EP2074251B1 - Water-conducting domestic appliance comprising a detergent dosing system with fill level detection - Google Patents
Water-conducting domestic appliance comprising a detergent dosing system with fill level detection Download PDFInfo
- Publication number
- EP2074251B1 EP2074251B1 EP07802982.4A EP07802982A EP2074251B1 EP 2074251 B1 EP2074251 B1 EP 2074251B1 EP 07802982 A EP07802982 A EP 07802982A EP 2074251 B1 EP2074251 B1 EP 2074251B1
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- EP
- European Patent Office
- Prior art keywords
- detergent
- cartridge
- fill level
- dosing system
- chambers
- 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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- 239000003599 detergent Substances 0.000 title claims description 120
- 238000001514 detection method Methods 0.000 title description 15
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- 241001631457 Cannula Species 0.000 description 1
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Images
Classifications
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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
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/02—Devices for adding soap or other washing agents
- D06F39/022—Devices for adding soap or other washing agents in a liquid state
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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
- A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
- A47L15/4445—Detachable devices
- A47L15/4454—Detachable devices with automatic identification means, e.g. barcodes, RFID tags or magnetic strips
-
- 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
- A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
- A47L15/4463—Multi-dose dispensing arrangements
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
- A47L15/449—Metering controlling devices
Definitions
- the invention relates to a detergent dosing system according to the preamble of claim 1. Furthermore, the invention relates to a water-carrying household appliance.
- Most of the domestic dishwashers currently in use have an addition device for receiving one or more cleaning agents, which are added to the washing liquor in the course of a rinsing cycle for cleaning the items to be sorted in the dishwasher.
- the cleaning agent stored in the addition device is completely dispensed into the washing compartment during the washing cycle and added to the washing liquor circulated therein.
- the size of the addition device is such that just the amount of cleaning agent required for a rinsing cycle can be filled.
- the user of the dishwasher is therefore forced to add the amount of detergent required for the washing cycle to the addition device at the beginning of each washing cycle. This handling is inconvenient for the user of the dishwasher.
- Addition devices which add the amount of cleaning agents stored therein to the washing liquor at once do not allow more complex washing programs to be carried out. In certain situations, for example, it may be useful to add the detergent to the washing liquor at different times. Addition devices which are designed to take up a single detergent dose cannot support such complex rinsing cycles.
- a dishwasher with a metering device for adding additives into the washing container is known, in which basic chemicals are accommodated separately in storage containers and can be added independently.
- a water-carrying household appliance in particular a household dishwasher, has a detergent dosing system, the detergent dosing system having a detergent dispenser with a receiving space for receiving at least one cartridge, the cartridge being designed for storing at least one cleaning agent.
- the quantity of detergent stored is greater than the quantity required for a rinsing cycle and the detergent dosing system has a device for detecting a fill level in the at least one cartridge.
- the detergent dosing system for dishwashers can be designed to be arranged in the interior of the dishwasher, in particular adjacent to a washing compartment of the dishwasher.
- the detergent dosing system contains detergents, the amount of detergent stored being greater than the amount required for a rinse cycle.
- the detergent dosing system essentially provides exactly the amount of detergent that is necessary for a rinse cycle.
- Detergents can be compositions of detergent components or individual detergent substances, such as an enzyme.
- the cleaning agents can be liquid or gel-like.
- the detergent dosing system can be designed to emit a signal when a fill level, for example a predetermined fill level, is detected.
- the detergent dosing system has a plurality of separate chambers for the respective accommodation of detergents.
- the device for detecting the predetermined fill level is designed to determine the fill level of at least one, but not all, of the chambers.
- the detergent dosing system for dishwashers further comprises a second detection means for detecting the dosing processes that have been carried out since the full cartridge was inserted; and an evaluation means which determines the fill level of the cleaning agent in the cleaning agent dosing system from the information of at least the second detection means.
- the cleaning agent dosing system uses an indirect procedure according to the first and the further variant according to the invention.
- the first variant according to the invention not all of the chambers of the detergent dosing system are monitored for their fill level, but only the monitoring takes place in some of the chambers. On the basis of this determined information, the global level of detergent in the detergent dosing system can be concluded.
- the device for detecting the predetermined fill level can also be designed for detecting the fill level of exactly one chamber. This procedure ensures an economical and inexpensive construction.
- the detergent dosing system has a detergent dispenser with a receiving space for receiving at least one cartridge containing the detergents, and the device for detecting the predetermined fill level is formed in the detergent dispenser and / or the cartridge.
- the device for detecting the predetermined fill level works according to an optical principle.
- the device for the detection of a fill level has a light transmitter, a light receiver and a light guide, light radiation emitted by the light transmitter being able to be coupled into the light guide and light radiation emerging from the light guide being receivable by the light receiver, with an evaluation of the input and output values coupled light radiation can be checked whether the predetermined level is reached. The evaluation is based on a comparison of the light radiation that is coupled in and out.
- the light guide has a first coupling surface and a second coupling surface, the light radiation from the light transmitter being able to be coupled in through the first coupling surface and the light radiation emerging from the light guide being able to be coupled out through the first or the second coupling surface.
- the light transmitter and the light receiver can be designed as a structural unit.
- the light guide can be designed, for example, as a rod, the reflection properties of the light guide being exploited.
- the light transmitter and the light receiver are formed separately from one another.
- the light guide can be used as a helix, for example be trained by which the light radiation is directed. In both cases, the different refractive properties are used when the light guide is surrounded by cleaning agents compared to a situation where the light guide is not or only partially surrounded by cleaning agents.
- the light transmitter and the light receiver are arranged in the detergent dispenser.
- the light guide is arranged in the cartridge in which the cleaning agent is located. With the cartridge inserted in the detergent dispenser, the light transmitter or light receiver and light guide are arranged with respect to one another in such a way that the light coupling and coupling out described above can take place.
- a mechanism is preferably provided here, which ensures that the cartridge can only be inserted into the detergent dispenser in one way, so that the function of the detection device can be ensured. This can be done, for example, by mechanical coding on the cartridge, e.g. a projection and a corresponding recess on the detergent dispenser, and vice versa.
- the device for detecting a fill level works according to a capacitive principle.
- the device for detecting the predetermined fill level has a first and a second electrode with a dielectric arranged between the first and the second electrode, the first electrode being arranged in the cleaning agent dosing system in an electrically insulating manner by the cleaning agent and the second electrode and the predetermined level is determined by evaluating the voltage present between the first and the second electrode.
- the second electrode is formed from an electrically conductive material and can be arranged on the outer wall of the cartridge or on a housing wall of the detergent dispenser.
- the dielectric between the first and the second electrode is formed by the wall of the cartridge and / or the wall of the detergent dispenser and / or, if appropriate, an air gap.
- the level at which the signal is to be emitted by the length of the extension of the light guide in the cartridge in the direction of gravity or by the length of the extension of the second electrode in the direction of gravity. In this way, it can advantageously be set whether a signal should be emitted when the cartridge is completely empty or at a point in time when a number m, preferably between 2 and 5, of dosing processes is still contained in the detergent dosing system.
- the device for detecting the predetermined fill level works according to an acoustic principle.
- the device for the detection of a fill level has an excitation means with which the cleaning agent can be set in vibration and an evaluation means with which the resulting noise pattern can be evaluated.
- a generator operating according to the piezo-ultrasound principle can preferably be used as the excitation means.
- the second detection means detects the number of dosing processes and / or the volume derived from the detergent dosing system. Based on these parameters, a precise determination of the fill level is possible. By permanently comparing a predetermined fill level with the calculated fill level, the decision can be made as to whether to issue the signal which signals to the user that an exchange of the cartridge is necessary or is imminent.
- the detergent dosing system is provided with a transponder in one embodiment, the information stored in the transponder being readable by the first detection means for further evaluation.
- the cartridge can be provided with a code, in particular a bar code, for recognizing the new or full cartridge, the one in the Transponder stored information can be read out by the first detection means for further evaluation.
- the first detection means has a receiving device which can read out the information stored in the transponder as it approaches the receiving device.
- the system can work in a passive manner, ie the transponder attached to the cartridge does not require an independent energy supply. The energy required for reading is supplied to the transponder by the receiving device as soon as it is in its working area.
- the first detection means can have a bar code reader which is arranged in the detergent dosing system, so that the information contained in the bar code is read out automatically as soon as the cartridge is inserted into the detergent dosing system.
- the bar code reader can also be arranged on another assembly of a dishwasher, so that, for example, the user must guide the cartridge past the bar code reader before inserting the cartridge into the detergent dosing system.
- a structurally particularly simple construction of the device for detecting a predetermined fill level of the cleaning agent is obtained if the volume of the cleaning agents stored in the plurality of chambers is dimensioned such that a total of z rinsing cycles can be carried out and each of the cleaning agents is used up with the zth rinsing cycle is.
