ES2642117B1 - Dishwasher machine and procedure for washing and drying washing items - Google Patents

Abstract

A dishwashing machine is proposed for washing washing articles during one or several partial washing operations in which water is conducted and for subsequently drying the washing articles during a drying operation subordinated to the mentioned partial washing operations, with a housing space (1) delimited outwards by several walls (2), with at least one heat pump where the condenser (5) comprises several condenser sections (7) that are arranged on an opposite outer side (8) to the housing space (1), of one or more of the walls (2) mentioned in such a way that the heat emitted by the condenser (5) during the operation of the heat pump arrangement is emitted into the accommodation space (1) through the adjacent wall (2) in each case. Also, the invention refers to a method for washing and drying washing articles.

Description

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DISHWASHER MACHINE AND PROCEDURE FOR WASHING AND DRYING WASHING ITEMS

DESCRIPTION

The invention refers to a dishwashing machine for washing washing articles during one or several partial washing operations in which water is conducted and for subsequently drying the washing articles during a subordinate drying operation or to the mentioned partial washing operations, with a housing space to house the washing items to be washed, where the housing space is delimited outwards by several walls, and with at least one heat pump arrangement comprising a heat carrier means, where the pump arrangement Heat comprises an evaporator, a compressor, a condenser, and a pressure reducer, where the condenser comprises several condenser sections that are in fluid connection with each other, through which the heat-carrying medium flows during operation of the heat pump arrangement, and which are arranged on an outer side, opposite the space or of housing, of one or several of the mentioned walls in such a way that the heat emitted by the condenser during the operation of the heat pump arrangement is emitted into the housing space through the adjacent wall in each case.

Also, the invention refers to a method for washing and drying washing articles in a housing space of a dishwasher machine, where the dishwasher machine is preferably configured according to the following description, where, during a cleaning and / or drying operation of a washing program, a heat pump arrangement of the dishwashing machine is put into operation, where the heat emitted by a condenser of the heat pump arrangement during its operation is partially emitted to an outside side, opposite to the accommodation space, of at least one wall of the dishwasher and, from there, to a washing liquid present within the accommodation space and / or to the air present within the accommodation space.

In conventional dishwashing machines, an electric heating for the water is usually provided, in order to be able to heat to the required temperature the amount of water introduced for it in each case in the housing space of the dishwasher for at least one operation partial wash

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in which water is conducted, for example, for the cleaning operation and / or polishing operation, of a washing operation to be carried out. It can be made, for example, in the form of a continuous step heater. Preferably, it is a component of the liquid circulation circuit of the dishwashing machine, which comprises a circulation pump, one or several spray arms, if necessary, a water diverter for selective coupling to the outlet pipe of the Circulation pump of supply pipes leading to the particular spray arms, a pump pit installed on the floor of the housing space, in which the washing liquid (water or water with impurities and / / accumulates in the housing space) or cleaning product and / or rinse aid) sprayed by spray devices, and / or, if necessary, valves, liquid, connection, etc. The heating of that amount of water that has been introduced into the housing space to carry out the respective partial washing operation, for example, the cleaning operation and / or the polishing operation, at the minimum necessary temperature requires the generation of a thermal energy or, what is the same, a heat energy, determined through electric heating, which brings with it that a corresponding amount of electrical energy is necessary. It is desirable that this electric power consumption be kept as low as possible.

An alternative possibility to bring the washing liquid to the desired temperature is described in DE 10 2015 203 532. Here, a heat pump arrangement is provided, where the thermal energy generated by the condenser is transmitted to the air present within the accommodation space and the washing liquid circulating in the dishwasher (below, the precise mode of operation of the heat pump arrangement which is also used according to the present invention) is described more accurately.

Another heat pump arrangement is disclosed in DE 10 2016 201 688, where it is further proposed that the heat pump arrangement, in particular, its evaporator, be used to dry the moist air leaving the housing space during a drying operation

The present invention solves the technical problem of advantageously improving the prior art mentioned.

This technical problem is solved by a dishwashing machine and a method according to the independent claims.

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The dishwashing machine comprises a housing space to house the washing items to be washed (for example, dishes), where the housing space is delimited outwards by several walls. The walls form a floor, several side walls, and a cover section, where one of the side walls or the cover section presents or forms a door through which the washing articles can be introduced into the housing space and removed again after finishing a wash operation.

In the sense of the present invention, the term "walls" includes the concept of the walls that delimit the accommodation space, that is, the interior sides of the walls are visible at least in large part from the interior of the accommodation space. Naturally, the dishwasher can have other walls that form a frame, which wraps the mentioned walls outwards, and there may also be a substructure that is arranged under the floor wall.

