DE3903649C1 - Electric flow heater for liquids - Google Patents

Electric flow heater for liquids

Info

Publication number
DE3903649C1
DE3903649C1 DE19893903649 DE3903649A DE3903649C1 DE 3903649 C1 DE3903649 C1 DE 3903649C1 DE 19893903649 DE19893903649 DE 19893903649 DE 3903649 A DE3903649 A DE 3903649A DE 3903649 C1 DE3903649 C1 DE 3903649C1
Authority
DE
Germany
Prior art keywords
heater
plastic
metal
tubular
embedded
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
DE19893903649
Other languages
German (de)
Inventor
Erich 7200 Tuttlingen De 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 & Hillinger 7200 Tuttlingen De GmbH
Original Assignee
Tuerk & Hillinger 7200 Tuttlingen De 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 & Hillinger 7200 Tuttlingen De GmbH filed Critical Tuerk & Hillinger 7200 Tuttlingen De GmbH
Priority to DE19893903649 priority Critical patent/DE3903649C1/en
Application granted granted Critical
Publication of DE3903649C1 publication Critical patent/DE3903649C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/40Heating elements having the shape of rods or tubes
    • H05B3/54Heating elements having the shape of rods or tubes flexible
    • H05B3/58Heating hoses; Heating collars
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/142Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using electric energy supply

Abstract

Electric flow heaters, in which a helical, metal-cased tubular heater is embedded in a plastic jacket which forms the flow tube, show a relatively high susceptibility for overheating, caused by calcification. The overheating can in this case go so far that it results in charring of the plastic. It is therefore the object of the present invention to create a flow heater which on the one hand has the advantages of the known plastic design, in which, however, on the other hand the plastic parts of the heater are prevented from being damaged, or even destroyed, by overheating. This object is achieved according to the invention in that the helical tubular heater (1) is surrounded by a metal envelope (2) and is embedded, together with said envelope, in the plastic casing (4). <IMAGE>

Description

Die Erfindung betrifft einen elektrischen Durchlauferhitzer ge­ mäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an electric water heater ge according to the preamble of claim 1.

Die Erfahrung hat gezeigt, daß es bei thermischen Überlastungen des Rohrheizkörpers derartiger, beispielsweise durch die EP-OS 2 87 772 bekanntgewordener Durchlauferhitzer, zu so hohen Tempe­ raturen kommen kann, daß der Kunststoffmantel verkohlt.Experience has shown that there is thermal overload the tubular heater such, for example, by the EP-OS 2 87 772 instantaneous water heater, at such a high temperature can come that the plastic jacket charred.

Man ging deshalb auch schon dazu über, wie die DE-OS 35 34 754 offenbart, den gewendelten Rohrheizkörper auf ein Chrom-Nickel- Stahlrohr aufzulöten, das den Durchflußkanal bildet. Bei dieser Ausführungsart tritt wohl keine thermische Überhitzung auf, doch ist der technische Aufwand bei der Herstellung derartiger Durch­ lauferhitzer relativ hoch und verteuert damit den Erhitzer ganz erheblich.One therefore went over to it, such as DE-OS 35 34 754 discloses the coiled tubular heater on a chrome-nickel Solder steel pipe that forms the flow channel. At this No thermal overheating occurs, however is the technical effort in the production of such through The heater is relatively high, making the heater more expensive considerably.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Durchlaufer­ hitzer für Flüssigkeiten zu schaffen, der die Vorteile der ko­ rosionsfesten und preiswerten Ausführungsart in Kunststoff auf­ weist, bei dem aber andererseits schädliche Überhitzungen insbe­ sondere der Kunststoffteile sicher vermieden werden.The present invention has for its object a pass to create a heater for liquids that takes advantage of knockout corrosion-resistant and inexpensive design in plastic points, but in particular harmful overheating special plastic parts can be safely avoided.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Patent­ anspruchs 1 gelöst.This object is achieved through the characteristic features of the patent claim 1 solved.

