tank sections are outside the housing space.

Finally, the method according to the invention for the operation of a domestic dishwasher is characterized in that the liquid tank of the domestic dishwasher has a wall that delimits out the interior space of the liquid tank, which is arranged to side of the interior space opposite the accommodation space, because the domestic dishwasher has a side wall that is arranged on one side of the interior space opposite the accommodation space, because between the mentioned wall of the liquid tank and the mentioned side wall there is a hollow space open towards the environment of the domestic dishwasher machine, so that ambient air enters the hollow space, where condensate that is formed in the hollow space is expelled through the hollow space by condensing moisture from the incoming air In the hollow space.

Therefore, the invention provides for the extraction of heat from the air around the domestic dishwasher machine, which circulates through the hollow space, where heat is supplied to the washing liquid present in the interior space of the liquid tank. In addition, the condensate that forms on the aforementioned wall is conducted specifically to a defined point of the domestic dishwasher, or accumulates at a defined point and is later discarded.

According to an advantageous improvement, the condensate is expelled to a pump sump of the domestic dishwashing machine, to the housing space, to a collection tank, to an outlet, or to the area of a compressor of the heat pump arrangement for cooling the compressor Thus, the condensate can be removed directly from the domestic dishwasher, or it can be supplied there for another use.

The domestic dishwasher machine comprises one or more of the features described above or below or shown in the figures.

In the dependent claims, further improvements of the invention are reproduced.

The embodiments and advantageous improvements of the invention explained above and / or reproduced in the dependent claims can be used here (except for, for example, in cases of univocal dependencies or incompatible alternatives) separately or also in any combination each.

The invention and its advantageous embodiments and improvements, as well as its advantages, are explained in more detail below by means of drawings representing embodiments. In each case, they show in a schematic diagram:

Figure 1 a front view on selected sections of a domestic dishwasher machine,

Figure 2 a front view on selected sections of another domestic dishwasher machine,

Figure 3 a front view on selected sections of a domestic dishwashing machine according to the invention,

Figure 4 a top view on a liquid tank and an adjacent side wall of a domestic dishwashing machine according to the invention, and

Figure 5 a top view on a liquid tank and an adjacent side wall of another domestic dishwashing machine according to the invention.

In the following figures, the corresponding parts of each other are accompanied by the same reference symbols. Here, they are only indicated with reference symbols and those components of a domestic dishwashing machine that are necessary for the understanding of the invention are explained. Obviously, the domestic dishwashing machine according to the invention can comprise other parts and construction groups.

A domestic dishwashing machine according to Figure 1 comprises several walls 27 (in the form of side walls, a rear wall, a cover wall and a floor wall) that delimit an interior accommodation space 2, which in turn serves to house the laundry articles 3. Obviously, the domestic dishwasher also comprises a frame surrounding the sections shown and a door (not shown). neither).

To accommodate the washing articles 3, in the accommodation space 2 there is, for example, one or more baskets for tableware 21. Also, there is a spraying arrangement with several spray arms 20, with which it can be applied to the washing articles 3 washing liquid (ie water or water mixed with detergent and / or rinse aid and / or impurities), for example, during a cleaning or brightening step of a washing program.

For the supply of fresh water, the domestic dishwashing machine is connected to a fresh water network not shown through a fresh water supply line 17, where a fresh water valve is integrated in the fresh water supply line 17 16 to influence the supply of fresh water. There is also an outlet 19, through which the domestic dishwashing machine is connected to a sewage drainage network not shown, and through which the dirty washing liquid can be expelled from a pump sump 14 of the machine domestic dishwasher disposed in the area of the bottom wall 27.

However, before the washing liquid is discarded through the outlet 19, it is usually conducted first in the circuit several times and applied to the washing articles 3 through the spray arrangement to remove its dirt. For this, the domestic dishwashing machine comprises a circulation pump 18, which is integrated in a conduit 22 ’that extends from the pump sump 14 to the spraying arrangement.

Also, from figure 1 it is extracted that the domestic dishwasher machine comprises a liquid tank 4, which serves to house the washing liquid. The liquid tank 4 comprises a supply inlet 7, through which fresh water enters the liquid tank 4 if the fresh water valve 16 is opened. In this case, the fresh water, that is, the liquid of washed, flows in the liquid tank 4 upwards. In addition, the liquid tank 4 comprises a drain 9, through which the washing liquid present in the liquid tank 4 can be led to the pump sump 14.

