EP3213666A1 - Dishwasher - Google Patents

Abstract

The invention relates to a dishwasher, in particular a program-controlled domestic dishwasher, having a washing compartment (5) for receiving items to be cleaned and a condensation dryer (26) for externally loading a side wall (15) of the washing compartment (5) with outside air (5). 10), characterized in that the condensation dryer (26) is formed fan-free and an air supply channel (17), the air inlet side provides a diffuser-shaped extension (19) of the flow cross-section.

Description

The invention relates to a dishwasher, in particular a program-controlled domestic dishwasher, with a washing compartment providing a washing compartment for receiving items to be cleaned and a condensation dryer for externally loading a side wall of the washing compartment with outside air.

Dishwashers in general and program-controlled household dishwashers in particular are well known from the prior art per se, which is why there is no need for a separate documentary proof. It is therefore only exemplary on the DE 10 2013 101 861 A1 referenced, which relates to a generic dishwasher.

Dishwashers of the type in question have a washing container, which provides a washing compartment. This washing compartment is accessible on the user side via a charging opening which can be closed in a fluid-tight manner by means of a pivotally mounted flushing door. In the intended use case, the washing container serves to receive items to be cleaned, which in the case of a program-controlled household dishwasher, for example, can be crockery, cutlery pieces and / or the like.

For loading of items to be cleaned with rinse liquor, the dishwasher has a scavenging chamber side formed spray. This spraying device generally provides rotatably mounted spray arms, with typically two or three such spray arms being provided. In the intended use case, a loading of the items to be cleaned with rinse liquor by means of rotating spray arms. For the purpose of supplying the spray arms with rinsing liquor, a circulating pump is provided, to which the spray arms are fluidically connected.

For drying items to be washed after completion of a proper cleaning, dishwashers previously known from the prior art typically have a condensation dryer. This serves the outside admission of a Spülbehälterwand with outside air, resulting in a cooling of the Spülbehälterwand with the result that moist air located inside the Spülbehälters can condense on the inside cooled from the outside Spülbehälterwand. The moist air in the rinsing container is thus deprived of moisture, which leads to the drying of the dishes which are still hot at the end of an intended washing program.

For an external loading of a Spülbehälterwand prior art known from the prior art condensation dryer via an electrically operated fan. If the dishwasher has a heat pump device, the condensation dryer and the heat pump device may have a common fan, as with the DE 10 2013 101 861 A1 is described.

Dishwashers of the type described above have proven themselves in everyday practice. However, there is a constant drive to provide for improvements, especially with regard to energy consumption. It is therefore an object of the invention to further develop a dishwasher of the type mentioned in that a reduced energy consumption is possible in the intended use case. Furthermore, an improved handling of the dishwasher by the user is desired.

To achieve this object, a dishwasher of the aforementioned type is proposed with the invention is characterized in that the condensation dryer is formed fan-free and has an air supply duct, the air input side, providing a diffuser-shaped widening of the flow cross-section.

The condensation dryer of the dishwasher according to the invention is fan-free. It is therefore completely dispensed with the use of an electrically operated fan. This helps to save energy in the intended use case, because it requires no electrical energy for the operation of the condensation dryer according to the invention for lack of fan.

To blow-free a Spülraumwand with outside air, the condensation dryer has an air supply duct. This air supply channel provides On the input side, a diffuser-shaped extension of the flow cross-section ready. As a result, the free convection of the inflowing into the air duct outer air is promoted, creating an air flow due to the so-called chimney effect without the need for a blower.

The inventively provided diffuser-shaped extension of the flow cross-section ensures in the case of operation that there is no or only slight pressure losses during the intake of outside air. In that regard, outside air drawn in by free convection flows outside the washing compartment wall, which leads to cooling of the washing compartment wall with simultaneous heating of the air flowing past it. The heated air continues to increase, as a result, it comes to the formation of a negative pressure on the air inlet side. Outside air is thereby sucked, due to the inventive design without significant pressure loss. The so-sucked outside air is also heated, this cycle is maintained until it has come to cool the Spülbehälterwand on outside air temperature.

The achieved with the inventive design in an advantageous manner energy savings in the intended use case is due to the fact that has been dispensed with a fan for sucking fresh air. This fan-free design is possible because of the design of the air supply channel, as it allows the diffuser-shaped extension of the flow cross-section to suck in outside air without significant pressure loss, so that taking place on the Spülbehälterwand heating of the absorbed air is sufficient to nachzufördern cooler outdoor air to a sufficient extent.

