EP2042821B1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP2042821B1
EP2042821B1 EP08016339.7A EP08016339A EP2042821B1 EP 2042821 B1 EP2042821 B1 EP 2042821B1 EP 08016339 A EP08016339 A EP 08016339A EP 2042821 B1 EP2042821 B1 EP 2042821B1
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EP
European Patent Office
Prior art keywords
heat
flow duct
receiving
receiving flow
medium
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Not-in-force
Application number
EP08016339.7A
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German (de)
French (fr)
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EP2042821A3 (en
EP2042821A2 (en
Inventor
Ali Ekbul
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP2042821A2 publication Critical patent/EP2042821A2/en
Publication of EP2042821A3 publication Critical patent/EP2042821A3/en
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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
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • 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
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • 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
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0015—Guiding means in water channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/028—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of at least one medium being helically coiled, the coils having a conical configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/022—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/026—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled and formed by bent members, e.g. plates, the coils having a cylindrical configuration

Definitions

  • the invention relates to a heat exchanger according to the preamble of
  • a heat exchanger for a heater is also from the DE 103 06 699 A1 known.
  • a substantially cylindrical base body which is produced by casting, executed with a heat-transferred wall.
  • the main body has inside a Schugaszug for serving as a heat-emitting medium heating gas.
  • the base body On the outside of the heat-transferring wall, the base body has a helical flow channel for serving as a heat-absorbing medium heating water.
  • the Schumacherkanal as a heat-absorbing flow channel is formed by a molded into the lateral surface of the heat-transferring wall trench, which is surrounded to the outside with a heat-transmitting wall enclosing a separate enclosure, so that the closed, helical Schumacherkanal results on the outer surface of the body ,
  • the Schumacherkanal is designed over its helical extent with locally different flow cross-sections such that the flow rate of flowing within the heat-receiving flow channel medium to the heat load of the corresponding portion of the heat-transferring wall is adaptable.
  • the EP 1136 771 A2 discloses a rectifier for a diffusion absorption plant having a triple heat exchanger having three adjacent channels of ammonia vapor and rich and poor ammonia water solution.
  • the triple heat exchanger is arranged around cooker tubes and has an inner and outer wall, the intermediate space preferably includes two further channels.
  • the heating water flowing in the heat-absorbing flow channel is circulated by a pump and supplied to external heat sinks.
  • the heating water is used, for example, the space heating or domestic hot water.
  • a heater control detects a corresponding drinking water heat demand and actuates a switching valve, which called the heated in the heat exchanger described above heating water via a separate drinking water heat exchanger, also called secondary heat exchanger directs.
  • the heating water cools in the secondary heat exchanger and flows back into the helical flow channels of the primary heat exchanger, while a drinking water stream is heated in the secondary heat exchanger and supplied to the consumer.
  • the domestic hot water preparation is thus dependent on a circulated by a pump heating water flow, a changeover valve and a secondary heat exchanger.
  • the secondary heat exchanger is usually designed as Plattenphiltauseher.
  • Object of the present invention is to provide a heat exchanger in which a domestic hot water production accomplished with the least possible additional design effort, dispense with expensive additional components and a risk of failure is minimized.
  • the structural design of the heat exchanger is characterized by a in the heating water channel - here called the first heat-absorbing flow channel - arranged separate second heat-absorbing flow channel for a second heat-absorbing medium.
