Dishwasher with a drying device and method for drying the washed items

Abstract

The present invention relates to a dishwasher, in particular a commercial dishwasher, for cleaning dishes, which has a drying device, wherein the drying device comprises at least one light-emitting device. The present invention further relates to a method for drying dishes to be treated in a dishwasher.

Description

The present disclosure relates to a dishwasher, in particular a commercial dishwasher, for cleaning washware, in particular for cleaning dishes and / or cutlery, bottles or other containers and appliances. Commercial dishwashers are used in particular in the gastronomy sector and in the hotel sector.There are various types of dishwashers, in particular of commercial dishwashers, for example so-called dishwashers which comprise a wash chamber in which washware to be treated can be placed and treated, in particular cleaned, or so-called transport dishwashers in which washware to be treated is transported through the dishwasher, for example on a conveyor belt, optionally by means of one or more dishwashers, and is treated there, in particular cleaned and dried.In the case of dishwashers, it is furthermore customary for them to be designed such that a drying process can be carried out, with the result that the equipment to be treated can already be at least partially dried during the treatment and can be reused quicklyKnown methods of drying typically include mechanical drying methods such as blowers or heating devices that introduce hot air into the treatment area, for example a rinsing chamber, or circulate it through the treatment area in order to at least partially evaporate moisture. These methods are widely used and have been found to be effective in many applications. Nevertheless, there are several challenges associated with these conventional drying techniques.In particular, in some cases, the hot air may not reach all areas of the washware uniformly, which may lead to non-uniform drying and residual water spots. The evaporation of residual moisture is also partly ineffective. A blower moreover generates noise, which is regularly viewed as a noise nuisance and is perceived as unpleasant by the users.Furthermore, dishwashers are known from DE 10 2021 106 895 A1, CN 2 309 119 Y and CN 2 02 610 574 U, which use a UV light for disinfection or an infrared light source for supporting drying.It is therefore an object of the present invention to provide an improved dishwasher, in particular an improved commercial dishwasher, and a method for operating such a dishwasher, which takes into account in particular the aspects of drying or partial drying.This object is achieved by a dishwasher according to claim 1 and a method according to claim 24. Claims 2 to 23 relate to particularly preferred embodiments of the dishwasher according to claim 1. Claims 25 and 26 relate to particularly preferred embodiments of the method according to claim 24.The present invention relates to a dishwasher, in particular a commercial dishwasher, which comprises at least one treatment area which is designed such that washware to be treated during operation of the dishwasher can be partially or completely dried in this treatment area.According to the invention, the dishwasher has a drying device, wherein the drying device comprises at least one light-emitting device which is arranged in the treatment region or is arranged in such a way that it can emit light into the treatment region. Furthermore, the dishwasher according to the invention comprises a control device which is designed such that it sets the one or more light-emitting devices into a switched-on state at least for a predefined or determinable period of time when the dishwasher is in an operating state in which a drying operation is carried out.According to the invention, one or more light-emitting devices are used which emit light in a wavelength range of 450 nm in 650 nm.By irradiating the washware to be treated with light, in particular and preferably in the visible wavelength range, an evaporation process or drying process takes place. This evaporation process or drying process can act alone or in cooperation with other drying methods or drying processes.This leads to an improved drying process or drying process and to better and / or faster drying results.The evaporation rates are dependent on the wavelength and the power of the light emitted onto the washware to be treated and can be adapted depending on the field of application or depending on the configuration of the dishwasher, or also depending on the washware to be treated.It should be noted here that irradiation with light, in particular in the region of visible light, can even lead to evaporation rates which exceed the limit value for the thermal evaporation or evaporation. The inventors have recognized that such an effect can be utilized very effectively, in particular in the field of dishwashers, in particular industrial dishwashers, so that particularly energy-efficient drying is made possible.The dishwasher according to the present invention provides an improved drying process which can be adapted in particular well to the washware to be treated and also to the arrangement and positioning of the washware in the treatment region. In particular, it is thus possible to dispense at least partially, optionally also completely, with other drying methods, in particular fans and heaters, with the result that the disadvantages mentioned above are at least partially avoided