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EP4373378B1 - Lave-vaisselle domestique doté d'un système de séchage par sorption et procédé associé pour exécuter un programme de lavage de vaisselle à économie d'énergie - Google Patents

Lave-vaisselle domestique doté d'un système de séchage par sorption et procédé associé pour exécuter un programme de lavage de vaisselle à économie d'énergie Download PDF

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Publication number
EP4373378B1
EP4373378B1 EP22740878.8A EP22740878A EP4373378B1 EP 4373378 B1 EP4373378 B1 EP 4373378B1 EP 22740878 A EP22740878 A EP 22740878A EP 4373378 B1 EP4373378 B1 EP 4373378B1
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EP
European Patent Office
Prior art keywords
regeneration
dishwasher
phase
air
sorption material
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EP22740878.8A
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German (de)
English (en)
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EP4373378A2 (fr
Inventor
Andreas Reiter
Klaus Steinle
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication of EP4373378A2 publication Critical patent/EP4373378A2/fr
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    • 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
    • A47L15/0042—Desorption phases of reversibly dehydrogenated drying material, e.g. zeolite in a sorption drying system
    • 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
    • A47L15/42—Details
    • A47L15/48—Drying arrangements
    • A47L15/481—Drying arrangements by using water absorbent materials, e.g. Zeolith
    • 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
    • A47L2401/20—Time, e.g. elapsed operating time
    • 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
    • A47L2501/10—Air circulation, e.g. air intake or venting arrangements
    • 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
    • A47L2501/11—Air heaters
    • 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
    • A47L2501/12—Air blowers
    • 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
    • A47L2501/30—Regulation of machine operational steps within the washing process, e.g. performing an additional rinsing phase, shortening or stopping of the drying phase, washing at decreased noise operation conditions

Definitions

  • the desorption heating device heats the washroom air, which is forcibly fed to this sorption material by means of the air conveying unit, at least temporarily during the regeneration phase, with a fixed or constant heating output using electrical energy.
  • It is preferably designed as an electric air heater, which is provided in the recirculating air duct, viewed in the forced air flow direction of the air conveying unit, upstream of the inlet cross-sectional area of the fixed bed housed in the sorption container. It thus heats the washroom air, which is forcibly fed by the air conveying unit during the respective regeneration phase, upstream of its entry into the fixed bed, viewed in the direction of flow.
  • a household dishwasher of the type mentioned above is known, for example, from WO 2015/003933 A1
  • a control unit increases the speed of a fan provided in the recirculation duct of its drying system when the temperature in the drying system's container containing a super absorbent polymer reaches the upper limit of the regeneration temperature of this super absorbent polymer, as specified by the drying material manufacturer, in order to prevent it from overheating.
  • the DE 10 2013 101 673 A1 specifies a method for operating a dishwasher having a sorption drying device, in which a desorption process of the sorption drying device suitable for releasing moisture is carried out depending on a selected cleaning program.
  • the amount of heat supplied to the sorption drying device during the desorption process is selected depending on the selected cleaning program. For this purpose, the amount of heat supplied is adjusted by specifying the duration and/or the supplied power.
  • the sorption drying system of the dishwasher DE 10 2014 222 539 A1 In recirculation mode, air is drawn from the wash tub by a fan through a sorption drying device and then back into the wash tub.
  • the volume flow that can be fed back into the wash tub via an outlet opening or the exit velocity of the air that has passed through the sorption drying device is varied several times. The same can also be done during a desorption phase, during which a heating device provided upstream of and/or within the sorption drying device heats the air conveyed by the fan and/or the sorption material of the sorption drying device.
  • the DE 10 2013 213 359 B3 deals specifically with a commercial dishwasher designed as a programmable automatic dishwasher, which comprises a sorption unit in a recirculation duct and a fan arranged in front of it.
  • a commercial dishwasher designed as a programmable automatic dishwasher, which comprises a sorption unit in a recirculation duct and a fan arranged in front of it.
  • air from the washing container is blown through the sorption unit by the fan, and thermal energy is supplied to the dry material by means of a heating device.
  • the DE 10 2012 000 013 A1 envisages a household dishwasher with a recirculation duct containing a sorber and a fan arranged upstream of it.
  • the sorbent of the sorber which is partially laden with water, is heated for desorption by direct, static heat supply (static desorption) without forced air movement.
  • the sorbent is in direct contact with heating surfaces, which heat the sorbent during static desorption.
  • the heating surfaces are embedded and not electrically insulated from the sorbent.
  • a post-ventilation follows, during which circulating air forced through the sorbent by the fan desorbs further water vapor from the sorbent.
  • the invention is based on the object of further improving the energy efficiency of a household dishwasher with a sorption drying system of the type mentioned above.
  • a control logic for the regeneration phase of the respective dishwashing program changes the conveying volume flow of the wash cabinet air conveyed by the air conveying unit in a specific dependency on the respectively specified regeneration time duration of the regeneration phase of the respective dishwashing program in such a way that the inlet temperature of the wash cabinet air conveyed into the fixed bed during the regeneration phase of the respective dishwashing program and heated by means of the desorption heating device and thus the regeneration temperature brought about in the sorption material over the flow extension of the fixed bed is set in a specific dependency on the respectively specified regeneration time duration of the regeneration phase of the respective dishwashing program.
  • the control logic therefore adapts the volume flow of the wash cabinet air conveyed by the air conveying unit individually or specifically to the respective specified duration of the regeneration phase of the respective dishwashing program.
  • the control/monitoring unit provides several different dishwashing programs, such as an energy-saving dishwashing program, in particular a so-called eco-dishwashing program, a so-called auto-dishwashing program, in which in particular the degree of soiling of the dishwashing liquid when rinsing the dishes to be cleaned is determined preferably by means of at least one sensor such as a turbidity sensor and is used for the automatic setting of at least one rinsing parameter and/or drying parameter, a quick program, an intensive cleaning program (in particular with an increased temperature during its cleaning phase), a night-time cleaning program, a special program for washing glasses, etc., which differ from one another in that their regeneration phases have different lengths, the control logic assigns different delivery volume flows or throughput rates, i.e.
  • the control logic adjusts the volume flow of the wash cabinet air conveyed by the air conveying unit for the regeneration phase if the respective selected dishwashing program exceeds the duration of its regeneration phase changed, i.e. extended or shortened.
  • the dishwashing program currently being carried out can shorten its regeneration phase if, during the previous dishwashing program, the dishwasher's wash cabinet was only partially loaded with dishes, so that after the last partial wash phase of this previous dishwashing program, the sorption material of the sorption drying system had to absorb a smaller total amount of water during its drying phase than when the wash cabinet was fully loaded.
  • the sorption material of the fixed bed can be regenerated in a more energy-saving or energy-efficient manner than if the air conveying unit were to convey the wash cabinet air with one and the same, i.e. always the same, conveying volume flow value for the different regeneration phases of the various dishwashing programs.
  • the household dishwasher according to the invention preferably switches to different desorption operating modes for the respective regeneration of the sorption material of the fixed bed:
  • the various dishwashing programs differ from one another in terms of the different lengths of their regeneration phases and the specifically assigned, different inlet temperatures of the dishwashing chamber air heated by the desorption heating device.
  • the air is conveyed into the fixed bed via its inlet cross-sectional area by means of the switched-on air conveying unit and flows through the fixed bed along its bed height in the flow direction.
  • the heating time preferably corresponds to the duration of the regeneration phase. If necessary, it can even be shorter than this.
  • the heating time can be shortened compared to the duration of the regeneration phase towards the end of the regeneration phase by a remaining time that is fixed for all dishwashing programs, i.e., always the same, during which the desorption heating device is already switched off and only wash cabinet air is circulated through the recirculation duct of the sorption drying system by means of the air conveying unit.
  • the control/monitoring unit of the household dishwasher according to the invention provides dishwashing programs with regeneration phases that vary in energy consumption.
  • An electric heater particularly an air heater, with a fixed or constant (output) heating output is preferably sufficient as the desorption heating device for desorbing the sorption material.
  • This heater heats the washroom air, which is forced through the recirculation duct by the air conveying unit, before it enters the fixed bed, as viewed in the direction of flow.
  • a more complex and controllable electric heater with regard to its thermal output is therefore not required for desorbing the sorption material.
  • the regeneration temperature achieved in the sorption material can be varied in specific dependence on the respective predefined regeneration time period or target regeneration time period of the regeneration phase of the respective dishwashing program, with a fixed or constant heating output of the heating device provided for the desorption of the sorption material, which delivers this to the air forcibly conveyed by the air conveying unit during the regeneration phase of the respective dishwashing program.
  • the conveyed volume flow indicates the volume of air that is moved, i.e. transported, by the air conveying unit through the recirculation duct and thus through the fixed bed of loose, granular or granular, reversibly dehydratable sorption material per period of time.
  • the air conveying unit is a fan or blower, the speed of which the control logic adjusts specifically depending on the respective predetermined duration of the regeneration phase of the respective dishwashing program.
  • the control logic adjusts the speed of the impeller of the fan or blower individually for the respective predetermined regeneration period of the regeneration phase of the respective dishwashing program such that the conveying volume flow of the forced-conveyed air generated by the fan during the respective regeneration period of the regeneration phase of the respective dishwashing program, which is at least temporarily subjected to the fixed or constant heating power of the desorption heating device during the respective regeneration period of the regeneration phase of the respective dishwashing program, effects a regeneration temperature in the fixed bed of the sorption material that is specifically tailored to the respective regeneration period of the regeneration phase of the respective dishwashing program.
  • the control logic assigns different volumetric flow rates of the wash cabinet air to these programs, which are generated by different fan speeds. With regard to a single dishwashing program, in which the duration of its regeneration period is varied, this changed period is adjusted in an analogous manner.