In any case, the dishwashing machine comprises a heat pump arrangement, where the heat pump arrangement comprises an evaporator, a compressor, a condenser, and a pressure reducer, which are connected to each other through corresponding conduits. , and through which a heat carrier medium flows during the operation of the heat pump arrangement.

Next, the mode of operation of the heat pump arrangement during operation is briefly explained. In the evaporator, the heat-carrying medium evaporates when heat is absorbed from the surroundings or from the heat accumulator described in more detail below, thus changing its physical state from liquid to gaseous. The carrier medium of gaseous heat reaches the compressor, in which it is compressed without modifying its physical state and, thereby, is heated. The heated gaseous heat carrier medium then passes through the condenser, in which the gaseous heat carrier medium condenses by emitting heat. After passing through the pressure reducer, the heat-carrying medium finally returns to the evaporator again, so that the circuit is closed.

According to the invention, the condenser comprises several condenser sections that are in fluid connection with each other, where the individual condenser sections are formed, for example, by tubular sections, through which the heat-carrying medium flows during operation. of the heat pump arrangement. The condenser sections must not necessarily be several

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particular elements separated and connected to each other, but a capacitor section is, as the name implies, a condenser section, which may comprise, for example, several rectilinear sections and several curved sections.

In any case, it is advantageous if the condenser has several condenser sections that are arranged on an outer side, opposite the housing space, of one or more of the mentioned walls such that the heat emitted by the condenser during operation of the heat pump arrangement be emitted into the housing space through the adjacent wall in each case. In this way, the washing liquid present within the housing space is finally heated, or the air present within the accommodation space, where, through the heated air, the corresponding washing liquid and / or the washing articles present within the accommodation space. Thus, the heat pump can be operated during a cleaning operation or also during a drying operation to cause cleaning or drying, respectively, by means of the hot washing liquid or the hot air.

To now improve the heat conduction of the condenser sections inside the housing space, the invention provides that the dishwasher machine comprises thermoconductive sections that are in thermoconductive contact with at least a part of the condenser sections and with at least the side exterior of one of the mentioned walls in order to improve the heat conduction to the housing space of the condenser sections that are in contact with the thermoconductive sections.

Therefore, the dishwashing machine comprises a condenser with several condenser sections, as well as additional thermoconductive sections, which are, for example, in thermally conductive contact, preferably direct, with the condenser sections.

Alternatively, the thermoconducting sections may also be part of the condenser and here form one or more surface sections that differ from the condenser sections and / or run between two adjacent condenser sections. In any case, the thermally conductive sections should be at least partially in contact with the outer side of one or more of the mentioned walls and / or with one or more of the mentioned condenser sections, directly or indirectly through one or more of other thermoconductive elements,

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to make possible a good thermal conduction between the condenser sections and the housing space.

Therefore, the essential idea of the present invention is to emit the heat emitted by the condenser sections partially directly to one or several adjacent walls, while another part of the mentioned heat is emitted to the thermoconductive sections and, of these, to the corresponding wall (s). In this way, the total heat introduced by the condenser in the housing space is increased with respect to the case in which the thermally conductive sections according to the invention have been dispensed with.

According to an advantageous improvement, at least a part of the condenser sections extends at least by sections between the outer side of at least one of the mentioned walls and one or more thermoconductive sections. Thus, the corresponding condenser sections are embedded, so to speak, as a sandwich between the adjacent wall and the adjacent thermoconducting section (s), so that the heat emitted by the condenser sections can be emitted both directly to the adjacent wall. as to the, or to the thermoconducting sections also adjacent.

Preferably, the condenser sections are in direct contact with both the outer side of a wall and the inner side or sides of one or more thermoconductive sections directed towards the respective condenser sections.

According to an advantageous improvement, the thermoconductive sections form one or more covers that cover or cover at least the sections of the condenser sections in a direction opposite to the housing space. The thermally conductive sections thereby act as shielding in a direction opposite to the housing space, so that also the thermal radiation emitted by the condenser sections is reflected in the direction of the housing space. Also, the thermoconductive sections can form a uniform body, which covers the condenser sections as a cover.

Otherwise, the thermoconductive sections are preferably composed of a metal mostly or completely.

According to an advantageous improvement, the condenser sections are formed by tubular sections of one or several tubular duct systems, which preferably extend in a plane at least by sections. As an example, it

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It is conceived that the condenser comprises a system of tubular conduits, through which the heat-carrying medium can flow and whose individual tubular sections connected to each other extend in a plane with a sinuous, spiral, or meander shape. Preferably, the tubular sections are composed of metal and have an inner diameter whose magnitude amounts to between 1 mm and 2 cm.

