EP0949846B1 - Immersion heater for use in radiators of a heating system with hot water circulation - Google Patents

Immersion heater for use in radiators of a heating system with hot water circulation Download PDF

Info

Publication number
EP0949846B1
EP0949846B1 EP99400854A EP99400854A EP0949846B1 EP 0949846 B1 EP0949846 B1 EP 0949846B1 EP 99400854 A EP99400854 A EP 99400854A EP 99400854 A EP99400854 A EP 99400854A EP 0949846 B1 EP0949846 B1 EP 0949846B1
Authority
EP
European Patent Office
Prior art keywords
cartridge
sleeve
collector
heating
tube
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.)
Expired - Lifetime
Application number
EP99400854A
Other languages
German (de)
French (fr)
Other versions
EP0949846A1 (en
Inventor
Michel Seba
Nirong Chuop Leak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zehnder Group Participacions SAS
Original Assignee
ZT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZT filed Critical ZT
Publication of EP0949846A1 publication Critical patent/EP0949846A1/en
Application granted granted Critical
Publication of EP0949846B1 publication Critical patent/EP0949846B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • H05B3/78—Heating arrangements specially adapted for immersion heating
    • H05B3/82—Fixedly-mounted immersion heaters
    • 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
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material

Definitions

  • the present invention relates to an immersion heater device that can be used in particular in a heating radiator with water circulation.
  • An immersion heater device comprising a collector sealed at both ends and containing a heat-transfer liquid to be heated and, housed in the collector while immersed in the heat-transfer liquid, a heated electric resistance heating cartridge embedded in the cartridge while being electrically insulated therefrom.
  • the heating cartridge comprises a cylindrical tubular metal body, for example steel, in which is compacted magnesia isolating the electrical resistance of the tube of the cartridge.
  • this known device has the major disadvantage of not ensuring perfect security from the point of view of electrical insulation because the internal electrical resistance of the heating cartridge can accidentally come into contact with the inner wall of the metal tube of the cartridge, for example to because of a crumbling of the magnesia due to a lack of compaction of the latter or a crack of the tube of the cartridge through which the heat transfer fluid can penetrate to break up the compacted magnesia, so that the short-lived current Circuit arriving to the metal collector can cause electrical shock to the user when the device is incorporated in a metal heating radiator water circulation.
  • this double insulated heating cartridge provides the desired degree of safety, it is very expensive to achieve since it requires not only the two concentric tubes internal and external, but also to compact magnesia in the inner tube to drown the electrical resistance and between the two inner and outer tubes to isolate them from each other.
  • the object of the present invention is to eliminate the drawbacks of the above-known devices by proposing a device forming an immersion heater comprising a collector in the form of a tube sealed at both ends and containing a heat-transfer liquid to be heated and housed in the collector bathed in the heat transfer liquid, an inner heater heating cartridge internally embedded in the cartridge being electrically insulated therefrom and which is characterized in that the coolant liquid is electrically insulating.
  • the heat-transfer liquid is mineral oil, preferably of the paraffinic type with a high viscosity index.
  • the heating cartridge is fixed in the manifold substantially coaxially with the latter by being carried at one of its ends by a support sleeve fixed through one of the end walls of the manifold.
  • the support sleeve of the cartridge is made of insulating material and comprises an externally threaded cylindrical portion engaging in a corresponding threaded hole in the end wall of the collector and a flange abutting against the outer face of the wall. end in the locking position of the sleeve in the end wall.
  • the support sleeve of the cartridge is made of metallic material and comprises an externally threaded cylindrical portion engaging in a corresponding threaded hole of another sleeve of insulating material also forming a nut for fixing the sleeve to the wall.
  • metal end of the manifold and a flange abutting against the other sleeve in the locking position of the sleeve in the other sleeve.
  • the heating cartridge is attached to the support sleeve by welding or gluing.
  • the heating cartridge comprises a cylindrical tube containing compacted magnesia in which the electric heating resistor is embedded, the two ends of which are respectively connected to two supply conductor wires passing through the support sleeve projecting from outside thereof .
  • the heating cartridge comprises one or more rings of electrically insulating material force-fitted on the tube of the cartridge.
  • the free end of the cartridge is covered with a cap of electrically insulating material.
  • the tube of the heating cartridge and the collector are metallic, for example steel.
  • the tube of the heating cartridge is made of an electrically insulating material, for example ceramic.
  • the immersion heater device will be described in the application to a circulating water heating radiator in which it is integrated to heat the circulating water, but it is understood that it can be used for other different applications. requiring heating a liquid or fluid.
  • the immersion heater device comprises a collector 1 in the form of a cylindrical metal tube sealed at both ends and containing a heat-transfer liquid to be heated 2.
  • the device further comprises, housed in the collector 1 by bathing in the coolant 2, a heating cartridge 3 for heating the heat transfer liquid 2 and constituted by a cylindrical metal tube 4 in which there is an internal heating electric resistance 5 embedded in compacted magnesia M in the tube 4 in order to electrically isolate the resistor 5 of the tube 4.
  • the resistor 5 is formed a spirally wound conductive wire with contiguous turns and has substantially the shape of an elongated U so that these two free ends coming out of the tube 4 are respectively connected to two external supply conductor wires 6.
  • the heat transfer liquid 2 is electrically insulating and is preferably constituted by mineral oil, preferably of the paraffinic type with a high viscosity index.
  • the mineral oil is that of SHELL sold under the name "SHELLFLEX" type 110 FC.
  • the heating cartridge 3 is fixed in the collector 1 substantially coaxially with the latter having one of its floating free ends and its opposite end secured to a support sleeve 7 made of an electrically insulating material fixed through one 1.
  • the support sleeve 7 comprises a cylindrical portion 7a externally threaded to engage in a corresponding threaded hole 1b through the end wall 1a of the collector 1 and a flange portion 7b bearing on the outer face of the end wall la when the support sleeve 7 is screwed into the wall la.
  • the support sleeve 7 further comprises a cylindrical end 7c in which the corresponding end of the heating cartridge 3 is secured by welding or gluing.
  • the supply wires 6 connected to the two ends of the heating resistor 5 through an internal bore of the support sleeve 7 to protrude outside the collector 1.
  • the heating cartridge 3 comprises one or more rings 8, in this case two in number, made of an electrically insulating material and fixed on the tube 4 of the cartridge 3 by being force-fitted thereon at a distant distance. one of the other. If necessary, the free end of the heating cartridge 3 may be covered with a cap (not shown) of electrically insulating material.
  • the rings 8 and this cap prevent accidental electrical contact between the tube 4 and the manifold 1.
  • the rings 8 and the cap are made of a material also to withstand the operating temperatures of the heating cartridge 3 .
  • the invention described above thus makes it possible to produce an immersion heater consisting of a heating cartridge known per se as described at the beginning of the description and having extremely high electrical insulation characteristics ensuring, thanks to the heat transfer liquid, a very high degree. safety of users, especially when the immersion heater is used in a heating radiator water circulation.
  • the support sleeve 7, instead of being made of an electrically insulating material may be made of metal material coated with insulating material.
  • FIG. 3 shows the sleeve 7 made of metallic material of identical structure to that of the sleeve 7 of FIG. 1 and whose externally threaded cylindrical portion 7a is engaged in a corresponding threaded hole 9a of another sleeve 9 made of electrically insulating material also forming nut for fixing the metal sleeve 7 to the metal end wall 1a of the collector 1.
  • the tube 4 of the heating cartridge 3, instead of being metallic may be made of electrically insulating material, such as for example ceramics.

