DE102009028302A1 - Dishwasher with at least one air heater - Google Patents

Abstract

A dishwasher (GS), in particular HaushPB) for holding crockery, cutlery or similar items to be cleaned, air (LU) contained in the wash cabinet (SPB) through a line area (LK) of a drying device that can be heated by an electric heater (HZ). TS) can be supplied in such a way that at least one inner wall surface (W) of at least the line area (LK) is provided with an electrical insulator (IS) extending in front of it.

Description

The The invention relates to a dishwasher, in particular a household dishwasher, with a dishwasher for holding dishes, cutlery or the like too cleaning dishes, with air from the sink a drying device can be fed and this passes through a conduit area provided with an air heating, according to the preamble of claim 1.

It is known, for. B. from the DE 103 53 774 A1 , of the DE 103 53 775 A1 or the DE 10 2005 004 096 A1 to provide a dishwasher with a drying device comprising a so-called sorption column for drying crockery. In this case, in the partial program step "drying" of the respective dishwashing program of the dishwasher for drying dishes, humid air from the washing compartment of the dishwasher is passed through the sorption column by means of a blower and moisture is removed from the air through which it is reversibly dehydratable by condensing moisture. For regeneration, ie desorption of the sorption column, the reversibly dehydratable dry material is heated to very high temperatures. Water stored in this material thereby emerges as hot water vapor and is conducted into the rinsing container by means of an air flow generated by means of the blower. As a result, a rinsing liquor and / or a washware located in the washing, such. As dishes, and the air in the washing container are heated. Such a sorption column has proven to be very advantageous for an energy-saving and quiet drying of the dishes. To avoid local overheating of the dry material during the desorption z. B. in the DE 10 2005 004 096 A1 a heater arranged in the flow direction of the air in front of the air inlet of the sorption column.

For Such air heating is known, a tubular heater be provided, in which a heating wire located inside with a electrical insulation is provided. Such a heater points However, a large thermal mass on and needed because of The relatively small surface has a high working temperature.

These Disadvantages can avoid wire air heating, in which the heating wire directly releases its heat into the air. An execution is for example an uninsulated heating wire, which is about one Carrier wound and placed in a metallic tube can be.

One Such metal pipe offers high stability and temperature resistance at comparatively low cost. It can be however, in conjunction with the high moisture content of the passed Air easily unwanted leakage currents from the Form heating to the metal pipe.

Of the Invention is based on the problem with a dishwasher with drying device an efficient and cost-effective, to allow electrically stable heating of the air.

The Invention solves this problem by a dishwasher with the features of claim 1.

With the invention provides a dishwasher, the one air heating for the operation of a drying device even in a humid environment. The danger of unwanted leakage currents or similar discharges between a heater and a surrounding wall is characterized at least one inner wall surface of at least the Line area with a flat in front of this extended provided electrical insulator, significantly reduced and in the practice therefore no longer relevant.

For optimum electrical strength and operational safety the electrical insulator preferably over the entire surface before inner wall surface extends.

In spite of the electrical insulation, the line area in particular comprise a stable and lightweight thin-walled metal tube. This is preferably inside with the electrical insulator coated. Instead of the coating can also be an insulating Inner tube or an electrically insulating, d. H. non-conductive, Inner sleeve formed and retracted as a separate unit or an insulating tube in total, for example a ceramic tube, without a metallic base tube. Such a thing Ceramic tube, however, can provide sufficient mechanical Stability possibly a larger wall thickness and concomitantly a greater thickness or a larger outside diameter than one Outer tube, in particular metal tube with electrically insulating Inner coating or inner shell on or in front of the inner wall necessitate, so that the latter construction variant for cramped space in a dishwasher is more advantageous. An electrically insulating coating on the inner wall of an outer protective tube, in particular outer Metal tube, in which the electric heating device, in particular whose bare heating wire is housed, so helps one Conduction area, the wall thickness and outer diameter smaller as can be in the case of a ceramic tube.

Particularly cost-effective, the electrical insulator can be formed by enamelling, which can be applied in a simple dipping process. Also a vapor deposition or another type of coating is possible.

The Heating can be very efficient after an advantageous development Heat transfer to air at least one electrical not isolated, d. H. include bare heating wire.

Further is the installation of the line area after a convenient Development of the invention advantageously simplified by this in a press fit in a drying room comprising an adsorber is plugged in for air contained in the sink.

