EP3865614A1 - Procédé de fonctionnement d'un appareil électrique à circulation d'eau et appareil électrique à circulation d'eau - Google Patents

Procédé de fonctionnement d'un appareil électrique à circulation d'eau et appareil électrique à circulation d'eau Download PDF

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Publication number
EP3865614A1
EP3865614A1 EP21154696.5A EP21154696A EP3865614A1 EP 3865614 A1 EP3865614 A1 EP 3865614A1 EP 21154696 A EP21154696 A EP 21154696A EP 3865614 A1 EP3865614 A1 EP 3865614A1
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EP
European Patent Office
Prior art keywords
electrochemical cell
water
electrical device
bleaching
containing solution
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
Application number
EP21154696.5A
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German (de)
English (en)
Other versions
EP3865614B1 (fr
Inventor
Werner Strothoff
Maximilian Schmid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miele und Cie KG
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Miele und Cie KG
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Publication of EP3865614A1 publication Critical patent/EP3865614A1/fr
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/003—Washing machines, apparatus, or methods not otherwise provided for using electrochemical cells

Definitions

  • the invention relates to a method for operating a water-bearing electrical device and a water-bearing electrical device.
  • the invention relates to a method for operating a water-bearing electrical device with a bleaching device which is designed to carry out cleaning using an activated bleach, and to a water-bearing electrical device which is designed to carry out the method.
  • the invention thus poses the problem of providing a method for operating a water-bearing electrical device and a water-bearing electrical device in which fewer components have to be fed to the water-bearing electrical device to generate an activated bleach.
  • the advantages that can be achieved with the invention are, in addition to the possibility of generating activated bleach electrolytically in a water-bearing electrical device, that it can be ideally combined with automatic dosing and / or that a very good cleaning performance can be achieved.
  • it is easy and safer to handle without endangering the user, since it can be generated in situ in the electrochemical cell and can therefore be used directly in the water-bearing electrical device.
  • the invention makes it possible to use a bleaching agent without the storage containers or bottles swelling when stored incorrectly and loss of activity occurring when the bleaching agent has been stored for a long time. It is possible to use a label-free bleach for a cleaning process, as it is possible with the invention to produce the bleach-containing solution in the water-bearing electrical device and to generate and use it in situ in the cleaning process.
  • the bleaching agent produced and / or the activated bleaching preferably also has a disinfecting effect in addition to the cleaning and bleaching effect.
  • the disinfectant or hygienic effect between a bleach, an activated bleach and a disinfectant is considered to be equivalent.
  • an aqueous electrolyte-containing solution is provided in the electrochemical cell.
  • the phrase “providing an aqueous electrolyte-containing solution in the electrochemical cell” is to be understood as meaning that the aqueous electrolyte-containing solution is either arranged in the electrochemical cell or passed through it.
  • the electrochemical cell is designed to produce a hydrogen peroxide-containing bleaching agent using the electrolyte, water, air and electric current. If the electrochemical cell has the electrolyte, water and air and an electric current flows, water is oxidized at an anode of the electrochemical cell, with protons being formed. At the same time, the oxygen contained in the air is reduced at a cathode of the electrochemical cell, in particular a gas diffusion electrode. The protons are used up and hydrogen peroxide is produced.
  • the cathode is preferably designed as an oxygen diffusion electrode.
  • the anode can be a dimensionally stable anode, a mixed oxide electrode or a boron-doped diamond electrode.
  • the reaction product of electrolysis is a hydrogen peroxide solution.
  • An anode compartment in which the anode is located and a cathode compartment in which the cathode is located are preferred, for example through a membrane such as a cation exchange membrane spatially separated, so that an alkaline hydrogen peroxide solution is preferably produced.
  • the bleach activator is fed to the electrochemical cell and / or the bleaching device to react with the hydrogen peroxide.
  • the hydrogen peroxide also reacts partially or completely with the bleach activator to form an activated bleach such as peracetic acid.
  • the bleach activator is selected from the group consisting of N-acetylcaprolactam, TAED (tetraacetylethylene diamine), triacetin, propylene glycol diacetate and triethyl citrate.
  • the bleach activators work well with hydrogen peroxide to form an activated bleach.
  • the alkaline hydrogen peroxide solution reacts very well with the bleach activator to form the activated bleach.
  • the TAED is preferably used as a suspension.
  • the electrolyte is preferably a builder or an inorganic salt.
  • a builder is a complexing agent and / or sequestering agent.
  • the builder in combination with one or more surfactants or other cleaning-active substances, the builder can further significantly improve the cleaning effect and dirt-carrying power of the cleaning solution.
  • a builder also has the property of supporting the detachment of dirt from the surfaces, so that cleaning is significantly accelerated.
