EP2563963B1 - Verfahren zum erkennen eines betriebszustands in einem hausgerät und hierfür geeignetes hausgerät - Google Patents

Verfahren zum erkennen eines betriebszustands in einem hausgerät und hierfür geeignetes hausgerät Download PDF

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Publication number
EP2563963B1
EP2563963B1 EP11711935.4A EP11711935A EP2563963B1 EP 2563963 B1 EP2563963 B1 EP 2563963B1 EP 11711935 A EP11711935 A EP 11711935A EP 2563963 B1 EP2563963 B1 EP 2563963B1
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EP
European Patent Office
Prior art keywords
ozone
domestic appliance
sensor
hygiene
concentration
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.)
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Application number
EP11711935.4A
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German (de)
English (en)
French (fr)
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EP2563963A1 (de
Inventor
Hans Eglmeier
Andreas Hanau
Hartmut Schaub
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.)
BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL11711935T priority Critical patent/PL2563963T3/pl
Publication of EP2563963A1 publication Critical patent/EP2563963A1/de
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Publication of EP2563963B1 publication Critical patent/EP2563963B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • 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
    • A47L15/0057—Cleaning of machines parts, e.g. removal of deposits like lime scale or proteins from piping or tub
    • 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
    • A47L15/4236—Arrangements to sterilize or disinfect dishes or washing liquids
    • A47L15/424—Arrangements to sterilize or disinfect dishes or washing liquids by using ozone
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • 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
    • D06F35/001—Washing machines, apparatus, or methods not otherwise provided for using ozone
    • 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
    • A47L2401/34—Other automatic detections
    • 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
    • A47L2501/26—Indication or alarm to the controlling device or to the user
    • 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
    • A47L2501/34—Change machine operation from normal operational mode into special mode, e.g. service mode, resin regeneration mode, sterilizing mode, steam mode, odour eliminating mode or special cleaning mode to clean the hydraulic circuit
    • 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
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/08—Ozone
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/16—Washing liquid temperature
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/64—Radiation, e.g. microwaves
    • D06F2103/66—Radiation, e.g. microwaves for treatment of laundry otherwise than by drying, e.g. using UV light
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58—Indications or alarms to the control system or to the user
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/58—Indications or alarms to the control system or to the user
    • D06F2105/60—Audible signals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces

Definitions

  • the invention relates to a method for detecting an operating state in a household appliance with a control device, a device for providing ozone and at least one ozone sensor, as well as a household appliance particularly suitable for this purpose.
  • a method and a household appliance of each type emerge from the document DE 102 37 854 A1 , There, a household appliance is described, in which a degree of contamination of a cleaning liquid is determined by adding this cleaning liquid with ozone and the decrease of the ozone is determined by oxidation of organic constituents in the cleaning liquid.
  • Biofilms contain immobilized bacteria embedded in a polymer matrix of microbial origin and, in addition to cells of such microorganisms, may contain abiotic and inorganic components in greater amounts, all being held together by mucus formed by bacteria.
  • the water content is relatively high with generally 80 to 95% of the moisture content.
  • a special hygiene program is sometimes activated in which, for example, using steam and / or provided with bioactive additives liquids or gases cleaning of the relevant parts of the household appliance is performed.
  • Ozone is not just a powerful disinfectant; it also, in conjunction with a care or cleaning agent applied in a household appliance, causes complex and rapid reactions leading to improved care or Cleaning effect can lead.
  • the use of ozone for hygiene programs is therefore becoming increasingly popular.
  • the WO 2007/143785 A1 describes a system and apparatus for introducing ozone into a washing machine.
  • the system includes a first conduit for introducing ozone from an ozone supply into a scrubbing liquid inlet and a second conduit for discharging ozone into an area above a scrubbing chamber.
  • a Venturi nozzle is used for introducing ozone and for mixing with a washing liquid.
  • a washing machine in which existing microorganisms in a detergent dispenser, ie an induction bowl, are eliminated by the direct introduction of ozone from an ozone generator into the dispenser bowl.
  • water is added simultaneously to the ozone in the dispenser tray so that the ozone / water mixture is passed through the dispenser tray. This is intended to minimize the possibility of escape of ozone from the washing machine.
  • the US 2008/0302139 A1 discloses a tunnel washer comprising a plurality of zones for washing laundry in a continuous manner, two locations for injecting ozone, a water circuit connecting a water inlet and a water outlet, the water circuit comprising a water reservoir and a Venturi injector for dissolving ozone in Water and an ozone generator includes.