Also an inner wall surface of the one adsorber comprehensive Drying room can be extended with a flat in front of this be provided electrical insulator and also - at least partially - heated by means of an electric heater to increase efficiency.

other advantageous embodiments and further developments of the invention are in the Subclaims reproduced.

The explained above and / or in the subclaims reproduced advantageous embodiments and further developments of the invention You can do this individually or in any combination with each other in the dishwasher according to the invention come into use.

The Invention and its developments and their advantages will be below explained in more detail with reference to drawings.

It demonstrate:

1 a schematic front view of a dishwasher in a possible embodiment of the invention,

2 a similar view as 1 a slightly modified embodiment of a dishwasher according to the invention with a washing container in which only a single, lower dish rack is shown by way of example, and with a schematically drawn electric heating device in a line region which introduces air into a drying space receiving the adsorber,

3 a schematic detail enlargement of leading into the drying space for receiving the adsorber and provided with the heating device line region of 2 , and

4 a schematic cross-sectional view of the equipped with the electric heating device power range of 3 ,

Elements with the same function and mode of action are in the 1 4 each provided with the same reference numerals.

A Dishwasher according to the invention, In particular, household dishwasher can be alone stationary or built-in or installable device, for example, within a kitchenette, train.

In the 1 illustrated domestic dishwasher GS includes as main components a washing container SPB, a bottom assembly arranged below BG and a drying device, in particular Sorptionstrocknungseinrichtung TS. This is preferably external, ie outside of the washing container SPB (viewed from the inside outwards), partly behind a side wall SW of the washing container, ie outside on the side wall SW, and partly in the bottom assembly BG, provided. It comprises as main components at least one suction opening ALA, at least one air line RA1 for sucked from the washing air LU, at least one fan unit or a fan LT, at least one downstream sorption or drying tank SB, in which an adsorber, z. B. zeolite ZEO, a back into the washing compartment SPB outlet opening OFF, through the dried in the respective sorption of Sorptionstrockner TS dried air LS2 is returned to the washing compartment SPB, and at least one line region or line section LK from the fan unit LT to the sorbent SB ,

In the washing container SPB are preferably one or more grid baskets GK for receiving items such. As tableware (see 2 , shown there only with a lower basket), housed. To spray the items to be cleaned with a liquid, one or more spraying devices, such. B. one or more rotating spray arms SA, provided inside the washing container SPB. In the embodiment according to 1 In the washing container SPB, both a lower spray arm SA and an upper spray arm SA are provided and in each case suspended in rotation about a vertical axis.

Dishwashers undergo washing programs that have a plurality of program steps for cleaning items to be washed. The respective washing program may comprise, in particular, the following individual program steps taking place one after the other: a pre-rinsing step for removing coarse soiling, a cleaning step with detergent addition to liquid or water, an intermediate rinse step for removing dirt and detergent residues, a rinse step with applying rinsed with detergent or rinse liquid or water and a final drying step in which the cleaned items to be dried. Depending on the cleaning step or rinsing process of a selected dishwasher while fresh water and / or service water added with detergent z. B. for a cleaning process, or fresh water and / or service water for a prewash, and / or added with rinse aid added fresh water and / or service water for a rinse on the respective items to be washed, in particular sprayed.

The Fan unit LT and the sorption or drying tank SB are here in the embodiment in the bottom assembly BG below the bottom BO of the washing container SPB accommodated. The air line runs from the intake opening ALA, which is above the bottom BO of the rinse tank SBP is provided in the side wall SW, outside of this Side wall SW with a first pipe section RA1 down to Fan unit LT in the floor assembly BG. This fan unit LT causes the intake of the air and its forwarding - here essentially in a horizontal direction - within the equipped with an electric heater HZ1 Line area LK to sorption SB. This line area LK is thus through a section of the air duct formed the Sorptionstrocknungseinrichtung TS. Here in the embodiment this line section connects the fan unit LT with the sorption tank SB. This line section LK can typically be ten to twenty centimeters long. He is by means of the internally arranged electrical heating device HZ1 heatable. about the line area LK is the output of the fan unit LT with an inlet opening of the sorption container SB connected in its near-ground area.

The Suction opening ALA of the washing container SPB is preferably in the middle region or in the upper region of the side wall SW for sucking air LU from the inside of the washing container SPB provided. Alternatively, it goes without saying possible, the intake opening ALA in another Side wall, rear wall, and / or ceiling wall of the washing compartment To install SPB. In general, it is in particular advantageous, the suction or inlet opening preferably at least above a foam level to which foam is added in a cleaning process can provide provided. expedient if necessary, it can also be several intake openings or inflow openings in at least one side wall, Ceiling wall, and / or the rear wall of the washing container SPB let in and this via at least one air duct with one or more inlet openings in the housing of the sorption or drying tank SB to connect.