  • This second heat-absorbing flow channel substantially follows the helical course of the first heat-absorbing flow channel and is at least partially surrounded by the first heat-absorbing medium.
  • the second heat-absorbing medium may be, for example, drinking water.
  • the second heat-absorbing flow channel thermally conductively connected to the bottom of the first heat-absorbing flow channel.
  • the cross-sectional shape of the second heat-absorbing flow channel may be round or elliptical.
  • the available free cross-sectional area of the second heat-absorbing flow channel is approximately half the size of the flow-available free cross-sectional area of the first heat-absorbing flow channel.
  • the second heat-absorbing flow channel opens at an end face of the base body approximately perpendicular to the first heat-absorbing flow channel and exits at the opposite end face in approximately perpendicular to the first heat-absorbing flow channel. In this case, the second flow channel passes through the end surfaces of the heat exchanger base body which delimit the first flow channel to the outside and which have recesses for this purpose.
  • the second heat-absorbing flow channel has locally different flow cross-sections along its longitudinal extent such that the flow rate of the second heat-absorbing medium flowing within the second heat-absorbing flow channel is adaptable to the heat load of the corresponding region of the first heat-absorbing flow channel and / or the heat-transmitting wall.
  • the heating of heating water happens as from the DE 103 06 699 A1 known under circulation by means of a circulation pump.
  • the heat flow comes from the heat-emitting medium of the SchuKes and flows through the heat-transferring wall and the first heat-absorbing flow channel laterally bounding helically rib in the heating water.
  • the second flow channel When a request of domestic hot water, the second flow channel is traversed by drinking water, while the heating water is not circulated further.
  • the heat flow now flows - from the heat-emitting medium of the Schugaszuges, the heat-transferring wall and the helically encircling rib coming - through the heating water in the second heat-absorbing flow channel and in the drinking water. If the second heat-absorbing flow channel is connected in a heat-conducting manner to the bottom of the first flow channel, heat also flows into the drinking water via this direct contact.
  • a heat exchanger which allows both the Schumacherer stiirmung and the domestic hot water preparation by the integration of a second heat-absorbing flow channel in a first heat-absorbing flow channel, dispensing with a secondary heat exchanger and a changeover valve.
  • the drinking water is supplied during the domestic hot water production by the supply pressure in the pipeline network, the heating water does not have to be circulated.
  • the risk of failing switching valve or zusetzerter plate heat exchanger is bypassed as well as a consumption of auxiliary power for the pump operation.
  • the drawing illustrates an embodiment that does not fall under the scope of the claims. It shows the schematic structure of the main body with first and second heat-absorbing flow channel of a heat exchanger according to the invention.
  • the central heating flue as a heat-emitting flow channel is recognizable, but not shown in detail.
  • the heat exchanger comprises a main body 1 and a separate enclosure 2.
  • the main body 1 is divided by the heat-transferring wall 3 into a heat-emitting flow channel 4 for a heat-emitting medium (heating gas) and into a first heat-absorbing flow channel 5 for a first heat-absorbing medium (heating water) ,
  • the first heat-absorbing flow channel 5 laterally bounding helically extending rib 6 gives the flow channel 5 its characteristic helical course along the heat-transferring wall 3, which is indicated in the lower drawing area by dashed lines.
  • a separate second heat-absorbing flow channel 7 - here tubular-shaped - for a second heat-absorbing medium (drinking water) arranged.
  • the second heat-absorbing flow channel 7 is thermally conductively connected to the bottom of the first heat-absorbing flow channel 5 and follows the helical course of the first flow channel 5, which is indicated by dashed lines in the upper drawing area.
  • At the end faces 8, 9 of the main body of the second flow channel 7 opens approximately perpendicular to the first flow channel 5 or occurs approximately vertically out of it.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Fluid Heaters (AREA)

