EP4477128A1 - Procédé de fonctionnement d'un lave-vaisselle industriel et lave-vaisselle - Google Patents

Procédé de fonctionnement d'un lave-vaisselle industriel et lave-vaisselle Download PDF

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Publication number
EP4477128A1
EP4477128A1 EP24178459.4A EP24178459A EP4477128A1 EP 4477128 A1 EP4477128 A1 EP 4477128A1 EP 24178459 A EP24178459 A EP 24178459A EP 4477128 A1 EP4477128 A1 EP 4477128A1
Authority
EP
European Patent Office
Prior art keywords
rinse
sprayed
liquid
phase
dishwasher
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP24178459.4A
Other languages
German (de)
English (en)
Inventor
Harald Disch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of EP4477128A1 publication Critical patent/EP4477128A1/fr
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
    • A47L15/0026—Rinsing phases
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
    • A47L15/0005—Rinsing phases, e.g. pre-rinsing, intermediate rinsing, final rinsing
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0047—Energy or water consumption, e.g. by saving energy or water
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/03—Operation mode, e.g. delicate washing, economy washing, reduced time, sterilizing, water softener regenerating, odor eliminating or service
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/04—Crockery or tableware details, e.g. material, quantity, condition
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/12—Water temperature
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve

Definitions

  • the present invention relates generally to the field of commercial dishwashing.
  • the invention relates to a method for operating a commercial dishwasher, which is designed in particular as a programmer or as a hood dishwasher, as well as a corresponding dishwasher.
  • the dishwasher according to the invention is designed in particular as a programmer or as a conveyor dishwasher and has a container for temporarily storing liquids, wherein the container has a liquid inlet which can be fluidly connected to a fresh water source if required, and a liquid outlet which can be fluidly connected to a consumer, in particular a consumer of the dishwasher, if required.
  • the container for temporarily storing liquids is in particular a fresh water container and/or a fresh water booster.
  • a dishwasher designed as a programmer usually has a treatment chamber for cleaning dishes.
  • a wash tank is arranged under the treatment chamber, in which liquid from the treatment chamber can flow back by gravity.
  • the wash tank contains washing liquid, which is usually water, to which cleaning agents can be added if necessary.
  • commercial dishwashers that are designed as programmers or hood-type dishwashers are characterized by the fact that, in order to treat (clean) the items to be washed in the treatment chamber of the dishwasher, a washing liquid is sprayed in the treatment chamber of the dishwasher during a washing phase, particularly in a recirculating manner. In the subsequent rinsing phase, a rinsing liquid is sprayed in the treatment chamber of the dishwasher.
  • the washing liquid sprayed in the treatment chamber during the washing phase flows back by gravity into a washing tank that is usually arranged below the treatment chamber of the dishwasher.
  • the temperature of the washing liquid is usually around 60°C. With the washing liquid, only the energy that is removed from the overall system due to the cleaning process must be reintroduced into the washing liquid, for example through energy input into the items being washed and/or through evaporation losses or heat release into the environment.
  • the rinse phase following the washing phase uses rinse liquid, which is usually fresh water to which a rinse aid chemical may have been added.
  • rinse liquid which is usually fresh water to which a rinse aid chemical may have been added.
  • the rinse liquid is heated to, for example, around 80°C using a rinse liquid heater (boiler).
  • the rinse aid liquid also flows into the washing tank of the dishwasher, which on the one hand regenerates the washing liquid and on the other hand introduces a certain amount of energy into the washing solution, since the temperature of the rinse aid liquid is usually higher than that of the washing liquid (washing solution) that is sprayed into the treatment chamber of the dishwasher during the washing phase.
  • the present invention is based on the object of specifying a method for operating a commercial dishwasher which is designed as a programmer or as a hood dishwasher, whereby with the aid of this method the energy consumption of the dishwasher during operation can be reduced without reducing the cleaning efficiency and in particular the rinsing efficiency of the dishwasher.
  • a corresponding dishwasher in particular a commercial dishwasher in the form of a programmer or in the form of a hood dishwasher, which can save energy during operation is to be specified.
  • the invention relates in particular to a method for operating a commercial dishwasher which is designed as a programmer or as a hood dishwasher is designed, wherein in the method a washing liquid is sprayed in a treatment chamber of the dishwasher during a washing phase, in particular in a recirculating manner, and wherein a rinsing liquid is sprayed in the treatment chamber of the dishwasher during a rinsing phase following the washing phase.