Another advantage of the embodiment according to the invention is that the manufacturing costs and assembly costs are reduced due to the blower, which is not included in the prior art. In that regard, the embodiment of the invention provides a cost reduction. It is also advantageous that in the normal operation of the dishwasher, a noise reduction is achieved, which is due to the fact that eliminates the flow noise caused by a fan. It can be done so a quieter operation of the dishwasher, which requires improved handling for the user. Last but not least, the failure of the blower and the susceptibility of the Dishwasher reduced, which also contributes to a user-side simplification in handling.

According to a further feature of the invention, the dishwasher is characterized by a closure flap formed on the air inlet side of the air supply duct. The closure flap serves to selectively close or open the flow cross-section of the air supply channel. In the closed position of the closure flap, the air supply channel is closed on the air inlet side, that is to say an intrusion of outside air into the air supply channel is not possible. An entry of outside air into the air supply duct is only permitted when the shutter is open, that is to say when the shutter is in such a position that the flow cross-section of the air supply duct is at least partially released.

The design of a closure flap has the advantage of optionally taking the condensation dryer into use, that is to actively switch it. This makes it possible to prevent an air flow along the Spülbehälterwand then when cooling of the same is not desirable, for example, during a rinsing process taking place. An undesirable cooling during a rinsing process taking place can thus be prevented with the advantage of a avoided energy loss. An activation, that is to say start-up of the condensation dryer, takes place only when the closure flap is opened at a point in time at which drying is to be carried out in terms of process technology, for example after passing through a final-rinse operation. It is therefore preferred according to a further feature of the invention that the position of the flap is programmatically adjustable. The position of the flap is thus adjusted depending on the washing program carried out by the dishwasher. In this case, during all rinsing phases in which drying is not desired, the closure flap in its closed position, so that the condensation dryer is deactivated. Only then, when a process-technical drying is desired, the condensation dryer is activated by transferring the shutter from the closed position to the open position.

It is provided according to a further feature of the invention that the air supply duct on the air outlet side has a slot-shaped opening extending in the longitudinal direction of the air supply duct. In the operating case, so the outside air is sucked into the input side of the air supply duct and the output side via a in Delivered longitudinally extending opening of the air supply duct. This opening is slit-shaped, so that in an advantageous manner a two-dimensional loading of the associated Spülbehälterwand done, which causes an optimized cooling of the Spülbehälterwand. In this case, the extension of the slot-shaped opening is preferably optimized so that, with the lowest possible pressure loss of the outside air supplied via the air supply duct, the widest possible coverage of the rinsing vessel wall to be cooled takes place.

According to a further feature of the invention, it is provided that the flow cross-section of the air duct tapers in the longitudinal direction, starting from the air inlet-side extension. The flow space of the air duct thus has on the input side a diffuser-shaped extension, followed by a taper in the longitudinal direction. The formation of the taper affords the advantage that over the longitudinal extent of the slot-shaped dispensing opening substantially equal pressure conditions are applied, so that a uniform loading of the outlet-side opening and thus the associated Spülbehälterwand done with outside air.

According to a further feature of the invention, it is provided that the condensation dryer has a cooling channel which is fluidly connected to the air duct on the air outlet side. The cooling channel extends along a side wall of the washing container and the top wall of the washing container. In the intended use case, therefore, outside air is sucked in, which flows in via the air supply duct and due to the structural design of the air supply duct is conveyed to the cooling duct without significant pressure loss. As a result of a flow through the cooling channel, the side wall of the washing container is cooled. In the manner described above, the chimney effect is used, as a result, heated outside air rises in the cooling channel, flows out on the output side and as a result, a negative pressure is created in the air supply channel, so that more outside air is added.

The cooling channel opens according to a further feature of the invention, machine front side in an outlet opening. In the intended use case, the outside air passed through the cooling channel is discharged via this outlet opening. From there it enters the dishwasher surrounding atmosphere.

It is provided according to a further feature of the invention that the cooling channel provides a flow cross-section of constant size in the flow direction. This configuration ensures in an advantageous manner that no significant pressure losses occur in the outside air which is passed through the cooling channel.

According to a further feature of the invention it is provided that the cooling channel is connected substantially airtight to the air supply passage. By this measure, it is ensured in an advantageous manner that there is no mixing of the outside air flowing from the air supply channel into the cooling channel with ambient air. A uniform and basically pressure loss-free transfer of the suctioned outside air from the air supply passage in the cooling channel is so favored.