Abstract

The immersion heater has a heating cartridge (3), formed with a sleeve (4) housing and an electric resistance element (5) fixed inside an external collector (1) that contains a heat transfer fluid (2). This fluid has good electrical insulation properties, and is usually a mineral oil.

Description

La présente invention concerne un dispositif formant thermoplongeur pouvant être utilisé notamment dans un radiateur de chauffage à circulation d'eau.The present invention relates to an immersion heater device that can be used in particular in a heating radiator with water circulation.

On connaît un dispositif formant thermoplongeur comprenant un collecteur fermé de façon étanche à ses deux extrémités et contenant un liquide caloporteur à chauffer et, logée dans le collecteur en baignant dans le liquide caloporteur, une cartouche chauffante à résistance électrique chauffante noyée dans la cartouche en étant isolée électriquement de celle-ci. Plus précisément, la cartouche chauffante comprend un corps tubulaire cylindrique métallique, par exemple en acier, dans lequel est compactée de la magnésie isolant la résistance électrique du tube de la cartouche.An immersion heater device is known comprising a collector sealed at both ends and containing a heat-transfer liquid to be heated and, housed in the collector while immersed in the heat-transfer liquid, a heated electric resistance heating cartridge embedded in the cartridge while being electrically insulated therefrom. More specifically, the heating cartridge comprises a cylindrical tubular metal body, for example steel, in which is compacted magnesia isolating the electrical resistance of the tube of the cartridge.