  • the control logic specifically assigns a changed volume flow of the wash cabinet air based on a correspondingly changed speed of the fan.
  • the control logic When carrying out the regeneration phases of different lengths of the various dishwashing programs provided by the control/monitoring unit or a dishwashing program to be carried out, the control logic does not simply set the conveying volume flow of the air conveying unit to a fixed value in such a way that the same target regeneration temperature equal to or above a limit temperature is always achieved for the regeneration of the loose sorption material of the fixed bed, which leads to the extensive or almost complete expulsion of the water bound in the sorption material, but now makes a distinction as to how high the regeneration temperature achieved in the sorption material should be in specific dependence on the respectively specified regeneration time duration of the regeneration phase of the respective dishwashing program.
  • the control logic is therefore not based on always achieving the same target regeneration temperature equal to or above a limit temperature that leads to the extensive or almost complete expulsion of the water bound in the sorption material by the end of the regeneration phase of the respective dishwashing program.
  • the control logic changes the conveying volume flow of the air conveying unit and, with a fixed or constant heating output of the desorption heating device provided for desorption, the regeneration temperature achieved in the sorption material in a specific or individual manner depending on the length or duration of the regeneration phase of the respective dishwashing program.
  • the thermal energy expenditure for the regeneration of the sorption material can thus be specifically or individually adapted to the respective regeneration time duration of the regeneration phase of the respective dishwashing program.
  • control logic can adjust the flow rate of the air conveying unit for the regeneration phase of at least one energy-saving dishwashing program to be carried out in such a way that the regeneration temperature achieved in the sorption material is lower or lower than the limit regeneration temperature from which the sorption material would largely or almost entirely desorb the water adsorbed by it during the sorption drying phase of a preceding dishwashing program.
  • the amount of water stored in the sorption material during the sorption drying phase of the previous dishwashing program is not desorbed completely, but only predominantly until a desired minimum residual moisture amount or target residual moisture amount of water remains (which is greater than the minimum remaining residual moisture in the sorption material when desorbing at the limit regeneration temperature), which is more energy efficient, i.e. requires less thermal energy, than if the sorption material were heated at least to the limit regeneration temperature, from which the sorption material would desorb almost all of the water it has adsorbed.
  • the control/monitoring unit of the household dishwasher according to the invention thus provides, in particular, at least one energy-saving dishwashing program, during the execution of which the household dishwasher according to the invention is operated in a more energy-efficient operating mode than in other dishwashing programs provided by its control/monitoring unit.
  • the control logic preferably changes the conveying volume flow of the air conveying unit for the regeneration phase such that the regeneration temperature brought about in the sorption material is lower than the minimum regeneration temperature limit required for almost complete desorption, so that a desired minimum residual moisture or target residual moisture content of water remains adsorbed by the sorption material, which is now deliberately increased compared to the minimum residual moisture amount adsorbed by the sorption material at the regeneration temperature limit.
  • the expulsion of this increased minimum residual moisture from the sorption material would require a disproportionately high expenditure of thermal energy, which would be provided by the desorption heating device by A corresponding amount of electrical energy would be required to convert it into thermal energy.
  • the desorption heating device heats the wash chamber air, which is forced onto the sorption material by the air conveying unit, during the regeneration phase using electrical energy.
  • the air conveying unit running during the regeneration phase allows only a portion of the thermal energy generated by the desorption heating device to be introduced into the wash chamber of the domestic dishwasher's washing container during at least one wash phase, in particular the cleaning phase, of the wash program following the sorption drying cycle of the respective wash program being performed, and to contribute to heating the wash chamber or the wash liquid introduced there.
  • the control/monitoring unit of the household dishwasher according to the invention provides several Dishwashing programs are available with different regeneration phases.
  • an intensive cleaning program can have a regeneration time of 20-35 minutes for desorbing the sorption material
  • the desorption heating device intended for regenerating the sorption material is designed as an electric air heater, which is provided in the recirculating air duct upstream of the fixed bed of sorption material housed in the sorption container, as viewed in the direction of forced air flow. Because the air flowing through the fixed bed of loose, granular, or reversibly dehydratable sorption material is heated upstream of the fixed bed by the electric air heater before entering the fixed bed, it is largely ensured that the air flows into the fixed bed at a defined heating temperature.
  • thermal energy or heat energy can be supplied to the grains or granules of the sorption material in a largely uniform manner and can be released to them in a largely uniform manner.
  • control logic which sets the conveying volume flow of the air conveying unit for the regeneration phase of the respective dishwashing program is a component of the control/monitoring unit which is provided for the execution of the one or more dishwashing programs.
  • the control/monitoring unit and/or the control logic are preferably implemented by one or more hardware components, which in particular comprise a microcomputer system with an electronic storage system, and/or by software components which are stored in at least one electronic memory of a computer, in particular a microcomputer system, of the household dishwasher according to the invention, and which control the sequence procedure, i.e. sequence of one or more rinsing steps or rinsing phases and the final drying step of the respective Dishwashing program.
  • the control logic can be a program part or a subroutine of the sequence procedure of the respective dishwashing program to be executed.
  • the control/monitoring unit provides at least one energy-saving dishwashing program, during the execution of which by the control/monitoring unit, the control logic shortens the duration of the regeneration phase compared to the duration of the regeneration phase of at least one other selectable dishwashing program and simultaneously increases the conveying volume flow of the air conveying unit during the regeneration phase of the energy-saving dishwashing program compared to the conveying volume flow of the air conveying unit specifically assigned to the other dishwashing program.
  • the regeneration temperature induced in the sorption material is reduced to a reduction regeneration temperature that is lower than the regeneration temperature induced in the other selectable dishwashing program.
  • the reduction regeneration temperature is in particular lower than the limit regeneration temperature above which the sorption material would almost completely desorb all of the water adsorbed by it during the drying phase of the preceding dishwashing program during the predetermined regeneration period.
  • the limit regeneration temperature for zeolite(s), especially zeolite(s) of type A, type Y, and/or type 13X, as sorption material is approximately 280° C (Celsius).
  • control logic when carrying out the energy-saving dishwashing program, shortens the duration of the regeneration phase compared to the duration of the regeneration phase of the other selectable dishwashing program to a short regeneration period and simultaneously increases the conveying volume flow of the air conveying unit during the regeneration phase of the energy-saving dishwashing program compared to the conveying volume flow of the air conveying unit specifically assigned to the regeneration phase of the other dishwashing program in such a way that the regeneration temperature caused in the flow inlet side region of the fixed bed in the sorption material is reduced to a reduction regeneration temperature which is lower than the regeneration temperature brought about in the sorption material in the flow inlet-side region of the fixed bed in the other selectable dishwashing program, and the regeneration temperature brought about in the sorption material in a fluidically downstream region of the fixed bed, in particular the region associated with the air outlet or flow outlet of the fixed bed, is increased to an increase regeneration temperature which is greater than the regeneration temperature brought about in the sorption material in the fluidically downstream region of
  • the inlet temperature of the air stream conveyed into the fixed bed is lowered—in particular by increasing the speed of the air conveying unit, which is preferably designed as a fan—a somewhat smaller amount of water is expelled from the sorption material SM along a first inlet-side section of the fixed bed.
  • the expulsion of water from the sorption material in the subsequent section of the fixed bed, particularly the outlet-side section is now more successful than in the case of an air stream with a higher inlet temperature.
  • the detachment of adsorbed water is specifically limited to those adsorption loading sites or binding sites of the sorption material with weaker adsorption binding energies.
  • the inlet temperature of the wash cabinet air conveyed into the fixed bed may be advantageous to set the inlet temperature of the wash cabinet air conveyed into the fixed bed (by correspondingly increasing the air flow rate of the air conveying unit) lower the shorter the duration of the regeneration phase of the respective dishwashing program, especially the energy-saving dishwashing program.
  • the shorter the duration of the regeneration phase with a fixed heating output of the desorption heating device the lower the thermal energy required to be provided by the desorption heating device.
  • control logic sets the short regeneration period for the regeneration phase of the energy-saving dishwashing program to be less than or equal to 15 minutes, in particular between 5 minutes and 15 minutes, and simultaneously or additionally increases the conveying volume flow of the air conveying unit during the regeneration phase of the energy-saving dishwashing program in such a way that during this short regeneration period of the regeneration phase, in the flow inlet-side region of the fixed bed in the sorption material, a reduction regeneration temperature (lower than the limit regeneration temperature) of at least 120°C and at most 200°C, in particular of at least 120°C and at most 150°C, is effected.
  • desorption heating device with the same or constant electrical power and the associated constant thermal output for the different lengths of regeneration phases of different dishwashing programs, but to reduce the running time of its regeneration phase for at least one more energy-efficient dishwashing program, in particular an energy-saving dishwashing program, compared to the running times of the regeneration phases of one or more other, less energy-efficient dishwashing programs.
  • a regeneration temperature that is reduced or lower than the regeneration temperatures of one or more other, less energy-efficient dishwashing programs, in particular between 120°C and a maximum of 200°C, in particular between 120°C and a maximum of 150°C, preferably for the zeolite types specified above, is sufficient for the implementation of the regeneration phase of the energy-saving dishwashing program in order to To be able to expel a sufficient portion of the water adsorbed during the sorption drying cycle of the preceding dishwashing program to dry the wash ware from the sorption material down to a minimum residual moisture content, which is now deliberately increased compared to the minimum residual moisture content adsorbed by the sorption material at the limit regeneration temperature.