  • a negative pressure or vacuum may be applied to the tunnel washer via an ozone eliminator to prevent leakage of ozone.
  • a blower can be used for the generation of the negative pressure. Excess or leaking ozone can be catalytically converted back to normal oxygen in the ozone removing device.
  • the US 2006/0096038 A1 describes a system for monitoring ozone and controlling the supply of a washing machine with ozone.
  • An ozone sensor indicates the exceeding of a set ozone limit, whereupon an ozone generator is switched off until the ozone concentration is again below this limit. An elimination of ozone is not provided.
  • the DE 24 33 909 A1 describes a device for the care of garments with a closable with a door cabinet-shaped housing with a receiving space for garments to which the suction and Ausblasseite a recirculation fan with the interposition of an air heater are connected, the receiving space communicates via a fresh air filter with the outside and the suction side of an exhaust fan is connected to the receiving space while its exhaust ends in an opening of an outer wall of the housing. At least one ozonizer is provided for the air of the receiving space.
  • the outlet of the exhaust fan is connected to the outside space, wherein disposed in the exhaust path an exhaust filter whose filter material consists of activated carbon
  • the hygiene programs are not optimally adapted to the hygienic needs of home appliances, since the time, duration and intensity of the measures carried out in a hygiene program are not adjusted to the actual hygiene status in the domestic appliance. It would therefore be desirable to obtain qualitative and in particular quantitative information about the hygiene state of the household appliance.
  • the DE 102 37 854 A1 describes a method for operating a water-bearing device, wherein at least in a partial program step, the degree of contamination of the cleaning liquid by means of a wet combustion and a determination of the degree of combustion is determined.
  • a predetermined amount of ozone is introduced, conducted in and out of a subset of the cleaning fluid, and the amount of ozone discharged is measured and compared with the amount of ozone introduced.
  • the DE 102 37 853 A1 describes a method for measuring the amount of organic matter in a liquid, wherein the amount of organic matter in the liquid is determined by means of a wet combustion and a determination of the degree of combustion. For this purpose, a predetermined amount of ozone in a subset of the liquid on, by and discharged and measured by at least one arranged sensor, the amount of ozone discharged and compared with the amount of ozone introduced.
  • the US 2005/0268404 A1 describes a washing machine with an ozone inlet for a laundry receiving space ("washroom") and with an ozone outlet for receiving ozone from the washroom, the washing machine having an ozone sensor for measuring ozone received ozone.
  • the amount of ozone used should be better controlled, because the ozone depletion may be different for different loadings of laundry, so that it is difficult to determine the amount of ozone required for this, without disadvantageously using too much or too little ozone.
  • the object of the invention is to provide a method for operating a household appliance with which the hygiene state of a household appliance can be determined. Moreover, it is an object of the invention to provide a particularly suitable for carrying out this method domestic appliance.
  • the invention thus teaches methods for detecting an operating state in a domestic appliance with a control device, an apparatus for providing ozone and at least one ozone sensor according to independent claims 1 and 2.
  • the device for providing ozone may in particular be an ozone generator or else an opening or a buffer for an ozone-containing gas mixture or an ozone-containing liquid.
  • At least one inner component of the domestic appliance is subjected to an amount of M 1 of ozone and the Decrease ⁇ M of the amount M 1 of ozone after a predetermined time t set with an ozone sensor (b) and / or an ozone sensor (c) measured and evaluated to determine a hygiene parameter H as a measure of the hygiene state.
  • ozone sensor (a) ozone sensor (b)
  • ozone sensor (c) ozone sensor (d)
  • ozone sensor (d) ozone sensor
  • an inner component as used herein comprehensively means any part within a domestic appliance that may be the subject of microorganism deposits or even the formation of biofilms.
  • an inner component is a cavity of a domestic appliance, wherein the domestic appliance may have a plurality of cavities, on which individually or jointly the inventive method can be performed. Type and size of the cavity (hereinafter also called “cavity to be examined”) will depend on the domestic appliance.
  • Typical cavities in the sense of the invention are in a washing machine an induction bowl, a tub and a laundry drum, in an electric oven, a cooking chamber, a tumble dryer also a laundry drum, a heat exchanger and a condensate tank, a dishwasher in a dishwasher and a cooling unit a cooling or freezer.
  • a predetermined concentration c set of ozone is set in a predetermined cavity of the domestic appliance and in this cavity a time decrease of the concentration c of ozone measured with an ozone sensor (c) is used to determine a hygiene parameter H stat as a measure of evaluated the hygiene condition.