Obviously, the supply inlet 7 and / or the drain 9 can also flow into the liquid tank 4 at another point. For example, it would be conceivable that the drain 9 is arranged in the upper part of the liquid tank 4.

The volumetric flow of the washing liquid 9 exiting the drain 9 can be regulated through a drain valve 25, which can be found in a conduit 22 between the drain 9 and the pump sump 14.

In any case, it is provided that within the liquid tank 4 an evaporator 10 of a heat pump arrangement is extended, where it has an outer surface that is in contact with the washing liquid that is inside the liquid tank 4 For reasons of clarity, the other components of the heat pump arrangement are not shown (such as compressor 30, which is only shown by way of example in Figure 3, the condenser and the expansion member, which have already been described in the description above). However, these are connected as regards the fluids with the evaporator 10 through a heat carrier supply inlet 23 and a heat carrier outlet 24.

If the heat pump arrangement is now operated to heat the washing liquid inside the housing space 2, the evaporator tube 10 extracts heat from the washing liquid present in the liquid tank 4, while the carrier evaporates of heat 34 inside the evaporator 10.

In order to prevent the washing liquid present in the housing space 2 from cooling down in this stage, the liquid tank 4 can be separated from the housing space 2 through an insulation 37.

Figure 2 shows an alternative embodiment. Here, the liquid tank 4 comprises a first tank section 6 and a second tank section 8, where the two tank sections 6, 8 are connected as to the fluids through an overflow 13. If the washing liquid it reaches the overflow 13 by introducing washing liquid through the supply inlet 7, it is moved to the second tank section 8 through the overflow 13 as the washing liquid continues to enter through the supply inlet 7. Therefore, the Second tank section 8 is not filled with washing liquid directly, but through the first tank section 6.

The emptying of the liquid tank 4 occurs through the second tank section 8, that is, through the drain 9 of the tank arrangement disposed there, which is located in the lower area of the second tank section 8. Preferably, the liquid tank 4 has an opening for pressure compensation not shown in Figure 2, through which air can then flow to the second tank section 8 if it is emptied through the drain 9.

In any case, the state of the washing liquid within the second tank section 8 can now be influenced by the amount of washing liquid entering through the supply inlet 7 and / or leaving the tank arrangement a through the drain 9.

This arrangement has particular advantages if the mentioned evaporator 10 of a heat pump arrangement is integrated in the first tank section 6.

The heat transfer between the housing space 2 and, thereby, the circulating washing liquid therein, and the first tank section 6 and, thereby, the evaporator 10, can be regulated by the amount of washing liquid of the second tank section 8. If the second tank section 8 is filled with washing liquid during operation of the heat pump arrangement, then heat from the housing space 2 can be emitted through the washing liquid of the two tank sections 6, 8 to the evaporator 10 or, which is the same, to the heat carrier 34 flowing through the evaporator 10. If, on the contrary, the second tank section 8 is empty, then it acts as an insulator . In this case, the operation of the heat pump arrangement causes only the partial cooling or freezing of the washing liquid present in the first tank section 6 and the heating of the washing liquid circulating in the housing space 2.

Regardless of whether the liquid tank 4 is made as in Figure 1 or as in Figure 2, the invention provides that the liquid tank 4 has a wall 15 that delimits outwardly the inner space 1 of the liquid tank 4, which extends to one side of the interior space 1 opposite the accommodation space 2. The interior space 1 is the space inside the liquid tank 4 that can be filled with washing liquid.

In addition, there is a side wall 28 that is disposed in the area of one side of the mentioned wall 15 opposite the inner space 1 of the liquid tank 4. This is shown in the front view on selected sections of the domestic dishwashing machine according to the figure 3 and in the top views on the side wall 28 and the liquid tank 4 according to figures 4 and 5.

The mentioned figures also show that there is a hollow space between the mentioned wall 15 and the side wall 28, since the wall 15 and the side wall 28 are spaced apart from each other.

The hollow space 36 also has an upper air inlet 12 and an air outlet 26 disposed beneath it, so that the air around the domestic dishwasher can enter the hollow space 36 and leave it again.

