EP0468419B1 - Device for heating and evaporating of media, particularly suitable for operation in liquids - Google Patents

Device for heating and evaporating of media, particularly suitable for operation in liquids Download PDF

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Publication number
EP0468419B1
EP0468419B1 EP91112266A EP91112266A EP0468419B1 EP 0468419 B1 EP0468419 B1 EP 0468419B1 EP 91112266 A EP91112266 A EP 91112266A EP 91112266 A EP91112266 A EP 91112266A EP 0468419 B1 EP0468419 B1 EP 0468419B1
Authority
EP
European Patent Office
Prior art keywords
disc
metal
cup
contact pin
free
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
EP91112266A
Other languages
German (de)
French (fr)
Other versions
EP0468419A1 (en
Inventor
Robert Karner
Klaus Herrmann
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.)
ERNST HERRMANN ING FABRIKATION ELEKTRISCHER KONTAKTELEMENTE Firma
Siemens AG
Original Assignee
ERNST HERRMANN ING FABRIKATION ELEKTRISCHER KONTAKTELEMENTE Firma
Siemens AG
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 ERNST HERRMANN ING FABRIKATION ELEKTRISCHER KONTAKTELEMENTE Firma, Siemens AG filed Critical ERNST HERRMANN ING FABRIKATION ELEKTRISCHER KONTAKTELEMENTE Firma
Priority to AT9191112266T priority Critical patent/ATE105130T1/en
Publication of EP0468419A1 publication Critical patent/EP0468419A1/en
Application granted granted Critical
Publication of EP0468419B1 publication Critical patent/EP0468419B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05B3/10—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

Definitions

  • the invention relates to a device for heating and evaporating media, which is particularly suitable for operation in liquids and gases and has a metal plate and a thermally connected with its one end face to the metal plate and thermally connected PTC thermistor, which on both end faces with annular electrodes , in particular is coated.
  • a device of the type mentioned is known from EP-A-0 290 159.
  • the present invention has for its object to provide a device of the type mentioned, which is reliable, is characterized by a stable structure and for which no significant manufacturing problems arise.
  • the invention provides in a device according to the preamble of claim 1 that the metal plate is a metal cup, that the PTC disc is glued to the inside surface of the cup base by means of electrically and thermally conductive adhesive, that the PTC disc - viewed in the direction of thickness - Is preferably broken in the middle that a metallic contact pin is guided through the opening electrically insulated, which is firmly connected at one end to the inner surface of the cup bottom and electrically conductive and protrudes with its other end over the metal cup that on the free-standing contact pin part against Contact pin electrically insulated metal tube is pushed, which carries at the end facing the PTC disc contact springs which bear against the electrode of the free end face of the PTC disc that an insulating washer is pushed onto the metal tube , which is guided against the end face of the cup wall and that the outer surface of the metal cup and the free end faces of the insulating washer are encased with high-temperature-resistant plastic, in particular overmolded, in such a way that the
  • a metal cup e.g. B. aluminum cup, which at least dips into the medium that is to be heated or evaporated during operation of the device with its cup base.
  • the metal cup 1 is heated via a PTC thermistor disc 2, which is glued to the inside of the cup by means of an electrically and thermally conductive adhesive 3.
  • the PTC thermistor disk 2 has on its opposite side surfaces effective metallic coatings 4, 5, which can be connected to the power supply via the connections described below.
  • the electrical contacting of the assignment 5 takes place via the electrically conductive adhesive 3 and a metallic contact pin 6 encased with an insulating tube 7, onto which the PTC disk 2, which is perforated in the center, is pushed - see FIG. 2a.
  • the contact pin 6, which facilitates the assembly of the PTC thermistor 2 is positively with its end facing the cup inside, z. B. connected by welding or soldering to the inside of the cup.
  • the arrangement, consisting of metal cup 1, PTC thermistor 2, Contact pin 6 and metal tube 8 together with contact springs 9, 9 are sealed by an insulating disc 10 facing away from the outside of the cup bottom.
  • the plastic disc 10 is, for. B. designed in a preferred embodiment quasi as a plastic cup, in the optionally raised edge region 10, an annular groove 11 is embedded, in which the metal cup 1 dips with the free end of its cup wall.
  • the entire device with the exception of the outer cup base and parts of the contact pin 6 and the metal tube 8, is finally encapsulated with high-temperature-resistant plastic 12, under the effect of which the inside of the cup is additionally protected against atmospheric influences and, moreover, the individual elements of the device are held in their predetermined position.