According to an advantageous improvement, the cover has cavities, where the tubular sections extend at least by sections within the cavities. As an example, it is conceived that the cross section of the cover has "U" shaped cavities, so that each condenser section rests on both sides on the inner side of a "U" shaped leg and in the base section of the "U" shape joining the legs. In addition, the cover should be positioned such that the legs of the "U" shape extend between the outer side of the adjacent wall of the housing space and the aforementioned base section of the "U" shape. Each two wings of the basic shape may finally be joined in the aforementioned cross section by an intermediate section, which rests directly on the outer side of the adjacent wall.

According to an advantageous improvement, the thermoconductive sections are in direct contact at least by sections with the outer side of at least one wall. The thermally conductive sections can be, for example, glued, riveted, screwed, or also heat-welded with the adjacent wall. Likewise, it is conceived that the thermally conductive sections are only pressed against the corresponding outer wall. In particular, it is advantageous if the thermoconductive sections have sections that connect the aforementioned cavities together, where these sections can be in contact with an outer side of an adjacent wall, while the remaining sections of the thermoconductive sections are distanced from the outer side and shield the condenser sections preferably in the opposite direction to the housing space, that is, outwards.

According to an advantageous improvement, an insulation, preferably flat, is arranged in an area of the thermally conductive sections opposite the housing space. In other words, it is advantageous if the thermoconductive sections are between an adjacent wall and the mentioned insulation. This minimizes radiation losses. Preferably, the insulation is made as an insulating coating, which is arranged next to the inner side of an outer wall of the dishwasher, where the condenser sections and

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The thermally conductive sections should extend between the mentioned outer wall and a wall that delimits the accommodation space.

According to an advantageous improvement, the condenser sections and the thermoconductive sections are arranged under a wall made as a floor and that delimits out the accommodation space, so that the heat emitted by the condenser sections is emitted upwards to the liquid of washing that accumulates in the soil area. Additionally or alternatively, the condenser sections may also be arranged in the area of the outer side of one or more of the remaining walls. Likewise, it is conceived that the condenser is divided into several sections, where each section comprises several condenser sections, and individual sections are arranged in the area of the outer side of several walls.

According to an advantageous improvement, the condenser sections and the thermally conductive sections are arranged in a hollow space, which is preferably delimited in the direction of the housing space at least by sections on the outer side of one or more of the mentioned walls. The term "hollow space" includes the concept of a closed area in which the condenser sections (or at least sections thereof) and the thermoconductive sections (or at least sections thereof) are located. condenser and thermoconducting sections, other components or, as explained in more detail below, air and / or a heat accumulating material can be found in the hollow space.

Obviously, the hollow space can also have inputs and outputs and / or connections for air and / or water conduits, so that the hollow space does not have to be tightly closed with respect to the environment. Preferably, the hollow space is disposed below the bottom wall that forms the floor of the accommodation space.

Specifically, it is conceived that the hollow space has a cavity and / or perforation in or through which the pump pit of the dishwasher machine extends.

According to an advantageous improvement, the hollow space has a hollow air accommodation space with an air inlet and at least one air outlet. In this way, air can flow through the hollow space, where the dishwasher preferably has a fan, which causes the said air transport.

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Likewise, it is advantageous if at least the air outlet is connected with an air duct that flows into the housing space, so that the air leaving the air housing space through the air outlet can flow into the interior. of the accommodation space. If air is now transported into the air housing space during operation of the heat pump arrangement, then it absorbs heat from the condenser. Finally, the heated air arrives through the air outlet and the air duct to the housing space, and there serves to heat the washing liquid and / or the washing articles during a partial washing operation in which it is conducted water (for example, during a prewash or cleaning operation), or during a drying operation during which the wash items are to be dried.

While the air inlet can be connected directly or through another air duct with the surroundings of the dishwasher machine (in this case, the air space can reach pure air from outside the dishwasher machine), it is also conceived that also the air inlet is in fluid connection with the housing space through a corresponding air duct, so that the air in the circuit can be conducted. In particular during the mentioned drying operation, in this case it is advantageous if the air leaving the housing space is cooled before it is conducted again through the air accommodation space, in order to condense the water vapor dragged with it from the accommodation space and increase the water absorption capacity of the air.

This can be achieved, for example, by conducting the air along a cold surface, for example, the evaporator, after leaving the housing space and before entering the air housing space again. Otherwise, this is also convenient if air is not conducted, as described, in a circuit. As an example, it is conceived that during the drying operation pure air is supplied to the air housing space, heated there and then supplied to the accommodation space. After passing through the accommodation space, the moist air is finally conducted along the mentioned cold surface before it leaves the dishwasher to the surroundings. This prevents condensation of water vapor on surfaces surrounding the dishwasher (for example, in a kitchen cabinet).

