EP1517585A1 - Heating plate - Google Patents

Heating plate Download PDF

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Publication number
EP1517585A1
EP1517585A1 EP03405678A EP03405678A EP1517585A1 EP 1517585 A1 EP1517585 A1 EP 1517585A1 EP 03405678 A EP03405678 A EP 03405678A EP 03405678 A EP03405678 A EP 03405678A EP 1517585 A1 EP1517585 A1 EP 1517585A1
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EP
European Patent Office
Prior art keywords
cavities
heating plate
heat transfer
transfer medium
heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03405678A
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German (de)
French (fr)
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EP1517585B8 (en
EP1517585B1 (en
Inventor
Patrick Hofer-Noser
Jürg Zahnd
Christoph Boos
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3S Swiss Solar Systems AG
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Swiss Sustainable Systems AG
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Filing date
Publication date
Application filed by Swiss Sustainable Systems AG filed Critical Swiss Sustainable Systems AG
Priority to EP03405678A priority Critical patent/EP1517585B8/en
Priority to DE50302334T priority patent/DE50302334D1/en
Priority to ES03405678T priority patent/ES2258709T3/en
Priority to AT03405678T priority patent/ATE317208T1/en
Priority to US10/940,449 priority patent/US7637308B2/en
Publication of EP1517585A1 publication Critical patent/EP1517585A1/en
Application granted granted Critical
Publication of EP1517585B1 publication Critical patent/EP1517585B1/en
Publication of EP1517585B8 publication Critical patent/EP1517585B8/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates

Definitions

  • the invention relates to a heating plate with cavities, in which electrically heated radiator and a heat transfer medium for transmission the heat emitted by the radiators to the plate is arranged wherein the cavities with connection means for the purpose of flow with the Heat transfer medium are equipped.
  • Such heating plates are in particular in laminators for Production of photovoltaic modules or others for the production of Used with hot-melt adhesives or thermoplastic materials associated plates. In such applications, a uniform temperature over the whole surface of the heating plate very important, since already small temperature differences can lead to faulty products.
  • a first type of known heating panels has built-in electrical Heating rods, which release the heat by heat conduction to the plate.
  • the distribution of the temperature along the heating elements is not controllable.
  • the heating elements must as closely as possible in appropriate Fit holes in the plate to ensure good heat transfer is. However, this can lead to tensions due to thermal expansion. If the heating plate and the heating elements are made of different materials, In addition, contact corrosion can occur. Will improve the heat transfer Thermal paste used, they can dry up over time, which in turn causes temperature differences across the surface of the heating plate can arise.
  • a heat transfer medium for example oil
  • the heat transfer medium cools during the Flow through the cavities, which is already too undesirable Temperature differences on the surface of the heating plate leads.
  • the invention is the The object of the invention is to propose a heating plate through which the mentioned The disadvantages of the prior art heating plates be overcome.
  • the Cavities stretched long and the radiators are rod-shaped.
  • long stretched should be understood in this context that the ratio between the light width and the length of the cavities is at least one to ten.
  • This inventive solution allows the use of relatively long heating rods, for example, a length of one to six meters can have, wherein the diameter ratio between cavity and Heating element can be chosen so that you with a minimum of heat transfer medium gets along. This will especially during heating and Cooling achieves short reaction times of the entire system.
  • the difference between inlet and outlet temperature according to the nature of the invention is very low, since heat source and heat sink are in the same place, and by a sufficiently rapidly flowing heat transfer medium along the temperature of the heating element is compensated.
  • the Cavities a circular cross-section. This allows their production by drilling.
  • the cavities can also be used by Tube elements are formed.
  • the radiators can with spacers be provided, which is a direct contact of the inner walls of the cavities prevent by the radiators.
  • the radiators can also have a do not have round cross-section and be twisted, creating a turbulent Flow of the heat transfer medium is favored.
  • the Cavities arranged parallel to each other because thereby a uniform Temperature distribution on the surface of the heating plate particularly simple can achieve.
  • a uniform temperature distribution can also be characterized be favored that the cavities through the connection means in one Series circuit or connected in parallel.
  • the cavities through the connection means so be joined together in at least two groups of cavities the cavities are connected together in a series circuit and that the groups of cavities in a parallel connection with each other are connected.
  • the heat transfer medium in a cycle or be circulated through the cavities of the heating plate in an open system are various Process conceivable.
  • the heat transfer medium for faster heating additionally before entering the heating plate heated.
  • the Flow rate and the flow rate of the heat transfer medium is controlled so that it warmer during a steady warm-up out of the plate as it flowed into the plate.
  • the inventive Heating plate can also be cooled by a cool heat transfer fluid is passed through the cavities. This can either be done by happen that the heat transfer medium via an external heat exchanger is cooled, or that another, cool heat transfer medium is passed through the cavities.
  • FIG. 1 shows schematically in a perspective view of FIG front a section through a heating plate 1, made of a metal, for example an aluminum alloy can exist.
  • a heating plate 1 made of a metal, for example an aluminum alloy can exist.
  • the heating plate 1 are long elongated cavities 2 arranged, for example, produced by drilling could be.
  • heating rods 3 are arranged coaxially, such that between them and the inner walls of the cavities an annular gap 8 is formed, which is intended to flow through a heat transfer medium to become.
  • FIGS. 3a and 3b show schematically how such connection means 9 and 10 can look in the plan view.
  • the heat transfer medium is denoted by 7 and is by a pump 4 in Promoted circulation. In place of the pump is also another pressure booster conceivable.
  • FIG. 3a shows different types, as the individual Cavities can be connected fluidly with each other.
  • the cavities 2 arranged parallel to one another are two connected by arcuate connecting parts 9 so that they from Heat transfer medium in succession, so to be flowed through in series.
  • FIG. 3b shows an arrangement in which the mutually parallel cavities 2 are summarized by connecting parts 10 so that they are from the heat transfer medium to be flowed through in parallel.
  • FIG. 3c shows an arrangement, in which groups of cavities 2 are connected in series, the Groups are connected in parallel to each other.

