EP3718459B1 - Dishwasher, in particular a domestic dishwashing machine - Google Patents

Description

The invention relates to a dishwasher, in particular one

Domestic dishwasher, with a heat pump device, which has an evaporator arranged in an air duct, the air duct having an air inlet opening and an air outlet opening.

A dishwasher of the generic type is from EP 3 427 628 A1 or the CN 105 476 584 A known.

The ones from the EP 3 427 628 A1 known dishwasher has a washing container that provides a washing area. This is accessible to the user via a loading opening which can be closed in a fluid-tight manner by means of a pivotably mounted washing compartment door. When used as intended, the washing compartment serves to accommodate items to be cleaned, which can be crockery, cutlery and/or the like, for example.

A spray device housed in the washing compartment is used to apply washing liquid to items to be cleaned. This spray device typically provides rotatably mounted spray arms, with two or three such spray arms being provided as a rule. In the case of intended use, the items to be cleaned are subjected to washing liquor by means of rotating spray arms

The previously known dishwasher also has a heat pump device which serves to reduce the energy consumption, in particular when heating up the washing liquor.

In the heat pump device of the dishwasher after EP 3 427 628 A1 It is a so-called air-water heat pump device. When used as intended, thermal energy is extracted from the ambient air with such a heat pump device. the EP 3 427 628 A1 provides an air duct for this purpose, within which an evaporator of the heat pump device is arranged. Furthermore, a fan wheel is arranged in the air duct, which, when used as intended, draws in ambient air which is guided through the evaporator arranged in the air duct. The air duct has an air inlet opening at the front and an air outlet opening at the rear, so that ambient air sucked in at the front of the dishwasher can be routed back into the atmosphere surrounding the dishwasher after passing through the evaporator at the rear of the dishwasher.

In normal operation, the air sucked in from the environment and guided through the air duct cools down as a result of heat energy extraction. It is therefore after the EP 3 427 628 A1 also provided to provide the air outlet opening of the air duct on the back of the dishwasher, so that an unwanted entry of cooled air is avoided in an area directly in front of the loading opening of the dishwasher.

the EP 2682036 A2 also discloses a dishwashing machine with an air-to-water heat pump device. This has an air inlet opening on the front and air outlet openings on the side.

the US9468355B2 shows a dishwasher with an air-water heat pump device. This has an air switching device with which the air sucked in at the front in the base area and guided through the evaporator can be routed out of the dishwasher either through a side air outlet or along the washing container wall and at the front above the dishwasher door.

Although the construction after the EP 3 427 628 A1 has basically proven itself in everyday practical use, there is a need for improvement. In particular, efforts are being made to minimize the assembly work involved in setting up a dishwasher at the installation site. It is therefore the object of the invention to further develop a dishwasher of the type mentioned at the outset in such a way that simplified assembly at the installation site of the dishwasher is made possible.

To solve this problem, a dishwasher of the type mentioned is proposed with the invention, which is characterized in that the Air inlet opening and the air outlet opening are formed on the front of the dishwasher and that the air duct has a first and a second duct section, the first duct section having the air inlet opening and the second duct section having the air outlet opening.

In a departure from the prior art, the air outlet opening is not formed on the back of the dishwasher. Rather, it is provided that both the air inlet opening and the air outlet opening are formed on the front of the dishwasher. When used as intended, ambient air is sucked in at the front and, after flowing through the air duct, is also discharged at the front of the dishwasher via the air outlet opening provided for this purpose back into the atmosphere surrounding the dishwasher.

The air duct has two duct sections, namely a first duct section on the one hand and a second duct section on the other. The first duct section has the air inlet opening. In the case of intended use, air is therefore introduced into the first duct section via the air inlet opening. After the air has been transferred from the first duct section to the second duct section, the air cooled down in the evaporator can then be discharged through the air outlet opening, with the cooled air being discharged on the front side of the device because the air outlet opening is formed on the front.

The discharge of the cooled air to the rear of the dishwasher, which is known from the prior art, has proven to be disadvantageous in that it requires special seals to neighboring appliances or furniture in a kitchen unit and/or to the rear wall of the dishwasher, which makes assembly more difficult, especially since the sealing measures to be taken depend on the respective installation site.

