DE4325434C1 - Electric flow-type heater (flow heater) having PTC heating elements - Google Patents

Electric flow-type heater (flow heater) having PTC heating elements

Info

Publication number
DE4325434C1
DE4325434C1 DE19934325434 DE4325434A DE4325434C1 DE 4325434 C1 DE4325434 C1 DE 4325434C1 DE 19934325434 DE19934325434 DE 19934325434 DE 4325434 A DE4325434 A DE 4325434A DE 4325434 C1 DE4325434 C1 DE 4325434C1
Authority
DE
Germany
Prior art keywords
flow
heater
ptc elements
heat
heating elements
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 - Fee Related
Application number
DE19934325434
Other languages
German (de)
Inventor
Erich Hillinger
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.)
Tuerk and Hillinger GmbH
Original Assignee
Tuerk and Hillinger 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 Tuerk and Hillinger GmbH filed Critical Tuerk and Hillinger GmbH
Priority to DE19934325434 priority Critical patent/DE4325434C1/en
Application granted granted Critical
Publication of DE4325434C1 publication Critical patent/DE4325434C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • H05B3/148—Silicon, e.g. silicon carbide, magnesium silicide, heating transistors or diodes
    • 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
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids

Abstract

In electric flow-type heaters equipped with PTC elements, it is extremely important that heat dissipation from the PTC elements takes place evenly on both sides and is not hindered by insulating films. It is therefore the object of the present invention to design a flow-type heater in which, in a manner known per se, the PTC elements are arranged between two extruded profile parts accommodating the continuous tube (continuous-flow tube) and are pressed against these extruded profile parts by means of clamps, in such a way that, without impeding the making of reliable electric contacts, heat can flow between the PTC elements and the continuous tube without being obstructed to any great extent. This object is achieved in that the continuous tube (1) is provided on its circumference with a coating (8) made of a heat-resistant insulating material. <IMAGE>

Description

Die Erfindung betrifft einen mit PTC-Heizelementen ausge­ rüsteten Durchlauferhitzer für flüssige Medien gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a PTC heating elements equipped flow heater for liquid media according to the Preamble of claim 1.

Bei derartigen Durchlauferhitzern ist es sehr wichtig, daß eine beiderseitige Wärmeabfuhr von den PTC-Elementen und eine einwandfreie elektrische Kontaktierung derselben er­ reicht und aufrechterhalten wird.With such water heaters, it is very important that mutual heat dissipation from the PTC elements and proper electrical contacting of the same is enough and maintained.

Ein Durchlauferhitzer dieser Art wird beispielsweise durch die DE-PS 38 10 051 C2 offenbart. Hier sind mehrere PTC-Ele­ mente zwischen zwei Rohrleitungen angeordnet und dieser Auf­ bau mittels Klammern fixiert. Die PTC-Elemente selbst sind gegenüber den Rohrleitungen mittels Isolierfolien elektrisch isoliert. Diese Isolierfolien hemmen jedoch auch den Wärme­ fluß zwischen den PTC-Elementen und den Rohrleitungen.A continuous flow heater of this type is used, for example DE-PS 38 10 051 C2 discloses. Here are several PTC-Ele elements arranged between two pipes and this on construction fixed with brackets. The PTC elements themselves are electrically against the pipelines using insulating foils isolated. However, these insulating foils also inhibit heat flow between the PTC elements and the pipes.

Eine weitere Ausführungsart solcher Durchlauferhitzer ist in der DE-PS 2 91 200 C2 beschrieben. Auch bei diesem Erhitzer hemmen Isolierschichten den vollen Wärmeübergang zwischen den PTC-Elementen und den Rohrleitungen.Another embodiment of such a water heater is in DE-PS 2 91 200 C2 described. Even with this heater inhibit insulating layers the full heat transfer between the PTC elements and the pipes.

Durch das DE-GM 87 01 656 U1 ist außerdem ein Durchlaufer­ hitzer bekannt, bei dem die PTC-Elemente einschließlich der Kontaktschienen mit einer Isolierfolie umhüllt sind. Dieser Aufbau ist dann in eine seitlich des Durchflußkanals angeord­ neten Nut eingesetzt. Diese Ausführungsart weist wohl rela­ tiv große Anlageflächen zwischen den PTC-Elementen und dem den Durchflußkanal enthaltenden Strangpreßteil auf, doch ist infolge der unterschiedlichen Querschnitte des Strangpreß­ teils der Wärmeübergang zum zu beheizenden Medium nicht opti­ mal.The DE-GM 87 01 656 U1 is also a pass heater known in which the PTC elements including the Contact rails are covered with an insulating film. This Structure is then arranged in a side of the flow channel Neten groove used. This embodiment probably shows rela tiv large contact areas between the PTC elements and the  the extrusion containing the flow channel, but is due to the different cross sections of the extrusion partly the heat transfer to the medium to be heated is not opti times.