According to a further feature of the invention it is provided that the cooling channel is formed substantially fluid-tight to the ambient atmosphere. According to this feature, not only a substantially fluid-tight connection of the air supply channel to the cooling channel, but also a substantially fluid-tight configuration of the cooling channel takes place. Also by this measure a uniform and basically pressure-loss-free flow through the cooling channel is favored with outside air.

According to a further feature of the invention it is provided that the cooling channel is formed as an introduced into an insulation of the washing container embossing. The rinsing container is typically formed insulated for thermal protection reasons. Typically, an insulation is used for this purpose, which is attached to the outside of the washing. To form the cooling channel provided according to the invention, this already provided insulation of the washing container is equipped with an embossment, whereby the cooling channel according to the invention is formed. This embodiment is particularly easy to manufacture and moreover of cost advantage. In addition, the insulating material provides a sufficient fluid-tight design of the cooling channel. On the upper side, the cooling channel is limited by the outer housing or a cover plate of the dishwasher.

With the embodiment according to the invention a condensation dryer is proposed as a whole, which allows a fan-free design due to the above-described constructive features, so that in the intended use, a reduced energy consumption in an advantageous manner the result.

Figur 1

in schematischer Seitendarstellung eine erfindungsgemäße Geschirrspülmaschine;

Figur 2

in schematischer Perspektivansicht eine erfindungsgemäße Geschirrspülmaschine;

Figur 3

in schematischer Perspektivansicht einen nach der Erfindung vorgeschlagenen Kondensationstrockner im Detail;

Figur 4

in schematischer Perspektivansicht einen Luftzuführungskanal nach der Erfindung;

Figur 5

in schematischer Draufsicht den Luftzuführungskanal nach Figur 4;

Figur 6

in schematischer Seitenansicht den Luftzuführungskanal nach Figur 4;

Figur 7

in schematischer Rückansicht den Luftzuführungskanal nach Figur 4;

Figur 8

in schematischer Perspektivansicht einen Luftzuführkanal gemäß einer zweiten Ausführungsform mit einer Verschlussklappe in Offenstellung und

Figur 9

in schematischer Perspektivansicht einen Luftzuführkanal gemäß einer zweiten Ausführungsform mit einer Verschlussklappe in Verschlussstellung.

Further features and advantages of the invention will become apparent from the following description with reference to FIGS. Showing:

FIG. 1

a schematic side view of a dishwasher according to the invention;

FIG. 2

a schematic perspective view of a dishwasher according to the invention;

FIG. 3

in a schematic perspective view of a proposed invention condensation dryer in detail;

FIG. 4

in a schematic perspective view of an air supply duct according to the invention;

FIG. 5

in a schematic plan view the air supply duct after FIG. 4 ;

FIG. 6

in a schematic side view of the air supply duct FIG. 4 ;

FIG. 7

in a schematic rear view of the air supply duct FIG. 4 ;

FIG. 8

in a schematic perspective view of an air supply duct according to a second embodiment with a shutter in the open position and

FIG. 9

in a schematic perspective view of an air supply duct according to a second embodiment with a shutter in the closed position.

FIG. 1 can be seen in a purely schematic representation of a dishwasher in the design of a program-controlled household dishwasher.

The dishwasher 1 has, in a manner known per se, a housing 2 which terminates on the upper side by means of a cover plate 3. The housing 2 accommodates a washing container 5, which in turn provides a washing compartment 6. The washing compartment 6 serves to receive items to be cleaned.

For loading the washing compartment 6 with items to be cleaned has the washing compartment 5 via a charging opening 7. This is by means of a Spülraumtür 8 fluid-tight manner, the Spülraumtür 8 is rotatably mounted about a horizontally extending pivot axis.

When used as intended, the dishes to be cleaned are treated with rinsing liquor, for which purpose the dishwasher 1 has a spraying device not shown in detail in the figures.

As can be seen in particular from a synopsis of Figures 1 and 2 results, has the Spülraumtür 8 with respect to the plane of drawing after FIG. 2 on the upper side via an aperture 9. This provides in particular user-side operable control buttons. On the underside of the Spülraumtür 8 a base portion 13 is provided which provides an air inlet 14 for outdoor, that is room air 10.