Landscapes

  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Baking, Grill, Roasting (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Surface Heating Bodies (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Resistance Heating (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

The metal plate (1), preferably aluminum, has bores (8), preferably in parallel arrangement, in which heating rods (3) are concentrically supported as a heat transfer medium is pumped through the hollow spaces (2).

Description

Die Erfindung betrifft eine Heizplatte mit Hohlräumen, in denen elektrisch beheizbare Heizkörper und ein Wärmeträgermedium zur Übertragung der von den Heizkörpern an die Platte abgegebenen Wärme angeordnet sind, wobei die Hohlräume mit Anschlussmitteln zwecks Durchströmung mit dem Wärmeträgermedium ausgestattet sind.The invention relates to a heating plate with cavities, in which electrically heated radiator and a heat transfer medium for transmission the heat emitted by the radiators to the plate is arranged wherein the cavities with connection means for the purpose of flow with the Heat transfer medium are equipped.

Solche Heizplatten werden insbesondere in Laminiergeräten zur Herstellung von photovoltaischen Modulen oder anderen zur Herstellung von mit Heissklebern oder thermoplasten Materialien verbundenen Platten eingesetzt. Bei derartigen Anwendungen ist eine gleichmässige Temperatur über die ganze Fläche der Heizplatte sehr wichtig, da bereits kleine Temperaturdifferenzen zu fehlerhaften Produkten führen können.Such heating plates are in particular in laminators for Production of photovoltaic modules or others for the production of Used with hot-melt adhesives or thermoplastic materials associated plates. In such applications, a uniform temperature over the whole surface of the heating plate very important, since already small temperature differences can lead to faulty products.