According to an advantageous improvement, the thermoconductive sections have one or more ribs that penetrate the air accommodation space. In this way, the heat transmission between the thermally conductive sections is greatly improved

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and the air flowing through the air housing space with respect to a solution without the corresponding ribs. The nerves can be made, for example (at least in large part), by a metal and, for example, be in direct contact with the thermoconductive sections. It is also conceived that the thermoconductive sections (or a part thereof) and the nerves (or a part thereof) are constituent part of a single component.

According to an advantageous improvement, a desiccant is disposed within the air housing space, preferably in the form of zeolite. If the air flowing into the air housing space comes into contact with the desiccant, then it removes moisture from the air. If the air dried in this way finally flows during a drying operation in a heated state inside the housing space, drying of the washing articles is carried out particularly quickly. In order to finally be able to dry the desiccant again after moisture absorption, it is advantageous if the dishwashing machine comprises an electric heating device, with which the desiccant can be heated to temperatures between 200 ° C and 300 ° C to expel stored moisture from it. Preferably, the heating device is an air heating, which can be heated to the aforementioned temperatures by means of the air flowing through the air housing space. The air heating may be integrated, for example, in an air duct connected to the air inlet.

According to an advantageous improvement, a storage space is arranged within the hollow space, which is partially or completely filled with a heat accumulator material, for example, in the form of water or in the form of a latent heat accumulator material, where The storage space is in thermoconductive contact at least partially with the condenser sections and / or with the thermally conductive sections.

Preferably, the storage space adjoins the thermoconductive sections, where the thermoconductive sections should be between the housing space and the storage space. The arrangement of a corresponding storage space now has several advantages. First, the heat accumulator material contained therein can temporarily store the heat emitted by the condenser during the operation of the heat pump arrangement. If heat is required in the housing space in a subsequent partial washing operation, then air flows through the space

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air housing, and extracts heat from the heat accumulator material to then emit it again to the washing articles, or to the washing liquid within the housing space. Likewise, it is possible to emit heat directly from the heat accumulating material through the heat conducting sections to the washing liquid that touches the wall that is in thermally conductive contact with the heat conducting sections.

By way of example, in this context it would be conceived that the heat pump arrangement was activated during a polishing operation and that, during this, the heat accumulator material was loaded with heat. In the following drying operation, the operation of the heat pump arrangement can finally be dispensed with, since the heat required to dry the washing articles is transmitted from the heat accumulating material to the air flowing through the space of air housing and finally to the wash items.

It is also conceived that water is used as a heat storage material, which is heated within the storage space for a partial washing operation that conducts water and requires hot water. In this case, during or before the start-up of the heat pump arrangement, water is conducted into the storage space, where it is heated during the operation of the heat pump arrangement and, finally, is taken to the accommodation space in which it is finally circulated to wash the washing articles.

According to an advantageous improvement, the dishwasher has a heat accumulator that is filled with a liquid, preferably water, or that is fillable with the mentioned liquid through an inlet flow, where the evaporator of the heat pump arrangement is extends partially or completely inside the heat accumulator, so that, during the operation of the heat pump arrangement, the heat is transmissible from the liquid in the heat accumulator to the heat-carrying medium flowing to through the evaporator The heat accumulator can be, for example, a water box that is arranged in the area directed out of one or several side walls of the dishwasher.

In addition, the heat accumulator may be in direct contact with the mentioned wall or walls. However, it is also conceived that a wall insulation is installed between the heat accumulator and the wall (s), which prevents or minimizes heat transfer between the heat accumulator and the space

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housing up to a defined thermal difference between the mentioned liquid and the housing space.

It is also advantageous if the heat accumulator is connected to a fresh water outlet, through which fresh water is introduced into the heat accumulator. If the heat accumulator is filled with fresh water from a fresh water pipe, then it is heated to room temperature when the dishwasher is not running. During the operation of the dishwashing machine, this preheated water finally reaches the accommodation space (preferably, during a prewash operation, during which the larger impurities have to be removed from the wash items). On the other hand, more fresh water reaches the heat accumulator, always maintaining the state of filling thereof preferably constant.

During the operation of the heat pump arrangement, the water contained within the heat accumulator also serves as a heat source to evaporate the heat-carrying medium flowing through the evaporator during the operation of the heat pump arrangement. In this way, the water stored temporarily in the heat accumulator is cooled and, in a subsequent drying operation, can finally contribute to the condensation of the water vapor present inside the housing space, which extends by the wall adjacent to the heat accumulator. Thus, the water present in the heat accumulator is heated again and, in a subsequent washing operation, it can be brought back to the accommodation space to wash the washing articles.

