EP1048912A1 - Refrigerating apparatus and method for indicating germs - Google Patents
Refrigerating apparatus and method for indicating germs Download PDFInfo
- Publication number
- EP1048912A1 EP1048912A1 EP00108812A EP00108812A EP1048912A1 EP 1048912 A1 EP1048912 A1 EP 1048912A1 EP 00108812 A EP00108812 A EP 00108812A EP 00108812 A EP00108812 A EP 00108812A EP 1048912 A1 EP1048912 A1 EP 1048912A1
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- European Patent Office
- Prior art keywords
- sensor
- cooling device
- interior
- germs
- condensate
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- 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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Classifications
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- 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
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/14—Collecting or removing condensed and defrost water; Drip trays
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- 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
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- 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
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/36—Visual displays
Definitions
- the invention relates to a refrigerator with a refrigeration device, an interior and a collecting device for condensate arising in the interior.
- the Invention a method for indicating germs in such a cooling device.
- Refrigerators are useful for short-term storage of various foods and foods suitable for different low temperatures.
- Design and arrangement of an evaporator e.g. plate-shaped, with or without evaporator compartment, integrated in the rear wall
- evaporator e.g. plate-shaped, with or without evaporator compartment, integrated in the rear wall
- Subdivision of the interior allow the groceries to the appropriate Store levels in the optimal temperature range for them.
- EP 312 060 B1 also describes an automatic cooling device with a device for Air circulation.
- a separate storage compartment is included in this cooling unit is limited by plastic material.
- the germs are killed by ultraviolet rays without the tray itself being exposed to the ultraviolet rays. at such a device is indeed a closed compartment in which germ killing done, but such a device for killing germs is not directly on the whole Storage space transferable.
- Ultraviolet rays are in shadow areas as well as in Biofilms and soiling on the food or storage containers not effective.
- biofilms are usually not visible. The user must therefore get away from it assume that undesirable in the refrigerator interior outside the locked compartment Bacteria or germs can be present. A time for a necessary cleaning cannot be derived from it. Again, the user is visible at Dirt thoroughly clean the inside walls. Then there is one Distribution / propagation of the germs is often well advanced.
- the invention thus presents the problem of creating a cooling device in which even an apparently clean interior is an indication of recommended interior cleaning occurs because the number of germs actually present is increased.
- the advantages achievable with the invention are, in particular, that the user already pointed out a sensible cleaning or a disinfectant renovation of the interior if a significant number of germs and / or spores or similar are present, but no visible contamination can be determined.
- This is in the Cooling device at least one measuring device for the early indication of germs and / or Spores arranged.
- This measuring device is advantageously composed of at least one sensor for the detection of bacteria, yeast, mold and / or their metabolic products, an evaluation electronics and / or a display element together. The right one The time for cleaning is determined in particular by comparison with the evaluation electronics stored limit values determined and signaled. Exceeds the current measured value Bacteria, yeasts, molds and / or their metabolites, e.g.
- Nitrite concentration is in a further advantageous embodiment a warning is given at regular intervals via a display element. This warning is given either optically and / or acoustically.
- the sensor is designed to measure the prevailing contamination in one place arranged, which is flushed with condensate from the interior of the cooling device.
- An arrangement of the sensor in or on a condensate trap is particularly advantageous or on the rear wall evaporator, because there is guaranteed wetting of the Sensor with condensate.
- the Condensate trap and the rear wall evaporator arranged a drip tray, which is in contact with the sensor.
- the senor is advantageously equipped as a nitrite sensor. This either directly records the nitrite present in the condensate or it is the oxidation as Measuring method applied and nitrite oxidized to nitrate.
- FIG. 1 shows a cooling device (1) in the form of a refrigerator, for a better overview the door (10) has been omitted.
- the refrigerator (1) has a heat-insulated housing an interior (2) with smooth side walls.
- the division of the interior (2) can be designed differently. Usually there is at least one, here Not shown, vegetable bowl and in several levels storage space for refrigerated goods. Naturally the interior (2) can also be divided in such a way that multi-part shells next to one another be inserted and / or in the upper area an additional freezer compartment is arranged.
- the refrigerator (1) can be equipped as a multi-temperature refrigerator.
- the cooling device (1) in at least two interiors (2) separated from one another to each divide separately assigned doors.
- a particularly good indoor climate leaves reach themselves with dynamic cooling. Here one ensures in the upper interior area arranged fan (9) for a good air flow and thus for even Temperatures throughout the interior (2).
- the refrigerated goods stored become a lot cooled faster.
- this measuring device includes, for example is designed as an electrochemical or biochemical sensor, at least one evaluation electronics (4) and advantageously also a display element (5). It becomes the total bacterial count determined directly or indirectly and with a basic limit value stored in the evaluation electronics (4) compared.
- the total germ count is the germ and spore load in the refrigerator (1), with high values for bacteria, mold and Yeasts are crucial. It is well known that a variety of mushrooms and Bacteria excretes nitrite. This knowledge allows from a determined nitrite concentration a conclusion on the degree of contamination of the interior (2) of the refrigerator (1) derive. Mushrooms, mold or the like are not always also visually recognizable, but through Nevertheless, biochemical sensors can be recorded directly or indirectly. If the measurement e.g. has high nitrite concentrations, e.g. > 1mg / l, can be simultaneously from one high germ load on the interior (2) can be assumed.
- the sensor (3) serves indirect germ detection preferably a detection of the metabolic products of Bacteria, yeasts and / or molds, e.g. Nitrite concentrations. This turns into nitrite either measured directly or oxidation is used as the measuring method and nitrite Oxidized to nitrate in order to deduce the degree of contamination of the interior (2).
- the sensor (3) is on to indicate that cleaning is necessary in good time at least one point of the interior (2) flushed with condensate. For example, arranging the sensor (3) on an evaporator (7) which secures Rear, side wall, ceiling or floor surface can be arranged, good measurement results. Likewise, an arrangement of the sensor (3) in or on a condensate collector is also (8) or in the evaporator dish a sensible place to arrange the sensor. A small change in the interior, being between the condensate collector (8) and a drip rail (6) is arranged on the rear wall evaporator (7), creates a place for one Particularly reliable measurement value acquisition of the sensor (3). It is advisable to use the sensor (3) to be arranged at the lower end of this drip tray (6).
- the senor (3) can be replaced.
- biochemical sensors should be interchangeable be, because after a certain period of use, depending on the design, exhaust itself.
- An example of a replaceable sensor is training in Shape of a chip.
- automatic or manually adjustable cleaning of a sensor is useful and, for example, through a brief reversal of potential or increase in potential reachable.
- the evaluation electronics (4) are preferably in the electronics already present in the cooling device (1) integrated or arranged in their vicinity. You (4) can also in another place be housed separately.
- the display element (5) is preferably on the control panel, such as it is known for refrigerators and / or freezers, arranged or in the front area of the Integrated door (10).
- a control element (11) can also be arranged on the control panel, via which the measuring device (3, 4, 5) is switched off and on manually can be. Switching off should be carried out immediately after cleaning the inside of the cooling unit (1) for a defined period of time to prevent interference with cleaning agent residues be avoided. The measuring device (3, 4, 5) is then either automatic or manually switched on again.
- the warning signal is after a predetermined Time that can also be stored in the electronics (4) is interrupted and periodically again activated. This warning continues until the interior is cleaned is carried out or the warning signal has been switched off manually.