The Fan unit LT is preferably as axial fan educated. It is used for sorption operation or drying operation the sorption drying device TS of the forced flow a sorption unit SE in the sorption container SB with moist-hot air LU from the rinse tank SPB, which after the rinse, in particular after carrying out several partial rinses, of the respective dishwashing program in the washing container SPB is present. The sorption unit SE contains reversible Dehydratable sorbent ZEO such. As zeolite, the moisture from the guided through it air LS1 record and store can, whereby the air is dried. The sorption container SB has in the near-ceiling region of its housing on the Top of an outflow opening, which has a Outlet opening OFF through an insertion opening in the bottom of the washing container SPB with its interior connected is. This way, during a sorption process or drying step of a. Dishwashing program for Drying wet-cleaned ware wet-hot Air LU from the inside of the washing container SPB through the intake opening ALA through the switched-on Fan unit LT in the inlet-side pipe section RA1 be sucked in the air duct and over the heated with the electric heater HZ1 line area LK into the interior of the sorption container SB for forced flow transported the reversibly dehydratable sorbent ZEO become. The sorption material ZEO pulls out of the flowing, wet air out water, so after the sorption unit SE dried air through the outlet opening OFF in the interior of the washing container SPB be blown can. In this way is a closed air circulation system provided by this sorption drying device TS. While the respective sorption operation is the heating device HZ1 preferably turned off, so that the drying of moist Air alone causes moisture to escape from the air flowing air from the sorbent ZEO, in particular Zeolite, recorded, in particular bound or stored. The heating device HZ1 may supportive, d. H. additionally during the respective drying process by means of be switched on the sorbent material, if the capacity sorbent material with liquid adsorbing, in particular water adsorbing, effect in sorbent tank SB for a desired drying process is not sufficient, such as B. runs too slow.

At least the mentioned line area LK is provided with the heating device HZ1 in its interior in order to heat the respective desorption process for regenerating, ie dehumidifying the sorbent material, the air flowing through LS1 to a high temperature of for example 300 ° C to 400 ° C. This desorption or dehumidification process is preferably carried out during a subsequent, newly started dishwashing program. In particular, the desorption during one or more Teilspülvorgänge this newly started Geschirrspülprogramms during or which rinsing liquor liquid by means of a heating device in the liquid circuit of the dishwasher for spraying over at least one spraying device such. B. rotating spray arms SA is heated. The other components of this fluid circuit are in the 1 . 2 have been omitted for the sake of clarity of drawing. In addition, a part of the first heating device, which is provided in the input-side line region LK in front of the sorption container SB, or a separate second heating device can also be arranged in the sorption container SB above and / or below the sorption material ZEO and / or in the sorption material itself. In the 1 . 2 In addition to the first electric heating device HZ1, a second heating device HZ2 is arranged in the sorption container SB below the sorption unit SE. Possibly. it may also be expedient according to an alternative embodiment variant, if the first heating device HZ1 is omitted in the power section LK and the second heating device HZ2 is provided only in the sorption SB, which also forms an air duct area yes.

At least the here tubular, inner wall surface W of the line region LK, in which the first electrical heating device HZ1 is housed, is provided here in the exemplary embodiment with an area extending in front of this, electrical insulator, which is not shown separately in the schematic drawing figures, but in the enlarged one 3 located and provided with the reference symbol IS. According to the exemplary embodiment, the electrical insulator IS extends over the entire surface in front of the inner wall surface W, so that at least in the line region LK, in which the first electrical heating device HZ1 is arranged in the interior, the inner wall surface W is completely insulated, ie completely electrically insulated. In other words, in front of the inner wall surface of the tubular conduit section LK, that region in which the first electrical heating device HZ1 is provided has at least one electrical insulation sheath.

there is the electrical insulation IS expediently also very stable thermally, in particular up to temperatures of over 400 ° C, designed to provide a high heating current in the heating wire DR of the heating device HZ1 to flow.