If the liquid tank 4 is filled with cold washing liquid (for example, fresh water) or if an existing evaporator 10 is operated, the air flowing through the hollow space 36 generally has a higher temperature than the wall 15 mentioned of the liquid tank 4. In this way, condensation of the entrained moisture with the air and, with it, the formation of condensate 33 in the area of the outer side of the mentioned wall 15 occurs.

This condensate 33 can now flow down into the hollow space 36 and there, for example, reaches the area of a collection tank 29. From there, it can be supplied, for example, to the pump sump 14, to the housing space 2 , or also at the outlet 19 and, thus, can be ejected from the hollow space 36 in a directed manner. For this, there may be a condensate conduit 35 that conducts condensate 33 to the desired location.

While the hollow space 36 can be an individual free space between the mentioned wall 15 and the side wall 28, it is also conceived that the hollow space 36 is divided into individual sections.

In Figures 4 and 5, a corresponding solution is shown. As can be extracted from these top views, the hollow space 36 may be formed by several chambers 31 that are separated from each other by individual wings 32. The wings 32 themselves can be part of the liquid tank 4, which can be made, for example, of a plastic.

It is also conceived that there is another wall section 11, which is in contact with the side wall 28 and connected with the rest of the liquid tank 4 through the wings 32. Therefore, the liquid tank 4 may have channels forming the aforementioned chambers 31, so that a particularly high stability is guaranteed. In addition, the transmission of heat from the air flowing through the hollow space 36 to the side wall 28 is minimized. Therefore, the heat can be used almost completely to heat the washing liquid inside the liquid tank 4.

In the other aspects, the invention is not limited to the exemplary embodiment shown, but all combinations of the individual features described are as object of the invention, as shown or described in the claims, description and figures, and as long as a corresponding combination is possible or reasonable from a technical point of view.

Reference symbols

Inner space of the liquid tank

Accommodation space

Washing items

Liquid tank

Evaporator outer surface

First tank section

Supply Entry

Second tank section

Drain

Evaporator

Other wall section

Air entrance

Overflow

Pump sump

Wall delimiting out the inner space of the liquid tank Freshwater valve

Freshwater Supply Duct

Circulation pump

Departure

Spray arm

Crockery basket

, 22 ’Conduit

Heat carrier supply input

Heat carrier output

Drain valve

Air vent

Wall

Side wall of domestic dishwasher machine

Collection deposit

Compressor

Camera

To

Condensed

Heat carrier

Condensate duct Hollow space

Isolation

Claims (15)