  • the builder effect is independent of the effect as a complexing agent or sequestering agent.
  • a builder is also known as a builder.
  • the builder is also preferably designed to stabilize the hydrogen peroxide produced in the alkaline range as well, as a result of which the electrolytically produced hydrogen peroxide can be stored.
  • the addition of the builder means that the electrical conductivity of the electrolyte solution is sufficient so that the electrochemical cell works in a current-effective manner.
  • the builder preferably has one or more components selected from the group consisting of citric acid, lactic acid, phosphonate, polycarboxylic acid, aminocarboxylic acid, polyacrylic acid and / or their salts or consists of them.
  • the builder is preferably one or more of the above components.
  • the inorganic salt is preferably sodium sulfate, sodium hydrogen carbonate, potassium hydrogen carbonate or potassium hydroxide. The inorganic salt is used to ensure a current flow (conductivity) in the electrochemical cell.
  • the steps of providing the aqueous electrolyte-containing solution in the electrochemical cell and supplying the bleach activator into the electrochemical cell include conducting the aqueous electrolyte-containing solution Solution and the bleach activator individually or together through the anode compartment and the cathode compartment of the electrochemical cell.
  • the step of feeding the bleach activator into the bleaching device comprises metering the bleach activator upstream of the electrochemical cell, so that the bleach activator is passed through the electrochemical cell when it is fed into the bleaching device.
  • the step of feeding the bleach activator into the bleaching device preferably comprises metering the bleach activator between the anode of the electrochemical cell and the cathode of the electrochemical cell. This is advantageous if the anode compartment and the cathode compartment are separated from one another, and the bleach activator is preferably passed into the cathode compartment in which the hydrogen peroxide is generated.
  • the step of feeding the bleach activator into the bleaching device preferably comprises metering the bleach activator directly into the bleaching device; then the bleach activator is not passed through the electrochemical cell.
  • the electrochemical cell is preferably operated in parallel flow through the anode compartment and the cathode compartment.
  • a flow rate through the cathode space and a flow rate through the anode space can be the same or different.
  • the water-carrying electrical device can have a storage container which is connected in the circuit to the cathode compartment, and a further storage container which is connected in the circuit to the anode compartment separated from the cathode compartment.
  • the electrochemical cell is operated one after the other through the anode compartment and then the cathode compartment.
  • the water-bearing electrical device can have a storage container which supplies the electrolyte-containing solution to the anode compartment or is connected in a circuit to the anode and cathode compartments.
  • the cathode compartment is connected to the bleaching device via a line.
  • the electrochemical cell is preferably flowed through once by the aqueous electrolyte-containing solution.
  • the device has one or more storage containers that the electrochemical cell flows through the electrochemical cell several times with the aqueous electrolyte-containing solution. Thereby, a yield of the electrolytically produced bleach can be increased.
  • the method can have a step in which a liquid located in the bleaching device is supplied to the electrochemical cell. Then it is possible this To convey liquid in the circuit through the bleaching device, the cathode compartment and the anode compartment.
  • an electrolyte-containing solution in the bleaching device can be passed several times through the electrochemical cell while it is activated. This can increase the conversion of the electrolysis.
  • the invention also relates to a water-conducting electrical device with a bleaching device, an electrochemical cell and a regulating and / or control device which is set up and designed to regulate and / or control a method according to one of the embodiments described above.
  • the water-carrying electrical device can be a privately used device or a commercially used device.
  • the water-bearing electrical device is preferably a device suitable for washing, rinsing and / or disinfecting, which is used commercially or in the household.
  • the water-bearing electrical device is preferably a cleaning device.
  • the bleaching device is any device that is suitable for bleaching items to be cleaned or itself, such as, for example, a tub / drum unit of a washing machine, a washing area of a dishwasher or a disinfector.
  • the water-bearing electrical device is preferably designed as a washing machine, dishwasher or disinfector.
  • the electrolyte solution fed into the bleaching device is suitable, for example, as a cleaning agent for washing items to be washed such as, for example, laundry, dishes, medical devices or laboratory devices and / or the bleaching device itself.
  • the washing machine, the disinfector and the dishwasher represent bleaching devices because they are particularly suitable for bleaching, cleaning and / or disinfecting items to be washed and / or washed.
  • coffee brewing and storage rooms of a coffee machine or rooms for the preparation of food and / or drinks similar devices represent a bleaching device because they germinate over time and are used for bleaching, cleaning and / or disinfecting themselves.
