Cleaning appliance and method for cleaning articles to be cleaned

Abstract

What is proposed is a cleaning appliance (110) for cleaning articles to be cleaned (116). The cleaning appliance (110) comprises at least one cleaning chamber (114) and at least one nozzle (123) for applying at least one cleaning fluid (118) to the articles to be cleaned (116) within the cleaning chamber (114). The cleaning appliance (110) also comprises at least one temperature sensor (168), which is arranged in at least one desired jet region (166) of the nozzle (123). The cleaning appliance (110) also comprises a control unit (157), which is designed to analyze at least one sensor signal of the temperature sensor (168) and to evaluate a jet behavior of the nozzle (123) on the basis of the sensor signal.

Claims

1. A cleaning appliance for cleaning articles to be cleaned, said cleaning appliance comprising at least one cleaning chamber and at least one nozzle for applying at least one cleaning fluid to the articles to be cleaned within the cleaning chamber, and said cleaning appliance further comprising at least one temperature sensor, wherein the temperature sensor is arranged in at least one desired jet region of the nozzle, and said cleaning appliance further comprising a control unit, wherein the control unit is programmed to analyze at least one sensor signal of the temperature sensor and to evaluate a jet behavior of the nozzle on the basis of the sensor signal, wherein the cleaning appliance has at least one comparison temperature sensor for detecting at least one temperature of the cleaning fluid, wherein the evaluation of the jet behavior includes comparing the sensor signal of the temperature sensor with the at least one temperature of the cleaning fluid, wherein the cleaning appliance has a plurality of the temperature sensors at different locations within the cleaning chamber, and wherein the control unit is programmed to detect a spatial profile of a temperature within the cleaning chamber, and wherein the cleaning appliance comprises a plurality of nozzles and the plurality of temperature sensors, and wherein the plurality of temperature sensors are arranged in each desired jet region of each of the nozzles, or wherein the plurality of temperature sensors are arranged in one desired jet region of one of the nozzles.

2. The cleaning appliance as claimed in claim 1 wherein the cleaning appliance has at least one temperature-control device for heating the cleaning fluid.

3. The cleaning appliance as claimed in claim 1, wherein the control unit is programmed to compare the sensor signal of the temperature sensor with at least one desired signal and to evaluate the jet behavior of the nozzle on the basis of this comparison.

4. The cleaning appliance as claimed in claim 3, wherein the control unit is programmed in such a way that during the comparison a comparison value is determined, wherein the comparison value is compared with at least one threshold value and a measure for the jet behavior of the nozzle is determined from this comparison of the comparison value with the at least one threshold value.

5. The cleaning appliance as claimed in claim 4, wherein the cleaning appliance has at least one comparison temperature sensor for detecting at least one temperature of the cleaning fluid and the control unit is programmed to determine at least one temperature difference from the sensor signal of the temperature sensor and at least one temperature of the cleaning fluid.

6. The cleaning appliance as claimed in claim 5, wherein the control unit is programmed to compare the temperature difference with the at least one threshold value.

7. The cleaning appliance as claimed in claim 6, wherein the control unit is programmed to determine that the jet behavior of the nozzle is defective when the temperature difference or a value of the temperature difference reaches the threshold value or exceeds the threshold value.

8. The cleaning appliance as claimed in claim 1, wherein the control unit is programmed to detect a time curve of the jet behavior of the nozzle.

9. The cleaning appliance as claimed in claim 1, wherein the control unit is programmed to carry out at least one predefined action when the jet behavior of the nozzle demonstrates a deviation from a predefined norm or a predefined normal range.

10. The cleaning appliance as claimed in claim 9, wherein the action is selected from the group consisting of: an output of an error message; an output of a notification message; a stopping of a cleaning process; a stopping of a transport device of the cleaning appliance; a modification of a speed of a transport device of the cleaning appliance; a modification of a temperature of the at least one cleaning fluid; a modification of washing mechanics of the cleaning appliance; a logging of the deviation of the jet behavior in at least one log; and a transmission of an electronic message regarding the deviation of the jet behavior.

11. The cleaning appliance as claimed in claim 10, wherein the modification of the speed of the transport device of the cleaning appliance is a reduction of the speed.

