EP0526778B1 - Electric heating element for infrared heating device and its manufacturing method - Google Patents

Electric heating element for infrared heating device and its manufacturing method Download PDF

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Publication number
EP0526778B1
EP0526778B1 EP92112072A EP92112072A EP0526778B1 EP 0526778 B1 EP0526778 B1 EP 0526778B1 EP 92112072 A EP92112072 A EP 92112072A EP 92112072 A EP92112072 A EP 92112072A EP 0526778 B1 EP0526778 B1 EP 0526778B1
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EP
European Patent Office
Prior art keywords
housing
resistant wire
wire
heating element
wiring conductor
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
EP92112072A
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German (de)
French (fr)
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EP0526778A2 (en
EP0526778A3 (en
Inventor
Bernard Marcel Moulinex Bois
Guy Moulinex Collas
Michel Jean Claude Cauvin
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Moulinex SA
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Moulinex SA
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Publication date
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Publication of EP0526778A2 publication Critical patent/EP0526778A2/en
Publication of EP0526778A3 publication Critical patent/EP0526778A3/en
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Publication of EP0526778B1 publication Critical patent/EP0526778B1/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
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • H05B3/08—Heater elements structurally combined with coupling elements or holders having electric connections specially adapted for high temperatures
    • 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
    • H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material

Definitions

  • the invention relates to an electric heating element intended to be mounted in an infrared heating apparatus and comprising, in a silicon glass tube known as a quartz tube, a wound wire forming a resistance known as a resistant wire each end of which passes through an insulating sleeve and is connected by means of electrical connection to a wiring wire capable of withstanding high temperatures, and a blocking means of which allows the resistant wire to be maintained between the two sleeves.
  • the electrical connection means are constituted by crimped lugs which have the function, on the one hand, of making the electrical connection between the resistant wire and the wiring wire, and, on the other hand , to block the resistant wire in the tube by bending a tab of each terminal against the corresponding insulating sleeve.
  • the pods have the drawback of being very fragile, the tabs break under the pressure of the resistant wire, or else let the wire escape.
  • direct welding of the resistant wire onto the wiring wire makes the resistant wire brittle and does not, for example, allow it to be worked or deformed to produce the blocking means.
  • Document DE-A-2 709 345 discloses a device and a method, where the terminal is probed in the resistant wire.
  • the invention aims to remedy these drawbacks and in particular to provide a heating element whose connection means are reliable and economical, as well as a method of manufacturing such an element.
  • connection means comprises a housing formed at the end of the wiring wire and into which the resistant wire is inserted, and a means for stopping the resistant wire in said housing, while the blocking means consists of a fold of each end of the resistant wire formed outside the corresponding sleeve.
  • connection between the two wires can be automated, which allows mass production and a low cost price.
  • the means for stopping the resistant wire in its housing consists of an intimate connection between the wall of the housing and said wire obtained by crushing and electrical welding on said wall.
  • Figure 1 is a partial sectional view of an element heater illustrating part of the connection means according to the invention
  • Figure 2 is a detailed sectional view of a housing of the connection means made in the form of a slot
  • Figure 3 is a detailed sectional view of a variant of a housing formed as a tube
  • Figure 4 is a view of the heating element when finished.
  • the electric heating element as shown in Figures 1 and 4 is intended to be mounted in an infrared heating device such as, for example, an oven, a grill, a toaster ...
  • This element comprises, in a silicon glass tube said quartz tube 1, a wire wound in nickel chromium 2 forming a resistance said resistance wire, each end 3, 4 of which passes through an insulating sleeve 5, 6 of soapstone and is connected by means of an electrical connection to a wire of wiring 7, 8 in mild steel or stainless steel and able to withstand high temperatures.
  • each connection means comprises a housing 9, 10 formed at the end of the wiring wire 7, 8 and in which the resistant wire 2 is inserted.
  • Each housing 9, 10 is constituted, for example, by a hole made in the axis and at the end of the wiring wire.
  • Each connection means further comprises a means for stopping the resistant wire 2 in said housing 9, 10 which is constituted by an intimate connection between the wall 11, 11 'of the housing 9, 10 and said wire 2 obtained by crushing and welding electric on said wall.
  • a spot welding is carried out on the outer wall 11, 11 'of the housing 9, 10 so that the welding tool 12 (shown in broken lines in Figure 1) is not in direct contact with the wire resistant 2.
  • a "forging" of said wall 11, 11 ′ is carried out so as to pinch the resistant wire 2 by crushing the latter (see FIG. 4).
  • the invention provides for a blocking means which allows the maintenance of the resistant wire 2 between the two sleeves 5, 6 and the good cohesion of the resistant wire assembly 2 - sleeves 5, 6 - quartz tube 1 once assembled.
  • Said means consists of a fold 13, 14 of each end 3, 4 of the resistant wire 2 formed outside the corresponding sleeve 5, 6 and obtained by bending. The mechanical effort generated by this bending is possible thanks to the good quality of the connection between the resistant wire 2 and the wiring wire 7.8, a connection which does not weaken the resistant wire.
  • Each insulating sleeve 5, 6 comprises, at the level of the external outlet 15, a transverse groove 16 so as to prevent the rotation of the end 3, 4 of said wire 2 after bending.
  • the housing 9 is constituted by a slot arranged in an axial plane and formed at the end of the wiring wire 7.
  • the wiring wire 7 is a tube with an inner diameter greater than that of the resistant wire 2, and the housing 9 is formed by the end hole of the tube.
  • the method of manufacturing a heating element according to the invention is particularly simple and consists in carrying out the following operations: the resistant wire 2 is wound, the two ends 3, 4 are stretched, the first end 3 is passed through of a first insulating sleeve 5, said end 3 is introduced into the housing 9 of a first wiring wire 7, it is welded to the outer wall 11 of the housing 9 without the soldering tool 12 touching the resistant wire 2 so as to pinch said wire, we bend said end 3 of the resistant wire 2 so as to form a fold 13, then we introduce the second end 4 of the resistant wire 2 into the housing 10 of a second wiring wire 8, we weld as previously on the wall 11 ′ of the housing 10, the resistant wire assembly is threaded 2 and second wiring wire 8 in the quartz tube 1 then the tube 1 is closed by the second insulating sleeve 6, the second end 4 of the resistant wire 2 is then arched so as to form a fold 14 and to immobilize the tube assembly 1 - sleeves 5, 6 - resistant wire 2. Finally, the two wiring wires 7, 8 are connected to

