EP4373378A2 - Haushaltsgeschirrspülmaschine mit einem sorptionstrocknungssystem sowie zugehöriges verfahren zum durchführen eines energiespar-geschirrspülprogramms - Google Patents
Haushaltsgeschirrspülmaschine mit einem sorptionstrocknungssystem sowie zugehöriges verfahren zum durchführen eines energiespar-geschirrspülprogrammsInfo
- Publication number
- EP4373378A2 EP4373378A2 EP22740878.8A EP22740878A EP4373378A2 EP 4373378 A2 EP4373378 A2 EP 4373378A2 EP 22740878 A EP22740878 A EP 22740878A EP 4373378 A2 EP4373378 A2 EP 4373378A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- regeneration
- sorption material
- phase
- air
- sorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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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
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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
- A47L15/0047—Energy or water consumption, e.g. by saving energy or water
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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
- A47L15/42—Details
- A47L15/48—Drying arrangements
- A47L15/481—Drying arrangements by using water absorbent materials, e.g. Zeolith
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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
- 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
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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
- 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
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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
- 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 invention relates to a household dishwasher with a washing compartment for receiving items to be cleaned, with a control/monitoring unit for carrying out one or more
- Dishwashing programs the respective dishwashing program having one or more rinsing phases during which the items to be washed are to be cleaned
- a circulating air duct arranged outside of the rinsing chamber, which fluidically connects an air outlet of the rinsing chamber with an air inlet of the rinsing chamber
- a sorption container fluidically inserted into the circulating air channel, in which a fixed bed of a granular or granular, reversibly dehydratable sorption material is accommodated
- an air conveying unit fluidically inserted into the circulating air duct, which forcibly conveys warm, humid washing room air out of the washing room to dehumidify it through the sorption container at least during a period of time, in particular an initial period of time, of the drying phase of the respective dishwashing program to be carried out, and
- a desorption heating device with a fixed predetermined heat output, which at least temporarily during a regeneration phase, during which the air conveying unit forces washing room air through the circulating air duct and which takes place in at least one washing phase, in particular the cleaning phase, of the respective dishwashing program to be carried out, the washing room air supplied to the sorption material with the contribution of Thermal energy heats up in such a way that the sorption material desorbs water that has been stored in the sorption material during the drying phase of the dishwashing program preceding the time.
- the desorption heating device heats the washing room air that is forcibly supplied to this sorption material by means of the air conveying unit at least temporarily during the regeneration phase with a fixed, predetermined or constant heating output using electrical energy.
- It is preferably designed as an electric air heater, which is provided in the circulating air duct in front of the inlet cross-sectional area of the fixed bed accommodated in the sorption container, viewed in the forced air flow direction of the air conveying unit. It thus heats the scavenging room air that is forcibly conveyed by means of the air conveying unit during the respective regeneration phase, viewed in the direction of flow, before it enters the fixed bed.
- the invention is based on the object of further improving the energy efficiency of such a household dishwasher with a sorption drying system.
- a control logic for the regeneration phase of the respective dishwashing program changes the delivery volume flow of the washing chamber air delivered by the air delivery unit as a specific function of the respectively specified regeneration period of the regeneration phase of the respective dishwashing program in such a way that the inlet temperature of the during the regeneration phase of the respective dishwashing program into the fixed bed and heated by means of the desorption heating device in the washing room air and, as a result, the regeneration temperature caused in the sorption material over the through-flow extent of the fixed bed is set as a specific function of the respectively specified regeneration period of the regeneration phase of the respective dishwashing program.
- the control logic therefore adjusts the delivery volume flow of the washing room air delivered by the air delivery unit individually or specifically to the respectively specified duration of the regeneration phase of the respective dishwashing program.
- the control/monitoring unit controls several dishwashing programs that are different from one another, such as an energy-saving dishwashing program, in particular a so-called eco dishwashing program, a so-called auto dishwashing program, in which the degree of soiling of the washing liquid in particular when washing the items to be cleaned is preferably determined by means of at least one Sensor technology such as a turbidity sensor is determined and used for the automatic setting of at least one washing parameter and/or drying parameter, a quick program, an intensive cleaning program (in particular with an increased temperature during its cleaning phase), a night cleaning program, a special program for washing glasses, etc.
- control logic assigns these different lengths of regeneration periods of the regeneration phases different randomlyvol flow rates or throughput rates, ie flow volume per time, of the respective funded by the air conveyor unit during these regeneration phases rinsing room air.
- control logic adjusts the delivery volume flow of the washing room air delivered by the air delivery unit for the regeneration phase if the respectively selected dishwashing program changes the duration of its regeneration phase, ie lengthens or shortens it.
- the current dishwashing program to be carried out can shorten its regeneration phase if the washing chamber of the dishwasher was only partially loaded with dishes in the previous dishwashing program, so that after the last partial washing phase of this preceding dishwashing program during its drying phase from the sorption material of the sorption drying system, a lower total amount of water than with a full load washware was to be picked up.
- This individual or specific adjustment of the delivery volume flow of the washing room air delivered by the air delivery unit during the respective predetermined regeneration period of the respective dishwashing program allows the sorption material of the fixed bed to be regenerated in a more energy-saving or energy-efficient manner than if the air delivery unit for the regeneration phases of different lengths of the different dishwashing programs washroom air would promote only with one and the same, ie always the same delivery volume flow value.
- the domestic dishwasher according to the invention preferably switches to different desorption operating modes or desorption operating modes for the respective regeneration of the sorption material of the fixed bed:
- the various dishwashing programs differ from one another by the regeneration periods of their regeneration phases of different lengths and the different inlet temperatures of the washing chamber air heated by means of the desorption heating device, which are specifically assigned to them and which are conveyed into the fixed bed fill via their inlet cross-sectional area by means of the switched-on air conveying unit during the regeneration phases of different lengths of the various dishwashing programs and flows through the fixed bed fill along its fill height extension in the direction of flow.
- the heating duration preferably corresponds to the duration of the regeneration phase. If necessary, it can even be selected to be shorter than this. For example, to save energy, the heating time compared to the time the regeneration phase towards the end by a fixed for all dishwashing programs, ie always the same remaining time can be shortened, during which the desorption heating device is already switched off and only the washing room air is circulated through the circulating air 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 require different amounts of energy.
- an electric heater in particular an air heater, with a fixed or constant (output) heating output is preferably sufficient, which heats the rinsing room air that is forced through the circulating air duct by means of the air conveyor unit before it enters the fixed bed, viewed in the direction of flow .
- An electric heater that can be controlled and/or regulated in terms of its thermal power output and is therefore more expensive is therefore not required for the desorption of the sorption material.
- the regeneration temperature caused in the sorption material can be varied as a specific function of the respectively specified regeneration period or desired regeneration period of the regeneration phase of the respective dishwashing program.
- the delivery volume flow indicates the volume of air that is moved, ie transported, by the air delivery unit per period of time through the circulating air channel and thus through the fixed bed of the loose, granular or granular, reversibly dehydratable sorption material.
- the air conveying unit is a fan or blower, the speed of which is set by the control logic as a specific function of the respectively specified 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 respectively specified regeneration period of the regeneration phase of the respective dishwashing program so that the volumetric flow rate of the forced air generated by the fan during the respective regeneration period of the regeneration phase of the respective dishwashing program corresponds to the fixed specified or constant heat output of the desorption heating device is applied at least temporarily during the respective regeneration period of the regeneration phase of the respective dishwashing program, causes a regeneration temperature in the fixed bed of the sorption material that is specifically matched to the respective regeneration period of the regeneration phase of the respective dishwashing program. If several dishwashing programs are provided, which differ from one another by their regeneration phases having different lengths of time, the control logic assigns different volume flow rates of the washing chamber air, which are generated by different operating speeds of the fan. In relation to a single dishwashing program, in which the duration of the
- Regeneration period is varied, this changed period of time is assigned in an analogous manner by the control logic, a changed delivery volume flow of the scavenging room air due to 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 delivery volume flow of the air delivery unit to a fixed value in such a way that it is always the same for the regeneration of the loose sorption material of the fixed bed Desired regeneration temperature is equal to or above a limit temperature caused to largely or almost completely expelling the im
- Sorption material bound water leads, but now makes a distinction as to how high the regeneration temperature caused in the sorption material should be as a specific function of the respectively specified regeneration period of the regeneration phase of the respective dishwashing program.