  • This desired reduction in the regeneration temperature in the sorption material of the fixed bed during the shortened regeneration phase of the energy-saving dishwashing program is achieved by the air conveying unit correspondingly increasing the volume flow of the wash chamber air through the fixed bed.
  • control/monitoring unit therefore provides, when viewed in summary, at least one energy-saving dishwashing program, during the execution of which the control logic operates the air conveying unit with a modified conveying volume flow in order to reduce the regeneration temperature achieved in the sorption material during the regeneration phase, which is higher than the conveying volume flow of the air conveying unit during the regeneration phases of the one or more other, less energy-efficient dishwashing programs.
  • a fan or blower is provided as the air conveying unit.
  • the regeneration temperature in the sorption material can be reduced. This temperature is caused by the forced-feed washroom air heated by the desorption heating device.
  • the fixed bed is accommodated and aligned in the sorption container in such a way that the forced air flow generated by the air conveying unit during the regeneration phase and drying phase of the respective dishwashing program flows through it in a vertical direction against the direction of gravity.
  • the fixed bed is preferably formed by a bed of loose grains or granulate pieces of a sorption material, which is held in particular between a lower sieve grid and an upper sieve grid.
  • the loose grains or granulate pieces of the sorption material are spherical.
  • the control/monitoring unit provides at least one energy-saving dishwashing program, during the execution of which the control logic for reducing the inlet temperature of the dishwashing chamber air heated by means of the desorption heating device, which is conveyed into the fixed bed during the regeneration phase of the energy-saving dishwashing program by means of the air conveying unit, and thus the regeneration temperature brought about in the sorption material during the regeneration phase, the conveying volume flow of the air conveying unit in such a way (in comparison to one or more less energy-efficient, other dishwashing programs) increases that the sorption material of the fixed bed is only brought to a regeneration temperature during the respective specified regeneration period of the regeneration phase at which a specifically increased minimum residual moisture content of between 5% and 15%, in particular between about 10% and 15%, based on the dry mass of the sorption material remains in it.
  • this preferably requires a regeneration temperature between 120° C and 200° C, preferably between 150° C and 170° C, with a regeneration time of between 5 and 15 minutes.
  • the control logic ensures that the regeneration temperature brought about in the sorption material during the respective specified duration of the regeneration phase only releases water from those adsorption binding sites of the sorption material that require a lower average regeneration energy compared to those adsorption binding sites of the sorption material for which a disproportionately higher regeneration energy per adsorption volume, i.e. volume of adsorbed water per dry mass of sorption material, is required.
  • regeneration is limited to the removal of adsorbed water only from the adsorption loading sites of the sorption material with lower adsorption binding energy.
  • the adsorption loading sites of the sorption material with higher adsorption binding energy are deliberately no longer used. This improves the energy efficiency during desorption or regeneration.
  • those adsorption bonds which bind water molecules disproportionately more strongly than the other adsorption bonds of the sorption material are responsible for a residual moisture content of between 5% and 15% in the sorption material, in particular zeolite material, preferably of type A, type Y, and/or type 13X, by not dissolving, i.e. maintaining these strong adsorption bonds, a disproportionately high thermal energy expenditure required for their dissolution and, associated with this, a correspondingly disproportionately high amount of electrical energy for operating the desorption heating device, in particular electrical desorption heating device, can be saved.
  • the targeted restriction of the regeneration to these weaker adsorption binding sites means that the expenditure of thermal regeneration energy required for this is preferably between 10% and 30% lower than the total expenditure of thermal regeneration energy that would be required for the complete desorption of the water molecules from all, i.e.
  • the amount of water expelled from the sorption material from the adsorption binding sites with weak binding energy is sufficiently large so that the sorption material is sufficiently desorbed for the drying phase that concludes the wash program in order to be able to adsorb the amount of moisture present on the washware items after the last liquid-carrying partial wash phase, in particular the final rinse phase, by the warm, moist washroom air that is forcibly conveyed through the fixed bed of the sorption material by means of the air conveying unit.
  • the amount of water that can be expelled from the sorption material from the adsorption binding sites with weak binding energy corresponds to between 40% and 80% of the total amount of water that can be expelled with almost complete desorption.
  • the invention also relates to a method according to claim 12.
  • Figure 1 shows a schematic representation of an exemplary household dishwasher GS with a sorption drying system SY, whose sorption material is regenerated according to the inventive principle during the execution of one or more dishwashing programs, in particular at least one energy-saving dishwashing program.
  • Figure 1 Only those components of the GS household dishwasher that are necessary for understanding the invention are provided with reference numerals and explained. It goes without saying that the GS household dishwasher may include additional parts and assemblies.
  • the domestic dishwasher GS has a wash chamber SR for accommodating items to be cleaned.
  • the wash chamber SR is delimited by the walls of an approximately cuboid-shaped wash tub SB and a door, in particular a front door, which closes the loading opening, in particular the front-facing one. This is shown in the schematic front view of the Figure 1 omitted for the sake of simplicity of the drawing.
  • the boundary walls of the washing container SB are for an operator standing in front of the household dishwasher GS for its intended use, in particular a left-hand side wall, a right-hand side wall, a top wall, a Floor wall and a rear wall.
  • one or more storage units are provided for the items to be cleaned, in particular a lower crockery basket, an upper crockery basket, and/or a cutlery drawer, preferably arranged above the upper crockery basket.
  • a lower crockery basket preferably arranged above the upper crockery basket.
  • a cutlery drawer preferably arranged above the upper crockery basket.
  • the latter is not shown in the drawing for the sake of clarity or for reasons of space.
  • Figure 1 omitted.
  • spray devices or other liquid distribution devices are provided in the wash cabinet SR. These can be, in particular, rotatable spray arms, an upper roof spray, and/or other liquid application devices, such as spray units specially attached to one or more dish baskets.
  • FIG. 1 In the washing chamber SR, a lower and an upper rotatable spray arm SV are shown as representative of the liquid application means, as well as a lower dish basket UB and an upper dish basket OB as representative of the storage units for the items to be cleaned.
  • washing liquid is supplied by means of a Figure 1
  • the water inlet system (omitted for simplicity of the drawing) is let into the wash chamber SR.
  • the wash liquid is pumped by means of a circulating pump UP via one or more liquid lines VL to the spray devices or liquid distribution devices such as SV and from there sprayed onto the items to be cleaned in the holding units.
  • the wash liquid drips to the floor and collects in a pump sump or pump pot PS, which is provided below the bottom wall of the wash container SB.
  • the circulating pump UP sucks the wash liquid from the pump sump PS, preferably via an intake nozzle, and pumps it to the spray devices or liquid distribution devices such as SV via the one or more liquid lines VL.
  • a liquid circulation circuit is provided. This can preferably comprise further components, such as a water switch for the selective control of the respective liquid line, which leads separately to the respective spray device or liquid distribution device.
  • a liquid heater or water heater WH is also provided in particular in order to heat the rinsing liquid to a desired heating temperature or target heating temperature if required.
  • the liquid heater WH is preferably assigned to the circulation pump UP.
  • the liquid heater is housed within the circulation pump, i.e., the circulation pump UP is preferably designed as a heating pump.
  • the sorption drying system SY has a recirculating air duct UK located outside the wash cabinet SR.
  • This recirculating air duct ⁇ K fluidically connects an air outlet AL of the wash cabinet SR with an air inlet EL of the wash cabinet SR.
  • the air outlet AL can be a through-opening in a side wall - as shown here in the exemplary embodiment of Figure 1 viewed from the front in the right-hand side wall - of the washing container SB and as an air inlet EL a through opening preferably in a different boundary wall of the washing chamber SR - here in the embodiment of Figure 1 in the bottom wall of the rinsing tank SB.
  • a sorption tank SOB is fluidically inserted into the recirculating air duct UK.
  • It contains a fixed bed FS of a loose, granular or granular, reversibly dehydratable sorption material SM.
  • This can preferably be spherical.
  • the bed of loose grains and/or granular pieces of the sorption material is preferably held between a lower sieve grid US and an upper sieve grid OS of the fixed bed FS. Viewed in the vertical direction, the bed has a predetermined maximum or upper bed height SH.
  • the fixed bed FS of the sorption material SM is accommodated in the sorption tank SOB in such a way that it can be flowed through by a forced air flow, which can be generated by means of an air conveying unit LF fluidically inserted into the recirculating air duct (UK), from bottom to top, in particular essentially in a vertical direction against the direction of gravity.
  • a forced air flow which can be generated by means of an air conveying unit LF fluidically inserted into the recirculating air duct (UK), from bottom to top, in particular essentially in a vertical direction against the direction of gravity.
  • a first air duct section LK1 of the recirculation duct UK runs between the air outlet AL of the wash cabinet SR and the air inlet EI of the sorption container SOB.
  • the air conveying unit LF is preferably fluidically inserted into this.
  • the air conveying unit LF is thus viewed in the flow direction of the wash cabinet air forced through it preferably fluidically inserted between the air outlet AL of the wash cabinet SR and the air inlet EI of the sorption container SOB in front of the sorption container SOB into the recirculating air duct ⁇ K.
  • the air conveying unit LF is expediently formed by a fan or blower. When the air conveying unit LF is in operation, i.e.
  • the washroom air forced through the fixed bed FS leaves the sorption tank SOB via an air outlet AU and is either directly or, as in this embodiment, by Figure 1 via a second air duct section LK2 of the recirculation duct UK into the air inlet EL of the wash chamber SR.
  • the air conveying unit LF If the air conveying unit LF is switched on, it draws air from the wash chamber SR via its air outlet AL into the recirculation duct UK and then blows this air through the fixed bed of loose, granular, or granular, reversibly dehydratable sorption material SM of the sorption container SOB and then back into the wash chamber SR via the air inlet EL.