- the time out for warning purposes a new, current measurement value acquisition can be interrupted as long until the interior has actually been cleaned. But also is it is possible that the time between warnings is shorter than the distances between the individual current data acquisition. Since the germ load predominantly after advanced time gets bigger, i.e. also ever higher concentrations of metabolic products, such as e.g. Nitrite can also be recorded, a maximum possible concentration as a reference limit be stored in the evaluation electronics (4). When this limit is reached the warning signal can no longer be suspended.
- a continuous display is said to be the advanced one Germination to clarify a health hazard when eating the exclude stored food as far as possible.
- the user should also be given the option of collecting the measured values and / or can turn off a warning if he does not have such information is interested or may even feel bothered by it.
- the presence of germs can be measured alongside a measurement of one of the metabolites bacteria, yeasts and / or mold (such as nitrite concentration) directly by biochemical sensing of bacteria, yeast and / or mold or the like determine.
- sensors (3) can therefore be used, e.g. electrochemical or biochemical sensors.
- FIG. 2 shows a refrigerator (1) whose door (10) hinged on the side is open is shown.
- the inside of the door (10) contains storage options, in particular for narrow or high refrigerated goods.
- a further sensor (3) for measuring the contamination can be arranged on the inside of the door.
- the interior (2) is designed in accordance with the cooling device described in FIG. 1. Basically, the moisture on the evaporator collects in the interior (2) and condenses there, icy and melting again. It is therefore an ideal location for the placement of a sensor (3) in the gutter (8) or in the evaporator dish.
Abstract
Description
Die Erfindung betrifft ein Kühlgerät mit einer Kälteerzeugungseinrichtung, einem Innenraum und einer Sammeleinrichtung für im Innenraum entstehendes Kondensat. Außerdem betrifft die Erfindung ein Verfahren zur Verkeimungsindikation in einem derartigen Kühlgerät.The invention relates to a refrigerator with a refrigeration device, an interior and a collecting device for condensate arising in the interior. In addition, the Invention a method for indicating germs in such a cooling device.
Kühlgeräte sind für eine kurzzeitige Lagerung von verschiedenen Speisen und Lebensmittel bei unterschiedlich niedrigen Temperaturen geeignet. Bauart und Anordnung eines Verdampfers (z.B. plattenförmig, mit oder ohne Verdampferfach, in Rückwand integriert) sowie eine zweckmäßige Unterteilung des Innenraumes ermöglichen es, die Lebensmittel auf den entsprechenden Ebenen in den für sie optimalen Temperaturbereichen zu lagern.Refrigerators are useful for short-term storage of various foods and foods suitable for different low temperatures. Design and arrangement of an evaporator (e.g. plate-shaped, with or without evaporator compartment, integrated in the rear wall) as well as a practical one Subdivision of the interior allow the groceries to the appropriate Store levels in the optimal temperature range for them.
Im Gegensatz zum statischen Kühlen, bei dem kühlzonenabhängig gekühlt wird und der Verdampfer an der Rückwand oder im oberen Bereich des Gerätes angeordnet ist, erobert in den letzten Jahren dynamisches Kühlen den Markt der Kühlgeräte. Hierbei wird die kalte Luft durch einen Ventilator im Kühlraum verteilt. Die Lebensmittel können im Kühlgerät unabhängig vom Standort bei gleichmäßiger Temperatur eingelagert werden. Besonders vorteilhaft ist hierbei neben der gleichmäßigen Kälte- und Luftfeuchtigkeitsverteilung das schnelle Abkühlen der eingebrachten Lebensmittel, allerdings werden so vorhandene oder entstehende Keime, Pilze und Sporen schneller verbreitet.In contrast to static cooling, where cooling is dependent on the cooling zone and the Evaporator is located on the rear wall or in the upper area of the device, conquered in dynamic cooling market in recent years. This is the cold air distributed in the refrigerator by a fan. The food can be independently in the refrigerator be stored from the location at a constant temperature. It is particularly advantageous in addition to the uniform distribution of cold and air humidity, rapid cooling of the food brought in, however, this way existing or emerging germs, Mushrooms and spores spread faster.
Feuchtigkeit, die von den eingelagerten Lebensmitteln abgegeben wird oder durch warme Luft beim Öffnen der Tür in das Kühlgerät gelangt, kondensiert am Verdampfer. Um die dort entstehende Reifschicht möglichst gering zu halten und außerdem die Lebensmittel vor einem Austrocknen sowie vor Geschmacksübertragungen untereinander zu bewahren, sollten nicht nur geruchsintensive Lebensmittel in verschlossenen Gefäßen aufbewahrt werden. Obwohl das allgemein bekannt ist, werden trotzdem viele Lebensmittel auch unverpackt im Kühlgerät abgestellt. An den Lebensmitteln oder Behältnissen anhaftende Keime, Pilze bzw. Sporen werden sowohl durch natürliche als auch durch dynamische Luftzirkulation im Innenraum und auf den Lebensmitteln bzw. auf den diese aufnehmenden Behältnissen verteilt. Da bei einer dickeren Reifschicht sowohl der Wärmeübergang an das Kältemittel im Verdampfer schlechter und auch die Temperaturregelung ungenauer werden, sollte ein regelmäßig abgetaut werden. Unabhängig, ob von Hand oder teilautomatisch abgetaut wird, das unvermeidbar mit Keimen und Sporen belastete Tauwasser wird in einem unterhalb des Verdampfers angeordneten Auffangbehälter gesammelt. Bei einem automatischen Abtauvorgang ist ein großflächiger Rückwandverdampfer vorhanden. Das Tauwasser läuft über eine unterhalb des Verdampfers angeordnete Auffangrinne durch ein kleines Rohr an der Rückwand des Kühlgerätes in einen Kondensatauffangbehälter, der auf dem Verdichter oder am Verflüssiger angeordnet ist. Das Tauwasser verdunstet durch die dort vorhandene Wärme.Moisture emitted by the stored food or by warm air enters the refrigerator when the door is opened, condenses on the evaporator. To those there keep the resulting frost layer as low as possible and also the food in front of you It shouldn't dry out and prevent the transfer of taste from one another only odor-intensive foods should be kept in closed containers. Although that it is generally known that many foods are still stored in the refrigerator, even when they are not packed. Germs, fungi or spores adhering to the food or containers both through natural and dynamic air circulation in the interior and on the Food or distributed on the receptacles receiving them. Because with a thicker one Frost layer both the heat transfer to the refrigerant in the evaporator and worse the temperature control should become more inaccurate, should be defrosted regularly. Independently, whether defrosted by hand or semi-automatically, this is inevitable with germs and Condensate containing spores is stored in a collecting container located below the evaporator collected. With an automatic defrosting process, there is a large-area rear wall evaporator available. The defrost water runs through a below the evaporator Arranged gutter through a small tube on the rear wall of the cooling unit in one Condensate trap, which is arranged on the compressor or on the condenser. The Condensation evaporates due to the heat there.