or reduced.In this connection, it should be pointed out that even without the above-described effect according to which the drying device used in the dishwasher according to the invention can lead to evaporation rates which exceed the limit value for the thermal evaporation or evaporation, particularly good drying is ensured, optionally also in conjunction with other drying devices or drying methods.Drying by means of a light-emitting device also has the effect that the use of conventional drying devices, in particular heating and blower, can be reduced or even completely dispensed with. This leads in particular to a reduction in the noise which otherwise arises in particular as a result of the fan, which is very pleasant for the operating personnel (in the case of commercial dishwashers) or the user (in the case of domestic dishwashers).In addition, the light-emitting devices take up very little space, so that dishwashers with a smaller volume (or also with larger clearances etc.) can be provided.The control device can be programmable and enables a precise control of the drying process, which leads to a uniform and effective drying of the washware. The integration of the control device may also help optimize the power consumption by ensuring that the light emitting devices are only activated when they are actually needed.A further technical advantage is the reduction of moisture in the treatment area, even independently of the washware to be treated, which can also reduce the risk of unpleasant odors, for example.A targeted positioning of the light-emitting devices also assists in effectively drying regions of the washware which are difficult to access, which is often problematic in conventional drying methods. This allows more accurate and efficient drying to be achieved, which is particularly advantageous in commercial environments where fast and reliable drying operations are required. Positioning is supported in particular by the fact that the light-emitting devices are very small, in particular when LEDs are used, for example.Overall, a dishwasher according to the invention therefore offers a particularly and adaptable innovative solution for drying washware, which can improve both the efficiency and the effectiveness of the drying process by integrating light-emitting devices and a control device.The controller may further function as a central unit to coordinate various functions and components of the machine. This control device is preferably also responsible for monitoring and controlling the entire operation of the dishwasher, including the drying processes.The control device is designed to put the one or more light emitting devices in an on state for at least a predetermined or determinable period of time. This means that the control device can control the activation and deactivation of the light-emitting devices in time in order to ensure optimum drying. The predetermined or determinable time period can vary depending on various factors such as the type of washware or the desired drying intensity.It is also possible that the time period is controlled depending on sensors present in the treatment area or in other areas of the dishwasher. Such sensors may include temperature sensors and / or humidity sensors.The control device sets the one or more light emitting devices to an on state when the dishwasher is in an operation state in which a drying operation is performed. This ensures that the light emitting devices are activated only when they are actually needed, contributing to the energy efficiency and the prolongation of the lifetime of the devices.The control device is preferably designed such that the one or more light-emitting devices are in a switched-on state only when the dishwasher is in an operating state in which a drying process is carried out, which offers particular advantages in particular in dishwashers with a wash chamber to be opened, since when the treatment region or the wash chamber is opened by the user it is ensured that the light-emitting device does not emit radiation outwards and in particular not in the direction of the user.According to one embodiment, at least one light-emitting device is designed as a light-emitting diode, LED. The use of LEDs as light-emitting devices offers a particularly energy-efficient solution, since LEDs have a high efficiency and a lower energy consumption compared to conventional light sources. This contributes to reducing the total energy consumption of the dishwasher and thus makes it more environmentally friendly and cost effective in operation. Moreover, LEDs have a longer lifetime, which reduces maintenance costs and the need for frequent changes.A further advantage of using LEDs is their low heat development compared to other light sources. This is particularly advantageous in the environment of a dishwasher where excessive heat generation is undesirable. The low heat generation of the LEDs helps to control the temperature in the treatment area and prevents overheating of the washware, which increases the safety and quality of the drying process.In addition, LEDs offer the possibility of emitting light in different wavelengths, which can be used for specific drying requirements.According to a preferred embodiment, the dishwasher comprises at least one light-emitting device which emits light in a wavelength range, in particular of visible light, or in the vicinity of the range of visible light.This specific selection of the wavelength range is designed to improve the efficiency of