WO2017195057A1

WO2017195057A1 - Dish washing machine and method for cleaning and drying wash items

Info

Publication number: WO2017195057A1
Application number: PCT/IB2017/052363
Authority: WO
Inventors: Pilar Balerdi Azpilicueta; Vanesa ESTREMERA CARRERA; Eloy Merino Alcaide; Roberto San Martin Sancho
Original assignee: BSH Hausgeräte GmbH
Priority date: 2016-05-12
Filing date: 2017-04-25
Publication date: 2017-11-16
Also published as: ES2642117A1; ES2642117B1

Abstract

The invention relates to a dish washing machine for cleaning wash items during one or more water-conducting partial wash cycles and for subsequent drying of the wash items during a drying cycle after said one or more wash cycles, having a receiving chamber (1) for receiving the wash items to be cleaned, wherein the receiving chamber (1) is delimited to the outside by a plurality of walls (2), having at least one heat pump arrangement comprising a heat carrier medium, wherein the heat pump arrangement comprises an evaporator (3), a compressor (4), a liquefier (5) and a pressure reducer (6), wherein the liquefier (5) comprises a plurality of liquefier sections (7), which are fluidically connected to each other, through which the heat carrier medium flows during operation of the heat pump arrangement, and which are arranged on an outer side (8) of one or more of said walls (2) facing away from the receiving chamber (1) such that heat emitted by the liquefier (5) during operation of the heat pump arrangement is emitted into the receiving chamber (1) via the respectively adjacent wall (2). According to the invention, the dish washing machine comprises thermal conduction sections (9) which are in thermally conducting contact with at least one part of the liquefier sections (7) and with at least the outer side (8) of one of said walls (2), in order to improve the thermal conduction from the liquefier sections (7) in contact with the thermal conduction sections (9) into the receiving chamber (1). The invention further relates to a method for cleaning and drying wash items.

Description

Dishwasher and method for cleaning and

Drying dishes

The invention relates to a dishwasher for cleaning items to be washed during one or more water-carrying Teilspülgängen and for subsequent drying of the dishes during a subordinate rinsing subsections or drying cycle, with a receiving space for receiving the items to be cleaned, wherein the receiving space through a plurality of walls to the outside and at least one heat pump assembly comprising a heat transfer medium, the heat pump assembly comprising an evaporator, a compressor, a condenser and a pressure reducer, the condenser comprising a plurality of fluidly connected condenser sections through which the heat transfer medium flows during operation of the heat pump assembly , and which are arranged in such a way on a side facing away from the receiving space outside of one or more of said walls that the condenser during operation of the Wärmepumpena tion given heat is discharged through the respective adjacent wall in the receiving space.

Furthermore, the invention relates to a method for cleaning and drying of items in a receiving space of a dishwasher, wherein the dishwasher is preferably formed as described below, wherein during a cleaning and / or drying cycle of a wash program, a heat pump assembly of the dishwasher is operated, the one of Condenser of the heat pump assembly during the operation of heat emitted partially to an outside of the receiving space outside at least one wall of the dishwasher and from there to an existing within the receiving space rinse and / or within the receiving space existing air is discharged. In conventional dishwashers, electric water heating is usually provided in order to be able to heat a quantity of water respectively filled into the receiving space of the dishwasher to a required temperature for at least one water-conducting partial wash cycle, for example for the cleaning cycle and / or final rinse cycle. It can be designed, for example, in the form of a continuous flow heater. It is preferably a component of the liquid circulating circuit of the dishwasher, which in particular a Circulation pump, one or more spray arms, possibly a water diverter for selectively coupling feed pipes leading to the individual spray arms to the outlet pipe of the circulation pump, a pump sump attached to the bottom of the receiving space, in which the rinsing liquor sprayed from the one or more spray devices ( Water or water with impurities and / or cleaning agent and / or rinse aid) in the receiving space, and / or possibly valves, liquid connecting lines, etc. ... includes. The heating of that amount of water, which is admitted for the implementation of the respective Teilspülgangs, such as the cleaning cycle and / or rinse, in the receiving space to a required minimum temperature requires the generation of a certain thermal energy or heat energy by the electric heater, which a corresponding need for electrical energy brings with it. It is desirable to keep this electrical energy consumption as low as possible. An alternative possibility of bringing the rinsing liquor to the desired temperature is described in DE 10 2015 203 532. Here, a heat pump arrangement is provided, the heat energy generated by the liquefier being transferred to the air present in the receiving space and the rinsing liquor circulating in the dishwasher ( the exact mode of operation of the heat pump arrangement also used in accordance with the present invention will be described in more detail below).