  • air from the wash chamber i.e., wash chamber air
  • the sorption container SOB fluidically inserted in the recirculation duct UK and from there back into the wash chamber SR when the air conveying unit LF is switched on.
  • the forced air flow generated in this way during operation of the air conveying unit LF through the recirculation duct UK, through the fixed bed of loose sorption material SM and through the wash chamber SR is in the Figure 1 indicated by direction arrows ZLS.
  • the household dishwasher GS comprises a control/monitoring unit CO for carrying out one or more dishwashing programs.
  • Each dishwashing program comprises one or more rinsing phases, during which the items to be cleaned in the washing chamber are sprayed with rinsing liquid by means of one or more spray devices or liquid distribution devices, and a drying phase concluding the washing program. It preferably comprises, in chronological succession, a pre-rinse phase, a cleaning phase, a Intermediate rinsing phase and a final rinsing phase as liquid-carrying rinsing phases or rinsing steps.
  • Figure 4 illustrates the temporal sequence of these dishwashing phases, namely the pre-wash phase VP, the cleaning phase RP, the intermediate rinse phase ZP and the final rinse phase KP, and the drying phase TP at the end of the dishwashing program, each for two different dishwashing programs GP, EP, in detail.
  • the time t in seconds (abbreviated to sec) is plotted along the abscissa
  • the temperature SRT in degrees Celsius (abbreviated to °C) of the temperature in the dishwashing cabinet SR is plotted along the ordinate, which corresponds to the temperature of the respective dishwashing liquid and/or air temperature in the dishwashing cabinet SR.
  • the dishwashing cabinet temperature curve for the energy-saving dishwashing program EP is designated TSR
  • the dishwashing cabinet temperature curve for the dishwashing program GP is designated TSR'.
  • the temperature curve TSR' of the dishwashing program GP deviates from the temperature curve TSR of the energy-saving dishwashing program EP during the cleaning phase RP.
  • the section of the temperature curve TSR' assigned to the cleaning phase RP is shown in dash-dotted lines. Otherwise, the remaining sections VP, ZP, KP, TP of the two temperature curves TSR, TSR' correspond approximately to one another in this exemplary embodiment for the sake of simplicity.
  • fresh water at tap temperature from a fresh water supply line and/or preferably fresh water stored in a storage reservoir and/or service water at approximately room temperature UT is admitted into the wash chamber SR for the pre-wash phase VP by means of the water inlet system (not shown) of the household dishwasher GS.
  • the running circulating pump UP pumps the liquid to the spray devices or liquid distribution devices such as SV, from which it is sprayed onto the items to be cleaned or applied in some other way.
  • some or all of the wash liquid is pumped out.
  • a drain pump is preferably provided, which is located in the Figure 1 has been omitted for the sake of simplicity.
  • the drain pump partially or completely pumps the washing liquid out of the pump sump PS and conveys it out of the household dishwasher GS via a drain line.
  • the pre-wash step VP ends in the embodiment of Figure 4 at time tVE.
  • fresh water from the fresh water supply line, and/or fresh water and/or process water stored in a storage reservoir is admitted into the wash chamber SR for the cleaning phase RP and heated during the preferably predetermined duration tHE - tRS or tHE' - tRS of an initial heating phase HP or HP' to a required maximum cleaning temperature or target cleaning temperature RT or RT' up to the time tHE or tHE'.
  • the wash liquid for the cleaning step or the cleaning phase RP is circulated in the liquid circulation circuit by means of the circulation pump UP and sprayed onto the items to be cleaned by means of its spray devices or liquid application devices such as SV.
  • Detergent is preferably added to the wash liquid for the cleaning phase RP.
  • the rinse liquid mixed with rinse aid is distributed by the circulation pump UP via the supply lines VL to the spray devices or liquid distribution devices or liquid application devices such as SV and applied to the items to be cleaned in circulation mode.
  • the rinse liquid can, if necessary, be heated to a required maximum rinse water temperature KT by the water heater WH.
  • the rinse liquid is pumped out of the wash cabinet SR as completely as possible by means of a drain pump.
  • the air conveying unit LF is switched on at least during a period of time, in particular at least during an initial period, preferably during the entire duration of the drying phase TP of the respective dishwashing program to be carried out, such as GP, EP.
  • a period of time in particular at least during an initial period, preferably during the entire duration of the drying phase TP of the respective dishwashing program to be carried out, such as GP, EP.
  • warm, humid washroom air PL is sucked from the washroom SR into the recirculation duct UK and blown through the fixed bed FS of the loose, granular, or granular, reversibly dehydratable sorption material SM to dehumidify it.
  • the sorption material SM adsorbs water molecules from the warm, humid washroom air PL, so that the air that leaves the fixed bed FS on the outlet side and is blown into the washroom SR is drier than the warm, humid washroom air PL forcibly fed to the air inlet EI of the sorption container SOB.
  • This dried air leaving the sorption container SB via its air outlet AU and returned to the washing chamber SR is in the Figure 1 denoted by TL. Due to the continued circulation of the warm, moist washroom air PL through the fixed bed FS of the sorption material SM, the washroom air in the washroom SR and the wash ware items accommodated therein become increasingly dry during the drying phase TP.
  • the amount of sorption material SM is preferably such that at least the total amount of liquid adhering to the wash ware items can be largely or almost completely adsorbed by the sorption material SM during the drying phase TP.
  • the sorption drying can partially avoid additional heating of the final rinse liquid during the final rinse phase KP. or be dispensed with entirely.
  • the final rinse temperature KT to which the final rinse liquid has previously been heated up to the end of the final rinse phase KP in a household dishwasher without a sorption drying system, can be reduced in the household dishwasher according to the invention with a sorption drying system.
  • the items to be washed in the wash chamber SR are now dried during the drying phase mainly by means of the sorption drying system in that the wash chamber air PL, which is present in the wash chamber SR after the last liquid-carrying wash phase, in particular the final rinse phase, is removed from the wash chamber air PL by the sorption material SM of the fixed bed FS during forced circulation through the recirculation air duct UK by means of the air conveying unit LF, i.e. water molecules are removed by adsorption.
  • the water molecules adsorbed by it during the drying step of the preceding dishwashing program are actively expelled by heating the sorption material SM during the time period such as RD, KRD of a regeneration phase such as RG, KRG in a liquid-carrying rinsing step preceding the drying phase TP, in particular in a rinsing step with rinsing liquid that needs to be heated, preferably in the cleaning step RP, of this newly carried out dishwashing program such as GP, EP, by heating the sorption material SM during the time period such as RD, KRD of a regeneration phase such as RG, KRG.
  • a desorption heating device HV is assigned to the fixed bed FS of the sorption material SM, which desorption heating device HV heats the sorption material SM during the duration such as RD, KRD of the regeneration phase such as RG, KRG at least temporarily.
  • the desorption heating device HV in contrast to the air conveying unit LF, which preferably forcibly conveys air PL' from the wash cabinet through the sorption material SM for the entire duration of the regeneration phase, is switched on and operated in parallel with the air conveying unit, but is switched off a run-on period that is fixed for all dishwashing programs, i.e. always the same, before the end of the regeneration phase.
  • the air conveying unit LF is therefore preferably switched on continuously, so that air PL' is continuously forcibly conveyed from the wash chamber SR through the recirculation duct UK and thus through the sorption material of the fixed bed of the sorption container.
  • the desorption heating device HV is designed here in the exemplary embodiment in particular as an electric air heater, which is provided in the first air duct section LK1 of the recirculating air duct UK in front of the inlet-side end face of the fixed bed FS, viewed in the forced air flow direction ZLS.
  • the desorption heating device HV is located here in the exemplary embodiment of Figure 1 in particular in an anteroom of the sorption container SOB, which is arranged below the lower sieve grid US of the fixed bed FS.
  • the air PL' which flows through the fixed bed FS of the loose, granular or granular, reversibly dehydratable sorption material SM, is heated by the desorption heating device HV before entering the fixed bed FS, as viewed in the forced air flow direction ZLS of the air conveying unit LF, it is largely ensured that the air PL', which is supplied by the switched-on air conveying unit LF during Regeneration phase such as RG is promoted, flows into the fixed bed at a defined heating temperature and the heated air acts on the inlet side face, i.e. the inlet cross-sectional area, of the fixed bed FS, in a largely evenly distributed manner.
  • the spaces between the loose grains or granulate particles of the sorption material SM are largely evenly flowed through by the air heated by the desorption heating device HV. This largely evenly transfers thermal energy or heat energy to the grains or granulate of the sorption material SM, which are arranged in the respective passage cross-sectional area of the fixed bed FS.
  • the regeneration phase such as RG, KRG is carried out during a liquid-carrying rinsing phase, preferably during a heating phase such as HP, HP' of a rinsing phase with rinsing liquid to be heated, preferably the cleaning phase such as RP, of the currently running dishwashing program such as GP, EP (see Figure 4
  • the regeneration phase is carried out during at least one rinsing phase in which rinsing liquid is used before the final drying phase TP, so that the sorption material is sufficiently regenerated for this.
  • the heating-up phase such as HP, HP' of the cleaning phase such as RP is preferably made up of at least two successive partial heating sections:
  • the regeneration phase such as RG, KRG, in which the desorption heating device HV introduces thermal energy into the sorption material SM for its desorption, preferably takes place during a first partial section, in particular the initial section, of the heating-up phase such as HP, HP'.
  • the air delivery unit LF is in operation to supply air PL' from the wash cabinet SR and blow it through the fixed bed FS made of loose sorption material SM via the recirculation duct UK and return it to the wash cabinet SR via the air inlet EL.
  • the period of time such as RD, KRD, during which the air conveying unit LF is activated, i.e.
