DE4212074C1 - Electric continuous flow meter e.g. for coffee machine - has tubular heaters pressed so that walls of flow tube have recesses altering cross-section - Google Patents

Electric continuous flow meter e.g. for coffee machine - has tubular heaters pressed so that walls of flow tube have recesses altering cross-section

Info

Publication number
DE4212074C1
DE4212074C1 DE19924212074 DE4212074A DE4212074C1 DE 4212074 C1 DE4212074 C1 DE 4212074C1 DE 19924212074 DE19924212074 DE 19924212074 DE 4212074 A DE4212074 A DE 4212074A DE 4212074 C1 DE4212074 C1 DE 4212074C1
Authority
DE
Germany
Prior art keywords
flow tube
section
tubular heaters
recesses
walls
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
DE19924212074
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 DE19924212074 priority Critical patent/DE4212074C1/en
Priority to DE19924226767 priority patent/DE4226767C1/en
Application granted granted Critical
Publication of DE4212074C1 publication Critical patent/DE4212074C1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H05B3/42Heating elements having the shape of rods or tubes non-flexible

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)

Abstract

The electric continuous flow heater for liquid media, includes an extruded part, which has drillings parallel to each other, for accepting a flow tube and at least one sealed tubular heater. The extruded part (2) has tubular heaters (3, 4) embedded in it, are pressed together and deformed, such that the walls of the flow tube (1) running parallel to the tubular heaters (3, 4) have recesses (5) altering the cross section of the flow tube (1). ADVANTAGE - Provides longer operating time with relatively higher thermal loading. Flow heater has required mechanical strength and good heat transfer from tubular heaters to flowing media.

Description

Die Erfindung betrifft einen elektrischen Durchlauferhitzer zum Erwärmen flüssiger Medien, der gemäß dem Oberbegriff des Patent­ anspruchs 1 aus einem Strangpreßteil aus Aluminium oder einer, Aluminium enthaltenden Legierung besteht, das mehrere Bohrungen enthält zur Aufnahme eines Durchflußrohres und wenigstens eines verdichteten Rohrheizkörpers.The invention relates to an electric instantaneous water heater for Heating liquid media, according to the preamble of the patent claims 1 from an extruded part made of aluminum or one, Aluminum-containing alloy is made that has multiple holes contains for receiving a flow tube and at least one compressed tubular heater.

Durchlauferhitzer dieser Art sind beispielsweise in den DE-OS 25 21 754, DE-OS 25 52 139 und DE-OS 26 30 212 beschrieben. Diese Durchlauferhitzer eignen sich für kleinere Leistungen mit entsprechend niedrigen Temperaturen. Bei höheren Leistungen stei­ gen jedoch die Außentemperaturen solcher Systeme stark an, was nur in bestimmten Fällen, beispielsweise in der Anwendung für Kaffeemaschinen erwünscht ist.Water heaters of this type are, for example, in DE-OS 25 21 754, DE-OS 25 52 139 and DE-OS 26 30 212 described. These instantaneous water heaters are suitable for smaller capacities correspondingly low temperatures. At higher power levels However, the outside temperatures of such systems strongly increase what only in certain cases, for example in the application for Coffee machines is desired.

Dies gilt auch bezüglich des in der DE-OS 25 37 769 offenbarten Durchlauferhitzers.This also applies to what is disclosed in DE-OS 25 37 769 Instantaneous water heater.

Durch die DE-OS 29 42 523 ist es auch bekannt geworden, den, bzw. die Rohrheizkörper mit dem Strangpreßteil, das unmittelbar auch den Durchlaufkanal bildet, zu verpressen. Dieser Aufbau ist an sich relativ hoch belastbar, doch hat sich gezeigt, daß nach längeren Betriebszeiten, oder bei kurzzeitiger Überlastung, die mechanische Festigkeit abnimmt und somit auch der Kontaktdruck der Verpressung, der aber ausschlaggebend ist für den Wärmeüber­ gang. Dieses Problem entsteht vor allem auch dann, wenn der Durchflußkanal im Strangpreßteil mit einem zusätzlichen Rohr, bei­ spielsweise aus korrosionsbeständigem Werkstoff versehen ist.From DE-OS 29 42 523 it has also become known that the or the tubular heater with the extrusion, which immediately also forms the flow channel to press. This structure is on relatively resilient, but it has been shown that after longer operating times, or in the event of a brief overload, the mechanical strength decreases and thus also the contact pressure pressing, which is crucial for heat transfer corridor. This problem arises especially when the Flow channel in the extrusion with an additional tube, at is for example made of corrosion-resistant material.

Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, ei­ nen Durchlauferhitzer der beschriebenen Art zu schaffen, der auch nach langer Betriebszeit und relativ hoher thermischer Be­ lastung, die erforderliche mechanische Festigkeit und damit ei­ ne gute Wärmeübertragung von den Rohrheizkörpern zum durchströ­ menden Medium besitzt.The present invention is based on the object NEN to create a water heater of the type described even after a long period of operation and a relatively high thermal loading load, the required mechanical strength and thus egg ne good heat transfer from the tubular radiators to the flow owning medium.

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 nicht nur einfach zu fer­ tigen, sondern zeigt auch eine wesentlich verbesserte Wärmeüber­ tragung insgesamt zwischen den Rohrheizkörpern und dem zu erwär­ menden Medium, nicht zuletzt auch dadurch, daß die besondere Ge­ staltung des Durchflußrohres teilweise eine turbulente Strömung in letzterem bewirkt.This new water heater is not just easy to use term, but also shows a significantly improved heat transfer Total wear between the tubular radiators and the to be heated medium, not least because the special Ge design of the flow tube partially a turbulent flow effected in the latter.

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

Es zeigenShow it

Fig. 1 einen Längsschnitt durch den Durchlauf­ erhitzer und Fig. 1 is a longitudinal section through the pass heater and

Fig. 2 einen Querschnitt in der Ebene II-II der Fig. 1. Fig. 2 shows a cross section in the plane II-II in FIG. 1.

Der dargestellte Durchlauferhitzer besteht aus einem Durchlauf­ rohr 1, beispielsweise aus CrNi, und einem Strangpreßteil 2, das das Durchlaufrohr 1 und zwei verdichtete Rohrheizkörper 3 und 4 in sich aufnimmt.The water heater shown consists of a flow tube 1 , for example made of CrNi, and an extrusion 2 , which contains the flow tube 1 and two compressed tubular heaters 3 and 4 .

Die genannten Teile 1 bis 4 werden nach ihrem Zusammenbau einem quer zur Längsachse des Erhitzers mit hohem Druck wirkenden Preßvorgang unterzogen, bei dem auf ganzer Länge des Strangpreß­ teils 2 die beiden, in diesem Strangpreßteil 2 befindlichen Rohr­ heizkörper 3 und 4 gegen das Durchflußrohr 1 gedrückt werden, so, daß letzteres, zuerst mit kreisrundem Querschnitt, jetzt zwei sich gegenüberliegende, längs des Rohres verlaufende, tiefe Einbucht­ ungen 5 erhält und so ein in Fig. 2 dargestelltes Profil an­ nimmt.The parts 1 to 4 mentioned are subjected to a pressing process acting transversely to the longitudinal axis of the heater with high pressure after their assembly, in which part of the entire length of the extrusion part 2, the two heating element 3 and 4 located in this extrusion part 2, are pressed against the flow tube 1 are so that the latter, first with a circular cross-section, now receives two opposing, along the tube, deep indentations 5 and thus takes on a profile shown in Fig. 2.

Durch dieses Pressen wird ein außerordentlich fester Formschluß zwischen den Rohrheizkörpern 3 und 4, dem Durchlaufrohr 1 und dem diese Teile umgebenden Strangpreßteil 2 erreicht, was wiederum ei­ nen guten Wärmeübergang, vor allem in hohen Temperaturbereichen bewirkt. Außerdem erhöht sich dadurch auch die mechanische Festig­ keit des Durchlauferhitzers insgesamt. Vor dem Preßvorgang wird zweckmäßigerweise ein Dorn mit entsprechendem Querschnitt in das Durchlaufrohr eingeschoben, so daß immer das gewünschte Profil erreicht wird.By this pressing an extraordinarily firm form fit between the tubular heaters 3 and 4 , the flow tube 1 and the extrusion 2 surrounding these parts is achieved, which in turn causes a good heat transfer, especially in high temperature ranges. It also increases the overall mechanical strength of the instantaneous water heater. Before the pressing process, a mandrel with a corresponding cross section is expediently inserted into the flow tube, so that the desired profile is always achieved.