  • a predetermined concentration c set is adjusted to ozone
  • the hygiene parameter H stat is the half-life t 0.5 of the concentration of ozone corrected for the natural decomposition of the ozone.
  • the half-life t 0.5 is preferably determined by measuring a decay constant A, which is then also corrected with regard to the natural decomposition of the ozone.
  • the measuring time used in the method according to the invention can vary within a wide range. In general, the measuring time is significantly below the half-life t 0.5 .
  • a concentration c in at ozone is specified at an entrance to a cavity of the domestic appliance
  • an ozone-containing gas mixture or an ozone-containing liquid of unknown concentration of ozone is brought to the inlet and first with the ozone sensor (c) the concentration c in of ozone is measured.
  • ozone is used in the context of a hygiene program, the amounts of ozone used in this case will generally be greater than in the method according to the invention for detecting an operating state.
  • the predetermined value Hset will generally depend on the details of the methods of the invention performed. In addition, different component-specific values for H set can also be specified for various internal components of a domestic appliance.
  • the at least one ozone sensor used in the method according to the invention can be based on different measuring principles, whereby different measuring principles can also be used in a domestic appliance.
  • the ozone sensor (a), ozone sensor (b), ozone sensor (c) and / or ozone sensor (d) can determine an ozone concentration by the action of ozone on a substance located in the ozone sensor whose electrical resistance reversibly changed.
  • indium oxide can be used as such a material.
  • Indium oxide changes its resistance due to oxidation with ozone, but can be regenerated in a simple and rapid manner by means of a cold photochemical reduction process.
  • the electrical resistance of a 15 nm thick indium oxide layer changes by oxidation in proportion to the ozone concentration.
  • the indium oxide layer can be applied, for example, on the back of a violet light emitting diode (LED). When the LED is switched on, the oxidized indium oxide layer - and thus the ozone sensor - is regenerated by a cold photochemical reduction process.
  • LED violet light emitting diode
  • the invention also relates in each case to a household appliance with a control device according to claims 6 or 7.
  • a domestic appliance generally has a container for receiving objects to be treated. This can be, for example, in a dryer, washer-dryer or dryer a laundry drum, a cooker in a stove, a dishwasher in a dishwasher or a refrigerator a refrigerator or freezer.
  • the aforementioned means are in particular one or more ozone sensors, at least one pump or a fan for setting a desired flow of an ozone-containing air or an ozone-containing gas, an ozone removing device and / or various controllable closure devices with which a cavity to be examined are defined can.
  • the device for providing ozone may in particular be an ozone generator or else an opening or a buffer for an ozone-containing gas mixture or an ozone-containing liquid.
  • a per se known ozone generator is used.
  • the ozone can be used as gas or in aqueous solution.
  • ozone is used as the gas.
  • an ozone sensor (c) is arranged in a cavity of the household appliance to be examined and through which the gas or liquid can flow.
  • an ozone sensor (b) is arranged in the flow direction of an ozone-containing gas or an ozone-containing liquid behind a cavity to be examined. Further, in this case, an ozone sensor (a) is arranged in the flow direction of the ozone-containing gas or the ozone-containing liquid in front of the cavity to be examined. This allows accurate measurement even without accurate knowledge of the ozone concentration present in the ozone providing device.
  • the ozone sensor according to the invention is not limited, as long as it can be used in a domestic appliance.
  • an ozone sensor comprises a substance that is converted into volatile compounds by reaction with ozone, thereby causing a mass loss that can be used to quantitatively measure the amount of ozone present.
  • the substance can be examined gravimetrically.
  • the ozone sensor comprises a substance that changes its electrical resistance due to the action of ozone.
  • a substance that changes its electrical resistance due to the action of ozone is given above.
  • the household appliance according to the invention is not particularly limited.
  • the respective domestic appliance is a washing machine, a washer-dryer, a tumble dryer, a dishwasher, an oven or a refrigerator (refrigerator, freezer).
  • the domestic appliance is a domestic appliance that carries water and / or moist air during its operation.
  • the cavity can be, for example, the space between an inlet to the laundry drum and an outlet of a heat exchanger, e.g. an air-to-air heat exchanger.
  • the respective domestic appliance preferably has an ozone removing device and a fan and / or a suction pump, which can draw an ozone-containing gas mixture or an ozone-containing liquid through the ozone removing device.
  • the ozone removal device and a fan and / or a suction pump may be arranged in an exhaust duct, which exhaust duct is connected to the ozone-loaded inner components of the domestic appliance.
  • the ozone removing device is disposed between the inner component and the fan and / or the suction pump.