  • the desorption heating device HV heats the wash cabinet air PL', which is forcibly fed to the sorption material SM by means of the air conveying unit LF, at least temporarily by introducing thermal energy in such a way that the sorption material SM water, which was stored in the sorption material SM during the drying phase TP of the previous dishwashing program, is sufficiently desorbed for the drying phase TP of the currently running dishwashing program.
  • Part of the thermal energy provided by the desorption heating device HV is taken along by the air PL' flowing through the fixed bed FS and transported into the wash cabinet SR.
  • This portion of the thermal energy generated by the desorption heating device HV can thus contribute to heating the washing liquid present in the wash cabinet SR, the wash cabinet air present there, and/or the washware.
  • the washing liquid heater WH which is preferably switched on and operated later than the desorption heating device HV intended for regenerating the sorption material, requires less electrical energy to heat the washing liquid to a required minimum temperature, such as RT during the cleaning step RP.
  • a control logic LO adjusts the conveying volume flow FV of the air conveying unit LF for the regeneration phase, such as RG, KRG, of the respective dishwashing program, such as GP, EP, in such a way that the regeneration temperature TR achieved in the sorption material SM varies in a specific dependence on the respectively specified regeneration time period or target regeneration time period, such as RD, KRD, of the regeneration phase, such as RG, KRG, of the respective dishwashing program, such as GP, EP.
  • dishwashing programs with differently energy-intensive regeneration phases can be provided.
  • the domestic dishwasher GS is therefore able to carry out its various dishwashing programs, such as the energy-saving dishwashing program, intensive cleaning program, hot cleaning program, Glass washing, short program, night rinse program, extra drying, etc. ... to switch to different operating modes or operating modes, which differ from one another in terms of the different lengths of their regeneration phases and the different target regeneration temperatures specifically assigned to them.
  • various dishwashing programs such as the energy-saving dishwashing program, intensive cleaning program, hot cleaning program, Glass washing, short program, night rinse program, extra drying, etc. ... to switch to different operating modes or operating modes, which differ from one another in terms of the different lengths of their regeneration phases and the different target regeneration temperatures specifically assigned to them.
  • FIG 4 shows schematically that the regeneration phases RG, KRG of the two exemplary dishwashing programs GP, EP have different regeneration times RD, KRD.
  • the regeneration time KRD of the dishwashing program EP is shorter than the regeneration time RD of the other dishwashing program GP, i.e. KRD ⁇ RD applies.
  • the regeneration phase KRG of the energy-saving dishwashing program EP ends earlier at time tKRE, while the regeneration phase RG of the dishwashing program GP only ends later at time tRE (> tKRE).
  • the control logic LO is expediently a component of the control/monitoring unit CO, which is provided for executing the various dishwashing programs.
  • the control/monitoring unit CO and/or the control logic LO are preferably implemented by one or more hardware components, which in particular comprise a microcomputer system with an electronic storage system, and/or software components which are stored in at least one electronic memory of a computer, in particular a microcomputer system, of the household dishwasher GS, and which contain and implement the sequence of operations, i.e., the sequence of one or more rinsing steps or rinsing phases and the final drying step of the respective dishwashing program.
  • the control logic LO can be a program part or a subroutine of the sequence of operations of the respective dishwashing program to be executed, such as GP, EP.
  • the control logic LO When carrying out the regeneration phase such as RG, KRG of the various dishwashing programs such as GP, EP provided by the control unit CO, the control logic LO does not simply adjust the flow rate of the air conveying unit LF to the fact that for the regeneration of the loose Sorption material SM of the fixed bed FS always has the same target regeneration temperature RT equal to or above a limit temperature, which leads to the largely complete expulsion of the water adsorbed by the sorption material, but now makes a distinction according to the invention as to how high the regeneration temperature TR effected in the sorption material SM is in specific dependence on the respective specified regeneration time period such as RD, KRD of the regeneration phase such as RG, KRG of the respective dishwashing program such as GP, EP (see Figure 4 ).
  • the control logic LO is therefore not based on always achieving the same target regeneration temperature TR equal to or above a limit temperature which leads to the almost complete expulsion of the water adsorbed by the sorption material by the end of the regeneration phase such as RG, KRG of the respective dishwashing program such as GP, EP, but the control logic LO changes the conveying volume flow of the air conveying unit LF and thus the regeneration temperature RT respectively achieved in the sorption material SM in a specific or individual manner depending on the length or duration such as RD, KRD of the regeneration phase such as RG, KRG of the respective dishwashing program such as GP, EP.
  • the thermal energy expenditure for the regeneration of the sorption material SM can thus be specifically or individually adapted to the respective regeneration time duration of the regeneration phase of the respective dishwashing program.
  • control logic LO can control the flow rate of the air conveying unit LF for the regeneration phase RG of at least one energy-saving dishwashing program to be carried out, such as EP (see Figure 4 ) in particular such that the regeneration temperature TR achieved in the sorption material SM is lower or less than the limit regeneration temperature above which the sorption material SM would almost completely desorb all of the water adsorbed by it during the sorption drying phase TP of a preceding dishwashing program.
  • EP see Figure 4
  • the amount of water stored in the sorption material SM during the sorption drying phase TP of the preceding dishwashing program is deliberately not completely desorbed, but only partially until a deliberately increased minimum residual moisture amount or target residual moisture amount GW remains (see Figure 2 ) of water, which is more energy efficient, ie requires less thermal energy, than if the sorption material SM were heated at least to the limit regeneration temperature, above which the sorption material SM would almost completely desorb all of the water adsorbed by it.
  • Zeolite(s) of type A, and/or type Y, and/or type 13X are preferably provided as sorption material.
  • the control unit CO of the household dishwasher GS therefore preferably provides at least one energy-saving dishwashing program such as EP (see Figure 4 ), during which the household dishwasher GS is operated in a more energy-efficient regeneration operating mode than in other dishwashing programs provided by its control unit, such as GP.
  • EP energy-saving dishwashing program
  • the expulsion of this desired minimum residual moisture GW from the sorption material SM would require a disproportionately high expenditure of thermal energy RE, which would have to be provided by the desorption heating device HV by converting electrical energy into thermal energy.
  • the characteristic Curve CK indicates the regeneration energy RE in kilojoules per kilogram (abbreviated kJ/kg) that is required per adsorption volume W in cubic centimeters per gram (abbreviated cm 3 /g), i.e. volume of adsorbed water per dry mass of sorption material, to detach water molecules from the adsorption binding sites of the sorption material SM.
  • the adsorption volume W is plotted along the abscissa, and the corresponding regeneration energy RE along the ordinate.
  • the regeneration energy RE plotted along the ordinate thus essentially comprises the adsorption binding energy that must be generated to detach the water molecules from the sorption material, and additionally the sensible heat that is absorbed by the sorption material from the air forced through the fixed bed and heated by the desorption heating device and/or directly through its heating by the desorption heating device.
  • the adsorption volume W corresponds to a percentage (abbreviated as %) of residual moisture that remains in the sorption material SM at the respective applied regeneration energy RE.
  • the value W 0.05 cm 3 /g means that 0.05 l (liters) of water or 50 g of water per 1 kg of sorption material such as zeolite is adsorbed by it.
  • a water volume per given sorption material dry mass of 5% corresponds to a residual moisture content of 5%.
  • the total area below the characteristic curve CK represents the total amount of regeneration energy that is required to almost completely dry the total amount of sorption material, starting from its maximum saturation with water.
  • the first curve section CK1 is significantly flatter and lower than the second curve section CK2.
  • the boundary between the two curve sections CK1, CK2 is marked by a dash-dotted vertical line and is labeled GW.
  • the associated regeneration energy RE to be used increases approximately proportionally or disproportionately, the regeneration energy RE that must be used to expel the associated residual moisture in the sorption material increases disproportionately along the second curve section CK2.
  • the working area below the first curve section CK1, which is flatter and lower than the second curve section CK2, is designated AB.
  • the total area below the lower and flatter first curve section CK1 and the In contrast, the second, steeply rising and higher curve section CK2 corresponds to the total regeneration energy RE required to dry the sorption material SM from the saturation value SW of approximately 25% to a residual moisture content of 0%.
  • This total area below the first curve section CK1 and the disproportionately rapidly rising second curve section CK2 is designated UB.
  • the first curve section CK1 is assigned an average regeneration energy mRE - here of approximately 750 kJ/kg - which is significantly lower than the average regeneration energy mRE' - here of approximately 1050 kJ/kg - assigned to the overall curve CK.
  • control logic LO preferably ensures that when carrying out at least one energy-saving dishwashing program such as EP, the regeneration temperature RT brought about in the sorption material SM during the respective predetermined duration such as KRD of the regeneration phase such as KRG causes water molecules to be detached only from those adsorption binding sites of the sorption material which require a lower average regeneration energy such as mRE compared to those adsorption binding sites of the sorption material for which a disproportionately higher regeneration energy per adsorption volume, i.e. volume of adsorbed water per dry mass of sorption material, is required.
  • the regeneration temperature RT brought about in the sorption material SM during the respective predetermined duration such as KRD of the regeneration phase such as KRG causes water molecules to be detached only from those adsorption binding sites of the sorption material which require a lower average regeneration energy such as mRE compared to those adsorption binding sites of the sorption material for which a disproportionately higher regeneration energy per adsorption volume, i.e. volume of adsorbed
  • the regeneration is limited to the detachment of adsorbed water only from the adsorption binding sites of the sorption material with the weaker adsorption binding energy by deliberately lowering the regeneration temperature brought about compared to the limit regeneration temperature.