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  • Resistance Heating (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

The invention relates to a heating element comprising, in a quartz tube (1), a coiled wire forming a resistor (2), each end (3, 4) of which passes through an insulating sleeve (5, 6) and is connected by virtue of a means of electrical connection to a lead (7, 8), and in which a securing means enables the resistive wire to be held between the two sleeves. According to the invention, the means of connection includes a housing (9, 10) made at the end of the lead and into which is inserted the resistive wire, and a means of immobilising the resistive wire in the said housing, whilst the securing means consists of a bend (13, 14) of each end of the resistive wire, made outside the corresponding sleeve. Application to infrared heating appliances such as ovens. <IMAGE>

Description

L'invention se rapporte à un élément chauffant électrique destiné à être monté dans un appareil de chauffage par infrarouge et comprenant, dans un tube de verre au silicium dit tube quartz, un fil bobiné formant résistance dit fil résistant dont chaque extrémité traverse un manchon isolant et est reliée grâce à un moyen de connexion électrique à un fil de câblage apte à supporter des hautes températures, et dont un moyen de blocage permet le maintien du fil résistant entre les deux manchons.The invention relates to an electric heating element intended to be mounted in an infrared heating apparatus and comprising, in a silicon glass tube known as a quartz tube, a wound wire forming a resistance known as a resistant wire each end of which passes through an insulating sleeve and is connected by means of electrical connection to a wiring wire capable of withstanding high temperatures, and a blocking means of which allows the resistant wire to be maintained between the two sleeves.

Dans les dispositifs connus de ce genre, les moyens de connexion électrique sont constitués par des cosses serties qui ont pour fonction, d'une part, de réaliser la connexion électrique entre le fil résistant et le fil de câblage, et, d'autre part, de bloquer le fil résistant dans le tube par cambrage d'une patte de chaque cosse contre le manchon isolant correspondant. Or les cosses présentant l'inconvénient d'être très fragiles, les pattes cassent sous la pression du fil résistant, ou bien laissent échapper ledit fil. Par ailleurs, il est connu qu'une soudure directe du fil résistant sur le fil de câblage rend le fil résistant cassant et ne permet pas, par exemple, de le travailler ou le déformer pour réaliser le moyen de blocage.In known devices of this kind, the electrical connection means are constituted by crimped lugs which have the function, on the one hand, of making the electrical connection between the resistant wire and the wiring wire, and, on the other hand , to block the resistant wire in the tube by bending a tab of each terminal against the corresponding insulating sleeve. However, the pods have the drawback of being very fragile, the tabs break under the pressure of the resistant wire, or else let the wire escape. Furthermore, it is known that direct welding of the resistant wire onto the wiring wire makes the resistant wire brittle and does not, for example, allow it to be worked or deformed to produce the blocking means.