Ein erster Typ von bekannten Heizplatten weist eingebaute elektrische Heizstäbe auf, welche die Wärme durch Wärmeleitung an die Platte abgeben. Dabei ist die Verteilung der Temperatur entlang der Heizstäbe nicht kontrollierbar. Ferner müssen die Heizstäbe möglichst genau in entsprechende Öffnungen der Platte passen, damit ein guter Wärmeübergang gewährleistet ist. Dies kann aber zu Spannungen infolge der Wärmedehnung führen. Wenn die Heizplatte und die Heizstäbe aus unterschiedlichen Materialien bestehen, kann zudem Kontaktkorrosion auftreten. Werden zur Verbesserung des Wärmeübergangs Wärmeleitpasten eingesetzt, können diese mit der Zeit vertrocknen, wodurch wiederum Temperaturdifferenzen über die Fläche der Heizplatte entstehen können.A first type of known heating panels has built-in electrical Heating rods, which release the heat by heat conduction to the plate. The distribution of the temperature along the heating elements is not controllable. Furthermore, the heating elements must as closely as possible in appropriate Fit holes in the plate to ensure good heat transfer is. However, this can lead to tensions due to thermal expansion. If the heating plate and the heating elements are made of different materials, In addition, contact corrosion can occur. Will improve the heat transfer Thermal paste used, they can dry up over time, which in turn causes temperature differences across the surface of the heating plate can arise.

Bei einem zweiten Typen von bekannten Heizplatten sind Hohlräume vorgesehen, die von einem Wärmeträgermedium, beispielsweise Öl, durchströmt werden, wobei das Wärmeträgermedium ausserhalb der Heizplatte erwärmt wird. Dabei kühlt sich natürlich das Wärmeträgermedium während des Durchflusses durch die Hohlräume ab, was allein schon zu unerwünschten Temperaturdifferenzen auf der Oberfläche der Heizplatte führt. In a second type of known heating plates are cavities provided by a heat transfer medium, for example oil, be flowed through, wherein the heat transfer medium outside the heating plate is heated. Of course, the heat transfer medium cools during the Flow through the cavities, which is already too undesirable Temperature differences on the surface of the heating plate leads.

Aus dem deutschen Gebrauchsmuster DE 296 10 952 U1 ist eine Heizplatte bekannt, bei der elektrische Heizelemente in Hohlräumen der Heizplatte angeordnet sind, wobei die Hohlräume ein zirkulierendes Wärmeträgermedium enthalten. Da bei dieser Heizplatte die Hohlräume durch Stützwände mit Durchbrechungen für das Wärmeträgermedium unterteilt sind, sind diese Hohlräume verhältnismässig gross und es wird entsprechend viel Wärmeträgermedium benötigt. Die Durchbrechungen verursachen unerwünschte Strömungsverluste, die zu einem hohen Druckabfall führen. Auf Grund der Durchbrechungen ist die Strömung in den Hohlräumen schlecht kontrollierbar, es können Bereiche entstehen, in denen das Wärmeträgermedium praktisch nicht strömt. Dies kann zu lokaler Abkühlung, oder aber im Bereich der Heizelemente zu lokaler Überhitzung des Wärmeträgermediums führen, wodurch wiederum unerwünschte Temperaturdifferenzen auf der Oberfläche der Heizplatte entstehen. Wenn als Wärmeträgermedium Öl verwendet wird, kann dieses bei Überhitzung an den Heizelementen "anbacken" und so die Wärmeübertragung behindern.From the German utility model DE 296 10 952 U1 is a Heating plate known in the electrical heating elements in cavities of the heating plate are arranged, wherein the cavities a circulating heat transfer medium contain. As with this heating plate, the cavities through retaining walls are divided with openings for the heat transfer medium, these are Cavities relatively large and it is correspondingly much heat transfer medium needed. The openings cause unwanted flow losses, which lead to a high pressure drop. Due to the breakthroughs the flow in the cavities is poorly controllable, it can arise areas in which the heat transfer medium practically not flows. This can be for local cooling, or in the area of heating elements lead to local overheating of the heat transfer medium, which in turn undesirable temperature differences on the surface of the heating plate arise. If oil is used as the heat transfer medium, this can be at Overheating on the heating elements "caking" and thus the heat transfer hinder.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine Heizplatte vorzuschlagen, durch welche die erwähnten, den Heizplatten nach dem Stand der Technik anhaftenden Nachteile überwunden werden. Insbesondere ist es ein Ziel der Erfindung, eine Heizplatte vorzuschlagen, welche mit einem verhältnismässig kleinen Volumen von Wärmeträgermedium auskommt und bei der die Strömungsverhältnisse des Wärmeträgermediums günstiger sind, als bei Heizplatten nach dem Stand der Technik.Based on this prior art, the invention is the The object of the invention is to propose a heating plate through which the mentioned The disadvantages of the prior art heating plates be overcome. In particular, it is an object of the invention to provide a hot plate to propose, which with a comparatively small volume of Carries heat transfer medium and in the flow conditions of the Heat transfer medium are cheaper than in hot plates according to the state of Technology.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass die Hohlräume lang gestreckt und die Heizkörper stabförmig sind. Unter "lang gestreckt" soll in diesem Zusammenhang verstanden werden, dass das Verhältnis zwischen lichter Weite und Länge der Hohlräume mindestens eins zu zehn beträgt.This object is achieved according to the invention that the Cavities stretched long and the radiators are rod-shaped. Under "long stretched" should be understood in this context that the ratio between the light width and the length of the cavities is at least one to ten.