  • the adsorption binding sites of the sorption material with a higher adsorption binding energy are, however, deliberately no longer used for the regeneration of the sorption material. This improves the energy efficiency during desorption or regeneration, i.e., a lower total amount of thermal energy is required to expel a desired volume of adsorbed water per dry mass of the sorption material.
  • the control logic LO can increase the conveying volume flow or air throughput of the air conveying unit LF during the regeneration phase RG while the heating output HL of the desorption heating device HV is constant or fixed.
  • the control logic LO which is preferably a component of the control unit CO, sends at least one control signal SLD to the air conveying unit LF, preferably via a control line SL1.
  • a household dishwasher with a width of 60 cm and a sorption material mass, in particular zeolite mass, of approximately 1.3 kg and a fixed heating power HL of the desorption heating device HV of approximately 1450 It is advantageous to increase the volume flow for the air conveying unit (LF) so that it is approximately between 30 and 35 m3 /h during the regeneration phase. This allows for improved energy-efficient desorption of approximately 160 g of water.
  • LF air conveying unit
  • a desorption heating device which preferably provides the same, fixed or constant electrical heating output for heating the air PL' forcibly conveyed by the air conveying unit LF for the regeneration phases of different dishwashing programs
  • the electrical energy consumption of the desorption heating device is determined according to the relationship: the electrical energy consumption is directly proportional to the multiplication product of the regeneration time and the given electrical power HL of the desorption heating device HV.
  • the Figure 3 shows, by way of example, in relation to the zeolite types specified above and preferably provided, in a schematic representation the curves TRH, TRN of the resulting regeneration temperatures TR in degrees Celsius (abbreviated: °C), which are caused in relation to the total mass of the loose sorption material of the fixed bed at the various height positions HS (in meters (abbreviated: m)) of the height extension up to the specified bed height SH of the fixed bed FS of the sorption material SM with the same specified short regeneration time duration KRD, e.g.
  • the two different inlet temperatures ETH, ETN are each selected to be lower than the limit temperature of approximately 280°C for zeolite(s) of type A, type Y, and/or type 13X, which would lead to the almost complete expulsion of the water adsorbed by the sorption material.
  • the temperature of the washroom air flow PL' at which it enters the fixed bed FS of the sorption material SM can be adjusted according to the inventive principle by changing the delivery volume flow of the air delivery unit LF.
  • the air delivery unit LF is preferably designed as a fan, the delivery volume flow FV caused by it can be specifically adjusted by changing its speed.
  • the speed of the fan is in the Figure 1 denoted by LD.
  • the control unit LO sends at least one corresponding control signal SLD to the fan via the control line SL1.
  • the total filling height SH of the fixed bed FS in this embodiment is Figure 3 approximately 0.06 m.
  • the outlet-side, in particular upper, area of the fixed bed FS ie the area of the sorption material SM in front of the downstream outlet of the fixed bed FS, is less or hardly regenerated, since there the temperature TR in the sorption material drops too far.
  • the detachment of adsorbed water is specifically limited to those adsorption loading sites or binding sites of the sorption material with weaker adsorption binding energies.
  • the thermal energy introduced into the fixed bed FS by the air flow PL' can be transported further along the flow, in particular vertical extent, of the fixed bed, particularly advantageously to the outlet end of the fixed bed, with a sufficiently high thermal energy, which causes a sufficiently high regeneration temperature there to detach water molecules from adsorption loading sites of the sorption material with weaker adsorption binding energy.
  • this results in a uniform heating and thus desorption of the sorption material across the entire bed height SH of the sorption material of the fixed bed FS, with an overall lower expenditure of thermal energy.
  • control unit CO of the household dishwasher GS has at least one energy-saving dishwashing program such as EP (see Figure 4 ), which, when carried out by the control/monitoring unit, the control logic LO determines the duration of the regeneration phase such as KRG compared to other implemented, less energy-efficient Dishwashing programs such as GP are shortened to a short regeneration period such as KRD and at the same time the regeneration temperature TR achieved in the sorption material SM is reduced to a reduced regeneration temperature, i.e. reduced regeneration temperature, such as ETN, compared to other selectable, less energy-efficient dishwashing programs such as GP.
  • EP energy-saving dishwashing program
  • the reduced regeneration temperature refers to a regeneration temperature that is lower than the limit regeneration temperature above which the sorption material SM would almost completely desorb all of the water adsorbed by it during the drying phase of the preceding dishwashing program during the specified regeneration period.
  • adsorption materials suitable for sorption drying such as preferably zeolite(s) of type A, and/or type Y, and/or type 13X
  • the control logic LO sets the short regeneration temperature, such as KRD for the regeneration phase of the energy-saving dishwashing program, such as EP, between 5 minutes and 15 minutes, and the conveying volume flow of the air conveying unit LF for the regeneration phase of the energy-saving dishwashing program in such a way that during the short regeneration period of the regeneration phase, a reduction regeneration temperature of at least 120 °C and at most 200 °C, in particular of at least 120 °C and at most 150 °C, is brought about in the sorption material SM, which is lower than the limit regeneration temperature, with regard to
  • a fan or blower is preferably provided as the air conveying unit LF, then with a fixed or constant heating output HL of the heating device HV, a reduction in the inlet temperature at which the forced air PL' enters the fixed bed FS can be ensured in a simple manner by increasing the speed of the fan or blower.
  • the reduction of the inlet temperature of the wash chamber air flow PL', which is conveyed into the fixed bed FS, below the limit regeneration temperature or limit temperature at which an almost complete desorption of the sorption material SM would be possible, is accompanied by an increased minimum residual moisture, in particular between at least 5% and at most 15%, preferably when using zeolite(s) of type X, type Y, and/or type 13X, in the sorption material SM remains.
  • the heat front advancing from the inlet of the fixed bed during the specified short regeneration period KRD in the sorption material SM can penetrate further or ideally all the way to the outlet end of the fixed bed FS and release water molecules from the adsorption bonds on the sorption material.
  • the Figure 4 illustrates the various liquid-carrying or water-carrying rinsing phases VP, RP, ZP, KP and the final drying phase TP of both the energy-saving dishwashing program EP and the less energy-efficient dishwashing program GP.
  • the duration KRD of its regeneration phase KRG is shortened compared to the duration RD of the regeneration phase RG of the dishwashing program GP, i.e. KRD ⁇ RD applies.
  • the regeneration temperature TR produced in the sorption material during its shorter regeneration phase KRG is reduced compared to the regeneration temperature produced during the longer regeneration phase RG of the dishwashing program GP.
  • the flow rate FV of the wash chamber air PL' forced through the fixed bed FS by means of the air conveying unit LF during the regeneration phase KRG of the energy-saving dishwashing program EP is increased compared to the flow rate of the wash chamber air PL' forced through the fixed bed FS by means of the air conveying unit LF during the regeneration phase RG of the dishwashing program GP.
  • the desorption heating device HV operates with the same or approximately constant thermal output during the regeneration phases KRG and RG of these two programs EP and GP. Electronic power control is then not required for the desorption heating device HV.
  • the heating phase HP, HP' of the cleaning phase RP of the respective program EP, GP preferably consists of a desorption heating phase KRG, RG, during which the air PL', which is forced into the fixed bed FS by the air conveying unit LF, is heated solely by means of the desorption heating device HV, and a subsequent rinsing liquid heating phase KPW, PW, during which only the water heating WH (with the desorption heating device HV switched off)
  • the rinsing liquid - here in the cleaning step the cleaning liquid - is heated in the circulation circuit or rinsing liquid distribution circuit of the household dishwasher GS, which includes the circulation pump UP.
  • the shortened regeneration phase or desorption phase KRG of the energy saving program EP preferably takes place during an initial section of the heating phase HP of its cleaning phase RP from its start time tRS until the time tKRE.
  • the approximately straight-line temperature curve resulting in the wash cabinet SR during the short regeneration phase KRG is designated KTR, and the approximately straight-line temperature curve resulting in the wash cabinet SR during the heating phase of the liquid heater WH is designated KTW.
  • the regeneration phase or desorption phase RG of the less energy-efficient dishwashing program GP preferably takes place during an initial subsection of the heating phase HP' of its cleaning phase RP, from its start time tRS until time tRE.
  • VTR the approximately straight-line temperature curve resulting in the wash cabinet SR during the regeneration phase RG of the less energy-efficient dishwashing program GP
  • VTW approximately straight-line temperature curve resulting for the dishwashing program GP in the wash cabinet SR during the heating phase of the liquid heater WH.
  • Both temperature curve sections VTR, VTW are shown in dash-dotted lines.
  • the curve section VTR of the dishwashing program GP continues the curve section KTR of the energy-saving dishwashing program EP at approximately the same gradient, as the desorption heating device HV operates with the same constant heating output during the regeneration phases KRG, RG of both programs EP, GP.
  • the temperature profile resulting in the dishwashing cabinet SR during the longer regeneration phase RG of the dishwashing program GP is designated VTR, and the temperature profile resulting in the dishwashing cabinet SR during the heating phase PW of the liquid heater WH is designated VTW.
  • the required target dishwashing chamber temperature RT' RT is reached somewhat later in the dishwashing program GP by heating the dishwashing liquid using the water heater WH than in the energy-saving dishwashing program EP.
  • the regeneration phase RG of the dishwashing program GP includes a Figure 4
  • the approximately straight-line profile section VTR of the temperature SRT in the wash cabinet SR is shown in dash-dotted lines and extends the approximately straight-line profile section KTR of the wash cabinet temperature SRT, which results during the regeneration phase KRG of the energy-saving dishwashing program, at approximately the same gradient, since the desorption heating device HV operates with the same constant heating output HL during the regeneration phases KRG, RG of the two programs EP, GP.