The dishwasher 1 further has a condensation dryer 26. In the intended use case, this ensures that outside air 10 is sucked in via the air inlet 14. The aspirated outside air 10 is initially passed outside the side wall 15 and then outside the ceiling wall 16 of the washing container 5 as the air flow 11. The air flow 11 passes after passing through the side wall 15 in a gap 4 below the cover plate 3, from where it is discharged as exhaust air 12 to the surrounding the dishwasher 1 atmosphere again.

When used as intended, rinsing takes place at the end of a cleaning program. The rinsing liquor and thus also the rinse container 5 recorded items to be warmed up to, for example, 55 degrees Celsius. By adding a rinse aid, the surface tension of the wash liquor is reduced. At the end of rinsing, the rinsing solution is pumped out. In a dripping phase residual moisture from the items to be washed and the baskets located in the washing container for recording Drain or drain of items, which is favored by the low surface tension. The heat generated by the items to be washed evaporates the still remaining film of water. The Spülraumluft consequently saturates gradually with water vapor. If the Spülraumluft is saturated, no more water from the dishes and baskets dry. In order to reduce the humidity in the Spülraumluft and thus to make receptive again, the Spülbehälterwand 15 of the washing container 5 is cooled in the manner already described above. The temperature of the Spülraumwand 15 drops as a result, which leads to a drop below the dew point of the moist Spülraumluft. The water vapor in the saturated Spülraumluft can condense on the Spülraumwand 15. The Spülraumluft is no longer saturated and can thus absorb moisture again.

The above-described air duct is provided by the condensation dryer 26 provided according to the invention, which is designed according to the invention without blower.

The structural design of the condensation dryer 26 results in particular from the illustration FIG. 3 , As can be seen, the condensation dryer 26 has an air supply channel 17. This is preferably a plastic component which serves for air supply.

The air supply channel 17 has on the input side via a connection 18, with which the air supply channel is connected to the air inlet 14 formed in the base region 13 of the dishwasher 1. The air supply channel 17 provides the air inlet side a diffuser-shaped extension 19 of the flow cross section ready. Because of this extension 19 it is ensured that inflowing outside air 10 is slowed down in its inflow velocity, so that pressure losses in the sucked-in outside air are largely prevented. In the direction of flow, a channel section 25 connects to the diffuser-shaped extension 19, the flow cross-section of which is tapered starting from the air inlet-side extension 19 in the longitudinal direction 24. With reference to the drawing plane FIG. 3 this channel section 25 carries on the upper side a slot-shaped opening 20 which extends in the longitudinal direction 24 and via which, in the event of operation, the aspirated outlet air 10 is delivered as air flow 11.

At the air supply passage 17 fluidly connects a cooling channel 21.

This is the air inlet connected to the opening 20 of the air supply channel 17, so that in the case of operation via the air supply channel 17 sucked outside air 10 is passed as air flow 11 in the cooling channel 21.

As in particular the representation after FIG. 3 can be seen, the cooling channel 21 extends on the outside via a side wall 15 and the top wall 16 of the Spülbehälters 5. Here, the cooling channel 21 is introduced as an embossing in a washing container 5 covering insulation 22 or the insulation 22 is shaped so that between washing 5 and insulation 22 of the cooling channel 21 is formed. On the upper side, the cooling channel 21 is closed by the housing 2 or the cover plate 3. In this case, the insulation 22 in particular has a shape or embossing, through which the further top-side profile of the cooling channel 21 is formed between the washing container 5 and the insulation 22.

The cooling channel 21 opens on the output side into an outlet opening 23 which is arranged, in particular, on the front side between the cover plate 3 and the rinsing container 5, and via which the airflow 11 passed through the cooling channel 21 is discharged as exhaust air 12.

The operation of the condensation dryer 26 is the following: About the air duct 17 outside air 10 is sucked and transferred into the cooling channel 21. This happens due to the structural design of the air duct 17 basically free of pressure loss. On the warm side wall 15 of the washing compartment 5, the air flow 11 is heated, which leads to a cooling of the side wall 15. The heated air flow 11 increases due to thermal reasons (chimney effect) in the cooling channel 21, whereby a negative pressure on the air inlet side, resulting in a steady sucking in of outside air 10. The heated and ascended in the cooling channel 21 air flow 11 is discharged as heated exhaust air 12 via the outlet opening 23.