Description

Die Erfindung betrifft einen Wärmetauscher nach dem Oberbegriff desThe invention relates to a heat exchanger according to the preamble of

Patentanspruches 1. Ein solcher Wärmetauscher ist aus Dokument EP 1 136 771 bekannt.Claim 1. Such a heat exchanger is from document EP 1 136 771 known.

Ein Wärmetauscher für ein Heizgerät ist auch aus der DE 103 06 699 A1 bekannt. Dabei ist ein im Wesentlichen zylindrischer Grundkörper, der gießtechnisch hergestellt ist, mit einer wärmeübertragenen Wand ausgeführt. Der Grundkörper besitzt im Inneren einen Heizgaszug für ein als wärmeabgebendes Medium dienendes Heizgas. An der Außenseite der wärmeübertragenden Wand weist der Grundkörper einen wendelförmigen Strömungskanal für ein als wärmeaufnehmendes Medium dienendes Heizwasser auf. Der Heizwasserkanal als wärmeaufnehmender Strömungskanal ist dabei durch einen in die Mantelfläche der wärmeübertragenden Wand wendelförmig eingeformten Graben gebildet, der nach außen hin mit einer die wärmeübertragende Wand umschließenden separaten Umhüllung umgeben ist, so dass sich der geschlossene, wendelförmige Heizwasserkanal an der äußeren Mantelfläche des Grundkörpers ergibt. Der Heizwasserkanal ist dabei über seine wendelförmige Erstreckung mit lokal unterschiedlichen Strömungsquerschnitten derart ausgeführt, dass die Strömungsgeschwindigkeit des innerhalb des wärmeaufnehmenden Strömungskanals strömenden Mediums an die Wärmebelastung des entsprechenden Bereiches der wärmeübertragenden Wand anpassbar ist.A heat exchanger for a heater is also from the DE 103 06 699 A1 known. Here, a substantially cylindrical base body, which is produced by casting, executed with a heat-transferred wall. The main body has inside a Heizgaszug for serving as a heat-emitting medium heating gas. On the outside of the heat-transferring wall, the base body has a helical flow channel for serving as a heat-absorbing medium heating water. The Heizwasserkanal as a heat-absorbing flow channel is formed by a molded into the lateral surface of the heat-transferring wall trench, which is surrounded to the outside with a heat-transmitting wall enclosing a separate enclosure, so that the closed, helical Heizwasserkanal results on the outer surface of the body , The Heizwasserkanal is designed over its helical extent with locally different flow cross-sections such that the flow rate of flowing within the heat-receiving flow channel medium to the heat load of the corresponding portion of the heat-transferring wall is adaptable.

Die EP 1136 771 A2 offenbart einen Rektifikator für eine Diffusionsabsorptionsanlage mit einem Dreifach-Wärmetauscher, welcher drei benachbarte Kanäle für Ammoniakdampf sowie reiche und arme AmmoniakWasser-Lösung aufweist. Dabei ist der Dreifach-Wärmetauscher um Kocherrohre angeordnet und weist eine innere und äußere Wand auf, deren Zwischenraum vorzugsweise zwei weitere Kanäle einschließt.The EP 1136 771 A2 discloses a rectifier for a diffusion absorption plant having a triple heat exchanger having three adjacent channels of ammonia vapor and rich and poor ammonia water solution. In this case, the triple heat exchanger is arranged around cooker tubes and has an inner and outer wall, the intermediate space preferably includes two further channels.

Das im wärmeaufnehmenden Strömungskanal fließende Heizwasser wird von einer Pumpe umgewälzt und externen Wärmesenken zugeführt. Hier dient das Heizwasser zum Beispiel der Raumheizung oder Trinkwarmwasserbereitung.The heating water flowing in the heat-absorbing flow channel is circulated by a pump and supplied to external heat sinks. Here, the heating water is used, for example, the space heating or domestic hot water.

Im Falle einer Trinkwarmwasserbereitung erkennt eine Heizgeräteregelung einen entsprechenden Trinkwasserwärmebedarf und betätigt ein Umschaltventil, das das im oben beschriebenen Wärmetauscher erwärmte Heizwasser über einen separaten Trinkwasserwärmetauscher, auch Sekundärwärmetauscher genannt, leitet. Das Heizwasser kühlt im Sekundärwärmetauscher ab und strömt zurück in die wendelförmigen Strömungskanäle des primären Wärmetauschers, während ein Trinkwasserstrom im Sekundärwärmetauscher erwärmt und dem Verbraucher zugeführt wird. Die Trinkwarmwasserbereitung ist also auf einen von einer Pumpe umgewälzten Heizwasserstrom, ein Umschaltventil und einen Sekundärwärmetauscher angewiesen. Der Sekundärwärmetauscher ist zumeist als Plattenwärmetauseher ausgeführt.In the case of domestic hot water, a heater control detects a corresponding drinking water heat demand and actuates a switching valve, which called the heated in the heat exchanger described above heating water via a separate drinking water heat exchanger, also called secondary heat exchanger directs. The heating water cools in the secondary heat exchanger and flows back into the helical flow channels of the primary heat exchanger, while a drinking water stream is heated in the secondary heat exchanger and supplied to the consumer. The domestic hot water preparation is thus dependent on a circulated by a pump heating water flow, a changeover valve and a secondary heat exchanger. The secondary heat exchanger is usually designed as Plattenwärmetauseher.