Die DE 23 44 261 A1 beschreibt ein Kühlgerät mit Umluftsystem im Innenraum, wobei die Luft über eine Filtervorrichtung zwangsgeführt wird. Dadurch sollen die im Innenbereich auftretenden Gerüche wirksam beseitigt werden. Mit einem derartigen Aufbau lässt sich zwar der Geruch innerhalb des Kühlgerätes verbessern, jedoch werden durch die Luftbewegung die unvermeidlich vorhandenen Keime, Pilzsporen o.ä. unvermindert über den gesamten Innenraum verteilt. In der Filtervorrichtung erfolgt keine Abtötung dieser Keime und/oder Sporen. Das Kühlgerät wird zumeist aber erfahrungsgemäß erst gereinigt, wenn sichtbare Verschmutzungen auftreten. Bevor Keimen und/oder Sporen für das menschliche Auge sichtbar werden, ist der Innenraum aber bereits mit diesen belastet.DE 23 44 261 A1 describes a cooling device with a recirculation system in the interior, the air is forced through a filter device. As a result, those occurring in the interior should Odors can be effectively eliminated. With such a structure, the Improve the smell inside the refrigerator, but the movement of air will inevitably present germs, fungal spores or similar undiminished over the whole Interior distributed. These germs and / or are not killed in the filter device Spores. Experience has shown that the cooling device is usually only cleaned when it is visible Soiling occurs. Before germs and / or spores for the human eye visible, the interior is already loaded with these.
EP 312 060 B1 beschreibt ebenfalls ein automatisches Kühlgerät mit einer Einrichtung zur Luftumwälzung. Allerdings ist in diesem Kühlgerät ein gesondertes Lagerfach enthalten, das von Kunststoffmaterial eingegrenzt ist. Die Einrichtung zur Luftumwälzung erzeugt in diesem Fach eine Zwangsventilation über eine Keimtötungseinrichtung. Die Keimtötung erfolgt durch ultraviolette Strahlen, ohne dass das Fach selbst den ultravioletten Strahlen ausgesetzt ist. Bei einem derartigen Gerät ist zwar ein abgeschlossenes Fach vorhanden, in dem eine Keimtötung erfolgt, jedoch ist eine derartige Vorrichtung zur Keimabtötung nicht direkt auf den gesamten Aufbewahrungsraum übertragbar. Ultraviolette Strahlen sind in Schattenbereichen sowie in Biofilmen und Anschmutzungen auf den Lebensmitteln bzw. Aufbewahrungsgefäßen hinein nicht wirksam. Biofilme sind in der Regel aber nicht sichtbar. Der Benutzer muss daher davon ausgehen, dass im Kühlinnenraum außerhalb des abgeschlossenen Faches unerwünschte Bakterien bzw. Keime vorhanden sein können. Ein Zeitpunkt für eine notwendige Reinigung kann davon nicht abgeleitet werden. Auch hier wird der Benutzer bei sichtbaren Verschmutzungen eine gründliche Reinigung der Innenwände vornehmen. Dann ist eine Verteilung/Vermehrung der Keime häufig schon weit fortgeschritten.EP 312 060 B1 also describes an automatic cooling device with a device for Air circulation. However, a separate storage compartment is included in this cooling unit is limited by plastic material. The device for air circulation generated in this Fan forced ventilation via a germicide. The germs are killed by ultraviolet rays without the tray itself being exposed to the ultraviolet rays. at such a device is indeed a closed compartment in which germ killing done, but such a device for killing germs is not directly on the whole Storage space transferable. Ultraviolet rays are in shadow areas as well as in Biofilms and soiling on the food or storage containers not effective. However, biofilms are usually not visible. The user must therefore get away from it assume that undesirable in the refrigerator interior outside the locked compartment Bacteria or germs can be present. A time for a necessary cleaning cannot be derived from it. Again, the user is visible at Dirt thoroughly clean the inside walls. Then there is one Distribution / propagation of the germs is often well advanced.
Der Erfindung stellt sich somit das Problem ein Kühlgerät zu schaffen, bei welchem selbst bei einem optisch vermeintlich sauberen Innenraum ein Hinweis auf eine empfehlenswerte Innenraumreinigung erfolgt, weil die tatsächlich vorhandene Keimanzahl erhöht ist.The invention thus presents the problem of creating a cooling device in which even an apparently clean interior is an indication of recommended interior cleaning occurs because the number of germs actually present is increased.
Erfindungsgemäß wird dieses Problem durch ein Kühlgerät mit den im Patentanspruch 1 angegebenen
Merkmalen gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung
ergeben sich aus den nachfolgenden Unteransprüchen.According to the invention, this problem is solved by a cooling device with the specified in
Die mit der Erfindung erreichbaren Vorteile bestehen insbesondere darin, dass der Benutzer bereits auf eine sinnvolle Reinigung bzw. eine desinfizierende Sanierung des Innenraumes hingewiesen wird, wenn bereits eine erhebliche Anzahl von Keimen und/oder Sporen o.ä. vorhanden sind, aber noch keine sichtbare Verschmutzung feststellbar ist. Dazu ist in dem Kühlgerät mindestens eine Messeinrichtung zur frühzeitigen Indikation von Keimen und/oder Sporen angeordnet. Diese Messeinrichtung setzt sich vorteilhaft aus mindestens einem Sensor zur Erfassung von Bakterien, Hefen, Schimmelpilzen und/oder von deren Stoffwechselprodukten, einer Auswerteelektronik und/oder einem Anzeigeelement zusammen. Der geeignete Zeitpunkt zur Reinigung wird insbesondere durch Vergleich mit in der Auswerteelektronik abgelegten Grenzwerten ermittelt und signalisiert. Überschreitet der aktuelle Messwert vorhandener Bakterien, Hefen, Schimmelpilze und/oder deren Stoffwechselprodukte, z.B. Nitritkonzentration, den Vergleichs- bzw. Grenzwert, wird in einer weiteren vorteilhaften Ausgestaltung in wiederkehrenden Abständen eine Warnung über ein Anzeigeelement vorgenommen. Diese Warnung erfolgt entweder optisch und/oder akustisch. In einer vorteilhaften Ausgestaltung ist der Sensor zur Messung der vorherrschenden Verkeimung an einem Ort angeordnet, welcher von Kondensat aus dem Innenraum des Kühlgerätes durchspült ist. Besonders vorteilhaft ist dabei eine Anordnung des Sensors in oder an einer Kondensatauffangrinne oder an dem Rückwandverdampfer, weil dort garantiert eine Benetzung des Sensors mit Kondensat erfolgt. In einer anderen vorteilhaften Ausgestaltung ist zwischen der Kondensatauffangrinne und dem Rückwandverdampfer eine Abtropfleiste angeordnet, welche mit dem Sensor in Kontakt steht. Da bekannt ist, dass eine Vielzahl von Bakterien Nitrit als Stoffwechselprodukt erzeugen, ist der Sensor vorteilhaft als Nitritsensor ausgestattet. Dieser erfasst entweder direkt das im Kondensat vorhandene Nitrit oder es wird die Oxidation als Messverfahren angewendet und dabei Nitrit zu Nitrat oxidiert.The advantages achievable with the invention are, in particular, that the user already pointed out a sensible cleaning or a disinfectant renovation of the interior if a significant number of germs and / or spores or similar are present, but no visible contamination can be determined. This is in the Cooling device at least one measuring device for the early indication of germs and / or Spores arranged. This measuring device is advantageously composed of at least one sensor for the detection of bacteria, yeast, mold and / or their metabolic products, an evaluation electronics and / or a display element together. The right one The time for cleaning is determined in particular by comparison with the evaluation electronics