Likewise, a procedure for washing and drying washing articles in a housing space of a dishwashing machine is proposed, where the dishwashing machine is preferably configured according to the previous and / or following description, where the individual characteristics can be materialized separately or combined between yes.

The procedure provides that, during a cleaning and / or drying operation of a washing program, a heat pump arrangement of the dishwashing machine will be put into operation, where the cleaning operation is designed to free the articles of impurities washing present inside a housing space of the dishwasher machine, and where the drying operation is designed to dry the washing articles after washing.

It is also provided that the heat emitted by a condenser of the heat pump arrangement during operation of the heat pump is partially emitted to the side.

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exterior, opposite the accommodation space, of at least one wall of the dishwasher and, from there, a washing liquid present within the accommodation space and / or the air present within the accommodation space.

According to the invention, only part of the heat emitted during the operation of the heat pump arrangement is emitted to thermoconductive sections of the dishwashing machine and, from there, to the washing liquid present within the housing space and / or to the present air within the accommodation space.

In other words, the central idea of the process according to the invention therefore consists in using the heat that inevitably results during the operation of the heat pump arrangement to heat the washing liquid present within the housing space, or, the air present in the housing space, during a cleaning and / or drying operation, where heat is transmitted to the interior of the housing space from the condenser, the thermoconductive sections described above being partially interleaved in detail.

According to an advantageous improvement, during the cleaning and / or drying operation, air is conducted through an air inlet into a hollow space, in which the condenser is arranged, where the hollow space is preferably arranged below the accommodation space. The heat emitted by the condenser during operation of the heat pump arrangement is partially transmitted here to the air conducted into the hollow space. Finally, the heated air inside the hollow space leaves the hollow space through an air outlet and, at the end, arrives inside the housing space of the dishwasher to heat the washing liquid present in the housing space and / or dry the wash items by absorbing water.

Other embodiments and refinements of the process according to the invention are set forth in the description of the claimed dishwashing machine, and vice versa.

The advantageous embodiments and refinements of the invention set forth above and / or reproduced in the claims can be used here (except, for example, in cases of univocal interdependencies or incompatible alternatives) separately or also in any combination with each other.

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

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Figure 1 an exemplary embodiment of a dishwashing machine according to the

invention in front view, and

Figures 2 to 5 the lower area of different embodiments of a

dishwashing machine according to the invention, cut in each case in a plane that extends parallel to the plane of the paper.

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 dishwasher that are necessary for the understanding of the invention are explained. Obviously, the dishwashing machine according to the invention can comprise other parts and construction groups.

Figure 1 shows a schematic diagram of a possible embodiment of a dishwashing machine according to the invention.

As is usual in the state of the art, the dishwasher has a housing space 1, delimited outwards by several walls 2, to house the washing items to be washed (for example, dishes), not shown. The walls 2 are usually two side walls 2, a rear wall 2 extending parallel to the plane of the sheet, a front wall 2 extending parallel to the plane of the sheet, which is normally made as a door or has a , a cover wall, and a bottom wall 2, which forms the floor 12. The latter preferably has a cavity or perforation, where, in the area of the cavity or perforation, a pump pit 24 is formed, in which accumulates the washing liquid 26 to be supplied to one or several spray arms 22 and, finally, on the washing article, during a cleaning operation through one or several washing liquid ducts 28 and by means of a circulation pump 25 (The direction of the flow of the washing liquid 26 is indicated by an arrow in the section that extends vertically to the left of the washing liquid conduit 28).

Also, the dishwashing machine comprises a heat pump arrangement, which in turn comprises at least one evaporator 3, a compressor 4, at least one condenser 5 and at least one pressure reducer 6, which are crossed by a heat carrier material flowing into one or more ducts 29 (the direction of the current is indicated by an arrow in the section of

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conduit to the right of the compressor 4). In relation to the basic mode of operation of the heat pump arrangement, reference is made to the above description.

In addition, the dishwashing machine may comprise a heat accumulator 37, which is preferably made as a water box, which in turn is preferably arranged in the area of a side wall 2. The heat accumulator 37 can be, for example, a metal or plastic tank. Also, the heat accumulator 37 is preferably connected to a fresh water network, for example, of a building, through a fresh water supply conduit 31, so that, with the corresponding position of a valve not shown, Liquid 32 in the form of cold fresh water can flow into the heat accumulator 37.