Diese erfindungsgemässe Lösung erlaubt den Einsatz von relativ langen Heizstäben, die beispielsweise eine Länge von einem bis sechs Metern haben können, wobei das Durchmesserverhältnis zwischen Hohlraum und Heizstab so gewählt werden kann, dass man mit einem Minimum an Wärmeträgermedium auskommt. Dadurch werden insbesondere beim Aufheizen und Abkühlen kurze Reaktionszeiten des Gesamtsystems erreicht. Die Differenz zwischen Ein- und Austrittstemperatur ist der Natur der Erfindung gemäss sehr gering, da Wärmequelle und Wärmesenke am gleichen Ort sind, und durch ein ausreichend rasch strömendes Wärmeträgermedium die Temperatur entlang des Heizstabes ausgeglichen wird.This inventive solution allows the use of relatively long heating rods, for example, a length of one to six meters can have, wherein the diameter ratio between cavity and Heating element can be chosen so that you with a minimum of heat transfer medium gets along. This will especially during heating and Cooling achieves short reaction times of the entire system. The difference between inlet and outlet temperature according to the nature of the invention is very low, since heat source and heat sink are in the same place, and by a sufficiently rapidly flowing heat transfer medium along the temperature of the heating element is compensated.

Nach einer besonderen Ausführungsart der Erfindung haben die Hohlräume einen kreisrunden Querschnitt. Dies erlaubt deren Herstellung durch Bohren. Selbstverständlich können die Hohlräume auch durch eingesetzte Rohr-Elemente gebildet werden. Die Heizkörper können mit Abstandshaltern versehen sein, die eine direkte Berührung der Innenwände der Hohlräume durch die Heizkörper verhindern. Die Heizkörper können auch einen nicht runden Querschnitt haben und verdrillt sein, wodurch eine turbulente Strömung des Wärmeträgermediums begünstigt wird. Vorzugsweise sind die Hohlräume parallel zueinander angeordnet, weil sich dadurch eine gleichmässige Temperaturverteilung auf der Oberfläche der Heizplatte besonders einfach erreichen lässt. Eine gleichmässige Temperaturverteilung kann auch dadurch begünstigt werden, dass die Hohlräume durch die Anschlussmittel in einer Serieschaltung oder in einer Parallelschaltung miteinander verbunden sind. In gewissen Fällen, beispielsweise bei sehr grossen zu beheizenden Flächen, kann es vorteilhaft sein, wenn eine Serie- und Parallelschaltung der Hohlräume kombiniert wird. Dabei können die Hohlräume durch die Anschlussmittel so miteinander verbunden werden, dass in mindestens zwei Gruppen von Hohlräumen die Hohlräume miteinander in einer Serieschaltung verbunden sind und dass die Gruppen von Hohlräumen in einer Parallelschaltung miteinander verbunden sind.According to a particular embodiment of the invention, the Cavities a circular cross-section. This allows their production by drilling. Of course, the cavities can also be used by Tube elements are formed. The radiators can with spacers be provided, which is a direct contact of the inner walls of the cavities prevent by the radiators. The radiators can also have a do not have round cross-section and be twisted, creating a turbulent Flow of the heat transfer medium is favored. Preferably, the Cavities arranged parallel to each other, because thereby a uniform Temperature distribution on the surface of the heating plate particularly simple can achieve. A uniform temperature distribution can also be characterized be favored that the cavities through the connection means in one Series circuit or connected in parallel. In certain cases, for example in the case of very large areas to be heated, It may be advantageous if a series and parallel circuit of the cavities combined. In this case, the cavities through the connection means so be joined together in at least two groups of cavities the cavities are connected together in a series circuit and that the groups of cavities in a parallel connection with each other are connected.

