EP1199964B1 - Heat maintenance device - Google Patents
Heat maintenance device Download PDFInfo
- Publication number
- EP1199964B1 EP1199964B1 EP00958287A EP00958287A EP1199964B1 EP 1199964 B1 EP1199964 B1 EP 1199964B1 EP 00958287 A EP00958287 A EP 00958287A EP 00958287 A EP00958287 A EP 00958287A EP 1199964 B1 EP1199964 B1 EP 1199964B1
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- EP
- European Patent Office
- Prior art keywords
- heating element
- water
- substrate
- warm
- air space
- 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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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
- B65D81/3813—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container being in the form of a box, tray or like container
- B65D81/3816—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container being in the form of a box, tray or like container formed of foam material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2585/00—Containers, packaging elements or packages specially adapted for particular articles or materials
- B65D2585/30—Containers, packaging elements or packages specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D2585/36—Containers, packaging elements or packages specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for biscuits or other bakery products
- B65D2585/363—Containers, packaging elements or packages specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for biscuits or other bakery products specific products
- B65D2585/366—Pizza
Definitions
- the invention relates to an arrangement for keeping a substrate warm, the releases water vapor at least in the heated state.
- the drying elements are designed to dry objects or to keep dry.
- the drying elements can deliberate addition of water through released sorption heat other objects heat.
- it is not known from this document To keep food warm, which naturally emits moisture.
- US-A 5,159,177 to keep food warm known.
- the object of the invention is an arrangement to provide the kind mentioned at the beginning with which keeping warm a meal realized with simple and inexpensive measures can be.
- the invention is based primarily on the knowledge that, on the one hand, many Give food in the heated state water vapor and that on the other hand sorb certain materials exothermic water vapor.
- the arrangement therefore provides that at least in the heated state Steam-emitting food in a common air space is arranged with a heating element that emits heat while absorbing water Contains material.
- the airspace is expediently opposite heat-insulated the environment, for example by the interior an insulated container for receiving the substrate and the heating element is formed.
- the substrate is preferably made either by convection or heat conduction over the air space or over a heat-conducting contact surface between substrate and heating element.
- the heat-emitting material should release heat of adsorption of at least 2000 kJ, in particular about 4000 kJ per kg Water and a specific heat of less than 50 kJ / kg, preferably less than 10 kJ / kg.
- the heat emitting Material is preferably porous with an average pore size of 0.2 to 4 nm and can be a granulate or a powder with an average grain diameter from 0.1 to 4 mm.
- the heating element expediently has a material-containing bag permeable to air and water vapor, which preferred is designed as a textile bag.
- the heating element can be used cyclically, i.e. it gets desorbed Condition used and gives warmth while absorbing water from. As soon as a partial or complete saturation of the heating element is reached with water, the heating element can be heated by regenerate comparatively dry atmosphere.
- the one for regeneration required temperature can be between less than 100 ° C be around 400 ° C. Accordingly, the textile material of the bag as well as its suture material from a temperature of at least up to 200 ° C., preferably material resistant to temperatures up to 400 ° C.
- the heat-emitting material embedded directly in a dimensionally stable support body can, for example made of a fibrous material that is permeable to water vapor exist, be plate-shaped and as a base plate for the serve to keep warm substrate.
- the support body can also be integrated directly into the insulating container, wherein the insulated container can be a cardboard box.
- Such cardboard boxes usually have a layer structure with internal cavities on.
- the heat-emitting material can then be in the form of granules or powder arrange in the cavities during the production of the cardboard box.
- Farther is also a kind of impregnation, for example, of a supply roll tearable paper trained support body possible, as far as this added a sufficient amount of heat-emitting material can be.
- the arrangement according to the invention is particularly effective if all of them Water vapor released from the substrate also from the heating element can be included.
- the insulated container can therefore be closed in a vapor-tight manner. In this way ensures that the water vapor emitted by the substrate is not is lost to the environment, but mainly from the heating element is adsorbed, which can give off a higher amount of heat.
- the arrangement according to the invention is particularly suitable for dining keep warm. It is particularly advantageous that the food through Heating element not only be kept warm, but that at the same time the emitted from the food, often undesirable water vapor from the Heating element is adsorbed. Especially dishes like pizzas, french fries and the like, which are part of a service of a so-called Delivery services that are delivered to consumers often suffer the transport route a loss of quality due to condensing water vapor. In addition to cooling the food, softening is mainly responsible for a significant reduction in enjoyment for the consumer.