- This procedure ensures that the cartridge no longer contains any cleaning agents when it is replaced.
- This state is achieved in particular in that, according to a development of the invention, an equal percentage of the at least two cleaning agents is dosed by the dosing system in each wash cycle. It can be provided that the total number z of rinsing cycles when several cartridges are used up can be variable and is dependent on the rinsing cycles carried out in each case.
- This variant ensures that, regardless of the number of chambers that store cleaning agents, a single device for detecting the fill level (one of the chambers) is sufficient to reliably provide information about an empty cartridge or about a still possible number of dosing processes ,
- the invention also includes a detergent dosing system of the type described above.
- Fig. 1 shows a dishwasher 1 which has a door 3 pivotably mounted on a housing 2. The door 3 is shown in the figure in its open position. Dishware baskets 5, 6 are arranged in a known manner in a wash cabinet 4 which can be closed by the door 3.
- a detergent dosing system 10, comprising a detergent dispenser 11 and a cartridge 50 according to the invention, which contains at least two detergents stored separately from one another, is arranged in a container wall 7 of the housing 2.
- Fig. 1 shows the preferred arrangement of the detergent dosing system 10 between the upper basket 5 and the lower basket 6.
- the detergent dispenser 11 which receives the cartridge 50 is arranged in a section of the container wall 7 close to the door opening in order to introduce it and removing the cartridge 50 into or out of the detergent dispenser 11 for the user.
- the detergent dispenser 11 comprises a housing 12 and a cover which is pivotably mounted relative to the housing 12. If the lid is in its open position (see illustration in Fig. 1 ), the cartridge 50 can be inserted into the lid from the wash cabinet 4.
- the cover has, for example, two symmetrically arranged holding tabs which have an L-shaped shape and are adapted to the size of the cartridge 50, so that the holding tabs grip around the cartridge 50 after insertion (not shown).
- a support surface is also formed on the cover, so that the cartridge 50 comes to rest in a defined position.
- Fig. 2 shows another dishwasher 1 with a detergent dosing system 10.
- the detergent dosing system 10 more precisely the detergent dispenser 11 is arranged in the door 3 of the dishwasher.
- the detergent dispenser 11 is loaded with the cartridge 50 from the front 8 of the door.
- the opening for loading the detergent dispenser 11 can be arranged in the area of a cover of the dishwasher or the inside door of the door.
- the advantage of the arrangement according to Fig. 2 consists in a more convenient insertion and removal of the cartridge for the user.
- FIG Fig. 3 An exemplary embodiment of the cartridge 50 is shown in FIG Fig. 3 shown.
- the cartridge 50 has, by way of example only, five chambers 51a, 51b, 51c, 51d and 51e, each for receiving a cleaning agent or a cleaning agent mixture.
- the size of the individual chambers 51a to 51e is dimensioned in accordance with the volume required during a predetermined number of dosing processes.
- the volume of the different cleaning agents in the chambers 51a to 51e is dimensioned such that after a certain number of dosing processes, preferably between 20 and 40, more preferably approx. 30, all of the chambers 51a to 51e are emptied simultaneously and essentially completely.
- the total number of dosing processes when the cartridge is used up depends on the type of rinsing cycle carried out. In order to meet the different requirements, a certain dosing quantity is specified for each program that can be selected in the dishwasher, or it is determined by sensors. In the case of lightly soiled wash items, a lower dosage is selected, while in the case of heavily soiled wash items, a higher amount of detergent is provided. To ensure that each of the detergents with the same rinse cycle is used up, the percentage of each detergent component that is added to the rinse liquor during a dosing process is the same. This enables economical use of the available resources, since the cartridge can only be replaced when it is completely empty.
- the cleaning agent can only be conveyed using gravity.
- the conveying device in particular the configuration of the seal, can also be constructed according to the principle of a pump, so that cleaning agents are conveyed from the cleaning chamber into the metering chamber and from the metering chamber into the washing area.
- Each of the chambers 51a to 51e is provided with an openable closure 25a to 25e, e.g. provided in the form of a membrane.
- the e.g. Membranes made of rubber seal off the individual chambers 51a to 51e so that no cleaning agent can escape from the cartridge 50 during storage and transportation.
- the membranes are pierced by cannulas 21 correspondingly arranged in the detergent dispenser 11, so that detergent can be added to the washing compartment in accordance with a corresponding metering device.
- the cartridge is preferably made of a plastic and has a width B of approximately 200 mm, a height H of approximately 125 mm and a depth of approximately 25 mm. With these dimensions, the volume of the various chambers can be dimensioned such that the desired 20 to 40 rinsing cycles can be carried out by means of a cartridge.
- the cartridge 50 has a further chamber 52 which is connected to one or more ventilation channels 53.
- the ventilation channel or channels 53 in turn have a connection to the various chambers 51a to 51e. This ensures that with increasing emptying of the chambers 51a to 51e no negative pressure can build up in them, which would make the addition of cleaning agents more difficult or falsified.
- the ventilation channels 53 are preferably located in a cover 54, which is applied to the housing of the cartridge after the individual chambers 51a to 51e have been filled with the respective cleaning agents.
- the cover 54 can have a pressure relief valve 55, which may be necessary for certain detergent components.
- the detergent dosing system has means to query the fill level of the detergent in the cartridge. If the cleaning agent reaches a predetermined fill level in one or more of the chambers of the cartridge, e.g. if a predetermined number of rinsing cycles is still possible, this can be displayed to the user via an optical signal.
- the display device may e.g. on the outside of the door, e.g. the aperture.
- a section of the detergent dosing system 10 is shown in a cross-sectional illustration.
- the cartridge 50 is located in a receiving space of the detergent dosing system formed by the detergent dispenser 11.
- the housing shape of the cartridge 50 is adapted to the shape of the housing 12 of the detergent dispenser 11.
- the cannula 21a of the chamber 51a arranged at the bottom of a housing step of the housing 12 pierces the openable closure 25a of the cartridge 50 and projects into the chamber 51a.
- the end of the cannula 21a projecting into the chamber 51a is arranged as close as possible to the bottom of the cartridge 50 in order to avoid that a residue of cleaning agent remains in the cartridge.
- the detection of a predetermined fill level of cleaning agent is carried out using a transmitting / receiving unit 60, which is located on the bottom of the housing 12 of the Detergent dispenser 11 is arranged.
- a light guide element 61 such as a lens, is flush with the bottom of the housing 12.
- a light guide 62 for example made of plastic or glass, is fastened in the housing base of the cartridge 50. Is the cartridge 50, as in Fig. 4 shown, inserted in the detergent dispenser 11, a first coupling surface 63 of the light guide 62 (which is flush with the bottom of the housing of the cartridge 50) adjoins the light guide element 61. In this way, light emitted by the transceiver 60 can be coupled into the light guide 62.
- the injected light radiation is reflected on a second coupling surface 64 of the light guide 62 and is fed back to the light receiver via the coupling surface 63.
- An evaluation, in particular a comparison, of the light radiation that is coupled in and out can determine whether the second coupling surface 64 is located within the cleaning agent or outside of it. In these two cases there are different refractive properties on the second coupling surface 64, which can be easily detected by an evaluation unit.
- the light radiation emitted by the light transmitter can be coupled in at a first coupling surface and can be coupled out at a second coupling surface of the light guide.
- the second coupling surface is likewise formed in the bottom of the cartridge 50.
- the length or height with which the light guide 62 projects upward into the cartridge 50 in the direction of the force of gravity can be used to determine at which level or volume of the cleaning agent a signal is to be emitted.
- a predetermined level is detected by a capacitive principle.
- a first electrode 70 is formed by the cleaning agent stored in the chamber 51a.
- a second electrode 71 which is formed by an electrically conductive material, is arranged, for example, on the outer wall of the housing of the cartridge 50 or on the wall of the detergent dispenser 11 facing the cartridge.
- the housing wall 72 of the cartridge 50 lying between the first and the second electrode 70, 71 forms a dielectric of the capacitor.
- the first electrode formed by the cleaning agent can be electrically contacted, for example, by a conductive conductor on the cannula 21a.
- the level is detected by evaluating the voltage present between the first and second electrodes 70, 71, which varies depending on the level in the chamber 51a.
- the variation results from the degree of overlap of the cleaning agent with the second electrode 71 of the capacitor.
- the drop below a predetermined fill level can be detected.
- the second electrode 71 can extend over the entire width of the chamber 51a or over the entire width of the cartridge and at any height of the cartridge.
- the height in the upward direction of gravity can be used to determine at which point in time a change in voltage should be detectable for the first time.
- the output of a signal can thus be set at a predetermined fill level by the height of the second electrode.
- the level in the chamber 51a is detected on the basis of an acoustic principle.