  • the bleaching device can therefore also be a device whose main concern is not to clean objects, but which is contaminated by use and has to be cleaned itself at intervals and is therefore used temporarily as a bleaching device in order to be cleaned itself.
  • the bleaching device therefore represents a device which is suitable for cleaning objects by starting up or cleaning itself.
  • a coffee machine is a bleaching device which, in addition to its purpose of preparing coffee, is cleaned from time to time in order to prevent it from calcification, contamination and / or contamination.
  • water-conducting electrical device also includes CIP (cleaning-in-place) systems or the like, which are used, for example, in hospital hygiene and the food industry.
  • CIP cleaning-in-place
  • the The invention therefore also relates to a method for operating a device in which process engineering systems such as pharmaceutical systems or biological systems are cleaned, which is usually carried out in a location-specific manner. In this case, the installation to be cleaned represents the bleaching device.
  • the electrochemical cell is then connected to the cleaning device to be cleaned, preferably via a line.
  • the water-carrying electrical device preferably has the metering device which is suitable for feeding the electrolyte solution in a predetermined dose into the electrochemical cell which is arranged between the bleaching device and the metering device.
  • the metering device is preferably an automatic metering device.
  • an automatic metering device is understood to mean a metering device which automatically supplies a predetermined dose of liquid to the electrochemical cell and / or the bleaching device when this is necessary.
  • the metering device can be designed in one or more parts.
  • the metering device has at least two metering chambers which are formed adjacent to or spaced apart from one another.
  • Each metering chamber is preferably connected to the bleaching device via a respective line in order to be able to supply it with liquid during operation.
  • the electrochemical cell is arranged between the respective associated dosing chamber and the bleaching device, so that when a dosing activity is activated, the electrolyte solution is passed from the associated dosing chamber through the line into the electrochemical cell and then into the bleaching device.
  • the term dosing chamber is also understood to mean exchangeable containers such as storage containers or bottles, which are arranged in a holding device.
  • the lines can be hoses, pipes, channels or the like.
  • the electrolyte-containing solution can furthermore have one or more customary ingredients for cleaning agents, preferably for washing laundry or rinsing dishes, medical instruments or laboratory equipment.
  • customary ingredients for cleaning agents preferably for washing laundry or rinsing dishes, medical instruments or laboratory equipment.
  • these are surfactants, foam inhibitors, enzymes, enzyme stabilizers, color transfer inhibitors, graying inhibitors, optical brighteners, UV absorbers, thickeners, ion exchangers, water softeners, dyes and fragrances.
  • a cleaning agent can also be used which has the electrolyte-containing solution and also one or more of the above-mentioned customary ingredients for cleaning agents in the form of two separate liquids, one liquid containing the electrolyte-containing solution and the other liquid or several of the ingredients typical for washing or dishwashing detergents or cleaning agents, such as surfactants, enzymes etc. contains.
  • the two separate liquids are preferably arranged separately in the metering device assigned externally or internally to the water-carrying electrical device, and the electrolyte-containing solution is fed to the bleaching device via the electrochemical cell and the further liquid is added to the bleaching device directly, i.e. not via the electrochemical one, at the same time or at different times Cell fed.
  • components contained in the further liquid which are either not bleach-resistant and / or are themselves electrolytically oxidizable can be protected from degradation. This prevents ingredients that are sensitive to the electrolytically generated hydrogen peroxide and / or activated bleach from decomposing.
  • the water-bearing electrical device preferably has one or more storage containers. If the anode and cathode compartments are spatially separated, a storage container can each be assigned to the cathode compartment and / or the anode compartment, as described above.
  • Fig. 1 shows a sectional view of a water-conducting electrical device according to a first embodiment.
  • the water-bearing electrical device 1 has a bleaching device 2 and an electrochemical cell 3.
  • the electrochemical cell 3 has a cathode (not shown) arranged in a cathode chamber 31 and an anode arranged in an anode chamber 32 (not shown).
  • the cathode compartment 31 and the anode compartment 32 are spatially separated, for example by a membrane (not shown).
  • the water-bearing electrical device 1 is shown purely by way of example as a washing machine, the bleaching device 2 having a tub and a drum. Furthermore, the water-carrying electrical device 1 has a metering device with two metering chambers 7, 8.
  • One metering chamber 7 is connected to both the cathode compartment 31 and the anode compartment 32 of the electrochemical cell 3 via a metering line 71 and a valve 4, while the further metering chamber 8 is connected to the bleaching device 2 via a further metering line 81.
  • the anode compartment 32 and the cathode compartment 31 are also connected to the bleaching device 2 via a supply line 14.
  • the cathode space 31 is also connected to a gas pump 6 via a gas supply line (not shown).
  • a solution in the electrochemical cell 3 can also be removed from the water-carrying electrical device 1 via a line 5.