- the arrangement shown in the figure for keeping food warm exists essentially from a thermally insulated transport container 10, the can be closed vapor-tight by a cover 12.
- the container 10 and the Lids 12 consist, for example, of a foamed plastic material.
- the interior of the container 10 is dimensioned such that several Pizzas 16 packed in cardboard boxes 14 stacked one above the other from the container can be included.
- the cardboard boxes 14 have a plurality of ventilation openings on their long sides 18, through the water vapor emitted by the warm pizzas 16 20 can exit into the air space 22 of the container 10.
- the steam 20 is adsorbed by the heating element 24, whereby this heat of adsorption 26 releases, which heats the air space 22 and thus the pizzas 16.
- the water vapor escaping the pizzas 16 becomes simultaneously bound so that they cannot soften.
- the heating element 24 consists of a bag 28 which consists of an air and vapor-permeable textile material and that with a granulated Zeolite 30 is filled.
- the textile structure of the bag 28 is designed such that air and water vapor can pass through, but that Zeolite granules 30 is retained.
- the zeolite 30 has a heat of adsorption of about 3700 kJ per kg absorbed Water at a specific heat of only about 0.9 kJ / kg on, so that a high efficiency for the heating element is achieved because almost all of the heat of adsorption to heat the airspace 22 and so that the pizza 16 is available.
- Another advantage of the zeolite is that it is food neutral and therefore not special Safety measures when arranging the heating element 24 in the container 10 must be taken.
- the textile material of the bag 28 including the seams is up to about 400 ° C temperature resistant. This allows the heating element 24, for example regenerate easily in that it is for desorption the water taken up by the zeolite 30 in a pizza oven or is heated in a microwave oven.
- the invention relates to an arrangement for keeping a substrate warm, at least when heated Releases water vapor.
- Substrate 16 in a common air space 22 with a heating element 24 is arranged, which is a heat-emitting material while absorbing water 30 contains.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Cookers (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Finger-Pressure Massage (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
Abstract
Description
Die Erfindung betrifft eine Anordnung zum Warmhalten eines Substrats, das zumindest im erwärmten Zustand Wasserdampf abgibt.The invention relates to an arrangement for keeping a substrate warm, the releases water vapor at least in the heated state.
Bei bestimmten Gegenständen, insbesondere auch bei Speisen, besteht oftmals das Bedürfnis, diese nach einer Erwärmung für eine begrenzte Zeit auf einem erhöhten Temperaturniveau zu halten, so z.B. zu Transportzwecken. Zu diesem Zweck ist es bereits bekannt, die erwärmten Gegenstände in einem isolierten Behälter aufzubewahren, der gegebenenfalls zusätzlich mit einer Fremdheizung versehen sein kann. Als Fremdheizungen werden bisher beispielsweise elektrische Heizungen oder Latentwärmespeicher eingesetzt. Ein Nachteil der Verwendung derartiger Fremdheizungen besteht darin, daß diese in speziell dafür konstruierte Behälter integriert werden müssen und zudem recht kostspielig sind.With certain objects, in particular also with food often the need to warm this up for a limited time to keep at an elevated temperature level, e.g. for transportation purposes. For this purpose, it is already known the heated objects to be kept in an insulated container, if necessary additionally can be provided with external heating. As external heaters previously used, for example, electrical heaters or latent heat storage. A disadvantage of using such external heaters is in that they are integrated in specially designed containers must and are also quite expensive.