12. The cleaning appliance as claimed in claim 10, wherein the modification of the temperature of the at least one cleaning fluid is a modification of a temperature of the at least one cleaning fluid in at least one tank.

13. The cleaning appliance as claimed in claim 10, wherein the transmission of the electronic message regarding the deviation of the jet behavior is configured to be conducted via at least one electronic interface.

14. The cleaning appliance as claimed in claim 13, wherein the transmission of the electronic message regarding the deviation of the jet behavior is configured to be conducted by means of at least one of e-mail or SMS.

15. The cleaning appliance as claimed in claim 14, wherein the nozzles are arranged completely or in part in a spray arm, and wherein the spray arm is a rotatably mounted spray arm.

16. The cleaning appliance as claimed in claim 14, wherein the desired jet regions of the nozzles are formed separately from one another.

17. The cleaning appliance as claimed in claim 1, wherein the control unit is programmed to detect a time curve of the jet behavior of the at least one nozzle and to determine when the jet behavior of the at least one nozzle changes with the scope of operation of the cleaning appliance.

18. The cleaning appliance as claimed in claim 1, wherein the control unit comprises at least one processor and at least one data memory, wherein the control unit contains at least one user interface and/or at least one data interface.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further details and features of the invention will emerge from the following description of preferred exemplary embodiments, in particular in conjunction with the dependent claims. Here, the respective features can be implemented in isolation or in combination with one another. The invention is not limited to the exemplary embodiments. The exemplary embodiments are illustrated schematically in the drawings. Here, like reference numerals in the individual drawings denote like or functionally similar elements or elements that correspond to one another with regard to their functions.

(2) More specifically:

(3) FIG. 1 shows a first exemplary embodiment of a cleaning appliance according to the invention in the form of a one-chamber dishwasher;

(4) FIG. 2 shows a second exemplary embodiment of a cleaning appliance according to the invention in the form of a cleaning and disinfecting device;

(5) FIGS. 3A and 3B show two different sectional illustrations of a third embodiment of a cleaning appliance according to the invention in the form of a pass-through dishwasher.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

(6) FIG. 1 shows a first exemplary embodiment of a cleaning appliance 110 according to the invention in a schematic sectional illustration. The cleaning appliance 110 is embodied in this case by way of example as a one-chamber dishwasher 112, in particular as a commercial one-chamber dishwasher. Reference can be made by way of example to DE 10 2008 015 796 B4 for examples of possible embodiments of one-chamber dishwashers 112 of this type. Other embodiments are also possible in principle.

(7) The cleaning appliance 110 contains at least one cleaning chamber 114. Cleaning fluid 118 is applied to articles to be cleaned 116, for example crockery, in the cleaning chamber 114. One or more fluid devices 120, also referred to as application devices, can be provided for this application and in the illustrated exemplary embodiments can comprise by way of example a rinse nozzle system 122 and a secondary rinse nozzle system 124. The fluid device 120 comprises a plurality of nozzles 123, which for example can be arranged in spray arms 125 of the fluid device 120, for example in rotating spray arms 125. The nozzle systems 122, 124 can be arranged for example within the cleaning chamber 114 above and/or below a rack 126, in which the articles to be cleaned 116 are received. The cleaning chamber 114 can be loaded with the articles to be cleaned 116 for example via a door 128, for example a front hatch.

(8) The rinse nozzle system 122 can be fed for example via rinse lines 130, a rinse pump 132 and via a 3-way valve 134 with cleaning fluid 118, for example a cleaning solution, from a rinse tank 136, which can be disposed for example in the base region of the cleaning chamber 114. The optional secondary rinse nozzle system 124 can be supplied for example via secondary rinse lines 138, a secondary rinse valve 140, and a secondary rinse pump 142 with cleaning fluid 118 from a secondary rinse tank 144, for example can be supplied with secondary rinse fluid in the form of a final rinse solution. The secondary rinse tank 144 can be supplied for example with fresh water via a fresh water feed line 146. The cleaning appliance 110 can also contain a drainage line 148, which for example can be connected to the rinse tank 136 via the 3-way valve 134, and which optionally can contain a drainage pump 150 and which optionally can be connected to an outflow 152.