Zum Betrieb der erfindungsgemässen Heizplatte sind verschiedene Verfahren denkbar. So kann das Wärmeträgermedium in einem Kreislauf oder in einem offenen System durch die Hohlräume der Heizplatte zirkuliert werden. Nach einer besonderen Ausführungsart des Verfahrens wird das Wärmeträgermedium zur rascheren Aufheizung zusätzlich vor dem Eintritt in die Heizplatte erwärmt. Damit bereits in der Aufheizphase auf der Oberfläche der Heizplatte eine gleichmässige Temperatur erreicht wird, ist es vorteilhaft, wenn die Durchflussmenge und die Durchflussgeschwindigkeit des Wärmeträgermediums so gesteuert wird, dass es während einer stetigen Aufheizphase wärmer aus der Platte herausströmt, als es in die Platte geflossen ist. Die erfindungsgemässe Heizplatte kann auch abgekühlt werden, indem eine kühle Wärmeträgerflüssigkeit durch die Hohlräume geleitet wird. Dies kann entweder dadurch geschehen, dass das Wärmeträgermedium über einen externen Wärmetauscher gekühlt wird, oder dass ein anderes, kühles Wärmeträgermedium durch die Hohlräume geleitet wird.For the operation of the inventive heating plate are various Process conceivable. Thus, the heat transfer medium in a cycle or be circulated through the cavities of the heating plate in an open system. According to a particular embodiment of the method, the heat transfer medium for faster heating additionally before entering the heating plate heated. Thus already in the heating phase on the surface of the heating plate a uniform temperature is reached, it is advantageous if the Flow rate and the flow rate of the heat transfer medium is controlled so that it warmer during a steady warm-up out of the plate as it flowed into the plate. The inventive Heating plate can also be cooled by a cool heat transfer fluid is passed through the cavities. This can either be done by happen that the heat transfer medium via an external heat exchanger is cooled, or that another, cool heat transfer medium is passed through the cavities.

Besondere Ausführungsarten der Erfindung werden nachstehend unter Bezugnahme auf die beiliegenden Zeichnungen beispielsweise näher erläutert. Es zeigt

Figur 1
eine schematische, perspektivische, aufgeschnittene Ansicht eines Ausführungsbeispiels der erfindungsgemässen Heizplatte,
Figur 2
einen schematischen Schnitt durch das Ausführungsbeispiel gemäss Figur 1 und
Figuren 3a bis 3c
drei Varianten der Strömungsführung durch die erfindungsgemässe Heizplatte.
Particular embodiments of the invention will be explained in more detail below with reference to the accompanying drawings, for example. It shows
FIG. 1
a schematic, perspective, cutaway view of an embodiment of the inventive hot plate,
FIG. 2
a schematic section through the embodiment according to Figure 1 and
FIGS. 3a to 3c
three variants of the flow guidance by the inventive heating plate.