The Electrical insulation IS can be achieved in different ways become. Particularly inexpensive, the electrical insulator IS by at least one coating or at least one coating at least on the inner wall surface W of the conduit section LK be provided, in which the first electric heating device HZ1 is housed. This can then z. B. a substrate for this electrically insulating coating is a thin-walled and yet stable metal tube lining the inside wall side, the without the electrical insulation IS electrically conductive would be and therefore the disadvantages mentioned above the leakage currents and leakage currents would show. The metal pipe for the line area LK can therefore be considered as favorable Standard component to be purchased, leaving only the elktrisch insulating coating is applied to it.

A Such electrical insulation IS can, for example, by a Be formed ceramic coating. Especially cheap and easy However, it is in the production when the electrical insulation IS formed by an enamel coating, which in a dip, without additional requirements such as a clean room or a vacuum, Can be applied on a large scale. A thickness of the insulating coating IS of about 200 microns is i. a. sufficient. Also vapor deposition or other coating methods are possible.

By a dipping process, such as enamelling automatically and without further measures also the outside as well as the front edges of the line area LK with isolated and protected. More generally, therefore, the outer Protective tube advantageously around, d. H. interior wall side, outside wall side and possibly also on his frontal side Edges with an electrically insulating coating or a be provided electrically insulating coating. At least is but the inside wall insulation provided.

With The coating is also a side effect of corrosion resistance the underlying support tube improves since this then no longer in direct contact with the humid air LS1 inside can occur. It can therefore be a more corrosion-sensitive (and cheaper) Metal used, so the extra work for the Coating can be largely compensated. Also for this is an enamelling with the protection of the front edges and outsides advantageous.

Also, the use of an anodized or Hard anodized aluminum tube or aluminum alloys for the air line pipe section in which the electric heating device is housed, is possible. Such a tube may also be coated at least on its inner wall surface with at least one electrically insulating layer.

As well Is it possible that the electrical insulation IS through a separate component, in particular sleeve component formed is, about a ceramic sleeve, in the line section LK can be inserted. Such training comes in particular then considered, if the restriction caused thereby the inner cross-section is well tolerated.

Also It is possible that dispensed with a support tube and instead ceramic structures or a ceramic tube is used is, however, which has a high wall thickness compared to a metal tube (typically> 3 millimeters instead of <1 mm) and thus requires a larger space.

With said insulation IS, the respective heating device HZ1 or HZ2 at least one electrically non-isolated, d h. bare heating wire include particularly effective high temperatures, because only the thin, bare wire itself is heated, and this directly with the air LS1 without interposition of a it comes into contact with the surrounding insulation or from the air LS1 is flowed around, for the respective desorption process the moisture stored in the sorption material ZEO as it flows through pick up the sorption container and place it in the rinsing container be transported away.

A such insulation IS can be found according to the invention then only on the respective wall such. B. W of the line area such as B. LK, whereas the respective electrical heating device such z. B. HZ1 of which can remain unloaded. In any case are through the invention significantly increases the creepage distances.

As in the 1 and 2 is indicated, the pipe section LK can be inserted in a press fit in the adsorber ZEO comprehensive drying container SB, thereby allowing a particularly simple and quick plug-in mounting without the attachment of further securing means.

there can also be an inner wall surface of the adsorber ZEO receiving sorption or drying vessel SB with a flat in front of the inner wall surface extended be provided with electrical insulator, so also one in this Room SB arranged heating device as here z. B. HZ2 or a partly up to this extended heating device or Heating area against the walls of this container SB is isolated. For training also this isolation IS again the o. G. Options. The electric insulating construction of the line region LK with the first Electric heating device HZ1 can accordingly in particular on the area provided with an electric heater be transferred to the sorbent SB, if there is a part of the first heating device HZ1 or a second, electric heating device such. B. HZ2 is housed.

additionally to the inner wall surface of the line region LK and / or the drying room SB also on the outside and on the front edges - as in described the enameling - with a flat extended electrical insulator be provided to the insulation to the outside to improve and protect the user and the material.

Thereby, that in a section of an air duct area, in particular an air duct or air duct, a bare Heating wire with loose and non-contact turns as well largely contactless to the inner wall surface the tubular portion is housed, and viewed radially from inside to outside in front of the inner wall surface this subsection of the air duct area at least one electrical Insulation layer or insulation shell is provided Creepage distances or discharge lines, in particular also electrically conductive air gaps, beyond the impermissible electrical leakage to the outside Air duct or outer tube of the air duct could flow in a reliable way be avoided. In this way is an open wire air heater provided in a high humidity and / or Condensation or condensation impacted environment, in particular the Luftleitrohrs and / or the sorption, flawless works without causing excessive electrical Creepage currents, in particular ground currents over the outer protective tube of the line region and / or can come to the housing of the sorption. In this way, the dishwasher according to the invention is electric safe to operate.