A further disclosure of a heat pump arrangement can be found, moreover, in DE 10 2016 201 688, in which case it is additionally proposed to use the heat pump arrangement, in particular its evaporator, for drying the humid air leaving the receiving space during a drying cycle.

Object of the present invention is to develop the mentioned prior art in an advantageous manner.

The object is achieved by a dishwasher and a method according to the independent claims.

The dishwasher comprises a receiving space for receiving the items to be cleaned (eg crockery), wherein the receiving space is limited by a plurality of walls to the outside. The walls form a floor, several side walls and a ceiling section, wherein one of the side walls or the decks Block section has or forms a door through which the items to be washed can be added to the receiving space and removed again after completion of a rinse cycle. In the context of the present invention, the walls are the walls which delimit the receiving space, ie the inner sides of the walls are at least largely visible from the interior of the receiving space. Of course, the GS may have other walls which form a housing which surrounds said walls to the outside. Likewise, a substructure may be present, which is arranged below the wall serving as a floor.

In any case, the dishwasher comprises a heat pump arrangement, the heat pump arrangement comprising an evaporator, a compressor, a condenser and a pressure reducer, which are connected to one another via corresponding lines, and through which a heat transfer medium flows during operation of the heat pump arrangement.

The mode of operation of the heat pump arrangement during its operation is briefly explained below: In the evaporator, the heat transfer medium is vaporized by heat absorption from the environment or the heat accumulator described in more detail below, ie its state of aggregation changes from liquid to gaseous. The gaseous heat transfer medium finally passes into the compressor, in which it is compressed with the same state of aggregation and thus heated. The heated gaseous heat transfer medium then flows through the condenser, in which the gaseous heat transfer medium condenses with release of heat. After passing through the pressure reducer, the heat transfer medium finally comes back to the evaporator, so that the circuit is closed.

According to the invention, the condenser comprises a plurality of condenser sections which are in fluid connection with one another, wherein the individual condenser sections are formed, for example, by pipe sections through which the heat transfer medium flows during operation of the heat pump arrangement. The condenser sections need not necessarily be multiple separate and interrelated individual elements. Rather, a condenser section, as the name implies, is a section of the condenser which may, for example, comprise a plurality of rectilinear and a plurality of curved sections. In any case, it is advantageous if the condenser has a plurality of condenser sections, which are arranged on a side facing away from the receiving space outside of one or more of said walls, that the heat emitted by the condenser during operation of the heat pump assembly via the respective adjacent wall in the Recording room is delivered. This finally results in heating of the rinsing liquor present within the receiving space or of the air present within the receiving space, whereby the corresponding rinsing liquor and / or the items to be rinsed within the receiving space are heated via the heated air. The heat pump can thus be operated during a cleaning cycle or even a drying cycle in order to effect either the cleaning or the drying by warm rinsing liquor or warm air.

In order now to improve the heat conduction from the condenser sections into the interior of the receiving space, the invention provides that the dishwasher comprises heat-conducting sections which are in heat-conducting contact with at least part of the condenser sections and with at least the outside of one of the walls To improve heat conduction from the condenser sections in contact with the heat-conducting sections into the receiving space.

The dishwasher thus comprises a condenser with a plurality of condenser sections and additional heat-conducting sections, which are in contact, for example, with the condenser sections in heat-conducting, preferably in direct, contact.

Alternatively, the heat-conducting sections can also be part of the condenser and in this case form one or more surface sections which protrude from the condenser sections and / or extend between two adjacent condenser sections. In any case, the heat-conducting sections should abut at least partially on the outside of one or more of said walls and / or one or more of said condenser sections directly or indirectly via one or more further heat-conducting elements in order to ensure good heat conduction between the condenser sections and the receiving space to enable. The basic idea of the present invention is therefore to deliver the heat emitted by the condenser sections partly directly to one or more adjacent walls, while another part of said heat is delivered to the Wärmeleitabschnitte and from these to the corresponding (s) wall (s). The sum of the heat introduced by the condenser into the receiving space is thereby increased in comparison with the case in which the heat-conducting sections according to the invention would be dispensed with.

According to an advantageous development, at least part of the condenser sections extends at least in sections between the outside of at least one of said walls and one or more heat-conducting sections. The corresponding condenser sections are thus, as it were, sandwiched between the adjacent wall and the adjacent heat-conducting sections, so that the heat emitted by the condenser sections can be delivered both directly to the adjacent wall and to the or also adjacent heat-conducting sections. Preferably, the condenser sections are in direct contact both with the outside of a wall and the inner sides of one or more heat-conducting sections facing the respective condenser sections.