Abstract

A device for heating and evaporating of media, which is particularly suitable for operation in fluids and gases, has a metal cup (1), a PTC resistor disc (2), which is bonded onto the internal base of the cup by means of an electrically and thermally conductive adhesive (3), is provided with electrodes (4, 5) on both sides and is perforated when viewed in the longitudinal centre axis, a contact pin (6), which is coated with a dielectric material hose (7) and whose end guided through the perforation makes electrically conductive contact with the internal base of the cup, in particular is connected in a positively locking manner thereto, a metal tube (8) which is pushed onto the insulated contact pin (6) having contact springs (9, 9) arranged on one end whose spring force is directed against the side surface of the PTC resistor disc (2) facing away from the internal base of the cup, and a dielectric material disc (10) which is pushed onto the metal tube (8) and rests with its edge surface close against the annular end surface of the metal cup (1), the complete device (with the exception of the external base of the cup and parts of the contact pin (6) and of the metal tube (8)) being extrusion-coated with high-temperature-resistant plastic (12). <IMAGE>

Description

Der Erfindung betrifft eine Vorrichtung zum Erwärmen und Verdampfen von Medien, die insbesondere zum Betrieb in Flüssigkeiten und Gasen geeignet ist und eine Metallplatte sowie eine mit ihrer einen Stirnfläche mit der Metallplatte elektrisch kontaktierte und wärmeleitend verbundene Kaltleiterscheibe aufweist, die auf beiden Stirnflächen mit ringförmigen Elektroden belegt, insbesondere beschichtet ist.The invention relates to a device for heating and evaporating media, which is particularly suitable for operation in liquids and gases and has a metal plate and a thermally connected with its one end face to the metal plate and thermally connected PTC thermistor, which on both end faces with annular electrodes , in particular is coated.

Eine Vorrichtung der eingangsgenannten Art ist aus EP-A-0 290 159 bekannt.A device of the type mentioned is known from EP-A-0 290 159.

Die vorliegende Erfindung hat sich die Aufgabe gestellt, eine Vorrichtung der eingangsgenannten Art zu schaffen, die betriebssicher ist, sich durch einen stabilen Aufbau auszeichnet und zu dem keine wesentlichen fertigungstechnischen Probleme aufwirft.The present invention has for its object to provide a device of the type mentioned, which is reliable, is characterized by a stable structure and for which no significant manufacturing problems arise.

Zur Lösung dieser Aufgabe sieht die Erfindung bei einer Vorrichtung gemäß Oberbegriff des Patentanspruchs 1 vor, daß die Metallplatte ein Metallbecher ist, daß die Kaltleiterscheibe mit ihrer einen Stirnfläche mittels elektrisch- und wärmeleitendem Kleber auf die Becherbodeninnenfläche aufgeklebt ist, daß die Kaltleiterscheibe - betrachtet in Dickenrichtung - bevorzugt mittig durchbrochen ist, daß durch die Durchbrechung elektrisch isoliert ein metallischer Kontaktstift geführt ist, der mit seinem einen Ende mit der Becherbodeninnenfläche fest und elektrisch leitend verbunden ist und mit seinem anderen Ende über den Metallbecher hinausragt, daß auf das freistehende Kontaktstiftteil ein gegen den Kontaktstift elektrisch isolierendes Metallrohr aufgeschoben ist, das an dem zur Kaltleiterscheibe gekehrten Ende Kontaktfedern trägt, die gegen die Elektrode der freien Stirnfläche der Kaltleiterscheibe anliegen, daß auf das Metallrohr eine Isolierstoffscheibe aufgeschoben ist, die gegen die Stirnfläche der Becherwandung geführt ist und daß die Mantelfläche des Metallbechers und die freien Stirnflächen der Isolierstoffscheibe mit hochtemperaturbeständigem Kunststoff umhüllt, insbesondere umspritzt sind, derart, daß die freie Stirnfläche der Metallplatte und die hierzu gegenüberliegend herausgeführten Kontaktteile frei von Kunststoff sind.To achieve this object, the invention provides in a device according to the preamble of claim 1 that the metal plate is a metal cup, that the PTC disc is glued to the inside surface of the cup base by means of electrically and thermally conductive adhesive, that the PTC disc - viewed in the direction of thickness - Is preferably broken in the middle that a metallic contact pin is guided through the opening electrically insulated, which is firmly connected at one end to the inner surface of the cup bottom and electrically conductive and protrudes with its other end over the metal cup that on the free-standing contact pin part against Contact pin electrically insulated metal tube is pushed, which carries at the end facing the PTC disc contact springs which bear against the electrode of the free end face of the PTC disc that an insulating washer is pushed onto the metal tube , which is guided against the end face of the cup wall and that the outer surface of the metal cup and the free end faces of the insulating washer are encased with high-temperature-resistant plastic, in particular overmolded, in such a way that the free end face of the metal plate and the contact parts which are brought out opposite thereto are free of plastic.