- the control logic does not aim to always bring about the same target regeneration temperature equal to or above a limit temperature, which until the end of the regeneration phase of the respective dishwashing program largely or almost completely expels the im Sorption material bound water leads, but the control logic changes the delivery volume flow of the air delivery unit and thus, at a fixed or constant heating output of the desorption heating device provided for desorption, the regeneration temperature caused in the sorption material in a specific or individual dependence 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 advantageously be adapted specifically or individually to the respective regeneration time duration of the regeneration phase of the respective dishwashing program.
- control logic can set the delivery volume flow of the air delivery 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 caused in the sorption material is lower or lower than the limit regeneration temperature, from which the sorption material largely or almost all of it during the sorption drying phase of a temporally preceding dishwashing program would desorb adsorbed water.
- the amount of water stored in the sorption material during the sorption drying phase of the preceding dishwashing program is not completely desorbed, but only for the most part until a desired minimum residual moisture content or target residual moisture content of water remains (which is greater than the minimum residual moisture content in the sorption material during desorbing with the limit - regeneration temperature is,) which is more energy efficient, ie less thermal energy required as if the sorbent were heated at least to the limit regeneration temperature, from which the sorbent would desorb almost all of the water adsorbed by it.
- the control/monitoring unit of the household dishwasher according to the invention thus advantageously provides in particular at least one energy-saving dishwashing program, when the household dishwasher according to the invention is run in a more energy-efficient operating mode than with other dishwashing programs provided by its control/monitoring unit.
- the control logic changes the delivery volume flow of the air delivery unit for the regeneration phase, preferably in such a way 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 is deliberately achieved of water remains adsorbed by the sorption material, which is now specifically increased compared to the minimum residual moisture quantity adsorbed by the sorption material at the limit regeneration temperature. Expelling this increased minimum residual moisture content from the sorption material would require a disproportionate or disproportionately high amount of thermal energy, which would have to be applied by the desorption heating device by converting a corresponding amount of electrical energy into thermal energy.
- the desorption heating device heats the rinsing room air that is forcibly fed to the sorption material by means of the air conveying unit, using electrical energy.
- the air conveying unit running during the regeneration phase allows only part of the heat energy generated by the desorption heating device to be fed into the washing chamber of the washing compartment of the domestic dishwasher during at least one washing phase, in particular the cleaning phase, of the dishwashing program that follows the sorption drying cycle of the dishwashing program that is being carried out, and used there for the Contribute to heating of the washing chamber or the washing liquid introduced there.
- the heat energy originally generated for desorbing the sorption material by means of the desorption heating device is reduced by that for overcoming the Adsorption binding forces required thermal dissolution energy to absorb the sensible heat that the sorption material absorbs until the target regeneration temperature is reached, and the waste heat losses of the heated sorption material to the environment. If the sorption container with the fixed bed is housed in a base module of the household dishwasher below the washing container, waste heat is lost from the fixed bed of the sorption material to the walls of the sorption container and from there to the air present in the base module and adjacent components of the base module present there.
- control/monitoring unit of the domestic dishwasher provides several
- Dishwashing programs ready whose regeneration phases have different regeneration durations For example, a regeneration period of 20-35 minutes for desorbing the sorption material can be selected for an intensive cleaning program, while in an energy-saving dishwashing program that meets an energy label A of the energy consumption classification scheme valid in the EU from March 1, 2021, a shorter regeneration period between 5 - 15 minutes can be set.
- the desorption heating device which is provided for regenerating the sorption material, is designed as an electric air heater that is provided in the forced air flow direction in the circulating air duct in front of the fixed bed of the sorption material accommodated in the sorption container. Due to the fact that the air flowing through the fixed bed of the loose, grainy or granular, reversibly dehydratable sorption material viewed upstream, before entering the fixed bed, is heated by means of the electric air heater, it is largely ensured that the air flows into the fixed bed at a defined heating temperature.
- the heated air flows through the spaces between the loose grains or granulate particles of the sorption material housed as a fixed bed in the sorption container, it can convey thermal energy or heat energy to the grains or granules of the sorption material in a largely uniform manner and release them to them in a largely uniform manner.
- control logic that sets the delivery volume flow of the air delivery unit for the regeneration phase of the respective dishwashing program is part of the control/monitoring unit that is provided for carrying out the one or more dishwashing programs.
- the control/monitoring unit and/or the control logic are preferably realized by one or more hardware components, which in particular comprise a microcomputer system with an electronic memory system, and/or by software components which are in at least one electronic memory of a computer, in particular a microcomputer system, of the household dishwasher according to the invention are stored, and which contain and implement the sequence of events, i.e. sequence of one or more rinsing steps or rinsing phases and final drying step of the respective dishwashing program.
- the control logic can be a program part or a sub-routine of the sequence procedure of the dishwashing program to be carried out in each case.
- the control/monitoring unit provides at least one energy-saving dishwashing program, when it is carried out by the control/monitoring unit, the control logic shortens the duration of the regeneration phase in comparison to the duration of the regeneration phase of at least one other selectable dishwashing program and at the same time during the regeneration phase of the energy-saving dishwashing program, the delivery volume flow of the air delivery unit is increased in comparison to the delivery volume flow of the air delivery unit specifically assigned to the other dishwashing program.
- the regeneration temperature caused in the sorption material is reduced to a Regeneration temperature reduced, which is lower than the regeneration temperature effected in the other selectable dishwashing program.
- the reduced regeneration temperature is in particular lower than the limit regeneration temperature from 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 limiting regeneration temperature for zeolite(s), in particular zeolite(s) of type A, type Y and/or type 13X, as sorption material is around 280° C. (Celsius).
- control logic when executing 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 duration and at the same time reduces the delivery volume flow of the air delivery unit during the Regeneration phase of the energy-saving dishwashing program is increased in comparison to the regeneration phase of the delivery volume flow of the air conveying unit specifically assigned to the other dishwashing program in such a way that the regeneration temperature caused in the flow inlet-side area of the fixed bed fill in the sorption material is reduced to a reduction regeneration temperature that is lower than that which can be selected for the other Dishwashing program in the area of the fixed bed on the flow inlet side caused regeneration temp in the sorption material temperature, and the regeneration temperature brought about in the sorption material in a fluidically downstream area of the fixed bed, in particular the area assigned to the air outlet or flow outlet of the fixed bed, is raised to an increase regeneration temperature that is greater than that in the other selectable dish
- the inlet temperature of the air flow 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 driven out of the sorption material SM along a first section of the fixed bed on the inlet side, but The expulsion of water from the sorption material in the subsequent section of the fixed bed, viewed in the direction of flow, in particular on the outlet side, is now better than in the case of an air flow 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 washing room air conveyed into the fixed bed is set lower (by correspondingly increasing the conveying volume flow of the air conveying unit), the shorter the duration of the regeneration phase of the respective dishwashing program, in particular energy-saving dishwashing program, is.
- the shorter the duration of the regeneration phase with a fixed predetermined heat output of the desorption heating device the lower the amount of thermal energy that has to be provided by the desorption heating device.
