EP0654135B1 - Oil-burner nozzle connection - Google Patents

Oil-burner nozzle connection Download PDF

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Publication number
EP0654135B1
EP0654135B1 EP94908150A EP94908150A EP0654135B1 EP 0654135 B1 EP0654135 B1 EP 0654135B1 EP 94908150 A EP94908150 A EP 94908150A EP 94908150 A EP94908150 A EP 94908150A EP 0654135 B1 EP0654135 B1 EP 0654135B1
Authority
EP
European Patent Office
Prior art keywords
nozzle assembly
conducting
areas
conducting foil
insulated
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
EP94908150A
Other languages
German (de)
French (fr)
Other versions
EP0654135A1 (en
Inventor
Rafael Benavides
Werner DÖHLA
Walter Steeb
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.)
Rapa Rausch and Pausch Elektrotechnische Spezialfabrik GmbH
Original Assignee
Rapa Rausch and Pausch Elektrotechnische Spezialfabrik GmbH
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 Rapa Rausch and Pausch Elektrotechnische Spezialfabrik GmbH filed Critical Rapa Rausch and Pausch Elektrotechnische Spezialfabrik GmbH
Publication of EP0654135A1 publication Critical patent/EP0654135A1/en
Application granted granted Critical
Publication of EP0654135B1 publication Critical patent/EP0654135B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/44—Preheating devices; Vaporising devices
    • 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
    • H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • H05B3/141—Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds
    • 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
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/28—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material

Definitions

  • the invention relates to a nozzle assembly for oil burners according to the preamble of the main claim. It has already been proposed to move electrical components which are required for operating a nozzle assembly for oil burners into the interior of the nozzle assembly. In particular, if the power lines required for this are to be laid in the interior of the nozzle assembly, taking into account the connection dimensions to existing oil firing systems, it is important to reduce the number of electrical components, including the lines and connections. It is also known to provide oil preheaters arranged in the interior of the nozzle assembly with PTC heating elements (for example DE-PS 29 19 763).
  • the PTC disks which are equipped with two contact surfaces, are electrically contacted by soldered wires or by contact plates and then embedded in a separately applied electrical insulating film or insulating compound.
  • these known solutions require a relatively high level of manual assembly work, as a result of which assembly errors are inevitable.
  • the object is achieved by the characterizing features of the claims.
  • the advantages of the invention exist in that the direct contacting of the electrical components located in the nozzle assembly, in particular the PTC heating elements used on the preheater, with a conductor foil which has exposed conductor track areas and definedly positioned soldering eyes, brings about a considerable reduction in the amount of motivation required. By minimizing the assembly work steps, assembly errors are largely excluded. The reduction of fault-prone electrical connection points also leads to increased operational reliability.
  • the invention brings about a space-saving installation of the necessary wiring assemblies, at the same time eliminating additional, separate electrical insulation measures, in particular the PTC heating elements used. Clear assembly wiring is achieved and easier testing of the electrical assemblies before final assembly is ensured.
  • a PTC heating element 1 can be seen, which is contacted by an electrical insulation exposes exposed conductor track areas 2 of a conductor foil 3.
  • the conductor foil 3 is dimensioned and folded in such a way that the PTC heating element is enveloped over the entire surface, at least over its contact surfaces, and is thus electrically insulated by the conductor foil carrier material 6.
  • the other conductor tracks of the conductor foil which are shown in broken lines in FIGS. 2 and 3, are provided with electrical insulation on both sides except for the areas of the soldering eyes.
  • FIG. 2 shows a development of the conductor foil used in accordance with FIG. 1, which illustrates the conductor path regions 2 which are exposed by electrical insulation and which correspond in the folded state to the contact surfaces of the PTC heating element.
  • the electrical insulation of the other interconnect areas is illustrated by their dashed lines.
  • a development of a conductor film 3 is shown, which serves to hold two PTC heating elements in the folded state.
  • the exposed interconnect regions 2 are wired to one another in such a way that the interconnect regions 2 and 21 used for contacting the PTC heating elements are each at the same potential in the operating state.
  • soldering eyes 4 are provided in this exemplary embodiment, which serve to receive, for example, a thermostat integrated in the nozzle assembly via its contact points, such as contact pins.
  • the folded conductor film containing at least one PTC heating element is clamped onto the fuel-carrying channel of the nozzle assembly.
  • the conductor foil has twice as much exposed conductor track areas as the PTC heating elements used.
  • connections 5 which are not further divided.