Aufgabe der vorliegenden Erfindung ist es, einen Wärmetauscher zu schaffen, bei dem eine Trinkwarmwasserbereitung mit möglichst geringem konstruktiven Zusatzaufwand bewerkstelligt, auf teure Zusatzkomponenten verzichtet und ein Ausfallrisiko minimiert wird.Object of the present invention is to provide a heat exchanger in which a domestic hot water production accomplished with the least possible additional design effort, dispense with expensive additional components and a risk of failure is minimized.

Erfindungsgemäß wird dies mit den Merkmalen des Patentanspruches 1 gelöst. Vorteilhafte Weiterbildungen sind den Unteransprüchen zu entnehmen.This is achieved with the features of claim 1 according to the invention. Advantageous developments can be found in the dependent claims.

Der konstruktive Aufbau des Wärmetauschers ist gekennzeichnet durch einen im Heizwasserkanal - hier erster wärmeaufnehmender Strömungskanal genannt - angeordneten separaten zweiten wärmeaufnehmenden Strömungskanal für ein zweites wärmeaufnehmendes Medium. Dieser zweite wärmeaufnehmende Strömungskanal folgt im Wesentlichen dem wendelförmigen Verlauf des ersten wärmeaufnehmenden Strömungskanals und ist vom ersten wärmeaufnehmenden Medium mindestens teilweise umspült. Bei dem zweiten wärmeaufnehmenden Medium kann es sich beispielsweise um Trinkwasser handeln. In einer Ausführungsform ist der zweite wärmeaufnehmende Strömungskanal wärmeleitend mit dem Grund des ersten wärmeaufnehmenden Strömungskanals verbunden. So kann der Wärmetauschergrundkörper aus einem Gusswerkstoff und der zweite wärmeaufnehmende Strömungskanal aus Metallrohr bestehen, wobei der zweite wärmeaufnehmende Strömungskanal auf dem Grund des ersten wärmeaufnehmenden Strömungskanals aufgelötet oder aufgeschweißt ist. Die Querschnittsform des zweiten wärmeaufnehmenden Strömungskanals kann rund oder elliptisch sein. Die der Strömung zur Verfügung stehende freie Querschnittsfläche des zweiten wärmeaufnehmenden Strömungskanals ist in etwa halb so groß bis doppelt so groß wie die der Strömung zur Verfügung stehende freie Querschnittsfläche des ersten wärmeaufnehmenden Strömungskanals. Der zweite wärmeaufnehmende Strömungskanal mündet an einer Stirnfläche des Grundkörpers in etwa senkrecht in den ersten wärmeaufnehmenden Strömungskanal ein und tritt an der gegenüberliegenden Stirnfläche in etwa senkrecht auf dem ersten wärmeaufnehmenden Strömungskanal aus. Dabei durchtritt der zweite Strömungskanal die den ersten Strömungskanal nach außen begrenzenden Stirnflächen des Wärmetauschergrundkörpers, die zu diesem Zweck Aussparungen aufweisen. Gemäß der Erfindung weist der zweite wärmeaufnehmenden Strömungskanal entlang seiner Längserstreckung lokal unterschiedliche Strömungsquerschnitte derart auf, dass die Strömungsgeschwindigkeit des innerhalb des zweiten wärmeaufnehmenden Strömungskanals strömenden zweiten wärmeaufnehmenden Mediums an die Wärmebelastung des entsprechenden Bereiches des ersten wärmeaufnehmenden Strömungskanals und/oder der wärmeübertragenden Wand anpassbar ist.The structural design of the heat exchanger is characterized by a in the heating water channel - here called the first heat-absorbing flow channel - arranged separate second heat-absorbing flow channel for a second heat-absorbing medium. This second heat-absorbing flow channel substantially follows the helical course of the first heat-absorbing flow channel and is at least partially surrounded by the first heat-absorbing medium. The second heat-absorbing medium may be, for example, drinking water. In one embodiment, the second heat-absorbing flow channel thermally conductively connected to the bottom of the first heat-absorbing flow channel. Thus, the heat exchanger main body of a cast material and the second heat-absorbing flow channel made of metal tube, wherein the second heat-absorbing flow channel is soldered or welded on the bottom of the first heat-absorbing flow channel. The cross-sectional shape of the second heat-absorbing flow channel may be round or elliptical. The available free cross-sectional area of the second heat-absorbing flow channel is approximately half the size of the flow-available free cross-sectional area of the first heat-absorbing flow channel. The second heat-absorbing flow channel opens at an end face of the base body approximately perpendicular to the first heat-absorbing flow channel and exits at the opposite end face in approximately perpendicular to the first heat-absorbing flow channel. In this case, the second flow channel passes through the end surfaces of the heat exchanger base body which delimit the first flow channel to the outside and which have recesses for this purpose. According to the invention, the second heat-absorbing flow channel has locally different flow cross-sections along its longitudinal extent such that the flow rate of the second heat-absorbing medium flowing within the second heat-absorbing flow channel is adaptable to the heat load of the corresponding region of the first heat-absorbing flow channel and / or the heat-transmitting wall.