Aus der EP-A 0 140 380 (Basis für den Oberbegriff von Anspruch 1 und Anspruch 6) sind Trocknungselemente und Verfahren zu deren Verwendung bekannt, bei denen die Trocknungselemente hygroskopische Sorptionsmittel wie beispielsweise Zeolith, Kieselgel oder Bentonit aufweisen. Die Trocknungselemente sind dazu bestimmt, Gegenstände zu trocknen bzw. trocken zu halten. Weiterhin können die Trocknungselemente bei bewusster Wasserzugabe durch frei gesetzte Sorptionswärme andere Gegenstände erwärmen. Es ist aus dieser Schrift jedoch nicht bekannt, eine Speise warm zu halten, die von sich aus Feuchtigkeit abgibt. Weiterhin ist aus dem Dokument US-A 5,159,177 eine Anordnung zum Warmhalten einer Speise bekannt. Die dortige Anordnung offenbart jedoch kein Heizelement, das unter Wasseraufnahme wärmeabgebendes Material enthält. From EP-A 0 140 380 (Basis for the preamble of claim 1 and Claim 6) are drying elements and methods for their Known use in which the drying elements are hygroscopic Have sorbents such as zeolite, silica gel or bentonite. The drying elements are designed to dry objects or to keep dry. Furthermore, the drying elements can deliberate addition of water through released sorption heat other objects heat. However, it is not known from this document To keep food warm, which naturally emits moisture. Furthermore is an arrangement from document US-A 5,159,177 to keep food warm known. However, the arrangement there does not disclose Heating element that contains heat-emitting material while absorbing water.
Ausgehend hiervon besteht die Aufgabe der Erfindung darin, eine Anordnung der eingangs genannten Art bereitzustellen, mit der ein Warmhalten einer Speise mit einfachen und kostengünstigen Maßnahmen realisiert werden kann.Based on this, the object of the invention is an arrangement to provide the kind mentioned at the beginning with which keeping warm a meal realized with simple and inexpensive measures can be.
Zur Lösung dieser Aufgabe werden die in den Patentansprüchen 1 und 6
angegebenen Merkmalskombinationen vorgeschlagen. Vorteilhafte Ausgestaltungen
und Weiterbildungen der Erfindung ergeben sich aus den abhängigen
Ansprüchen. Bevorzugte Verwendungen der erfindungsgemäßen Anordnung
sind in den Ansprüchen 17 und 18 angegeben.To solve this problem, that in claims 1 and 6
specified combinations of features proposed. Advantageous configurations
and further developments of the invention result from the dependent
Claims. Preferred uses of the arrangement according to the invention
are given in
Die Erfindung geht vor allem von der Erkenntnis aus, daß einerseits viele Speisen im erwärmten Zustand Wasserdampf abgeben und daß andererseits gewisse Materialien Wasserdampf exotherm sorbieren. Die erfindungsgemäße Anordnung sieht daher vor, daß die zumindest im erwärmten Zustand Wasserdampf abgebende Speise in einem gemeinsamen Luftraum mit einem Heizelement angeordnet ist, das ein unter Wasseraufnahme wärmeabgebendes Material enthält. Zweckmäßig ist der Luftraum dabei gegenüber der Umgebung wärmeisoliert, indem er beispielsweise durch den Innenraum eines Isolierbehälters zur Aufnahme des Substrats und des Heizelements gebildet ist. Die Wärmeübertragung von dem Heizelement auf das Substrat erfolgt dabei vorzugsweise entweder durch Konvektion oder Wärmeleitung über den Luftraum oder über eine wärmeleitende Kontaktfläche zwischen Substrat und Heizelement.The invention is based primarily on the knowledge that, on the one hand, many Give food in the heated state water vapor and that on the other hand sorb certain materials exothermic water vapor. The invention The arrangement therefore provides that at least in the heated state Steam-emitting food in a common air space is arranged with a heating element that emits heat while absorbing water Contains material. The airspace is expediently opposite heat-insulated the environment, for example by the interior an insulated container for receiving the substrate and the heating element is formed. The heat transfer from the heating element to the The substrate is preferably made either by convection or heat conduction over the air space or over a heat-conducting contact surface between substrate and heating element.
Von den verschiedenen unter Wasseraufnahme wärmeabgebenden Materialien wird zweckmäßig ein solches verwendet, das zum einen bei Wasseraufnahme eine möglichst große Wärmemenge freigibt und zum anderen selbst eine möglichst geringe spezifische Wärme aufweist, so daß ein möglichst hoher Anteil der erzeugten Wärme als Nutzwärme zur Verfügung steht. Vorzugsweise sollte das wärmeabgebende Material eine freiwerdende Adsorptionswärme von mindestens 2000 kJ, insbesondere etwa 4000 kJ je kg aufgenommenen Wassers und eine spezifische Wärme von weniger als 50 kJ/kg, vorzugsweise weniger als 10 kJ/kg aufweisen. Das wärmeabgebende Material ist vorzugsweise porös mit einer mittleren Porengröße von 0,2 bis 4 nm und kann ein Granulat oder ein Pulver mit einem mittleren Korndurchmesser von 0,1 bis 4 mm sein. Diese genannten Eigenschaften des wärmeabgebenden Materials werden insbesondere von Zeolithen erfüllt.Of the various materials that give off heat under water one is expediently used, on the one hand with water absorption releases as much heat as possible and secondly itself has the lowest possible specific heat, so that a possible a high proportion of the heat generated is available as useful heat. Preferably the heat-emitting material should release heat of adsorption of at least 2000 kJ, in particular about 4000 kJ per kg Water and a specific heat of less than 50 kJ / kg, preferably less than 10 kJ / kg. The heat emitting Material is preferably porous with an average pore size of 0.2 to 4 nm and can be a granulate or a powder with an average grain diameter from 0.1 to 4 mm. These mentioned properties of the heat emitting Materials are particularly fulfilled by zeolites.