  • the water-bearing electrical device 1 has a control or regulating device (not shown) which is set up and designed to control or regulate a cleaning or washing program that is made by a user (not shown) from several cleaning programs stored in it (not shown) can be selected.
  • a washing program of a washing machine usually has a washing process for washing laundry in the drum, one or more rinsing phases for rinsing the laundry and possibly a spin phase for spinning the laundry.
  • the metering chamber 7 contains an electrolyte-containing solution.
  • the electrolyte-containing solution can also have a bleach activator.
  • the metering chamber 8 can contain the bleach activator.
  • the further dosing chamber 8 can also have one or more conventional ingredients for detergents for washing laundry.
  • Fig. 2 shows a sectional view of a water-carrying electrical device according to a second embodiment.
  • the water-bearing electrical device 1 shown corresponds to that in FIG Fig. 1 shown water-carrying electrical device with the difference that two pumps 10 are integrated into the metering line 71, by means of which the electrolyte-containing solution can be supplied to the cathode compartment 31 and the anode compartment 32 with different flow rates.
  • the water-carrying electrical device 1 has a water tank 9 which is connected to the electrochemical cell 3 via a line 5 and a pump 10, so that the electrochemical cell 3 can be supplied with water from the water tank 9 by activating the pump 10.
  • water from the water tank 9 is supplied. This can be done to dilute the water- and electrolyte-containing solution.
  • the water can be supplied following an electrolysis carried out in the electrochemical cell 3 in order to clean the electrochemical cell 3 by means of rinsing with water.
  • Fig. 3 shows a sectional view of a water-conducting electrical device according to a third embodiment.
  • the water-bearing electrical device 1 shown corresponds to that in FIG Fig. 2
  • Fig. 4 shows a sectional view of a water-conducting electrical device according to a fourth embodiment.
  • the water-bearing electrical device 1 shown corresponds to that in FIG Fig. 3 shown water-bearing electrical device with the difference, that it does not have a water tank and the bleaching device 2 is connected to the cathode compartment 31 and the anode compartment 32 of the electrochemical cell 3 via a line 5 and a pump 10 integrated in it, so that a liquid of the electrochemical cell 3 that is still in the bleaching device 2 is feedable.
  • an electrolyte-containing solution metered into the electrochemical cell 3 by the metering chamber 7 can be fed to the bleaching device 2 via the feed line 14 and then fed back to the electrochemical cell 3 via the line 5 together with the integrated pump 10.
  • Fig. 5 shows a sectional view of a water-conducting electrical device according to a fifth embodiment.
  • the water-bearing electrical device 1 shown corresponds to that in FIG Fig. 3
  • the water-carrying electrical device shown with the difference that the metering device has a further metering chamber 15 which contains a further bleach activator and which is connected to the valve 4 via the further supply line 62 in such a way that the further bleach activator is added to the bleaching agent generated in the electrochemical cell 3 after leaving the electrochemical cell 3 can be supplied.
  • the dosing chamber 7 can contain a bleach activator, while the dosing chamber 8 does not contain a bleach activator.
  • Fig. 6 shows a partial view of a variant of the in Fig. 5 shown water-bearing electrical device.
  • the water-bearing electrical device shown corresponds to that in Fig. 5 shown water-carrying electrical device with the difference that it has a storage container 16 which is arranged between the cathode space 31 and the anode space 32 and is connected to them via a storage container line 17.
  • the catholyte can be fed to the storage container 16 or the bleaching device (not shown) via the feed line 14.
  • the catholyte can be fed from the storage container 16 to the anode space 32 via the storage container line 17.
  • Fig. 7 shows a partial view of a variant of the in Fig. 6 shown water-bearing electrical device.
  • the water-bearing electrical device shown corresponds to that in Fig. 6
  • the water-carrying electrical device shown with the difference that it has a further storage container 18, which is connected in the circuit to the anode compartment 32 via a further storage container line 19, and the storage container 16 is connected in the circuit to the cathode compartment 31 via the storage container line 17.
  • the catholyte in the storage container 16 and the anolyte in the further storage container 17 can be stored separately from one another and flow through the cathode space 31 and the arrangement space 32 separately from one another.
  • Fig. 8 shows a partial view of a further variant of the in Fig. 6 shown water-bearing electrical device.
  • the water-bearing electrical device shown corresponds to that in Fig. 6 shown water-bearing electrical device with the difference that the Storage tank 16 is connected to the anode space 32 via the storage tank line 17.
  • Fig. 9 shows a time course of an electrolytic production of bleaches with different anode materials.
  • An anode compartment and a cathode compartment spatially separated from the anode compartment of an electrochemical cell with a gas diffusion electrode as cathode were each flowed through with 10.0 g ⁇ L ⁇ 1 builder as the electrolyte with a volume flow of 0.5 L ⁇ min ⁇ 1.
  • the electrochemical cell is also provided with 7.5 g of triacetin as a bleach activator.
  • the anode is designed as a boron-doped diamond electrode (BDD), while in a second variant it is designed as a dimensionally stable anode (DSA).