Der Erfindung liegt die Aufgabe zugrunde, einen Durchlauf­ erhitzer zu schaffen, bei dem ohne Vernachlässigung des einwandfreien elektrischen Kontakts, der Wärmefluß zwi­ schen den PTC-Elementen und den das durchfließende Medium führenden Rohrteilen ohne nennenswerte Behinderung statt­ finden kann.The invention has for its object a run to create heaters in which without neglecting the perfect electrical contact, the heat flow between the PTC elements and the medium flowing through leading pipe parts without significant disability Can be found.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. This task is characterized by the characteristics of the Claim 1 solved.  

Bei diesem neuartigen Durchlauferhitzer erfolgt die Wärme­ ableitung bzw. der Wärmefluß über große Kontaktflächen und gestaltet sich dementsprechend wesentlich günstiger, der elektrische Kontakt der Zuführung zu den PTC-Elementen ist einwandfrei und betriebssicher, wobei das Durchlaufrohr elektrisch neutral bleibt.The heat comes from this new type of instantaneous water heater dissipation or the heat flow over large contact areas and is accordingly much cheaper, the electrical contact of the feed to the PTC elements flawless and reliable, with the flow tube remains electrically neutral.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und nachfolgend beschrie­ ben. Es zeigtAn embodiment of the invention is shown in the drawing and described below ben. It shows

Fig. 1 den Durchlauferhitzer, teilweise im Längs­ schnitt, und Fig. 1 the water heater, partially in longitudinal section, and

Fig. 2 einen Querschnitt in der Ebene II : II der Fig. 1 in größerem Maßstab. Fig. 2 shows a cross section in the plane II: II of Fig. 1 on a larger scale.

Der dargestellte Durchlauferhitzer besteht aus zwei die beiden Schenkel eines haarnadelförmig gebogenen Durchlauf­ rohres 1 aufnehmenden Aluminium-Strangprofilteilen 3 und 4 mit je einer ebenen Auflagefläche 5 sowie aus zwei oder meh­ reren PTC-Heizelementen 6, die zwischen den beiden Profil­ teilen 3 und 4 angeordnet sind, so, daß letztere mit ihren ebenen Auflageflächen 5 gegen die PTC-Heizelemente 6 satt anliegen.The water heater shown consists of two, the two legs of a hairpin-shaped bent flow tube 1 accommodating aluminum extruded profile parts 3 and 4, each with a flat bearing surface 5 as well as of two or meh reren PTC heating elements 6, which are split between the two profile arranged 3 and 4 , so that the latter lie snugly against the PTC heating elements 6 with their flat bearing surfaces 5 .

Dieser Aufbau 1 bis 6 wird durch zwei oder mehrere kräfti­ ge Federklammern 7, die diesen Aufbau insgesamt umfassen, zusammengehalten. Die erforderliche elektrische Isolierung erfolgt dadurch, daß das Durchlaufrohr 1 auf seinem gesam­ ten Umfang mit einer temperaturbeständigen Kunststoffbe­ schichtung 8 versehen ist. Diese Beschichtung kann durch Aufspritzen oder im Tauchverfahren hergestellt werden oder aber durch Überschieben eines dünnen Kunststoffschlauchs. This structure 1 to 6 is held together by two or more forceful ge spring clips 7 , which comprise this structure as a whole. The required electrical insulation takes place in that the flow tube 1 is provided on its entire th circumference with a temperature-resistant plastic coating 8 . This coating can be produced by spraying or in the immersion process or by sliding a thin plastic tube over it.

Beim Zusammenbau des Erhitzers wird zunächst das isolier­ te Durchlaufrohr 1 in die Bohrungen der Strangprofiltei­ le 3 und 4 eingeschoben und dann diese Teile 3, 4 und 1 fest miteinander verpreßt, so daß eine innige, den Wärme­ übergang begünstigende, Verbindung entsteht.When assembling the heater, first the isolate flow tube 1 is inserted into the bores of the extruded sections 3 and 4 and then these parts 3 , 4 and 1 are firmly pressed together, so that an intimate connection which favors heat transfer is produced.

Wie schon erwähnt, verbinden die Federklammern 7 die be­ schriebenen Teile zu einem geschlossenen System. Die Iso­ lierung dieser Klammern 7 erfolgt durch eine zwischen die Profilteile 3, 4 und die Klammer 7 eingelegte Isolier­ folie 9, beispielsweise aus Kapton.As already mentioned, the spring clips 7 connect the parts to be written into a closed system. The insulation of these brackets 7 is carried out by an insulating film 9 inserted between the profile parts 3 , 4 and the bracket 7 , for example from Kapton.