Soweit das wärmeabgebende Material in Form eines Granulats oder Pulvers verwendet wird, weist das Heizelement zweckmäßig einen das Material enthaltenden, für Luft und Wasserdampf durchlässigen Beutel auf, der bevorzugt als Textilbeutel ausgebildet ist. So much for the heat-emitting material in the form of granules or powder is used, the heating element expediently has a material-containing bag permeable to air and water vapor, which preferred is designed as a textile bag.
Das Heizelement kann zyklisch verwendet werden, d.h. es wird im desorbierten Zustand eingesetzt und gibt dabei unter Wasseraufnahme Wärme ab. Sobald ein teilweiser oder vollständiger Sättigungszustand des Heizelements mit Wasser erreicht ist, läßt sich das Heizelement durch Erhitzen in vergleichsweise trockener Atmosphäre regenerieren. Die für die Regeneration erforderliche Temperatur kann dabei zwischen weniger als 100 °C bis etwa 400 °C betragen. Dementsprechend sollte das Textilmaterial des Beutels sowie dessen Nahtmaterial aus einem mindestens bis 200 °C, vorzugsweise bis 400 °C temperaturbeständigen Material bestehen.The heating element can be used cyclically, i.e. it gets desorbed Condition used and gives warmth while absorbing water from. As soon as a partial or complete saturation of the heating element is reached with water, the heating element can be heated by regenerate comparatively dry atmosphere. The one for regeneration required temperature can be between less than 100 ° C be around 400 ° C. Accordingly, the textile material of the bag as well as its suture material from a temperature of at least up to 200 ° C., preferably material resistant to temperatures up to 400 ° C.
In alternativer Ausgestaltung der Erfindung ist das wärmeabgebende Material direkt in einen formstabilen Tragkörper eingebettet. Dieser kann beispielsweise aus einem faserigen, für Wasserdampf durchlässigen Werkstoff bestehen, plattenförmig ausgebildet sein und als Unterlegplatte für das warmzuhaltende Substrat dienen. In weiterer Ausgestaltung der Erfindung kann der Tragkörper auch direkt in den Isolierbehälter integriert sein, wobei der Isolierbehälter eine Faltschachtel aus Pappe sein kann. Derartige Pappschachteln weisen in der Regel eine Lagenstruktur mit inneren Hohlräumen auf. Das wärmeabgebende Material läßt sich dann als Granulat oder Pulver bei der Herstellung der Pappschachtel in den Hohlräumen anordnen. Weiterhin ist auch eine Art Imprägnation eines zum Beispiel als von einer Vorratsrolle abreißbaren Papiers ausgebildeten Tragkörpers möglich, soweit von diesem eine hinreichende Menge an wärmeabgebenden Material aufgenommen werden kann.In an alternative embodiment of the invention, the heat-emitting material embedded directly in a dimensionally stable support body. This can, for example made of a fibrous material that is permeable to water vapor exist, be plate-shaped and as a base plate for the serve to keep warm substrate. In a further embodiment of the invention the support body can also be integrated directly into the insulating container, wherein the insulated container can be a cardboard box. Such cardboard boxes usually have a layer structure with internal cavities on. The heat-emitting material can then be in the form of granules or powder arrange in the cavities during the production of the cardboard box. Farther is also a kind of impregnation, for example, of a supply roll tearable paper trained support body possible, as far as this added a sufficient amount of heat-emitting material can be.