- the detergent dosing system 10 is provided with an excitation means 80, for example a piezo ultrasound generator, which is arranged on the detergent dispenser 11 in such a way that it can vibrate the detergent located in the cartridge 50.
- the resulting noise can be detected and evaluated by an evaluation means, which is arranged, for example, outside the receiving space of the cartridge 50.
- the level of the detergent in the cartridge can be inferred in a simple manner based on the noise spectrum. By comparing the measured spectrum with a stored spectrum, a signal can be emitted at a predetermined fill level.
- Another device, not shown in the figures, for monitoring the level of detergent in the cartridge uses an indirect determination, in that the dishwasher has a detection means for detecting a full cartridge, for example a transceiver system transceiver system or a bar code, and a detection means for detecting the dispensing operations carried out since the full cartridge was inserted.
- the latter preferably records the number of dosing processes and that from the detergent dosing system rejected volume of detergent.
- the absolute fill level of the detergent in the detergent dosing system can be determined in a simple manner from this information.
- the cleaning agents contained in the cartridge 50 are only gradually metered into the wash cabinet, more precisely the wash liquor circulated in the wash cabinet, in the course of a plurality of wash cycles, they are exposed to considerable absolute temperatures and temperature fluctuations with each wash cycle.
- at least one housing wall of the cartridge 50 facing the washing area and / or the lid of the cleaning agent metering system 10 facing the washing area is made of an insulating material or with insulation surround.
- the insulation can be formed by a gas volume arranged in the cover or the relevant housing section of the cartridge. This gas volume producing the insulation can be introduced during the manufacture of the cover or the cartridge.
- the method used here is known as the internal gas pressure method (GID).
- the detergent dispenser 11 can have a further chamber for holding a solid detergent.
- the solid cleaning agent can be, for example, a 3-in-1 tab which is inserted into the further chamber if there is no or an empty cartridge 50 in the receiving space.
- the provision of the further chamber for receiving a solid cleaning agent makes it possible to use the dishwasher even when the cartridge 50 is empty and no filled cartridge is available.
- the further chamber can have an opening which is connected to the surroundings of the dishwasher.
- the opening can be connected to the environment via channels which run on the back of the container wall.
- the detergent dosing system thus integrates the functionality of a so-called “expansion opening", which is used to discharge the excess pressure that arises in the wash cabinet when the dishwasher is e.g. B. during a Rinsing cycle with already warmed up washing liquor is opened and closed again by the user. The excess pressure which arises at this moment can then be dissipated to the surroundings via the further chamber and the opening.
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Description
Die Erfindung betrifft ein Reinigungsmitteldosiersystem nach dem Oberbegriff des Patentanspruch 1. Ferner betrifft die Erfindung ein wasserführendes Haushaltsgerät.The invention relates to a detergent dosing system according to the preamble of claim 1. Furthermore, the invention relates to a water-carrying household appliance.
Die Mehrzahl der derzeit im Einsatz befindlichen Haushalts-Geschirrspülmaschinen besitzt eine Zugabevorrichtung zur Aufnahme eines oder mehrerer Reinigungsmittel, welche im Verlauf eines Spülzyklus der Spülflotte zum Reinigen des in der Geschirrspülmaschine einsortierten Spülguts zugegeben werden. Üblicherweise wird das in der Zugabevorrichtung bevorratete Reinigungsmittel während des Spülzyklus vollständig in den Spülraum abgegeben und der darin umgewälzten Spülflotte beigemischt. Die Zugabevorrichtung ist von ihrer Größe her derart bemessen, dass gerade die für einen Spülzyklus benötigte Menge an Reinigungsmitteln eingefüllt werden kann. Der Benutzer der Geschirrspülmaschine ist deshalb gezwungen, zum Beginn jedes Spülzyklus die für den Spülzyklus benötigte Menge an Reinigungsmittel in die Zugabevorrichtung einzufüllen. Diese Handhabung ist für den Benutzer der Geschirrspülmaschine unbequem. Darüber hinaus besteht bei derartigen Geschirrspülmaschinen das Problem, dass die Menge an in die Zugabevorrichtung eingefüllten Reinigungsmitteln von Benutzer zu Benutzer, aber auch von Spülgang zu Spülgang variieren kann. Eine nicht korrekt dosierte Menge an Reinigungsmittel kann einerseits zu unbefriedigenden Spülergebnissen führen, wenn die Reinigungsmittel zu gering dosiert wurden, und andererseits eine Verschwendung an Reinigungsmitteln und damit eine Belastung der Umwelt zur Folge haben, wenn eine zu große Menge an Reinigungsmitteln dosiert wurde.Most of the domestic dishwashers currently in use have an addition device for receiving one or more cleaning agents, which are added to the washing liquor in the course of a rinsing cycle for cleaning the items to be sorted in the dishwasher. Usually, the cleaning agent stored in the addition device is completely dispensed into the washing compartment during the washing cycle and added to the washing liquor circulated therein. The size of the addition device is such that just the amount of cleaning agent required for a rinsing cycle can be filled. The user of the dishwasher is therefore forced to add the amount of detergent required for the washing cycle to the addition device at the beginning of each washing cycle. This handling is inconvenient for the user of the dishwasher. In addition, there is the problem with such dishwashers that the amount of cleaning agents filled into the addition device can vary from user to user, but also from wash cycle to wash cycle. An incorrectly dosed amount of detergent can lead to unsatisfactory washing results if the detergent has been dosed too little, and on the other hand wastes of detergent and thus has a negative impact on the environment if an excessive amount of detergent has been dosed.
Zugabevorrichtungen, welche die darin gespeicherte Menge an Reinigungsmitteln auf einmal der Spülflotte zusetzen, lassen weiterhin die Durchführung komplexerer Spülprogramme nicht zu. So kann es beispielsweise in bestimmten Situationen sinnvoll sein, das Reinigungsmittel zu verschiedenen Zeitpunkten der Spülflotte zuzudosieren. Zugabevorrichtungen, welche zur Aufnahme einer einzigen Reinigungsmittel-Dosis ausgebildet sind, können derartige komplexe Spülzyklen nicht unterstützen.Addition devices which add the amount of cleaning agents stored therein to the washing liquor at once do not allow more complex washing programs to be carried out. In certain situations, for example, it may be useful to add the detergent to the washing liquor at different times. Addition devices which are designed to take up a single detergent dose cannot support such complex rinsing cycles.
Aus der
Bei Reinigungsmitteldosiersystemen, bei denen mehrere Reinigungsmittel in unterschiedlichen Kammern einer Kartusche oder Vorratsbehältern gespeichert sind, besteht das Problem, dass bei einer sensorgesteuerten Zugabe der Reinigungsmittel - je nach Verschmutzungsgrad der Spülflotte - die Reinigungsmittel zu unterschiedlichen Zeitpunkten erschöpft sein können. Insbesondere bei solchen Kartuschen, in welchen die Kammern in einem gemeinsamen Gehäuse der Kartusche angeordnet sind, kann dies einen Austausch der Kartusche erfordern, wenn manche der Reinigungsmittel noch nicht verbraucht sind. Diese Verschwendung von Reinigungsmitteln führt zu einer Belastung der Umwelt, wenn die Kartusche z.B. über den Müll entsorgt wird.The problem with detergent dosing systems, in which several detergents are stored in different chambers of a cartridge or storage container, is that when the detergent is added in a sensor-controlled manner - depending on the degree of soiling of the washing liquor - the detergents can be exhausted at different times. Particularly in the case of cartridges in which the chambers are arranged in a common housing of the cartridge, this can require replacement of the cartridge if some of the cleaning agents have not yet been used up. This waste of detergents leads to environmental pollution if the cartridge e.g. is disposed of as garbage.
Es ist daher Aufgabe der vorliegenden Erfindung, ein wasserführendes Haushaltsgerät anzugeben, welches auf konstruktiv einfache Weise die Signalisierung eines vorbestimmten Füllstands von Reinigungsmitteln in einer Kartusche ermöglicht. Ferner ist es Aufgabe der Erfindung, ein entsprechendes Reinigungsmitteldosiersystem bereitzustellen.It is therefore an object of the present invention to provide a water-carrying household appliance which enables the signaling of a predetermined fill level of cleaning agents in a cartridge in a structurally simple manner. It is also an object of the invention to provide a corresponding detergent dosing system.