  • ozone is eliminated by being absorbed or decomposed on a suitable material.
  • the decomposition can For example, done by the fact that the ozone is chemically reacted with a suitable material or catalytically decomposed, for example, to form oxygen.
  • an ozone removing device comprises a filter unit, wherein the filter unit preferably comprises a carbon-containing material or another readily oxidizable material.
  • the carbon-containing material is at least one substance selected from the group consisting of activated carbon, polyarylene thioethers, polyarylene ethers and macroporous copolymers. Suitable Polyarylenthioether, polyarylene ethers and macroporous copolymers are, for example, in the EP 0 699 470 A1 described.
  • Activated carbon is particularly preferably used as the carbon-containing material.
  • Activated carbon is generally decomposed by ozone to form carbon dioxide, so that the amount of activated carbon in a filter unit gradually decreases. This decrease can be tracked in a sight glass located at the ozone removing device. A user of the household appliance can then possibly recognize whether the filter unit is still working properly, for example, by still enough activated carbon is present.
  • a preferably used in the respective household appliance according to the invention ozone generator generates about 20 mg / h to 30 mg / h of ozone.
  • a filter unit which is loaded with about 10 g of activated carbon, sufficient for the entire operating life of the household appliance.
  • the exhaust duct can lead into an installation room of the domestic appliance, since the exhaust air contains only small amounts of carbon dioxide and no other interfering components.
  • an ozone removing device may alternatively or in addition to a filter unit comprise a catalyst for the decomposition of ozone, for example a catalyst for the conversion of ozone into oxygen.
  • the respective domestic appliance preferably has an optical and / or acoustic display device, with which the implementation of an occurring method according to the invention and / or a result of this method can be displayed.
  • the exceeding of a hygiene parameter H set could be indicated acoustically and / or visually.
  • a control device which, in addition to the control of the method according to the invention, can generally also take countermeasures in the event of a malfunctioning removal of ozone.
  • the control device can turn off an existing ozone generator in a domestic appliance and / or cause a corresponding acoustic and / or visual display on a display device in a non-functioning ozone removal.
  • a pressure sensor and / or a temperature sensor are arranged in the tub.
  • Pressure and temperature sensor if present, are preferably arranged in a lower region of the tub, so that pressure and / or temperature of an aqueous liquid present in the tub can be measured.
  • a washing machine generally has a tub as well as a rotatable in the tub, preferably horizontally rotatable, mounted drum for receiving laundry to be cleaned.
  • a washing machine generally also has a lye drainage system arranged at the bottom of the lye container with a drain pump and generally also laundry hoppers and / or scooping devices.
  • the invention has the advantage that it is possible in a simple and efficient manner to determine the hygiene state of household appliances. This is possible according to the invention by using device components which are already present in a domestic appliance in which ozone is used (ozone generator, ozone removal system, pump, ozone sensor). Finally, the methods according to the invention make it possible to provide improved hygiene programs, in particular for improving a detected hygiene value, and in addition the type, duration, intensity and frequency of use can be optimized on the basis of the hygiene values obtained according to the invention. This will become a general one Improved hygiene of the household appliance achieved, which can also be specifically improved for special user groups such as allergy sufferers.
  • Fig. 1 is a schematic representation of the parts relevant to the present explanation of a first embodiment of a domestic appliance 1, which is designed here as a washing machine, in which a method to be explained below can be performed.
  • Washing machine 1 shown has a tub 2, in which a drum 3 can be rotatably mounted about a horizontal axis of rotation 49 and operated by a drive motor 14.
  • the arrow indicates here the direction of rotation of the drum 3.
  • Wäschemitpercussion 34 and 5 Schmüinraumen 5 for the wash liquor 6 are on the inner surface of the drum shell available.
  • the washing machine 1 also has a water supply system, which in a water supply 8 arranged a water connection fitting, not shown here for the domestic water network, an electrically controllable valve 9 and a Waschstoffein Whynd ("Ein Stammschale") 11.
  • the water coming in via the water supply line 8 can transport detergent portions located there via the dispensing tube 11 into the tub 2 via the connecting tube 10.
  • ozone supply line 25 which is connected to an ozone generator 32.
  • the ozone generator 32 30 air is supplied in a supply air duct.
  • the ozone-containing air contained in the water supply line 8 in the ozone supply line 25 from the domestic water network can be mixed in particular by utilizing the Venturi effect.
  • ozone can get into the dispensing dish 11 or subsequently into the tub 2 together with water.
  • ozone may also be introduced into the tub 2 as a gas, in particular as part of an ozone-containing gas mixture such as air.