Abstract

The invention concerns an oil-burner nozzle connection including electrical sub-assemblies. The aim of the invention is to ensure that these sub-assemblies, in particular PTC heating elements, can be assembled simply and with high contacting accuracy. This is achieved by use of a conductive sheet which has conductor-track zones which are not covered by insulating layers and which, when folded, touch the PTC contact surfaces and have the necessary soldering lands which match the contact points of other electrical sub-assemblies.

Description

Die Erfindung betrifft einen Düsenstock für Ölbrenner gemäß der Gattung des Hauptanspruchs.
Es wurde bereits vorgeschlagen, elektrische Bauteile, die für das Betreiben eines Düsenstocks für Ölbrenner erforderlich sind in das Innere des Düsenstocks zu verlagern. Insbesondere dann, wenn die dafür erforderlichen Stromleitungen unter Beachtung der Anschlußmaße an vorhandene Ölfeuerungen in das Innere des Düsenstocks verlegt werden sollen, kommt es auf die Reduzierung der elektrischen Bauteile einschließlich der Leitungen und Anschlüsse an. Es ist darüberhinaus bekannt, im Inneren des Düsenstocks angeordnete Ölvorwärmer mit PTC-Heizelementen zu versehen (bspw. DE-PS 29 19 763). Dabei werden die mit zwei Kontaktflächen ausgestatteten PTC-Scheiben elektrisch durch angelötete Drähte oder durch aufgelegte Kontaktplättchen kontaktiert und danach in eine gesondert aufgebrachte elektrische Isolierfolie bzw. Isoliermasse eingebettet. In jedem Fall bedürfen diese bekannten Lösungen eines relativ hohen manuellen Montageaufwands, wodurch auch Montagefehler unvermeidlich sind. Darüber hinaus liegen in diesen Fällen der Kontaktierung mehrere störanfällige elektrische Verbindungsstellen vor.The invention relates to a nozzle assembly for oil burners according to the preamble of the main claim.
It has already been proposed to move electrical components which are required for operating a nozzle assembly for oil burners into the interior of the nozzle assembly. In particular, if the power lines required for this are to be laid in the interior of the nozzle assembly, taking into account the connection dimensions to existing oil firing systems, it is important to reduce the number of electrical components, including the lines and connections. It is also known to provide oil preheaters arranged in the interior of the nozzle assembly with PTC heating elements (for example DE-PS 29 19 763). The PTC disks, which are equipped with two contact surfaces, are electrically contacted by soldered wires or by contact plates and then embedded in a separately applied electrical insulating film or insulating compound. In any case, these known solutions require a relatively high level of manual assembly work, as a result of which assembly errors are inevitable. In addition, there are several fault-prone electrical connection points in these cases of contacting.

Es ist daher Aufgabe der Erfindung, einen Düsenstock für Ölbrenner anzugeben, der elektrische Bauteile beinhaltet, der mit geringem Montageaufwand herstellbar ist und zugleich die Nachteile des Standes der Technik vermeidet.It is therefore an object of the invention to provide a nozzle assembly for oil burners which contains electrical components which can be produced with little assembly effort and at the same time avoids the disadvantages of the prior art.

