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-sectionInfo
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-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
- F24H1/12—Continuous-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
- F24H1/14—Continuous-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
- F24H1/142—Continuous-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
-
- 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
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
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)
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 |
Family
ID=6456543
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19924212074 Expired - Lifetime 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 |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4212074C1 (en) |
Cited By (8)
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)
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 |
-
1992
- 1992-04-10 DE DE19924212074 patent/DE4212074C1/en not_active Expired - Lifetime
Patent Citations (5)
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)
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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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 | ||
AG | Has addition no. |
Ref country code: DE Ref document number: 4226767 Format of ref document f/p: P |
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8363 | Opposition against the patent | ||
8365 | Fully valid after opposition proceedings | ||
8320 | Willingness to grant licenses declared (paragraph 23) | ||
R071 | Expiry of right | ||
R071 | Expiry of right |