  • an ozone sensor (a) 16 is arranged, with the aid of which in the embodiment shown here at a set by means of a suction pump 21 flow velocity v set a concentration c in ozone can be measured in front of the dispenser 11, which is used as a reference value for a in the following takes place decrease of the ozone concentration.
  • the position of ozone sensor (a) 16 is hereby regarded as the input to the dispenser shell 11 as a cavity according to the invention.
  • suction pump 21 can suck ozone-containing air from the dispenser 11, the tub 2 and the drum 3.
  • the dispenser 11 is connected via a connecting tube (filling hose) 10 with the tub 2.
  • the dispensing dish 11 is connected via a first partial exhaust air duct 18 and the tub 2 via a second partial exhaust air duct 19 to an exhaust air duct 17.
  • First exhaust air duct 18 and second exhaust air duct 19 thus form the connecting pipe 10 between the dispenser 11 and the tub 2.
  • Ozone-containing air or ozone-containing aqueous liquid from the ozone generator 32 can pass through the dispensing tray 11 into the tub 2, the drum 3 and the connecting tube 10 connecting them.
  • located microorganisms that may be present as biofilms are attacked by the ozone. Through these reactions the content of ozone in the air or in the aqueous liquid decreases beyond the extent due to the natural decomposition of the ozone.
  • the concentration c out of ozone detected by means of an ozone sensor (b) 27 can be used to determine the decrease in the ozone concentration due to these processes.
  • the position of the ozone sensor (b) 27 is hereby regarded as the exit from the cavity to be examined.
  • the concentration difference ⁇ c c in -c out - ⁇ c dec , where ⁇ c dec is a measure of the natural decomposition of ozone, to determine a Hygieneparameters H dyn evaluated.
  • the method to be explained here refers here only to the dispenser tray 11 as an inner component or cavity, since ozone-containing air will not get into the tub 2 in this embodiment.
  • the first embodiment shown here also illustrates a second possibility for a specific determination of the hygiene state of the dispenser tray 11.
  • an ozone sensor (c) 24 is arranged in the dispenser tray 11 as a predetermined cavity. It can now be set in the Ein réelleschale 11 by introducing a known amount or concentration of ozone, a predetermined concentration c set of ozone.
  • an ozone concentration initially determined by the ozone sensor (c) 24 can also be assumed to be c set , which represents a reference point for the method to be explained here.
  • the time decrease of the concentration c of ozone measured with the ozone sensor (c) 24 is evaluated.
  • the hygienic parameter H stat is the half-life t 0.5 of the concentration of ozone corrected for the natural decomposition of the ozone. This is determined in this embodiment via an evaluation of a measured decay constant ⁇ for the ozone, wherein the decay constant and the half-life t 0.5 are inversely proportional to each other, but the further evaluation of the decay constant ⁇ can be simpler than the evaluation of the half-life t 0.5 .
  • the measurement of a decay constant ⁇ should be considered to be in principle equivalent to the measurement of a half-life t 0.5 , since in each case the evaluation of a series of exponentially decaying measured data is important in the first place.
  • the method here only includes the dispenser shell 11 and no supply or discharge lines, this can be separated from the rest of the domestic appliance by closure devices, not shown here in detail.
  • the suction pump 21 is this purpose in Exhaust duct 17 between the ozone removing device 20 and the exhaust outlet 22 is arranged.
  • a filter unit 28 which contains activated carbon as a carbon-containing material in the presently described embodiment.
  • An ozone sensor (d) 31 for measuring an ozone content is disposed between the ozone removing device 20 and the suction pump 21. A proper functioning of the ozone removing device 20 is present when the ozone sensor (d) 31 can detect no or only extremely small amounts of ozone.
  • a display device 29 is located on the washing machine 1 of the specific embodiment shown here.
  • a heater 13 in the tub 2 embodiments without heating there is a heater 13 in the tub 2 embodiments without heating, however, are conceivable.
  • the valve 9 as well as the heater 13 may be controlled by a controller 12 in response to a schedule corresponding to a time schedule and / or to the achievement of certain measurements of parameters such as liquor level, liquor temperature, drum speed, etc. within the range Washing machine can be tied.
  • the signals from the drive motor 14, pressure sensor 15, ozone generator 32, suction pump 21, ozone sensor (a) 16, ozone sensor (b) 27, ozone sensor (c) 24 and ozone sensor (d) 31 are fed to the controller 12, although for reasons the clarity is not shown in each case.