  • the method according to the invention is characterized in particular in that the final rinse phase is divided into a first final rinse phase and into at least one second final rinse phase, wherein in the final rinse phases the final rinse liquid is sprayed at different, in particular different average, final rinse liquid temperatures.
  • the method according to the invention provides that the rinse liquid sprayed in the final rinse phase in the treatment chamber of the dishwasher has a first, in particular average, minimum temperature during the first final rinse phase, which is higher than a particularly average temperature of the washing liquid sprayed in the treatment chamber of the dishwasher during the washing phase.
  • the rinse liquid sprayed in the treatment chamber of the dishwasher during the final rinse phase has a second, in particular average, temperature during the second final rinse phase, which is lower than the in particular average (first) temperature of the rinse liquid sprayed in the treatment chamber of the dishwasher during the first final rinse phase.
  • the present invention is based on the knowledge that when considering the total energy consumption of a dishwasher of the type considered here, a large proportion is usually required for heating the fresh water or for heating the rinse liquid for the rinse phase. With regard to optimizing the energy consumption of such a dishwasher, this means that the greatest potential for savings lies in reducing the amount of fresh water or rinse liquid, so that less fresh water or rinse liquid needs to be heated. On the other hand, however, the amount of fresh water or rinse liquid used for rinsing during a rinse phase cannot be reduced arbitrarily, since From a hygienic point of view, a perfect rinse result must always be guaranteed.
  • a reduction in energy consumption can be achieved by dividing the second process step in the treatment of wash ware, namely the rinsing phase, into at least two sub-steps, so that only a part of the total amount of fresh water or rinsing liquid required for a perfect rinsing result is heated to the aforementioned approximately 80°C, whereas the second part of the fresh water rinsing or rinsing is carried out at a reduced temperature which, from an energy point of view, is as close as possible to the desired washing temperature of, for example, approximately 60°C.
  • this additional final rinse break during the dripping phase between the first and second final rinse phases has the potential to reduce the total amount of fresh water that is required per cleaning cycle during the final rinse phase compared to the current standard processes while maintaining the same final rinse result.
  • the first rinse phase overlaps with the second rinse phase at least temporarily.
  • no dripping phase is provided and the water is continuously Rinse aid liquid is sprayed into the treatment chamber of the dishwasher, but initially at a first temperature (during the first rinse phase) and then at a second temperature (during the second rinse phase), whereby these two rinse phases gradually merge into one another with regard to the temperature of the rinse aid liquid.
  • the rinse liquid sprayed in the treatment chamber of the dishwasher during the final rinse phase to have a particularly average temperature during the second final rinse phase which is equal to or higher than a particularly predetermined or definable minimum temperature of the washing liquid sprayed or to be sprayed in the treatment chamber of the dishwasher during the washing phase.
  • the rinse liquid sprayed in the final rinse phase in the treatment chamber of the dishwasher has a particularly average temperature of 55°C to 90°C during the first final rinse phase, preferably a particularly average temperature of 65°C to 90°C, even more preferably a particularly average temperature of 75°C to 90°C and most preferably a particularly average temperature of 80°C to 85°C.
  • the rinse liquid sprayed in the final rinse phase in the treatment chamber of the dishwasher has a particularly average temperature of 50°C to 80°C, preferably a particularly average temperature of 55°C to 75°C, and even more preferably a particularly average temperature of 55°C to 65°C during the second final rinse phase.
  • washing liquid sprayed or to be sprayed in the treatment chamber of the dishwasher during the washing phase is particularly provided that this is heated compared to the ambient temperature of the dishwasher, in particular to a predetermined or definable minimum temperature of 50°C, preferably 55°C and even more preferably 60°C.
  • the discharged and in particular pumped-out washing liquid can be fed to a heat exchanger system in order to "recover" at least part of the kinetic energy of the discharged/pumped-out washing liquid and to use this recovered kinetic energy to heat up the rinse liquid to be sprayed in the rinse phase as required.
  • the amount of washing liquid to be drained from the washing tank of the dishwasher after the washing phase corresponds at least substantially to the amount of rinse aid liquid that is sprayed into the treatment chamber of the dishwasher in the rinse aid phase.
  • a temperature of the washing liquid regenerated with the final rinse liquid already sprayed in the final rinse phase is determined and in particular measured.