Cependant, ce dispositif connu a pour inconvénient majeur de ne pas assurer une sécurité parfaite du point de vue isolation électrique car la résistance électrique interne de la cartouche chauffante peut accidentellement venir en contact avec la paroi interne du tube métallique de la cartouche, par exemple à cause d'un effritement de la magnésie dû à un défaut de compactage de celle-ci ou d'une fissure du tube de la cartouche à travers laquelle peut pénétrer le fluide caloporteur pour désagréger la magnésie compactée, de sorte que le courant de court-circuit arrivant jusqu'au collecteur métallique peut provoquer des décharges électriques à l'usager lorsque le dispositif est intégré dans un radiateur de chauffage métallique à circulation d'eau.However, this known device has the major disadvantage of not ensuring perfect security from the point of view of electrical insulation because the internal electrical resistance of the heating cartridge can accidentally come into contact with the inner wall of the metal tube of the cartridge, for example to because of a crumbling of the magnesia due to a lack of compaction of the latter or a crack of the tube of the cartridge through which the heat transfer fluid can penetrate to break up the compacted magnesia, so that the short-lived current Circuit arriving to the metal collector can cause electrical shock to the user when the device is incorporated in a metal heating radiator water circulation.

Pour améliorer le degré de sécurité d'un tel dispositif thermoplongeur, on a proposé de réaliser la cartouche chauffante en deux tubes métalliques cylindriques concentriques, isolés électriquement l'un de l'autre par de la magnésie compactée, le tube interne comportant la résistance électrique de chauffage noyée dans de la magnésie compactée pour l'isoler du tube interne. Un tel dispositif est connu par exemple du document EP-A-0317435 .To improve the degree of safety of such an immersion heater device, it has been proposed to produce the heating cartridge in two concentric cylindrical metal tubes, electrically insulated from each other by compacted magnesia, the inner tube comprising the electrical resistance of heating embedded in compacted magnesia to isolate it from the inner tube. Such a device is known for example from document EP-A-0317435 .

Cependant, si cette cartouche chauffante à double isolation assure le degré souhaité de sécurité, elle est très coûteuse à réaliser puisqu'elle nécessite non seulement les deux tubes concentriques interne et externe, mais également de compacter de la magnésie dans le tube interne pour noyer la résistance électrique et entre les deux tubes interne et externe pour les isoler l'un de l'autre.However, if this double insulated heating cartridge provides the desired degree of safety, it is very expensive to achieve since it requires not only the two concentric tubes internal and external, but also to compact magnesia in the inner tube to drown the electrical resistance and between the two inner and outer tubes to isolate them from each other.

La présente invention a pour but d'éliminer les inconvénients des dispositifs ci-dessus connus en proposant un dispositif formant thermoplongeur comprenant un collecteur en forme de tube fermé de façon étanche à ses deux extrémités et contenant un liquide caloporteur à chauffer et, logée dans le collecteur en baignant dans le liquide caloporteur, une cartouche chauffante à résistance électrique interne chauffante interne noyée dans la cartouche en étant isolée électriquement de celle-ci et qui est caractérisé en ce que le liquide caloporteur est électriquement isolant.The object of the present invention is to eliminate the drawbacks of the above-known devices by proposing a device forming an immersion heater comprising a collector in the form of a tube sealed at both ends and containing a heat-transfer liquid to be heated and housed in the collector bathed in the heat transfer liquid, an inner heater heating cartridge internally embedded in the cartridge being electrically insulated therefrom and which is characterized in that the coolant liquid is electrically insulating.

Le liquide caloporteur est de l'huile minérale, de préférence du type paraffinique à haut indice de viscosité.The heat-transfer liquid is mineral oil, preferably of the paraffinic type with a high viscosity index.

La cartouche chauffante est fixée dans le collecteur sensiblement coaxialement à celui-ci en étant portée à l'une de ses extrémités par un manchon de support fixé à travers l'une des parois d'extrémité du collecteur.The heating cartridge is fixed in the manifold substantially coaxially with the latter by being carried at one of its ends by a support sleeve fixed through one of the end walls of the manifold.

Avantageusement, le manchon de support de la cartouche est en matériau isolant et comprend une partie cylindrique filetée extérieurement s'engageant dans un trou taraudé correspondant de la paroi d'extrémité du collecteur et une collerette venant en appui sur la face externe de la paroi d'extrémité en position de blocage du manchon dans la paroi d'extrémité.Advantageously, the support sleeve of the cartridge is made of insulating material and comprises an externally threaded cylindrical portion engaging in a corresponding threaded hole in the end wall of the collector and a flange abutting against the outer face of the wall. end in the locking position of the sleeve in the end wall.