  • Fig. 1 means 15 a pressure sensor for the measurement of the hydrostatic pressure p in the tub 2, which results from the level of forming in the tub 2 free liquor.
  • the power of the suction pump 21 is variable in this embodiment, so that depending on a method for operating the washing machine optimum suction power can be adjusted.
  • the suction power may vary, depending on whether a laundry treatment process using ozone, a method for determining the hygiene state or a hygiene method explained here is carried out.
  • drum 3 laundry items 7 and 6 are indicated to illustrate the washing machine.
  • laundry items 7 and 6 are indicated to illustrate the washing machine.
  • FIG. 12 is an illustration of parts relevant to the present explanation of a second embodiment of a washing machine 1 in which a method to be explained below can be performed.
  • Washing machine 1 shown has a tub 2, in which a drum 3 can be rotatably mounted about a horizontal axis of rotation 49 and operated by a drive motor 14.
  • the arrow indicates here the direction of rotation of the drum 3.
  • Wäschemitivity 34 and 5 Schmüinraumen 5 for the wash liquor 6 are on the inner surface of the drum shell available.
  • the washing machine 1 also has a water supply system, which in a water supply 8 arranged a not shown here water connection fitting for Domestic water network, an electrically controllable valve 9 and a Waschstoffein Whynd (“Ein réelleschale”) 11 has.
  • the water coming in via the water supply line 8 can transport detergent portions located there via the dispensing tube 11 into the tub 2 via the connecting tube 10.
  • a Venturi nozzle 26 which is connected in the embodiment shown here via an ozone supply line 25 with an ozone generator 32.
  • the ozone generator 30 air is supplied in a supply air duct.
  • About the venturi 26 sucks in the water supply 8 flowing water from the domestic water network in the ozone supply line 25 located, ozone-containing air.
  • ozone enters the dispensing dish 11 or subsequently into the tub 2 together with water.
  • ozone can in principle also be introduced as gas into the dispensing dish 11 and / or the tub 2.
  • flow meters are used for measuring flow velocities in FIG. 2 not shown.
  • the dispenser 11 is connected via a connecting tube (filling hose) 10 with the tub 2.
  • the dispenser 11 is connected via a first exhaust air duct 18 and the tub 2 via a second exhaust air duct 19 with an exhaust duct 17.
  • first exhaust partial duct 18 and second exhaust air duct 19 here not the connecting pipe 10 between dispenser 11 and tub 2.
  • first exhaust air duct 18 is also a first controllable closure device 33, such as flaps.
  • Ozone-containing air or ozone-containing aqueous liquid from the ozone generator 32 can pass through the dispensing tray 11 into the tub 2, the drum 3 and the connecting tube 10 connecting them.
  • located microorganisms that may be present as biofilms are attacked by the ozone.
  • the content of ozone in the air or in the aqueous liquid decreases beyond the extent due to the natural decomposition of the ozone.
  • the concentration c out of ozone detected by means of an ozone sensor (b) 27 can be used to determine the decrease in the ozone concentration due to these processes.
  • the position of the ozone sensor (b) 27 is hereby regarded as the exit from the cavity to be examined.
  • the concentration difference ⁇ c c in -c out - ⁇ c dec , where ⁇ c dec is a measure of the natural decomposition of ozone, to determine a Hygieneparameters H dyn evaluated.
  • the cavity to be examined may comprise the dispensing dish 11 or the tub 2.
  • the tub can be separated by means of the first controllable closure device 33 and a third controllable closure device 40.
  • ozone-containing air flows with closed third controllable closure device 40 and opened first controllable closure device 33 through the dispenser shell 11 and the first exhaust air part channel 18 in the exhaust air duct 17th
  • ozone-containing air may be introduced through the tub 2 and the second exhaust air duct 19 into the third openable closure device 40 and closed first controllable closure device 33 Exhaust duct 17 arrive.
  • ozone concentrations are measured by ozone sensor (a) 16 and ozone sensor (b) 27.
  • the second embodiment shown here also allows a targeted determination of the hygiene state of the dispenser shell 11.
  • an ozone sensor (c) 24 is arranged in the dispenser as a predetermined cavity. It can now be set in the Ein réelleschale 11 by introducing a known amount or concentration of ozone, a predetermined concentration c set of ozone. Alternatively, too an ozone concentration initially determined by the ozone sensor (c) 24 can be assumed to be c set , which represents a reference point for the method for determining the state of hygiene. In any case, to determine a hygiene parameter H stat as a measure of the hygiene state in the dispensing dish, the time decrease of the concentration c of ozone measured with the ozone sensor (c) 24 is evaluated.