  • a temperature of the final rinse liquid to be sprayed and in particular still to be sprayed during the second final rinse phase is selected and in particular set (preferably set in a regulating manner) in such a way that at the end of the final rinse phase of a cleaning cycle at the latest, the temperature of the washing liquid regenerated with the final rinse liquid corresponds to a pre-determined or determinable washing liquid temperature of, for example, 60°C.
  • the pre-determined or determinable washing liquid temperature depends in particular on a cleaning program and also in particular on the type of items to be picked up and treated in the treatment chamber of the dishwasher during the cleaning cycle. As already stated, the pre-determined or determinable washing liquid temperature can also be lower than 60°C, for example 50°C or 55°C.
  • a predetermined or definable amount of rinse aid liquid is sprayed.
  • This predetermined or definable amount of rinse aid liquid sprayed or to be sprayed in the treatment chamber of the dishwasher during the rinse phase is - depending on the treatment program selected - approximately 1.5 to 2.5 liters and preferably approximately 2.0 liters.
  • other rinse aid liquid volumes are also conceivable here.
  • the total amount of rinse liquid to be sprayed in the treatment chamber of the dishwasher during the final rinse phase is divided into a first partial amount and a second partial amount.
  • the first partial amount is the proportion of the total amount of rinse liquid to be sprayed in the treatment chamber of the dishwasher during the final rinse phase that is to be sprayed or is sprayed in the treatment chamber of the dishwasher during the first final rinse phase.
  • the second partial amount is the proportion of the total amount of rinse liquid to be sprayed in the treatment chamber of the dishwasher during the final rinse phase that is to be sprayed or is sprayed in the treatment chamber of the dishwasher during the second final rinse phase.
  • the first and second partial quantities of the rinse liquid to be sprayed in the corresponding final rinse phase can be adjusted.
  • the first partial quantity of the rinse liquid to be sprayed or atomized in the first final rinse phase is different from the second partial quantity of the rinse liquid to be sprayed or atomized in the second final rinse phase.
  • the first partial amount of the rinse liquid to be sprayed or sprayed in the first rinse phase or the second partial amount of the rinse liquid to be sprayed or sprayed in the second rinse phase is adjustable and in particular variably adjustable, in particular depending on a selected washing program for the dishwasher and/or depending on a type of washware treated or to be treated in the treatment chamber of the dishwasher.
  • the first partial quantity of the rinse liquid to be sprayed or sprayed in the first rinse phase corresponds to 50% of the total quantity of rinse liquid to be sprayed during the rinse phase and the second partial quantity of the rinse liquid to be sprayed or sprayed in the second rinse phase corresponds to 50% of the total quantity of rinse liquid to be sprayed during the rinse phase if the following type of items are being or are to be treated in the treatment chamber: plates, bowls and/or small dishes made of porcelain or a porcelain-like material.
  • the first partial quantity of the rinse aid liquid to be sprayed or sprayed in the first rinse phase corresponds to 20% of the total quantity of rinse aid liquid to be sprayed during the rinse phase and the second partial quantity of the rinse aid liquid to be sprayed or sprayed in the second rinse phase corresponds to 80% of the total quantity of rinse aid liquid to be sprayed during the rinse phase if the following type of washware is or is to be treated in the treatment chamber: glasses, in particular drinking glasses or other washware items made of glass or a glass-like material.
  • the first partial quantity of the rinse aid liquid to be sprayed or sprayed in the first rinse phase corresponds to 70% of the total quantity of rinse aid liquid to be sprayed during the rinse phase and the second partial quantity of the rinse aid liquid to be sprayed or sprayed in the second rinse phase corresponds to 30% of the total quantity of rinse aid liquid to be sprayed during the rinse phase if the following type of washware is or is to be treated in the treatment chamber: utensils, cutlery, pots and/or pans.
  • the object underlying the invention is further achieved by the subject matter of the independent patent claim 14, which relates to a dishwasher, in particular a commercial dishwasher in the form of a programmer or in the form of a hood dishwasher.
  • the dishwasher according to the invention has a treatment chamber for receiving items to be cleaned, a washing system with at least one washing pump and washing nozzles, via which washing liquid is in the treatment chamber in a recirculating manner, a washing tank provided below the treatment chamber, in which at least a portion of the washing liquid sprayed via the washing nozzles of the washing system in the treatment chamber can be received, and a rinsing system with at least one rinsing pump and rinsing nozzles, via which rinsing liquid in the form of fresh water with a possibly added rinse aid can be sprayed in the treatment chamber during a rinsing phase.