- Regeneration duration for the regeneration phase of the energy-saving dishwashing program less than or equal to 15 minutes, in particular between 5 minutes and 15 minutes sets and at the same time or in addition to the delivery volume flow
- Air delivery unit during the regeneration phase of the energy-saving dishwashing program is increased in such a way that during this short regeneration period of the regeneration phase in the flow inlet-side area of the fixed bed in the sorption material there is 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.
- the desorption heating device can be favorable to use the desorption heating device with the same or constant electrical power and the associated constant thermal output power for the different lengths of regeneration phases of different dishwashing programs, but for at least one more energy-efficient dishwashing program, in particular an energy-saving dishwashing program, the runtime of its To reduce regeneration phase compared to the terms of the regeneration phases of one or more other, less energy-efficient dishwashing programs.
- control/monitoring unit provides at least one energy-saving dishwashing program, when it is carried out, the control logic for reducing the regeneration temperature caused in the sorption material during the regeneration phase operates the air delivery unit with a changed delivery volume flow, which is compared to the delivery volume flow of the air delivery unit during the Regeneration phases of one or more other, less energy-efficient dishwashing programs is increased.
- a fan or blower is preferably provided as the air conveying unit.
- the regeneration temperature in the sorption material can be lowered, which is caused by the force-delivered and heated by means of the desorption heating device scavenging room air in the sorption material.
- the fixed bed fill in such a way in the sorption container is housed and aligned so that it is traversed by the forced air flow generated by the air conveying unit during the regeneration phase and drying phase of the respective dishwashing program in a vertical direction counter to the direction of gravity.
- the fixed bed fill is preferably formed by a fill of loose grains or granulate pieces of a sorption material, which is held in particular between a lower screen grid and an upper screen 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, when it is carried out, the control logic for reducing the inlet temperature of the washing room air heated by means of the desorption heating device, which is fed into the fixed bed during the regeneration phase of the energy-saving dishwashing program by means of the Air delivery unit is conveyed in, and as a result of the regeneration temperature brought about in the sorption material during the regeneration phase, the delivery volume flow of the air delivery unit is increased in such a way (compared to one or more less energy-efficient other dishwashing programs) that the sorption material of the fixed bed bed as a whole during the respectively specified regeneration period of the regeneration phase is only on a regeneration temperature has been reached at which a specifically increased minimum residual moisture content of water between 5 % and 15%, in particular between about 10% and 15%, based on the dry matter of the sorption material remains in this.
- this preferably requires a regeneration temperature of 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 caused in the sorption material during the respectively specified duration of the regeneration phase during the duration of the regeneration phase only releases water from those adsorption binding sites of the sorption material that have a lower average regeneration energy compared to those adsorption binding sites of the sorption material require a disproportionately higher regeneration energy per adsorption volume, i.e. volume of adsorbed water per sorption material dry mass.
- the regeneration is limited to the detachment of adsorbed water only from the adsorption loading places of the sorption material with weaker adsorption binding energy by the targeted reduction of the regeneration temperature caused (compared to the limit regeneration temperature).
- the adsorption loading places of the sorption material with the higher adsorption binding energy are no longer used in a targeted manner. This improves the energy efficiency during desorption or regeneration.
- Household dishwasher with a washing compartment (SR) for receiving items to be washed to be cleaned, with a control/monitoring unit for carrying out one or more dishwashing programs, the respective dishwashing program having one or more rinsing phases during which the items to be cleaned are exposed to rinsing liquid, and one includes a drying phase that concludes the washing program, and with a sorption drying system that
- a circulating air duct arranged outside of the rinsing chamber, which fluidically connects an air outlet of the rinsing chamber with an air inlet of the rinsing chamber
- a sorption container fluidically inserted into the circulating air channel, in which a fixed bed of a granular or granular, reversibly dehydratable sorption material is accommodated
- the drying phase of the dishwashing program to be carried out in each case Forced conveyance of washing room air from the washing room through the sorption container to dehumidify it, and • a desorption heating device with a fixed predetermined heat output, which at least temporarily during a regeneration phase, during which the air conveying unit forces washing room air through the circulating air duct and in at least one washing phase, in particular the cleaning phase , of the respective dishwashing program to be carried out takes place, which heats the washing room air supplied to the sorption material and/or the sorption material by introducing heat energy in such a way that the sorption material desorbs water that has been stored in the sorption material during the drying phase of the preceding dishwashing program, characterized in that a Control logic for the predetermined duration of the regeneration phase of at least one energy-saving dishwashing program the volume flow of the funded by the air conveyor unit rinsing room air in such a way specifically sets that by the regeneration temperature caused in the sorption material of the fixed bed during the specified duration of the
- Regeneration energy per adsorption volume i.e. volume of adsorbed water per sorption material dry mass, has to be expended.
- Household dishwasher with a washing compartment (SR) for receiving items to be washed to be cleaned, with a control/monitoring unit for carrying out one or more dishwashing programs, the respective dishwashing program having one or more rinsing phases during which the items to be washed to be cleaned with Rinsing liquid are applied, and a Neillprogrammfinalende
- a circulating air duct arranged outside of the rinsing chamber, which fluidically connects an air outlet of the rinsing chamber with an air inlet of the rinsing chamber
- a sorption container fluidically inserted into the circulating air channel, in which a fixed bed of a granular or granular, reversibly dehydratable sorption material is accommodated
- an air conveying unit fluidically inserted into the circulating air duct, which forcibly conveys warm, humid washing room air out of the washing room to dehumidify it through the sorption container at least during a period of time, in particular an initial period of time, of the drying phase of the respective dishwashing program to be carried out, and
- a desorption heating device with a fixed predetermined heat output which at least temporarily during a regeneration phase, during which the air conveying unit forces washing room air through the circulating air duct and which takes place in at least one washing phase, in particular the cleaning phase, of the respective dishwashing program to be carried out, the washing room air supplied to the sorption material and /or heats the sorption material with the introduction of thermal energy in such a way that the sorption material desorbs water that has been stored in the sorption material during the drying phase of the preceding dishwashing program, characterized in that a control logic for the specified duration of the regeneration phase of at least one energy-saving dishwashing program Delivery volume flow of the sponsored by the air delivery unit scavenging air adjusts so specifically that the sorption material of the fixed bed fill during the respective given level regeneration period of Regeneration phase is only brought to a regeneration temperature at which an increased minimum residual moisture content of water between 5% and 15%, in particular between 10% and 15%, based on the total dry matter of the sorption material remains in this.
- adsorption bonds that 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 type A, type Y, and/or type 13X. Not dissolving, ie maintaining these strong adsorption bonds, a disproportionately high thermal energy expenditure required for their dissolution and, consequently, a correspondingly disproportionately high amount of electrical energy for the operation of the desorption heating device, in particular electrical desorption heating device, can be saved.
- the targeted restriction of regeneration to these weaker adsorption binding sites means that the required expenditure of thermal regeneration energy is preferably between 10% and 30% lower than the total expenditure of thermal regeneration energy for the complete desorption of the water molecules from all, i.e. weak and strong adsorption binding sites would be required, and yet the amount of water expelled from the adsorption binding sites with weak binding energy from the sorption material is sufficiently large for the sorption material to be sufficiently desorbed for the drying phase that concludes the washing program in order to remove the amount of moisture present on the items to be washed after the last liquid-carrying partial washing phase, in particular the final rinsing phase to be able to adsorb the warm, humid washing room air that is forcibly conveyed through the fixed bed filling of the sorption material by means of the air conveying unit.
- the amount of water that can be expelled from the adsorption binding sites with weak binding energy from the sorption material between 40% and 80% of the total amount of water that can be expelled in the case of almost complete
- the invention also relates to a method for operating a domestic dishwasher designed according to the invention, in particular according to claim 14.
- the invention relates to a method for carrying out at least one energy-saving dishwashing program in a household dishwasher which has a sorption drying system, according to claims 15, 16.