Die Aufgabe wird durch die kennzeichnenden Merkmale der Patentansprüche gelöst. Die Vorteile der Erfindung bestehen darin, daß durch die unmittelbare Kontaktierung der im Düsenstock befindlichen elektrischen Bauteile, insbesondere der am Vorwärmer zum Einsatz gelangenden PTC-Heizelementen, mit einer Leiterfolie, die freigelegte Leitbahnbereiche und definiert positionierte Lötaugen aufweist, eine erhebliche Reduzierung des Motageaufwands bewirkt wird. Durch die Minimierung der Montagearbeitsgänge werden Montagefehler weitestgehend ausgeschlossen. Die Verringerung störanfälliger elektrischer Verbindungsstellen führt darüber hinaus zu einer erhöhten Betriebssicherheit. Die Erfindung bewirkt einen platzsparenden Einbau der erforderlichen Verdrahtungsbaugruppen, wobei zugleich zusätzliche, gesonderte elektrische Isolierungsmaßnahmen, insbesondere der zum Einsatz gelangenden PTC-Heizelementen entfällt. Es wird eine übersichtliche Baugruppenverdrahtung erzielt und eine erleichterte Prüfbarkeit der elektrischen Baugruppen vor der Endmontage gewährleistet.The object is achieved by the characterizing features of the claims. The advantages of the invention exist in that the direct contacting of the electrical components located in the nozzle assembly, in particular the PTC heating elements used on the preheater, with a conductor foil which has exposed conductor track areas and definedly positioned soldering eyes, brings about a considerable reduction in the amount of motivation required. By minimizing the assembly work steps, assembly errors are largely excluded. The reduction of fault-prone electrical connection points also leads to increased operational reliability. The invention brings about a space-saving installation of the necessary wiring assemblies, at the same time eliminating additional, separate electrical insulation measures, in particular the PTC heating elements used. Clear assembly wiring is achieved and easier testing of the electrical assemblies before final assembly is ensured.

Die Erfindung soll anhand der schematischen Darstellung folgender Ausführungsbeispiele näher erläutert werden. Es zeigen:

Fig. 1
ein PTC-Heizelement, das in eine mit freigelegten Leitbahnbereichen ausgestattete Leiterfolie eingelegt ist, im seitlichen Schnitt,
Fig. 2
eine Abwicklung der Leiterfolie, die in Fig. 1 zur Anwendung gelangt und
Fig. 3
eine Abwicklung einer Leiterfolie, die der Aufnahme von zwei PTC-Heizelementen und dem Anschluß weiterer elektrischer Baugruppen dienen soll.
The invention will be explained in more detail using the schematic representation of the following exemplary embodiments. Show it:
Fig. 1
a PTC heating element, which is inserted into a conductor foil equipped with exposed conductor track areas, in a lateral section,
Fig. 2
a development of the conductor film, which is used in Fig. 1 and
Fig. 3
a development of a conductor foil, which is intended to accommodate two PTC heating elements and the connection of further electrical modules.

In Fig. 1 ist ein PTC-Heizelement 1 ersichtlich, das seine Kontaktierung über von einer elektrischen Isolierung freigelegte Leitbahnbereiche 2 einer Leiterfolie 3 erfährt. Die Leiterfolie 3 ist dabei so dimensioniert und gefaltet, daß das PTC-Heizelement nach außen, zumindest über seinen Kontaktflächen ganzflächig umhüllt und damit durch das Leiterfolienträgermaterial 6 elektrisch isoliert ist. die anderen Leitbahnen der Leiterfolie, die in den Figuren 2 und 3 strichliniert dargestellt sind, sind bis auf die Bereiche der Lötaugen beidseitig mit einer elektrischen Isolierung versehen.In Fig. 1, a PTC heating element 1 can be seen, which is contacted by an electrical insulation exposes exposed conductor track areas 2 of a conductor foil 3. The conductor foil 3 is dimensioned and folded in such a way that the PTC heating element is enveloped over the entire surface, at least over its contact surfaces, and is thus electrically insulated by the conductor foil carrier material 6. the other conductor tracks of the conductor foil, which are shown in broken lines in FIGS. 2 and 3, are provided with electrical insulation on both sides except for the areas of the soldering eyes.