stored limit values determined and signaled. Exceeds the current measured value Bacteria, yeasts, molds and / or their metabolites, e.g. Nitrite concentration, the comparison or limit value, is in a further advantageous embodiment a warning is given at regular intervals via a display element. This warning is given either optically and / or acoustically. In an advantageous The sensor is designed to measure the prevailing contamination in one place arranged, which is flushed with condensate from the interior of the cooling device. An arrangement of the sensor in or on a condensate trap is particularly advantageous or on the rear wall evaporator, because there is guaranteed wetting of the Sensor with condensate. In another advantageous embodiment, the Condensate trap and the rear wall evaporator arranged a drip tray, which is in contact with the sensor. Since it is known that a variety of bacteria known as nitrite Generate metabolic product, the sensor is advantageously equipped as a nitrite sensor. This either directly records the nitrite present in the condensate or it is the oxidation as Measuring method applied and nitrite oxidized to nitrate.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt
Figur 1- Kühlgerät ohne Tür
Figur 2- Kühlgerät mit geöffneter Tür
- Figure 1
- Refrigerator without a door
- Figure 2
- Refrigerator with the door open
Die Figur 1 zeigt ein Kühlgerät (1) in Form eines Kühlschrankes, bei dem zur besseren Übersicht die Tür (10) weggelassen wurde. Der Kühlschrank (1) weist in einem wärmeisolierten Gehäuse einen Innenraum (2) mit glatten Seitenwänden auf. Die Einteilung des Innenraumes (2) kann unterschiedlich ausgestaltet sein. Üblicherweise befinden sich dort mindestens eine, hier nicht dargestellte, Gemüseschale und in mehreren Ebenen Abstellflächen für Kühlgut. Natürlich kann der Innenraum (2) auch derart aufgeteilt sein, dass mehrteilige Schalen nebeneinander eingeschoben werden und/oder im oberen Bereich zusätzlich ein Gefrierfach angeordnet ist. Der Kühlschrank (1) kann als Mehrtemperaturen - Kühlschrank ausgestattet sein. Gleichfalls ist es möglich, das Kühlgerät (1) in mindestens zwei übereinander getrennte Innenräume (2) mit jeweils separat zugeordneten Türen aufzuteilen. Ein besonders gutes Innenraumklima lässt sich mit einer dynamischen Kühlung erreichen. Hier sorgt ein im oberen Innenraumbereich angeordneter Ventilator (9) für einen guten Luftdurchsatz und damit für gleichmäßige Temperaturen im gesamten Innenraum (2). Außerdem wird das eingelagerte Kühlgut viel schneller durchgekühlt.FIG. 1 shows a cooling device (1) in the form of a refrigerator, for a better overview the door (10) has been omitted. The refrigerator (1) has a heat-insulated housing an interior (2) with smooth side walls. The division of the interior (2) can be designed differently. Usually there is at least one, here Not shown, vegetable bowl and in several levels storage space for refrigerated goods. Naturally the interior (2) can also be divided in such a way that multi-part shells next to one another be inserted and / or in the upper area an additional freezer compartment is arranged. The refrigerator (1) can be equipped as a multi-temperature refrigerator. Likewise is it is possible to have the cooling device (1) in at least two interiors (2) separated from one another to each divide separately assigned doors. A particularly good indoor climate leaves reach themselves with dynamic cooling. Here one ensures in the upper interior area arranged fan (9) for a good air flow and thus for even Temperatures throughout the interior (2). In addition, the refrigerated goods stored become a lot cooled faster.
Unabhängig von der Innenraumgestaltung ist es bei ständigem Gebrauch eines Kühlschrankes (1) unvermeidbar, dass an Lebensmitteln bzw. deren Verpackungen anhaftende Bakterien, Hefen, Pilzen o.ä. sich im Innenraum (2) des Kühlschrankes (1) schnell ausbreiten. Daher ist in das Kühlgerät (1) eine Messeinrichtung (3, 4, 5) integriert, welche in der Lage ist, eine direkte oder indirekte Quantifizierung von im Innenraum (2) vorhandenen Keimen und Sporen vorzunehmen. Diese Messeinrichtung (3, 4, 5) beinhaltet neben einem Sensor (3), der beispielsweise als elektrochemischer oder biochemischer Sensor ausgebildet ist, mindestens eine Auswerteelektronik (4) und vorteilhafterweise auch ein Anzeigeelement (5). Es wird die Gesamtkeimzahl direkt oder indirekt ermittelt und mit einem in der Auswerteelektronik (4) abgelegten Basisgrenzwert verglichen. Als Gesamtkeimzahl wird die Keim- und Sporenbelastung im Kühlschrank (1) bezeichnet, wobei dafür insbesondere hohe Werte für Bakterien, Schimmel und Hefen ausschlaggebend sind. Es ist allgemein bekannt, dass eine Vielzahl von Pilzen und Bakterien Nitrit ausscheidet. Dieses Wissen erlaubt, aus einer ermittelten Nitritkonzentration einen Schluss auf den Verkeimungsgrad des Innenraumes (2) des Kühlschrankes (1) abzuleiten. Nicht immer sind Pilze, Schimmel o.ä. auch optisch erkennbar, aber durch biochemische Sensoren trotzdem schon direkt oder indirekt zu erfassen. Wenn die Messung beispielsweise hohe Nitritkonzentrationen aufweist, z.B. > 1mg/l, kann gleichzeitig von einer hohen Keimbelastung des Innenraums (2) ausgegangen werden. Der Sensor (3) dient bei indirekter Keimermittlung vorzugsweise einer Erfassung der Stoffwechselprodukte von Bakterien, Hefen und/oder Schimmelpilzen, wie z.B. Nitritkonzentrationen. Dabei wird Nitrit entweder direkt gemessen oder es wird die Oxidation als Messverfahren angewendet und Nitrit zu Nitrat oxidiert, um daraus auf den Verkeimungsgrad des Innenraumes (2) rückzuschließen.Regardless of the interior design, it is with constant use of a refrigerator (1) unavoidable that bacteria adhering to food or its packaging, Yeast, mushrooms or similar spread quickly in the interior (2) of the refrigerator (1). Therefore in the cooling device (1) integrates a measuring device (3, 4, 5) which is capable of direct or indirect quantification of germs and spores present in the interior (2). In addition to a sensor (3), this measuring device (3, 4, 5) includes, for example is designed as an electrochemical or biochemical sensor, at least one evaluation electronics (4) and advantageously also a display element (5). It becomes the total bacterial count determined directly or indirectly and with a basic limit value stored in the evaluation electronics (4) compared. The total germ count is the germ and spore load in the refrigerator (1), with high values for bacteria, mold and Yeasts are crucial. It is well known that a variety of mushrooms and Bacteria excretes nitrite. This knowledge allows from a determined nitrite concentration a conclusion on the degree of contamination of the interior (2) of the refrigerator (1) derive. Mushrooms, mold or the like are not always also visually recognizable, but through Nevertheless, biochemical sensors can be recorded directly or indirectly. If the measurement e.g. has high nitrite concentrations, e.g. > 1mg / l, can be simultaneously from one high germ load on the interior (2) can be assumed. The sensor (3) serves indirect germ detection preferably a detection of the metabolic products of Bacteria, yeasts and / or molds, e.g. Nitrite concentrations. This turns into nitrite either measured directly or oxidation is used as the measuring method and nitrite Oxidized to nitrate in order to deduce the degree of contamination of the interior (2).