  • the heating of the rinsing liquid and the washing chamber SR in the energy saving program EP takes place proportionally longer than in the heating phase HP' of the dishwashing program GP directly by the rinsing liquid heating WP in relation to the total time tHE - tRS of the heating phase HP during the time period tHE - tRE of the second section KPW of the heating phase HP of the cleaning phase RP. From an energetic point of view, this is more advantageous (than in the dishwashing program GP) because during the regeneration phase only a portion of the heat energy generated by the electrical desorption heating device HV is introduced into the wash cabinet SR by means of the forced air flow PL' during the cleaning phase RP and can contribute to heating the wash cabinet or the wash liquid introduced there.
  • the total heat energy generated to desorb the sorption material SM by means of the electrical desorption heating device HV is reduced by the thermal dissolution energy required to overcome the adsorption binding forces, by the sensible heat absorbed by the sorption material until the target regeneration temperature RT is reached, and by the waste heat losses of the heated sorption material to the environment of the sorption container.
  • it is energetically more efficient to heat the rinsing liquid used for the cleaning cycle RP directly with the rinsing liquid heater WH than indirectly via the forced air flow generated for regeneration and heated by the desorption heating device HV.
  • the regeneration temperature in the sorption material is also lowered or reduced in the energy-saving dishwashing program EP, as explained in detail above.
  • the fixed bed of sorption material is heated to a lesser extent and absorbs a lower amount of sensible heat and loses less waste heat to the environment.
  • water molecules can be detached more frequently and more evenly from the adsorption binding sites of the sorption material with weaker binding energy, so that the total amount of sorption material can adsorb a specific, desired amount of water during the drying cycle.
  • This preferably corresponds approximately to at least the total amount of water with which the items to be washed are wetted at the end of the last washing phase containing washing liquid, in particular the final rinse phase.
  • the air conveying unit LF has an additional air outlet to the environment.
  • This is shown in the Figure 1 shown in dash-dotted lines and labelled AG. It can be opened and closed by means of the control unit CO via a control line SL3 using at least one control signal SLA. close.
  • the additional air outlet AG is only opened during the drying phase of the respective dishwashing program. Through the additional outlet AG, an additional amount of exhaust air ALU can then be blown out of the wash cabinet SR into the environment, creating a negative pressure in the wash cabinet SR. As a result, ambient air UL is sucked into the wash cabinet SR through an inlet opening, such as an expansion opening in a wall of the wash tub.
  • FIG. 1 Such an inlet opening for ambient air is also shown in dash-dotted lines and labeled EO.
  • the additional output AG remains closed to avoid unwanted thermal energy losses to the environment.

Landscapes

  • Washing And Drying Of Tableware (AREA)

Claims (12)

  1. Lave-vaisselle ménager (GS)
    - avec un espace de lavage (SR) pour l'accueil de pièces à laver,
    - avec une unité de commande/contrôle (CO) pour l'exécution de plusieurs programmes de lavage de vaisselle (GP, EP), dans lequel le programme de lavage de vaisselle respectif (GP, EP) comprend une ou plusieurs phase(s) de lavage (VP, RP, ZP, KP), pendant lesquelles les pièces à laver sont alimentées en liquide de lavage, et une phase de séchage terminant le programme de lavage, et
    - avec un système de séchage par sorption (SY), qui
    • comprend un canal à air circulant (UK) disposé en dehors de l'espace de lavage (SR), qui relie fluidiquement une sortie d'air (AL) de l'espace de lavage (SR) à une entrée d'air (EL) de l'espace de lavage (SR),
    • un réservoir de sorption (SOB) inséré fluidiquement dans le canal à air circulant (UK), dans lequel est logé un lit fixe (FS) d'un matériau de sorption (SM) déshydrogénable réversiblement granuleux ou en granulés,
    • une unité de ventilation (LF) insérée fluidiquement dans le canal à air circulant (UK) qui, au moins pendant une période de temps, en particulier une période de temps initiale, de la phase de séchage du programme de lavage de vaisselle respectif à exécuter, transporte de force de l'air chaud et humide de l'espace de lavage (PL) hors de l'espace de lavage (SR) pour sa déshumidification à travers le réservoir de sorption (SOB), et
    • un dispositif de chauffage par désorption (HV) avec une puissance de chauffage (HL) prédéfinie de manière fixe qui, au moins par intermittence pendant une phase de régénération (RG, KRG), pendant laquelle l'unité de ventilation (LF) transporte de force de l'air de l'espace de lavage (PL') à travers le canal à air circulant (UK) et qui se déroule dans au moins une phase de lavage, en particulier la phase de nettoyage (RP), du programme de lavage de vaisselle respectif à exécuter (GP, EP), chauffe l'air de l'espace de lavage (PL') amené au matériau de sorption (SM) du lit fixe (FS) en apportant de l'énergie thermique de telle sorte que le matériau de sorption (SM) désorbe l'eau qui a été accumulée dans le matériau de sorption (SM) pendant la phase de séchage (TP) du programme de lavage de vaisselle précédent,
    caractérisé en ce
    que l'unité de commande/contrôle (CO) met à disposition plusieurs programmes de lavage de vaisselle (GP, EP) dont les phases de régénération (RG, KRG) présentent des durées de régénération (RD, KRD) différentes, et en ce qu'une logique de commande (LO) pour la phase de régénération (RG, KRG) du programme de lavage de vaisselle respectif (GP, EP) modifie le débit volumique (FV) de l'air de l'espace de lavage (PL') transporté par l'unité de ventilation (LF) en fonction spécifique de la durée de régénération (RD, KRD) prédéfinie respective de la phase de régénération (RG, KRG) du programme de lavage de vaisselle (GP, EP) respectif de telle sorte que la température d'entrée (ET) de l'air de l'espace de lavage (PL') chauffé au moyen du dispositif de chauffage par désorption (HV), transporté dans le lit fixe (FS) pendant la phase de régénération (RG, KRG) du programme de lavage de vaisselle (GP, EP) respectif est réglée et, par conséquent, la température de régénération (TR) provoquée dans le matériau de sorption (SM) sur l'étendue d'écoulement (HS) du lit fixe (FS) est réglée en fonction spécifique de la durée de régénération (RD, KRD) prédéfinie respective de la phase de régénération (RG, KRG) du programme de lavage de vaisselle (GP, EP) respectif.
  2. Lave-vaisselle ménager selon la revendication 1, caractérisé en ce que le dispositif de chauffage par désorption (HV) est un chauffage à air électrique prévu dans le canal à air circulant (UK) en amont de la surface de section transversale d'entrée du lit fixe (FS) logé dans le réservoir de sorption (SOB), vu dans la direction d'écoulement d'air forcé (ZLS) de l'unité de ventilation (LF).
  3. Lave-vaisselle ménager selon au moins une des revendications précédentes,
    caractérisé en ce que l'unité de ventilation (LF) est un ventilateur dont la logique de commande (LO) règle la vitesse de rotation (LD) en fonction spécifique de la durée de régénération (RD, KRD) prédéfinie respective de la phase de régénération (RG, KRG) du programme de lavage de vaisselle (GP, EP) respectif.
  4. Lave-vaisselle ménager selon au moins une des revendications précédentes,
    caractérisé en ce que la logique de commande (LO) fait partie intégrante de l'unité de commande/contrôle (CO).
  5. Lave-vaisselle ménager selon au moins une des revendications précédentes, caractérisé en ce que l'unité de commande/contrôle (CO) met à disposition au moins un programme de lavage de vaisselle à économie d'énergie (EP), lors de l'exécution duquel la logique de commande (LO) raccourcit la durée de régénération de la phase de régénération (KRG) par rapport à la durée de régénération (RD) de la phase de régénération (RG) d'au moins un autre programme de lavage de vaisselle (GP) sélectionnable et augmente simultanément le débit volumique (FV) de l'unité de ventilation (LF) par rapport au débit volumique de l'unité de ventilation (LF) spécifiquement attribué à l'autre programme de lavage de vaisselle (GP).
  6. Lave-vaisselle ménager selon la revendication 5, caractérisé en ce que lors de l'exécution du programme de lavage de vaisselle à économie d'énergie (EP), la logique de commande (LO) réduit de telle sorte la durée de la phase de régénération (KRG), par rapport à la durée de régénération (RD) de la phase de régénération (RG) de l'autre programme de lavage de vaisselle (GP) sélectionnable, à une durée de régénération courte (KRD) et augmente simultanément de telle sorte le débit volumique (FV) de l'unité de ventilation (LF), par rapport au débit volumique de l'unité de ventilation (LF) spécifiquement attribué à l'autre programme de lavage de vaisselle (GP), que la température de régénération (TR) provoquée dans le matériau de sorption (SM) dans la zone du lit fixe (FS) du côté de l'entrée d'écoulement est abaissée à une température de régénération réduite (TRN'), qui est inférieure à la température de régénération (TRH') provoquée dans l'autre programme de lavage de vaisselle (GP) sélectionnable dans le matériau de sorption (SM) dans la zone du lit fixe (FS) du côté de l'entrée d'écoulement, et la température de régénération (TR) provoquée dans le matériau de sorption (SM) dans une zone fluidiquement en aval du lit fixe, en particulier une zone associée à la sortie d'écoulement du lit fixe (FS) est élevée à une température de régénération augmentée (TRN") qui est supérieure à la température de régénération (TRH") provoquée dans le matériau de sorption (SM) dans l'autre programme de lavage de vaisselle sélectionnable (GP) dans la zone fluidiquement en aval du lit fixe, en particulier dans la zone associée à la sortie d'écoulement du lit fixe (FS).