the drying process by enabling optimum energy transfer to the washware. The wavelength range of 450 nm to 650 nm covers a large part of the visible light spectrum, which increases the flexibility in the selection of the light sources and at the same time ensures that the emitted radiation is safe for operation in a private or in a commercial environment.A preferred embodiment provides that the light is emitted in a narrower wavelength range from 500 nm to 550 nm. More preferred is an even narrower wavelength range of 510 nm to 530 nm, especially preferred is the wavelength range of 520 nm.It has been found that these narrower wavelength ranges are particularly suitable and lead to particularly high evaporation rates.Such a preferred wavelength range is also substantially different from infrared radiation outside the visible range, wherein with infrared radiation heat radiation is used to evaporate the moisture. Evaporation or drying by means of light in the visible range and in particular by means of light in the wavelength range from 510 nm to 530 nm is preferred in contrast and prevents excessive heating of the washware or at least reduces heating of the washware, in particular if light is emitted, for example, onto dry or already dried regions of the washware.According to a further embodiment, at least one light emitting device emits monochromatic or substantially monochromatic light. Monochromatic light, i.e. light of a single wavelength or of a very narrow wavelength range, can be specifically matched to specific materials or surfaces of the material to be treated in order to optimize the drying properties. Furthermore, certain monochrome light can affect the surface tension of water on the objects to be dried, thus evaporating the water more quickly.According to a further embodiment, at least one light-emitting device has a power in a range between 50 W and 200 W, wherein a power in a range between 100 W and 180 W is preferably provided, and a power in a range between 150 W and 180 W is particularly preferably provided.By defining the power ranges, it is ensured that the light-emitting device supplies sufficient energy to effectively dry the washware without consuming excessive energy. These specific power ranges of the light emitting device thus contribute to the efficiency and effectiveness of the drying operation in the dishwasher.According to a further embodiment, the dishwasher comprises a plurality of light-emitting devices, in particular LEDs, which are arranged in a treatment region. This arrangement of a plurality of light-emitting devices enables more uniform and efficient drying of the washware, since the light energy is distributed uniformly over the entire treatment region.The total power of the light emitting devices arranged in the treatment area is preferably in a range from 500 W to 2500 W. This power bandwidth ensures that sufficient energy is available to effectively dry the washware without thereby causing unnecessarily high energy costs. Particularly preferably, the total power of the light emitting devices is in a range of 1000 W to 1500 W, which is an optimum balance between drying efficiency and power consumption, also considering the efficiency of modern LEDs, which is in a range of 30% to 50%.According to a further embodiment of the dishwasher, all light-emitting devices provided in a treatment region have an identical wavelength characteristic or emit light of identical wavelengths. This provides the advantage that the light used for drying the washware has a consistent and uniform effect, which further increases the efficiency of the drying process.According to a further embodiment, the dishwasher comprises a treatment region which has a plurality of subareas, wherein at least one light-emitting device is provided in each of these subareas. This configuration enables a targeted and differentiated treatment of the washware within the treatment region.In particular, one or more light-emitting devices having a first wavelength characteristic and / or performance characteristic are arranged in a first subregion, while one or more light-emitting devices having a second wavelength characteristic and / or performance characteristic are arranged in a second subregion, wherein the second wavelength characteristic and / or performance characteristic is different from the first.This arrangement enables optimized drying of the washware, since different wavelengths can better address specific properties of the washware. The integration of these features increases the flexibility and efficiency of the dishwasher, which is of great advantage in particular in commercial use. The possibility of using different wavelengths for different subareas also opens up the adaptation capability of the machine to different types of washware and drying requirements.According to a further embodiment, the dishwasher comprises at least one receiving device for washware to be treated, which receiving device comprises a receiving surface having a predefined surface size for directly or indirectly receiving the washware to be treated, wherein this receiving device is preferably a dishwasher basket. However, the receiving device can also be realized by a depositing surface or a transport belt, in particular in transport dishwashers. a receiving surface can be defined, for example, by the base surface of a dishwasher basket, the surface size in this case corresponds to the size of the base surface of the dishwasher basket. A receiving surface can also be defined