In Fig. 2 ist eine Abwicklung der zum Einsatz nach Fig. 1 gelangenden Leiterfolie dargestellt, die die von einer elektrischen Isolierung freigelegten Leitbahnbereiche 2, die im gefalteten Zustand mit den Kontaktflächen des PTC-Heizelementes korrespondieren, verdeutlicht. Die elektrische Isolierung der übrigen Leitbahnbereiche ist durch deren strichlinierte Darstellung verdeutlicht.FIG. 2 shows a development of the conductor foil used in accordance with FIG. 1, which illustrates the conductor path regions 2 which are exposed by electrical insulation and which correspond in the folded state to the contact surfaces of the PTC heating element. The electrical insulation of the other interconnect areas is illustrated by their dashed lines.

In Fig. 3 ist eine Abwicklung einer Leiterfolie 3 dargestellt, die im gefalteten Zustand der Aufnahme zweier PTC-Heizelemente dient. Die freigelegten Leitbahnbereiche 2 sind dabei so miteinander verdrahtet, daß die der Kontaktierung der PTC-Heizelemente dienenden Leitbahnbereiche 2 und 21 im Betriebszustand jeweils auf gleichem Potential liegen. Daneben sind in diesem Ausführungsbeispiel Lötaugen 4 vorgesehen, die der Aufnahme bspw. eines im Düsenstock integrierten Thermostaten über dessen Kontaktstellen, wie Kontaktstifte, dienen.In Fig. 3, a development of a conductor film 3 is shown, which serves to hold two PTC heating elements in the folded state. The exposed interconnect regions 2 are wired to one another in such a way that the interconnect regions 2 and 21 used for contacting the PTC heating elements are each at the same potential in the operating state. In addition, soldering eyes 4 are provided in this exemplary embodiment, which serve to receive, for example, a thermostat integrated in the nozzle assembly via its contact points, such as contact pins.

Es liegt im Rahmen der Erfindung, den Erfordernissen entsprechend, weitere Leitbahnen und Lötaugen auf der Leiterfolie 3 vorzusehen, die der Kontaktierung bspw. eines nicht näher dargestellten Magnetventils und anderer im Düsenstock vorgesehener elektrischer Bauteile dienen.It is within the scope of the invention, in accordance with the requirements, to provide further interconnects and solder eyes on the conductor foil 3, which are used for contacting, for example, a solenoid valve, not shown, and other electrical components provided in the nozzle assembly.

Die gefaltete, wenigstens ein PTC-Heizelement beinhaltende Leiterfolie wird auf den brennstofführenden Kanal des Düsenstocks aufgeklemmt. Die Leiterfolie weist doppelt so viel freigelegte Leitbahnbereiche, wie zum Einsatz gelangende PTC-Heizelemente auf.The folded conductor film containing at least one PTC heating element is clamped onto the fuel-carrying channel of the nozzle assembly. The conductor foil has twice as much exposed conductor track areas as the PTC heating elements used.

Der äußere elektrische Anschluß der durch die Leiterfolie kontaktierten Bauelemente des Düsenstocks erfolgt über nicht näher untergliederte Anschlüsse 5.The external electrical connection of the components of the nozzle assembly contacted by the conductor foil is made via connections 5 which are not further divided.

Es liegt im Rahmen der Erfindung, weitere freigelegte Leitbahnbereiche zu Kontaktierung weiterer PTC-Heizelemente vorzusehen. Ebenso kann die Leiterfolie zwischen den Kontaktierungsbereichen auch geschlitzt ausgeführt sein. Weiterhin liegt es im Rahmen der Erfindung, auch mehr als eine Leiterfolie einzusetzen, wobei der Einsatz einer einzigen Leiterfolie allerdings die ökonomisch vorteilhafteste Lösung darstellt.It is within the scope of the invention to provide further exposed interconnect areas for contacting further PTC heating elements. Likewise, the conductor foil between the contacting areas can also be slotted. It is also within the scope of the invention to use more than one conductor foil, the use of a single conductor foil being the most economically advantageous solution.