If fresh water is introduced into the heat accumulator 37 before the dishwasher is put into operation, then it can be heated to room temperature before the start of a cleaning operation, which can save energy.

Water, possibly preheated to room temperature, finally flows into the housing space 1 during the start of a cleaning operation through a corresponding liquid conduit 27. There, it first accumulates in the area of the floor 12 or, which is the same, of the pump pit 24.

Preferably, the condenser 5 of the heat pump arrangement is now arranged in the area of the floor 12, so that the heat generated by the condenser 5 is transmitted through the lower wall 2 to the washing liquid 26 and / or to the air present within the housing space 1. Alternatively or additionally, the condenser 5 could also be placed in the area of one or more of the remaining walls 2.

After completion of the cleaning operation (s), the washing liquid 26 is usually removed from the dishwasher through a drain pump not shown.

In the next step, the drying of the washing articles is carried out. For this, pure air is conducted into the accommodation space 1 through an inlet not shown, or the air is transported in a circulating air operation through the accommodation space 1 and an air channel connected to it.

The heat accumulator 37 contributes to drying, since the water inside it has been cooled during the previous operation or still in operation of the arrangement

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of heat pump by evaporator 3, which extends into the interior, or through the interior of the heat accumulator 37.

A wall insulation 30 that can be located between the heat accumulator 37 and the outer side 8 of the adjacent side wall 2 should be configured here so that heat can be transmitted during the drying process of the water vapor present within the housing space 1 to the liquid 32 present in the heat accumulator 37 in order to cause condensation of the water vapor. Simultaneously, the wall insulation 30 should minimize excessive heat transmission from the washing liquid 26 to the liquid 32, present inside the heat accumulator 37, during a cleaning operation.

Taken together, the wall insulation 30 preferably has a heat transfer resistance RT of at least 0.02 (K m2) / W, in particular between 0.1 (K m2) / W and 1 (K m2) / W. In this way, a sufficient thermal barrier or brake is provided on the one hand for the thermal energy introduced into the housing space 1 of the dishwashing machine during a cleaning operation with washing liquid 26 to be heated, that is, said energy is maintained for the duration of the cleaning operation in the housing space 1 of the dishwasher so that the profile of the temporary evolution of the temperature necessary for this partial washing operation can be respected in the housing space 1 . Preferably, this profile corresponds approximately to the temporary evolution of the temperature of the same partial washing operation in a dishwasher machine constructed in a conventional manner (without heat pump arrangement). On the other hand, the weak effect of the thermal coupling of the wall insulation 30 is sufficient during the drying operation that ends the washing operation to cool the wall 2, next to whose outer part the heat accumulator 37 is installed, for drying by desired condensation to a sufficient extent in relation to the air and / or the washing articles present in the washing tank, if the heat accumulator 37 has previously been cooled by the heat pump arrangement. This does not apply until the heat pump arrangement is activated again, that is, it is on, during the drying operation.

Figure 2 shows an advantageous embodiment of the lower area of the dishwashing machine, where a corresponding structure is also basically conceived in the area of a side wall 2 (this is also applicable for the remaining figures). In principle, the representation corresponds in the remainder to a section of Figure 1 that extends parallel to the plane of the sheet.

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As extracted from Figure 2, the dishwashing machine according to the invention has a condenser 5, which comprises several condenser sections 7 that are in fluid connection with each other. By way of example, the condenser sections 7 may be formed by tubular sections 11, which extend in a top view (that is, in Figure 2 from above) in the form of a meander, spiral, or otherwise. Naturally, the condenser 5 has an inlet and an outlet for the heat-carrying medium, which are not, however, shown for reasons of clarity.

Preferably, the condenser sections 7 extend into a hollow space 13, which runs into the housing space 1, which can be delimited, for example, by a separate substructure 36, and which is also advantageously insulated towards outside, in particular, down, by insulation 33.

From figure 2 it is also extracted that the condenser sections 7 are according to the invention in direct contact, at least thermoconductive, with thermoconductive sections 9, being advantageous if the thermoconductive sections 9 (which can be a constituent part of one or more components) have cavities 23 in which the condenser sections 7 extend at least by sections and which can be made, for example, in the form of a groove (for reasons of clarity, in the second cavity 23 on the left no section of capacitor 7, although, obviously, a corresponding capacitor section 7 should also extend here).

In any case, the condenser sections 7 are placed at least in sections between the lower wall 2 and the thermally conductive sections 9 such that the heat emitted by the condenser 5 during the operation of the heat pump arrangement can be emitted to through the thermoconductive sections 9 to the lower wall 2 and, finally, it can be transmitted to the washing liquid 26 or to the air present within the housing space 1. Since the thermoconductive sections 9 also surround the condenser sections 7 in the area opposite to the lower wall 2, also the heat emitted downward is transmitted into the housing space 1 through the heat conducting sections 9. In this case, the heat conducting sections 9 form a cover 10 of the condenser sections 7.