  • the rinse aid system has a rinse aid liquid heater (boiler), via which the rinse aid liquid to be sprayed in the treatment chamber of the dishwasher during the rinse aid phase or the fresh water of the rinse aid liquid to be sprayed in the treatment chamber of the dishwasher during the rinse aid phase can be heated to a predetermined or definable temperature, in particular a minimum temperature, in particular optionally and/or as required.
  • a rinse aid liquid heater blower
  • the dishwasher according to the invention is characterized in particular in that the final rinse system is designed to spray the final rinse liquid at a first, in particular average, final rinse liquid temperature in a first final rinse phase of the final rinse phase and to spray the final rinse liquid at a second, in particular average, final rinse liquid temperature that is different from the first, in particular average, final rinse liquid temperature in a second final rinse phase of the final rinse phase.
  • the dishwasher according to the invention is provided with a control device which is designed to control the rinse aid system of the dishwasher for carrying out the aforementioned method according to the invention.
  • FIG. 1 is a hydraulic diagram of an exemplary embodiment of the dishwasher 1 according to the invention. It should be noted that - although the exemplary embodiment of the dishwasher 1 according to the invention is FIG. 1 in the form of a programmed automatic machine - the invention is not limited to dishwashers in the form of a programmed automatic machine.
  • the invention also relates to hood-type dishwashers and corresponding methods for operating such dishwashers.
  • the exemplary embodiment of the dishwasher 1 designed as a programmer according to FIG. 1 has a program control device 18 for controlling at least one cleaning program and a through a door (in FIG. 1 not shown) or a hood (also in FIG. 1 not shown) lockable treatment chamber 2 in a machine housing for receiving items to be cleaned (in FIG. 1 not shown), such as dishes, cutlery, pots, pans, trays and cooking utensils.
  • a washing tank 3 for collecting sprayed liquid from the treatment chamber 2.
  • a washing pump 4 is provided for conveying washing liquid from the washing tank 3 through a washing liquid line system 5 to washing nozzles 6, which are directed in the treatment chamber 2 towards the area of the items to be cleaned and spray the washing liquid onto the items to be cleaned, particularly during a washing phase.
  • the sprayed washing liquid falls back into the washing tank 3 by gravity.
  • the washing tank 3, the washing pump 4, the washing liquid line system 5, the washing nozzles 6 together with the treatment chamber 2 thus form a washing liquid circuit.
  • the washing liquid line system 5 connects the pressure side of the washing pump 4 to the corresponding washing nozzles 6.
  • a rinse system for conveying rinse liquid by means of a rinse pump 7 through a rinse liquid line system 8 to rinse nozzles 9 are provided, which are directed in the treatment chamber 2 towards the area of the items to be cleaned.
  • the rinse liquid sprayed during a rinse phase falls by gravity from the treatment chamber 2 into the wash tank 3.
  • the rinse liquid line system 8 connects the pressure side of the rinse pump 7 with the rinse nozzles 9.
  • a plurality of washing nozzles 6 are provided on at least one upper washing arm, a plurality of washing nozzles 6 on at least one lower washing arm, a plurality of rinsing nozzles 9 on at least one upper rinsing arm and a plurality of rinsing nozzles 9 on at least one lower rinsing arm.
  • a quantity of washing liquid corresponding to the rinse liquid is pumped out of the washing tank 3 by means of a drain pump 10, the suction side of which is connected to a sump of the washing tank 3 via a drain line.
  • the wash tank 3 is empty before the first start of the dishwasher 1, which is designed as a programmer, for example, it must first be filled with fresh water via a fresh water line 12 or by means of the rinse aid system and its rinse aid pump 7 with fresh water or another rinse aid liquid or washing liquid.
  • the rinse aid liquid can be fresh water or fresh water mixed with rinse aid.
  • the washing liquid contains detergent, which is added to the liquid contained in the wash tank 3 by a detergent dosing device (in FIG. 1 not shown) is preferably added automatically.
  • the program control device 18 controls the wash pump 4, the rinse pump 7, the drain pump 10 and a detergent solution pump (in FIG. 1 not shown) depending on the cleaning program selected by an operator on the program control device 18. At least one cleaning program is provided, preferably several optionally selectable cleaning programs are provided.
  • the rinse pump 7 is connected on the suction side to a boiler (rinse liquid heater 11).
  • the boiler 11 also has an inlet connected to a fresh water supply line 14, via which either fresh water or fresh water with added rinse aid is supplied to the boiler 11.