Claims (6)

  1. Oil burner nozzle assembly comprising electrical components, in particular at least one PTC-heating element, characterized in that a conducting foil (3) is employed for current supply within the nozzle assembly, which conducting foil (3) being provided on one of its faces with non-insulated conducting areas (2, 21) embodied in such a manner that when the conducting foil is folded it contacts the contact areas of said at least one PCT-heating element (1), the conducting foil base material (6) providing the external electrical insulation of the heating element in enveloping the latter.
  2. Nozzle assembly as claimed in claim 1, wherein, apart from contacts (5) for establishing electrical connections of the nozzle assembly to the outside and for said non-insulated conducting areas (2, 21), soldering terminals (4) are provided which are positioned to meet the contact areas of further electrical components of the nozzle assembly such as thermostat switches and/or rectifiers and/or magnet valves.
  3. Nozzle assembly as claimed in claim 1 or 2, wherein the electrical contacting of the entire electrical components within the nozzle assembly is achieved by a single conducting foil once and multiple folded, respectively
  4. Nozzle assembly according to one of the preceding claims, wherein at least one PCT-heating element (1) is entirely covered on both of its contact faces by the conducting foil portions comprising the non-insulated conducting areas (2, 21) and is electrically insulated to the exterior via the conducting foil base material.
  5. Nozzle assembly as claimed in claims 1 or 4, wherein at least said one of the PCT-heating elements enveloped by said conducting foil portions is clamped upon the fuel duct of the nozzle assembly.
  6. Nozzle assembly as claimed in claims 1 or 4, wherein the conducting foil portion comprising the non-insulated conducting areas is provided with twice the number of non-insulated conducting areas as PCT-heating elements employed and is once and multi-folded, respectively.
EP94908150A 1992-08-17 1993-08-06 Oil-burner nozzle connection Expired - Lifetime EP0654135B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4227177 1992-08-17
DE4227177A DE4227177C1 (en) 1992-08-17 1992-08-17 Nozzle assembly for oil burners
PCT/EP1993/002099 WO1994004872A1 (en) 1992-08-17 1993-08-06 Oil-burner nozzle connection

Publications (2)

Publication Number Publication Date
EP0654135A1 EP0654135A1 (en) 1995-05-24
EP0654135B1 true EP0654135B1 (en) 1996-10-23

Family

ID=6465714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94908150A Expired - Lifetime EP0654135B1 (en) 1992-08-17 1993-08-06 Oil-burner nozzle connection

Country Status (4)

Country Link
US (1) US5679276A (en)
EP (1) EP0654135B1 (en)
DE (2) DE4227177C1 (en)
WO (1) WO1994004872A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59904837D1 (en) * 1998-12-28 2003-05-08 Suntec Ind France S A Longvic Preheater for an oil pressure atomization burner

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0017057B1 (en) * 1979-03-27 1982-03-10 Danfoss A/S Fuel oil preheating device
DE2919763C2 (en) * 1979-05-16 1983-07-07 Danfoss A/S, 6430 Nordborg Atomizing burners for oil firing systems
US4861966A (en) * 1985-10-15 1989-08-29 Raychem Corporation Method and apparatus for electrically heating diesel fuel utilizing a PTC polymer heating element
US4789850A (en) * 1987-12-07 1988-12-06 Robertshaw Controls Company Temperature sensor construction and method of making the same
AU637370B2 (en) * 1989-05-18 1993-05-27 Fujikura Ltd. Ptc thermistor and manufacturing method for the same
EP0463581A1 (en) * 1990-06-27 1992-01-02 Siemens Aktiengesellschaft Self-regulating heating element for heating flowing media
WO1992006570A1 (en) * 1990-09-27 1992-04-16 Pct Ceramics Heiz- Und Regeltechnik Gesellschaft M. B. H. Self-regulating electric heating element
JPH0521207A (en) * 1991-07-12 1993-01-29 Daito Tsushinki Kk Ptc element

Also Published As

Publication number Publication date
DE4227177C1 (en) 1993-10-21
EP0654135A1 (en) 1995-05-24
WO1994004872A1 (en) 1994-03-03
US5679276A (en) 1997-10-21
DE59304314D1 (en) 1996-11-28

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