Die Erfindung wird nachstehend anhand eines Ausführungsbeispieles näher erläutert - siehe hierzu die in der Figur dargestellte Vorrichtung in teils geschnittener Ansicht.The invention is explained in more detail below using an exemplary embodiment - see the device shown in the figure in a partially sectioned view.

Mit 1 ist ein Metallbecher, z. B. Aluminiumbecher bezeichnet, der im Betrieb der Vorrichtung zumindest mit seinem Becherboden in das Medium eintaucht, das erwärmt oder verdampft werden soll. Der Metallbecher 1 wird dabei über eine Kaltleiterscheibe 2 beheizt, die mittels eines elektrisch- und gut wärmeleitenden Klebers 3 auf den Becherinnenboden aufgeklebt ist.With 1 is a metal cup, e.g. B. aluminum cup, which at least dips into the medium that is to be heated or evaporated during operation of the device with its cup base. The metal cup 1 is heated via a PTC thermistor disc 2, which is glued to the inside of the cup by means of an electrically and thermally conductive adhesive 3.

Die Kaltleiterscheibe 2 trägt auf ihren gegenüberliegenden Seitenflächen als Elektroden wirksame metallische Belegungen 4, 5, die über nachstehend beschriebene Anschlüsse an die Stromversorgung anschließbar sind. So erfolgt die elektrische Kontaktierung der Belegung 5 über den elektrisch leitenden Kleber 3 und einen mit einem Isolierschlauch 7 umhüllten metallischen Kontaktstift 6, auf den die mittig durchbrochene Kaltleiterscheibe 2 - siehe 2a - aufgeschoben ist. Der Kontaktstift 6, der im übrigen die Montage der Kaltleiterscheibe 2 erleichtert, ist mit seinem zum Becherinneren gekehrten Stirnende formschlüssig, z. B. durch Schweißen oder Löten mit dem Becherinnenboden verbunden.The PTC thermistor disk 2 has on its opposite side surfaces effective metallic coatings 4, 5, which can be connected to the power supply via the connections described below. Thus, the electrical contacting of the assignment 5 takes place via the electrically conductive adhesive 3 and a metallic contact pin 6 encased with an insulating tube 7, onto which the PTC disk 2, which is perforated in the center, is pushed - see FIG. 2a. The contact pin 6, which facilitates the assembly of the PTC thermistor 2, is positively with its end facing the cup inside, z. B. connected by welding or soldering to the inside of the cup.

Die elektrische Kontaktierung der Belegung 4 erfolgt über Kontaktfedern 9, 9, die unter der Wirkung ihrer Federkräfte gegen die Belegung 4 angedrückt werden und an dem einen Stirnende eines auf den Kontaktstift 6 aufgeschobenen Metallrohres 8 befestigt sind.The electrical contacting of the assignment 4 takes place via contact springs 9, 9, which are pressed under the action of their spring forces against the assignment 4 and are fastened to the one end of a metal tube 8 pushed onto the contact pin 6.

Die Anordnung, bestehend aus Metallbecher 1, Kaltleiter 2, Kontaktstift 6 und Metallrohr 8 samt Kontaktfedern 9, 9 ist durch eine zur Becherbodenaußenseite abgekehrte Isolierstoffscheibe 10 dicht verschlossen. Die Kunststoffscheibe 10 ist z. B. in einem bevorzugten Ausführungsbeispiel quasi als Kunststoffbecher gestaltet, in dessen gegebenenfalls erhabenen Randbereich 10 eine ringförmige Nut 11 eingelassen ist, in die der Metallbecher 1 mit dem freien Ende seiner Becherwandung eintaucht.The arrangement, consisting of metal cup 1, PTC thermistor 2, Contact pin 6 and metal tube 8 together with contact springs 9, 9 are sealed by an insulating disc 10 facing away from the outside of the cup bottom. The plastic disc 10 is, for. B. designed in a preferred embodiment quasi as a plastic cup, in the optionally raised edge region 10, an annular groove 11 is embedded, in which the metal cup 1 dips with the free end of its cup wall.