(9) The cleaning appliance 110 can also contain at least one temperature-control device 153 for controlling the temperature of the at least one cleaning fluid 118. By way of example, the cleaning appliance 110 can contain at least one heating element 154 for heating the cleaning fluid 118 in the rinse tank 136. The heating device 110 can also contain a further heating element 156 in the secondary rinse tank 144 for heating the cleaning fluid 118 received there in the form of the secondary rinse fluid. By way of example, the secondary rinse tank 144 can be formed as a boiler and/or can contain a flow-type heater or can be connected to a flow-type heater.

(10) By way of example, at least one cleaning program can be performed in the cleaning appliance 110, which for example can be formed as a batch dishwasher. By way of example, at least one control unit 157 can be provided for this purpose, by means of which a program sequence can be controlled. In this cleaning program, a first program step for example can be carried out, in which the articles to be cleaned 116 are rinsed from the rinse tank 136.

(11) This rinsing can be implemented for example in a recirculation mode via the rinse pump 132, which can also be referred to as a recirculation pump. The rinse fluid can then be discharged partially or fully from the rinse tank 136 via the drainage pump 150 and the 3-way valve 134. Parallel to the rinse step, a preparation of secondary rinse fluid, for example a heating of secondary rinse fluid, can already be performed in advance in the secondary rinse tank 144. In a further program step, after the rinse step, a secondary rinsing or final rinsing of the articles to be cleaned 116 with a cleaning fluid from the secondary rinse tank 144 can then be performed, wherein this can be performed in a single run or optionally likewise in a recirculation mode. One or more further program steps can follow, for example one or more drying steps, before the cleaning program can be completed.

(12) The control unit 157 comprises for example at least one processor 158 and at least one data memory 160. The control unit 157 can also contain at least one user interface 162 and/or at least one data interface 164, for example for the wireless or wired exchange of data and/or control commands.

(13) Depending on the program step, the nozzles 123 of the cleaning appliance 110 have a desired jet region, which is illustrated in FIG. 1 in a dashed manner for an exemplary nozzle and which is denoted by way of example by the reference numeral 166. This desired jet region 166 by way of example can be conical or fan-shaped or club-shaped. The desired jet region 166 can be different for each of the nozzles 123. These desired jet regions 166 of the individual nozzles 123 can be formed separately from one another, but can also overlap entirely or in part. Furthermore, the desired jet regions 166 of the individual nozzles 123 can change during a program sequence, since for example various nozzles 123 can be switched on or off during the above-described program and/or can be acted on by different pressures of the cleaning fluid 118. However, it is also possible in principle to determine, for example empirically, for a correctly functioning nozzle 123, the desired jet region 166 that this nozzle is associated with at the particular moment of operation.

(14) In accordance with the invention the cleaning appliance 110 also comprises at least one temperature sensor 168 within the cleaning chamber 114. By way of example, this temperature sensor 168 can be associated with a specific nozzle 123, as is shown by way of example in FIG. 1 on the basis of the outermost right nozzle of the upper spray arm of the secondary rinse nozzle system 124. The temperature sensor 168 is particularly preferably arranged in a desired jet region 166 of a nozzle 123 which, as is known in general or from experience, tends particularly towards becoming constricted, blocked or demonstrating other deviations from a normal behavior. As discussed above, this can be the case in particular for the outer nozzles 123 in one or more spray arms 125, in particular in rotatably mounted spray arms.

(15) The at least one temperature sensor 168 generates at least one sensor signal, which can be transmitted for example to the control unit 157. The control unit 157 is designed to analyze the sensor signal and to evaluate a jet behavior of the nozzle on the basis of the sensor signal.

(16) By way of example, at least one comparison value, i.e. at least one threshold value, can be predefined in the control unit 157 for this purpose, for example can be stored in the data memory 160, with which value the sensor signal can be compared directly or following processing. Alternatively or additionally, the cleaning appliance 110 can contain at least one comparison temperature sensor 170, which is designed to detect a temperature of the cleaning fluid 118. By way of example, at least one comparison temperature sensor 170 can be arranged in at least one tank of the cleaning fluid 118, for example, as shown by way of example in FIG. 1, in the rinse tank 136 and/or in the secondary rinse tank 144. The one or more comparison temperature sensors 170 can be designed to transmit at least one comparison temperature signal directly or indirectly to the control unit 157. The control unit 157 can be designed accordingly to determine at least one temperature difference from the temperature signal of the temperature sensor 168 and the temperature of the cleaning fluid 118 determined by means of the comparison temperature sensor 170. By way of example, the control unit 157 can also be designed to check whether the temperature difference lies in a normal range, for example by comparing the temperature difference with at least one threshold value. By way of example, as discussed above, it is thus possible to determine a defective jet behavior of the nozzle 123 when the temperature difference or a value of the temperature difference reaches the threshold value or exceeds the threshold value. Furthermore, a plurality of temperature sensors 168 can be provided within the cleaning chamber 114, by means of which temperature sensors a temperature profile within the cleaning chamber 114 can be created.