The bare, uninsulated heating wire is expediently applied to at least one carrier element. 4 shows the line section LK with the wire-air heater HZ1 of 1 in a schematic cross-sectional view in a section perpendicular to the longitudinal longitudinal extent of the line section LK. In the embodiment of 4 the non-insulating heating wire DR is wound onto a cross-shaped supporting frame T. He can, for example, with helical or spiralförmi ge turns along the longitudinal extension of the support frame T to be wrapped around this helically. Generally speaking, the bare heating wire DR is wound around the support frame T such that adjacent turns of the heating wire are spaced from each other as well as from the inner wall surface of the electrically insulated protective tube of the air duct and / or the housing of the sorbent container to the gap LUC, ie with a gap clearance are. In this case, only the cross-shaped support frame T is supported with its ends on the electrically insulating inner layer IS of the protective tube LK, while the bare heating wire is held exposed on the support frame T. For the support frame T an electrically insulating material is also used in an advantageous manner. The support frame T and the winding with the heating wire are designed such that the heating wire occupies the respective flow cross-section of the protective tube and / or the housing of the sorption as evenly as possible and can be freely flowed around by air. This allows an efficient heat transfer from the heating wire to the air flowing through. Because compared to a conventional tubular heater, wherein the inner heating wire arranged opposite the inner surface of the tubular heater by a filling with electrically insulating filling material such. B. magnesium oxides is isolated, is now a much larger air contact surface by the variety of bare Heizdrahtwindungen ready. The outer tube of a conventional tubular heater as well as its inner filler material, which was previously associated with a high thermal mass and a high operating temperature, now falls away in the wire-air heating according to the invention.

Because in the wire-air heating according to the invention the bare heating wire with largely free, d. H. noncontact Windings laid and can heat directly, d. H. immediate to the through the outer pipe and / or the housing of the sorption container flowing through Release air. This leaves the flow cross section the outer conduit and / or the housing of the sorption container in the area of the support frame wound heating wire largely flowed through by air, d. H. too high pressure losses due to obstruction of the flow cross-section such as B. by a conventional tubular heater largely avoided. In addition, it can be the diameter of one equipped with a wire-air heater according to the invention Conduit compared to the diameter of a protective tube, housed in a conventional tubular heater is, reduce what the placement of the air duct and / or of the sorption container in the confined space of the floor assembly simplified.

In summary considered is thus the structure of an open wire heating in one characterized by high humidity and / or condensation environment allows. Creepage leakage currents are in Case of condensation of moisture in the air heating system largely avoided.

The following Alternative embodiments may be appropriate In particular, a metal tube, in front of the inner wall at least at least an electrical insulation is arranged, for a sufficient mechanical stability and temperature resistance deploy at a reasonable cost. The distances between Inner wall of the protective tube and heating wire may be due of the available space to minimal required Distance from each other be interpreted, since now an electrical Insulator as intermediate layer or intermediate shell between the outer metal tube and the heating wire is provided. In this way, electrical requirements for air / creepage distances and maximum leakage currents safely adhered to become.

By the electrical insulation in front of the inner wall of the metal tube are the heating wire system leakage currents over the Insulating wire suspension to this thermowell also at high humidity such. B. in the sorption of Sorptionstrocknungseinrichtung TS largely avoided. In particular, are impermissibly high Leakage currents, especially with condensation and pollution inadmissible high values, largely avoided.

alternative in particular to a metal tube with internal internal wall insulation be appropriate, between the heating wire and the Inner wall of the metal tube an electrically insulating sleeve such as B. ceramic sleeve. Optionally if necessary also to avoid leakage currents only ceramic structures or a ceramic tube can be used. These but can be higher compared to the metal tube Wall thicknesses (> 3 mm instead of <1 mm) and thus require a larger installation space and have a poorer mechanical stability.

On the other hand, it is more advantageous to maintain the thin-walled stable metal tube and to coat it with an electrically insulating, temperature-stable layer. This can be z. B. be enamelling. The advantage here is the significant increase or extension of creepage distances and clearances that have a strong influence on the leakage currents, with the aim of compliance with the safety requirements, electrical requirements for creepage distances and associated leakage, in particular grounding currents. The coating overhead can by Verwen Part of a more corrosion-sensitive material for the outer protective tube are partially compensated, which is less expensive.