According to an advantageous development, the heat-conducting sections form one or more covers which at least partially cover or cover the condenser sections in a direction facing away from the receiving space. The heat-conducting sections thus act as a shield in a direction away from the receiving space, so that the heat radiation emitted by the condenser sections is also reflected in the direction of the receiving space. Incidentally, the heat-conducting sections can form a unitary body which covers the condenser sections in the manner of a cover.

Incidentally, the heat-conducting portions are preferably predominantly or entirely made of a metal.

According to an advantageous development, the condenser sections are formed by pipe sections of one or more pipeline systems, which preferably run at least in sections in one plane. For example, it would be conceivable that the condenser comprises a piping system through which the heat transfer medium can flow and whose individual interconnected pipe sections run serpentine, spiral or meandering in a plane. The pipe sections hen preferably made of metal and in particular have an inner diameter whose amount is between 1 mm and 2 cm.

According to an advantageous embodiment, the cover recesses, wherein the pipe sections extend at least partially within the wells. For example, it would be conceivable for the cover to have U-shaped depressions in a cross section, so that in each case one condenser section rests on both sides on the inside of a leg of the U-shape and on the base section of the U-shape connecting the legs. In addition, the cover should be placed such that the legs of the U-shape between the outside of the adjacent wall of the receiving space and said base portion of the U-shape. In each case two legs of the basic shape can finally be connected in the said cross-section through an intermediate section, which rests directly on the outside of the adjacent wall.

According to an advantageous development, the heat-conducting sections are in sections with the outside of at least one wall in direct contact. The Wärmeleitabschnitte can be glued, riveted, screwed or welded, for example, with the adjacent wall. It is also conceivable that the Wärmeleitab- sections are pressed only against the corresponding outer wall. In particular, it is advantageous if the Wärmeleitabschnitte have portions which connect the above recesses with each other, which portions may abut an outer side of an adjacent wall, while the remaining portions of the Wärmeleitabschnitte are spaced from the outside and the Verflüssigerabschnitte preferably in one of Recording room opposite direction, ie to the outside, shield.

According to an advantageous development, in a region of the heat-conducting sections facing away from the receiving space, an insulation, preferably flat, is arranged. In other words, it is advantageous if the Wärmeleitabschnitte are located between an adjacent wall and said insulation. Radiation losses are thus minimized. Preferably, the insulation is formed as an insulating mat, which is arranged on the inside of an outer wall of the dishwasher, wherein the condenser sections and the Wärmeleitabschnitte should extend between said outer wall and a receiving space defining wall. According to an advantageous development, the condenser sections and the heat-conducting sections are arranged below a wall formed as a bottom and bounding the receiving space to the outside, so that the heat released by the condenser sections is delivered upwards to the rinsing liquor collecting in the area of the bottom. Additionally or alternatively, the condenser sections can also be arranged in the region of the outside of one or more of the remaining walls. Furthermore, it is conceivable that the condenser is subdivided into a plurality of sections, wherein each section comprises a plurality of condenser sections and individual sections are arranged in the region of the outside of a plurality of walls.

According to an advantageous development, the condenser sections and the heat-conducting sections are arranged in a cavity, which is preferably bounded at least in sections in the direction of the receiving space by the outside of one or more of said walls. In this context, the term "cavity" is to be understood as a closed region in which the condenser sections (or at least sections thereof) and the heat-conducting sections (or at least sections thereof) are located Further components, or as further explained below, air and / or a heat storage material are.

Of course, the cavity may also include inlets and outlets and / or connections for air and / or water pipes, so that the cavity does not have to be hermetically sealed from the environment. Preferably, the cavity is arranged below the bottom wall forming the bottom of the receiving space.

In particular, it is conceivable for the cavity to have a depression and / or break-through, into or through which the pump sump of the dishwasher extends.

According to an advantageous development, the cavity has a hollow air receiving space with an air inlet and at least one air outlet. As a result, air can flow through the cavity, wherein the dishwasher for this preferably has a fan that accomplishes said air transport. Furthermore, it is advantageous if at least the air outlet is connected to an air line which opens into the receiving space, so that air exiting through the air outlet from the air receiving space can flow into the receiving space. If air is now transported into the air intake space during operation of the heat pump arrangement, this heat is taken up by the condenser. The heated air finally passes through the air outlet and the air line in the receiving space and is there to heat the rinsing water and / or the dishes during a water-carrying Teilspülgangs (eg during a pre-rinse or cleaning cycle) or during a drying cycle during which the items are dried should.