1. Domestic dishwashing machine with a housing space (2) to house washing items (3), with a liquid tank (4) disposed outside the accommodation space (2), which has an interior space (1) for accommodating washing liquid, and with a heat pump arrangement, where the heat pump arrangement has an evaporator (10) to evaporate a heat carrier (34), which circulates within the heat pump arrangement during operation of the heat pump arrangement, where the evaporator (10) has an outer surface (5) that is arranged such that it is in contact at least in sections with the washing liquid present inside the liquid tank (4) if The liquid tank (4) is filled with washing liquid, characterized in that the liquid tank (4) has a wall (15) that delimits outwards the interior space (1) of the liquid tank (4), which is arranged next to the inte rior (1) opposite the accommodation space (2), because the domestic dishwasher has a side wall (28) that is arranged on one side of the interior space (1) of the liquid tank (4) opposite the accommodation space ( 2), because between the mentioned wall (15) of the liquid tank (4) and the mentioned side wall (28) there is a hollow space (36) open towards the environment of the domestic dishwashing machine, so that in the hollow space (36) ambient air can enter, where condensate (33) that forms in the hollow space (36) is expelled through the hollow space (36) by condensing moisture from the incoming air into the hollow space (36) ). 2. Domestic dishwashing machine according to the preceding claim, characterized in that the hollow space (36) is in fluid connection with a condensate duct (35), through which the condensate (33) is expellable to another area of the machine domestic dishwasher 3. Domestic dishwashing machine according to one of the preceding claims, characterized in that the condensate duct (35) flows into a pump sump (14) of the domestic dishwashing machine, in the housing space (2), in a storage tank. collection (29), at an outlet (19), or in the area of a compressor (30) of the heat pump arrangement to cool the compressor (30). 4. Domestic dishwashing machine according to one of the preceding claims, characterized in that the mentioned wall (15) of the liquid tank (4) and the mentioned side wall (28) of the domestic dishwashing machine extend parallel to each other. . 5. Domestic dishwashing machine according to one of the preceding claims, characterized in that the aforementioned wall (15) of the liquid tank (4) and the mentioned side wall (28) of the domestic dishwashing machine have a distance from each other which amounts to between 1 mm and 30 mm. 6. Domestic dishwashing machine according to one of the preceding claims, characterized in that the hollow space (36) comprises several chambers (31) that are spatially separated from each other by wings (32) at least by sections. 7. Domestic dishwashing machine according to the claim set forth above, characterized in that the chambers (31) each have an air inlet (12) connected to the environment of the domestic dishwasher and an air outlet (26) arranged below the air inlet (12) during the intended use of the domestic dishwasher machine and also connected to the environment of the domestic dishwasher machine, so that the air around the domestic dishwasher machine can flow through the chambers (31). 8. Domestic dishwashing machine according to claims 6 or 7, characterized in that the wings (32) extend vertically. 9. Domestic dishwashing machine according to one of claims 6 to 8, characterized in that the wings (32) extend between the mentioned wall (15) of the liquid tank (4) and the mentioned side wall (28) of the domestic dishwasher machine . 10. Domestic dishwashing machine according to one of claims 6 to 9, characterized in that the wings (32) join together the mentioned wall (15) of the liquid tank (4) and the mentioned side wall (28) of the domestic dishwashing machine . 11. Domestic dishwashing machine according to one of claims 6 to 10, characterized in that the wings (32) are formed by sections of the liquid tank (4) or the mentioned side wall (28) of the domestic dishwashing machine. 12. Domestic dishwashing machine according to one of claims 6 to 11, characterized in that between the mentioned wall (15) of the liquid tank (4) and the side wall (28) of the domestic dishwashing machine is arranged next to the hollow space ( 36) opposite the housing space (2) another wall section (11), which delimits the hollow space (36) together with the wings (32) and the mentioned wall (15) of the liquid tank (4). 13. Domestic dishwashing machine according to one of the preceding claims, characterized in that the liquid tank (4) comprises at least a first tank section (6) with a supply inlet (7) through which the liquid tank (4) It is chargeable with washing liquid, because the liquid tank (4) comprises at least a second tank section (8) with a drain (9) through which the washing liquid present in the liquid tank ( 4) can leave the liquid tank (4), where the first tank section (6) and the second tank section (8) are connected to each other in terms of fluids and are arranged in series as to the fluids, so that the washing liquid present in the first tank section (6) is moved to the second tank section (8) if through the supply inlet (7) more washing liquid is introduced into the first tank section tank (6), and where the outer surface The evaporator (10) mentioned above (10) is arranged in such a way that it is in contact at least in sections with the washing liquid present inside the first tank section (6) if the first tank section (6) is full of washing liquid. 14. Procedure for putting into operation a domestic dishwasher machine with a housing space (2) to house washing items (3), with a liquid tank (4) disposed outside the accommodation space (2), which It has an interior space (1) to accommodate washing liquid, and with a heat pump arrangement, where the heat pump arrangement has an evaporator (10) to evaporate a heat carrier (34), which circulates inside the heat pump arrangement during operation of the heat pump arrangement, where the evaporator (10) has an outer surface (5) that is arranged such that it is in contact at least in sections with the washing liquid present inside the liquid tank (4) if The liquid tank (4) is filled with washing liquid, characterized in that the liquid tank (4) has a wall (15) that delimits outwards the interior space (1) of the liquid tank (4), which is arranged on one side of the interior space (1) opposite the accommodation space (2), because the domestic dishwasher has a side wall (28) that is arranged on one side of the interior space (1) opposite the accommodation space (2) ), because between the mentioned wall (15) of the liquid tank (4) and the mentioned side wall (28) there is a hollow space (36) open towards the environment of the domestic dishwashing machine, so that in the hollow space ( 36) air enters the environment, where through the esp The condensate (33) that is formed in the hollow space (36) is expelled by the condensation of moisture from the incoming air into the hollow space (36). 15. Method according to the preceding claim, characterized in that the condensate (33) is expelled to a pump sump (14) from the domestic dishwasher, to the housing space (2), to a collection tank (29), a an outlet (19), or to the area of a compressor (30) of the heat pump arrangement to cool the compressor (30).