• – eloxiertes oder harteloxiertes Aluminiumrohr (natürlich auch Alu-Legierungen verwendbar),
• – eloxiertes Aluminiumrohr mit elektrisch isolierender Beschichtung, zumindest an deren Innenwandfläche, um ggf. Fehlstellen in der Beschichtung abzudecken.

Additionally or independently thereof, the following alternative constructions for the outer protective tube may be suitably used:

• - anodized or hard anodized aluminum tube (of course also aluminum alloys usable),
• - Anodized aluminum tube with electrically insulating coating, at least on the inner wall surface to cover any defects in the coating.

In particular, it may also be appropriate if instead of or in addition to the electrically insulating inner coating an electrically insulating sleeve in the free space between the support frame such. B. T (see 3 . 4 ), on which the bare heating wire such. B. DR is wound up, and the inner wall such. B. W of the outer protective tube, in particular metal tube such. B. LK is provided. A metal tube has a high mechanical stability, high thermal stability and a simple and inexpensive production. The thermal resistance of the metal tube is required in particular during the desorption of the sorption drying TS when dehumidified by the heating wire DR of the respective electric heating device HZ1 or HZ2 the sorbent material ZEO in the sorption to its regeneration, ie is dried because of high temperatures, in particular between 250 ° C and 400 ° C, of the heating wire are used.

LIST OF REFERENCE NUMBERS

• GS

  Dishwasher,

  SPB

  rinse tank,

  SA

  spray arm,

  SW

  side,

  BG

  Underbody,

  GK

  Dish rack,

  ALA

  intake,

  RA1

  1st pipe section,

  LT

  Fan,

  LK

  Line area,

  LU

  Air in the dishwasher,

  LS1

  Air flow in the line area,

  W

  inner wall surface,

  IS

  electrical insulation,

  HZ1, HZ2

  electric heating device,

  SB

  Sorption or drying container,

  SE

  sorption,

  ZEO

  Adsorbent / sorbent

  OUT

  outlet,

  LS2

  in the dishwasher recirculated air

  LUC

  gap

  DR

  heating wire

  T

  support frame

  TS

  sorption drying

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10353774 A1 [0002]
• - DE 10353775 A1 [0002]
• DE 102005004096 A1 [0002, 0002]

Claims (12)

Dishwasher (GS), in particular domestic dishwasher, with a washing container (SPB) for holding dishes, cutlery or similar items to be cleaned, wherein air (LU) contained in the washing compartment (SPB) is heated by an electrical heating (HZ). LK) a drying device (TS) can be fed, characterized in that at least one inner wall surface (W) at least of the line region (LK) is provided with a flat extending in front of this electrical insulator (IS). Dishwasher (GS) according to claim 1, characterized in that the electrical insulator (IS) extends over the entire surface in front of the inner wall surface (W) is. Dishwasher (GS) according to one of the claims 1 or 2, characterized in that the electrical insulator (IS) forms a coating of the inner wall surface (W). Dishwasher (GS) according to one of the preceding Claims, characterized in that the line area (LK) comprises a thin-walled metal tube. Dishwasher (GS) according to one of the preceding Claims, characterized in that the electrical Insulator (IS) thermally stable up to over 400 ° C is. Dishwasher (GS) according to one of the preceding Claims, characterized in that the electrical Insulator (IS) is formed by a ceramic coating. Dishwasher (GS) according to one of the preceding Claims, characterized in that the electrical Insulator (IS) is formed by enamelling. Dishwasher (GS) according to one of the preceding Claims, characterized in that the heating (HZ) comprises at least one electrically non-insulated heating wire. Dishwasher (GS) according to one of the preceding Claims, characterized in that the line area (LK) in a press fit into an adsorber (ZEO) comprehensive Drying container (SB) for in the rinsing container (SPB) is plugged in. Dishwasher (GS) according to one of the preceding Claims, characterized in that also a inner wall surface of the one adsorber (ZEO) comprising Drying container (SB) with a surface before this extended electrical insulator (IS) is provided. Dishwasher (GS) according to one of the preceding Claims, characterized in that the line area (LK) and / or the drying tank (SB) on the outside provided with a flat-extending electrical insulator is. Dishwasher (GS) according to one of the preceding Claims, characterized in that the line area (LK) and / or the drying container (SB) at its edge regions with provided a flat-extending electrical insulator is.

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