Le document DE-A-2 709 345 divulgue un dispositif et un procédé, où la cosse est sondée dans le fil résistant.Document DE-A-2 709 345 discloses a device and a method, where the terminal is probed in the resistant wire.

L'invention a pour but de remédier à ces inconvénients et en particulier de fournir un élément chauffant dont les moyens de connexion sont fiables et économiques, ainsi qu'un procédé de fabrication d'un tel élément.The invention aims to remedy these drawbacks and in particular to provide a heating element whose connection means are reliable and economical, as well as a method of manufacturing such an element.

Selon l'invention, le moyen de connexion comporte un logement pratiqué au bout du fil de câblage et dans lequel est inséré le fil résistant, et un moyen d'arrêt du fil résistant dans ledit logement, tandis que le moyen de blocage est constitué par un pli de chaque extrémité du fil résistant pratiqué hors du manchon correspondant.According to the invention, the connection means comprises a housing formed at the end of the wiring wire and into which the resistant wire is inserted, and a means for stopping the resistant wire in said housing, while the blocking means consists of a fold of each end of the resistant wire formed outside the corresponding sleeve.

Ainsi, grâce à l'encastrement du fil résistant dans le fil de câblage, on réalise une connexion fiable et durable qui est de plus économique car on évite l'utilisation d'une cosse, diminuant le nombre de pièces et d'opérations d'assemblage. De plus , la liaison entre les deux fils peut être automatisée, ce qui permet une fabrication en grande série et un prix de revient faible.Thus, thanks to the embedding of the resistant wire in the wiring wire, a reliable and durable connection is made which is more economical because it avoids the use of a terminal, reducing the number of parts and operations of assembly. In addition, the connection between the two wires can be automated, which allows mass production and a low cost price.

Selon une autre caractéristique avantageuse de l'invention, le moyen d'arrêt du fil résistant dans son logement est constitué par une liaison intime entre la paroi du logement et ledit fil obtenue par écrasement et soudure électrique sur ladite paroi.According to another advantageous characteristic of the invention, the means for stopping the resistant wire in its housing consists of an intimate connection between the wall of the housing and said wire obtained by crushing and electrical welding on said wall.

Ainsi, l'opération de soudure étant effectuée sur la paroi extérieure du logement et le fil résistant étant simplement pincé, tout contact direct entre l'outil de soudure et le fil résistant est empêché et ainsi on évite la fragilisation dudit fil. La bonne tenue mécanique de cette liaison permet de cambrer directement le fil résistant dans le but de le bloquer dans le tube.Thus, the welding operation being carried out on the outer wall of the housing and the resistant wire being simply pinched, any direct contact between the welding tool and the resistant wire is prevented and thus the embrittlement of said wire is avoided. The good mechanical strength of this connection makes it possible to directly camber the resistant wire in order to block it in the tube.

Les caractéristiques et avantages de l'invention ressortiront d'ailleurs de la description qui va suivre, à titre d'exemple, en référence au dessin annexé dans lequel :The characteristics and advantages of the invention will become apparent from the description which follows, by way of example, with reference to the appended drawing in which:

La figure 1 est une vue en coupe partielle d'un élément chauffant illustrant une partie du moyen de connexion selon l'invention ; la figure 2 est une vue de détail en coupe d'un logement du moyen de connexion réalisé sous forme d'une fente ; la figure 3 est une vue de détail en coupe d'une variante d'un logement réalisé sous forme d'un tube ; la figure 4 est une vue de l'élement chauffant une fois terminé.Figure 1 is a partial sectional view of an element heater illustrating part of the connection means according to the invention; Figure 2 is a detailed sectional view of a housing of the connection means made in the form of a slot; Figure 3 is a detailed sectional view of a variant of a housing formed as a tube; Figure 4 is a view of the heating element when finished.