  7. Lave-vaisselle ménager selon l'une des revendications 5 ou 6, caractérisé en ce que la logique de commande (LO) règle la durée de régénération courte (KRD) pour la phase de régénération (KRG) du programme de lavage de vaisselle à économie d'énergie (EP), en particulier en présence de l'utilisation de zéolithe(s) de type A, de type Y et/ou de type 13X comme matériau de sorption, inférieure ou égale à 15 minutes, en particulier entre 5 minutes et 15 minutes, et augmente simultanément le débit volumique (FV) de l'unité de ventilation (LF) pendant la phase de régénération (KRG) du programme de lavage de vaisselle à économie d'énergie (EP) de telle sorte que pendant cette durée de régénération courte (KRD) de la phase de régénération (KRG), une température de régénération réduite (TRN') d'au moins 120° Celsius et d'au plus 200° Celsius, en particulier d'au moins 120° Celsius et d'au plus 150° Celsius, est provoquée dans la zone du lit fixe (FS) située du côté de l'entrée d'écoulement, dans le matériau de sorption (SM).
  8. Lave-vaisselle ménager selon au moins une des revendications précédentes,
    caractérisé en ce que la logique de commande (LO) règle la température d'entrée (ET) de l'air de l'espace de lavage (PL') transporté dans le lit fixe (FS) de façon d'autant plus faible que la durée (KRD) de la phase de régénération (KRG) du programme de lavage de vaisselle correspondant, en particulier du programme de lavage de vaisselle à économie d'énergie (EO), est courte.
  9. Lave-vaisselle ménager selon au moins une des revendications précédentes,
    caractérisé en ce que l'unité de commande/contrôle (CO) met à disposition au moins un programme de lavage de vaisselle à économie d'énergie (EP) dans lequel la logique de commande (LO) pour abaisser la température d'entrée (ET) de l'air de l'espace de lavage (PL') chauffé au moyen du dispositif de chauffage par désorption (HV), qui est transporté dans le lit fixe (FS) pendant la phase de régénération (KRG) du programme de lavage de vaisselle à économie d'énergie (EP) au moyen de l'unité de ventilation (LF), règle le débit volumique (FV) de l'unité de ventilation (LF) de façon augmentée par rapport à un ou plusieurs autre(s) programme(s) de lavage de vaisselle à moindre efficience énergétique de telle sorte que le matériau de sorption (SM) du lit fixe (FS) est uniquement amené, pendant la durée de régénération (KRD) prédéfinie respective de la phase de régénération (KRG), à une température de régénération (TR) à laquelle une humidité résiduelle minimale accrue (GW) en eau comprise entre 5 % et 15 %, en particulier entre environ 10 % et 15 %, par rapport à la masse sèche totale du matériau de sorption (SM), plus élevée que la quantité d'humidité résiduelle minimale restant adsorbée par le matériau de sorption à la température de régénération limite, demeure dans le matériau de sorption.
  10. Lave-vaisselle ménager (GS) selon au moins une des revendications précédentes, caractérisé en ce qu'une logique de commande (LO) règle spécifiquement, pour la durée prédéfinie (KRD) de la phase de régénération (KRG) d'au moins un programme de lavage de vaisselle à économie d'énergie (EP), le débit volumique (FV) de l'air de l'espace de lavage (PL') transporté par l'unité de ventilation (LF) de telle sorte que la température de régénération (TR) provoquée dans le matériau de sorption (SM) du lit fixe (FS) pendant la durée respective prédéfinie (KRD) de la phase de régénération (KGR), enlève l'eau, pendant la durée (KRD) de la phase de régénération (KRG), uniquement des sites de liaison d'adsorption du matériau de sorption (SM) qui nécessitent une énergie de régénération moyenne (mRE) moindre par rapport aux sites de liaison d'adsorption du matériau de sorption (SM) pour lesquels une énergie de régénération (URE) disproportionnellement plus élevée par volume d'adsorption (W), c'est-à-dire par volume d'eau adsorbée par masse sèche de matériau de sorption, est à déployer.
  11. Lave-vaisselle ménager selon la revendication 10, caractérisé en ce que lors de l'exécution du programme de lavage de vaisselle à économie d'énergie (EP), la logique de commande (LO) augmente le débit volumique (FV) de l'unité de ventilation (LF) pendant la durée prédéfinie (KRD) de la phase de régénération (KGR) par rapport à un ou plusieurs autre(s) programme(s) de lavage de vaisselle (GP) mis à disposition par l'unité de commande/contrôle (CO), de telle sorte que pendant la durée prédéfinie (KRD) de la phase de régénération (KRG) du programme de lavage de vaisselle à économie d'énergie (EP), l'eau est uniquement enlevée des sites de liaison d'adsorption du matériau de sorption (SM) qui nécessitent une énergie de régénération moyenne (mRE) moindre par rapport aux sites de liaison d'adsorption du matériau de sorption (SM) pour lesquels une énergie de régénération (URE) disproportionnellement plus élevée par volume d'adsorption (W), c'est-à-dire par volume d'eau adsorbée par masse sèche de matériau de sorption, est à déployer, tandis que l'eau demeure sur les sites de liaison d'adsorption du matériau de sorption (SM) avec une énergie de liaison (URE) disproportionnellement élevée par volume d'adsorption (W).
  12. Procédé d'exploitation d'un lave-vaisselle ménager (GS), formé en particulier selon au moins une des revendications précédentes, qui présente :
    - un espace de lavage (SR) pour l'accueil de pièces à laver,
    - une unité de commande/contrôle (CO) pour l'exécution d'un ou plusieurs programme(s) de lavage de vaisselle (GP, EP), dans lequel le programme de lavage de vaisselle respectif (GP, EP) comprend une ou plusieurs phase(s) de lavage (VP, RP, ZP, KP), pendant lesquelles les pièces à laver sont alimentées en liquide de lavage, et une phase de séchage terminant le programme de lavage, et
    - un système de séchage par sorption (SY), qui
    • comprend un canal à air circulant (UK) disposé en dehors de l'espace de lavage (SR), qui relie fluidiquement une sortie d'air (AL) de l'espace de lavage (SR) à une entrée d'air (EL) de l'espace de lavage (SR),
    • un réservoir de sorption (SOB) inséré fluidiquement dans le canal à air circulant (UK), dans lequel est logé un lit fixe (FS) d'un matériau de sorption (SM) déshydrogénable réversiblement granuleux ou en granulés,
    • une unité de ventilation (LF) insérée fluidiquement dans le canal à air circulant (UK) qui, au moins pendant une période de temps, en particulier une période de temps initiale, de la phase de séchage (TP) du programme de lavage de vaisselle respectif à exécuter (GP, EP), transporte de force de l'air chaud et humide de l'espace de lavage (PL) hors de l'espace de lavage (SR) pour sa déshumidification à travers le réservoir de sorption (SOB), et
    • un dispositif de chauffage par désorption (HV) avec une puissance de chauffage (HL) prédéfinie de manière fixe qui, au moins par intermittence pendant une phase de régénération (RG, KRG), pendant laquelle l'unité de ventilation (LF) transporte de force de l'air de l'espace de lavage (PL') à travers le canal à air circulant (UK) et qui se déroule dans au moins une phase de lavage, en particulier la phase de nettoyage (RP), du programme de lavage de vaisselle respectif à exécuter (GP, EP), chauffe l'air de l'espace de lavage (PL') amené au matériau de sorption (SM) en apportant de l'énergie thermique de telle sorte que le matériau de sorption (SM) désorbe l'eau qui a été accumulée dans le matériau de sorption (SM) pendant la phase de séchage (TP) du programme de lavage de vaisselle précédent,
    caractérisé en ce
    que plusieurs programmes de lavage de vaisselle (GP, EP) sont mis à disposition par l'unité de commande/contrôle (CO), dont les phases de régénération (RG, KRG) présentent des durées de régénération (RD, KRD) différentes, et en ce qu'au moyen d'une logique de commande (LO) pour la phase de régénération (RG, KRG) du programme de lavage de vaisselle respectif (GP, EP), le débit volumique (FV) de l'air de l'espace de lavage (PL') transporté par l'unité de ventilation (LF) en fonction spécifique de la durée de régénération (RD, KRD) prédéfinie respective de la phase de régénération (RG, KRG) du programme de lavage de vaisselle (GP, EP) respectif est modifié de telle sorte que la température d'entrée (ET) de l'air de l'espace de lavage (PL') chauffé au moyen du dispositif de chauffage par désorption (HV), transporté dans le lit fixe (FS) pendant la phase de régénération (RG, KRG) du programme de lavage de vaisselle (GP, EP) respectif est réglée et, par conséquent, la température de régénération (TR) provoquée dans le matériau de sorption (SM) sur l'étendue d'écoulement (HS) du lit fixe (FS) est réglée en fonction spécifique de la durée de régénération (RD, KRD) prédéfinie respective de la phase de régénération (RG, KRG) du programme de lavage de vaisselle (GP, EP) respectif.
EP22740878.8A 2021-07-19 2022-07-07 Lave-vaisselle domestique doté d'un système de séchage par sorption et procédé associé pour exécuter un programme de lavage de vaisselle à économie d'énergie Active EP4373378B1 (fr)

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DE102021207644.0A DE102021207644A1 (de) 2021-07-19 2021-07-19 Haushaltsgeschirrspülmaschine mit einem Sorptionstrocknungssystem sowie zugehöriges Verfahren zum Durchführen eines Energiespar- Geschirrspülprogramms
PCT/EP2022/068856 WO2023001567A2 (fr) 2021-07-19 2022-07-07 Lave-vaisselle domestique doté d'un système de séchage par sorption et procédé associé pour exécuter un programme de lavage de vaisselle à économie d'énergie

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WO2023001567A2 (fr) 2023-01-26

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