Um rechtzeitig auf eine notwendige Reinigung hinweisen zu können, ist der Sensor (3) an mindestens einer von Kondensat umspülten Stelle des Innenraums (2) angeordnet. Beispielsweise sichert eine Anordnung des Sensors (3) an einem Verdampfer (7), welcher an Rück-, Seitenwand, Decken- oder Bodenfläche angeordnet sein kann, gute Messergebnisse. Ebenso ist aber auch eine Anordnung des Sensors (3) in oder an einem Kondensatauffangbehälter (8) oder in der Verdampferschale ein sinnvoller Ort zur Anordnung des Sensors. Eine kleine Veränderung im Innenraum, wobei zwischen Kondensatauffangbehälter (8) und dem Rückwandverdampfer (7) eine Abtropfleiste (6) angeordnet ist, schafft einen Ort für eine besonders sichere Meßwerterfassung des Sensors (3). Dabei bietet es sich an, den Sensor (3) am unteren Ende dieser Abtropfleiste (6) anzuordnen. Von einem besonderen Vorteil ist es, wenn der Sensor (3) auswechselbar ist. Insbesondere biochemische Sensoren sollten auswechselbar sein, da sie sich nach einer bestimmten Einsatzzeit, je nach Ausgestaltung, sich von selbst erschöpfen. Ein Beispiel für einen auswechselbaren Sensor ist eine Ausbildung in Form eines Chips. Auch eine automatische oder manuell einstellbare Reinigung eines Sensors ist sinnvoll und beispielsweise durch eine kurzzeitige Potentialumkehr oder Potentialerhöhung erreichbar.The sensor (3) is on to indicate that cleaning is necessary in good time at least one point of the interior (2) flushed with condensate. For example, arranging the sensor (3) on an evaporator (7) which secures Rear, side wall, ceiling or floor surface can be arranged, good measurement results. Likewise, an arrangement of the sensor (3) in or on a condensate collector is also (8) or in the evaporator dish a sensible place to arrange the sensor. A small change in the interior, being between the condensate collector (8) and a drip rail (6) is arranged on the rear wall evaporator (7), creates a place for one Particularly reliable measurement value acquisition of the sensor (3). It is advisable to use the sensor (3) to be arranged at the lower end of this drip tray (6). It is of particular advantage if the sensor (3) can be replaced. In particular, biochemical sensors should be interchangeable be, because after a certain period of use, depending on the design, exhaust itself. An example of a replaceable sensor is training in Shape of a chip. Also automatic or manually adjustable cleaning of a sensor is useful and, for example, through a brief reversal of potential or increase in potential reachable.
Die Auswerteelektronik (4) ist vorzugsweise in die bereits im Kühlgerät (1) vorhandene Elektronik integriert oder in deren Nähe angeordnet. Sie (4) kann aber auch an einer anderen Stelle separat untergebracht sein. Das Anzeigeelement (5) ist vorzugsweise an der Bedienblende, wie sie für Kühl- und/oder Gefriergeräte bekannt ist, angeordnet oder in den Frontbereich der Tür (10) integriert. An der Bedienblende kann auch ein Bedienelement (11) angeordnet sein, über welches ein manuelles Aus- und Einschalten der Messeinrichtung (3, 4, 5) vorgenommen werden kann. Ein Ausschalten sollte insbesondere direkt nach einer Innenreinigung des Kühlgerätes (1) für einen definierten Zeitraum erfolgen, damit Interferenzen mit Putzmittelresten vermieden werden. Danach wird die Messeinrichtung (3, 4, 5) entweder automatisch oder manuell wieder eingeschaltet.The evaluation electronics (4) are preferably in the electronics already present in the cooling device (1) integrated or arranged in their vicinity. You (4) can also in another place be housed separately. The display element (5) is preferably on the control panel, such as it is known for refrigerators and / or freezers, arranged or in the front area of the Integrated door (10). A control element (11) can also be arranged on the control panel, via which the measuring device (3, 4, 5) is switched off and on manually can be. Switching off should be carried out immediately after cleaning the inside of the cooling unit (1) for a defined period of time to prevent interference with cleaning agent residues be avoided. The measuring device (3, 4, 5) is then either automatic or manually switched on again.
Umfangreiche Versuche bestätigen, dass eine aktuell ermittelte Nitritkonzentration durch eine Reinigung des Innenraumes (2) auf mindestens die Hälfte gesenkt wird. Die Messung der aktuellen Nitritkonzentration erfolgt am besten durch den Sensor (3) während des Durchspülens mit im Innenraum anfallendem Kondensat, wobei in regelmäßigen oder unregelmäßigen Abständen die Messung vorgenommen wird. Die Messabstände zur aktuellen Messwerterfassung sind entweder vom Hersteller oder vom Benutzer bestimmbar und über die Elektronik (4) abrufbar. In der Auswerteelektronik (4) ist ein Bezugsgrenzwert für einen sauberen Innenraum (2) des Kühlschrankes (1) abgelegt, mit dem jeder aktuell erfasste Wert verglichen wird. Wird dieser Bezugsgrenzwert überschritten, wird ein Warnsignal ausgelöst, welches z.B. an einem Anzeigeelement optisch und/oder akustisch angezeigt wird. Das Warnsignal wird nach einer vorbestimmten Zeit, die ebenfalls in der Elektronik (4) ablegbar ist, unterbrochen und periodisch wieder aktiviert. Diese Warnung wird solange fortgesetzt, bis eine Reinigung des Innenraumes vorgenommen wird oder eine manuelles Abstellen des Warnsignals erfolgt ist. Die Zeitunterbrechung zum Warnen kann auch eine erneute, aktuelle Messwerterfassung so lange unterbrechen bis tatsächlich die Reinigung des Innenraumes erfolgt ist. Außerdem ist aber auch möglich, dass die Zeitspanne zwischen den Warnungen kürzer ist, als die Abstände der einzelnen aktuellen Messwerterfassungen. Da die Keimbelastung nach fortgeschrittener Zeit überwiegend größer wird, d.h. auch immer höhere Konzentrationen der Stoffwechselprodukte, wie z.B. Nitrit erfasst werden, kann auch eine maximal mögliche Konzentration als Bezugsgrenzwert in der Auswerteelektronik (4) abgelegt werden. Beim Erreichen dieses Grenzwertes sollte das Warnsignal nicht mehr ausgesetzt werden. Eine ununterbrochene Anzeige soll die fortgeschrittene Verkeimung verdeutlichen, um einer Gesundheitsgefährdung beim Verzehr der eingelagerten Nahrungsmittel möglichst auszuschließen.Extensive tests confirm that a currently determined nitrite concentration by a Cleaning the interior (2) is reduced to at least half. Measuring the current Nitrite concentration is best carried out by the sensor (3) during the flushing condensate accumulating in the interior, at regular or irregular intervals the measurement is made. The measuring distances to the current measured value acquisition are can be determined either by the manufacturer or by the user and can be called up via the electronics (4). In the evaluation electronics (4) there is a reference limit value for a clean interior (2) of the Fridge (1) with which each currently recorded value is compared. Will this If the reference limit is exceeded, a warning signal is triggered, which e.g. on a display element is displayed optically and / or acoustically. The warning signal is after a predetermined Time that can also be stored in the electronics (4) is interrupted and periodically again activated. This warning continues until the interior is cleaned is carried out or the warning signal has been switched off manually. The time out for warning purposes, a new, current measurement value acquisition can be interrupted as long until the interior has actually been cleaned. But also is it is possible that the time between warnings is shorter than the distances between the individual current data acquisition. Since the germ load predominantly after advanced time gets bigger, i.e. also ever higher concentrations of metabolic products, such as e.g. Nitrite can also be recorded, a maximum possible concentration as a reference limit be stored in the evaluation electronics (4). When this limit is reached the warning signal can no longer be suspended. A continuous display is said to be the advanced one Germination to clarify a health hazard when eating the exclude stored food as far as possible.