L'élément chauffant électrique tel que représenté sur les figures 1 et 4 est destiné à être monté dans un appareil de chauffage par infrarouge tel que, par exemple, un four, un gril, un grille-pain... Cet élément comprend, dans un tube de verre au silicium dit tube quartz 1, un fil bobiné en nickelchrome 2 formant résistance dit fil résistant dont chaque extrémité 3, 4 traverse un manchon isolant 5, 6 en stéatite et est reliée grâce à un moyen de connexion électrique à un fil de câblage 7, 8 en acier doux ou en inox et apte à supporter des hautes températures.The electric heating element as shown in Figures 1 and 4 is intended to be mounted in an infrared heating device such as, for example, an oven, a grill, a toaster ... This element comprises, in a silicon glass tube said quartz tube 1, a wire wound in nickel chromium 2 forming a resistance said resistance wire, each end 3, 4 of which passes through an insulating sleeve 5, 6 of soapstone and is connected by means of an electrical connection to a wire of wiring 7, 8 in mild steel or stainless steel and able to withstand high temperatures.

Selon l'invention, chaque moyen de connexion comporte un logement 9, 10 pratiqué au bout du fil de câblage 7, 8 et dans lequel est inséré le fil résistant 2. Chaque logement 9, 10 est constitué, par exemple, par un perçage réalisé dans l'axe et en bout du fil de câblage. Chaque moyen de connexion comporte en outre un moyen d'arrêt du fil résistant 2 dans ledit logement 9, 10 qui est constitué par une liaison intime entre la paroi 11, 11' du logement 9, 10 et ledit fil 2 obtenue par écrasement et soudure électrique sur ladite paroi. Pour cela, on effectue une soudure par point sur la paroi extérieure 11, 11' du logement 9, 10 de manière que l'outil de soudure 12 (représenté en traits interrompus sur la figure 1) ne soit pas en contact direct avec le fil résistant 2. Ainsi, on réalise en plus de la soudure un "forgeage" de ladite paroi 11, 11' de manière à pincer le fil résistant 2 par écrasement de celle-ci.(Voir figure 4).According to the invention, each connection means comprises a housing 9, 10 formed at the end of the wiring wire 7, 8 and in which the resistant wire 2 is inserted. Each housing 9, 10 is constituted, for example, by a hole made in the axis and at the end of the wiring wire. Each connection means further comprises a means for stopping the resistant wire 2 in said housing 9, 10 which is constituted by an intimate connection between the wall 11, 11 'of the housing 9, 10 and said wire 2 obtained by crushing and welding electric on said wall. For this, a spot welding is carried out on the outer wall 11, 11 'of the housing 9, 10 so that the welding tool 12 (shown in broken lines in Figure 1) is not in direct contact with the wire resistant 2. Thus, in addition to the welding, a "forging" of said wall 11, 11 ′ is carried out so as to pinch the resistant wire 2 by crushing the latter (see FIG. 4).

Par ailleurs, l'invention prévoit de réaliser un moyen de blocage qui permet le maintien du fil résistant 2 entre les deux manchons 5, 6 et la bonne cohésion de l'ensemble fil résistant 2 - manchons 5, 6 - tube quartz 1 une fois assemblés. Ledit moyen est constitué par un pli 13, 14 de chaque extrémité 3, 4 du fil résistant 2 pratiqué hors du manchon correspondant 5, 6 et obtenu par cambrage. L'effort mécanique engendré par ce cambrage est possible grâce à la bonne qualité de la liaison entre le fil résistant 2 et le fil de câblage 7,8, liaison qui ne fragilise pas le fil résistant.
Chaque manchon isolant 5, 6 comporte, au niveau du débouché extérieur 15, une rainure 16 transversale de manière à empêcher la rotation de l'extrémité 3, 4 dudit fil 2 après cambrage.Furthermore, the invention provides for a blocking means which allows the maintenance of the resistant wire 2 between the two sleeves 5, 6 and the good cohesion of the resistant wire assembly 2 - sleeves 5, 6 - quartz tube 1 once assembled. Said means consists of a fold 13, 14 of each end 3, 4 of the resistant wire 2 formed outside the corresponding sleeve 5, 6 and obtained by bending. The mechanical effort generated by this bending is possible thanks to the good quality of the connection between the resistant wire 2 and the wiring wire 7.8, a connection which does not weaken the resistant wire.
Each insulating sleeve 5, 6 comprises, at the level of the external outlet 15, a transverse groove 16 so as to prevent the rotation of the end 3, 4 of said wire 2 after bending.