While the air inlet directly or via another air line with the environment of the dishwasher may be in communication (in this case, fresh air from outside the dishwasher in the recording room access), it is also conceivable that the air inlet via a corresponding air line with the up - Is close fluid space in fluid communication, so that air can be circulated. In this case, it is particularly advantageous, especially during the mentioned drying cycle, for the air leaving the receiving space to be cooled before it is again passed through the air receiving space in order to condense water vapor entrained from the receiving space and to increase the water absorption capacity of the air.

This can be achieved, for example, by virtue of the fact that the air after leaving the receiving space and before re-entering the air receiving space on a cold surface, e.g. the evaporator, is passed by. This is also useful, by the way, if the air is not circulated as described. For example, it would be conceivable that fresh air is supplied to the air intake space during the drying cycle, where it is heated and then supplied to the receiving space. After passing through the receiving space, the moist air is finally passed by the said cold surface before it leaves the dishwasher in the environment. Condensation of water vapor to surfaces surrounding the dishwasher (e.g., a kitchen cabinet) is thereby prevented.

According to an advantageous development, the heat-conducting sections have one or more ribs which protrude into the air-receiving space. As a result, the heat transfer between the heat-conducting sections and the air flowing through the air-receiving space is significantly increased compared to a solution without corresponding ribs. repaired. For example, the ribs can be made (at least predominantly) of metal and, for example, can be in direct contact with the heat-conducting sections. It is also conceivable that the heat-conducting sections (or a part thereof) and the ribs (or a part thereof) are part of a single component.

According to an advantageous development, a drying agent, preferably in the form of zeolite, is arranged inside the air intake space. If the air flowing into the air intake space comes into contact with the desiccant, it extracts moisture from the air. If the air dried in this way finally flows into the receiving space in a heated state during a drying cycle, the washware is dried very quickly. Finally, in order to be able to dry the desiccant after absorption of moisture, it is advantageous if the dishwasher comprises an electric heater with which the desiccant can be heated to temperatures between 200 ° C and 300 ° C to stored moisture from the Drip drying agent. The heating device is preferably an air heater which can heat air flowing through the air intake space to said temperatures. The air heater can be integrated, for example, in an air line connected to the air inlet.

According to an advantageous development, a storage space is arranged within the cavity, which is at least partially filled with a heat storage material, for example in the form of water or in the form of a latent heat storage material, the storage space with the condenser and / or Wärmeleitabschnit- th at least partially in thermally conductive Contact stands.

The storage space preferably directly adjoins the heat-conducting sections, wherein the heat-conducting sections should be located between the receiving space and the storage space. The arrangement of a corresponding storage space now has several advantages. First, the heat storage material contained therein during the operation of the heat pump assembly, the heat emitted by the condenser heat buffering. If heat in the receiving space is required in a subsequent partial wash cycle, air flows through the air intake space and in this case withdraws heat from the heat storage material, in order to then discharge it again to the washware or the wash liquor within the receiving space. In addition, heat can be released directly from the heat storage material via the Wärmeleitabschnitte to the rinse which contacts the wall which is in heat-conducting contact with the heat-conducting sections.

For example, it would be conceivable in this context that the heat pump arrangement is operated during a rinse cycle and in this case charges the heat storage material with heat. Finally, in the subsequent drying cycle, the operation of the heat pump arrangement can be dispensed with, since the heat required for drying the items to be washed is transferred from the heat storage material to air flowing through the air receiving space and finally to the items to be washed.

It is also conceivable that water is used as the heat storage material, which is heated within the storage space for a water-carrying, warm water, partial rinse cycle. In this case, water is passed into the storage space during or before the operation of the heat pump assembly, heated there during operation of the heat pump assembly and finally passed into the receiving space, where it is finally circulated to clean the dishes.

According to an advantageous development, the dishwasher has a heat storage, which is filled with a liquid, preferably water or can be filled via an inlet with said liquid, wherein the evaporator of the heat pump assembly extends at least partially into the interior of the heat storage, so that during operation of the Heat pump assembly heat from the liquid in the heat storage fluid can be transferred to the flowing through the evaporator heat transfer medium. The heat accumulator may, for example, be a water pocket which is arranged in the outwardly facing region of one or more lateral walls of the dishwasher.

The heat storage can also be either directly in contact with the wall (s). However, it is also conceivable that a wall insulation is attached between the heat sink and the wall or walls, which prevents or minimizes a heat transfer between the heat accumulator and the receiving space up to a defined temperature difference between said liquid and the receiving space. Furthermore, it is advantageous if the heat accumulator communicates with a fresh water connection, via which fresh water can be introduced into the heat accumulator. Wrd the heat storage filled with fresh water from a fresh water line, so this heats up when the dishwasher is not operating at ambient temperature. During operation of the dishwasher, this already preheated water finally reaches the receiving space (preferably during a pre-rinsing process in which coarse impurities are to be removed from the items to be washed). In return, further fresh water enters the heat accumulator, the fill level of which is preferably always kept constant.