Die Erwärmung von Heizwasser geschieht wie aus der DE 103 06 699 A1 bekannt unter Umwälzung mittels einer Umwälzpumpe. Der Wärmestrom kommt aus dem wärmeabgebenden Medium des Heizgaszuges und fließt durch die wärmeübertragende Wand und die den ersten wärmeaufnehmenden Strömungskanal seitlich begrenzende wendelförmig umlaufende Rippe in das Heizwasser.The heating of heating water happens as from the DE 103 06 699 A1 known under circulation by means of a circulation pump. The heat flow comes from the heat-emitting medium of the Heizgaszuges and flows through the heat-transferring wall and the first heat-absorbing flow channel laterally bounding helically rib in the heating water.

Bei einer Anforderung von Trinkwarmwasser wird der zweite Strömungskanal von Trinkwasser durchströmt, während das Heizwasser nicht weiter umgewälzt wird. Der Wärmestrom fließt nun - aus dem wärmeabgebenden Medium des Heizgaszuges, der wärmeübertragenden Wand und der wendelförmig umlaufenden Rippe kommend - durch das Heizwasser in den zweiten wärmeaufnehmenden Strömungskanal und in das Trinkwasser. Ist der zweite wärmeaufnehmende Strömungskanal wärmeleitend mit dem Grund des ersten Strömungskanales verbunden, so fließt auch über diesen direkten Kontakt Wärme in das Trinkwasser.When a request of domestic hot water, the second flow channel is traversed by drinking water, while the heating water is not circulated further. The heat flow now flows - from the heat-emitting medium of the Heizgaszuges, the heat-transferring wall and the helically encircling rib coming - through the heating water in the second heat-absorbing flow channel and in the drinking water. If the second heat-absorbing flow channel is connected in a heat-conducting manner to the bottom of the first flow channel, heat also flows into the drinking water via this direct contact.

Mit dieser Erfindung wird ein Wärmetauscher geschaffen, der durch die Integration eines zweiten wärmeaufnehmenden Strömungskanals in einem ersten wärmeaufnehmenden Strömungskanal sowohl die Heizwassererwärmung als auch die Trinkwarmwasserbereitung ermöglicht und dabei auf einen Sekundärwärmetauscher und ein Umschaltventil verzichtet. Das Trinkwasser wird während der Trinkwarmwasserbereitung durch den Versorgungsdruck im Leitungsnetz gefördert, das Heizwasser muss nicht umgewälzt werden. Das Risiko von ausfallendem Umschaltventil oder sich zusetzendem Plattenwärmetauscher wird ebenso umgangen wie ein Verbrauch von Hilfsenergie für den Pumpen betrieb.With this invention, a heat exchanger is provided which allows both the Heizwassererwärmung and the domestic hot water preparation by the integration of a second heat-absorbing flow channel in a first heat-absorbing flow channel, dispensing with a secondary heat exchanger and a changeover valve. The drinking water is supplied during the domestic hot water production by the supply pressure in the pipeline network, the heating water does not have to be circulated. The risk of failing switching valve or zusetzerter plate heat exchanger is bypassed as well as a consumption of auxiliary power for the pump operation.