(17) In FIG. 2 a further exemplary embodiment of a cleaning appliance 110 according to the invention is shown, likewise in a sectional illustration similarly to FIG. 1. In this exemplary embodiment the cleaning appliance 110 is formed as a cleaning and disinfecting device 212. The cleaning appliance 110 again comprises a cleaning chamber 114 having a door 128, for example a front hatch. Articles to be cleaned 116, for example in the form of one or more vessels or containers for receiving large quantities of human or animal excretions, can be received in the cleaning chamber 114. By way of example, these containers can have a receiving volume of at least 100 ml, preferably of at least 200 ml, or at least 300 ml. The articles to be cleaned 116 can be held for example in an appropriate mount 214. This mount 214 is preferably formed in such a way that as the door 128 is closed the articles to be cleaned 116 are automatically emptied into an outflow 152, which in particular can comprise a siphon bend or another type of odor block or odor trap.

(18) Cleaning fluid 118 can be applied to the articles to be cleaned 116 in the cleaning chamber 114. For this purpose, a fluid device 120 in the form of a nozzle system 218 can again be provided. The nozzle system 218 comprises one or more nozzles 123. Just one nozzle 123 is shown by way of example in FIG. 2, however a plurality of nozzles 123 can also be provided, for example at different locations within the cleaning chamber 114. The at least one nozzle 123 again has, similarly to the illustration of the exemplary embodiment according to FIG. 1, a desired jet region 166 denoted by way of example by the reference numeral 166. The nozzle system 218 can be fed for example via a line system 220 and optionally a pump 222 from one or more tanks 224. Here, different types of cleaning fluids 118 can also be used in succession. By way of example, cold, aqueous cleaning fluid can first be applied, for example following the emptying into the outflow 152, and heated, and aqueous cleaning fluid can then be applied in a further step, optionally with addition of one or more cleaning agents and/or one or more disinfectants. Hot steam can then optionally be applied, for which purpose the cleaning appliance 110 can comprise a steam generator (not illustrated in FIG. 2), for example. The different cleaning fluids 118 can be applied via the same fluid system 120 and/or also via different fluid systems. In order to generate heated cleaning fluid 118 and/or in order to generate hot steam, one or more temperature-control devices 153 can again be provided, for example one or more heating elements 226.

(19) Once the cleaning fluid 118 has been applied to the articles to be cleaned 116, a drying phase can follow. During this drying phase, fresh air and/or also hot air for example can be introduced into the cleaning chamber 114, for example forcibly via a fan (not illustrated in FIG. 2). With this forced introduction of fresh air and/or heated air, the moist air present in the cleaning chamber 114 and/or the moist steam present in the cleaning chamber can be displaced via a bypass 228, optionally by means of at least one check valve 230, into the outflow 152, bypassing the odor trap or the siphon bend 216. In this way, it can be ensured that no moist air and no hot steam can pass into the ambient environment when the door 128 is opened.

(20) Similarly to the embodiment of the cleaning appliance 110 according to FIG. 1, the cleaning appliance 110 in the present case as well again contains at least one temperature sensor 168, which is arranged in the desired jet region 166 of the at least one nozzle. By way of example, at least one sensor signal can again be generated, which is transmitted to at least one control unit 157 of the cleaning and disinfecting device 212. The control unit 157 can again be formed similarly to the above control unit 157 of the cleaning appliance 110 according to FIG. 1, for example. It can again be designed to evaluate a jet behavior of the at least one nozzle 123 on account of a sensor signal of the temperature sensor 168. This can again be implemented for example by comparison with at least one normal value and/or at least one threshold value, and/or by establishing a difference. At least one comparison temperature sensor 170 can again be provided, for example in the tank 224, in order to determine at least one temperature of the cleaning fluid 118. At least one temperature difference can be determined from the sensor signal of the temperature sensor 168 and the temperature of the cleaning fluid, which for example can be derived directly or indirectly from a sensor signal of the comparison temperature sensor 170. The one or more temperature differences can then again be examined for example in order to ascertain whether this temperature difference or these temperature differences lies/lie in a normal range, for example by means of a comparison with at least one threshold value. By way of example, it can be ensured in this way that the actual jet region of the at least one nozzle 123 matches the desired object region to such an extent that a hygienization effect is ensured.