Die Figur 1 zeigt schematisch in einer perspektivischen Ansicht von vorne einen Schnitt durch eine Heizplatte 1, die aus einem Metall, beispielsweise einer Aluminiumlegierung bestehen kann. In der Heizplatte 1 sind lang gestreckte Hohlräume 2 angeordnet, die beispielsweise durch Bohren hergestellt sein können. In den Hohlräumen 2 sind Heizstäbe 3 koaxial angeordnet, derart, dass zwischen ihnen und den Innenwänden der Hohlräume ein Ringspalt 8 entsteht, der dazu bestimmt ist, von einem Wärmeträgermedium durchströmt zu werden. In einem realisierten Ausführungsbeispiel beträgt der Durchmesser der Hohlräume 2 cm und deren Länge 3,6 Meter.FIG. 1 shows schematically in a perspective view of FIG front a section through a heating plate 1, made of a metal, for example an aluminum alloy can exist. In the heating plate 1 are long elongated cavities 2 arranged, for example, produced by drilling could be. In the cavities 2 heating rods 3 are arranged coaxially, such that between them and the inner walls of the cavities an annular gap 8 is formed, which is intended to flow through a heat transfer medium to become. In a realized embodiment, the Diameter of the cavities 2 cm and their length 3.6 meters.

Figur 2 zeigt schematisch die Anordnung der Heizstäbe 3 in der Heizplatte 1 und die Führung des Wärmeträgermediums innerhalb und ausserhalb der Heizplatte 1. Der Eintritt und der Austritt für das Wärmeträgermedium sind mit 5 bezeichnet. Für die dichte Führung des Wärmeträgermediums sind bekannte Anschlussmittel vorgesehen, die auf mindestens einer Seite der Heizplatte den dichten Durchtritt eines Heizstabes 3 oder einer elektrischen Zuleitung für diesen gestatten. In den Figuren 3a und 3b ist schematisch gezeigt, wie solche Anschlussmittel 9 und 10 in der Draufsicht aussehen können. Das Wärmeträgermedium ist mit 7 bezeichnet und wird durch eine Pumpe 4 im Kreislauf gefördert. An Stelle der Pumpe ist auch ein anderes Druckerhöhungsmittel denkbar. Abstandhalter 6, die am Heizstab 3 verteilt über dessen Aussenumfang vorgesehen sind, sorgen dafür, dass der Heizstab die Innenwand des Hohlraumes 2 nicht direkt berührt. Anstatt der Abstandshalter oder zusätzlich zu diesen können die Heizstäbe 3 einen nicht runden Querschnitt aufweisen und verdrillt sein, um eine turbulente Strömung im Wärmeträgermedium und damit einen guten Wärmeübergang zu bewirken.Figure 2 shows schematically the arrangement of the heating elements 3 in the Heating plate 1 and the leadership of the heat transfer medium inside and outside the heating plate 1. The inlet and outlet for the heat transfer medium are designated 5. For the tight guidance of the heat transfer medium known connection means provided on at least one side of the Hot plate the tight passage of a heating element 3 or an electric Allow supply for this. FIGS. 3a and 3b show schematically how such connection means 9 and 10 can look in the plan view. The heat transfer medium is denoted by 7 and is by a pump 4 in Promoted circulation. In place of the pump is also another pressure booster conceivable. Spacer 6, which is distributed on the heating element 3 via the Outside circumference are provided, ensure that the heating element, the inner wall of the cavity 2 is not touched directly. Instead of the spacers or In addition to these, the heating rods 3 may have a non-round cross-section have and be twisted to a turbulent flow in the heat transfer medium and thus to effect a good heat transfer.

Die Figuren 3a, 3b und 3c zeigen verschiedene Arten, wie die einzelnen Hohlräume strömungsmässig miteinander verbunden werden können. Gemäss Figur 3a sind die parallel zueinander angeordneten Hohlräume 2 durch bogenförmige Anschlussteile 9 so miteinander verbunden, dass sie vom Wärmeträgermedium nacheinander, also in Serie durchströmt werden. Figur 3b zeigt eine Anordnung, bei der die parallel zueinander angeordneten Hohlräume 2 durch Anschlussteile 10 so zusammengefasst sind, dass sie vom Wärmeträgermedium parallel durchströmt werden. In Figur 3c ist eine Anordnung dargestellt, bei der Gruppen von Hohlräumen 2 in Serie geschaltet sind, wobei die Gruppen zueinander parallel geschaltet sind.Figures 3a, 3b and 3c show different types, as the individual Cavities can be connected fluidly with each other. According to FIG. 3 a, the cavities 2 arranged parallel to one another are two connected by arcuate connecting parts 9 so that they from Heat transfer medium in succession, so to be flowed through in series. FIG. 3b shows an arrangement in which the mutually parallel cavities 2 are summarized by connecting parts 10 so that they are from the heat transfer medium to be flowed through in parallel. FIG. 3c shows an arrangement, in which groups of cavities 2 are connected in series, the Groups are connected in parallel to each other.