- FIG. 1 shows a schematic representation of an advantageous exemplary embodiment of a household dishwasher designed according to the invention with a sorption drying system whose sorption material is regenerated according to the principle according to the invention when one or more dishwashing programs are carried out, in particular at least one energy-saving dishwashing program,
- Figure 2 is a schematic representation of a characteristic curve preferably for zeolite (s) of type A, type Y and / or type 13X as sorption material, which indicates the regeneration energy per adsorption volume, ie volume of adsorbed water per sorption material dry matter, for dissolving Water is expended from the adsorption binding sites of the sorption material, as well as an advantageous working range below this characteristic curve for the regeneration mode according to the invention of at least one dishwashing program, in particular the energy-saving dishwashing program
- Figure 3 shows a schematic representation of the through-flow extension, in particular height extension, of a fixed bed of loose sorption material, which is accommodated in a sorption container of the sorption drying system of the domestic dishwasher of Figure 1, the local courses of the regeneration temperatures caused in the sorption material at the same specified
- Regeneration time for two differently high inlet temperatures of a washing chamber air flow which is conveyed by means of an air conveying unit of the sorption drying system out of the washing chamber of the domestic dishwasher from Figure 1 into the circulating air channel of its sorption drying system and is forcibly conveyed through the fixed bed of the loose sorption material and before it flows into the fixed bed by means of a desorption - Heating device is heated, and
- FIG. 4 shows a schematic representation of the various phases of an energy-saving dishwashing program according to the invention of the household dishwasher from FIG. 4
- Regeneration temperature is reduced by increasing the delivery volume flow of the rinsing room air delivered into the fixed bed.
- FIG. 1 shows a schematic representation of an exemplary domestic dishwasher GS with a sorption drying system SY, the sorption material of which is regenerated when carrying out one or more dishwashing programs, in particular at least one energy-saving dishwashing program, according to the principle according to the invention.
- SY sorption drying system
- FIG. 1 only those components of the domestic dishwasher GS which are necessary for understanding the invention are provided with reference numbers and explained. It goes without saying that the domestic dishwasher GS can include other parts and assemblies.
- the domestic dishwasher GS has a washing compartment SR for accommodating items to be cleaned.
- the rinsing space SR is delimited by the walls of an approximately cuboid rinsing container SB and by a door, in particular a front door, that closes the loading opening, in particular at the front. This is omitted in the schematic front view of FIG. 1 for the sake of graphic simplicity.
- the boundary walls of the washing tub SB are in particular a left-hand side wall, a right-hand side wall, a top wall, a bottom wall and a rear wall.
- One or more receiving units in particular a lower crockery basket, an upper crockery basket and/or a cutlery drawer preferably arranged above the upper crockery basket, are provided in the washing chamber SR for accommodating the washware items to be cleaned.
- the latter is omitted in FIG. 1 for the sake of clarity in the drawing or for reasons of space.
- One or more spray devices or other liquid distribution devices are provided in the washing chamber SR to apply washing liquid to the items to be washed that are placed in the receiving units.
- These can be, in particular, rotatable spray arms, an upper roof spray, and/or other liquid application means such as spray units specially attached to the one or more crockery baskets.
- a lower and an upper rotatable spray arm SV are shown in the washing chamber SR as representative of the liquid application means, and a lower crockery basket UB and an upper crockery basket OB represent the receiving units for storing the items to be cleaned.
- a lower crockery basket UB and an upper crockery basket OB represent the receiving units for storing the items to be cleaned.
- washing liquid is let into the washing chamber SR by means of a water inlet system omitted in FIG. 1 for the sake of graphic simplicity.
- the rinsing liquid is pumped by a circulating pump UP via one or more liquid lines VL to the spray devices or liquid distribution devices such as SV and sprayed by them onto the items to be cleaned in the receiving units.
- the rinsing liquid drips onto the floor and collects in a pump sump or pump well PS, which is provided below the bottom wall of the rinsing container SB.
- the circulating pump UP sucks the rinsing liquid out of the pump sump PS, preferably via an intake port, 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 include other components, such as a water diverter for selectively controlling 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 the liquid circulation circuit, in order to be able to heat the rinsing liquid to a desired heating temperature or desired heating temperature if required.
- the liquid heater WH is preferably associated with the circulating pump UP.
- the liquid heater is housed within the circulating pump, ie the circulating pump UP is preferably designed as a heating pump.
- the sorption drying system SY has a circulating air duct UK arranged outside of the washing compartment SR.
- This circulating air duct ÜK fluidly connects an air outlet AL of the rinsing chamber SR with an air inlet EL of the rinsing chamber SR.
- the air outlet AL can be a through-opening in a side wall—as here in the exemplary embodiment in FIG 1 in the bottom wall of the rinsing tank SB - be provided.
- a sorption container SOB is fluidly inserted into the recirculation channel UK. It contains a fixed bed FS of a loose, granular or granular, reversibly dehydratable sorption material SM. Preferably, this can be spherical.
- the bed of loose grains and/or granulate pieces of the sorption material is preferably held between a lower screen mesh US and an upper screen mesh OS of the fixed bed fill FS. Viewed in the vertical direction, the bed has a predetermined maximum or upper bed height SH.
- the fixed bed fill FS of the sorption material SM is accommodated in the sorption container SOB in such a way that it is caused by a forced air flow, which can be generated by means of an air conveying unit LF fluidically inserted into the circulating air duct (UK), from bottom to top, in particular essentially in a vertical direction counter to the direction of gravity. can be flowed through.
- a first air duct section LK1 of the recirculation duct UK runs between the air outlet AL of the washing compartment SR and the air inlet El of the sorption container SOB.
- the air conveying unit LF is preferably inserted fluidically into this.
- the air conveying unit LF is thus preferably fluidically inserted between the air outlet AL of the washing room SR and the air inlet El of the sorption container SOB in front of the sorption container SOB in the circulating air duct ÜK, viewed in the direction of flow of the forced-conveyed washing room air.
- the air conveying unit LF is expediently formed by a fan or a blower.
- washing room air via the air inlet El of the sorption container SB through the fixed bed of the loose, granular or granular, reversibly dehydratable sorption material SM from bottom to top, in particular essentially in the vertical direction against the direction of gravity.
- the washing room air that is forced through the fixed bed filling FS leaves the sorption container SOB via an air outlet AU and is fed either directly or, as here in the exemplary embodiment from Figure 1, via a second air duct section LK2 of the air circulation duct UK into the air inlet EL of the Rinse chamber SR funded.
- the air conveying unit LF If the air conveying unit LF is switched on, it sucks air from the rinsing chamber SR via its air outlet AL into the air circulation duct UK and then blows it through the fixed bed of loose, granular or granular, reversibly dehydratable sorption material SM of the sorption container SOB and then through the air inlet EL back into the washroom SR.
- air from the scavenging chamber ie scavenging chamber air
- the household dishwasher GS includes a control/monitoring unit CO for carrying out one or more dishwashing programs.
- the respective dishwashing program has one or more washing phases, during which the items to be cleaned in the washing chamber are exposed to washing liquid by means of one or more spray devices or liquid distribution devices, and a drying phase that concludes the washing program. It preferably includes a pre-rinse phase, a cleaning phase, an intermediate rinse phase and a final-rinse phase as liquid-carrying rinse phases or rinse steps, one after the other.
- Figure 4 illustrates the timing of these washing phases, namely the pre-washing phase VP, the cleaning phase RP, the intermediate washing phase ZP and the rinsing phase KP, and the drying phase TP that concludes the washing program, each as an example for two different dishwashing programs GP, EP in detail.