Die gesamte Vorrichtung, ausgenommen der Becheraußenboden und Teile des Kontaktstifts 6 und des Metallrohres 8, ist schließlich mit hochtemperaturbeständigem Kunststoff 12 umspritzt, unter dessen Wirkung das Becherinnere zusätzlich gegen atmosphärische Einflüsse geschützt ist und zudem die einzelnen Elemente der Vorrichtung in ihrer vorgegebenen Lage gehalten werden.The entire device, with the exception of the outer cup base and parts of the contact pin 6 and the metal tube 8, is finally encapsulated with high-temperature-resistant plastic 12, under the effect of which the inside of the cup is additionally protected against atmospheric influences and, moreover, the individual elements of the device are held in their predetermined position.

Claims (4)

  1. Device for heating and evaporating media, in particular suitable for operation in liquids and gases, having a metal plate and a disc with positive temperature coefficient of resistance which makes electrical contact by means of its first frontal face with the metal plate in a thermally conducting manner and which is coated on both frontal faces with annular electrodes, characterized in that the metal plate is a metal can (1), in that the first frontal face of the disc with positive temperature coefficient of resistance is bonded by means of electrically and thermally conducting adhesive (3) to the internal surface of the base of the can, in that, viewed in the thickness direction, the disc with positive temperature coefficient of resistance (2) is preferably perforated in the centre, in that a metallic contact pin (6) whose first end is connected firmly and in an electrically conducting manner to the internal surface of the base of the can and whose second end extends above the metal can (1) is passed through the perforation (2a) in an electrically insulating manner, in that there is pushed onto the free-standing part of the contact pin a metal tube which is electrically insulated from the contact pin (6) and which supports, at the end adjacent to the disc with positive temperature coefficient of resistance (2), contact springs (9, 9) which rest against the electrode (4) of the free frontal face of the positive temperature coefficient disc (2), in that a disc of insulating material (10), which is placed against the frontal face of the can wall, is pushed onto the metal tube (8), and in that the circumferential surface of the metal can (1) and the free frontal faces of the insulating disc (10) are enclosed in high-temperature-resistant plastic (12) in such a way that the free frontal face of the metal plate (1) and the contact parts (6, 8) brought out opposite thereto are free of plastic.
  2. Device according to Claim 1, characterized in that the disc of insulating material (10) is a plastic can and in that an annular groove (11), into which the free end of the can wall of the metal can (1) is lowered, is let into the free frontal faces of the can wall.
  3. Device according to Claim 1, characterized in that the contact pin (6) is coated with plastic.
  4. Device according to Claim 1, characterized in that a sleeve of insulating material (7) is pushed onto the contact pin (6).
EP91112266A 1990-07-23 1991-07-22 Device for heating and evaporating of media, particularly suitable for operation in liquids Expired - Lifetime EP0468419B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT9191112266T ATE105130T1 (en) 1990-07-23 1991-07-22 DEVICE FOR HEATING AND EVAPORATION OF MEDIA, PARTICULARLY SUITABLE FOR OPERATION IN LIQUIDS AND GASES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4023384 1990-07-23
DE4023384A DE4023384A1 (en) 1990-07-23 1990-07-23 DEVICE FOR HEATING AND EVAPORATING MEDIA, ESPECIALLY SUITABLE FOR OPERATION IN LIQUIDS AND GASES

Publications (2)

Publication Number Publication Date
EP0468419A1 EP0468419A1 (en) 1992-01-29
EP0468419B1 true EP0468419B1 (en) 1994-04-27

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ID=6410856

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Application Number Title Priority Date Filing Date
EP91112266A Expired - Lifetime EP0468419B1 (en) 1990-07-23 1991-07-22 Device for heating and evaporating of media, particularly suitable for operation in liquids

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EP (1) EP0468419B1 (en)
AT (1) ATE105130T1 (en)
DE (2) DE4023384A1 (en)
ES (1) ES2052304T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9208004U1 (en) * 1992-06-15 1992-08-27 Fritz Eichenauer Gmbh + Co. Kg Fabrik Elektrischer Spezialartikel, 6729 Hatzenbuehl, De
DE9416646U1 (en) * 1994-10-17 1994-12-15 Primavera Light Duftleuchten G Fragrance device with a hot plate

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2068825T3 (en) * 1987-04-21 1995-05-01 Tdk Corp PTC HEATING DEVICE.

Also Published As

Publication number Publication date
DE4023384A1 (en) 1992-01-30
DE59101489D1 (en) 1994-06-01
EP0468419A1 (en) 1992-01-29
ATE105130T1 (en) 1994-05-15
ES2052304T3 (en) 1994-07-01

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