• Die Breite der Öffnung 20 (Maß x1) ist so gestaltet, dass der gesamte Spaltraum zwischen der Seitenwand 15 des Spülbehälters 5 und der zugehörigen Außenwand des Gehäuses 2 ausgefüllt ist. Ungewünschte Verwirbelungen mit der die Geschirrspülmaschine umgebenden Raumluft sind so vermieden. Die Breite der Öffnung 20 sollte im Übrigen 10 Millimeter nicht unterschreiten.
• Die Länge der Öffnung 20 (Maß x2) ist bevorzugter Weise so gestaltet, dass möglichst die gesamte Tiefe der Seitenwand 15 des Spülbehälters 5 abgedeckt ist. Sollte dies aufgrund von Bauraumbegrenzungen nicht möglich sein, ist die Länge der Öffnung 20 so groß wie möglich zu wählen, sie sollte in jedem Fall aber mindestens 50 Prozent der Tiefe der Geschirrspülmaschine 1 entsprechen.
• Der Radius des Kanalabschnitts 25 am hinteren Ende (Maß r1) ist so gewählt, dass er der Breite der Öffnung 20 (Maß x1) entspricht. Je nach Einbaubedingungen kann dies gegebenenfalls auch variieren, wobei der Radius r1 im Bereich von 0,5 * x1 bis 4 * x1 liegen sollte. Die zugehörige Querschnittsfläche liegt deshalb in diesem Bereich zwischen 0,5 *π* x1² ≤ Querschnittsfläche ≤ 4 * π * x1².
• Der Kanalabschnitt 25 erweitert sich ausgehend von der hinteren Querschnittsfläche bis zum strömungstechnischen Anfang der Öffnung 20 auf sein Maximum. Der Radius an dieser Stelle beträgt r2 und ist bevorzugter Weise so gewählt, dass er 2,5 * x1 entspricht. Hierdurch ergibt sich für den Winkel w2 ein Winkelmaß von circa 15 Grad. Dieser Öffnungswinkel sollte je nach Einbaubedingungen im Bereich zwischen 10 Grad und 20 Grad liegen.
• Der Öffnungswinkel w1 sollte ein Winkelmaß von 30 Grad nicht unterschreiten.

The air supply passage 17 is in detail in the FIGS. 4 to 7 shown in different views. For a low pressure loss, the design of the air supply channel 17 is of particular importance. The following design features ensure this:

• The width of the opening 20 (dimension x1) is designed so that the entire gap space between the side wall 15 of the washing compartment 5 and the associated outer wall of the housing 2 is filled. Unwanted turbulence with the ambient air surrounding the dishwasher are thus avoided. Incidentally, the width of the opening 20 should not be less than 10 millimeters.
• The length of the opening 20 (dimension x2) is preferably designed so that as far as possible the entire depth of the side wall 15 of the washing compartment 5 is covered. If this is not possible due to space limitations, the length of the opening 20 should be as large as possible to choose, but it should in any case at least 50 percent of the depth of the dishwasher 1 correspond.
• The radius of the channel portion 25 at the rear end (dimension r1) is chosen so that it corresponds to the width of the opening 20 (dimension x1). Depending on the installation conditions, this may also vary, where the radius r1 should be in the range of 0.5 * x1 to 4 * x1. Therefore, the associated cross-sectional area is in this range between 0.5 * π * x1 ≤ ² cross-sectional area ≤ 4 * π * x1. ²
• The channel portion 25 extends from the rear cross-sectional area to the fluidic beginning of the opening 20 to its maximum. The radius at this point is r2 and is preferably chosen to be 2.5 * x1. This results in an angle of approximately 15 degrees for the angle w2. Depending on the installation conditions, this opening angle should be between 10 degrees and 20 degrees.
• The opening angle w1 should not fall below an angle of 30 degrees.

In addition to the air flow through the air supply passage 17, it is important that the sucked outside air cools only the wash chamber wall 15 and not other components of the dishwasher 1. In addition, a mixing of the air warmed up by the wash chamber wall 15 with the ambient air surrounding the dishwasher 1 is to be avoided. which is in particular between the washing compartment 5 and housing 2. To achieve this, the introduced by embossing in the insulation 22 cooling channel 21 is formed so that a separation of the cooling channel 21 is ensured to the gap between the rinsing 5 and housing 2. It may be provided in this context, additional Dämmdichtstreifen that for a in the Substantially fluid-tight connection of the air duct 14 to the cooling channel 21 care.

Overall, the air guide is designed such that a connection to the room air only takes place on the air inlet side of the air supply duct 17 and on the air discharge side of the cooling duct 21 via the outlet opening 23. As a result, the air heated by the waste heat from the washing compartment 4 rises and flows above the washing compartment 5 via the outlet opening 23. Due to the resulting negative pressure, cooler room air is sucked in, which heats up again, creating a chimney effect.