- the time t in seconds (abbreviated with sec) is plotted along the abscissa
- the temperature SRT in degrees Celsius (abbreviated with °C) of the temperature in the washing compartment SR is plotted along the ordinate, which corresponds to the temperature of the respective washing liquid and/or air temperature in the washing compartment SR corresponds.
- the curve of the washing chamber temperature for the energy-saving dishwashing program EP is denoted by TSR
- the curve of the washing chamber temperature for the dishwashing program GP is denoted by TSR ' .
- the temperature profile curve TSR ' of the dishwashing program GP deviates from the temperature profile curve TSR of the energy-saving dishwashing program EP.
- the section of the temperature profile curve TSR ' assigned to the cleaning phase RP is drawn in dotted lines. Otherwise, for the sake of simplicity, the remaining sections VP, ZP, KP, TP of the two temperature profile curves TSR, TSR ′ in the exemplary embodiment roughly correspond to one another.
- fresh water at line temperature from a fresh water supply line and/or fresh water and/or service water preferably stored in a storage reservoir at about room temperature UT is fed into the washing cabinet SR for the pre-rinse phase VP admitted and pumped during this pre-rinse step by means of the running circulation pump UP to the spray devices or liquid distribution devices such as SV and sprayed by them onto the items to be washed or applied in some other way.
- the rinsing liquid is partially or completely pumped out.
- a drain pump is preferably provided, which has been omitted in FIG. 1 for the sake of graphic simplicity.
- the drain pump pumps some or all of the washing liquid out of the pump sump PS and conveys it out of the domestic dishwasher GS via a drain line.
- the pre-rinsing step VP ends at the point in time tVE.
- fresh water from the fresh water supply line and/or fresh water stored in a storage reservoir and/or process water is admitted via the water inlet system (not shown) into the dishwashing area SR for the cleaning phase RP and during the preferably specified period 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 ' to time tHE or tHE ' heated.
- the washing liquid for the cleaning step or the cleaning phase RP is preferably already circulated during the water inlet and heating up by the circulation pump UP in the liquid circulation circuit and sprayed onto the items to be cleaned by means of its spray devices or liquid application devices such as SV.
- the rinsing liquid for the cleaning phase RP is preferably dosed with a cleaning agent. After the required cleaning temperature RT or RT ' has been reached at the point in time tHE or tHE ' , the heating of the rinsing liquid is terminated. There follows a so-called post-wash phase NWP or NWP ' , during which the rinsing liquid by means of the running circulation pump UP in the liquid circuit only circulated and by means of the spray devices or
- Liquid application devices SV is applied to the items to be washed to be cleaned, but is no longer actively heated either by the deorption heating device HV or the washing liquid heater WH.
- the cleaning liquid is partially or completely pumped out of the washing chamber SR by means of the drain pump, which is not shown.
- fresh water from the fresh water line and/or fresh water stored in the storage reservoir and/or process water for a subsequent intermediate rinsing step ZP is then admitted into the rinsing chamber SR by means of the water inlet system.
- This rinsing liquid is in turn distributed in the rinsing space SR by means of the spray devices or liquid distribution devices such as SV.
- the water heater WH usually remains switched off for this intermediate rinsing phase ZP.
- the rinsing liquid used for the intermediate rinsing is again partially or completely pumped out of the rinsing chamber SR by means of the drain pump.
- Rinsing agent is preferably metered into this fresh water and/or process water for rinsing.
- the washing 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 washed in circulation mode.
- the final-rinse liquid can optionally also be heated to a required maximum final-rinse water temperature KT by means of the water heater WH.
- the final-rinse liquor liquid is pumped out of the washing compartment SR as completely as possible by means of a drain pump.
- a drain pump In the exemplary embodiment in FIG.
- the final-rinse phase KP then ends at the point in time tKE.
- the drying phase TP that concludes the washing program follows, which ends after a preferably predetermined period of time at the time tTE.
- the air conveying unit LF is switched on.
- warm, humid dishwashing room air PL is sucked from the dishwashing room SR into the circulating air duct UK and blown through the fixed bed fill FS of the loose, grainy or granular, reversibly dehydratable sorption material SM to dehumidify it.
- the sorption material SM adsorbs water molecules from the warm, humid washing room air PL, so that the air that leaves the fixed bed filling FS on the outlet side and is blown into the washing room SR is drier than the warm, humid washing room air PL that is forced to the air inlet El of the sorption container SOB.
- This dried air leaving the sorption container SB via its air outlet AU and returned to the washing compartment SR is denoted by TL in FIG. Due to the continued circulation of the warm, humid dishwashing room air PL through the fixed bed fill FS of the sorption material SM, the dishwashing room air in the dishwashing room SR and the items of wash ware accommodated there become ever drier 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 items to be washed can be largely or completely adsorbed by the sorption material SM during the drying phase TP.
- additional heating of the final-rinse liquid during the final-rinse phase KP can be partially or completely dispensed with.
- the final-rinse temperature KT to which the final-rinse liquid has hitherto usually been heated up to the end of the final-rinse phase KP in a household dishwasher without a sorption drying system, can preferably be lowered in the household dishwasher with a sorption drying system according to the invention.
- condensation drying or inherent heat drying which is based on a sufficiently large temperature difference between the items to be washed and the boundary walls of the washing chamber SR, is now no longer required as much or not at all.
- the items to be washed in the washing compartment SR are now mainly dried during the drying phase by means of the sorption drying system in that the washing compartment air PL, which is present in the washing compartment SR after the last liquid-carrying washing phase, in particular the final rinse phase, is forced to circulate through the circulating air duct UK by means of the air conveying unit LF moisture, ie water molecules, are removed from the sorption material SM of the fixed bed fill FS by adsorption.
- Washing liquid heating or water heating WH would have to be applied in at least one of the preceding washing phases, in particular in the final rinsing phase KP as the last liquid-carrying washing phase, to heat the washing liquid, in particular final rinsing liquid, to a sufficiently high temperature, in particular the required final rinsing temperature or target final rinsing temperature KT.
- a desorption heating device HV is assigned, which at least temporarily heats the sorption material SM during the duration such as RD, KRD of the regeneration phase such as RG, KRG.
- the desorption heating device HV in contrast to the air delivery unit LF, which preferably during the entire duration of the regeneration phase forcibly delivers air PL ' from the washing chamber through the sorption material SM, is switched on and operated parallel to the air delivery unit, but already a fixed time for all dishwashing programs, ie always the same run-on period, is switched off before the end of the regeneration phase.
- This mode of operation of desorption heating device and air delivery unit saves electrical energy compared to an operating mode in which the desorption heating device and the air conveying unit are switched on at the same time as the start of the regeneration phase and are only switched off at the same time at the end of the regeneration phase.
- the air conveying unit LF is preferably switched on continuously, so that air PL ' is continuously forced out of the washing chamber SR through the circulating air channel 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 circulating air duct UK in front of the inlet-side end face of the fixed bed FS when viewed in the forced air flow direction ZLS.
- the desorption heating device HV is located here in the exemplary embodiment of FIG. 1, in particular in an anteroom of the sorption container SOB, which is arranged below the lower screen mesh US of the fixed bed fill FS.
- the air heated by the desorption heating device HV flows largely uniformly through the interstices between the loose grains or granulate particles of the sorption material SM in relation to the subsequent passage cross-sectional areas of the fixed bed at the various points of its height extension HS.
- This transfers thermal energy or heat energy to the grains or the granules of the sorption material SM, which are arranged in the respective passage cross-sectional area of the fixed bed fill FS, largely uniformly.
- the regeneration phase such as RG, KRG is during a liquid-carrying rinsing phase, preferably during a heating phase such as HP, HP ' a rinsing phase with rinsing liquid to be heated, preferably the cleaning phase such as RP, des respectively currently running dishwashing program such as GP, EP carried out (see Figure 4).