During operation of the heat pump assembly, the water contained within the heat accumulator is also used as a heat source for evaporating the heat transfer medium flowing through the evaporator during operation of the heat pump assembly. As a result, the cached in the heat storage water is cooled and can eventually support the condensation of existing within the receiving space water vapor in a subsequent drying cycle, which passes on the wall adjacent to the heat storage. As a result, the water present in the heat accumulator is reheated and can be passed in a subsequent rinse again for cleaning items to be washed in the receiving space.

Furthermore, a method for cleaning and drying items to be washed in a receiving space of a dishwasher is proposed, wherein the dishwasher is preferably designed according to the previous and / or following description, wherein the individual features can be implemented individually or in combination.

The method provides that a heat pump arrangement of the dishwasher is operated during a cleaning and / or drying cycle of a washing program, wherein the cleaning cycle is designed to rid of existing impurities within a receiving space of the dishwasher and the drying cycle is designed, the dishes after to dry the cleaning. It is further provided that the heat emitted by a condenser of the heat pump assembly during its operation heat is partially discharged to an outside of the receiving space outside at least one wall of the dishwasher and from there to a present within the receiving space rinsing water and / or within the receiving space existing air.

According to the invention, a portion of the heat emitted during operation of the heat pump assembly heat at Wärmeleitabschnitte the dishwasher and discharged therefrom to the existing within the receiving space rinsing liquor and / or within the receiving space existing air.

In other words, the essence of the method according to the invention is thus to use the heat inevitably occurring during operation of the heat pump assembly to heat the rinsing liquor present within the receiving space or the air present in the receiving space during a cleaning and / or drying cycle, wherein the Heat is transferred from the condenser partly with the interposition of the above-described Wärmeleitabschnitte into the interior of the receiving space.

According to an advantageous development, air is passed through an air inlet into a cavity during the cleaning and / or drying cycle, in which the condenser is arranged, wherein the cavity is preferably arranged below the receiving space. The heat emitted by the condenser during operation of the heat pump arrangement is in this case partly transmitted to the air conducted into the cavity. Finally, the air heated within the cavity passes through an air outlet from the cavity and ultimately into the receiving space of the dishwasher to heat existing in the receiving space rinse and / or to dry the items under water intake.

Further embodiments and further developments of the method according to the invention are explained in the description of the claimed dishwasher and vice versa. The above-explained and / or reproduced in the subclaims advantageous embodiments and refinements of the invention can - in addition to z. B. in cases of clear dependencies or incompatible alternatives - individually or in any combination with each other.

The invention and its advantageous embodiments and further developments and advantages thereof are explained in more detail below with reference to drawings. They show, in each case in a schematic outline sketch:

1 shows an embodiment of a dishwashing machine according to the invention in a front view, and Figures 2 to 5 the lower portion of various embodiments of a dishwasher according to the invention, each cut in a plane parallel to the paper plane. In the following figures, corresponding parts are provided with the same reference numerals. In this case, only those components of a dishwasher are provided with reference numerals and explained, which are necessary for the understanding of the invention. It goes without saying that the dishwasher according to the invention can comprise further parts and assemblies.

FIG. 1 shows a schematic diagram of a possible embodiment of a dishwasher according to the invention.

The dishwashing machine has, as usual in the state of the art, a receiving space 1 which is bounded outwardly by a plurality of walls 2 and accommodates dishes (eg dishes) to be cleaned, not shown. The walls 2 are usually two lateral walls 2, a rear wall 2 extending parallel to the plane of the page, a front wall 2 extending parallel to the plane of the page, which is usually designed as a door or has such a wall, a ceiling wall and a lower wall The latter preferably has a depression or opening, wherein in the region of the depression or opening a pump sump 24 is formed, in which the washing liquor 26 collects, during a cleaning cycle via one or more Spülflottenleitungen 28 and with Help one circulating pump 25 one or more Sprüharmen 22 fed and finally sprayed onto the items to be washed (the flow direction of the wash liquor 26 is indicated by an arrow in the left vertical section of the Spülflottenleitung 28).