Dieser neuartige Durchlauferhitzer ist mit nur geringem tech­ nischem Mehraufwand herstellbar, korrosionsfest und relativ preiswert, da die mittels der Metallumhüllung erzielte Abschir­ mung der Kunststoffteile gegen den Heizkörper, es außerdem er­ laubt, Kunststoffe mit geringerer Warmfestigkeit, also preiswer­ tere Kunststoffe zu verwenden.
This novel instantaneous water heater can be produced with only little additional technical expenditure, is corrosion-resistant and relatively inexpensive, since the shielding of the plastic parts against the radiator achieved by means of the metal sheathing also allows it to use plastics with lower heat resistance, that is, cheaper plastics.

Der Gegenstand der Erfindung ist in einem Ausführungsbeispiel in der Zeichnung dargestellt und nachfolgend beschrieben.The object of the invention is in one embodiment shown in the drawing and described below.

Der dargestellte Durchlauferhitzer besteht aus einem gewen­ delten Rohrheizkörper 1 an sich bekannter Art, einer Blech­ manschette 2, die die Windungen 3 des Rohrheizkörpers 1 umgibt und aus einem Kunststoffmantel 4, in dem der Rohrheizkörper 1 mit der Blechmanschette 2 eingebettet sind.The water heater shown consists of a selected tubular heater 1 of a known type, a sheet metal sleeve 2 which surrounds the windings 3 of the tubular heater 1 and a plastic jacket 4 in which the tubular heater 1 with the sheet metal sleeve 2 are embedded.

Der Rohrheizkörper 1 ist mit zwei Anschlüssen 5 und 6 aus dem Kunststoffmantel herausgeführt. Die zum Anschluß des Durchlauf­ erhitzers erforderlichen Schlauchanschlüsse 7 und 8 sind un­ mittelbar am Kunststoffmantel angeformt.The tubular heater 1 is led out of the plastic jacket with two connections 5 and 6 . The hose connections 7 and 8 required to connect the continuous flow heater are molded directly onto the plastic jacket.

Bei der Herstellung des beschriebenen Durchlauferhitzers wird so vorgegangen, daß der gewendelte Rohrheizkörper 1 mit der Blechmanschette 2 umgeben und letztere mit dem Rohrheizkörper verpreßt wird, derart, daß die Blechmanschette 2 die Windungen 3 des Rohrheizkörpers 1 umschließt. Dieses derart vorgefertigte Bauteil 1, 2 wird nun in ein entsprechend ausgelegtes Kunststoff­ werkzeug eingesetzt und mit einem warmfesten Kunststoff um­ spritzt, so daß der in der Zeichnung ersichtliche Mantel 4 mit den Schlauchanschlüssen 7 und 8 entsteht.In the preparation of the water heater described the procedure is such that the helical tubular heating element 1 surrounded with the metal sleeve 2 and the latter is pressed with the heating element, such that the sheet sleeve 2 encloses the windings 3 of the tubular heater. 1 This prefabricated component 1, 2 is now used in a suitably designed plastic tool and injects with a heat-resistant plastic, so that the sheath 4 shown in the drawing with the hose connections 7 and 8 is formed.

Die durch die Blechmanschette 2 gebildete wesentliche Vergrö­ ßerung der Oberfläche des Rohrheizkörpers verhindert weitge­ hend eine thermische Überlastung des Kunststoffmantels 4. Die beiden Anschlußenden 7 und 8 des Erhitzers bleiben unbeheizt, so daß auch hier keine Überhitzung entstehen kann.The substantial enlargement of the surface of the tubular heater formed by the sheet metal sleeve 2 largely prevents thermal overloading of the plastic jacket 4 . The two connection ends 7 and 8 of the heater remain unheated, so that overheating cannot occur here either.

Wie schon erwähnt, können bei dieser erfindungsgemäßen Ausfüh­ rungsart des Erhitzers relativ preiswerte Kunststoffe einge­ setzt werden, was wiederum eine erhebliche Verbilligung des Erhitzers mit sich bringt.As already mentioned, in this embodiment according to the invention type of heating relatively inexpensive plastics  be set, which in turn significantly reduces the cost of the Heater brings with it.

Für die Anbringung eines Reglers, oder Temperaturbegrenzers 9 am Durchlauferhitzer ist ein Metallbügel 10, der unmittelbaren Kontakt hat mit dem Rohrheizkörper 1, mit in den Kunststoffman­ tel 4 eingespritzt.For the attachment of a controller, or temperature limiter 9 on the water heater is a metal bracket 10 , which has direct contact with the tubular heater 1 , with 4 injected in the Kunststoffman tel.