Diese Aufgaben werden durch ein Reinigungsmitteldosiersystem mit den Merkmalen des Patentanspruchs 1 bzw. durch ein wasserführendes Haushaltsgerät mit den Merkmalen des Patentanspruchs 3 gelöst.These tasks are solved by a detergent dosing system with the features of claim 1 or by a water-carrying household appliance with the features of
Ein wasserführendes Haushaltsgerät, insbesondere eine Haushalts-Geschirrspülmaschine, weist ein Reinigungsmitteldosiersystem auf, wobei das Reinigungsmitteldosiersystem einen Reinigungsmittelspender mit einem Aufnahmeraum zur Aufnahme wenigstens einer Kartusche aufweist, wobei die Kartusche zur Bevorratung wenigstens einen Reinigungsmittels ausgebildet ist. Dabei ist die bevorratete Menge an Reinigungsmittel größer als die für einen Spülzyklus benötigte Menge und das Reinigungsmitteldosiersystem weist eine Vorrichtung zur Detektion eines Füllstands in der wenigstens einen Kartusche auf.A water-carrying household appliance, in particular a household dishwasher, has a detergent dosing system, the detergent dosing system having a detergent dispenser with a receiving space for receiving at least one cartridge, the cartridge being designed for storing at least one cleaning agent. The quantity of detergent stored is greater than the quantity required for a rinsing cycle and the detergent dosing system has a device for detecting a fill level in the at least one cartridge.
Das Reinigungsmitteldosiersystem für Geschirrspülmaschinen kann zur Anordnung, insbesondere angrenzend an einen Spülraum der Geschirrspülmaschine, im Inneren der Geschirrspülmaschine ausgebildet sein. Das Reinigungsmitteldosiersystem enthält Reinigungsmittel, wobei die bevorratete Menge an Reinigungsmittel größer als die für einen Spülzyklus benötigte Menge ist. Das Reinigungsmitteldosiersystem stellt im Wesentlichen genau die Menge an Reinigungsmittel bereit, die für einen Spülzyklus notwendig ist. Reinigungsmittel können Zusammensetzungen von Reinigerkomponenten sein oder einzelne Reinigersubstanzen, wie bspw. ein Enzym. Die Reinigungsmittel können flüssig oder auch gelförmig sein. Das Reinigungsmitteldosiersystem kann zur Abgabe eines Signals bei einer Detektion eines Füllstands, bspw. eines vorbestimmten Füllstands ausgebildet sein. Gemäß einer ersten erfindungsgemäßen Variante weist das Reinigungsmitteldosiersystem eine Mehrzahl an voneinander getrennten Kammern zur jeweiligen Aufnahme von Reinigungsmitteln auf. Die Vorrichtung zur Detektion des vorbestimmten Füllstands ist dazu ausgebildet, den Füllstand zumindest einer, jedoch nicht sämtlicher, der Kammern zu ermitteln.The detergent dosing system for dishwashers can be designed to be arranged in the interior of the dishwasher, in particular adjacent to a washing compartment of the dishwasher. The detergent dosing system contains detergents, the amount of detergent stored being greater than the amount required for a rinse cycle. The detergent dosing system essentially provides exactly the amount of detergent that is necessary for a rinse cycle. Detergents can be compositions of detergent components or individual detergent substances, such as an enzyme. The cleaning agents can be liquid or gel-like. The detergent dosing system can be designed to emit a signal when a fill level, for example a predetermined fill level, is detected. According to a first variant of the invention, the detergent dosing system has a plurality of separate chambers for the respective accommodation of detergents. The device for detecting the predetermined fill level is designed to determine the fill level of at least one, but not all, of the chambers.
Gemäß einer weiteren Variante umfasst das Reinigungsmitteldosiersystem für Geschirrspülmaschinen ferner ein zweites Detektionsmittel zum Erfassen der seit dem Einlegen der vollen Kartusche durchgeführten Dosiervorgänge; und ein Auswertemittel, welches aus den Informationen zumindest des zweiten Detektionsmittels den Füllstand des Reinigungsmittels in dem Reinigungsmitteldosiersystem ermittelt.According to a further variant, the detergent dosing system for dishwashers further comprises a second detection means for detecting the dosing processes that have been carried out since the full cartridge was inserted; and an evaluation means which determines the fill level of the cleaning agent in the cleaning agent dosing system from the information of at least the second detection means.
Zur Signalisierung eines vorbestimmten Füllstands - sämtlicher in der Kartusche enthaltenen Reinigungsmittel - bedient sich das erfindungsgemäße Reinigungsmitteldosiersystem gemäß der ersten erfindungsgemäßen und der weiteren Variante eines indirekten Vorgehens. Gemäß der ersten erfindungsgemäßen Variante werden nicht sämtliche der Kammern des Reinigungsmitteldosiersystems hinsichtlich deren Füllstands überwacht, sondern es erfolgt lediglich die Überwachung in einigen der Kammern. Anhand dieser ermittelten Informationen kann auf den globalen Füllstand an Reinigungsmittel in dem Reinigungsmitteldosiersystem geschlossen werden.To signal a predetermined fill level - of all cleaning agents contained in the cartridge - the cleaning agent dosing system according to the invention uses an indirect procedure according to the first and the further variant according to the invention. According to the first variant according to the invention, not all of the chambers of the detergent dosing system are monitored for their fill level, but only the monitoring takes place in some of the chambers. On the basis of this determined information, the global level of detergent in the detergent dosing system can be concluded.
Bei dem Reinigungsmitteldosiersystem gemäß der weiteren Variante erfolgt keine unmittelbare Messung des Füllstandes des in dem Reinigungsmitteldosiersystem befindlichen Reinigungsmittels, sondern es werden die seit dem Einlegen einer vollen Kartusche durchgeführten Dosiervorgänge überwacht und anhand der bei den Dosiervorgängen ermittelten und gespeicherten Informationen auf den Füllstand rückgeschlossen.In the detergent dosing system according to the further variant, there is no direct measurement of the fill level of the detergent located in the detergent dosing system, but rather the level that has been reached since a full one Cartridge dosing processes monitored and based on the information determined and stored in the dosing processes inferred on the level.
Erfindungsgemäß kann die Vorrichtung zur Detektion des vorbestimmten Füllstands auch zur Detektion des Füllstands genau einer Kammer ausgebildet sein. Diese Vorgehensweise gewährleistet eine wirtschaftliche und kostengünstige Konstruktion.According to the invention, the device for detecting the predetermined fill level can also be designed for detecting the fill level of exactly one chamber. This procedure ensures an economical and inexpensive construction.
Gemäß einer weiteren Ausführungsform weist das Reinigungsmitteldosiersystem einen Reinigungsmittelspender mit einem Aufnahmeraum zur Aufnahme wenigstens einer, die Reinigungsmittel enthaltende, Kartusche auf, und die Vorrichtung zur Detektion des vorbestimmten Füllstands ist in dem Reinigungsmittelspender und/oder der Kartusche ausgebildet.According to a further embodiment, the detergent dosing system has a detergent dispenser with a receiving space for receiving at least one cartridge containing the detergents, and the device for detecting the predetermined fill level is formed in the detergent dispenser and / or the cartridge.
Gemäß der Erfindung arbeitet die Vorrichtung zur Detektion des vorbestimmten Füllstands nach einem optischen Prinzip. Die Vorrichtung zur Detektion eines Füllstands weist hierzu einen Lichtsender, einen Lichtempfänger sowie einen Lichtleiter auf, wobei von dem Lichtsender abgegebene Lichtstrahlung in den Lichtleiter einkoppelbar ist und aus dem Lichtleiter austretende Lichtstrahlung durch den Lichtempfänger aufnehmbar ist, wobei durch eine Auswertung der ein- und der ausgekoppelten Lichtstrahlung überprüfbar ist, ob der vorbestimmte Füllstand erreicht ist. Die Auswertung erfolgt anhand eines Vergleichs der ein- und ausgekoppelten Lichtstrahlung.According to the invention, the device for detecting the predetermined fill level works according to an optical principle. For this purpose, the device for the detection of a fill level has a light transmitter, a light receiver and a light guide, light radiation emitted by the light transmitter being able to be coupled into the light guide and light radiation emerging from the light guide being receivable by the light receiver, with an evaluation of the input and output values coupled light radiation can be checked whether the predetermined level is reached. The evaluation is based on a comparison of the light radiation that is coupled in and out.