Die erfindungsgemäße Anordnung ist dann besonders effektiv, wenn sämtlicher von dem Substrat abgegebener Wasserdampf auch von dem Heizelement aufgenommen werden kann. In bevorzugter Ausgestaltung der Erfindung ist der Isolierbehälter daher dampfdicht verschließbar. Auf diese Weise ist sichergestellt, daß der von dem Substrat abgegebene Wasserdampf nicht an die Umgebung verloren wird, sondern überwiegend von dem Heizelement adsorbiert wird, wodurch dieses eine höhere Wärmemenge abgeben kann.The arrangement according to the invention is particularly effective if all of them Water vapor released from the substrate also from the heating element can be included. In a preferred embodiment of the invention the insulated container can therefore be closed in a vapor-tight manner. In this way ensures that the water vapor emitted by the substrate is not is lost to the environment, but mainly from the heating element is adsorbed, which can give off a higher amount of heat.
Die erfindungsgemäße Anordnung ist besonders dazu geeignet, Speisen warmzuhalten. Dabei ist von besonderem Vorteil, daß die Speisen durch das Heizelement nicht nur warmgehalten werden, sondern daß gleichzeitig der von den Speisen abgegebene, oft unerwünschte Wasserdampf von dem Heizelement adsorbiert wird. Gerade Speisen wie Pizzen, Pommes Frites und dergleichen, die im Rahmen einer Dienstleistung eines sogenannten Bringdienstes dem Konsumenten zugeliefert werden, erleiden oftmals auf dem Transportweg eine Qualitätseinbuße durch kondensierenden Wasserdampf. Ein Aufweichen ist neben einem Abkühlen der Speise hauptsächlich für eine erhebliche Genußminderung für den Konsumenten verantwortlich.The arrangement according to the invention is particularly suitable for dining keep warm. It is particularly advantageous that the food through Heating element not only be kept warm, but that at the same time the emitted from the food, often undesirable water vapor from the Heating element is adsorbed. Especially dishes like pizzas, french fries and the like, which are part of a service of a so-called Delivery services that are delivered to consumers often suffer the transport route a loss of quality due to condensing water vapor. In addition to cooling the food, softening is mainly responsible for a significant reduction in enjoyment for the consumer.
Demzufolge besteht eine bevorzugte Verwendung der erfindungsgemäßen Warmhalteanordnung im Warm- und Trockenhalten von Wasserdampf abgebenden Speisen, insbesondere von Pizzen beim Transport in einem luftundurchlässigen Isolierbehälter.Accordingly, there is a preferred use of the invention Keep warm arrangement in keeping warm and dry of water vapor Food, especially pizzas, when transported in an airtight container Insulated.
Im folgenden wird die Erfindung anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert. Die einzige Figur zeigt einen Querschnitt durch einen Transportbehälter mit zwei darin angeordneten Pizzen und einem Heizelement.In the following, the invention is illustrated schematically using one in the drawing illustrated embodiment explained in more detail. The only figure shows a cross section through a transport container with two arranged therein Pizzas and a heating element.
Die in der Figur dargestellte Anordnung zum Warmhalten von Speisen besteht
im wesentlichen aus einem wärmeisolierten Transportbehälter 10, der
durch einen Deckel 12 dampfdicht verschließbar ist. Der Behälter 10 und der
Deckel 12 bestehen beispielsweise aus einem aufgeschäumten Kunststoffmaterial.
Der Innenraum des Behälters 10 ist derart bemessen, daß mehrere
in Pappkartons 14 verpackte Pizzen 16 übereinandergestapelt von dem Behälter
aufgenommen werden können. The arrangement shown in the figure for keeping food warm exists
essentially from a thermally insulated
Die Pappkartons 14 weisen an ihren Längsseiten mehrere Entlüftungsöffnungen
18 auf, durch die von den warmen Pizzen 16 abgegebener Wasserdampf
20 in den Luftraum 22 des Behälters 10 austreten kann. Der Wasserdampf
20 wird von dem Heizelement 24 adsorbiert, wodurch dieses Adsorptionswärme
26 freigibt, die den Luftraum 22 und damit die Pizzen 16 erwärmt.