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
EP21154696.5A 2020-02-12 2021-02-02 Procédé de fonctionnement d'un appareil électrique à circulation d'eau et appareil électrique à circulation d'eau Active EP3865614B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020103641.8A DE102020103641A1 (de) 2020-02-12 2020-02-12 Verfahren zum Betreiben eines wasserführenden elektrischen Geräts und wasserführendes elektrisches Gerät

Publications (2)

Publication Number Publication Date
EP3865614A1 true EP3865614A1 (fr) 2021-08-18
EP3865614B1 EP3865614B1 (fr) 2023-11-01

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EP (1) EP3865614B1 (fr)
DE (1) DE102020103641A1 (fr)
ES (1) ES2963990T3 (fr)
PL (1) PL3865614T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4575062A1 (fr) 2023-12-18 2025-06-25 Miele & Cie. KG Procédé de production de peroxyde d'hydrogène dans une cellule électrochimique multifonction
EP4574772A1 (fr) 2023-12-18 2025-06-25 Miele & Cie. KG Procédé de traitement d'eau à base d'électrode à plusieurs étages
EP4575063A1 (fr) 2023-12-18 2025-06-25 Miele & Cie. KG Procédé de suivi de la santé d'un utilisateur par l'intermédiaire du linge
EP4574770A1 (fr) 2023-12-18 2025-06-25 Miele & Cie. KG Recyclage d'eaux usées de lessive

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2341356A (en) * 1940-05-24 1944-02-08 Robert E Briggs Method of electrolytic precipitation of dissolved substances from solutions
US6387238B1 (en) * 1999-08-05 2002-05-14 Steris Inc. Electrolytic synthesis of peracetic acid
US20020166177A1 (en) * 2001-05-10 2002-11-14 Maytag Corporation Washing machine incorporating a bleach activator
US20090165823A1 (en) * 2006-04-11 2009-07-02 Dyson Technology Limited Electrolytic cells
EP2220282A1 (fr) * 2007-11-27 2010-08-25 Unilever PLC Système de blanchisserie pour textiles délicats

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Publication number Priority date Publication date Assignee Title
EP1739207A3 (fr) 2005-06-27 2007-10-03 Unilever N.V. Dispositig et méthode de génération de péroxyde
US20110237484A1 (en) 2010-03-25 2011-09-29 Basf Se Electrochemical textile-washing process
PL3692200T3 (pl) 2017-10-05 2023-09-25 Electrolux Appliances Aktiebolag Pralka
DE102018218878A1 (de) 2018-11-06 2020-05-07 Henkel Ag & Co. Kgaa Vorrichtung zur Aktivierung einer Mediatorspezies

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2341356A (en) * 1940-05-24 1944-02-08 Robert E Briggs Method of electrolytic precipitation of dissolved substances from solutions
US6387238B1 (en) * 1999-08-05 2002-05-14 Steris Inc. Electrolytic synthesis of peracetic acid
US20020166177A1 (en) * 2001-05-10 2002-11-14 Maytag Corporation Washing machine incorporating a bleach activator
US20090165823A1 (en) * 2006-04-11 2009-07-02 Dyson Technology Limited Electrolytic cells
EP2220282A1 (fr) * 2007-11-27 2010-08-25 Unilever PLC Système de blanchisserie pour textiles délicats

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4575062A1 (fr) 2023-12-18 2025-06-25 Miele & Cie. KG Procédé de production de peroxyde d'hydrogène dans une cellule électrochimique multifonction
EP4574772A1 (fr) 2023-12-18 2025-06-25 Miele & Cie. KG Procédé de traitement d'eau à base d'électrode à plusieurs étages
EP4575063A1 (fr) 2023-12-18 2025-06-25 Miele & Cie. KG Procédé de suivi de la santé d'un utilisateur par l'intermédiaire du linge
EP4574770A1 (fr) 2023-12-18 2025-06-25 Miele & Cie. KG Recyclage d'eaux usées de lessive

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DE102020103641A1 (de) 2021-08-12
ES2963990T3 (es) 2024-04-03
EP3865614B1 (fr) 2023-11-01
PL3865614T3 (pl) 2024-03-04

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