Figure 3 shows an advantageous improvement.

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In contrast to Figure 2, there is present an air supply inlet 34 connected to the hollow space 13 and which leads to an air inlet 15, an air outlet 16, and an air duct 17 connecting the hollow space 13 with the accommodation space 1. Thus, the hollow space 13 has an air accommodation space 14, through which the air can flow, where there may be, for example, a fan of the dishwashing machine in charge thereof. Moreover, the air supply inlet 34 can also be connected to the housing space 1 through an air duct 1 or flow into the environment of the dishwasher to be able to suck in fresh air.

If air now flows during the operation of the heat pump arrangement into the air housing space 14 through the air inlet 15, then it is heated upon contact with the thermoconductive sections 9 and finally flows in been heated through the air duct 17 into the housing space 1 to heat the washing liquid 26 and / or the washing articles here.

In order to improve the heat transmission between the air and the thermoconductive sections 9, ribs 18 may be present which are preferably in direct connection with the thermoconductive sections 9 or that are part thereof, and which enter the space of air housing 14.

Figure 4 shows a solution in which the hollow space 13 together with the condenser sections 7 and the thermoconductive sections 9 forms a storage space 20, which is partially or completely filled with a heat accumulator material 21, for example , water, or with a latent heat accumulator material.

This has the advantage that the heat emitted by the condenser sections 7 can be stored temporarily, which cannot be transmitted directly to the housing space 1. At a later time, for example, in a subsequent partial washing operation, The heat stored temporarily in the heat accumulator material 21 can finally be introduced into the housing space 1 through the heat-conducting sections 9. In this way, energy efficiency can be further improved.

Finally, a possible embodiment is shown in Figure 5 in which, under the aforementioned storage space 20, a section of the hollow space 13 is disposed, separated by a separating wall 35, which is

filled with a desiccant 19 and which is again provided with an air inlet 15 and an air outlet 16 described in relation to figure 3 (not shown in figure 5).

In the air housing space 14 shown in Figure 5, a desiccant 19 is finally arranged, next to which the air must flow before entering the housing space 1. In this way, the moisture content of the air decreases, thereby increasing its water absorption capacity. This is particularly advantageous if the air flows through the hollow space 13, or, from its air housing space 14, during a drying operation.

In the other aspects, the invention is not limited to the exemplary embodiment shown, but all combinations of the described individual characteristics are described, 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.

fifteen

Reference symbols

1. Accommodation space

2. Wall

3. Evaporator

4. Compressor

5. Condenser

6. Pressure reducer

7. Condenser section

8. Exterior side of the wall

9. Thermoconductive section

10. Cover

11. Tubular section

12. Soil

13. Hollow space

14. Air accommodation space

15. Air inlet

16. Air outlet

17. Air duct

18. Nerve

19. Desiccant

20. Storage space

21. Heat accumulator material

22. Spray arm

23. Cavity

24. Pump pit

25. Circulation pump

26. Washing liquid

27. Liquid duct

28. Washing fluid duct

29. Duct for heat carrier medium

30. Wall insulation

31. Freshwater supply pipe

32. Liquid

33. Insulation

34. Air supply inlet

35. Wall separator

36. Substructure

37. Heat accumulator

Claims (16)