Selon un autre mode de réalisation de l'invention représenté à la figure 2, le logement 9 est constitué par une fente agencée dans un plan axial et pratiqué en bout du fil de câblage 7.According to another embodiment of the invention shown in FIG. 2, the housing 9 is constituted by a slot arranged in an axial plane and formed at the end of the wiring wire 7.

Selon un autre mode de réalisation de l'invention représenté à la figure 3, le fil de câblage 7 est un tube de diamètre intérieur supérieur à celui du fil résistant 2, et le logement 9 est constitué par le trou d'extrémité du tube.According to another embodiment of the invention shown in Figure 3, the wiring wire 7 is a tube with an inner diameter greater than that of the resistant wire 2, and the housing 9 is formed by the end hole of the tube.

Le procédé de fabrication d'un élément chauffant selon l'invention est particulièrement simple et consiste à réaliser les opérations suivantes : on bobine le fil résistant 2, on en étire les deux extrémités 3, 4, on fait passer la première extrémité 3 au travers d'un premier manchon isolant 5, on introduit ladite extrémité 3 dans le logement 9 d'un premier fil de câblage 7, on soude sur la paroi extérieure 11 du logement 9 sans que l'outil de soudure 12 ne touche le fil résistant 2 de manière à pincer ledit fil, on cambre ladite extrémité 3 du fil résistant 2 de manière à former un pli 13, ensuite on introduit la deuxième extrémité 4 du fil résistant 2 dans le logement 10 d'un deuxième fil de câblage 8, on soude comme précédemment sur la paroi 11' du logement 10, on enfile l'ensemble fil résistant 2 et deuxième fil de câblage 8 dans le tube quartz 1 puis on ferme le tube 1 par le deuxième manchon isolant 6, on cambre alors la deuxième extrémité 4 du fil résistant 2 de manière à former un pli 14 et à immobiliser l'ensemble tube 1 - manchons 5, 6 - fil résistant 2. Enfin, on relie les deux fils de câblage 7, 8 au réseau électrique (non représenté).The method of manufacturing a heating element according to the invention is particularly simple and consists in carrying out the following operations: the resistant wire 2 is wound, the two ends 3, 4 are stretched, the first end 3 is passed through of a first insulating sleeve 5, said end 3 is introduced into the housing 9 of a first wiring wire 7, it is welded to the outer wall 11 of the housing 9 without the soldering tool 12 touching the resistant wire 2 so as to pinch said wire, we bend said end 3 of the resistant wire 2 so as to form a fold 13, then we introduce the second end 4 of the resistant wire 2 into the housing 10 of a second wiring wire 8, we weld as previously on the wall 11 ′ of the housing 10, the resistant wire assembly is threaded 2 and second wiring wire 8 in the quartz tube 1 then the tube 1 is closed by the second insulating sleeve 6, the second end 4 of the resistant wire 2 is then arched so as to form a fold 14 and to immobilize the tube assembly 1 - sleeves 5, 6 - resistant wire 2. Finally, the two wiring wires 7, 8 are connected to the electrical network (not shown).

Claims (7)