Claims (3)

1. Elektrischer Durchlauferhitzer für Flüssigkeiten, beste­ hend aus einem metallummantelten Rohrheizkörper, der in gewendelter Form in einem rohrförmigen Mantel aus Kunst­ stoff, der den Durchflußkanal bildet, eingebettet ist, dadurch gekennzeichnet, daß der Rohrheizkörper (1) mit einer Umhüllung (2) aus Metall umgeben ist und mit dieser zusammen im Kunststoffmantel (4) eingebettet ist.1. Electric water heater for liquids, best starting from a metal-coated tubular heater, which is embedded in a helical shape in a tubular jacket made of plastic, which forms the flow channel, characterized in that the tubular heater ( 1 ) with a covering ( 2 ) Metal is surrounded and is embedded together with this in the plastic jacket ( 4 ). 2. Durchlauferhitzer nach Patentanspruch 1, dadurch gekennzeichnet, daß die Metallumhüllung (2) als Blechmanschette ausgebildet ist, die mit dem Rohrheizkörper (1) derart verpreßt ist, daß dessen einzelne Windungen (3) teilweise von der Man­ schette umfaßt werden.2. instantaneous water heater according to claim 1, characterized in that the metal sheath ( 2 ) is designed as a sheet metal sleeve which is pressed with the tubular heater ( 1 ) such that its individual turns ( 3 ) are partially covered by the cuff. 3. Durchlauferhitzer nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß ein zum Befestigen eines Temperaturbegrenzers (9) geeig­ neter Bügel (10) od. dgl. aus Metall mit im Kunststoff­ mantel (4) eingebettet ist, derart, daß der Bügel (10) unmittelbaren Kontakt hat mit dem Rohrheizkörper (1).3. instantaneous water heater according to claims 1 and 2, characterized in that a suitable for attaching a temperature limiter ( 9 ) suitable bracket ( 10 ) or the like. Metal with plastic casing ( 4 ) is embedded such that the bracket ( 10 ) has direct contact with the tubular heater ( 1 ).
DE19893903649 1989-02-08 1989-02-08 Electric flow heater for liquids Expired - Fee Related DE3903649C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893903649 DE3903649C1 (en) 1989-02-08 1989-02-08 Electric flow heater for liquids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893903649 DE3903649C1 (en) 1989-02-08 1989-02-08 Electric flow heater for liquids

Publications (1)

Publication Number Publication Date
DE3903649C1 true DE3903649C1 (en) 1990-04-12

Family

ID=6373606

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893903649 Expired - Fee Related DE3903649C1 (en) 1989-02-08 1989-02-08 Electric flow heater for liquids

Country Status (1)

Country Link
DE (1) DE3903649C1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9301729U1 (en) * 1993-02-09 1993-04-01 E.G.O. Elektro-Geraete Blanc U. Fischer, 7519 Oberderdingen, De
DE4233676A1 (en) * 1992-10-07 1994-04-14 Ego Elektro Blanc & Fischer Electric radiator for media, especially flow heaters
DE102004004821A1 (en) * 2004-01-30 2005-08-18 BSH Bosch und Siemens Hausgeräte GmbH Coffee machine with water heater
DE102004004816A1 (en) * 2004-01-30 2005-08-25 BSH Bosch und Siemens Hausgeräte GmbH Coffee machine with water heater
ITPD20080317A1 (en) * 2008-10-31 2010-05-01 Astrel Srl HEATING DEVICE FOR FLUIDS IN PIPES, PARTICULARLY FOR WATER HEATING FOR WHIRLPOOLS AND SIMILAR TANKS
DE102009024059A1 (en) * 2009-06-05 2010-12-09 Eichenauer Heizelemente Gmbh & Co. Kg Flow heater, has embossments that are formed together with surface of casing tube of inner tubular heating element, where embossments are formed as semi-circular embossments along cross section planes of tubular heating element
WO2017003402A1 (en) * 2015-06-30 2017-01-05 Публичное Акционерное Общество "Компания Росток" Heater
DE102017003416A1 (en) * 2017-04-07 2018-10-11 Stiebel Eltron Gmbh & Co. Kg Electric water heating system
WO2020239271A1 (en) * 2019-05-31 2020-12-03 Valeo Thermal Commercial Vehicles Germany GmbH Electric heating device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1559261A (en) * 1976-12-22 1980-01-16 Philips Nv Heating apparatus for water
DE3120682A1 (en) * 1981-05-23 1982-12-16 Horst 5241 Elben Hammes Electrically heated forced-flow continuous heater
DE3307962A1 (en) * 1983-03-07 1984-09-20 Siemens AG, 1000 Berlin und 8000 München Electrical continuous-flow heater for a drinks dispenser
DE3534754A1 (en) * 1985-09-28 1987-04-02 Bauknecht Hausgeraete Electric continuous flow heater for domestic appliances
EP0287772A1 (en) * 1987-02-24 1988-10-26 I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini Heating element for household electrical appliances