The configuration according to the invention provides a remedy here, since both the air inlet and the air outlet are on the front of the device, so that to set up the device only a corresponding cutout in the skirting board, for example the kitchen unit, needs to be made. Additional sealing measures for the room wall and/or for adjacent furniture and/or for equipment are not required. Preferably, the air duct protrudes beyond a front side of the baseboard and is in particular through a section of the baseboard, the air inlet opening filling a first area and the air outlet opening filling a second section of the baseboard.

Another advantage of the configuration according to the invention is that there is a double flow through the evaporator, namely a first flow when passing the first channel section and a second flow when passing the second channel section. The drawn-in air therefore flows through the air inlet opening into the first channel section and flows through the evaporator for the first time. On the way back in the direction of the air outlet opening, the air flows through the second channel section and passes through the evaporator a second time. This separation of the evaporator into two flow directions increases the flow velocity through the evaporator while the volume flow and dimensions of the evaporator remain the same. This brings about better heat transfer from the air to the working fluid or refrigerant of the evaporator, which increases the efficiency of the heat pump device. In order to increase efficiency, the distance between the fins of the evaporator, which is preferably designed as a finned heat exchanger, can be increased. This in turn permits a more cost-effective design of the evaporator and enables better drainage of condensate that may occur on the fins by dripping.

The front discharge of the air cooled in the evaporator has the disadvantage that a certain short-circuit current can occur with regard to the room air to be sucked in, but this disadvantage is consciously accepted because the advantages achieved with the invention outweigh the disadvantages. In addition--as will be explained below--by optimizing the air duct, the duct sections and/or other measures, an undesired short-circuit current can be reduced to a minimum, as can the associated negative effect. As a result, a constructive configuration is created that permits optimized operation of the heat pump device, and this at the same time as there is the possibility of simplified assembly. In addition, in contrast to the prior art, an increase in efficiency can be achieved.

According to a further feature of the invention, the evaporator is arranged with a first evaporator section in the first duct section and with a second evaporator section in the second duct section. It is therefore a fluidic dichotomy of the evaporator is provided, wherein in the intended use case a first section of the evaporator is in operative connection with the air guided through the first duct section. The second evaporator section instead interacts with the air passed through the second duct section.

As an alternative to this embodiment, provision can also be made to arrange two evaporators in the air duct, one evaporator being arranged in the first duct section and a second evaporator being arranged in the second duct section.

According to a further feature of the invention, it is provided that the second duct section is fluidically connected to the first duct section, with the first duct section preferably serving the first evaporator section or the first evaporator as an inlet air duct and the second duct section serving the second evaporator section or the second evaporator as an exhaust air duct.

The air duct is therefore designed in two parts in the manner already described above, with one part serving as a supply air duct and the other part serving as an exhaust air duct. The ambient air drawn in flows in via the supply air duct. This passes through the first evaporator section. A deflection then takes place and the air is conveyed through the exhaust air duct back to the outlet opening. The air then passes through the second evaporator section. As a result, the overall efficiency of the heat pump device is increased in the manner already described.

According to a further feature of an embodiment of the invention, it is provided that the air inlet opening and the air outlet opening are fluidically separated from one another. The two duct sections are also preferably separated from one another in terms of flow, so that undesired mixing of supply air and exhaust air is avoided. The fluidic separation can be designed to run vertically or horizontally. With a vertical separation, the air inlet opening and the air outlet opening lie side by side in the horizontal direction. In this case, it is preferable to use the entire width of the dishwasher to form the openings.

The vertical separation of the flow directions of an evaporator designed as a finned heat exchanger can also be achieved by a vertically aligned fins Follow the lamella yourself. This construction proves to be particularly simple in construction. Alternatively, a separation can be implemented using a separate plate, so that the slats can be aligned both vertically and horizontally.

In the case of a horizontal separation of the air duct, the air inlet opening and the air outlet opening are arranged one above the other in the height direction, it being preferable for the air inlet opening to be positioned above the air outlet opening. This has the advantage that, due to the higher density of the cooler exhaust air, there is less mixing of incoming and outgoing air.

In the case of a horizontal separation of the air duct, the evaporator is preferably tilted and/or the separating plane within the evaporator is aligned inclined to the horizontal, so that any condensate that may occur can flow off. The flow can also be separated when the lamellae are aligned horizontally by a lamella itself or by a separate plate. In the case of a separate plate, the fins of the heat exchanger can be oriented both vertically and horizontally.