- the respective dishwashing program in which the sorption drying system SY is used to dry the items to be washed during the drying phase that concludes the program, such as TP, the regeneration phase is carried out during at least one washing phase carrying washing liquid before the final drying phase TP, so that the Sorption material is sufficiently regenerated.
- the heating phase such as HP, HP ' of the cleaning phase such as RP is preferably made up of at least two partial heating sections that follow one another in time:
- 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 time segment, in particular an initial time segment, of the heating-up phase, such as HP, HP ' . It is preferably immediately followed by a second time segment such as PW, KPW, for example, during which the washing liquid heater or water heater WZ continues to heat the washing liquid up to a desired target temperature to be reached, such as the cleaning temperature RT or RT '.
- the air conveying unit LF is in operation in order to suck in air PL ' from the scavenging chamber SR and blow it through the fixed bed FS of loose sorption material SM via the circulating air duct UK and return it to the scavenging chamber SR via the air inlet EL .
- the air delivery unit LF is activated, i.e.
- the desorption heating device HV heats the scavenging room air PL ' , which is forcibly supplied to the sorption material SM by means of the air delivery unit LF, at least temporarily with the introduction of Heat energy such that the sorption material SM water that has been stored in the sorption material SM during the drying phase TP of the preceding dishwashing program is sufficiently desorbed for the drying phase TP to be carried out later in the dishwashing program currently being carried out.
- a portion 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 scavenging chamber SR.
- This part of the heat energy generated by the desorption heating device HV can thus be used to heat up the heat present in the washing compartment SR Contribute to the washing liquid, the air in the washing room present there and/or the parts to be washed.
- the rinsing liquid heater WH which is preferably switched on and operated later than the desorption heating device HV provided for regenerating the sorption material, requires less electrical energy to heat the rinsing liquid to a required minimum temperature such as RT during the cleaning step RP.
- a control logic LO adjusts the delivery volume flow FV of the air delivery 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 Sorption material SM causes regeneration temperature TR depending on the specified regeneration time or target regeneration time such as RD, KRD of the regeneration phase such as RG, KRG of the respective dishwashing program such as GP, EP is varied. In this way, dishwashing programs with different energy-consuming regeneration phases can be provided.
- the GS domestic dishwasher is therefore able to switch to different operating modes or operating modes when carrying out its various dishwashing programs such as energy-saving washing program, intensive cleaning program, hot cleaning program, glass washing, short program, night washing program, extra drying, etc their regeneration phases and these specifically assigned, different target regeneration temperatures differ from each other.
- various dishwashing programs such as energy-saving washing program, intensive cleaning program, hot cleaning program, glass washing, short program, night washing program, extra drying, etc their regeneration phases and these specifically assigned, different target regeneration temperatures differ from each other.
- FIG. 4 shows schematically that the regeneration phases RG, KRG of the two exemplary dishwashing programs GP, EP have regeneration periods RD, KRD of different lengths.
- the regeneration period KRD of the dishwashing program EP is selected to be shorter than the regeneration period RD of the other dishwashing program GP, ie KRD ⁇ RD applies.
- the regeneration phase KRG of the energy-saving dishwashing program EP ends chronologically earlier at time tKRE, while the regeneration phase RG of the dishwashing program GP only ends chronologically later at the time tRE (> tKRE) is over.
- the control logic LO is expediently a component of the control/monitoring unit CO, which is provided for carrying out the various dishwashing programs.
- the control/monitoring unit CO and/or the control logic LO are preferably realized by one or more hardware components, which in particular comprise a microcomputer system with an electronic memory system, and/or software components which are stored in at least one electronic memory of a computer, in particular a microcomputer system, of the domestic dishwasher GS are stored, and which contain and implement the sequence of events, i.e. sequence of one or more rinsing steps or rinsing phases and final drying step of the respective dishwashing program.
- the control logic LO can be a program part or a sub-routine of the sequence procedure of the respective dishwashing program to be carried out, such as GP, EP, for example.
- control logic LO When carrying out the regeneration phase, e.g. RG, KRG, the control logic LO provides the various
- Regeneration phase such as RG, KRG of the respective dishwashing program such as GP, EP (see Figure 4) should be.
- Regeneration phases RG, KRG of the various dishwashing programs such as GP, EP therefore do not set the control logic LO to always effect the same target
- Regeneration temperature TR is equal to or above a limit temperature which, by the end of the regeneration phase such as RG, KRG of the respective dishwashing program such as GP, EP, leads to the largely complete expulsion of the water adsorbed by the sorption material, but the control logic LO changes the delivery volume flow of the air delivery unit LF and accompanied by the Sorption material SM each effected regeneration temperature RT in specific or individual dependence 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 advantageously be adapted specifically or individually to the respective regeneration period of the regeneration phase of the respective dishwashing program.
- control logic LO can set the delivery volume flow of the air delivery 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 in such a way that the regeneration temperature TR caused in the sorption material SM is lower or lower than is the limiting regeneration temperature from 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 specifically increased minimum residual moisture quantity or target residual moisture quantity GW (see Figure 2) remains of water, what is more energy efficient, i.e. requires less thermal energy than if the sorption material SM were to be heated at least to the limit regeneration temperature, from which the sorption material SM consumes the total te water adsorbed by it would almost completely desorb.
- Zeolite(s) of type A and/or type Y and/or type 13X is or are preferably provided as the sorption material.
- the control/monitoring unit CO of the household dishwasher GS thus preferably provides at least one energy-saving dishwashing program such as EP (see FIG. 4), when it is carried out, the domestic dishwasher GS is in a more energy-efficient regeneration operating mode than with other dishwashing programs provided by its control/monitoring unit such as GP is operated.
- the characteristic curve CK indicates the regeneration energy RE in kilojoules per kilogram (abbreviated kJ/kg), which per adsorption volume W in cubic centimeters per gram (abbreviated cm 3 /g), ie volume of adsorbed water per sorption material dry mass, for detaching water molecules from the Adsorption binding sites of the sorption material SM is to be expended.
- the adsorption volume W is plotted along the abscissa and the associated regeneration energy RE is plotted along the ordinate.
- the vaporization enthalpy which is to be applied during the regeneration phase by the desorption heating device when expelling the water adsorbed in and/or on the sorption material into the gas phase, is omitted.
- the regeneration energy RE plotted along the ordinate thus essentially comprises the adsorption binding energy required to detach the water molecules from the Sorption material is to be applied, and in addition 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 by heating it by means of the desorption heating device.
- the adsorption volume W corresponds to a percentage (abbreviated %) of residual moisture that remains in the sorption material SM for the regeneration energy RE used in each case.
- 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 to be expended, which is at least required to almost completely dry the total amount of sorption material, starting from its maximum saturation with water.
- the first curve section CK1 runs much flatter and lower than the second curve section CK2.
- the boundary between the two curve sections CK1, CK2 is identified by a dash-dotted vertical line and designated GW.
- adsorption volume value - here in the embodiment of Figure 2 of W 0.05 cm 3 / g - or corresponding to that minimum residual moisture value - here in the embodiment of about 5% - at which the need for regeneration energy RE to further reduce the the amount of water remaining in the sorption material SM increases disproportionately or disproportionately.
- Minimum residual moisture value GW 5% must be applied in total.
- the working area below the first curve section CK1, which is flatter and lower than the second curve section CK2, is denoted by AB.
- the total area below the lower and flatter, first curve section CK1 and the second, steeply rising and higher curve section CK2 corresponds to the total regeneration energy RE to be applied in order to dry the sorption material SM from the saturation value SW from around 25% here to a residual moisture value of 0% be able.
- This total area below the first curve section CK1 and the second curve section CK2, which rises disproportionately steeply, is denoted by UB.