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1559261A (en) * 1976-12-22 1980-01-16 Philips Nv Heating apparatus for water
DE3120682A1 (en) * 1981-05-23 1982-12-16 Horst 5241 Elben Hammes Electrically heated forced-flow continuous heater
DE3307962A1 (en) * 1983-03-07 1984-09-20 Siemens AG, 1000 Berlin und 8000 München Electrical continuous-flow heater for a drinks dispenser
DE3534754A1 (en) * 1985-09-28 1987-04-02 Bauknecht Hausgeraete Electric continuous flow heater for domestic appliances
EP0287772A1 (en) * 1987-02-24 1988-10-26 I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini Heating element for household electrical appliances

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4233676A1 (en) * 1992-10-07 1994-04-14 Ego Elektro Blanc & Fischer Electric radiator for media, especially flow heaters
DE9301729U1 (en) * 1993-02-09 1993-04-01 E.G.O. Elektro-Geraete Blanc U. Fischer, 7519 Oberderdingen, De
DE102004004816B4 (en) 2004-01-30 2021-10-28 BSH Hausgeräte GmbH Coffee machine with water heater
DE102004004821A1 (en) * 2004-01-30 2005-08-18 BSH Bosch und Siemens Hausgeräte GmbH Coffee machine with water heater
DE102004004816A1 (en) * 2004-01-30 2005-08-25 BSH Bosch und Siemens Hausgeräte GmbH Coffee machine with water heater
US8511222B2 (en) 2004-01-30 2013-08-20 Bsh Bosch Und Siemens Hausgeraete Gmbh Coffee machine comprising a continuous heater
US8528467B2 (en) 2004-01-30 2013-09-10 Bsh Bosch Und Siemens Hausgeraete Gmbh Coffee machine with a continuous flow heater
ITPD20080317A1 (en) * 2008-10-31 2010-05-01 Astrel Srl HEATING DEVICE FOR FLUIDS IN PIPES, PARTICULARLY FOR WATER HEATING FOR WHIRLPOOLS AND SIMILAR TANKS
DE102009024059A1 (en) * 2009-06-05 2010-12-09 Eichenauer Heizelemente Gmbh & Co. Kg Flow heater, has embossments that are formed together with surface of casing tube of inner tubular heating element, where embossments are formed as semi-circular embossments along cross section planes of tubular heating element
WO2017003402A1 (en) * 2015-06-30 2017-01-05 Публичное Акционерное Общество "Компания Росток" Heater
DE102017003416A1 (en) * 2017-04-07 2018-10-11 Stiebel Eltron Gmbh & Co. Kg Electric water heating system
WO2020239271A1 (en) * 2019-05-31 2020-12-03 Valeo Thermal Commercial Vehicles Germany GmbH Electric heating device
CN113994155A (en) * 2019-05-31 2022-01-28 法雷奥热商业车辆德国有限公司 Electric heater
KR20220017935A (en) * 2019-05-31 2022-02-14 발레오 써멀 커머셜 비히클스 저머니 게엠베하 electric heating device
CN113994155B (en) * 2019-05-31 2023-05-23 法雷奥热商业车辆德国有限公司 Electric heater
KR102628873B1 (en) 2019-05-31 2024-01-25 발레오 써멀 커머셜 비히클스 저머니 게엠베하 electric 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
8363 Opposition against the patent
8365 Fully valid after opposition proceedings
8320 Willingness to grant licenses declared (paragraph 23)
8339 Ceased/non-payment of the annual fee