The greatest possible avoidance of an unwanted air short-circuit flow is given in the construction according to the invention by the momentum of the outflowing air. The exact guidance of the air through the air duct results in a strongly directed air jet with regard to an exhaust air flow, which flows far into the installation space of the dishwasher before it is dispersed. On the other hand, since air is sucked in diffusely from all spatial directions via the inlet opening, the short-circuit air flow between the outflowing and inflowing air is low.

A short-circuit current can also be further reduced by the fact that the opening areas of the air inlet opening and the air outlet opening are of different sizes. And so, according to a further feature of the invention, it is preferred that the opening area provided by the air inlet opening is larger than the opening area provided by the air outlet opening, in particular by a factor of between 1 and 3, preferably by a factor of between 1.2 and 2 than the opening area provided by the air outlet port. This causes the flow speed of the air discharged via the outlet port to be increased, thus increasing the momentum. This is accompanied by a drop in the flow rate air flowing in via the intake opening.

Provision can also be made for the exhaust air to be discharged at an angle to the horizontal of, for example, between 0° and 20°, more preferably between 0° and 10°, for example by a plate separating the two duct sections being positioned on the opening side corresponding to the horizontally inclined. A possible flow short circuit can thus be reduced even further.

The cooling or working medium of the heat pump device undergoes a phase change in the evaporator. It enters the evaporator as wet steam, evaporates there and is then overheated. During superheating, the temperature of the refrigerant increases, reducing the temperature difference between the air as the energy source and the refrigerant. However, the heat flow is strongly dependent on the temperature difference between the two media, which means that this decreases as the temperature difference decreases. By dividing the heat exchanger into two flow directions, the refrigerant can be routed in a targeted manner. The sucked-in air is initially cooled slightly when it first passes through the heat exchanger, and when it passes through it again in the outlet direction, it is then further cooled. Since the air in the intake area is therefore warmer than in the outlet area, the refrigerant can be overheated in the flow area of the intake air. This arrangement corresponds to a counterflow heat exchanger, which can transfer a larger amount of energy than a cocurrent heat exchanger. In this respect, too, the configuration according to the invention proves to be advantageous.

During the intended use of the heat pump device, waste heat from the base area of the dishwasher, especially waste heat from the compressor, is lost to the environment. This waste heat can be used by mixing it with the air drawn in from the environment. In addition, provision can be made for supplying warm base air to the exhaust air flow, which improves the comfort of a user standing in front of the dishwasher. In order to make this possible, it is provided according to one embodiment of the invention that the first and/or the second channel section is fluidically connected to the atmosphere surrounding the channel section by means of an inflow opening that can be closed in a fluid-tight manner. The inflow opening is in an area of a base of the dishwasher arranged below the rinsing tank.

As a further feature of an embodiment of the invention, a fan wheel arranged in the air duct, preferably having a radial fan, is provided, which is fluidically connected downstream of the first evaporator section or the first evaporator in the direction of flow and upstream of the second evaporator section or the second evaporator in the direction of flow. It is provided that in the direction of flow between the first evaporator section or first evaporator and the fan wheel there is a fluid-tightly closable passage opening which fluidly connects the first duct section to the second duct section. This makes it possible to reverse the flow of return air that is otherwise routed through the air duct, with the result that a full-surface flow through the heat exchanger can be achieved. This allows the air fed through the air duct to be used for active condensation drying. A second channel which is fluidically connected to the air channel is therefore also preferably provided, which allows air to act on a washing container wall when it is loaded.

According to this preferred embodiment, it is possible to switch back and forth between a reverse flow application and a full-surface flow through the heat exchanger. In this case, with a full-surface flow through the heat exchanger, any residual moisture present in the heat exchanger can dry better, for example due to the formation of condensate. For this purpose, the fan running time can be extended beyond active condensation drying if necessary, so that the heat exchanger is completely dried.

As an alternative to full-surface flow through the heat exchanger, it can also be provided that a first part, in particular at least 60%, of the sucked-in air, preferably a volume flow of at least 30m ³ /h, in particular between 35m ³ /h and 55m ³ /h, can be used for condensation drying is used and that a preferably smaller, second part of the drawn-in air is recirculated through a bypass through the heat exchanger, so that evaporator drying is achieved and this with simultaneous fan support of active condensation drying. The result of the configuration according to the invention is in particular that through the divided air flow through the evaporator through a space-optimized heat pump device is given. In this case, the installation during the manufacture of the dishwasher is simplified by the one-sided air inlet and outlet. No further air ducts or seals are necessary within a kitchen unit, which makes assembly on site less complex. Because all you have to do is create a cutout in the skirting board of the kitchen unit and shorten the air duct to match the individual base recess.