Selon une variante de réalisation, le manchon de support de la cartouche est en matériau métallique et comprend une partie cylindrique filetée extérieurement s'engageant dans un trou taraudé correspondant d'un autre manchon en matériau isolant formant également écrou de fixation du manchon à la paroi d'extrémité métallique du collecteur et une collerette venant en appui sur l'autre manchon en position de blocage du manchon dans l'autre manchon.According to an alternative embodiment, the support sleeve of the cartridge is made of metallic material and comprises an externally threaded cylindrical portion engaging in a corresponding threaded hole of another sleeve of insulating material also forming a nut for fixing the sleeve to the wall. metal end of the manifold and a flange abutting against the other sleeve in the locking position of the sleeve in the other sleeve.

De préférence, la cartouche chauffante est fixée au manchon de support par soudage ou par collage.Preferably, the heating cartridge is attached to the support sleeve by welding or gluing.

La cartouche chauffante comprend un tube cylindrique contenant de la magnésie compactée dans laquelle est noyée la résistance électrique chauffante dont les deux extrémités sont reliées respectivement à deux fils conducteurs d'alimentation traversant le manchon de support en faisant saillie à l'extérieur de celui-ci.The heating cartridge comprises a cylindrical tube containing compacted magnesia in which the electric heating resistor is embedded, the two ends of which are respectively connected to two supply conductor wires passing through the support sleeve projecting from outside thereof .

La cartouche chauffante comprend une ou plusieurs bagues en matériau électriquement isolant emmanchée à force sur le tube de la cartouche.The heating cartridge comprises one or more rings of electrically insulating material force-fitted on the tube of the cartridge.

L'extrémité libre de la cartouche est recouverte d'un capuchon en matériau électriquement isolant.The free end of the cartridge is covered with a cap of electrically insulating material.

Le tube de la cartouche chauffante et le collecteur sont métalliques, par exemple en acier.The tube of the heating cartridge and the collector are metallic, for example steel.

Selon une variante, le tube de la cartouche chauffante est en un matériau électriquement isolant, par exemple en céramique.According to a variant, the tube of the heating cartridge is made of an electrically insulating material, for example ceramic.

L'invention sera mieux comprise et d'autres buts, caractéristiques, détails et avantages de celle-ci apparaîtront plus clairement au cours de la description explicative qui va suivre faite en référence aux dessins schématiques annexés donnés uniquement à titre d'exemple illustrant un mode de réalisation de l'invention et dans lesquels :

  • La figure 1 est une vue en coupe longitudinale du dispositif formant thermoplongeur de l'invention.
  • La figure 2 est une vue en coupe suivant la ligne II-II de la figure 1.
  • La figure 3 est une vue en coupe longitudinale d'une variante de réalisation du dispositif de l'invention.
The invention will be better understood and other objects, characteristics, details and advantages thereof will appear more clearly in the following explanatory description made with reference to the accompanying diagrammatic drawings given solely by way of example illustrating a preferred embodiment of the invention. embodiments of the invention and in which:
  • Figure 1 is a longitudinal sectional view of the immersion heater device of the invention.
  • Figure 2 is a sectional view along the line II-II of Figure 1.
  • Figure 3 is a longitudinal sectional view of an alternative embodiment of the device of the invention.

Le dispositif formant thermoplongeur va être décrit dans l'application à un radiateur de chauffage à circulation d'eau dans lequel il est intégré pour chauffer l'eau circulant, mais il est bien entendu qu'il peut être utilisé pour d'autres applications différentes nécessitant le chauffage d'un liquide ou d'un fluide.The immersion heater device will be described in the application to a circulating water heating radiator in which it is integrated to heat the circulating water, but it is understood that it can be used for other different applications. requiring heating a liquid or fluid.

En se reportant aux figures 1 et 2, le dispositif formant thermoplongeur comprend un collecteur 1 en forme de tube cylindrique métallique fermé de façon étanche à ses deux extrémités et contenant un liquide caloporteur à chauffer 2.With reference to FIGS. 1 and 2, the immersion heater device comprises a collector 1 in the form of a cylindrical metal tube sealed at both ends and containing a heat-transfer liquid to be heated 2.