Claims (12)

Heizplatte (1) mit Hohlräumen (2), in denen elektrisch beheizbare Heizkörper (3) und ein Wärmeträgermedium zur Übertragung der von den Heizkörpern an die Platte abgegebenen Wärme angeordnet sind, wobei die Hohlräume (2) mit Anschlussmitteln (9, 10) zwecks Durchströmung mit dem Wärmeträgermedium ausgestattet sind, dadurch gekennzeichnet, dass die Hohlräume (2) lang gestreckt und die Heizkörper (3) stabförmig sind.Heating plate (1) with cavities (2), in which electrically heatable radiator (3) and a heat transfer medium for transferring the heat emitted from the radiators to the plate heat are arranged, wherein the cavities (2) with connection means (9, 10) for the purpose of flow equipped with the heat transfer medium, characterized in that the cavities (2) stretched long and the radiator (3) are rod-shaped. Heizplatte nach Anspruch 1, dadurch gekennzeichnet, dass die Hohlräume (2) einen kreisrunden Querschnitt haben.Heating plate according to claim 1, characterized in that the cavities (2) have a circular cross-section. Heizplatte nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass die Heizkörper mit Abstandshaltern (6) versehen sind, die eine direkte Berührung der Innenwände der Hohlräume durch die Heizkörper (3) verhindern.Heating plate according to one of claims 1 to 2, characterized in that the radiators are provided with spacers (6) which prevent direct contact of the inner walls of the cavities by the radiator (3). Heizplatte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Heizkörper (3) einen nicht runden Querschnitt haben und verdrillt sind.Heating plate according to one of the preceding claims, characterized in that the heating elements (3) have a non-round cross-section and are twisted. Heizplatte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Hohlräume (2) parallel zueinander angeordnet sind.Heating plate according to one of the preceding claims, characterized in that the cavities (2) are arranged parallel to each other. Heizplatte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Hohlräume (2) durch die Anschlussmittel (9) in einer Serieschaltung miteinander verbunden sind.Heating plate according to one of the preceding claims, characterized in that the cavities (2) are interconnected by the connecting means (9) in a series connection. Heizplatte nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Hohlräume (2) durch die Anschlussmittel (10) in einer Parallelschaltung miteinander verbunden sind.Heating plate according to one of claims 1 to 5, characterized in that the cavities (2) by the connecting means (10) are connected in a parallel connection with each other. Heizplatte nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Hohlräume (2) durch die Anschlussmittel (9, 10) so miteinander verbunden sind, dass in mindestens zwei Gruppen von Hohlräumen die Hohlräume miteinander in einer Serieschaltung verbunden sind und dass die Gruppen von Hohlräumen in einer Parallelschaltung miteinander verbunden sind.Heating plate according to one of claims 1 to 5, characterized in that the cavities (2) by the connecting means (9, 10) are interconnected so that in at least two groups of cavities, the cavities are connected to each other in a series connection and that the groups are interconnected by cavities in a parallel circuit. Verfahren zum Betrieb der Heizplatte nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Wärmeträgermedium in einem Kreislauf durch die Hohlräume der Heizplatte zirkuliert wird.Method for operating the heating plate according to one of claims 1 to 8, characterized in that the heat transfer medium is circulated in a cycle through the cavities of the heating plate. Verfahren zum Betrieb der Heizplatte nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Wärmeträgermedium in einem offenen System durch die Hohlräume der Heizplatte geführt wird.Method for operating the heating plate according to one of claims 1 to 8, characterized in that the heat transfer medium is guided in an open system through the cavities of the heating plate. Verfahren nach einem der Ansprüche 9 bis 10, dadurch gekennzeichnet, dass das Wärmeträgermedium zur rascheren Aufheizung zusätzlich vor dem Eintritt in die Heizplatte erwärmt wird.Method according to one of claims 9 to 10, characterized in that the heat transfer medium for rapid heating is additionally heated prior to entry into the heating plate. Verfahren nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass die Durchflussmenge und die Durchflussgeschwindigkeit des Wärmeträgermediums so gesteuert wird, dass es während einer stetigen Aufheizphase wärmer aus der Platte herausströmt, als es in die Platte geflossen ist.Method according to one of claims 9 to 11, characterized in that the flow rate and the flow rate of the heat transfer medium is controlled so that it flows out of the plate during a continuous heating phase warmer than it has flowed into the plate.
EP03405678A 2003-09-16 2003-09-16 Heating plate Expired - Lifetime EP1517585B8 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP03405678A EP1517585B8 (en) 2003-09-16 2003-09-16 Heating plate
DE50302334T DE50302334D1 (en) 2003-09-16 2003-09-16 heating plate
ES03405678T ES2258709T3 (en) 2003-09-16 2003-09-16 HEATING PLATE.
AT03405678T ATE317208T1 (en) 2003-09-16 2003-09-16 HEATING PLATE
US10/940,449 US7637308B2 (en) 2003-09-16 2004-09-14 Heating plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03405678A EP1517585B8 (en) 2003-09-16 2003-09-16 Heating plate