Fig. 1

in einem schematischen Seitenschnitt eine erfindungsgemäße Geschirrspülmaschine gemäß einer ersten Ausführungsform;

Fig. 2

in einer schematischen Draufsicht von oben einen erfindungsgemäßen Luftkanal gemäß einer zweiten Ausführungsform und einer ersten Klappenstellung;

Fig. 3

in einer schematischen Draufsicht von oben den Luftkanal nach Fig.2 gemäß einer zweiten Klappenstellung;

Fig. 4

den Luftkanal nach Fig. 2 gemäß einer Ausführungsalternative;

Fig. 5

in geschnittener Seitenansicht den erfindungsgemäßen Luftkanal gemäß einer weiteren Ausführungsform;

Fig. 6

in geschnittener Seitenansicht den erfindungsgemäßen Luftkanal gemäß einer weiteren Ausführungsform;

Fig. 7

in geschnittener Seitenansicht den erfindungsgemäßen Luftkanal gemäß einer weiteren Ausführungsform;

Fig. 8

in schematischer Draufsicht von oben eine weitere Ausführungsform des erfindungsgemäßen Luftkanals.

Further features and advantages of the invention result from the following description based on the figures. show:

1

in a schematic side section, a dishwasher according to the invention according to a first embodiment;

2

in a schematic plan view from above an air duct according to the invention according to a second embodiment and a first flap position;

3

the air duct in a schematic plan view from above Fig.2 according to a second flap position;

4

the air duct 2 according to an embodiment alternative;

figure 5

in a sectional side view the air duct according to the invention according to a further embodiment;

6

in a sectional side view the air duct according to the invention according to a further embodiment;

Figure 7

in a sectional side view the air duct according to the invention according to a further embodiment;

8

in a schematic plan view from above a further embodiment of the air duct according to the invention.

1 shows a dishwasher 1 according to the invention in a purely schematic side sectional view.

The dishwasher 1 is part of a kitchen unit that is arranged on a room wall 6 . A worktop 8 is provided above the dishwasher 1 .

The dishwasher 1 has a housing 2 which, among other things, accommodates a washing container 3 . The rinsing compartment 3 in turn provides a rinsing chamber 4 which, when used as intended, serves to accommodate items to be washed 7 to be cleaned.

For the user to load the washing compartment 4 with items to be washed 7 , the washing compartment 3 has a loading opening, not shown in detail in the figures, which can be closed in a fluid-tight manner by means of a washing compartment door 5 .

The dishwasher 1 also has a heat pump device 10. In a manner known per se, this has a compressor, a condenser, an expansion element in the form of a throttle, an evaporator 11 and a flow circuit which fluidically connects these structural components with one another, in which a refrigerant, the means a working medium is guided. For the sake of a better overview, only the evaporator 11 of the heat pump device 10 is shown in the drawings.

The heat pump device 10 is a so-called air-water heat pump device. When used as intended, this extracts thermal energy from the ambient air, which is transferred to the working medium of the heat pump device 10 circulated in the flow circuit. This happens in the evaporator 11.

The evaporator 11 is arranged in an air duct 15 . This is according to the embodiment 1 divided horizontally by means of a separating plate 26, whereby a first channel section 16 and a second channel section 17 are provided. When used as intended, ambient air enters the first duct section 16 via an air inlet opening 18 and is then discharged in accordance with the figure 1 Drawn arrows circulated and passes through the second channel section 17 to an air outlet opening 19 through which a return of the sucked air into the environment takes place. For the purpose of air intake, a fan wheel 21 arranged in the air duct 15 is provided, which can be designed as a radial fan wheel or as an axial fan wheel.

According to the invention, both the air inlet opening 18 and the air outlet opening 19 are formed on the front of the dishwasher 1 . The first duct section 16 has the air inlet opening 18 and the second duct section 17 has the air outlet opening 19 .

The evaporator 11 is arranged inside the air duct 15 . By dividing the air duct 15 into two duct sections 16 and 17, the evaporator 11 is also fluidically divided, so that a first evaporator section 22 located in the first duct section 16 and a second evaporator section 23 located in the second duct section 17 are provided. When used as intended, the sucked-in air flows through the evaporator 11 twice, namely a first time in the first duct section 16 in the direction of the fan wheel 21 and a second time in the second duct section 17 in the direction of the outlet opening 19.