The FIGS. 8 and 9 show an alternative and preferred embodiment of the air supply duct 17. According to this embodiment, a shutter 27 is provided on the air inlet side of the air supply duct 17. In the illustrated embodiment, the closure flap is rotatably disposed within the nozzle 18. An adjustment of the closure flap 27 takes place via an actuating drive 28 formed on the outside of the air feed channel 17. The actuating drive 28 preferably has an electric motor (not further illustrated in the figures) which is connected to the process control of the dishwasher 1. This allows program-dependent control of the closure flap 27 by the dishwasher-side control device.

FIG. 8 shows the flap 27 in the open position. In this position, the flow cross-section of the air supply channel 17 is released. In contrast to this shows FIG. 9 the closure flap 27 in the closed position, in which position the flow cross-section of the air feed channel 17 is closed.

If the flap in the open position according to FIG. 8 is located, an inflow of outside air is allowed in the air supply passage 17. In this position, the closure flap 17 can be carried out by means of the condensation dryer 26 a proper drying. The condensation dryer 26 is therefore akitiviert in the open position of the flap 27.

Once the flap 27 from its open position to FIG. 8 in their closed position FIG. 9 is transferred, the flow cross-section of the air supply channel 17 is closed. Outside air can in this position of the flap 27 do not flow into the air supply channel 27, resulting in a deactivation of the condensation dryer 26.

reference numeral

1. 1 dishwasher
2. 2 housings
3. 3 cover plate
4. 4 gap space
5. 5 rinse tanks
6. 6 washing room
7. 7 feed opening
8. 8 washroom door
9. 9 aperture
10. 10 outside air
11. 11 airflow
12. 12 exhaust air
13. 13 base area
14. 14 air intake
15. 15 side wall
16. 16 ceiling wall
17. 17 air duct
18. 18 nozzles
19. 19 extension
20. 20 opening
21. 21 cooling channel
22. 22 insulation
23. 23 outlet opening
24. 24 longitudinal direction
25. 25 channel section
26. 26 condensation dryers
27. 27 closing flap
28. 28 actuator

Claims (13)

Dishwasher, in particular program-controlled household dishwasher, providing end with a washing chamber (4) washing container (5) for receiving items to be cleaned and a condensation dryer (26) for outside exposure of a side wall (15) of the washing container (5) with outside air (10), characterized characterized in that the condensation dryer (26) is formed fan-free and has an air supply channel (17), the air inlet side provides a diffuser-shaped extension (19) of the flow cross-section. Dishwasher according to claim 1, characterized by a closure flap (27) provided on the air inlet side of the air duct (17). Dishwasher according to claim 2, characterized in that the closure flap (27) from a flow cross section of the air duct (17) closing the closing position in a flow cross section of the air duct (17) releasing open position and vice versa is pivotable. Dishwasher according to claim 2 or 3, characterized in that the position of the closure flap (27) is programmably adjustable. Dishwasher according to one of the preceding claims, characterized in that the air duct (17) on the air outlet side in the longitudinal direction (24) of the air duct (17) extending, slot-shaped opening (20). Dishwasher according to one of the preceding claims, characterized in that the flow cross-section of the air duct (17), starting from the air inlet-side extension (19) tapers in the longitudinal direction (24). Dishwasher according to one of the preceding claims, characterized in that the condensation dryer (26) has an air outlet side Having the air duct (17) fluidly connected cooling channel (21). Dishwasher according to claim 7, characterized in that extending the cooling channel (21) along a side wall (15) and a top wall (16) of the washing compartment (5). Dishwasher according to claim 7 or 8, characterized in that the cooling channel (21) on the machine front side in an outlet opening (23) opens. Dishwasher according to claim 7, 8 or 9, characterized in that the cooling channel (21) provides a flow cross-section of constant size in the flow direction. Dishwasher according to one of the preceding claims 7 to 10, characterized in that the cooling channel (21) is connected substantially airtight to the air supply duct (17). Dishwasher according to one of the preceding claims 7 to 11, characterized in that the cooling channel (21) is formed substantially airtight to the ambient atmosphere. Dishwasher according to one of the preceding claims 7 to 12, characterized in that the cooling channel (21) is designed as a in an insulation (22) of the washing compartment (5) introduced embossing.

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