Allerdings sollte dem Benutzer auch die Möglichkeit gegeben werden, dass er die Messwerterfassung und/oder eine Warnung ausschalten kann, wenn er nicht an einer derartigen Information interessiert ist bzw. sich dadurch evtl. sogar belästigt fühlt.However, the user should also be given the option of collecting the measured values and / or can turn off a warning if he does not have such information is interested or may even feel bothered by it.
Das Vorhandensein von Keimen lässt sich neben einer Messung eines der Stoffwechselprodukte von Bakterien, Hefen und/oder Schimmelpilze (wie z.B. Nitritkonzentration) auch direkt durch eine biochemische Sensierung von Bakterien, Hefen und/oder Schimmelpilzen o.ä. ermitteln. Daher sind je nach Ziel unterschiedlich ausgebildete Sensoren (3) einsetzbar, z.B. elektrochemische oder biochemische Sensoren.The presence of germs can be measured alongside a measurement of one of the metabolites bacteria, yeasts and / or mold (such as nitrite concentration) directly by biochemical sensing of bacteria, yeast and / or mold or the like determine. Depending on the destination, differently designed sensors (3) can therefore be used, e.g. electrochemical or biochemical sensors.
Auch andere Verfahren, beispielsweise ein Abklatsch mit einem anschließenden Bebrüten kann zur Keimermittlung führen. Den meisten Benutzern eines Haushalt-Kühlschrankes (1) fehlen allerdings die Kenntnisse und Voraussetzungen für eine Durchführung derartiger Verfahren und ein derartiger Aufwand findet sicherlich auch nur wenig Akzeptanz beim Kunden. Ein Abklatsch muss sporadisch per Hand durchgeführt werden und die anschließenden Messungen erfordern Erfahrungen im Umgang mit biochemischen Verfahren. Eine solche Möglichkeit scheidet für einen im Haushalt genutzten Kühlschrank (1) aus, weil eine Warnung vor einer zu hohen Verkeimung im Innenraum (2) nicht rechtzeitig erfolgen kann. Die Anordnung eines Sensors (3) zur automatischen und gebrauchsbegleitenden Erfassung der Verkeimung stellt also eine einfache und bequeme Möglichkeit dar, um indirekt über den hygienischen Zustand seines Kühlschrankes (1) eine schnelle und orientierende Aussage zu erhalten. Ein kontinuierlich arbeitender Sensor (3) gewährleistet eine zuverlässige Warnung bei vorhandener Verkeimung.Other methods, for example a contact with a subsequent incubation, can also be used lead to germ detection. Most users of a household refrigerator (1) are missing however the knowledge and requirements for carrying out such procedures and Such an effort will surely find little acceptance by the customer. A copy must be carried out sporadically by hand and require the subsequent measurements Experience in dealing with biochemical processes. Such a possibility for a refrigerator (1) used in the household because of a warning that the appliance is too high Contamination in the interior (2) cannot take place in time. The arrangement of a sensor (3) for the automatic and in-service recording of the contamination is a simple and convenient way to indirectly know about the hygienic condition of his Refrigerator (1) to get a quick and orientative statement. A continuously working Sensor (3) ensures a reliable warning if there is any contamination.
In der Figur 2 ist ein Kühlschrank (1) dargestellt, dessen seitlich angeschlagene Tür (10) geöffnet dargestellt ist. Die Tür (10) enthält auf ihrer Innenseite Abstellmöglichkeiten, insbesondere für schmales bzw. hohes Kühlgut. Auch an der Innenseite der Tür kann zusätzlich zum Innenraum (2) ein weiterer Sensor (3) zur Messung der Verkeimung angeordnet sein. Der Innenraum (2) ist entsprechend dem in Figur 1 beschriebenen Kühlgerät ausgestaltet. Grundsätzlich sammelt sich im Innenraum (2) die Feuchtigkeit am Verdampfer, kondensiert dort, vereist und schmilzt wieder. Daher ist eine ideale Stelle für die Anordnung eines Sensors (3) in der Ablaufrinne (8) oder in der Verdampferschale.FIG. 2 shows a refrigerator (1) whose door (10) hinged on the side is open is shown. The inside of the door (10) contains storage options, in particular for narrow or high refrigerated goods. Also on the inside of the door can in addition to Interior (2), a further sensor (3) for measuring the contamination can be arranged. The The interior (2) is designed in accordance with the cooling device described in FIG. 1. Basically, the moisture on the evaporator collects in the interior (2) and condenses there, icy and melting again. It is therefore an ideal location for the placement of a sensor (3) in the gutter (8) or in the evaporator dish.
Claims (24)
dadurch gekennzeichnet,
dass das Kühlgerät (1) im Innenraum (2) eine Messeinrichtung (3, 4, 5) zur Indikation von Keimen und/oder Sporen aufweist.Cooling device with a refrigeration device, an interior and a collecting device for condensate arising in the interior,
characterized,
that the cooling device (1) has a measuring device (3, 4, 5) in the interior (2) for the indication of germs and / or spores.
dadurch gekennzeichnet,
dass die Messeinrichtung (3, 4, 5) mindestens einen Sensor (3) und eine Auswerteelektronik (4) umfasst.Cooling device according to claim 1
characterized,
that the measuring device (3, 4, 5) comprises at least one sensor (3) and evaluation electronics (4).
dadurch gekennzeichnet,
dass der Sensor (3) an einem von Kondensat aus dem Innenraum (2) durchspülten Ort angeordnet ist.Cooling device according to claim 1 or 2
characterized,
that the sensor (3) is arranged at a location flushed with condensate from the interior (2).
dadurch gekennzeichnet,
dass der Sensor (3) mit der Auswerteelektronik (4) und/oder einem Anzeigeelement (5) verbunden ist.Cooling device according to at least one of claims 1 to 3
characterized,
that the sensor (3) is connected to the evaluation electronics (4) and / or a display element (5).
dadurch gekennzeichnet,
dass der Sensor (3) als biochemischer Sensor zur selektiven Erfassung von Bakterien, Hefen und/oder Schimmelpilzen ausgebildet ist.Cooling device according to at least one of claims 1 to 4
characterized,
that the sensor (3) is designed as a biochemical sensor for the selective detection of bacteria, yeast and / or mold.
dadurch gekennzeichnet,
dass der Sensor (3) als biochemischer oder elektrochemischer Sensor zur Erfassung von Stoffwechselprodukten der Bakterien, Hefen und/oder Schimmelpilze ausgebildet ist.Cooling device according to at least one of claims 1 to 4
characterized,
that the sensor (3) is designed as a biochemical or electrochemical sensor for detecting metabolic products of bacteria, yeasts and / or molds.