  1. Electrical heating element designed tt be mounted in an infrared heating appliance and comprising, in a silicon glass tube called a quartz tube (1), a coiled wire (2) forming a resistance called a resistant wire each end (3, 4) of which passes through an insulating sleeve (5, 6) and is connected by means of an electrical connection means to a wiring conductor (7, 8) suitable for withstanding high temperatures, and whose locking means enables the resistant wire (2) to be held between the two sleeves (5, 6),
    characterised in that the connection means includes a housing (9, 10) formed at the end of the wiring conductor (7, 8) and in which the resistant wire (2) is inserted, and a means of retaining the resistant wire (2) in the said housing (9, 10), while the locking means consists of a bend (13, 14) at each end (3, 4) of the resistant wire (2) formed outside the corresponding sleeve (5, 6).
  2. Heating element according to Claim 1,
    characterised in that the means of retaining the resistant wire (2) in its housing (9, 10) consists of a close connection between the wall (11, 11') of the housing (9, 10) and the said wire (2) obtained by crushing and electric welding onto the said wall.
  3. Heating element according to Claim 1 or 2,
    characterised in that the housing (9, 10) consists of a perforation produced in the axis of and at the end of the wiring conductor (7, 8).
  4. Heating element according to Claim 1 or 2,
    characterised in that the housing (9, 10) consists of a slot arranged in an axial plane and formed at the end of the wiring conductor (7, 8).
  5. Heating element according to Claim 1 or 2,
    characterised in that the wiring conductor (7, 8) is a tube with an internal diameter greater than that of the resistant wire (2), and the housing (9, 10) consists of the end hole of the tube.
  6. Heating element according to any one of the preceding claims,
    characterised in that each insulating sleeve (5, 6) has, at the external outlet (15), a groove (16) which is transverse so as to prevent the end (3, 4) of the said wire (2) from rotating after curving.
  7. Method of manufacturing a heating element according to any one of the preceding claims,
    characterised in that the resistant wire (2) is coiled, the two ends (3, 4) thereof are drawn, the first end (3) is passed through a first insulating sleeve (5), the said end (3) is inserted into the housing (9) of a first wiring conductor (7), the external wall (11, 11') of the housing (9) is welded onto so as to grip the resistant wire (2), the said end (3) of the resistant wire (2) is curved so as to form a bend (13), the second end (4) of the resistant wire (2) is inserted into the housing (10) of a second wiring conductor (8), the wall (11') of the housing (10) is welded onto as before, the assembly consisting of resistant wire (2) and second wiring conductor (8) is slipped into the quartz tube (1), the tube (1) is closed off by the second insulating sleeve (6), and then the second end (4) of the resistant wire (2) is curved to form a bend (14) and immobilise the assembly consisting of tube (1), sleeves (5, 6) and resistant wire (2).
EP92112072A 1991-07-31 1992-07-15 Electric heating element for infrared heating device and its manufacturing method Expired - Lifetime EP0526778B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9109761A FR2680069B1 (en) 1991-07-31 1991-07-31 ELECTRIC HEATING ELEMENT FOR MOUNTING IN AN INFRARED HEATING APPARATUS AND MANUFACTURING METHOD.
FR9109761 1991-07-31

Publications (3)

Publication Number Publication Date
EP0526778A2 EP0526778A2 (en) 1993-02-10
EP0526778A3 EP0526778A3 (en) 1993-07-14
EP0526778B1 true EP0526778B1 (en) 1996-09-11

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EP92112072A Expired - Lifetime EP0526778B1 (en) 1991-07-31 1992-07-15 Electric heating element for infrared heating device and its manufacturing method

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EP (1) EP0526778B1 (en)
AT (1) ATE142838T1 (en)
DE (1) DE69213611T2 (en)
ES (1) ES2094258T3 (en)
FR (1) FR2680069B1 (en)

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CN101252794B (en) * 2007-12-27 2010-08-04 王子金 Conductive rod seal insulating device of electric heating stove and electric heating stove using the same
CN104902593A (en) * 2015-05-12 2015-09-09 禹伟 Super audio heater electric heating wire series connection head

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FR2706110B1 (en) * 1993-06-03 1995-07-13 Seb Sa Method and circuit for regulating heating elements.
WO1996018280A1 (en) * 1994-12-06 1996-06-13 Christian Ullrich Radiation projector and radiator screen
CN101984731B (en) * 2010-10-19 2012-11-07 李家俊 Single-end quartz glass electric heating tube
CN105072714B (en) * 2015-08-04 2018-03-16 高晖昭 The cascaded structure and welding method of infrared hot plate

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Publication number Priority date Publication date Assignee Title
CN101252794B (en) * 2007-12-27 2010-08-04 王子金 Conductive rod seal insulating device of electric heating stove and electric heating stove using the same
CN104902593A (en) * 2015-05-12 2015-09-09 禹伟 Super audio heater electric heating wire series connection head

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Publication number Publication date
ES2094258T3 (en) 1997-01-16
ATE142838T1 (en) 1996-09-15
DE69213611T2 (en) 1997-02-06
DE69213611D1 (en) 1996-10-17
EP0526778A2 (en) 1993-02-10
FR2680069B1 (en) 1994-04-29
FR2680069A1 (en) 1993-02-05
EP0526778A3 (en) 1993-07-14

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