  • the hygienic parameter H stat is the half-life t 0.5 of the concentration of ozone corrected for the natural decomposition of the ozone.
  • the method here can be separated from the remainder of the household appliance by closing devices not shown here in more detail.
  • drum 3 laundry items 7 and 6 are indicated to illustrate the washing machine. In carrying out the method for determining the state of hygiene, however, generally neither laundry nor washing liquor in the washing machine, as they can lead to an undesirable additional consumption of ozone.
  • a filter unit 28 which contains activated carbon as a carbon-containing material in the presently described embodiment.
  • the suction pump 21 is this purpose in Exhaust duct 17 between the ozone removing device 20 and the exhaust outlet 22 is arranged.
  • An ozone sensor (d) 31 for measuring an ozone content is disposed between the ozone removing device 20 and the suction pump 21. A proper functioning of the ozone removing device 20 is present when the ozone sensor (d) 31 can detect no or only extremely small amounts of ozone.
  • a display device 29 is located on the washing machine 1 of the specific embodiment shown here.
  • valve 9 in the tub 2 embodiments without heating, however, are conceivable.
  • the valve 9 as well as the heater 13 may be controlled by a controller 12 in accordance with a schedule associated with a timed program and / or the achievement of certain measurements of parameters such as liquor level, liquor temperature, drum speed, etc. within the washing machine can be.
  • the signals from the drive motor 14, pressure sensor 15, ozone generator 32, suction pump 21, ozone sensor (a) 16, ozone sensor (b) 27, ozone sensor (c) 24 and ozone sensor (d) 31 are fed to the controller 12, although for reasons the clarity is not shown in each case.
  • Fig. 2 means 15 a pressure sensor for the measurement of the hydrostatic pressure p in the tub 2, which results from the level of forming in the tub 2 free liquor.
  • the power of the suction pump 21 is variable in this embodiment, so that depending on a method for operating the washing machine optimum suction power can be adjusted.
  • the suction power may vary depending on whether a laundry treatment process using ozone, a hygiene condition determination method, or a sanitation method is performed.
  • Fig. 3 shows a vertical section through a household appliance, which is designed according to a third embodiment as a tumble dryer ("dryer"), in which by means of an air-to-air heat exchanger, a heat recovery takes place.
  • dryer a tumble dryer
  • the in Fig. 3 shown dryer 4 has a rotatable about a horizontal axis drum 3 as a drying chamber, within which Wäschemit Meeting 34 for moving laundry - not shown here - during a drum rotation are attached.
  • Process air is guided by means of a blower 35 via a heater 13 through the drum 3 in a process air duct 36.
  • the process air duct 36 is supplied via a supply air duct 37 room air or sucked by the blower 35.
  • the heated air from the heater 13 is from the rear, ie from the dryer door 38 opposite side of the drum 3, passed through the perforated bottom of the drum 3, comes there with the laundry to be dried in contact and flows through the filling opening of the drum third to a fluff grid 39 within the drying door 38 closing the filling opening.
  • the process air flow in the dryer door 38 is deflected downwards.
  • an air-air heat exchanger 42 in which the warm, laden with moisture process air (here: exhaust air) cooled and after condensation of the moisture contained in it is guided to the exhaust air outlet 43.
  • the separated moisture is collected in a condensate tray 44, from where it can be removed, for example, by pumping.
  • the dryer 4 via the supply air duct 37 supplied room air is used in the air-air heat exchanger 42.
  • This supply air is heated by the warm, laden with moisture process air and then before entering the drum 3 by means of heating 13.
  • the supply air flow can be regulated by a second controllable closure device 45 (for example a flap).
  • an apparatus for providing ozone 32 which here is an ozone generator, but also e.g. may be an opening for the supply of gaseous ozone, provided ozone, which is preferably used here as part of an ozone-containing gas via an ozone sensor (a) 16 in the drum 3 and then through the process air duct 36 and the exhaust duct 41 to passed the air-air heat exchanger 42.
  • ozone sensor (a) 16 With the aid of ozone sensor (a) 16 in the third embodiment shown here, at a set by means of the blower 35 flow rate v set for the ozone-containing air concentration c in ozone between the ozone generator 32 and the drum 3 as a reference value for in the Subsequent acceptance of the Ozone concentration measured.
  • the position of the ozone sensor (a) 16 is here considered as an entrance to the drum 3 as a cavity.
  • For better adjustability of the flow velocity can - not shown here - be present a flow meter.