dadurch gekennzeichnet,
dass der Sensor (3) zur Nitrit- oder Nitrat-Erfassung ausgebildet ist. Cooling device according to at least one of claims 1 to 6
characterized,
that the sensor (3) is designed for nitrite or nitrate detection.
dadurch gekennzeichnet,
dass der Sensor (3) entnehmbar im Kühlgerät (1) angeordnet ist.Cooling device according to at least one of claims 1 to 7
characterized,
that the sensor (3) is removably arranged in the cooling device (1).
dadurch gekennzeichnet,
dass der Sensor (3) im Innenraum (2) und die Auswerteelektronik (4) und/oder das Anzeigeelement (5) außerhalb des Innenraumes (2) angeordnet sind.Cooling device according to at least one of claims 1 to 8
characterized,
that the sensor (3) in the interior (2) and the evaluation electronics (4) and / or the display element (5) are arranged outside the interior (2).
dadurch gekennzeichnet,
dass der Sensor (3) in oder an einem Kondensatauffangbehälter (8) angeordnet ist.Cooling device according to at least one of claims 1 to 9
characterized,
that the sensor (3) is arranged in or on a condensate collector (8).
dadurch gekennzeichnet,
dass der Sensor (3) an einem Rückwandverdampfer (7) oder in einer Verdampferschale angeordnet ist.Cooling device according to at least one of claims 1 to 9
characterized,
that the sensor (3) is arranged on a rear wall evaporator (7) or in an evaporator dish.
dadurch gekennzeichnet,
dass zwischen dem Kondensatauffangbehälter (8) und dem Rückwandverdampfer (7) eine Abtropfleiste (6) angeordnet ist, an welcher der Sensor (3) angeordnet ist.Cooling device according to at least one of claims 1 to 9
characterized,
that a drip bar (6) is arranged between the condensate collector (8) and the rear wall evaporator (7), on which the sensor (3) is arranged.
dadurch gekennzeichnet,
dass ein Bedienelement (11) zur Unterbrechung der Messwerterfassung durch die Messeinrichtung (3, 4, 5) am Kühlgerät (1) angeordnet ist.Cooling device according to claim 12
characterized,
that an operating element (11) for interrupting the measurement value acquisition by the measuring device (3, 4, 5) is arranged on the cooling device (1).
dadurch gekennzeichnet,
dass eine Messeinrichtung (3, 4, 5) selektiv Messwerte von Bakterien, Hefen und/oder Schimmelpilzen oder von mindestens einem derer Stoffwechselprodukte erfasst und auswertet wobei über den Sensor (3) die Messwerte in definierbaren Zeitabständen erfasst und diese Messwerte in der Auswerteelektronik (4) mit dort abgelegten maximal zulässigen Verkeimungsgrenzwerten verglichen werden und
dass beim Überschreiten der Verkeimungsgrenzwerte durch mindestens einen aktuell erfassten Messwert ein Signal an das Anzeigeelement (5) weitergegeben wird. A method for indicating germs in a cooling device according to at least one of claims 1 to 13
characterized,
that a measuring device (3, 4, 5) selectively records and evaluates measured values of bacteria, yeast and / or mold or of at least one of their metabolic products, whereby the measured values are recorded at definable time intervals via the sensor (3) and these measured values in the evaluation electronics (4 ) are compared with the maximum admissible germination limit values stored there and
that a signal is passed on to the display element (5) when the germination limit values are exceeded by at least one currently measured value.
dadurch gekennzeichnet,
dass der Sensor (3) die aktuelle Messwerterfassung während eines Durchspülens mit Kondensat vornimmt.A method for indicating germs in a cooling device according to claim 14
characterized,
that the sensor (3) performs the current measured value acquisition while flushing with condensate.
dadurch gekennzeichnet,
dass aus der Höhe der Konzentration der Stoffwechselprodukte von Bakterien, Hefen und/oder Schimmelpilzen die Belastung mit Keimen und/oder Sporen herleitbar ist.Method according to one of claims 14 or 15
characterized,
that the amount of germs and / or spores can be derived from the level of the concentration of the metabolites of bacteria, yeasts and / or molds.
dadurch gekennzeichnet,
dass die Messwerte vorn Sensor (3) direkt gemessen werden.Method according to at least one of claims 14 to 16
characterized,
that the measured values from the sensor (3) are measured directly.
dadurch gekennzeichnet,
dass die Ermittlung einer Nitritkonzentration indirekt durch eine elektrochemische Reaktion vorgenommen wird, bei welcher Nitrit zu Nitrat oxidiert wird.Method according to at least one of claims 14 to 16
characterized,
that the determination of a nitrite concentration is carried out indirectly by an electrochemical reaction in which nitrite is oxidized to nitrate.
dadurch gekennzeichnet,
dass das Anzeigeelement (5) ein optisches und/oder akustisches Warnsignal darstellt.Method according to at least one of claims 14 to 18
characterized,
that the display element (5) represents an optical and / or acoustic warning signal.
dadurch gekennzeichnet,
dass das Warnsignal nach einer Zeitspanne unterbrochen wird, welche kleiner als die Zeitspanne zwischen den aktuellen Messungen ist, und
dass nach einer danach folgenden Meßwerterfassung durch den Sensor (3) erneut ein Warnsignal angezeigt wird.Method according to at least one of claims 14 to 19
characterized,
that the warning signal is interrupted after a time period which is shorter than the time period between the current measurements, and
that after a subsequent measurement value acquisition by the sensor (3), a warning signal is displayed again.
dadurch gekennzeichnet,
dass das Warnsignal beim Überschreiten mindestens eines in der Auswerteelektronik (4) abgelegten maximal zulässigen Verkeimungsgrenzwertes dauerhaft angezeigt wird.Method according to at least one of claims 14 to 19
characterized,
that the warning signal is permanently displayed when at least one of the maximum permissible contamination levels stored in the evaluation electronics (4) is exceeded.
dadurch gekennzeichnet,
dass die Messeinrichtung (3, 4, 5) nach einer Reinigung des Kühlgerätes (1) automatisch oder manuell ausgeschaltet und nach einem definierten Zeitraum wieder eingeschaltet wird. Method according to at least one of claims 16 to 21
characterized,
that the measuring device (3, 4, 5) is switched off automatically or manually after cleaning the cooling device (1) and is switched on again after a defined period of time.
dadurch gekennzeichnet,
dass nach einer Reinigung des Kühlgerätes (1) eine Reinigung des Sensors (3) vorgenommen wird.Method according to at least one of claims 16 to 22
characterized,
that after cleaning the cooling device (1) the sensor (3) is cleaned.