Le dispositif comprend en outre, logé dans le collecteur 1 en baignant dans le liquide caloporteur 2, une cartouche chauffante 3 permettant de chauffer le liquide caloporteur 2 et constituée par un tube cylindrique métallique 4 dans lequel se trouve une résistance électrique interne chauffante 5 noyée dans de la magnésie M compactée dans le tube 4 afin d'isoler électriquement la résistance 5 du tube 4. La résistance 5 est constituée d'un fil conducteur enroulé en spirale à spires jointives et a sensiblement la forme d'un U allongé de façon que ces deux extrémités libres sortant du tube 4 soient reliées respectivement à deux fils conducteurs externes d'alimentation 6.The device further comprises, housed in the collector 1 by bathing in the coolant 2, a heating cartridge 3 for heating the heat transfer liquid 2 and constituted by a cylindrical metal tube 4 in which there is an internal heating electric resistance 5 embedded in compacted magnesia M in the tube 4 in order to electrically isolate the resistor 5 of the tube 4. the resistor 5 is formed a spirally wound conductive wire with contiguous turns and has substantially the shape of an elongated U so that these two free ends coming out of the tube 4 are respectively connected to two external supply conductor wires 6.

Selon l'invention, le liquide caloporteur 2 est électriquement isolant et est de préférence constitué par de l'huile minérale, de préférence du type paraffinique à haut indice de viscosité. A titre d'exemple, l'huile minérale est celle de la Société SHELL commercialisée sous la dénomination « SHELLFLEX » type 110 FC.According to the invention, the heat transfer liquid 2 is electrically insulating and is preferably constituted by mineral oil, preferably of the paraffinic type with a high viscosity index. By way of example, the mineral oil is that of SHELL sold under the name "SHELLFLEX" type 110 FC.

La cartouche chauffante 3 est fixée dans le collecteur 1 sensiblement coaxialement à celui-ci en ayant l'une de ses extrémités libre flottante et son extrémité opposée solidaire d'un manchon de support 7 réalisé en un matériau électriquement isolant fixé à travers l'une la des parcis d'extrémité du collecteur 1. Comme représenté en figure 1, le manchon de support 7 comprend une partie cylindrique 7a filetée extérieurement pour s'engager dans un trou taraudé correspondant 1b traversant la paroi d'extrémité 1a du collecteur 1 et une partie formant collerette 7b venant en appui sur la face externe de la paroi d'extrémité la lorsque le manchon de support 7 est bloqué par vissage dans la paroi la. Le manchon de support 7 comprend en outre une extrémité cylindrique 7c dans laquelle est solidarisée, par soudage ou par collage, l'extrémité correspondante de la cartouche chauffante 3. Les fils d'alimentation 6 reliés aux deux extrémités de la résistance chauffante 5 traversent un percage interne du manchon de support 7 pour faire saillie à l'extérieur du collecteur 1.The heating cartridge 3 is fixed in the collector 1 substantially coaxially with the latter having one of its floating free ends and its opposite end secured to a support sleeve 7 made of an electrically insulating material fixed through one 1. As shown in Figure 1, the support sleeve 7 comprises a cylindrical portion 7a externally threaded to engage in a corresponding threaded hole 1b through the end wall 1a of the collector 1 and a flange portion 7b bearing on the outer face of the end wall la when the support sleeve 7 is screwed into the wall la. The support sleeve 7 further comprises a cylindrical end 7c in which the corresponding end of the heating cartridge 3 is secured by welding or gluing. The supply wires 6 connected to the two ends of the heating resistor 5 through an internal bore of the support sleeve 7 to protrude outside the collector 1.

La cartouche chauffante 3 comprend une ou plusieurs bagues 8, dans le cas présent au nombre de deux, réalisées en un matériau électriquement isolant et fixées sur le tube 4 de la cartouche 3 en étant emmanchées à force sur celui-ci à une distance éloignée l'une de l'autre. Le cas échéant, l'extrémité libre de la cartouche chauffante 3 peut être recouverte d'un capuchon (non représenté) en matériau électriquement isolant. Les bagues 8 et ce capuchon permettent d'éviter un contact électrique accidentel entre le tube 4 et le collecteur 1. Bien entendu, les bagues 8 et le capuchon sont réalisés en une matière permettant également de résister aux températures de fonctionnement de la cartouche chauffante 3.The heating cartridge 3 comprises one or more rings 8, in this case two in number, made of an electrically insulating material and fixed on the tube 4 of the cartridge 3 by being force-fitted thereon at a distant distance. one of the other. If necessary, the free end of the heating cartridge 3 may be covered with a cap (not shown) of electrically insulating material. The rings 8 and this cap prevent accidental electrical contact between the tube 4 and the manifold 1. Of course, the rings 8 and the cap are made of a material also to withstand the operating temperatures of the heating cartridge 3 .

L'invention ci-dessus décrite permet ainsi de réaliser un thermoplongeur constitué par une cartouche chauffante connue en soi comme décrit au début de la description et présentant des caractéristiques d'isolation électrique extrêmement élevées assurant, grâce au liquide caloporteur isolant, un degré très élevé de sécurité d'usagers, notamment lorsque le thermoplongeur est utilisé dans un radiateur de chauffage à circulation d'eau.The invention described above thus makes it possible to produce an immersion heater consisting of a heating cartridge known per se as described at the beginning of the description and having extremely high electrical insulation characteristics ensuring, thanks to the heat transfer liquid, a very high degree. safety of users, especially when the immersion heater is used in a heating radiator water circulation.