Furthermore, the dishwasher comprises a heat pump arrangement, which in turn comprises at least one evaporator 3, at least one compressor 4, at least one condenser 5 and at least one pressure reducer 6 through which a heat transfer material flowing within one or more lines 29 flows (the direction of flow is indicated by an arrow in the line section to the right of the compressor 4). With regard to the basic mode of operation of the heat pump arrangement, reference is made to the above description. In addition, the dishwasher may include a heat storage 37, which is preferably designed as a water pocket, which in turn is preferably arranged in the region of a lateral wall 2. The heat storage 37 may be, for example, a metal or plastic container. Furthermore, the heat accumulator 37 is preferably connected via a fresh water supply line 31 to a fresh water network, eg of a building, so that liquid 32 in the form of cold fresh water can flow into the heat accumulator 37 if the valve is not shown. If the fresh water is introduced into the heat accumulator 37 before operation of the dishwasher, then it can heat up to the beginning of a cleaning cycle to the ambient temperature, so that energy can be saved.

The possibly preheated to ambient temperature, water finally flows during the beginning of a cleaning cycle via a corresponding liquid line 27 into the receiving space 1. There, it collects initially in the region of the bottom 12 and the pump sump 24th

Preferably, the condenser 5 of the heat pump arrangement is now arranged in the region of the base 12, so that the heat generated by the condenser 5 is transferred via the lower wall 2 to the rinsing liquor 26 and / or the air present within the receiving space 1. Alternatively or additionally, the liquefier 5 could also be placed in the region of one or more of the remaining walls 2. After completion of the cleaning cycles or the wash liquor 26 is usually removed via a drain pump, not shown, from the dishwasher.

In a subsequent step, the drying of the dishes takes place. For this purpose, either fresh air is passed through an inlet not shown in the receiving space 1 or air is conveyed in recirculation mode through the receiving space 1 and an adjoining air duct.

The drying is supported by the heat storage 37, since the water therein was cooled during the previous or ongoing operation of the heat pump assembly by the evaporator 3, which extends into or through the interior of the heat accumulator 37. A wall insulation 30, which may be located between the heat accumulator 37 and the outside 8 of the adjacent side wall 2, should be designed in such a way that heat can be transferred from the water vapor present in the holding space 1 to the liquid 32 present in the heat accumulator 32 during the drying process. to cause condensation of the water vapor. At the same time, the wall insulation 30 should minimize excessive heat transfer from the wash liquor 26 to the liquid 32 present within the heat storage 37 during a cleaning cycle. Overall, the wall insulation 30 preferably has a heat transfer resistance R _T of at least 0.02 (K m ² ) / W, in particular between 0.1 (K m ² ) / W and 1 (K m ² ) / W. As a result, on the one hand, a sufficient thermal barrier or brake is provided for the heat energy introduced into the receiving space 1 of the dishwasher during a cleaning cycle with the rinse liquor to be heated, ie, it remains in the receiving space 1 of the dishwasher for the duration of the cleaning cycle, one for this partial rinse cycle required profile of the temporal temperature profile in the receiving space 1 can be maintained. This profile preferably corresponds approximately to the temporal temperature profile of the same partial wash cycle in a conventionally designed dishwasher (without heat pump arrangement). On the other hand, the weak thermal coupling effect of the wall insulation 30 suffices to cool the wall 2 at the end of the flushing cycle to which the heat accumulator 37 is attached, to cool sufficiently for a desired condensation drying with respect to the air and / or the items to be washed in the washing container, if the heat accumulator 37 previously was cooled by the heat pump assembly. This applies a fortiori, when the heat pump assembly continues to operate during the drying cycle, ie is switched on.

An advantageous embodiment of the lower region of the dishwasher is now shown in FIG. 2, wherein a corresponding structure is basically also conceivable in the region of a lateral wall 2 (this also applies to the other figures). Incidentally, the illustration corresponds in principle to a section of FIG. 1 running parallel to the plane of the page.

As can be seen from FIG. 2, the dishwasher according to the invention has a condenser 5, which comprises a plurality of condenser sections 7, which are in fluid communication with one another. For example, the condenser sections 7 may be formed by pipe sections 11, for example, in a plan view (ie in Figure 2 from above) meandering, spiraling or in any other shape. Of course, the condenser 5 has an inlet and an outlet for the heat transfer medium, which are not shown for clarity sake. The condenser sections 7 preferably extend within a cavity 13 extending below the receiving space 1, which can be delimited, for example, by a separate substructure 36, and which is also advantageously insulated towards the bottom by an insulation 33 towards the outside. Furthermore, it is apparent from FIG. 2 that the condenser sections 7 are in direct, at least heat-conducting, contact with heat-conducting sections 9, it being advantageous for the heat-conducting sections 9 (which can be part of one or more components) to have recesses 23 that the condenser sections 7 extend at least in sections and that may, for example, be channel-shaped (for reasons of clarity, no condenser section 7 is shown in the second recess 23 from the left, of course, a corresponding condenser section 7 should also run there).