(21) FIGS. 3A and 3B illustrate a further exemplary embodiment of a cleaning appliance 110 according to the invention. The cleaning appliance 110 is formed in this exemplary embodiment as a pass-through dishwasher 312 and has a transport device 314, by means of which articles to be cleaned 116, for example crockery, can be transported through a cleaning chamber 114 of the cleaning appliance 110. By way of example, the cleaning appliance 110 can be formed as a rack conveyor dishwasher and can be designed to transport the articles to be cleaned 116 in transport racks 316, or can be formed as a flight-type dishwasher, in which the articles to be cleaned 116 are transported directly on a conveyor belt, as shown in this exemplary embodiment.

(22) The articles to be cleaned 116 can be transported by means of the transport device 314 in a transport direction 318 from an entry zone 320 to a discharge zone 322. The cleaning chamber 114 can be divided here into a plurality of zones, wherein for example a pre-removal zone 324, a wash zone 326, and a final rinse zone 328 can be provided. These zones can then also be followed by at least one drying zone 330, in which the articles to be cleaned 116 are dried by means of a fan 332.

(23) Zones 324, 326 and 328 can be referred to generally as rinse zones 334, within which application devices 336 in the form of nozzle systems comprising nozzles 123 are provided in order to apply at least one cleaning fluid 118 to the articles to be cleaned 116.

(24) A pre-removal nozzle system 338 can thus be provided in the pre-removal zone 324, which pre-removal nozzle system is fed via a pre-removal pump 340 from a pre-removal tank 342. A wash zone nozzle system 344 can be provided in the wash zone 326, which wash zone nozzle system can be fed via a wash zone pump 346 from a wash tank 348. The final rinse zone 328 can contain a pump final rinse section 350 and a fresh water final rinse section 352, which follows in the transport direction 318. The pump final rinse section 350 has a pump final rinse nozzle system 354, and the fresh water final rinse section 352 has a fresh water final rinse nozzle system 356. Whereas the pump final rinse section nozzle system 354 is fed from a final rinse tank 358 via a final rinse pump 360, the fresh water final rinse section nozzle system 356 is fed via a fresh water feed line 362 with fresh water from a fresh water connection point 364 in a building. The fresh water feed line 362 can comprise for example a temperature-control device 153 in the form of a heating device 366, by means of which the fed fresh water can be heated, for example to a temperature from 80 C. to 100 C., preferably to a temperature of at least 85 C. The fresh water feed line 362 can be guided optionally via at least one heat recovery device 368, in which waste heat of the cleaning appliance 110 can be used in order to heat fed fresh water.

(25) The articles to be cleaned 116 can be guided continuously or discontinuously through the rinse zones 334 by means of the transport device 314 before the articles to be cleaned 116 are dried in the drying zone 330. The rinse zones 334 can each be terminated by separation curtains 370.

(26) The cleaning appliance 110 preferably uses a number of types of cleaning fluid 118 in the form of rinse fluids, which are preferably all aqueous rinse fluids. Fresh water is thus preferably used in the fresh water rinse section 352 as rinse fluid, optionally with added final rinse aid. In the fresh water final rinse section 352, the rinse fluid comes into contact just once with the articles to be cleaned 116. By contrast, in the pump final rinse section 350, final rinse liquid from the final rinse tank 358 is applied to the articles to be cleaned 116 in a recirculation mode. In the wash tank 348 the rinse liquid can be mixed for example with the cleaning agent, for example cleaning solution. In the wash zone 326 the articles to be cleaned 116 can be cleaned in a recirculation mode using the rinse liquid from the wash tank 348. The articles to be cleaned 116 can be acted on in the pre-removal zone 324 in the recirculation mode.