Erfindungsgemäß weist der Lichtleiter eine erste Koppelfläche und eine zweite Koppelfläche auf, wobei die Lichtstrahlung von dem Lichtsender durch die erste Koppelfläche einkoppelbar und die aus dem Lichtleiter austretende Lichtstrahlung durch die erste oder die zweite Koppelfläche auskoppelbar ist. Wird die aus dem Lichtleiter austretende Lichtstrahlung durch die erste Koppelfläche ausgekoppelt, so können der Lichtsender und der Lichtempfänger als Baueinheit ausgebildet werden. Der Lichtleiter kann beispielsweise als Stab ausgebildet sein, wobei die Reflexionseigenschaften des Lichtleiters ausgenutzt werden. Wird die aus dem Lichtleiter austretende Lichtstrahlung durch die zweite Koppelfläche ausgekoppelt, so sind der Lichtsender und der Lichtempfänger getrennt voneinander ausgebildet. Der Lichtleiter kann z.B. als Wendel ausgebildet werden, durch die die Lichtstrahlung gelenkt wird. In beiden Fällen werden die unterschiedlichen Brechungseigenschaften ausgenutzt, wenn der Lichtleiter von Reinigungsmitteln umgeben ist im Vergleich zu einer Situation, wo der Lichtleiter nicht oder nur zum Teil von Reinigungsmitteln umgeben ist.According to the invention, the light guide has a first coupling surface and a second coupling surface, the light radiation from the light transmitter being able to be coupled in through the first coupling surface and the light radiation emerging from the light guide being able to be coupled out through the first or the second coupling surface. If the light radiation emerging from the light guide is coupled out through the first coupling surface, the light transmitter and the light receiver can be designed as a structural unit. The light guide can be designed, for example, as a rod, the reflection properties of the light guide being exploited. If the light radiation emerging from the light guide is coupled out through the second coupling surface, the light transmitter and the light receiver are formed separately from one another. The light guide can be used as a helix, for example be trained by which the light radiation is directed. In both cases, the different refractive properties are used when the light guide is surrounded by cleaning agents compared to a situation where the light guide is not or only partially surrounded by cleaning agents.
Gemäß einer weiteren Ausführungsform sind der Lichtsender und der Lichtempfänger in dem Reinigungsmittelspender angeordnet. Der Lichtleiter ist in der Kartusche angeordnet, in welcher sich das Reinigungsmittel befindet. Bei in dem Reinigungsmittelspender eingesetzter Kartusche sind Lichtsender bzw. Lichtempfänger und Lichtleiter derart zueinander angeordnet, dass die oben beschriebene Lichtein- und Lichtauskopplung erfolgen kann. Bevorzugt ist hierbei ein Mechanismus vorgesehen, der sicherstellt, dass die Kartusche nur in einer Weise in den Reinigungsmittelspender eingesetzt werden kann, so dass die Funktion der Detektionsvorrichtung gewährleistet werden kann. Dies kann beispielsweise durch eine mechanische Kodierung an der Kartusche, z.B. einen Vorsprung und eine entsprechende Ausnehmung an dem Reinigungsmittelspender, und umgekehrt, sichergestellt werden.According to a further embodiment, the light transmitter and the light receiver are arranged in the detergent dispenser. The light guide is arranged in the cartridge in which the cleaning agent is located. With the cartridge inserted in the detergent dispenser, the light transmitter or light receiver and light guide are arranged with respect to one another in such a way that the light coupling and coupling out described above can take place. A mechanism is preferably provided here, which ensures that the cartridge can only be inserted into the detergent dispenser in one way, so that the function of the detection device can be ensured. This can be done, for example, by mechanical coding on the cartridge, e.g. a projection and a corresponding recess on the detergent dispenser, and vice versa.
Gemäß einer anderen, nicht beanspruchten Variante arbeitet die Vorrichtung zur Detektion eines Füllstands nach einem kapazitiven Prinzip. Die Vorrichtung zur Detektion des vorbestimmen Füllstands weist eine erste und eine zweite Elektrode mit einem zwischen der ersten und der zweiten Elektrode angeordneten Dielektrikum auf, wobei die erste Elektrode durch das Reinigungsmittel und die zweite Elektrode elektrisch isolierend von der ersten Elektrode in dem Reinigungsmitteldosiersystem angeordnet ist und der vorbestimmte Füllstand durch Auswertung der zwischen der ersten und der zweiten Elektrode anliegenden Spannung erfolgt. Die zweite Elektrode ist aus einem elektrisch leitenden Material gebildet und kann an der Außenwand der Kartusche oder einer Gehäusewand des Reinigungsmittelspenders angeordnet sein. Das Dielektrikum zwischen der ersten und der zweiten Elektrode wird durch die Wandung der Kartusche und/oder die Wandung des Reinigungsmittelspenders und/oder ggf. einen Luftspalt gebildet. Dies ist im Wesentlichen von der Anordnung der zweiten Elektrode abhängig. Mit sinkendem Füllstand des Reinigungsmittels in der Kartusche ändert sich die Kapazität des durch die erste und die zweite Elektrode gebildeten Kondensators, welche ohne weiteres anhand der zwischen der ersten und der zweiten Elektrode anliegenden Spannung auswertbar ist. Anhand dieser Daten ist ein Rückschluss auf den Füllstand des Reinigungsmittels in der Kartusche möglich.According to another variant which is not claimed, the device for detecting a fill level works according to a capacitive principle. The device for detecting the predetermined fill level has a first and a second electrode with a dielectric arranged between the first and the second electrode, the first electrode being arranged in the cleaning agent dosing system in an electrically insulating manner by the cleaning agent and the second electrode and the predetermined level is determined by evaluating the voltage present between the first and the second electrode. The second electrode is formed from an electrically conductive material and can be arranged on the outer wall of the cartridge or on a housing wall of the detergent dispenser. The dielectric between the first and the second electrode is formed by the wall of the cartridge and / or the wall of the detergent dispenser and / or, if appropriate, an air gap. This essentially depends on the arrangement of the second electrode. As the fill level of the cleaning agent in the cartridge falls, the capacitance of the capacitor formed by the first and second electrodes changes, which capacitance is readily determined on the basis of the voltage applied between the first and second electrodes is evaluable. Based on this data, it is possible to draw a conclusion about the level of the cleaning agent in the cartridge.
In den beiden beschriebenen Varianten ist es möglich, durch die Länge der Erstreckung des Lichtleiters in der Kartusche in Schwerkraftrichtung bzw. durch die Länge der Erstreckung der zweiten Elektrode in Schwerkraftrichtung den Füllstand einzustellen, bei welchem das Signal abzugeben ist. Hierdurch kann in vorteilhafter Weise eingestellt werden, ob ein Signal bei vollständig entleerter Kartusche oder aber bereits zu einem Zeitpunkt abgegeben werden soll, wenn eine Anzahl m, bevorzugt zwischen 2 und 5, Dosiervorgängen noch in dem Reinigungsmitteldosiersystem enthalten ist.In the two variants described, it is possible to set the level at which the signal is to be emitted by the length of the extension of the light guide in the cartridge in the direction of gravity or by the length of the extension of the second electrode in the direction of gravity. In this way, it can advantageously be set whether a signal should be emitted when the cartridge is completely empty or at a point in time when a number m, preferably between 2 and 5, of dosing processes is still contained in the detergent dosing system.
Gemäß einer weiteren nicht beanspruchten Variante arbeitet die Vorrichtung zur Detektion des vorbestimmten Füllstands nach einem akustischen Prinzip. Dazu weist die Vorrichtung zur Detektion eines Füllstands ein Anregungsmittel, mit welchem das Reinigungsmittel in Schwingungen versetzbar ist, und ein Auswertemittel auf, mit welchem das dabei entstehende Geräuschbild auswertbar ist. Als Anregungsmittel kann hierbei bevorzugt ein nach dem Piezo-Ultraschallprinzip arbeitender Generator eingesetzt werden.According to a further variant, which is not claimed, the device for detecting the predetermined fill level works according to an acoustic principle. For this purpose, the device for the detection of a fill level has an excitation means with which the cleaning agent can be set in vibration and an evaluation means with which the resulting noise pattern can be evaluated. A generator operating according to the piezo-ultrasound principle can preferably be used as the excitation means.
In dem gemäß der zweiten Variante ausgestalteten Reinigungsmitteldosiersystem erfasst das zweite Detektionsmittel gemäß einer Ausführungsform die Anzahl der Dosiervorgänge und/oder das jeweils aus dem Reinigungsmitteldosiersystem ausgeleitete Volumen. Anhand dieser Parameter ist eine präzise Bestimmung des Füllstandes möglich. Durch einen permanenten Vergleich eines vorbestimmen Füllstandes mit dem errechneten Füllstand ist die Entscheidung treffbar, ob das Signal abzugeben ist, mit welchem dem Benutzer signalisiert wird, dass ein Austausch der Kartusche notwendig ist oder in Kürze bevorsteht.In the detergent dosing system designed according to the second variant, the second detection means, according to one embodiment, detects the number of dosing processes and / or the volume derived from the detergent dosing system. Based on these parameters, a precise determination of the fill level is possible. By permanently comparing a predetermined fill level with the calculated fill level, the decision can be made as to whether to issue the signal which signals to the user that an exchange of the cartridge is necessary or is imminent.