Hierdurch wird gleichzeitig der den Pizzen 16 entweichende Wasserdampf
gebunden, so daß diese nicht aufweichen können.The
Das Heizelement 24 besteht aus einem Beutel 28, der aus einem luft- und
dampfdurchlässigen Textilmaterial besteht und der mit einem granulierten
Zeolith 30 gefüllt ist. Die Textilstruktur des Beutels 28 ist derart ausgelegt,
daß zwar Luft und Wasserdampf hindurchtreten können, daß jedoch das
Zeolithgranulat 30 zurückgehalten wird.The
Das Zeolith 30 weist eine Adsorptionswärme von etwa 3700 kJ je kg aufgenommenen
Wassers bei einer spezifischen Wärme von nur etwa 0,9 kJ/kg
auf, so daß ein hoher Wirkungsgrad für das Heizelement erreicht wird, da
fast die gesamte Adsorptionswärme zu Erwärmen des Luftraums 22 und
damit der Pizzen 16 zur Verfügung steht. Ein weiterer Vorteil des Zeoliths
besteht darin, daß es lebensmittelneutral ist und daher keine besonderen
Sicherheitsmaßnahmen bei der Anordnung des Heizelements 24 in dem Behälter
10 getroffen werden müssen.The
Das Textilmaterial des Beutels 28 einschließlich der Nähte ist bis etwa
400 °C temperaturbeständig. Dadurch läßt sich das Heizelement 24 beispielsweise
auf einfache Weise dadurch regenerieren, daß es zur Desorption
des von dem Zeolith 30 aufgenommenen Wassers in einem Pizzaofen oder
einem Mikrowellenherd erhitzt wird. The textile material of the
Zusammenfassend ist folgendes festzuhalten: Die Erfindung betrifft eine Anordnung
zum Warmhalten eines Substrats, das zumindest im erwärmten Zustand
Wasserdampf abgibt. Um die Anordnung möglichst einfach und kostengünstig
zu gestalten, ist gemäß der Erfindung vorgesehen, daß das
Substrat 16 in einem gemeinsamen Luftraum 22 mit einem Heizelement 24
angeordnet ist, das ein unter Wasseraufnahme wärmeabgebendes Material
30 enthält.In summary, the following can be stated: The invention relates to an arrangement
for keeping a substrate warm, at least when heated
Releases water vapor. To make the arrangement as simple and inexpensive
to design, it is provided according to the invention that
Claims (18)
- Device for keeping a substrate (16) warm, comprising an air space (22) and a heating element (24), wherein the substrate gives off water or water vapor (20) at least in the warmed condition and is disposed in the air space (22) together with the heating element (24), wherein the heating element (24) contains a material (30) which is exothermic upon exposure to water and wherein the air space (22) is thermally insulated with respect to the environment and formed by the internal space (22) of an insulated container (10, 12) for receiving the substrate (16) and the heating element (24), characterized in that the substrate (16) to be kept warm is a consumable which gives off water in at least the warmed condition.
- Device according to Claim 1, characterized in that the substrate (16) is heated by the heating element (24) by convection or thermal conduction through the air space (22).
- Device according to Claim 1 or 2, characterized in that the heating element (24) includes a pouch (28) containing the exothermic material (30), which pouch is transmissive for air and water vapor (20).
- Device according to Claim 3, characterized in that the pouch (28) is a textile pouch.
- Device according to Claim 3 or 4, characterized in that the pouch (28) is comprised of a material temperature resistant to at least 200°C, preferably to 400°C.
- Device for keeping a consumable warm, comprising an air space (22) and a heating element (24), wherein the consumable (16) gives off water or water vapor (20) at least in the warmed condition and is disposed in the air space (22) together with the heating element (24), wherein the heating element (24) contains a material (30) which is exothermic upon exposure to water, characterized in that the exothermic material (30) is embedded in a form-stable carrier body for the consumable (16), which carrier body is comprised of a fibrous, water vapor permeable material.
- Device according to one of Claims 1 through 6, characterized in that the substrate (16) is in thermal conductive communication with the heating element (24) via a contact surface.
- Device according to one of Claims 1 through 7, characterized in that, upon adsorption, the exothermic material (30) releases a thermal energy of at least 2000 kJ per kg of taken up water.
- Device according to one of Claims 1 through 8, characterized in that the exothermic material (30) has a specific heat of less than 50 kJ/kg, preferably less than 10 kJ/kg.
- Device according to one of Claims 1 through 9, characterized in that the exothermic material (30) is porous and exhibits an average pore size of 0.2 to 4 nm.