Die Zeichnung stellt ein Ausführungsbeispiel dar, das nicht unter den Scheitzbereich den Ansprüche fällt. Es zeigt den schematischen Aufbau des Grundkörpers mit erstem und zweitem wärmeaufnehmenden Strömungskanal eines erfindungsgemäßen Wärmetauschers. Der zentral liegende Heizgaszug als wärmeabgebender Strömungskanal ist erkennbar, aber nicht im Detail dargestellt.The drawing illustrates an embodiment that does not fall under the scope of the claims. It shows the schematic structure of the main body with first and second heat-absorbing flow channel of a heat exchanger according to the invention. The central heating flue as a heat-emitting flow channel is recognizable, but not shown in detail.

Gemäß Zeichnung umfasst der Wärmetauschereinen Grundkörper 1 und eine separate Umhüllung 2. Der Grundkörper 1 wird durch die wärmeübertragende Wand 3 in einen wärmeabgebenden Strömungskanal 4 für ein wärmeabgebendes Medium (Heizgas) und in einen ersten wärmeaufnehmenden Strömungskanal 5 für ein erstes wärmeaufnehmendes Medium (Heizwasser) geteilt. Die den ersten wärmeaufnehmenden Strömungskanal 5 seitlich begrenzende wendelförmig umlaufende Rippe 6 gibt dem Strömungskanal 5 seinen charakteristischen wendelförmigen Verlauf entlang der wärmeübertragenden Wand 3, der im unteren Zeichnungsbereich durch Strichlinien angedeutet ist. Im ersten wärmeaufnehmenden Strömungskanal 5 ist ein separater zweiter wärmeaufnehmender Strömungskanal 7 - hier rohrförmig ausgebildet - für ein zweites wärmeaufnehmendes Medium (Trinkwasser) angeordnet. Der zweite wärmeaufnehmende Strömungskanal 7 ist wärmeleitend mit dem Grund des ersten wärmeaufnehmenden Strömungskanals 5 verbunden und folgt dem wendelförmigen Verlauf des ersten Strömungskanals 5, was durch Strichlinien im oberen Zeichnungsbereich angedeutet wird. An den Stirnflächen 8, 9 des Grundkörpers mündet der zweite Strömungskanal 7 etwa senkrecht in den ersten Strömungskanal 5 ein bzw. tritt etwa senkrecht aus ihm heraus. Für den Durchtritt des zweiten Strömungskanals 7 weisen die Stirnflächen 8, 9 Aussparungen 10, 11 auf.According to the drawing, the heat exchanger comprises a main body 1 and a separate enclosure 2. The main body 1 is divided by the heat-transferring wall 3 into a heat-emitting flow channel 4 for a heat-emitting medium (heating gas) and into a first heat-absorbing flow channel 5 for a first heat-absorbing medium (heating water) , The first heat-absorbing flow channel 5 laterally bounding helically extending rib 6 gives the flow channel 5 its characteristic helical course along the heat-transferring wall 3, which is indicated in the lower drawing area by dashed lines. In the first heat-absorbing flow channel 5, a separate second heat-absorbing flow channel 7 - here tubular-shaped - for a second heat-absorbing medium (drinking water) arranged. The second heat-absorbing flow channel 7 is thermally conductively connected to the bottom of the first heat-absorbing flow channel 5 and follows the helical course of the first flow channel 5, which is indicated by dashed lines in the upper drawing area. At the end faces 8, 9 of the main body of the second flow channel 7 opens approximately perpendicular to the first flow channel 5 or occurs approximately vertically out of it. For the passage of the second flow channel 7, the end faces 8, 9 recesses 10, 11.