- the first curve section CK1 is associated with an average regeneration energy mRE--here of approximately 750 kJ/kg--which is significantly smaller than the average regeneration energy mRE ' --here of approximately 1050 kJ/kg--which is associated with the overall curve CK.
- control logic LO preferably ensures that when at least one energy-saving dishwashing program such as EP is carried out the regeneration temperature RT caused in the sorption material SM during the respectively specified duration such as KRD of the regeneration phase such as KRG during the duration of the regeneration phase, water molecules are only detached from those adsorption binding sites of the sorption material that have a lower average regeneration energy such as mRE compared to those adsorption binding sites of the sorption material require, for which a disproportionately higher regeneration energy per adsorption volume, ie volume of adsorbed water per sorption material dry mass, is to be expended.
- at least one energy-saving dishwashing program such as EP is carried out the regeneration temperature RT caused in the sorption material SM during the respectively specified duration such as KRD of the regeneration phase such as KRG during the duration of the regeneration phase
- the regeneration is limited to the detachment of adsorbed water only from the adsorption binding sites of the sorption material with weaker adsorption binding energy by the targeted reduction of the regeneration temperature caused compared to the limit regeneration temperature.
- the adsorption binding sites of the sorption material with, in contrast, higher adsorption binding energy are no longer used specifically for the regeneration of the sorption material. This improves the energy efficiency during desorption or regeneration, ie a lower total amount of thermal energy has to be expended in order to expel a desired volume of adsorbed water per sorption material dry matter from this.
- the control logic LO can increase the delivery volume flow or air throughput of the air delivery unit LF during the regeneration phase RG with a constant or fixed predetermined heating output HL of the desorption heating device HV.
- the control logic LO which is preferably a component of the control and monitoring unit CO, preferably sends at least one control signal SLD to the air conveying unit LF via a control line SL1.
- a household dishwasher with a width of 60 cm and a sorption material mass, in particular zeolite mass, of around 1.3 kg and a fixed predetermined heating capacity HL of the desorption heating device HV of around 1450 W, it is favorable to increase the volume flow for the air delivery unit LF in such a way that that this is between 30 - 35 m 3 /h for the regeneration phase. This means that around 160 g of water can be desorbed with improved energy efficiency.
- a desorption heating device which preferably provides the same, predetermined or constant electrical heating power for heating the air PL ′ forcedly conveyed by means of the air conveyor unit LF for the regeneration phases of different dishwashing programs
- one or more energy-efficient dishwashing programs can be implemented for the implementation .
- energy-saving dishwashing programs (which are provided by the control / monitoring unit in particular in addition to other, less energy-efficient dishwashing programs) be favorable to reduce the duration of the regeneration phase of the respective more energy-efficient dishwashing program compared to the regeneration phase of another, less energy-efficient dishwashing program and to match additionally the respective. reduce regeneration temperature.
- 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 period and the given electrical power HL of the desorption heating device HV.
- FIG. 3 shows a schematic representation of the curves TRH, TRN of the regeneration temperatures TR in degrees Celsius (abbreviated to: °C), based on the total mass of the loose sorption material in the fixed bed, in relation to the above-mentioned, preferably provided zeolite types at the different height positions HS (in meters (abbreviated: m)) of the height extension up to the defined bulk height SH of the fixed bed fill FS of the sorption material SM with the same specified short regeneration time KRD, e.g.
- the two different inlet temperatures ETH, ETN are each lower than the limit temperature of about 280° C. for zeolite(s) of type A, type Y and/or type 13X, which lead to the largely complete expulsion of the water adsorbed by the sorption material would.
- the temperature of the rinsing room air flow PL ' at which it enters the fixed bed FS of the sorption material SM can be adjusted according to the principle according to the invention by changing the delivery volume flow of the air delivery unit LF.
- the air conveying unit LF is preferably designed as a fan, the conveying volume flow FV caused by it can be set in a targeted manner by changing its speed.
- the speed of the fan is denoted by LD in FIG.
- An increase in the fan speed LD leads to an increase in the delivery volume flow FV of air PL ′ caused by the fan, while a reduction in speed causes a reduction in the delivery volume flow FV of air PL ′ caused by the fan.
- the control unit LO sends at least one corresponding control signal SLD to the fan via the control line SL1.
- the total fill height SH of the fixed bed fill FS is here im 3 about 0.06 m.
- the temperature curve designated as TRH then occurs for the predetermined short regeneration period KRD—in this case approximately 10 minutes.
- KRD the predetermined short regeneration period
- an approximately constant regeneration temperature is brought about in the sorption material SM, which corresponds to the inlet temperature ETH of approximately 250°C.
- This first section of the temperature curve TRH is labeled TRH ' in FIG.
- 05 m is the case where the temperature TR caused in the sorption material falls to 100 °C and below.
- HS height position
- TR 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.
- control/monitoring unit CO of the domestic dishwasher GS provides at least one energy-saving dishwashing program such as EP (see Figure 4), when the control/monitoring unit executes it, the control logic LO determines the duration of the regeneration phase such as KRG compared to other implemented less energy efficient ones
- Dishwashing programs such as e.g. GP shortened to a short regeneration period such as e.g. KRD and at the same time caused the sorption material SM
- Regeneration temperature TR reduced compared to other selectable, less energy-efficient dishwashing programs such as GP to a reduction regeneration temperature, i.e. reduced regeneration temperature, such as ETN.
- Reduced regeneration temperature means a regeneration temperature that is lower than the limit regeneration temperature from 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.
- suitable for sorption drying adsorption materials such as preferably zeolite (s) of type A, and / or type Y, and / or type 13X if the
- Regeneration phase of the energy-saving dishwashing program such as EP between 5 minutes and 15 minutes and the delivery volume flow of the air delivery unit LF for the Regeneration phase of the energy-saving dishwashing program is set in such a way that during the short regeneration period of the regeneration phase in the sorption material SM a reduction regeneration temperature of at least 120 °C and at most 200 °C, in particular at least 120 °C and at most 150 °, is lower than the limit regeneration temperature C, is effected.
- a fan or a 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 can be ensured in a simple manner by increasing the speed of the fan or blower, with which the force-conveyed air PL ' enters the fixed bed FS.
- the lowering of the inlet temperature of the rinsing room air flow PL ' , which is conveyed into the fixed bed fill FS, below the limit regeneration temperature or limit temperature at which almost complete desorption of the sorption material SM would be possible, is accompanied by an increased minimum residual moisture content, in particular between at least 5% and at most 15%, preferably when using zeolite(s) of type X, type Y, and/or type 13X, remains in the sorption material SM.
- the temperature profile curve TRN shows as an example and in simplified form
- the heat front emerging from the inlet of the fixed bed during the specified short regeneration period KRD in the sorption material SM which is carried along by the air flow PL ' and has the level of its inlet temperature, further or ideally all the way to advance to the outlet end of the fixed bed fill FS and release water molecules from the adsorption bonds on the sorption material.
- FIG. 4 illustrates the various liquid-carrying or water-carrying washing phases VP, RP, ZP, KP and the final drying phase TP of both the energy-saving dishwashing program EP and the dishwashing program GP, which is less energy-efficient than this.
- the duration KRD of its regeneration phase KRG is shortened in comparison to the duration RD of the regeneration phase RG of the dishwashing program GP, ie KRD ⁇ RD applies.
- the energy-saving dishwashing program is included at the same time the regeneration temperature TR brought about in the sorption material during its shorter regeneration phase KRG is reduced in comparison to the regeneration temperature generated during the longer regeneration phase RG of the dishwashing program GP.
- the delivery volume flow FV of the washing room air PL forcedly conveyed through the fixed bed filling FS by means of the air delivery unit LF during the regeneration phase KRG of the energy-saving dishwashing program EP is compared to the delivery volume flow of the washing room air PL forced delivery through the fixed bed filling FS by means of the air delivery unit LF during the regeneration phase RG of the dishwashing program GP ' increased.