  • the liquid supplied via the inlet pure fresh water or fresh water with added rinse aid
  • the inlet is heated up according to the specification of a process sequence.
  • the rinse aid liquid heated in the boiler 11 can be supplied to the rinse aid nozzles 9 via the rinse aid pump 7, which has its suction side connected to the boiler outlet, for example during a fresh water rinse phase, via the rinse aid liquid line system 8.
  • the rinse aid nozzles 9 are arranged in the treatment chamber 2 of the dishwasher 1 in order to spray the rinse aid liquid heated by the boiler 11 onto the items to be washed in the treatment chamber 2.
  • the exemplary embodiment of the dishwasher 1 according to the invention can also be assigned a fresh water tank without heating in addition to or as an alternative to the boiler 11.
  • This fresh water tank preferably has an inlet which is connected to a fresh water supply line, via which pure fresh water or fresh water with added rinse aid is fed back to the fresh water tank.
  • the boiler 11 is connected to a backflow preventer 13 via at least one fresh water supply line 14.
  • the backflow preventer 13 serves to prevent fresh water from being sucked back into a fresh water supply line 12 from the suction side of the rinse pump 7.
  • the water flow within the FIG. 1 The function of the dishwasher 1 shown schematically is as follows: the fresh water enters the boiler 11 via a filling valve 15 and the backflow preventer 13. If necessary, the fresh water is heated there by the heater 16. The liquid level in the boiler 11 can be detected by a pressure sensor 17. The fresh water heated in the boiler 11, if necessary, is pumped into the treatment chamber 2 of the dishwasher 1 via the rinse pump 7 and the rinse nozzles 9. The fresh water sprayed in the treatment chamber 2 collects in the wash tank 3. A heater 16 is preferably provided in the wash tank 3 in order to keep the liquid collected in the wash tank 3 at the right temperature. The liquid level in the wash tank 3 can be detected by a pressure sensor 17. After a washing phase, part of the liquid collected in the washing tank 3 (washing liquid) is pumped out of the dishwasher 1 into a drain by the drain pump 10. This pumped-out washing liquid is replaced by fresh water or liquid from the boiler 11.
  • the dishwasher 1 according to the invention is characterized in particular by the fact that in a cleaning cycle of the dishwasher 1, the final rinse phase, during which final rinse liquid is sprayed onto the items to be washed in the treatment chamber 2 of the dishwasher 1, is divided into a first final rinse phase and a second final rinse phase.
  • the final rinse liquid or the fresh water is sprayed onto the items to be washed at a first, in particular average, final rinse liquid temperature
  • the final rinse liquid is sprayed onto the items to be washed in the treatment chamber 2 of the dishwasher 1 at a second, in particular average, final rinse liquid temperature that is different from the first, in particular average, final rinse liquid temperature.
  • the rinse aid liquid sprayed in the treatment chamber 2 of the dishwasher 1 has a first, in particular average, temperature during the first rinse phase, which is higher than a particularly average temperature of the washing liquid sprayed in the treatment chamber 2 of the dishwasher 1 during the washing phase.
  • the rinse liquid sprayed in the treatment chamber 2 of the dishwasher 1 during the final rinse phase has a second, in particular average, temperature during the second final rinse phase, which is lower than the in particular average temperature of the rinse liquid sprayed in the treatment chamber 2 of the dishwasher 1 during the first final rinse phase.
  • the invention is not limited to the FIG. 1 shown exemplary embodiment of the dishwasher 1 according to the invention, but results from a synopsis of all features disclosed herein.
  • the inventive concept can be seen in the fact that the process step of rinsing and in particular fresh water rinsing is divided into at least two sub-process steps.
  • the fresh water rinsing takes place as usual at a temperature of approx. 80°C, by heating the fresh water required for this to this temperature in advance in the boiler 11.
  • the amount of fresh water used for this first sub-process step is, for example, 50% of the total amount of fresh water required for a perfect rinsing result.
  • the amount of fresh water used for the first sub-process step can also make up a larger or smaller proportion of the total amount.
  • the second sub-process step is then carried out at a reduced temperature at the level of the washing liquid temperature.
  • this part of the fresh water no longer has to be heated in the boiler 11 to, for example, 80°C, but only to a lower temperature of usually around 60°C.
  • the first sub-process step ie the first final rinse phase
  • the fresh water used for the final rinse is heated in the boiler 11 to, for example, 80°C and then, after the washing phase has been completed, sprayed onto the items to be cleaned and rinsed via the final rinse nozzles 9.