In any case, the condenser sections 7 are at least partially so placed between the lower wall 2 and the Wärmeleitabschnitten 9 placed that discharged during operation of the heat pump assembly from the condenser 5 heat via the Wärmeleitabschnitte 9 to the lower wall 2 and finally to the inside of the receiving space 1 existing rinsing liquid 26 or air can be forwarded. Since the heat-conducting sections 9 also surround the condenser sections 7 in the area facing away from the lower wall 2, the heat given off at the bottom is also forwarded via the heat-conducting sections 9 into the receiving space 1. In this case, the heat-conducting sections 9 form a cover 10 of the condenser sections 7. FIG. 3 shows an advantageous development.

In contrast to Figure 2 here are connected to the cavity 13 and opening into an air inlet 15 air inlet 34, an air outlet 16 and the cavity 13 with the receiving space 1 connecting air line 17 is present. The cavity 13 thus has an air intake space 14 through which air can flow, for which purpose, for example, a fan of the dishwasher can be responsible. Incidentally, the air inlet 34 can also be connected to the receiving space 1 via an air line 17 be connected or open into the environment of the dishwasher to be able to suck in fresh air.

If air now flows through the air inlet 15 into the air intake chamber 14 during operation of the heat pump arrangement, then it is heated by the contact with the heat-conducting sections 9 and finally flows in a heated state via the air line 17 into the receiving space 1, there to the rinsing liquor 26 and / or to warm the dishes. In order to improve the heat transfer between the air and the Wärmeleitabschnitten 9, ribs 18 may be present, which are preferably directly with the Wärmeleitabschnitten 9 in connection or are part of the same and which protrude into the air receiving space 14. Figure 4 shows a solution in which the cavity 13 forms, in addition to the condenser sections 7 and the heat-conducting sections 9, a reservoir 20 which is wholly or partially filled with a heat storage material 21, e.g. Water or a latent heat storage material is filled. This has the advantage that the heat emitted by the condenser sections 7, which can not be forwarded directly into the receiving space 1, can be temporarily stored. The heat stored in the heat storage material 21 may finally be heated at a later time, e.g. a later Teilspülgang, are introduced via the Wärmeleitabschnitte 9 in the receiving space 1. Energy efficiency can be further improved as a result.

Finally, a possible embodiment is shown in FIG. 5, in which a portion of the cavity 13 separated by means of a dividing wall 35, which is filled with a desiccant 19, and which in turn is described in connection with FIG. 3, is arranged beneath said storage space 20 Air inlet 15 and an air outlet 16 is equipped (not shown in Figure 5).

In the air intake chamber 14 shown in FIG. 5, finally, a desiccant 19 is arranged, on which air must flow before it enters the receiving space 1. As a result, the moisture content of the air decreases, so that their water absorption capacity increases. This is particularly advantageous if the air flows through the cavity 13 or its air intake chamber 14 during a drying cycle. Incidentally, the invention is not limited to the illustrated embodiment. Rather, all combinations of the individual features described, as shown or described in the claims, the description and the figures and as far as a corresponding combination is technically possible or seems reasonable, the subject of the invention.

LIST OF REFERENCE NUMBERS

1st recording room

2nd wall

3rd evaporator

4th compressor

5. Condenser

6. Pressure reducer

7. Condenser section

8. Outside of the wall

9. Wärmeleitabschnitt

10. cover

1 1st pipe section

12th floor

13. cavity

14. Air intake room

15. Air intake

16. Air outlet

17. Air line

18th rib

19. Desiccant

20th storey room

21. heat storage material

22nd spray arm

23rd deepening

24. Pump sump

25. Circulation pump

26. rinsing liquor

27. Liquid line

28. Flushing Fleet Line

29. Conduit for heat transfer medium

30. Wall insulation

31. Fresh water supply

32. Liquid

33. insulation

34. Air intake

35. Partition 36. Substructure

37. Heat storage

Claims

Dishwasher for cleaning items to be washed during one or more water-carrying Teilspülgängen and for subsequent drying of the dishes during a subsections or the sub-washing subordinate drying cycle, - with a receiving space (1) for receiving the items to be cleaned, wherein the receiving space (1) by a plurality of walls (2) is limited to the outside,

comprising at least one heat pump arrangement comprising a heat transfer medium, the heat pump arrangement comprising an evaporator (3), a compressor (4), a condenser (5) and a pressure reducer (6),

- wherein the condenser (5) comprises a plurality of fluidly connected condenser sections (7) through which the heat transfer medium flows during operation of the heat pump assembly, and thus on a receiving space (1) facing away from the outside (8) of one or more of said walls ( 2) are arranged so that the heat emitted by the condenser (5) during the operation of the heat pump assembly heat via the respective adjacent wall (2) in the receiving space (1) is discharged, characterized in that

the dishwasher comprises heat-conducting sections (9) which are in heat-conducting contact with at least part of the condenser sections (7) and with at least the outside (8) of one of said walls (2) in order to control the heat conduction from the heat-conducting sections (9) Contact improving condenser sections (7) in the receiving space (1) to improve.