- the desorption heating device HV works during the regeneration phases KRG, RG of these two programs EP, GP with the same or approximately constant thermal output. An electronic power control is then not required for the desorption heating device HV.
- the heating-up 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 ' forcedly conveyed 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 washing liquid heating phase KPW, PW together, during which only the water heater WH (with the desorption heating device HV switched off) heats the washing liquid - here in the cleaning step the cleaning liquid - in the circulation circuit or washing liquid distribution circuit of the domestic dishwasher GS that includes the circulation pump UP .
- a desorption heating phase KRG, RG during which the air PL ' forcedly conveyed 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 washing liquid heating phase KPW, PW together, during which only the water heater WH (with the desorption heating device HV switched off) heats the washing liquid
- the approximately linear temperature profile resulting in the rinsing chamber SR during the short regeneration phase KRG is denoted by KTR
- the approximately linear temperature profile resulting in the rinsing chamber SR during the heating phase of the liquid heater WH is denoted by 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-up phase HP ' of its cleaning phase RP from the start time tRS to the time tRE.
- this regeneration phase RG is followed by the partial heating phase PW of the cleaning liquid by means of the water heater WH, until the washing chamber SR or the washing liquid and/or washing chamber air present there has reached the required cleaning temperature or setpoint Cleaning temperature RT ' is heated, which is reached at time tHE ' (>tHE).
- VTR the approximately linear temperature profile that results in the dishwashing cabinet SR during the regeneration phase RG of the less energy-efficient dishwashing program GP
- VTW approximately linear temperature profile that is generated for the dishwashing program GP in the dishwashing cabinet SR during the heating phase of the liquid heater WH.
- Both temperature profile sections VTR, VTW are each drawn in with dash-dotted lines.
- the progression section VTR of the dishwashing program GP continues the progression section KTR of the energy-saving dishwashing program EP with its increase in time, since the desorption heating device HV works with the same constant heating power in the regeneration phases KRG, RG of the two programs EP, GP.
- the temperature curve in the washing compartment SR during the longer regeneration phase RG of the dishwashing program GP is denoted by VTR, and the temperature curve in the washing compartment SR during the heating phase PW of the liquid heater WH is denoted by VTW.
- the required target washing chamber temperature RT ' RT at Dishwashing program GP by heating up the dishwashing liquid using the water heater WH somewhat later than in the energy-saving dishwashing program XP achieved.
- the regeneration phase RG of the dishwashing program GP is accompanied by an approximately rectilinear course section VTR of the temperature SRT in the washing chamber SR, which is drawn in dash-dotted lines in FIG , continues with its increase in time, since the desorption heating device HV in the regeneration phases KRG, RG of the two programs EP, GP each works with the same constant heating power HL.
- the washing liquid used for the cleaning cycle RP to the washing liquid heater WH than indirectly via the liquid generated for regeneration and to heat by the desorption heating device HV heated forced air flow.
- the regeneration temperature in the sorption material is lowered or reduced in the energy-saving dishwashing program EP, as explained in detail above. This means that the fixed bed fill of the sorption material is heated less and absorbs less sensible heat and loses less waste heat to the environment unused.
- the air conveying unit LF has an additional air outlet to the environment. This is shown in broken lines in FIG. 1 and is denoted by AG. It can be opened and closed by means of the control/monitoring unit CO via a control line SL3 using at least one control signal SLA.
- the additional air outlet AG is expediently only opened during the drying phase of the respective dishwashing program.
- An additional amount of exhaust air ALU can then be blown out of the rinsing chamber SR into the environment through the additional outlet AG, as a result of which a negative pressure is established in the rinsing chamber SR.
- ambient air UL is sucked in through an inlet opening, such as an expansion opening in a wall of the washing compartment, into the washing chamber SR.
- an inlet opening for ambient air is additionally drawn in with a dot-dash line and is denoted by EO.
- the washing chamber air PL is mixed with the ambient air in the washing chamber, which is drier than this, which supports the drying of the items to be washed.
- the outlet AG to the environment during the drying phase such as TP of the respective dishwashing program such as GP, EP is only opened when the sorption material SM at least a part, in particular a large part, of the moisture from the warm, humid washing room air PL has been adsorbed.
- the sorption material SM is sufficiently desorbed at the beginning of the drying phase TP, ie is regenerated, it can particularly efficiently adsorb water from the warm, humid washing room air during an initial period of the drying phase TP. Since the air in the washroom is then already partially dehumidified, it is advisable only then to open the additional outlet AG to the environment. As a result, any moisture damage to components of the household dishwasher or to adjacent kitchen furniture due to the air ALU escaping into the environment is largely avoided.
- the additional outlet AG remains closed in order to avoid undesirable thermal energy losses to the environment.
Landscapes
- Washing And Drying Of Tableware (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 (de) | 2021-07-19 | 2022-07-07 | Haushaltsgeschirrspülmaschine mit einem sorptionstrocknungssystem sowie zugehöriges verfahren zum durchführen eines energiespar-geschirrspülprogramms |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4373378A2 true EP4373378A2 (de) | 2024-05-29 |
| EP4373378B1 EP4373378B1 (de) | 2025-04-23 |
Family
ID=82492552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22740878.8A Active EP4373378B1 (de) | 2021-07-19 | 2022-07-07 | Haushaltsgeschirrspülmaschine mit einem sorptionstrocknungssystem sowie zugehöriges verfahren zum durchführen eines energiespar-geschirrspülprogramms |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4373378B1 (de) |
| DE (1) | DE102021207644A1 (de) |
| PL (1) | PL4373378T3 (de) |
| WO (1) | WO2023001567A2 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023208264A1 (de) | 2023-08-29 | 2025-03-06 | BSH Hausgeräte GmbH | Haushaltsgeschirrspülmaschine mit einem Sorptionstrocknungssystem sowie zugehöriges Verfahren zum Durchführen eines Energiespar-Geschirrspülprogramms |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008043576A1 (de) * | 2008-11-07 | 2010-05-12 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum Betreiben einer Geschirrspülmaschine |
| DE102012000013A1 (de) | 2012-01-02 | 2013-07-04 | Zeo-Tech Zeolith-Technologie Gmbh | Sorber mit Sorptionsmittel zur Luftentfeuchtung |
| DE102013101673A1 (de) | 2013-02-20 | 2014-08-21 | Miele & Cie. Kg | Geschirrspülmaschine und Verfahren zum Betreiben einer Geschirrspülmaschine |
| DE102013213359B3 (de) * | 2013-07-08 | 2014-10-30 | Illinois Tool Works Inc. | Verfahren zum Betreiben einer Spülmaschine sowie Spülmaschine |
| EP3019067B1 (de) * | 2013-07-11 | 2018-11-14 | Arçelik Anonim Sirketi | Haushaltsgerät mit trockenmittel |
| DE102014222539A1 (de) * | 2014-11-05 | 2016-05-12 | BSH Hausgeräte GmbH | Geschirrspülmaschine mit einer Trocknungseinrichtung |
-
2021
- 2021-07-19 DE DE102021207644.0A patent/DE102021207644A1/de not_active Withdrawn
-
2022
- 2022-07-07 PL PL22740878.8T patent/PL4373378T3/pl unknown
- 2022-07-07 WO PCT/EP2022/068856 patent/WO2023001567A2/de not_active Ceased
- 2022-07-07 EP EP22740878.8A patent/EP4373378B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023001567A2 (de) | 2023-01-26 |
| WO2023001567A3 (de) | 2023-03-09 |
| PL4373378T3 (pl) | 2025-08-04 |
| EP4373378B1 (de) | 2025-04-23 |
| DE102021207644A1 (de) | 2023-01-19 |
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