In the illustrated embodiment, the kitchenette is equipped with a baseboard 12. For the purpose of access to the air duct 15, a passage 13 is introduced into this, through which the air duct 15 protrudes at the end. A panel 14 is provided for fixing the position of the air duct 15 relative to the baseboard 12 and for covering the gap between the air duct 15 and baseboard 12 in a visually appealing manner.

The split air routing through the evaporator 11 results in a space-optimized design of the heat pump device 10. In addition, this achieves an increase in efficiency. This is because separating the evaporator 11 into two flow directions increases the flow rate through the evaporator 11 while the volume flow and dimensions of the evaporator 11 remain the same. This results in improved heat transfer from the air to the working medium, which increases the efficiency of the heat pump device 10.

The configuration according to the invention also results in simplified assembly at the installation site, since only the passage 13 needs to be formed in the skirting board 12 for the intended integration of the dishwasher 1 in the kitchen unit. Additional air ducts and/or seals in relation to other devices and/or furniture in the kitchenette are not required.

2 shows a second embodiment, in a schematic plan view from above. In contrast to the design 1 the air duct 15 is not divided horizontally but vertically into the two duct sections 16 and 17 . But also according to this embodiment, a flow-related part of the evaporator 11 is provided in the first evaporator section 22 and the second evaporator section 23, which results in the flow division in the evaporator 11 already explained above.

According to the embodiment after 2 a second channel 29 is fluidically connected to the air channel 15 . The fluidic transition from the air duct 15 to the second duct 29 can be selectively closed or opened by a pivotable actuator in the form of a flap 30 . 2 shows the closed position.

Another actuator in the form of a pivotable flap 28 is provided between the evaporator 11 and the fan wheel 21 , which is used to selectively close a passage opening 27 . When the passage opening 27 is open, there is a fluidic short circuit of the two channel sections 16 and 17, as is shown in the illustration 3 reveals.

The different positions of the flaps 28 and 30 allow the following procedure to be carried out.

According to 2 the flaps 28 and 30 are each in their closed position. This position is selected when the heat pump device 10 is operated as intended. The ambient air flows as supply air flow 24 via the air inlet opening 18 into the air duct 15 . It then passes through the first evaporator section 22 in the first duct section 16 . On its way back, the air flows through the second evaporator section 23 arranged in the second duct section 17 before it is then released again into the environment via the air outlet opening 19 as an exhaust air flow 25 .

When the flap 28 is open, the first channel section 16 and the second channel section 17 are short-circuited, like this one 3 indicates. Ambient air is then sucked in both via the first channel section 16 and via the second channel section 17 . As a result, there is a flow through the evaporator 11 over the entire surface.

With the flap 30 open, the air sucked in via the two duct sections 16 and 17 can then be guided into the second duct 29 which is fluidically connected to the air duct 15 . The air flow guided into the second channel 29 is used to apply pressure to the outside of the washing compartment 3 for the purpose of condensation drying of items to be washed in the washing compartment 3 .

According to the 3 Variant shown, which does not fall under the wording of the claims, the flap 30 is fully converted into its second position of use, so that only a supply air flow 24 is promoted via the second channel section 17. An alternative position of the flap 30 is in 8 shown. According to this position, air can be returned via the second channel section. The passage opening 27 between the two channel sections 16 and 17 is closed when the flap 30 is in such a position. As a result of this flap position, the aspirated air is partly conveyed into the second channel 29 and partly discharged back in counterflow through the evaporator 11 at the front. The division into these two partial flows is determined by the position of flap 30.

4 leaves one to the embodiment 3 recognize slightly modified embodiment. According to this modified embodiment, the separating plate 26 is oriented at a slight angle to the horizontal in the area of the two openings 18 and 19 . This results in a fluidic separation of supply air flow 24 and exhaust air flow 25, which helps to reduce a short-circuit air flow.

figure 5 shows a further embodiment of a horizontal separation of the air duct 15. According to this embodiment, it is provided that the evaporator 11 is inclined to the horizontal, so that any condensate occurring in the evaporator 11 can flow away under the force of gravity. This results in faster drying of the evaporator 11. Another embodiment is in 6 shown. After that is an inflow opening 31 provided, through which warm base air can flow into the second channel section 17 if necessary. This has the advantage that the air that is guided through the evaporator 11 and is thereby cooled is warmed up with base air supplied from the outside, whereby the exhaust air flow 25 is brought to a higher temperature level. This serves to improve the comfort of a user of the dishwasher 1 who is in front of the dishwasher 1 .