by a predefined surface in the dishwasher or on a conveyor belt of a conveyor dishwasher, on which washware to be treated can be positionedThe one or more light-emitting devices are preferably designed and arranged such that they emit a total radiation power on this receiving surface which lies in a range from 0.5 kW / m 2 to 2 kW / m 2 preferably in a range from 0.8 kW / m 2 to 1.5 kW / m 2, and in particular preferably in a range from 1 kW / m 2 to 1.5 kW / m 2. This specific radiation power is designed to ensure optimum drying of the washware by supplying sufficient energy to effectively evaporate the moisture without damaging the washware or consuming unnecessarily much energy.According to a further embodiment, one or more light-emitting devices are arranged above the washware to be treated or above a receiving surface of a receiving device for washware to be treated. The positioning of the light-emitting devices above the washware or the receiving surface ensures that the light strikes the surfaces of the washware directly, as a result of which uniform and effective drying is made possible. This arrangement minimizes shadow regions and ensures that even points of the washware which are difficult to access, such as depressions and corners, are illuminated sufficiently and therefore dried.According to a further embodiment, the dishwasher comprises one or more light-emitting devices which are arranged below the washware to be treated or below a receiving surface of a receiving device for washware to be treated. This positioning of the light-emitting devices below the washware enables direct and uniform irradiation of the underside of the washware, which leads to more efficient drying. This is particularly advantageous since the underside of the washware is often harder to dry when water accumulates there.In a particularly preferred embodiment, the light-emitting devices are arranged both above and below the washware in order to ensure the best possible drying even independently of the user's placement and positioning of the washware, for example within a washware basket.According to a further embodiment, one or more light emitting devices are arranged to be laterally of or laterally relative to the washware to be treated. This also enables multi-sided or even all-round irradiation of the washware.Furthermore, the one or more light-emitting devices are preferably arranged or fastened on or in a side wall of the dishwasher. This specific arrangement in or on the side wall offers the advantage that the devices are mounted firmly and securely, which facilitates maintenance and replacement. In addition, the interior of the dishwasher is thereby optimally utilized without additional structures or holders being required, which could restrict the space for the washware.In a preferred embodiment, one or more light-emitting devices are also introduced into the structure of the treatment space or the structures delimiting the treatment space. As a result, the light-emitting devices can be accommodated in a particularly protected manner. It is also possible to provide the light-emitting devices, in particular LEDs, behind covers, which allow the light to be emitted into the treatment region. These covers are preferably made of a material which is transparent or substantially transparent to the emitted wavelength, in particular provides transparency of more than 80%, preferably more than 90%, further preferably more than 95%. This also simplifies cleaning of the dishwasher or the treatment area itself, which should be carried out regularly.According to a further embodiment, the dishwasher comprises an additional device for drying the washware to be treated, in particular a fan and / or a heating device. This additional drying device works in combination with the light-emitting device provided in the treatment area, so that the advantages of different drying devices and methods can be used in combination.According to a further embodiment, the dishwasher comprises a cooling device for cooling the washware to be treated. This cooling device represents an additional functionality which goes beyond the drying of the washware and enables extended control over the state of the washware during and after the rinsing process or, in particular, after the drying process.The introduction of the cooling device is advantageous in particular in commercial applications in which rapid re-availability of the washware is required and in which washware preferably has to be below a specific temperature for further use, for example for cold beverages.According to a further embodiment, the control device of the dishwasher is configured to activate the cooling device in order to carry out a cooling process of the washware to be treated, which cooling process at least partially overlaps the drying process or is downstream of the drying process. This makes it possible to ensure that the washware has the desired temperature or does not exceed a specific temperature after the treatment.A particularly preferred embodiment is in particular characterized in that the control device and / or the at least one light-emitting device is or are designed such that light of different wavelengths or different wavelength ranges and / or with different power is emitted at different times during the drying process and / or in different sub-regions of the treatment region.This provides a high flexibility with regard to adapting the drying process. The drying process can have different sections over time, in