Dishwasher according to the preceding claim, characterized in that at least part of the condenser sections (7) extends at least in sections between the outside (8) of at least one of said walls (2) and one or more heat-conducting sections (9).

Dishwasher according to one of the preceding claims, characterized in that the heat-conducting sections (9) form one or more covers (10) which at least partially cover the condenser sections (7) in a direction away from the receiving space (1).

4. Dishwasher according to one of the preceding claims, characterized in that the condenser sections (7) are formed by pipe sections (1 1) of one or more pipeline systems which preferably run at least in sections in one plane.

5. Dishwasher according to claims 4 and 5, characterized in that the cover (10) recesses (23), and that the pipe sections (11) extend at least in sections within the recesses (23).

6. Dishwasher according to one of the preceding claims, characterized in that the Wärmeleitabschnitte (9) in sections with the outer side (8) at least one wall (2) are in direct contact.

7. Dishwasher according to one of the preceding claims, characterized in that in a receiving space (1) facing away from the region of the Wärmeleitabschnitte (9), a preferably flat design, insulation (33) is arranged.

8. Dishwasher according to one of the preceding claims, characterized in that the condenser sections (7) and the heat-conducting sections (9) are arranged under a bottom (12) and the receiving space (1) outwardly bounding wall (2).

9. Dishwasher according to one of the preceding claims, characterized in that the Verflüssigerabschnitte (7) and the Wärmeleitabschnitte (9) are arranged in a cavity (13), preferably in the direction of the receiving space (1) at least partially through the outer side (8). one or more of said walls (2) is limited.

Dishwasher according to the preceding claim, characterized in that the cavity (13) has a hollow air receiving space (14) with an air inlet (15) and at least one air outlet (16), so that air can flow through the cavity (13), and wherein at least the air outlet (16) is connected to an air line (17) which opens into the receiving space (1), so that via the air outlet (16) emerging from the cavity (13)

Air in the receiving space (1) can flow.

1 1. Dishwasher according to the preceding claim, characterized in that the Wärmeleitabschnitte (9) ribs (18) which protrude into the air receiving space (14).

12. Dishwasher according to claim 10 or 1 1, characterized in that within the air receiving space (14) a desiccant (19), preferably in the form of zeolite, is arranged.

13. Dishwasher according to one of claims 9 to 12, characterized in that within the cavity (13) a storage space (20) is arranged, which at least partially with a heat storage material (21), for example in the form of water or in the form of a Latent heat storage material is filled, wherein the storage space (20) with the condenser sections (7) and / or the Wärmeleitabschnitten (9) is at least partially in heat-conducting contact.

14. Dishwasher according to one of the preceding claims, characterized in that the dishwasher has a heat storage (37) which is filled with a liquid, preferably water or can be filled via an inlet with said liquid, wherein the evaporator (3) of the heat pump assembly extends at least partially into the interior of the heat accumulator (37), so that during operation of the heat pump assembly heat from the in the heat accumulator (37) located liquid on the through the evaporator (3) flowing heat transfer medium is transferable.

15. A method for cleaning and drying items to be washed in a receiving space (1) of a dishwasher, wherein the dishwasher is preferably designed according to one of the preceding claims,

wherein a heat pump arrangement of the dishwasher is operated during a cleaning and / or drying cycle of a washing program,

- wherein the heat emitted by a condenser (5) of the heat pump assembly during operation partially to a the receiving space (1) facing away from the outside (8) at least one wall (2) of the dishwasher and from there to a within the receiving space (1) existing rinsing liquor (26) and / or within the receiving space (1) existing air is discharged,

characterized in that a portion of the heat emitted during operation of the heat pump assembly heat to Wärmeleitabschnitte (9) of the dishwasher and from there to the within the receiving space (1) existing rinsing liquor (26) and / or within the receiving space (1) existing air is discharged.

16. The method according to the preceding claim, characterized in that during the cleaning and / or drying cycle air via an air inlet (15) in a cavity (13) is passed, in which the condenser (5) is arranged, said Liquefied (5) heat is partially transferred to the guided into the cavity (13) air, and that within the cavity (13) heated air exits through an air outlet (16) from the cavity (13) and then into the receiving space ( 1) of the dishwasher is passed to heat in the receiving space (1) existing rinsing liquor (26) and / or to dry the items to be washed.