  • the amount of rinse liquid used in the first partial process step is smaller than the amount of liquid required in the conventional approach for the rinse phase as a whole. For example, during the first rinse phase, only 1 liter (50%) is sprayed into the treatment chamber 2 of the dishwasher 1 instead of the previously usual 2 liters.
  • the second final rinse phase begins.
  • the boiler 11 is refilled with cold fresh water, for example with 1 liter, so that the boiler 11 has the same fill level as at the start of the first sub-process step, i.e. at the start of the first final rinse phase.
  • this does not first heat up to 80°C as has been the case up to now, but in combination with any fresh water remaining in the boiler 11 that has already been heated to 80°C, a mixed temperature of approx. 60°C is established in the boiler 11.
  • This fresh water with a mixed temperature of approx. 60°C is then used directly for the second final rinse phase, i.e. for the second sub-process step of the final rinse phase.
  • the second final rinse phase takes place with, for example, 1 liter of fresh water, which, however, only has a temperature of approx. 60°C instead of 80°C.
  • the total amount of rinse liquid is therefore still 2 liters per cleaning cycle, which means that a perfect rinsing result can still be guaranteed.
  • 1 liter (50%) needs to be heated to the final rinse temperature of 80°C, which means that significant energy savings can be achieved while maintaining the same rinsing result.
  • Another aspect that is added to this process sequence according to the invention is the possibility of providing a drip break between the first final rinse phase and the second final rinse phase.
  • the fresh water or the final rinse liquid that was sprayed onto the items to be washed in the first final rinse phase can neutralize the wash liquor to be rinsed off and run off/drip off the items to be washed.
  • This additional drip time means that a large part of the wash liquor (washing liquid) can be rinsed off and neutralized from the items to be washed in the first final rinse phase before the final rinse is carried out in the second final rinse phase.
  • this additional final rinse break has the potential to reduce the total amount of final rinse liquid per cleaning cycle compared to the current usual process while maintaining the same final rinse result.

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EP24178459.4A 2023-06-15 2024-05-28 Procédé de fonctionnement d'un lave-vaisselle industriel et lave-vaisselle Pending EP4477128A1 (fr)

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DE102023115612.8A DE102023115612A1 (de) 2023-06-15 2023-06-15 Verfahren zum betreiben einer gewerblichen spülmaschine sowie gewerbliche spülmaschine

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EP24178459.4A Pending EP4477128A1 (fr) 2023-06-15 2024-05-28 Procédé de fonctionnement d'un lave-vaisselle industriel et lave-vaisselle

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1723887A2 (fr) * 2005-05-20 2006-11-22 Premark FEG L.L.C. Lave-vaisselle commerciel, particulièrement machine à laver la verrerie
US20100043828A1 (en) * 2008-08-21 2010-02-25 Yong Jin Choi Diswasher and controlling method of the same
DE102008043573A1 (de) * 2008-11-07 2010-05-12 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben einer Geschirrspülmaschine
US20110017235A1 (en) * 2008-04-07 2011-01-27 Premark Feg L.L.C. Dishwasher and method for cleaning wash ware
US9538897B2 (en) * 2008-09-23 2017-01-10 Meiko Maschinenbau Gmbh & Co. Kg Dishwasher with low-temperature final washing

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
DE102011077660A1 (de) * 2011-06-16 2012-12-20 Meiko Maschinenbau Gmbh & Co. Kg Reinigungsvorrichtung mit Energiespeicher
DE102012207565B4 (de) * 2012-05-07 2024-06-13 Premark Feg L.L.C. Verfahren zum Betreiben einer als Programmautomat ausgebildeten Spülmaschine sowie entsprechende Spülmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1723887A2 (fr) * 2005-05-20 2006-11-22 Premark FEG L.L.C. Lave-vaisselle commerciel, particulièrement machine à laver la verrerie
US20110017235A1 (en) * 2008-04-07 2011-01-27 Premark Feg L.L.C. Dishwasher and method for cleaning wash ware
US20100043828A1 (en) * 2008-08-21 2010-02-25 Yong Jin Choi Diswasher and controlling method of the same
US9538897B2 (en) * 2008-09-23 2017-01-10 Meiko Maschinenbau Gmbh & Co. Kg Dishwasher with low-temperature final washing
DE102008043573A1 (de) * 2008-11-07 2010-05-12 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben einer Geschirrspülmaschine

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