which light of different wavelengths and / or powers can be emitted onto the washware in each case. Alternatively or additionally, it is possible to carry out the drying process differently in different subareas of the treatment area, with different temporal sequence and / or with different wavelengths or powers. It is therefore also possible to adapt the drying process to different types of washware which are treated and dried simultaneously and / or one after the other in the dishwasher, optionally in different positions, for example in different regions of a dishwasher.In particular tunable LEDs are preferred for this purpose as light-emitting devices, in which the wavelength and / or the power can preferably be adjusted.The control device can be designed in such a way that it can recognize or classify it into groups as a function of user inputs, such as the type of washware to be treated or the degree of soiling, or as a function of sensors which recognize a type of washware to be treated or a degree of soiling of the washware to be treated or another factor which has to be taken into account in the treatmentAccording to one embodiment, the described dishwasher is a dishwasher which comprises a wash container or a wash chamber which can preferably be opened and closed by the user, for example by means of a door or a hood, in order to introduce washware into the wash chamber or remove it from the wash chamber.Particularly preferably, the control device is designed such that the at least one light-emitting device is switched off when the wash container is not in a closed state. This ensures that the light-emitting devices provided for drying are switched off when the treatment room or the rinsing room can be viewed by the user, in particular also in order to prevent light from these devices from falling into the eye of the user.According to another embodiment, the dishwasher according to the invention is a transport dishwasher which comprises at least one treatment region in which a drying process can be carried out.In such a conveyor dishwasher, the light-emitting devices are preferably mounted such that they do not emit outwards, so that it is prevented that the light provided for drying does not accidentally fall into an eye of the user or users.According to the invention, a method for drying washware to be treated in a dishwasher is also provided, in particular in a commercial dishwasher, which comprises at least one treatment region which is designed such that washware to be treated during operation of the dishwasher is irradiated in this treatment region by means of at least one light-emitting device for a predetermined or determinable period of time.With regard to the advantages and further details for the realization of such a method according to the invention, reference is made to the above description of the dishwasher according to the invention and its preferred embodiments.The present disclosure is explained in more detail with reference to the following figure: FIG. 1 shows a schematic flow diagram of an embodiment of a dishwasher according to the invention.FIG. 1 shows a schematic flow diagram of an embodiment of a dishwasher 1 according to the invention, which is designed in particular for commercial use. The dishwasher 1 comprises a treatment region 2 in which the washware to be treated can be partially or completely dried during operation.The treatment area 2 contains several components, including one or more light-emitting devices 25 which are arranged in the treatment area in order to ensure or to assist drying of the washware. These light-emitting devices 25 are configured as LEDs in this embodiment and can emit light in a specific wavelength range. The LEDs selected in this embodiment are LEDs that emit light in a wavelength range of 510 nm to 530 nm. However, it is also possible to use light-emitting devices having different wavelength characteristics, in particular determinable LEDs.The dishwasher 1 is equipped with a control device 23 that controls the light-emitting devices 25. This control device 23 is programmed to switch on the light emitting devices 25 for a predetermined or determinable period of time when the dishwasher is in an operating state in which a drying operation is performed.The dishwasher schematically illustrated in FIG. 1 is a dishwasher in which the treatment chamber 2 is designed as a wash container which can be opened and closed by a user.In the upper region of the treatment region 2, an upper washing system 7 and an upper final rinse system 15 are arranged. These systems are responsible for the cleaning and rinsing of the washware.The treatment area 2 also comprises a lower washing system 8 and a lower post-rinsing system 16, which operate in a similar manner to the upper systems.In the treatment area there is also a rack 24 which receives the washware to be treated. The light-emitting devices 25 or LEDs are arranged in such a way that they allow optimum exposure of the washware to the light-emitting devices 25.In this preferred embodiment, the light emitting devices 25 are arranged both above and below the basket 24 in order to ensure uniform drying of the washware. In addition, light emitting devices 25 are arranged in two side regions.The light-emitting device 25 is only schematically illustrated, wherein only 6 light-emitting devices are shown by way of example and schematically in FIG. 1.In a particularly preferred embodiment, however, 5-30 light-emitting devices in total are preferably provided in an