Zur automatischen Erkennung einer neuen bzw. vollen Kartusche ist das Reinigungsmitteldosiersystem gemäß der zweiten Variante in einer Ausgestaltung mit einem Transponder versehen, wobei die in dem Transponder gespeicherten Informationen durch das erste Detektionsmittel zur weiteren Auswertung auslesbar sind. Alternativ kann die Kartusche mit einem Code, insbesondere einem Bar-Code, zur Erkennung der neuen bzw. vollen Kartusche versehen sein, wobei die in dem Transponder gespeicherten Informationen durch das erste Detektionsmittel zur weiteren Auswertung auslesbar sind. Im ersten Fall weist das erste Detektionsmittel eine Empfangsvorrichtung auf, welche die in dem Transponder gespeicherten Informationen bei Annäherung an die Empfangseinrichtung auslesen kann. Das System kann hierbei auf passive Weise arbeiten, d.h. der an der Kartusche angebrachte Transponder benötigt keine autarke Energieversorgung. Die zum Auslesen notwendige Energie wird dem Transponder durch die Empfangseinrichtung zugeführt, sobald sich dieser in dessen Arbeitsfeld befindet.For the automatic detection of a new or full cartridge, the detergent dosing system according to the second variant is provided with a transponder in one embodiment, the information stored in the transponder being readable by the first detection means for further evaluation. Alternatively, the cartridge can be provided with a code, in particular a bar code, for recognizing the new or full cartridge, the one in the Transponder stored information can be read out by the first detection means for further evaluation. In the first case, the first detection means has a receiving device which can read out the information stored in the transponder as it approaches the receiving device. The system can work in a passive manner, ie the transponder attached to the cartridge does not require an independent energy supply. The energy required for reading is supplied to the transponder by the receiving device as soon as it is in its working area.
Das erste Detektionsmittel kann zu diesem Zweck über einen Bar-Code-Leser verfügen, welcher in dem Reinigungsmitteldosiersystem angeordnet ist, so dass ein automatisches Auslesen der in dem Bar-Code enthaltenen Informationen erfolgt, sobald die Kartusche in das Reinigungsmitteldosiersystem eingelegt wird. Der Bar-Code-Leser kann jedoch auch an einer anderen Baugruppe einer Geschirrspülmaschine angeordnet sein, so dass beispielsweise der Nutzer vor dem Einlegen der Kartusche in das Reinigungsmitteldosiersystem die Kartusche an dem Bar-Code-Leser vorbeiführen muss.For this purpose, the first detection means can have a bar code reader which is arranged in the detergent dosing system, so that the information contained in the bar code is read out automatically as soon as the cartridge is inserted into the detergent dosing system. However, the bar code reader can also be arranged on another assembly of a dishwasher, so that, for example, the user must guide the cartridge past the bar code reader before inserting the cartridge into the detergent dosing system.
Ein konstruktiv besonders einfacher Aufbau der Vorrichtung zur Detektion eines vorbestimmten Füllstandes des Reinigungsmittels ergibt sich dann, wenn das Volumen der in der Mehrzahl an Kammern bevorrateten Reinigungsmittel derart bemessen ist, dass insgesamt z Spülzyklen durchführbar sind und jedes der Reinigungsmittel mit dem z-ten Spülzyklus aufgebraucht ist. Durch dieses Vorgehen ist sichergestellt, dass die Kartusche bei einem Austausch keinerlei Reinigungsmittel mehr enthält. Dieser Zustand wird insbesondere dadurch erreicht, dass gemäß einer Weiterbildung der Erfindung in jedem Spülgang ein prozentual gleicher Anteil der zumindest zwei Reinigungsmittel durch das Dosiersystem dosiert wird. Dabei kann vorgesehen sein, dass die Gesamtzahl z der Spülzyklen beim Aufbrauch mehrerer Kartuschen variabel sein kann und von den jeweils durchgeführten Spülzyklen abhängig ist. In dieser Variante ist sichergestellt, dass unabhängig von der Anzahl der, Reinigungsmittel bevorratenden, Kammern eine einzige Vorrichtung zur Detektion des Füllstandes (einer der Kammern) ausreichend ist, um zuverlässig einer Aussage über eine leere Kartusche oder über eine noch mögliche Anzahl an Dosiervorgängen zu geben.A structurally particularly simple construction of the device for detecting a predetermined fill level of the cleaning agent is obtained if the volume of the cleaning agents stored in the plurality of chambers is dimensioned such that a total of z rinsing cycles can be carried out and each of the cleaning agents is used up with the zth rinsing cycle is. This procedure ensures that the cartridge no longer contains any cleaning agents when it is replaced. This state is achieved in particular in that, according to a development of the invention, an equal percentage of the at least two cleaning agents is dosed by the dosing system in each wash cycle. It can be provided that the total number z of rinsing cycles when several cartridges are used up can be variable and is dependent on the rinsing cycles carried out in each case. This variant ensures that, regardless of the number of chambers that store cleaning agents, a single device for detecting the fill level (one of the chambers) is sufficient to reliably provide information about an empty cartridge or about a still possible number of dosing processes ,
Ferner gehört zur Erfindung ein Reinigungsmitteldosiersystem der oben beschriebenen Art.The invention also includes a detergent dosing system of the type described above.
Die Erfindung wird nachfolgend anhand der Figuren näher erläutert. Es zeigen:
- Fig. 1
- eine Geschirrspülmaschine mit einem Reinigungsmitteldosiersystem zur Aufnahme einer Kartusche, welches in einer Behälterwand angeordnet ist,
- Fig. 2
- eine weitere Geschirrspülmaschine mit einem Reinigungsmitteldosiersystem zur Aufnahme einer Kartusche, welches in der Tür der Geschirrspülmaschine angeordnet ist,
- Fig. 3
- einen Schnitt durch eine Kartusche, in welcher Reinigungsmittel bevorratet ist,
- Fig. 4
- ein erstes Ausführungsbeispiel einer Vorrichtung zur Detektion eines vorbestimmten Füllstands von Reinigungsmittel in der Kartsuche,
- Fig. 5
- ein zweites Ausführungsbeispiel einer Vorrichtung zur Detektion eines vorbestimmten Füllstands von Reinigungsmittel in der Kartsuche, und
- Fig. 6
- ein drittes Ausführungsbeispiel einer Vorrichtung zur Detektion eines vorbestimmten Füllstands von Reinigungsmittel in der Kartsuche.
- Fig. 1
- a dishwasher with a detergent dosing system for holding a cartridge, which is arranged in a container wall,
- Fig. 2
- another dishwasher with a detergent dosing system for holding a cartridge, which is arranged in the door of the dishwasher,
- Fig. 3
- a section through a cartridge in which cleaning agent is stored,
- Fig. 4
- 1 shows a first exemplary embodiment of a device for detecting a predetermined fill level of cleaning agent in the card search,
- Fig. 5
- a second embodiment of a device for detecting a predetermined level of cleaning agent in the map search, and
- Fig. 6
- a third embodiment of a device for detecting a predetermined level of cleaning agent in the map search.
Der Reinigungsmittelspender 11 umfasst ein Gehäuse 12 und einen gegenüber dem Gehäuse 12 verschwenkbar gelagerten Deckel. Befindet sich der Deckel in seiner Öffnungsposition (vgl. Darstellung in
Eine beispielhafte Ausgestaltung der Kartusche 50 ist in
Die Gesamtzahl der Dosiervorgänge beim Aufbrauch der Kartusche hängt von der Art der jeweils durchgeführten Spülzyklen ab. Um den unterschiedlichen Anforderungen gerecht zu werden, wird für jedes in der Geschirrspülmaschine auswählbare Programm eine bestimmte Dosiermenge vorgegeben oder aber sensorisch ermittelt. Bei schwach verschmutztem Spülgut wird eine geringere Dosiermenge gewählt, während bei stark verschmutztem Spülgut eine höhere Dosiermenge an Reinigungsmitteln vorgesehen ist. Um sicherzustellen, dass jedes der Reinigungsmittel mit dem gleichen Spülzyklus aufgebraucht ist, ist der prozentuale Anteil jeder Reinigungsmittelkomponente, der während eines Dosiervorgangs der Spülflotte zugegeben wird, gleich. Dies ermöglicht einen sparsamen Umgang mit den zur Verfügung stehenden Ressourcen, da ein Austausch der Kartusche lediglich dann erfolgt, wenn diese vollständig entleert ist.The total number of dosing processes when the cartridge is used up depends on the type of rinsing cycle carried out. In order to meet the different requirements, a certain dosing quantity is specified for each program that can be selected in the dishwasher, or it is determined by sensors. In the case of lightly soiled wash items, a lower dosage is selected, while in the case of heavily soiled wash items, a higher amount of detergent is provided. To ensure that each of the detergents with the same rinse cycle is used up, the percentage of each detergent component that is added to the rinse liquor during a dosing process is the same. This enables economical use of the available resources, since the cartridge can only be replaced when it is completely empty.