Claims (7)

  1. Heat exchanger, comprising a separate shell (2) and a main body (1), in which there are formed a heat-releasing flow duct (4) for a heat-releasing medium and a first heat-receiving flow duct (5) for a first heat-receiving medium, wherein a transfer of heat from the heat-releasing medium to the first heat-receiving medium takes place via a heat-transmitting wall (3) formed on the main body (1), wherein the first heat-receiving flow duct (5) is guided helically along the heat-transmitting wall (3) and is bounded laterally by a helically circumferential rib (6), and wherein in the first heat-receiving flow duct (5) there is arranged a separate, second heat-receiving flow duct (7) for a second heat-receiving medium, which essentially follows the helical path of the first heat-receiving flow duct (5) and around at least part of which the first heat-receiving medium flows, characterized in that the second heat-receiving flow duct (7) has, along its longitudinal extent, locally different flow cross sections such that the flow speed of the second heat-receiving medium flowing within the second heat-receiving flow duct (7) can be adapted to the heat load of the corresponding region of the first heat-receiving flow duct (5) and/or of the heat-transmitting wall (3).
  2. Heat exchanger according to Claim 1, characterized in that the second heat-receiving flow duct (7) is connected in a heat-conducting manner with the base of the first heat-receiving flow duct (5).
  3. Heat exchanger according to Claim 1 or 2, characterized in that the main body (1) consists of a cast material and the second heat-receiving flow duct (7) consists of a metal pipe, wherein the second heat-receiving flow duct (7) is soldered or welded onto the base of the first heat-receiving flow duct (5).
  4. Heat exchanger according to one of Claims 1 to 3, characterized in that the cross section of the second heat-receiving flow duct (7) is round or elliptical.
  5. Heat exchanger according to one of Claims 1 to 4, characterized in that the free cross section area of the second heat-receiving flow duct (7) is approximately half to twice as large as the free cross section area of the first heat-receiving flow duct (5)
  6. Heat exchanger according to one of Claims 1 to 5, characterized in that at one end face of the main body (8) the second heat-receiving flow duct (7) opens approximately at right angles into the first heat-receiving flow duct (5) and at the opposite end face (9) exits the first heat-receiving flow duct (5) approximately at right angles.
  7. Heat exchanger according to one of Claims 1 to 6, characterized in that the first heat-receiving medium is heating water and the second heat-receiving medium is drinking water.
EP08016339.7A 2007-09-28 2008-09-17 Heat exchanger Not-in-force EP2042821B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR2007/06718A TR200706718A1 (en) 2007-09-28 2007-09-28 Exchanger.

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EP2042821A2 EP2042821A2 (en) 2009-04-01
EP2042821A3 EP2042821A3 (en) 2013-11-27
EP2042821B1 true EP2042821B1 (en) 2015-12-23

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EP08016339.7A Not-in-force EP2042821B1 (en) 2007-09-28 2008-09-17 Heat exchanger

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TR (1) TR200706718A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2003917C2 (en) * 2009-12-07 2011-06-09 Stichting Energie GAS COOLER.
NL2004147C2 (en) * 2010-01-26 2011-07-27 Daalderop Bv Heat exchanger.
WO2015006321A1 (en) * 2013-07-09 2015-01-15 Cast Aluminum Solutions, LLC Circulation heater
CN103591682B (en) * 2013-11-27 2016-01-20 郑宗标 High-effect low-emission water boiler
CN104776734A (en) * 2015-04-01 2015-07-15 威能(无锡)供热设备有限公司 Heat exchanger and gas-fired boiler adopting same
CN106247710A (en) * 2016-08-19 2016-12-21 安徽省宁国市天成电气有限公司 A kind of pipeline anti-icing equipment

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Publication number Priority date Publication date Assignee Title
FR813803A (en) * 1936-11-20 1937-06-09 Method and apparatus for heat exchange
FR1301171A (en) * 1961-09-20 1962-08-10 Saunier Duval Two-use gas boiler heaters
DE50106846D1 (en) * 2000-03-22 2005-09-01 Bbt Thermotechnik Gmbh Rectifier for a diffusion absorption plant
EP1340947A1 (en) * 2002-02-28 2003-09-03 Christian Dr.-Ing. Lorenz Heater
DE10306699A1 (en) 2003-02-18 2004-09-02 Robert Bosch Gmbh Heat exchanger with a flow-optimized heat-absorbing flow channel, in particular for a heater
CA2604159A1 (en) * 2005-04-07 2006-10-12 Baker, Alan Paul Improvements in control of heat exchangers

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TR200706718A1 (en) 2009-04-21
EP2042821A2 (en) 2009-04-01

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