Das Strangpreßteil kann nicht nur aus wärmebeständigen Aluminium­ legierungen, sondern auch aus wärmebeständigem Messing hergestellt werden. Ebenso ist auch das Durchlaßrohr nicht an bestimmte Werk­ stoffe gebunden.The extruded part can not only be made of heat-resistant aluminum alloys, but also made of heat-resistant brass will. Likewise, the passage pipe is not to certain works fabrics bound.

Claims (3)

1. Elektrischer Durchlauferhitzer für flüssige Medien, be­ stehend aus einem Strangpreßteil, das mehrere, zueinan­ der parallele Bohrungen zur Aufnahme eines Durchfluß­ rohres und wenigstens eines verdichteten Rohrheizkör­ pers aufweist und mit diesen Teilen bestückt ist, dadurch gekennzeichnet, daß das Strangpreßteil (2) und die in diesem eingelagerten Rohrheizkörper (3, 4) insgesamt so miteinander verformend verpreßt sind, daß die Wandung des Durchflußrohres (1) parallel zu den Rohrheizkörpern (3, 4) verlaufende, den Querschnitt des Durchflußrohres (1) verändernde Ein­ buchtungen (5) aufweist.1. Electric water heater for liquid media, be standing from an extrusion, which has several, zueinan the parallel holes for receiving a flow tube and at least one compressed Rohrheizkör pers and is equipped with these parts, characterized in that the extrusion ( 2 ) and the tubular heating elements ( 3 , 4 ) stored in this manner are pressed together so that the wall of the flow tube ( 1 ) runs parallel to the tubular heating elements ( 3 , 4 ), the cross-section of the flow tube ( 1 ) changes indentations ( 5 ) . 2. Elektrischer Durchlauferhitzer nach Anspruch 1, dadurch gekennzeichnet, daß die über das Strangpreßteil (2) überstehenden Enden des Durchflußrohres (1) in ihrem Querschnitt nicht von der Pressung verändert sind.2. Electrical instantaneous water heater according to claim 1, characterized in that the projecting ends of the flow tube ( 1 ) over the extrusion ( 2 ) are not changed in their cross section by the pressure. 3. Elektrischer Durchlauferhitzer nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß das Strangpreßteil (2) aus Messing besteht.3. Electric instantaneous water heater according to claims 1 and 2, characterized in that the extruded part ( 2 ) consists of brass.
DE19924212074 1992-04-10 1992-04-10 Electric continuous flow meter e.g. for coffee machine - has tubular heaters pressed so that walls of flow tube have recesses altering cross-section Expired - Lifetime DE4212074C1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19924212074 DE4212074C1 (en) 1992-04-10 1992-04-10 Electric continuous flow meter e.g. for coffee machine - has tubular heaters pressed so that walls of flow tube have recesses altering cross-section
DE19924226767 DE4226767C1 (en) 1992-04-10 1992-08-13 Mfg electric through-flow water heater - profiling flow pipe before insertion in extruded metal profile incorporating electric heating elements for improved heat transfer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924212074 DE4212074C1 (en) 1992-04-10 1992-04-10 Electric continuous flow meter e.g. for coffee machine - has tubular heaters pressed so that walls of flow tube have recesses altering cross-section

Publications (1)

Publication Number Publication Date
DE4212074C1 true DE4212074C1 (en) 1993-04-29

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19523047C1 (en) * 1995-06-24 1996-11-21 Tuerk & Hillinger Gmbh Electric through-flow heater for liquids
DE10059885C1 (en) * 2000-12-01 2002-07-04 Tuerk & Hillinger Gmbh Electric through-flow heater for fluid or gas has heating conductor carrier enclosing flattened central section of flow pipe
EP1321708A3 (en) * 2001-12-20 2004-04-21 Eichenauer Heizelemente GmbH & Co.KG Device for heating a liquid
DE102005004678B4 (en) * 2004-04-07 2007-09-13 Türk & Hillinger GmbH Starting and braking aid for electric drives
ITRM20080587A1 (en) * 2008-11-03 2010-05-04 I R C A S P A Ind Resistenz E Corazzate E HEAT EXCHANGER WITH THERMAL PROTECTION
US20130202279A1 (en) * 2010-07-12 2013-08-08 Bleckmann Gmbh & Co. Kg Dynamic flow heater
WO2016016857A1 (en) * 2014-07-31 2016-02-04 I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini Heat exchanger
US9648983B2 (en) 2012-05-15 2017-05-16 Bleckmann Gmbh & Co. Kg Helical dynamic flow through heater