Diverses modifications peuvent être apportées au dispositif thermoplongeur sans sortir du cadre de la présente invention. Ainsi, le manchon de support 7, au lieu d'être réalisé en un matériau électriquement isolant peut être réalisé en matériau métallique revêtu de matière isolante. La figure 3 représente le manchon 7 en matériau métallique de structure identique à celle du manchon 7 de la figure 1 et dont la partie cylindrique filetée extérieurement 7a est engagée dans un trou taraudé correspondant 9a d'un autre manchon 9 en matériau électriquement isolant formant également écrou de fixation du manchon métallique 7 à la paroi d'extrémité métallique la du collecteur 1. Selon une autre variante de réalisation, le tube 4 de la cartouche chauffante 3, au lieu d'être métallique, peut être réalisé en matériau électriquement isolant, tel que par exemple de la céramique.Various modifications may be made to the immersion heater device without departing from the scope of the present invention. Thus, the support sleeve 7, instead of being made of an electrically insulating material may be made of metal material coated with insulating material. FIG. 3 shows the sleeve 7 made of metallic material of identical structure to that of the sleeve 7 of FIG. 1 and whose externally threaded cylindrical portion 7a is engaged in a corresponding threaded hole 9a of another sleeve 9 made of electrically insulating material also forming nut for fixing the metal sleeve 7 to the metal end wall 1a of the collector 1. According to another variant embodiment, the tube 4 of the heating cartridge 3, instead of being metallic, may be made of electrically insulating material, such as for example ceramics.

Claims (12)

  1. Device forming an immersion heater including a collector (1) in the form of a tube sealed at both its extremities and containing a heat transfer fluid for heating (2) and, housed within the collector (1) and immersed in the heat transfer fluid (2), a heating cartridge (3) with an internal electric heating resistor (5) embedded in the cartridge (3) being insulated electrically from the latter, characterised in that the heat transfer fluid (2) is electrically insulating.
  2. Device according to claim 1, characterised in that the heat transfer fluid (2) is mineral oil, preferably a paraffin-type mineral oil with a high viscosity index.
  3. Device according to claim 1 or claim 2, characterised in that the heating cartridge (3) is fixed inside the collector (1) approximately coaxially with the latter and being supported at one of its extremities by a support sleeve (7) fixed through one (1a) of the extremity walls of the collector (1).
  4. Device according to claim 3, characterised in that the support sleeve (7) of the cartridge (3) is of an electrically insulating material and includes an externally-threaded cylindrical part (7a) fitting into a corresponding tapped hole (1b) in the extremity wall (1a) of the collector (1) and a flange (7b) resting against the external face of the extremity wall (1a) when the sleeve (7) is in the position in which it is locked into the extremity wall (1a).
  5. Device according to claim 3, characterised in that support sleeve (7) of the cartridge (3) is of a metal material and includes an externally-threaded cylindrical part (7a) fitting into a corresponding tapped hole (9a) of another sleeve (9) of insulating material also forming a screw for fixing the sleeve (7) to the metallic extremity wall (1a) of the collector (1) and a flange (7b) resting against the other sleeve (9) when the sleeve (7) is in the position in which it is locked into the other sleeve (9).
  6. Device according to any one of claims 3 to 5, characterised in that the heating cartridge (3) is fixed to the support sleeve (7) by soldering or by glueing.
  7. Device according to any one of claims 3 to 6, characterised in that the heating cartridge (3) includes a cylindrical tube (4) containing compacted magnesium in which is embedded the electric heating resistor (5) whose two extremities are connected respectively to two power supply wires (6) passing through the support sleeve (7) and projecting outside the latter.
  8. Device according to claim 7, characterised in that the heating cartridge (3) includes one or more rings (8) of an electrically insulating material force-fitted onto the tube (4) of the cartridge (3).
  9. Device according to claim 7 or claim 8, characterised in that the free extremity of the heating cartridge (3) is covered by a cap of an electrically insulating material.
  10. Device according to any one of claims 7 to 9, characterised in that the tube (4) of the heating cartridge (3) and the collector (1) are of metal, for example of steel.
  11. Device according to any one of claims 7 to 9, characterised in that the tube (4) of the heating cartridge (3) is of an electrically insulating material, for example of ceramic material.
  12. Use of the immersion heater device as specified in claims 1 to 11 in a radiator of a water circulation heating system.
EP99400854A 1998-04-09 1999-04-08 Immersion heater for use in radiators of a heating system with hot water circulation Expired - Lifetime EP0949846B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9804485A FR2777410B1 (en) 1998-04-09 1998-04-09 THERMOPLONGER FORMING DEVICE THAT CAN BE USED IN PARTICULAR IN A WATER CIRCULATION HEATER
FR9804485 1998-04-09