Um sicherzustellen, dass unabhängig von dem Füllstand der jeweiligen Reinigungsmittel in der Kartusche das gleiche Volumen zur Spülflotte zudosiert wird, wird die Auslaufzeit, in der die Reinigungsmittel durch Öffnen des öffenbaren Verschlusses zur weiteren Verarbeitung aus der Kartusche ausleitbar sind, abhängig von der Nummer des gerade durchgeführten Dosiervorgangs seit dem Einlegen einer neuen, vollen Kartusche variiert. Die Auslaufzeit der Reinigungsmittel bestimmt sich nach der Formel
- t
- die Auslaufzeit des bzw. der Reinigungsmittel,
- n
- die Nummer des Dosiervorgangs,
- x
- die Auslaufzeit des bzw. der Reinigungsmittel des ersten Dosiervorgangs, und
- y
- eine Konstante
- t
- the expiry time of the cleaning agent (s),
- n
- the number of the dosing process,
- x
- the run-off time of the cleaning agent (s) of the first dosing process, and
- y
- a constant
Mit zunehmender Nummer des Spülganges wird somit die Auslaufzeit des bzw. der Reinigungsmittel verlängert, so dass dem mit abnehmendem Reinigungsmittelvolumen in der Kartusche verringerten Druck Rechnung getragen wird.As the number of rinsing cycles increases, the run-out time of the cleaning agent or cleaning agents is thus extended, so that the reduced pressure in the cartridge with decreasing cleaning agent volume is taken into account.
Das Fördern des Reinigungsmittels kann dabei ausschließlich unter Ausnutzung der Schwerkraft erfolgen. Die Fördereinrichtung, insbesondere die Ausgestaltung der Dichtung kann jedoch auch nach dem Prinzip einer Pumpe aufgebaut sein, so dass Reinigungsmittel aus der Reinigungskammer in die Dosierkammer und aus der Dosierkammer in den Spülraum gefördert werden.The cleaning agent can only be conveyed using gravity. However, the conveying device, in particular the configuration of the seal, can also be constructed according to the principle of a pump, so that cleaning agents are conveyed from the cleaning chamber into the metering chamber and from the metering chamber into the washing area.
Jede der Kammern 51a bis 51e ist mit einem öffenbaren Verschluss 25a bis 25e, z.B. in Form einer Membran versehen. Die z.B. aus einem Gummi bestehenden Membranen schließen die einzelnen Kammern 51a bis 51e dichtend ab, so dass während der Lagerung und des Transports der Kartusche 50 kein Reinigungsmittel aus diesen entweichen kann. Beim Einsetzen der Kartusche 50 in den Reinigungsmittelspender 11 werden die Membranen von korrespondierend in dem Reinigungsmittelspender 11 angeordneten Kanülen 21 durchstochen, so dass nach Maßgabe einer entsprechenden Dosiervorrichtung Reinigungsmittel in den Spülraum zugegeben werden kann.Each of the
Die Kartusche ist bevorzugt aus einem Kunststoff gefertigt und weist eine Breite B von ca. 200 mm, eine Höhe H von ca. 125 mm und eine Tiefe von ca. 25 mm auf. Bei diesen Abmaßen lässt sich das Volumen der verschiedenen Kammern derart bemessen, dass die gewünschten 20 bis 40 Spülzyklen mittels einer Kartusche durchführbar sind.The cartridge is preferably made of a plastic and has a width B of approximately 200 mm, a height H of approximately 125 mm and a depth of approximately 25 mm. With these dimensions, the volume of the various chambers can be dimensioned such that the desired 20 to 40 rinsing cycles can be carried out by means of a cartridge.
Neben den Kammern 51a bis 51e verfügt die Kartusche 50 über eine weitere Kammer 52, welche mit einem oder mehreren Belüftungskanälen 53 in Verbindung steht. Der oder die Belüftungskanäle 53 ihrerseits weisen eine Verbindung zu den verschiedenen Kammern 51a bis 51e auf. Auf diese Weise ist sichergestellt, dass mit zunehmender Entleerung der Kammern 51a bis 51e sich kein Unterdruck in diesen aufbauen kann, wodurch das Zugeben von Reinigungsmitteln erschwert oder verfälscht würde. Die Belüftungskanäle 53 befinden sich bevorzugt in einem Deckel 54, welcher nach dem Befüllen der einzelnen Kammern 51a bis 51e mit den jeweiligen Reinigungsmitteln auf das Gehäuse der Kartusche aufgebracht ist. Der Deckel 54 kann ein Überdruckventil 55 aufweisen, welches gegebenenfalls bei bestimmten Reinigungsmittelkomponenten notwendig ist.In addition to the
Das Reinigungsmitteldosiersystem verfügt zur Detektion einer leeren oder nahezu leeren Kartusche über Mittel zur Abfrage des Füllstandes der Reinigungsmittel in der Kartusche. Erreicht das Reinigungsmittel in einer oder mehreren der Kammern der Kartusche einen vorgegebenen Füllstand, z.B. wenn eine vorgegebene Anzahl an Spülzyklen noch möglich ist, so kann dies dem Nutzer über ein optisches Signal dargestellt werden. Die Anzeigevorrichtung kann sich in bekannter Weise z.B. an der Außenseite der Tür, z.B. der Blende, befinden.To detect an empty or almost empty cartridge, the detergent dosing system has means to query the fill level of the detergent in the cartridge. If the cleaning agent reaches a predetermined fill level in one or more of the chambers of the cartridge, e.g. if a predetermined number of rinsing cycles is still possible, this can be displayed to the user via an optical signal. The display device may e.g. on the outside of the door, e.g. the aperture.
In den
In dem Ausführungsbeispiel gemäß
Die Detektion eines vorbestimmten Füllstands an Reinigungsmittel erfolgt unter Verwendung einer Sende-/Empfangseinheit 60, die am Boden des Gehäuses 12 des Reinigungsmittelspenders 11 angeordnet ist. Ein Lichtleitelement 61, wie z.B. eine Linse, schließt bündig mit dem Boden des Gehäuses 12 ab. Korrespondierend zu dem Lichtleitelement 61 ist ein, z.B. aus Kunststoff oder Glas bestehender Lichtleiter 62, im Gehäuseboden der Kartusche 50 befestigt. Ist die Kartusche 50, wie in
Bei entsprechender Ausgestaltung des Lichtleiters 62, z.B. einen Bogen in der Form eines umgekehrten U oder Wendel, kann die von dem Lichtsender abgegebene Lichtstrahlung an einer ersten Koppelfläche eingekoppelt und an einer zweiten Koppelfläche des Lichtleiters ausgekoppelt werden. Die zweite Koppelfläche ist in dieser Variante ebenfalls im Boden der Kartusche 50 ausgebildet.With a corresponding design of the
Durch die Länge bzw. Höhe, mit der der Lichtleiter 62 in Schwerkraftrichtung nach oben in die Kartusche 50 ragt, kann festgelegt werden, bei welchem Füllstand bzw. Volumen des Reinigungsmittels ein Signal abgegeben werden soll.The length or height with which the
In dem Ausführungsbeispiel gemäß
Im Ausführungsbeispiel gemäß
Eine weitere, in den Figuren nicht dargestellte, Vorrichtung zur Überwachung des Füllstandes an Reinigungsmittel in der Kartusche bedient sich einer indirekten Ermittlung, indem die Geschirrspülmaschine ein Detektionsmittel zum Erkennen einer vollen Kartusche, z.B. eine Sende-/Empfangsvorrichtung eines Transpondersystems oder einen Bar-Code, sowie ein Detektionsmittel zum Erfassen der seit dem Einlegen der vollen Kartusche durchgeführten Dosiervorgänge umfasst. Letzteres erfasst dabei bevorzugt die Anzahl der Dosiervorgänge und das jeweils aus dem Reinigungsmitteldosiersystem ausgeleitete Volumen an Reinigungsmittel. Aus diesen Informationen lässt sich auf einfache Weise der absolute Füllstand des Reinigungsmittels in dem Reinigungsmitteldosiersystems ermitteln.Another device, not shown in the figures, for monitoring the level of detergent in the cartridge uses an indirect determination, in that the dishwasher has a detection means for detecting a full cartridge, for example a transceiver system transceiver system or a bar code, and a detection means for detecting the dispensing operations carried out since the full cartridge was inserted. The latter preferably records the number of dosing processes and that from the detergent dosing system rejected volume of detergent. The absolute fill level of the detergent in the detergent dosing system can be determined in a simple manner from this information.