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2521754A1 (en) * 1975-05-16 1976-11-25 Krups Robert HEATING DEVICE AND METHOD OF MANUFACTURING A HEATING DEVICE
DE2537769A1 (en) * 1975-08-25 1977-03-10 Elpag Ag Chur FLOW HEATER
DE2552139A1 (en) * 1975-11-20 1977-06-02 Elpag Ag Chur FLOW HEATER FOR COFFEE MACHINES OR OTHER ELECTRICALLY HEATED HOUSEHOLD APPLIANCES
DE2630212A1 (en) * 1976-07-05 1978-01-19 Westfael Kupfer & Messing Continuous flow heater for coffee making machine - has water duct and tubular space for heater made as integral unit
DE2942523A1 (en) * 1979-10-20 1981-04-30 Türk & Hillinger GmbH & Co, 7200 Tuttlingen Electric throughflow heater for water, oil etc. - has aluminium component with flow bores and parallel grooves for tubular heating elements

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2521754A1 (en) * 1975-05-16 1976-11-25 Krups Robert HEATING DEVICE AND METHOD OF MANUFACTURING A HEATING DEVICE
DE2537769A1 (en) * 1975-08-25 1977-03-10 Elpag Ag Chur FLOW HEATER
DE2552139A1 (en) * 1975-11-20 1977-06-02 Elpag Ag Chur FLOW HEATER FOR COFFEE MACHINES OR OTHER ELECTRICALLY HEATED HOUSEHOLD APPLIANCES
DE2630212A1 (en) * 1976-07-05 1978-01-19 Westfael Kupfer & Messing Continuous flow heater for coffee making machine - has water duct and tubular space for heater made as integral unit
DE2942523A1 (en) * 1979-10-20 1981-04-30 Türk & Hillinger GmbH & Co, 7200 Tuttlingen Electric throughflow heater for water, oil etc. - has aluminium component with flow bores and parallel grooves for tubular heating elements

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19523047C1 (en) * 1995-06-24 1996-11-21 Tuerk & Hillinger Gmbh Electric through-flow heater for liquids
DE19603418C1 (en) * 1995-06-24 1997-06-12 Tuerk & Hillinger Gmbh Electric through-flow heater for liquid medium
DE10059885C1 (en) * 2000-12-01 2002-07-04 Tuerk & Hillinger Gmbh Electric through-flow heater for fluid or gas has heating conductor carrier enclosing flattened central section of flow pipe
EP1321708A3 (en) * 2001-12-20 2004-04-21 Eichenauer Heizelemente GmbH & Co.KG Device for heating a liquid
DE102005004678B4 (en) * 2004-04-07 2007-09-13 Türk & Hillinger GmbH Starting and braking aid for electric drives
ITRM20080587A1 (en) * 2008-11-03 2010-05-04 I R C A S P A Ind Resistenz E Corazzate E HEAT EXCHANGER WITH THERMAL PROTECTION
WO2010060756A1 (en) * 2008-11-03 2010-06-03 I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini Heat exchanger with thermal protection
US20130202279A1 (en) * 2010-07-12 2013-08-08 Bleckmann Gmbh & Co. Kg Dynamic flow heater
US9664414B2 (en) * 2010-07-12 2017-05-30 Bleckmann Gmbh & Co. Kg Dynamic flow heater
US9648983B2 (en) 2012-05-15 2017-05-16 Bleckmann Gmbh & Co. Kg Helical dynamic flow through heater
WO2016016857A1 (en) * 2014-07-31 2016-02-04 I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini Heat exchanger
US10641521B2 (en) 2014-07-31 2020-05-05 I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini Heat exchanger

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