- Device according to one of Claims 1 through 10, characterized in that the exothermic material (30) is a granulate or powder with an average particle diameter of 0.1 to 4 mm.
- Device according to one of Claims 1 through 11, characterized in that the exothermic material (30) is a zeolite.
- Device according to one of Claims 6 through 12, characterized in that the carrier body is plate-shaped and forms a base-plate for the substrate to be kept warm.
- Device according to one of Claims 6 through 13, characterized in that the carrier body is integrated in the insulated container (10, 12).
- Device according to one of Claims 1 through 14, characterized in that the insulated container (10, 12) includes a box made of folded cardboard.
- Device according to one of Claims 1 through 15, characterized in that the insulated container (10, 12) is closable vapor-tight.
- Use of the heat maintaining device according to one of Claims 1 through 16 for keeping a water vapor emitting consumable (16) in the warm and dry condition during transportation in the insulated container (10, 12).
- Use of the heat maintaining material according to one of Claims 1 through 16 for keeping pizza (16) warm and dry during transportation in an airtight insulated container (10, 12).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19936025A DE19936025A1 (en) | 1999-08-04 | 1999-08-04 | Warming arrangement |
| DE19936025 | 1999-08-04 | ||
| PCT/EP2000/007056 WO2001010278A1 (en) | 1999-08-04 | 2000-07-22 | Heat maintenance device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1199964A1 EP1199964A1 (en) | 2002-05-02 |
| EP1199964B1 true EP1199964B1 (en) | 2004-12-01 |
Family
ID=7916706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00958287A Expired - Lifetime EP1199964B1 (en) | 1999-08-04 | 2000-07-22 | Heat maintenance device |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1199964B1 (en) |
| AT (1) | ATE283657T1 (en) |
| DE (2) | DE19936025A1 (en) |
| WO (1) | WO2001010278A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10110850A1 (en) * | 2001-03-07 | 2002-09-12 | Rolf Groeger | Condensate accumulator is located in container and does not allow water to trickle back onto foodstuff, absorbing vapors so it is not necessary to lead away vapors and heat energy with it |
| EP2447624A3 (en) * | 2010-10-28 | 2012-12-05 | Vaillant GmbH | Heat pump |
| DE102012008524A1 (en) * | 2012-05-02 | 2013-11-07 | Antonio Crapanzano | Pizza transport box for transporting pizza by pizza bringing service, has lid base in which openings are formed for passage of moisture-laden warm air from accommodation space |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3339642C2 (en) * | 1983-10-31 | 1987-01-08 | Fritz Dipl.-Ing. Kaubek | Drying elements and methods for their use |
| EP0203558B1 (en) * | 1985-05-28 | 1991-10-09 | ZEO-TECH Zeolith Technologie GmbH | Apparatus for and method of water heating by an intermittent adsorption process |
| WO1989008806A1 (en) * | 1988-03-17 | 1989-09-21 | International Thermal Packaging, Inc. | Apparatus and method for simultaneously heating and cooling separate zones |
| DE4032216A1 (en) * | 1990-08-14 | 1992-02-27 | Alois Kinberger | TRANSPORT AND WARM HOLDING CONTAINERS FOR HOT PREPARED DISHES |
| DE19507768A1 (en) * | 1994-09-12 | 1996-03-14 | Electrolux Leisure Appliances | Sorption cooling unit |
| DE29508306U1 (en) * | 1995-05-19 | 1995-08-03 | Serr, Johannes, 73230 Kirchheim | Transport container for pizzas |
-
1999
- 1999-08-04 DE DE19936025A patent/DE19936025A1/en not_active Withdrawn
-
2000
- 2000-07-22 EP EP00958287A patent/EP1199964B1/en not_active Expired - Lifetime
- 2000-07-22 DE DE50008848T patent/DE50008848D1/en not_active Expired - Lifetime
- 2000-07-22 AT AT00958287T patent/ATE283657T1/en not_active IP Right Cessation
- 2000-07-22 WO PCT/EP2000/007056 patent/WO2001010278A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| EP1199964A1 (en) | 2002-05-02 |
| ATE283657T1 (en) | 2004-12-15 |
| DE50008848D1 (en) | 2005-01-05 |
| WO2001010278A1 (en) | 2001-02-15 |
| DE19936025A1 (en) | 2001-02-08 |
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