upper region and / or 5-30 light-emitting devices are preferably provided in a lower region. Laterally arranged light-emitting devices are optional, wherein in this embodiment, preferably 5-20 light-emitting devices are provided on each of two side walls.Some dishwashers designed as automatic dishwashers or automatic programming machines comprise a door which enables access to the treatment chamber and loading of the treatment chamber with washware to be treated. In such cases, it is preferable to provide the light-emitting device only on the side walls, but not also on or in the door.The dishwasher 1 further comprises a wash tub 3 equipped with a tank 4 and a screen system 5. The tank 4 contains water (also mixed with detergent) which is filtered through the screening system 5 before it reaches the wash tub 3. A wash pump 6 provides for the circulation of water through the upper and lower wash systems.A water inlet 9 introduces fresh water into the dishwasher, which is controlled by a solenoid valve 10 and a water safety device 11. The water then passes into a boiler 12 equipped with a boiler heater 13 to heat the water to the desired temperature. A final rinse pump 14 ensures that the heated water circulates through the upper and lower final rinse systems 15, 16 after levelling agent has been supplied, if appropriate, via a metered pump.The dishwasher 1 also comprises a drain pump 17 which is responsible for disposing of the waste water 18. In addition, a cleaner 19 and a cleaner metering pump 20 as well as a final rinse agent 21 and a metering pump for final rinse agent 22 are present in order to introduce the cleaning and final rinse agents into the rinsing process.The control device 23 monitors and controls the overall operation of the dishwasher, including the light emitting devices 25, the washing and post-rinsing systems, and the pumps and valves.The dishwasher can also be equipped with additional drying and cooling devices in order to further optimize the drying process and to cool the washware after drying. These additional devices are also controlled by the controller 23 to provide seamless and efficient operation.List of reference numbers:1 Dishwasher 2 Washing container / treatment area 3 Tank 4 Tank heater 5 Screen system 6 Wash pump 7 Upper wash system 8 Lower wash system 9 Water inlet 10 Solenoid valve 11 Water engineering safety device 12 Boiler 13 Boiler heater 14 Final rinse pump 15 Upper final rinse system 16 Lower final rinse system 17 Caustic pump 18 Wastewater 19 Cleaner 20 Cleaner metering pump 21 Final rinse agent 22 Metering pump for final rinse agent 23 Machine control / control device 24 Rinse basket / receiving device 25 Light-emitting device

Claims

Dishwasher (1), in particular a commercial dishwasher, comprising at least one treatment area (2) which is designed such that washware to be treated during operation of the dishwasher (1) can be partially or completely dried in this treatment area (2), wherein the dishwasher has a drying device, wherein the drying device comprises at least one light-emitting device (25) which is arranged in the treatment area (2) or is arranged such that it can emit light into the treatment area (2), wherein the dishwasher (1) comprises a control device (23) which is designed such that it sets the one or more light-emitting devices (25) into a switched-on state at least for a predefined or determinable period of time when the dishwasher (1) is in an operating state in which a drying operation is carried out, wherein at least one light emitting device (25) is configured to emit light in a wavelength range of 450 nm to 650 nm.Dishwasher (1) according to claim 1, characterised in that at least one light-emitting device (25) is designed as a light-emitting diode, LED.Dishwasher (1) according to claim 1 or 2, characterised in that at least one light-emitting device (25) is designed such that it emits light in a wavelength range from 500 nm to 550 nm, preferably in a wavelength range from 510 nm to 530 nm, in particular preferably in a wavelength range from 520 nm.Dishwasher (1) according to one of the preceding claims, characterized in that at least one light-emitting device (25) is designed such that it emits monochromatic or substantially monochromatic light.Dishwasher (1) according to one of the preceding claims, characterized in that at least one light-emitting device (25) has a power in a range between 50 W and 200 W, preferably between 100 W and 180 W, particularly preferably between 150 W and 180 W.Dishwasher (1) according to one of the preceding claims, characterized in that a plurality of light-emitting devices (25), in particular LEDs, are arranged in a treatment region (2), wherein the total power of the light-emitting devices (25) arranged in the treatment region (2) is in a range from 500 W to 2500 W, in particular in a range from 1000 W to 1500 W.Dishwasher (1) according to one of the preceding claims, characterized in that a plurality of light-emitting devices are arranged in a treatment region (2), wherein all light-emitting devices (25) provided in this treatment region (2) have an identical wavelength characteristic or emit light of identical wavelengths.Dishwasher (1) according to one of the preceding claims, characterized in that a treatment region (25) has a plurality of subareas in which at least one light-emitting device (25) is respectively provided, wherein one or more light-emitting devices having a first wavelength characteristic are arranged in a first subarea, while one or