Publications (2)

Publication Number Publication Date
EP0949846A1 EP0949846A1 (en) 1999-10-13
EP0949846B1 true EP0949846B1 (en) 2007-08-15

Family

ID=9525088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99400854A Expired - Lifetime EP0949846B1 (en) 1998-04-09 1999-04-08 Immersion heater for use in radiators of a heating system with hot water circulation

Country Status (5)

Country Link
EP (1) EP0949846B1 (en)
AT (1) ATE370635T1 (en)
DE (1) DE69936816T2 (en)
ES (1) ES2292226T3 (en)
FR (1) FR2777410B1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2809276B1 (en) * 2000-05-17 2002-07-19 Acova THERMOPLONGER FORMING DEVICE THAT CAN BE USED IN PARTICULAR IN A WATER CIRCULATION HEATER
WO2002101303A1 (en) * 2001-06-08 2002-12-19 Corona Lopez Romulo Water heater based on a thermoelectric device using silicon oil
GB2407479B (en) * 2003-10-29 2006-06-28 Martin Lister The hardy kettle
DE102007061837B3 (en) * 2007-12-20 2009-01-29 Robert Bosch Gmbh Immersible heating unit for use in e.g. dishwasher, has multi-function protection unit that prevents scaling and corrosion of heating element, and is geometrically modified in relation to heating element
CN102353147A (en) * 2011-09-09 2012-02-15 罗晴海 Heat exchange device for electric water heater
DE102011057017A1 (en) * 2011-12-23 2013-06-27 Dbk David + Baader Gmbh Heating assembly for heating e.g. ammonia in ammonia storage and delivery system for diesel engine of lorry, has coupling layer arranged in circumference gap between sleeve wall and cartridge wall for thermal and/or mechanical coupling
CN104075367A (en) * 2013-03-30 2014-10-01 昆山友进智能建筑工程有限公司 Energy-saving electrical oil heater
GB201407560D0 (en) * 2014-04-30 2014-06-11 Yorkshire Electric Radiators Ltd Improvements to radiator apparatuses

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000084A1 (en) * 1983-06-17 1985-01-03 Hideaki Ito Electric heater and heat exchanger employing the same
FR2623357A1 (en) * 1987-11-12 1989-05-19 Ego France Double-walled immersion heater
FR2623685A1 (en) * 1987-11-19 1989-05-26 Andre David ELECTRIC HEATING ELEMENT WITH A GLASS TUBE AND A SAFETY DEVICE DETECTING THE FAILURE OF THE SAME
GB9012535D0 (en) * 1990-06-05 1990-07-25 Townsend David W Coated heating element

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE69936816T2 (en) 2008-05-08
ES2292226T3 (en) 2008-03-01
DE69936816D1 (en) 2007-09-27
ATE370635T1 (en) 2007-09-15
FR2777410A1 (en) 1999-10-15
EP0949846A1 (en) 1999-10-13
FR2777410B1 (en) 2002-06-28

Similar Documents

Publication Publication Date Title
US4388523A (en) Electrical heating cable connector
EP0949846B1 (en) Immersion heater for use in radiators of a heating system with hot water circulation
US11118810B2 (en) Heat transfer assembly
FR2810399A1 (en) TEMPERATURE MEASURING DEVICE FOR FLUID FLOWING IN A TUBE
EP1278400B1 (en) Heating element
EP0554375A1 (en) Self-regulating connecting device containing fusible material
FR2781051A1 (en) TEMPERATURE SENSOR FOR COOKING PLATE OF A COOKING FIREPLACE
US3741816A (en) Thermocouple structures
FR2580451A1 (en) Heating resistor.
WO2003023291A3 (en) Electrical water heating device with large contact surface
EP0536018B1 (en) Wall electrode for metallurgical electric direct current furnace
EP0771889B1 (en) Device for cathodically protecting a water heater and water heater featuring such a device
FR2624588A1 (en) Device for electrically heating a heat-transfer liquid in a radiator
FR3118675A1 (en) Electrical assembly for transporting electrical energy subject to high temperature
EP1156704B1 (en) Immersion heating device that could be used particularly in a water circulating heating radiator
FR3007828A1 (en) HEATING ELEMENT AND WATER HEATER HAVING SUCH A HEATING ELEMENT
FR2801469A1 (en) Electric heating cartridge with heating conductor wound on coil body surrounded by insulation esp. of magnesium oxide and arranged concentrically with this in metal casing
FR2741227A1 (en) Long life electrode esp. for glass melting furnace
FR2470370A1 (en) Temp. measuring sensor for engine cooling liquid - comprises temp. sensitive thin film resistance deposited on plate and protected by layer of polymer material
EP1037311B1 (en) Sealing device of a connection of a flat braid
JPH08167468A (en) Heating device
FR2681496A1 (en) Shielded heating elements with electrical supply and method of manufacture of such elements
FR2796120A1 (en) Heater element for escaping gas from crankcase of internal combustion engine has shoulder for securing clamp and has ceramic valve seat with profiled section
US1412735A (en) Electric heating device
FR3133949A1 (en) Electrical connector