Da die in der Kartusche 50 enthaltenen Reinigungsmittel erst nach und nach im Rahmen einer Mehrzahl von Spülzyklen dem Spülraum, genauer der in dem Spülraum umgewälzten Spülflotte, zudosiert werden, sind diese mit jedem Spülzyklus beträchtlichen absoluten Temperaturen und Temperaturschwankungen ausgesetzt. Um zu verhindern, dass die Eigenschaften der Reinigungsmittel sich aufgrund dessen mit der Zeit verändern, ist zumindest eine zum Spülraum hin gerichtete Gehäusewand der Kartusche 50 und/oder der zum Spülraum hin gerichtete Deckel des Reinigungsmitteldosiersystems 10 aus einem isolierenden Material gefertigt oder aber mit einer Isolation umgeben. Hierdurch wird ein Wärmestrom vom Spülraum in Richtung des Reinigungsmitteldosiersystems bzw. der in der Kartusche bevorrateten Reinigungsmittel begrenzt, so dass die Langzeitstabilität der verwendeten Reinigungsmittel gewährleistet ist. Die Isolation kann durch ein in dem Deckel oder dem betreffenden Gehäuseabschnitt der Kartusche angeordnetes Gasvolumen gebildet sein. Dieses die Isolation erzeugende Gasvolumen kann im Rahmen der Fertigung des Deckels bzw. der Kartusche eingebracht werden. Das hierbei verwendete Verfahren ist als Gasinnendruckverfahren (GID) bekannt.Since the cleaning agents contained in the
Neben der Aufnahme für die Kartusche kann der Reinigungsmittelspender 11 eine weitere Kammer zur Aufnahme eines festen Reinigungsmittels aufweisen. Bei dem festen Reinigungsmittel kann es sich beispielsweise um einen 3-in-1-Tab handeln, welcher in die weitere Kammer eingelegt wird, wenn im Aufnahmeraum keine oder eine leere Kartusche 50 enthalten ist. Das Vorsehen der weiteren Kammer zur Aufnahme eines festen Reinigungsmittels ermöglicht es, die Geschirrspülmaschine auch dann zu nutzen, wenn die Kartusche 50 leer ist und keine gefüllte Kartusche verfügbar ist.In addition to the receptacle for the cartridge, the
Die weitere Kammer kann eine Öffnung aufweisen, welche mit der Umgebung der Geschirrspülmaschine in Verbindung steht. Die Öffnung kann zu diesem Zweck über Kanäle, welche auf der Rückseite der Behälterwand verlaufen, mit der Umgebung verbunden sein. Das Reinigungsmitteldosiersystem integriert damit die Funktionalität einer so genannten "Expansionsöffnung", welche zur Ableitung des im Spülraum entstehenden Überdrucks dient, wenn die Geschirrspülmaschine z. B. während eines Spülzyklus mit bereits erwärmter Spülflotte durch den Benutzer geöffnet und wieder geschlossen wird. Der in diesem Moment entstehende Überdruck kann dann über die weitere Kammer und die Öffnung zur Umgebung hin abgeleitet werden.The further chamber can have an opening which is connected to the surroundings of the dishwasher. For this purpose, the opening can be connected to the environment via channels which run on the back of the container wall. The detergent dosing system thus integrates the functionality of a so-called "expansion opening", which is used to discharge the excess pressure that arises in the wash cabinet when the dishwasher is e.g. B. during a Rinsing cycle with already warmed up washing liquor is opened and closed again by the user. The excess pressure which arises at this moment can then be dissipated to the surroundings via the further chamber and the opening.
- 11
- Geschirrspülmaschinedishwasher
- 22
- Gehäusecasing
- 33
- Türdoor
- 44
- SpülraumWash cabinet
- 55
- Geschirrkorbdish rack
- 66
- Geschirrkorbdish rack
- 77
- Behälterwandcontainer wall
- 88th
- Stirnseite der TürFront of the door
- 1010
- Reinigungsmitteldosiersystemdetergent dosing
- 1111
- ReinigungsmittelspenderDetergent dispenser
- 1212
- Gehäusecasing
- 1313
- Gehäusewand (= Deckel)Housing wall (= cover)
- 1414
- Deckelcover
- 1515
- Aufnahmeraumaccommodation space
- 21a21a
- Kanülecannula
- 25a-25e25a-25e
- Membranmembrane
- 3030
- Anschlag/AuflageflächeStop / stand
- 3131
- Öffnung (zur Umgebung hin)Opening (to the surroundings)
- 3232
- Dichtungpoetry
- 3333
- Isolationisolation
- 5050
- Kartuschecartridge
- 51a-51e51a-51e
- Kammer für Reinigungsmitte!Chamber for cleaning agents!
- 5252
- Kammer für EntlüftungVentilation chamber
- 5353
- Belüftungskanalventilation duct
- 5454
- Deckelcover
- 5555
- ÜberdruckventilPressure relief valve
- HH
- Höheheight
- BB
- Breitewidth
- 6060
- Sende-/EmpfangseinheitTransmit / receive unit
- 6161
- Lichtleitelementlight guide
- 6262
- Lichtleiteroptical fiber
- 6363
- Koppelflächecoupling surface
- 6464
- Koppelflächecoupling surface
- 7070
- Elektrodeelectrode
- 7171
- Elektrodeelectrode
- 7272
- Gehäusewandhousing wall
- 8080
- Anregungsmittelstimulant
Claims (4)
- Detergent dosing system (10) for a water-conducting household appliance having a detergent dispenser (11) and at least one cartridge (59), wherein the detergent dispenser (11) has a receiving compartment (15) for receiving the at least one cartridge (50), wherein the cartridge (50) has a plurality of chambers (51a, ..., 51e) which are separated from one another for receiving detergent and is embodied to hold at least one detergent, the quantity of detergent that can be held is greater than the quantity required for a wash cycle and the detergent dosing system (10) has an apparatus for optically detecting a fill level in the at least one cartridge (50), wherein the apparatus for optically detecting the fill level has a light emitter, a light receiver and an optical waveguide (62), wherein the apparatus for optically detecting the fill level is embodied not to monitor the fill level in all the chambers, but instead just in one chamber (51a, ..., 51e) or in some of the chambers (51a,..., 51e), characterised in that the apparatus for optically detecting the fill level is embodied to infer the global fill level of detergent in the detergent dosing system (10) from this determined information, wherein the optical waveguide (62) has a first coupling surface (63) and a second coupling surface (64) and the light beams from the light emitter (61) can be coupled into the optical waveguide (62) through the first coupling surface (63) and the light beams leaving the optical waveguide (62) can be decoupled through the first coupling surface (63) or the second coupling surface (64) and can be received by the light receiver.
- Detergent dosing system (10) according to claim 1, characterised in that the light emitter and the light receiver are arranged in the detergent dispenser (11) and the optical waveguide (62) is arranged in the cartridge (50).
- Detergent dosing system (10) according to one of claims 1 or 2, characterised in that the fill level can be set by a variable extension of the optical waveguide (62) in the cartridge (50) in the direction of gravity.
- Water-conducting household appliance, in particular household dishwasher, having a detergent dispensing system (10) according to one of claims 1 to 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PL07802982T PL2074251T3 (en) | 2006-09-19 | 2007-08-29 | Water-conducting domestic appliance comprising a detergent dosing system with fill level detection |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102006043973A DE102006043973A1 (en) | 2006-09-19 | 2006-09-19 | Water-conducting household appliance with detergent dosing system |
PCT/EP2007/058965 WO2008034691A1 (en) | 2006-09-19 | 2007-08-29 | Water-conducting domestic appliance comprising a detergent dosing system with fill level detection |
Publications (2)
Publication Number | Publication Date |
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EP2074251A1 EP2074251A1 (en) | 2009-07-01 |
EP2074251B1 true EP2074251B1 (en) | 2020-01-08 |
Family
ID=38749309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP07802982.4A Active EP2074251B1 (en) | 2006-09-19 | 2007-08-29 | Water-conducting domestic appliance comprising a detergent dosing system with fill level detection |
Country Status (5)
Country | Link |
---|---|
US (2) | US8613805B2 (en) |
EP (1) | EP2074251B1 (en) |
DE (1) | DE102006043973A1 (en) |
PL (1) | PL2074251T3 (en) |
WO (1) | WO2008034691A1 (en) |
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2006
- 2006-09-19 DE DE102006043973A patent/DE102006043973A1/en not_active Withdrawn
-
2007
- 2007-08-29 US US12/311,099 patent/US8613805B2/en active Active
- 2007-08-29 PL PL07802982T patent/PL2074251T3/en unknown
- 2007-08-29 EP EP07802982.4A patent/EP2074251B1/en active Active
- 2007-08-29 WO PCT/EP2007/058965 patent/WO2008034691A1/en active Application Filing
-
2013
- 2013-09-19 US US14/031,071 patent/US9510727B2/en active Active
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Title |
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None * |
Also Published As
Publication number | Publication date |
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US20090235962A1 (en) | 2009-09-24 |
US20140014684A1 (en) | 2014-01-16 |
EP2074251A1 (en) | 2009-07-01 |
US9510727B2 (en) | 2016-12-06 |
PL2074251T3 (en) | 2020-07-27 |
DE102006043973A1 (en) | 2008-03-27 |
US8613805B2 (en) | 2013-12-24 |
WO2008034691A1 (en) | 2008-03-27 |
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