dadurch gekennzeichnet,
dass eine Reinigung des Sensors elektrochemisch durch Potentialumkehr oder Potentialerhöhung vorgenommen wird.The method of claim 23
characterized,
that the sensor is cleaned electrochemically by reversing or increasing the potential.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19919448 | 1999-04-29 | ||
| DE19919448A DE19919448A1 (en) | 1999-04-29 | 1999-04-29 | Cooling device and method for indicating germs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1048912A1 true EP1048912A1 (en) | 2000-11-02 |
| EP1048912B1 EP1048912B1 (en) | 2004-06-16 |
Family
ID=7906238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00108812A Expired - Lifetime EP1048912B1 (en) | 1999-04-29 | 2000-04-26 | Refrigerating apparatus and method for indicating germs |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1048912B1 (en) |
| AT (1) | ATE269524T1 (en) |
| DE (2) | DE19919448A1 (en) |
| ES (1) | ES2218023T3 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002046703A1 (en) * | 2000-12-08 | 2002-06-13 | Siemens Aktiengesellschaft | Device for detecting and/or transmitting at least one environmental influence, method for producing the same and use thereof |
| US6903958B2 (en) | 2000-09-13 | 2005-06-07 | Siemens Aktiengesellschaft | Method of writing to an organic memory |
| US6960489B2 (en) | 2000-09-01 | 2005-11-01 | Siemens Aktiengesellschaft | Method for structuring an OFET |
| US7786818B2 (en) | 2004-12-10 | 2010-08-31 | Polyic Gmbh & Co. Kg | Electronic component comprising a modulator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1309994A2 (en) | 2000-08-18 | 2003-05-14 | Siemens Aktiengesellschaft | Encapsulated organic-electronic component, method for producing the same and use thereof |
| DE10226370B4 (en) | 2002-06-13 | 2008-12-11 | Polyic Gmbh & Co. Kg | Substrate for an electronic component, use of the substrate, methods for increasing the charge carrier mobility and organic field effect transistor (OFET) |
| US8044517B2 (en) | 2002-07-29 | 2011-10-25 | Polyic Gmbh & Co. Kg | Electronic component comprising predominantly organic functional materials and a method for the production thereof |
| DE10340643B4 (en) | 2003-09-03 | 2009-04-16 | Polyic Gmbh & Co. Kg | Printing method for producing a double layer for polymer electronics circuits, and thereby produced electronic component with double layer |
| DE102004040831A1 (en) | 2004-08-23 | 2006-03-09 | Polyic Gmbh & Co. Kg | Radio-tag compatible outer packaging |
| DE102004059465A1 (en) | 2004-12-10 | 2006-06-14 | Polyic Gmbh & Co. Kg | recognition system |
| DE102004063435A1 (en) | 2004-12-23 | 2006-07-27 | Polyic Gmbh & Co. Kg | Organic rectifier |
| DE102005009819A1 (en) | 2005-03-01 | 2006-09-07 | Polyic Gmbh & Co. Kg | electronics assembly |
| DE102005017655B4 (en) | 2005-04-15 | 2008-12-11 | Polyic Gmbh & Co. Kg | Multilayer composite body with electronic function |
| DE102005031448A1 (en) | 2005-07-04 | 2007-01-11 | Polyic Gmbh & Co. Kg | Activatable optical layer |
| DE102005035589A1 (en) | 2005-07-29 | 2007-02-01 | Polyic Gmbh & Co. Kg | Manufacturing electronic component on surface of substrate where component has two overlapping function layers |
| DE102008012444A1 (en) | 2008-03-04 | 2009-09-10 | Aweco Appliance Systems Gmbh & Co. Kg | Freshness testing mobile hand-held device for e.g. meat during purchase, has evaluating unit with manual input device for manual input of food or food class, where unit selects determined evaluation and/or measuring program based on input |
| CN112577249A (en) * | 2019-09-27 | 2021-03-30 | 博西华电器（江苏）有限公司 | Sterilization device and refrigeration appliance |
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| US1979590A (en) * | 1934-05-25 | 1934-11-06 | Carl G Vretman | Process and apparatus for conditioning air in refrigerators |
| GB1093080A (en) * | 1965-10-24 | 1967-11-29 | Clark Equipment Co | Alarm device for warning of accumulation of liquid |
| DE2344261A1 (en) | 1973-09-01 | 1975-03-06 | Collo Rheincollodium Koeln Gmb | Compressor-type domestic refrigerator with air circulation - has fan controlled by compressor thermostat, and ducting in cabinet insulation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5099873A (en) * | 1991-09-09 | 1992-03-31 | Sanchez Gabriel G | Water cooler drain pan apparatus |
| US5887442A (en) * | 1997-06-04 | 1999-03-30 | Howard; Jeffery T. | Refrigeration condenser filter system |
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- 1999-04-29 DE DE19919448A patent/DE19919448A1/en not_active Withdrawn
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- 2000-04-26 EP EP00108812A patent/EP1048912B1/en not_active Expired - Lifetime
- 2000-04-26 DE DE50006790T patent/DE50006790D1/en not_active Expired - Fee Related
- 2000-04-26 AT AT00108812T patent/ATE269524T1/en not_active IP Right Cessation
- 2000-04-26 ES ES00108812T patent/ES2218023T3/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1979590A (en) * | 1934-05-25 | 1934-11-06 | Carl G Vretman | Process and apparatus for conditioning air in refrigerators |
| GB1093080A (en) * | 1965-10-24 | 1967-11-29 | Clark Equipment Co | Alarm device for warning of accumulation of liquid |
| DE2344261A1 (en) | 1973-09-01 | 1975-03-06 | Collo Rheincollodium Koeln Gmb | Compressor-type domestic refrigerator with air circulation - has fan controlled by compressor thermostat, and ducting in cabinet insulation |
| US4829774A (en) * | 1985-11-28 | 1989-05-16 | Franz Welz Internationale Transporte Gesellschaft Mit Beschrankter Haftung | Transportable refrigerating container |
| EP0312060B1 (en) | 1987-10-14 | 1994-05-04 | INDUSTRIE ZANUSSI S.p.A. | Automatic refrigeration apparatus provided with a sterilized storage compartment |
| DE4142365A1 (en) * | 1990-12-20 | 1992-07-02 | Gold Star Co | Contamination measurement arrangement for air cleaning system - contains contamination sensor, microcomputer, memory unit, display and air throughput controller |
| US5230220A (en) * | 1991-05-23 | 1993-07-27 | Samsung Electronics Co., Ltd. | Sterilizing/deodorizing apparatus for use in a refrigerator |
| US5581189A (en) * | 1992-03-17 | 1996-12-03 | Brenn; Eric W. | Water purity testing system having reversing polarity |
| US5558841A (en) * | 1993-04-26 | 1996-09-24 | Olympus Optical Co., Ltd. | Washing/sterilizing apparatus for an endoscope and method for washing/sterilizing its water supplying system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6960489B2 (en) | 2000-09-01 | 2005-11-01 | Siemens Aktiengesellschaft | Method for structuring an OFET |
| US6903958B2 (en) | 2000-09-13 | 2005-06-07 | Siemens Aktiengesellschaft | Method of writing to an organic memory |
| WO2002046703A1 (en) * | 2000-12-08 | 2002-06-13 | Siemens Aktiengesellschaft | Device for detecting and/or transmitting at least one environmental influence, method for producing the same and use thereof |
| US7786818B2 (en) | 2004-12-10 | 2010-08-31 | Polyic Gmbh & Co. Kg | Electronic component comprising a modulator |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE269524T1 (en) | 2004-07-15 |
| DE50006790D1 (en) | 2004-07-22 |
| ES2218023T3 (en) | 2004-11-16 |
| EP1048912B1 (en) | 2004-06-16 |
| DE19919448A1 (en) | 2000-11-02 |
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