5 10 fifteen twenty 25 30 35 1. Dishwashing machine for washing washing articles during one or several partial washing operations in which water is conducted and for subsequently drying the washing articles during a drying operation subordinated to the mentioned partial washing operations, - with a housing space (1) to house the laundry articles to be washed, where the accommodation space (1) is delimited outwards by several walls (2), - with at least one heat pump arrangement comprising a heat carrier means, where the heat pump arrangement comprises an evaporator (3), a compressor (4), a condenser (5), and a pressure reducer (6), - where the condenser (5) comprises several condenser sections (7) that are in fluid connection with each other, through which the heat-carrying medium flows during the operation of the heat pump arrangement, and which are arranged on an outer side (8), opposite the housing space (1), of one or more of the mentioned walls (2) such that the heat emitted by the condenser (5) during operation of the pump arrangement of heat is emitted into the accommodation space (1) through the adjacent wall (2) in each case, characterized in that The dishwashing machine comprises thermoconductive sections (9) that are in thermoconductive contact with at least a part of the condenser sections (7) and with at least the outer side (8) of one of the walls (2) mentioned for the purpose of improve heat conduction to the housing space (1) of the condenser sections (7) that are in contact with the thermoconductive sections (9). 2. Dishwasher machine according to the preceding claim, characterized in that at least a part of the condenser sections (7) extends at least by sections between the outer side (8) of at least one of the mentioned walls (2) and one or several thermoconductive sections (9). 3. Dishwashing machine according to one of the preceding claims, characterized in that the thermoconductive sections (9) form one or more covers (10) covering at least by sections the 5 10 fifteen twenty 25 30 35 condenser sections (7) in a direction opposite to the space of accommodation (1). 4. Dishwasher machine according to one of the stated claims above, characterized in that the condenser sections (7) are formed by tubular sections (11) of one or more tubular duct systems, which preferably extend in a plane at least by sections. 5. Dishwashing machine according to claim 4, characterized in that the cover (10) has cavities (23), and because the tubular sections (11) extend at least by sections within the cavities (23). 6. Dishwasher machine according to one of the stated claims above, characterized in that the thermoconducting sections (9) are in direct contact at least by sections with the outer side (8) of at least one wall (2). 7. Dishwasher machine according to one of the claims set forth previously characterized in that, in an area of the thermoconductive sections (9) opposite the housing space (1), an insulation (33), preferably flat, is arranged. 8. Dishwasher machine according to one of the stated claims above, characterized in that the condenser sections (7) and the thermoconducting sections (9) are arranged under a wall (2) made as a floor (12) and that delimits outwardly the accommodation space (1). 9. Dishwasher machine according to one of the claims set forth above, characterized in that the condenser sections (7) and the thermoconductive sections (9) are arranged in a hollow space (13), which is preferably delimited in the direction of the housing space (1) at least by sections on the outer side (8) of one or more of the walls (2) mentioned. 10. Dishwasher machine according to the preceding claim, characterized in that the hollow space (13) has a hollow air housing space (14) with 5 10 fifteen twenty 25 30 35 an air inlet (15) and at least one air outlet (16), so that air can flow through the hollow space (13), and where at least the air outlet (16) is connected to a duct of air (17) that flows into the accommodation space (1), so that the air leaving the hollow space (13) through the air outlet (16) can flow into the accommodation space (1). 11. Dishwashing machine according to the preceding claim, characterized in that the thermoconductive sections (9) have ribs (18) that penetrate the air housing space (14). 12. Dishwashing machine according to claims 10 or 11, characterized in that a desiccant (19), preferably in the form of zeolite, is disposed within the air housing space (14). 13. Dishwashing machine according to one of claims 9 to 12, characterized in that a storage space (20) is arranged within the hollow space (13), which is partially or completely filled with a heat accumulating material (21), for example, in the form of water or in the form of a latent heat accumulator material, where the storage space (20) is in thermally conductive contact at least partially with the condenser sections (7) and / or with the thermally conductive sections (9 ). 14. Dishwasher machine according to one of the preceding claims, characterized in that the dishwasher machine has a heat accumulator (37) that is filled with a liquid, preferably water, or that can be filled with the liquid mentioned through an inlet flow , where the evaporator (3) of the heat pump arrangement extends partially or completely inside the heat accumulator (37), so that, during operation of the heat pump arrangement, the heat is transmissible from the liquid that is in the heat accumulator (37) to the heat-carrying medium flowing through the evaporator (3). 15. Procedure for washing and drying washing articles in a housing space (1) of a dishwashing machine, wherein the dishwashing machine is preferably configured according to one of the claims set forth above, 10 fifteen twenty 25 - where, during a cleaning and / or drying operation of a washing program, a heat pump arrangement of the dishwasher is put into operation, - where the heat emitted by a condenser (5) of the heat pump arrangement during its operation is partially emitted to an outer side (8), opposite the housing space (1), of at least one wall (2 ) of the dishwashing machine and, from there, a washing liquid (26) present within the housing space (1) and / or the air present within the accommodation space (1), characterized in that a part of the heat emitted during the operation of the heat pump arrangement is emitted to thermoconducting sections (9) of the dishwashing machine and, from there, to the washing liquid (26) present within the housing space (1) and / or to the air present within the accommodation space (1). 16. Method according to the preceding claim, characterized in that, during the cleaning and / or drying operation, air is conducted through an air inlet (15) into a hollow space (13), in which it is arranged the condenser (5), where the heat emitted by the condenser (5) is partially transmitted to the air conducted inside the hollow space (13), and because the air heated inside the hollow space (13) leaves the hollow space (13) through an air outlet (16) and then it is led into the housing space (1) of the dishwasher to heat the washing liquid (26) present in the housing space (1) and / or dry the wash items.