Publications (3)

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EP1517585A1 true EP1517585A1 (en) 2005-03-23
EP1517585B1 EP1517585B1 (en) 2006-02-01
EP1517585B8 EP1517585B8 (en) 2006-05-03

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ID=34178681

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EP03405678A Expired - Lifetime EP1517585B8 (en) 2003-09-16 2003-09-16 Heating plate

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US (1) US7637308B2 (en)
EP (1) EP1517585B8 (en)
AT (1) ATE317208T1 (en)
DE (1) DE50302334D1 (en)
ES (1) ES2258709T3 (en)

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EP2239789A1 (en) 2009-04-08 2010-10-13 SAPHIRE ApS Laminating assembly
US8575524B2 (en) 2008-04-04 2013-11-05 Komax Holding Ag Heating plate for workpieces
DE202014102979U1 (en) * 2014-06-30 2015-07-01 Michael Jäger fryer

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US20060138119A1 (en) * 2004-12-27 2006-06-29 Taylor Curtis P Warming device and methods for warming an article
US20060138120A1 (en) * 2004-12-27 2006-06-29 Taylor Curtis P Warming device and methods for warming an article
US8260126B2 (en) * 2009-12-17 2012-09-04 Lord Ltd., Lp Dual wall axial flow electric heater for leak sensitive applications
DE102012217875A1 (en) * 2012-09-28 2014-04-03 Behr Gmbh & Co. Kg Heat exchanger

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US8575524B2 (en) 2008-04-04 2013-11-05 Komax Holding Ag Heating plate for workpieces
EP2239789A1 (en) 2009-04-08 2010-10-13 SAPHIRE ApS Laminating assembly
WO2010115930A1 (en) 2009-04-08 2010-10-14 Saphire Aps Laminating assembly
US8790951B2 (en) 2009-04-08 2014-07-29 Saphire Solar Technologies Aps Laminating assembly
DE202014102979U1 (en) * 2014-06-30 2015-07-01 Michael Jäger fryer

Also Published As

Publication number Publication date
DE50302334D1 (en) 2006-04-13
EP1517585B8 (en) 2006-05-03
EP1517585B1 (en) 2006-02-01
US7637308B2 (en) 2009-12-29
US20050121435A1 (en) 2005-06-09
ATE317208T1 (en) 2006-02-15
ES2258709T3 (en) 2006-09-01

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