Zum elektrischen Anschluß der PTC-Elemente 6 des Durchlauf­ erhitzers dienen zwei Flachstecker 10, die an den Profil­ teilen 3 und 4 angeschweißt oder auf andere Art befestigt sind.For the electrical connection of the PTC elements 6 of the continuous-flow heater, two tabs 10 are used , which parts 3 and 4 are welded to the profile or fastened in some other way.

Wesentlich an dem beschriebenen Aufbau ist, daß die elek­ trische Isolierung erst am Durchflußrohr vorgenommen wird. Die erzeugte Wärme wird daher großflächig über den gesam­ ten Umfang und Länge des Durchlaufrohres übertragen und damit bestmöglich auf das zu erwärmende Medium.It is essential to the structure described that the elec trical insulation is made only on the flow tube. The heat generated is therefore large over the entire transfer the circumference and length of the flow tube and thus as best as possible on the medium to be heated.

Claims (2)

1. Elektrischer Durchlauferhitzer mit PTC-Heizelementen, die zwischen zwei das Durchlaufrohr aufnehmenden Strangprofilteilen angeordnet und mittels Federklam­ mern an diese angepreßt sind, dadurch gekennzeichnet, daß das Durchlaufrohr (1) an seinem Umfang mit einer Beschichtung (8) aus wärmebeständigem Isolierstoff versehen und mit dem zugeordneten Strangprofilteil (4) verpreßt ist.1. Electric instantaneous water heater with PTC heating elements which are arranged between two extruded profile parts receiving the continuous tube and are pressed against them by means of spring clips, characterized in that the continuous tube ( 1 ) is provided on its circumference with a coating ( 8 ) made of heat-resistant insulating material and with the associated extruded profile part ( 4 ) is pressed. 2. Durchlauferhitzer nach Anspruch 1, dadurch gekennzeichnet, daß zwischen den beiden Strangprofilteilen (3 und 4) und einer diese umfassenden Federklammer (7) eine Iso­ lierfolie (9) eingelegt ist.2. instantaneous water heater according to claim 1, characterized in that between the two extruded sections ( 3 and 4 ) and a spring clip ( 7 ) encompassing this, an insulating film ( 9 ) is inserted.
DE19934325434 1993-07-29 1993-07-29 Electric flow-type heater (flow heater) having PTC heating elements Expired - Fee Related DE4325434C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19934325434 DE4325434C1 (en) 1993-07-29 1993-07-29 Electric flow-type heater (flow heater) having PTC heating elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19934325434 DE4325434C1 (en) 1993-07-29 1993-07-29 Electric flow-type heater (flow heater) having PTC heating elements

Publications (1)

Publication Number Publication Date
DE4325434C1 true DE4325434C1 (en) 1995-01-12

Family

ID=6493977

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19934325434 Expired - Fee Related DE4325434C1 (en) 1993-07-29 1993-07-29 Electric flow-type heater (flow heater) having PTC heating elements

Country Status (1)

Country Link
DE (1) DE4325434C1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20120821U1 (en) * 2001-12-21 2002-05-08 Tuerk & Hillinger Gmbh Electric heater for absorption cooling systems
EP2677246A1 (en) * 2012-06-22 2013-12-25 SEKA Schutzbelüftung GmbH Heating device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2912000C2 (en) * 1979-03-27 1982-03-11 MEKU Metall- und Kunststoffverarbeitungs-GmbH & Co KG, 7735 Dauchingen Device for preheating fuel oil in front of the nozzle of a burner
DE8701656U1 (en) * 1987-02-04 1987-03-19 Tuerk & Hillinger Gmbh, 7200 Tuttlingen, De
DE3810051C2 (en) * 1988-03-25 1990-01-04 Tuerk & Hillinger Gmbh, 7200 Tuttlingen, De

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2912000C2 (en) * 1979-03-27 1982-03-11 MEKU Metall- und Kunststoffverarbeitungs-GmbH & Co KG, 7735 Dauchingen Device for preheating fuel oil in front of the nozzle of a burner
DE8701656U1 (en) * 1987-02-04 1987-03-19 Tuerk & Hillinger Gmbh, 7200 Tuttlingen, De
DE3810051C2 (en) * 1988-03-25 1990-01-04 Tuerk & Hillinger Gmbh, 7200 Tuttlingen, De

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20120821U1 (en) * 2001-12-21 2002-05-08 Tuerk & Hillinger Gmbh Electric heater for absorption cooling systems
EP2677246A1 (en) * 2012-06-22 2013-12-25 SEKA Schutzbelüftung GmbH Heating device

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Legal Events

Date Code Title Description
8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8320 Willingness to grant licenses declared (paragraph 23)
8339 Ceased/non-payment of the annual fee