more light-emitting devices having a second wavelength characteristic which differs from the first wavelength characteristic are arranged in a second subarea.Dishwasher (1) according to one of the preceding claims, characterized in that a treatment region (25) has a plurality of subareas in which at least one light-emitting device (25) is respectively provided, wherein one or more light-emitting devices having a first performance characteristic are arranged in a first subarea, while one or more light-emitting devices having a second performance characteristic which differs from the first performance characteristic are arranged in a second subarea.Dishwasher (1) according to one of the preceding claims, characterized in that it comprises at least one receiving device (24) for washware to be treated, which receiving device comprises a receiving region having a predefined area size for the direct or indirect receiving of the washware to be treated, wherein the one or more light-emitting devices (25) are designed and arranged such that they emit overall a radiation power onto this receiving surface which is in a range from 0.5 kW / m 2 to 2 kW / m 2, preferably in a range from 0.8 kW / m 2 to 1.5 kW / m 2, in particular preferably in a range from 1 kW / m 2 to 1.5 kW / m 2.Dishwasher (1) according to claim 10, characterised in that the receiving device (24) is a wash basket (24), a depositing surface or a transport belt.Dishwasher (1) according to one of the preceding claims, characterised in that one or more light-emitting devices (25) are arranged above the washware to be treated or above a receiving region of a receiving device for washware to be treated.Dishwasher (1) according to one of the preceding claims, characterised in that one or more light-emitting devices (25) are arranged below the washware to be treated or below a receiving region of a receiving device (24) for washware to be treated.Dishwasher (1) according to one of the preceding claims, characterised in that both one or more light-emitting devices (25) are arranged above the washware to be treated or above a receiving region of a receiving device for washware to be treated and one or more light-emitting devices (25) are arranged below the washware to be treated or below a receiving region of a receiving device (24) for washware to be treated.Dishwasher (1) according to one of the preceding claims, characterized in that one or more light-emitting devices (25) are arranged in such a way that they are located laterally relative to the washware to be treated, wherein the one or more light-emitting devices (25) are preferably arranged or fastened on or in a side wall of the dishwasher (1), in particular on or in a side wall which lies in the treatment region (2) or is arranged adjacent thereto.Dishwasher (1) according to one of the preceding claims, characterised in that it comprises an additional device for drying the washware to be treated, in particular a fan and / or a heating device.Dishwasher (1) according to one of the preceding claims, characterized in that it comprises a cooling device for cooling the washware to be treated.Dishwasher (1) according to claim 17, characterised in that the control device (23) is designed such that the cooling device is activated such that it carries out a cooling process of the washware to be treated, which cooling process is arranged downstream of the drying process.Dishwasher (1) according to claim 17 or 18, characterised in that the control device (23) is designed such that the cooling device is activated such that it carries out a cooling process of the washware to be treated which at least partially overlaps the drying process.Dishwasher (1) according to one of the preceding claims, characterized in that the control device (23) and / or the at least one light-emitting device (25) is or are designed such that light of different wavelengths or different wavelength ranges and / or with different power is emitted at different times during the drying process and / or in different sub-regions of the treatment region.Dishwasher (1) according to one of the preceding claims, characterized in that it is a dishwasher which comprises a wash container (2).Dishwasher (1) according to claim 21, characterised in that the control device (23) is designed such that the at least one light-emitting device (25) is switched off when the wash tub is not in a closed state.Dishwasher (1) according to one of claims 1 to 20, characterised in that it is a transport dishwasher which comprises at least one treatment region (2) in which a drying process can be carried out.Method for drying washware to be treated in a dishwasher, in particular in a dishwasher (1) according to one of the preceding claims, characterized in that the washware to be treated is irradiated by means of at least one light-emitting device (25) over a predetermined or determinable period of time, the light emitted by the light-emitting devices (25) being in a wavelength range from 450 nm to 650 nm.Method according to claim 24, characterised in that the light emitted by the light-emitting devices (25) lies in a wavelength range from 500 nm to 550 nm, preferably in a wavelength range from 510 nm to 530 nm, in particular preferably in a wavelength range from 520 nm.Method according to claim 24 or 25, characterised in that it is arranged downstream of a drying process by means of a blower and / or a heater and / or is carried out at least partially overlapping.

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