  • the blower 35 arranged in the exhaust air duct 41 can extract ozone-containing air from an ozone supply line 25, the process air duct 36, the drum 3, the exhaust air duct 41 and the air-air heat exchanger 42, which in their entirety mean the cavity to be examined.
  • an ozone sensor (b) 27 is arranged.
  • the concentration c out of ozone determined by means of the ozone sensor (b) 27 can be used to determine the decrease in the ozone concentration due to the reaction with microorganisms or a biofilm.
  • the position of the ozone sensor (b) 27 is hereby regarded as the exit from the cavity to be examined.
  • the concentration difference ⁇ c c in -C out - ⁇ c dec , where ⁇ c dec is a measure of the natural decomposition of ozone, is evaluated to determine a hygiene parameter H dyn .
  • the set capacity of fan 35 may be different, depending on whether the dryer performs a method for drying laundry, a method for determining the hygiene state or a hygiene process.
  • the amount of ozone generated by the ozone generator 32 may be different. In general, lower levels of ozone are sufficient to carry out the method of determining the state of hygiene, while for a hygiene method generally a higher ozone concentration is chosen.
  • the drum 3 is at the in Fig. 3 embodiments shown at the rear bottom by means of a pivot bearing and front mounted by means of a bearing plate 46, the drum 3 rests with a brim on a sliding strip 47 on the bearing plate 46 and is held at the front end.
  • the control of the condensation dryer via a control device 12, which can be controlled by the user via an operating unit 48.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
EP11711935.4A 2010-04-30 2011-04-05 Verfahren zum erkennen eines betriebszustands in einem hausgerät und hierfür geeignetes hausgerät Active EP2563963B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11711935T PL2563963T3 (pl) 2010-04-30 2011-04-05 Sposób rozpoznawania stanu roboczego w urządzeniu domowym i odpowiednie do tego urządzenie domowe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010028447A DE102010028447A1 (de) 2010-04-30 2010-04-30 Verfahren zum Erkennen eines Betriebszustands in einem Hausgerät und hierfür geeignetes Hausgerät
PCT/EP2011/055247 WO2011134753A1 (de) 2010-04-30 2011-04-05 Verfahren zum erkennen eines betriebszustands in einem hausgerät und hierfür geeignetes hausgerät

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EP2563963A1 EP2563963A1 (de) 2013-03-06
EP2563963B1 true EP2563963B1 (de) 2015-10-21

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DE (1) DE102010028447A1 (pl)
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Publication number Priority date Publication date Assignee Title
DE102012209823A1 (de) * 2012-06-12 2013-12-12 BSH Bosch und Siemens Hausgeräte GmbH Haushaltsgerät mit einem Generator, insbesondere einem Ozongenerator, und einer Filtereinrichtung
DE102014224508A1 (de) * 2014-12-01 2016-06-02 BSH Hausgeräte GmbH Geschirrspülmaschine sowie Verfahren zum Betrieb einer solchen
CN109487495B (zh) * 2017-09-12 2021-07-06 博西华电器（江苏）有限公司 包含臭氧发生装置的洗衣机

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2433909A1 (de) 1974-07-15 1976-02-05 Sueddeutsche Metallwerke Gmbh Geraet zur pflege von kleidungsstuecken
GB9501461D0 (en) * 1994-06-20 1995-03-15 Capteur Sensors & Analysers Detection of ozone
DE4431139A1 (de) 1994-09-01 1996-03-07 Hoechst Ag Verfahren zur Ozoneliminierung aus Gasen und Flüssigkeiten
DE10237854A1 (de) * 2002-08-19 2004-03-04 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben eines wasserführenden Geräts und wasserführendes Gerät
DE10237853A1 (de) * 2002-08-19 2004-03-04 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Messen der Menge an organischen Stoffen in einer Flüssigkeit
GB2414023B (en) 2004-05-11 2008-04-09 Jla Ltd Washing machine, ozone dissolving apparatus and method of washing
GB2414743B (en) * 2004-06-04 2009-07-22 Jla Ltd A washing machine and method of washing
AU2006202541A1 (en) 2006-06-15 2008-01-10 Ozone Technologies Pty Limited System and Device for Introducing Ozone into a Washing Apparatus
EP2126181B1 (en) 2007-03-29 2011-08-17 Arçelik Anonim Sirketi A washing machine
US20080302139A1 (en) 2007-05-11 2008-12-11 Randy Zorn Ozone Laundry Systems

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PL2563963T3 (pl) 2016-04-29
WO2011134753A1 (de) 2011-11-03
EP2563963A1 (de) 2013-03-06
DE102010028447A1 (de) 2011-11-03

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