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20000413

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ZEHNDER GROUP SERVICES

18D Application deemed to be withdrawn

Effective date: 20060228

18RA Request filed for re-establishment of rights before grant

Effective date: 20060718

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

18RR Decision to grant the request for re-establishment of rights before grant

Free format text: ANGENOMMEN

Effective date: 20070222

D18D Application deemed to be withdrawn (deleted)
GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ZT

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REF Corresponds to:

Ref document number: 69936816

Country of ref document: DE

Date of ref document: 20070927

Kind code of ref document: P

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: TROESCH SCHEIDEGGER WERNER AG

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20071120

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: ZEHNDER GROUP PARTICIPATIONS

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070815

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2292226

Country of ref document: ES

Kind code of ref document: T3

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: ZEHNDER GROUP PARTICIPATIONS

Effective date: 20071226

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071116

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070815

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20080115

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070815

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20071115

26N No opposition filed

Effective date: 20080516

NLS Nl: assignments of ep-patents

Owner name: ZEHNDER GROUP PARTICIPATIONS

Effective date: 20080709

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070815

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: ZEHNDER GROUP PARTICIPATIONS

Free format text: ZT#7 RUE JEAN MERMOZ ZA SAINT-GUENAULT#91031 COURCOURONNES (FR) -TRANSFER TO- ZEHNDER GROUP PARTICIPATIONS#ZA SAINT-GUENAULT 7, RUE JEAN MERMOZ COURCOURONNES#91031 EVRY CEDEX (FR)

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080430

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 69936816

Country of ref document: DE

Representative=s name: RECHTS- UND PATENTANWAELTE LORENZ SEIDLER GOSS, DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20120830 AND 20120905

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 69936816

Country of ref document: DE

Representative=s name: LORENZ SEIDLER GOSSEL RECHTSANWAELTE PATENTANW, DE

Effective date: 20120817

Ref country code: DE

Ref legal event code: R082

Ref document number: 69936816

Country of ref document: DE

Representative=s name: RECHTS- UND PATENTANWAELTE LORENZ SEIDLER GOSS, DE

Effective date: 20120817

Ref country code: DE

Ref legal event code: R081

Ref document number: 69936816

Country of ref document: DE

Owner name: ZEHNDER GROUP PARTICIPATIONS, COURCOURONNES, FR

Free format text: FORMER OWNER: ZT, COURCOURONNES, FR

Effective date: 20120817

Ref country code: DE

Ref legal event code: R081

Ref document number: 69936816

Country of ref document: DE

Owner name: ZEHNDER GROUP PARTICIPATIONS, FR

Free format text: FORMER OWNER: ZT, COURCOURONNES, FR

Effective date: 20120817

REG Reference to a national code

Ref country code: AT

Ref legal event code: PC

Ref document number: 370635

Country of ref document: AT

Kind code of ref document: T

Owner name: ZEHNDER GROUP PARTICIPATIONS, FR

Effective date: 20130409

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20170419

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20170410

Year of fee payment: 19

Ref country code: DE

Payment date: 20170419

Year of fee payment: 19

Ref country code: GB

Payment date: 20170419

Year of fee payment: 19

Ref country code: CH

Payment date: 20170419

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20170419

Year of fee payment: 19

Ref country code: AT

Payment date: 20170420

Year of fee payment: 19

Ref country code: BE

Payment date: 20170419

Year of fee payment: 19

Ref country code: ES

Payment date: 20170517

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69936816

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: NL

Ref legal event code: MM

Effective date: 20180501

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 370635

Country of ref document: AT

Kind code of ref document: T

Effective date: 20180408

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20180430

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20180408

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180408

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180501

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20181101

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180408

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180430

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180408

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180430

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20190911

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180409