According to the embodiment after 7 an inflow opening 32 can also be provided with respect to the first channel section 16 . This serves to enrich the supply air flow 24 with heated base air. As a result, the heat transfer in the evaporator from the air to the working medium can be additionally increased.

Reference sign

1

dishwasher

2

Housing

3

flush tank

4

dishwashing room

5

scullery door

6

room wall

7

dishes

8th

countertop

9

base

10

heat pump device

11

Evaporator

12

skirting board

13

passage

14

cover

15

air duct

16

first canal section

17

second canal section

18

air intake opening

19

air outlet opening

20

height direction

21

fan wheel

22

first evaporator section

23

second evaporator section

24

supply airflow

25

exhaust flow

26

divider

27

passage opening

28

flap

29

secondary channel

30

flap

31

inflow opening

32

inflow opening

Claims (12)

1. Dishwasher, in particular domestic dishwasher, comprising a heat pump device (10) which has an evaporator (11) arranged in an air duct (15), the air duct (15) having an air inlet opening (18) and an air outlet opening (19),

   the air inlet opening (18) and the air outlet opening (19) being formed on the front of the dishwasher (1), and the air duct (15) having a first and a second duct portion (16, 17), the first duct portion (16) having the air inlet opening (18) and the second duct portion (17) having the air outlet opening (19),

   characterised in that

   the evaporator (11) is arranged so as to have a first evaporator portion (22) in the first duct portion (16) and a second evaporator portion (23) in the second duct portion (17),
   or

   in that a first evaporator is arranged in the first duct portion (16) and in that a second evaporator is provided which is arranged in the second duct portion (17),

   such that air drawn in via the air inlet opening (18) flows through the first evaporator portion (22) or the first evaporator when passing through the first duct portion (16), is then deflected and enters the second duct portion (17) and flows through the second evaporator portion (23) or the second evaporator when passing through the second duct portion (17).
2. Dishwasher according to claim 1, characterised in that the evaporator (11) is a flat tube heat exchanger.
3. Dishwasher according to either of the preceding claims, characterised in that the first duct portion (16) serves as a supply air duct for the first evaporator portion (22) or the first evaporator, and the second duct portion (17) serves as an exhaust air duct for the second evaporator portion (23) or the second evaporator.
4. Dishwasher according to any of the preceding claims, characterised in that the air inlet opening (18) and the air outlet opening (19) are fluidically separated from one another.
5. Dishwasher according to claim 4, characterised in that the separation is oriented vertically or horizontally.
6. Dishwasher according to any of the preceding claims, characterised in that the opening area provided by the air inlet opening (18) is larger than the opening area provided by the air outlet opening (19).
7. Dishwasher according to any of the preceding claims, characterised in that the first and/or the second duct portion (16, 17) is fluidically connected, by means of an inflow opening (31, 32) that is closable in a fluid-tight manner, to the atmosphere surrounding the duct portion (16, 17).
8. Dishwasher according to any of the preceding claims, comprising a washing container (3) providing a washing chamber (4), which container has a loading opening for loading items to be washed, wherein the air inlet opening (18) and the air outlet opening (19) are arranged below the loading opening.
9. Dishwasher according to either claim 7 or claim 8, characterised in that the inflow opening (31, 32) is arranged in a region of a base (9) of the dishwasher (1) below the washing container (3).
10. Dishwasher according to any of the preceding claims, characterised by a fan wheel (21) which is arranged in the air duct (15) and is connected downstream of the first evaporator portion (22) or the first evaporator in terms of flow in the direction of flow, and is connected upstream of the second evaporator portion (23) or the second evaporator in terms of flow in the direction of flow.
11. Dishwasher according to claim 10, characterised in that a passage opening (27) that is closable in a fluid-tight manner and fluidically connects the first duct portion (16) to the second duct portion (17) is provided in the direction of flow between the first evaporator portion (22) or the first evaporator and the fan wheel (21).
12. Dishwasher according to any of the preceding claims, characterised in that the air duct (15) is fluidically connected to a second duct (29) which, when loading, allows air to be supplied to a washing container wall.

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