(27) As discussed above, the cleaning fluid 118 in the form of the rinse liquids can be mixed in the tanks 342, 348 and 358 with one or more detergent substances. For this purpose, one or more metering devices can be provided, which are not indicated in FIG. 3A or FIG. 3B. For example, a metering device can optionally be provided at the fresh water feed line 362, by means of which metering device a final rinse agent and/or a disinfectant can be fed to the fresh water final rinse section 352. The connection of the at least one metering point can be before and/or after the heating device, for example. Alternatively or additionally, a metering device can be provided at the final rinse tank 358, by means of which a final rinse agent and/or a disinfectant can be metered into the final rinse tank 358. By way of example, at least one metering device can optionally be provided in the wash zone 326, by means of which metering device one or more cleaning agents can be metered into the wash tank 348. Alternatively or additionally, at least one metering device can be provided in the pre-removal zone 324, by means of which metering device(s) at least one cleaning agent can be metered into the pre-removal tank 342. The metering device(s) can be provided individually, in pairs or in specified combinations. A different arrangement, combination and type of metering are also possible, however, in principle.

(28) The cleaning appliance 110 in the illustrated arrangement also again can contain at least one control unit 157, which for example can be formed similarly to the control units in FIGS. 1 and 2. Here, the control unit may be for example a central machine control unit, which can also be formed in a decentralized manner, however, in principle. By way of example, one or more cleaning programs can be controlled in the cleaning appliance 110 by means of the at least one control unit 157. The control unit 157 can be connected in particular to at least one feed valve 372, which can control a fresh water feed, and/or can be connected to one or more of the specified metering devices in order to control these elements. The control unit 157 for example can also be connected wholly or partially to the pumps 340, 346 and 360, and can control these pumps. Furthermore, the control unit 157 can be connected for example to the at least one transport appliance 314, and can control the transport appliance 314. The control unit 157 can be formed for example wholly or partially as a regulation device and/or can comprise at least one regulation.

(29) The cleaning appliance 110 can again contain one or more sensors for detecting one or more operating parameters, similarly to the cleaning appliances 110 in the exemplary embodiments according to FIGS. 1 and 2. The cleaning appliance 110 can thus contain, for example, one or more sensors for detecting a feed and/or a concentration of one or more components of the rinse liquid. The sensors can be generally connected directly or indirectly to the at least one control unit 157. The cleaning appliance 110 can thus contain, for example, at least one flowmeter for detecting a volumetric flow and/or mass flow of a feed of fresh water. Alternatively or additionally, the cleaning appliance 110 can also contain one or more sensors in the tanks 342, 348 and 358. By way of example, turbidity sensors and/or conductivity sensors can be provided there, by means of which for example a cleaning agent concentration and/or a degree of soiling can be detected. In order to carry out the regulation of a feed of one or more components of the one or more rinse liquids of the cleaning appliance 110, for example in order to regulate a fresh water feed and/or in order to regulate a metering of cleaning agent, the control unit 157 can comprise for example one or more regulators, which for example can be implemented in the form of a software and/or in the form of a hardware. These can detect one or more actual values, for example by means of the sensors and/or by means of a flowmeter, and can regulate a feed to at least one desired value, for example by means of the specified metering devices and/or the feed valve 372.

(30) FIG. 3A shows a sectional illustration of the cleaning appliance 110 parallel to the transport direction 318. In FIG. 3B a sectional illustration perpendicular to the transport direction 318 is shown by way of example, for example a sectional illustration perpendicular to the transport direction 318 through the pump final rinse section 350. Similarly, however, sectional illustrations at other locations within the pass-through dishwasher 312 could also be shown in principle, for example through the pre-removal zone 324, the wash zone 326 or through the final rinse zone 328 in the region of the fresh water final rinse section 352.

(31) The illustration according to FIG. 3B shows that for example at least one temperature-control device 153, for example in the form of a heating device 366, can again be arranged within the tank, in this case the final rinse tank 358. The illustration according to FIG. 3B also shows that the application device 336 of the pump final rinse section 350 can again contain spray arms 125, for example above and below the transport device 314, which spray arms can each have one or more nozzles 123. These nozzles again each have a desired jet region 166, which is illustrated in FIG. 3B by way of example for the outermost nozzle 123 of the lower spray arm 125. At least one temperature sensor 168, which for example can again be directly or indirectly connected to the control unit 157 and/or can directly or indirectly or in another way transmit at least one sensor signal to the control unit 157, is again provided by way of example in this desired jet region 166 of this nozzle 123. The control unit 157 is designed to analyze this sensor signal of the at least one temperature sensor 168 and to evaluate a jet behavior of this at least one nozzle 123 on the basis of this sensor signal. For this purpose, a comparison with at least one threshold value and/or with at least one normal range can be performed, as also in the other exemplary embodiments. Alternatively or additionally, as is also the case in the other exemplary embodiments, at least one comparison temperature sensor 170 in a tank of the cleaning fluid 118, for example in the final rinse tank 358, can be used again as reference. Accordingly, at least one temperature difference can again be determined from the sensor signals of the temperature sensor 168 and the comparison temperature sensor 170, and it can be checked whether the temperature difference or the value thereof lies within a predefined or predefinable normal range, such that it can be determined whether or not the jet behavior of the nozzle 123 lies in a normal range.

(32) It should be noted that the arrangements illustrated in the described exemplary embodiments are to be understood merely by way of example. For example, the at least one temperature sensor 168, alternatively or additionally to the embodiment illustrated in FIG. 3B, can also be mounted at different locations within the cleaning chamber 114. Alternatively or additionally to the nozzle shown in FIG. 3B, desired jet regions 166 of one or more other nozzles of the application device or of the application devices 336 of the cleaning appliance 110 can thus be monitored. As discussed above, it is particularly preferable however in this or other exemplary embodiments if, by way of example, one or more nozzles 123 that is/are known to be critical insofar as this nozzle/these nozzles often tends/tend towards becoming constricted, blocked or demonstrating other deviations from a normal jet behavior is/are monitored. By way of example, as discussed above, these critical nozzles 123 can be nozzles at the end of one or more pipes, for example at the end of the spray arms 125.

(33) If a deviation of a jet behavior of the at least one monitored nozzle 123 from a normal value or a normal behavior is determined, one or more of the specified actions can be executed, as discussed above, by the control unit 157, preferably automatically. By way of example, as discussed above, a warning can be output to a user. Alternatively or additionally, the operation of the cleaning appliance 110 can be stopped, and/or a transport speed of the transport device 314 can be changed. If, for example, it is determined that the jet behavior of the at least one nozzle 123 deviates from the normal behavior, yet a wetting with cleaning fluid 118 still takes place here in principle, a transport speed can be reduced for example, in order to ensure a sufficient cleaning and/or hygienization of the articles to be cleaned 116, at least in a time-based integration. Other actions are also conceivable.

LIST OF REFERENCE SIGNS

(34) 110 cleaning appliance 112 one-chamber dishwasher 114 cleaning chamber 116 articles to be cleaned 118 cleaning fluid 120 fluid device 122 rinse nozzle system 123 nozzles 124 secondary rinse nozzle system 125 spray arms 126 rack 128 door 130 rinse line 132 rinse pump 134 3-way valve 136 rinse tank 138 secondary rinse line 140 secondary rinse valve 142 secondary rinse pump 144 secondary rinse tank 146 fresh water feed line 148 drainage line 150 drainage pump 152 outflow 153 temperature-control device 154 heating element 156 further heating element 157 control unit 158 processor 160 data memory 162 user interface 164 data interface 166 desired jet region 168 temperature sensor 170 comparison temperature sensor 212 cleaning and disinfecting device 214 mount 216 siphon bend 218 nozzle system 220 line system 222 pump 224 tank 226 heating element 228 bypass 230 check valve 312 pass-through dishwasher 314 transport device 316 transport rack 318 transport direction 320 entry zone 322 discharge zone 324 pre-removal zone 326 wash zone 328 final rinse zone 330 drying zone 332 fan 334 rinse zone 336 application device 338 pre-removal nozzle system 340 pre-removal pump 342 pre-removal tank 344 wash zone nozzle system 346 wash zone pump 348 wash tank 350 pump final rinse section 352 fresh water final rinse section 354 pump final rinse section nozzle system 356 fresh water rinse section nozzle system 358 final rinse tank 360 final rinse pump 362 fresh water feed line 364 fresh water connection point 366 heating device 368 heat recovery device 370 separation curtains 372 feed valve