EP2090858B1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP2090858B1
EP2090858B1 EP09001426A EP09001426A EP2090858B1 EP 2090858 B1 EP2090858 B1 EP 2090858B1 EP 09001426 A EP09001426 A EP 09001426A EP 09001426 A EP09001426 A EP 09001426A EP 2090858 B1 EP2090858 B1 EP 2090858B1
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EP
European Patent Office
Prior art keywords
coil
heat exchanger
section
cross
ventilation
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EP09001426A
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German (de)
French (fr)
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EP2090858A1 (en
Inventor
Roger Doenges
Ruediger Stock
Gunthard Goerge
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Viessmann Werke GmbH and Co KG
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Viessmann Werke GmbH and Co KG
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Priority to SI200930002T priority Critical patent/SI2090858T1/en
Priority to PL09001426T priority patent/PL2090858T3/en
Publication of EP2090858A1 publication Critical patent/EP2090858A1/en
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Publication of EP2090858B1 publication Critical patent/EP2090858B1/en
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    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0472—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being helically or spirally coiled
    • F28D1/0473—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being helically or spirally coiled the conduits having a non-circular cross-section
    • 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
    • F28D7/024—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 tubes, the coils having a cylindrical configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/18—Safety or protection arrangements; Arrangements for preventing malfunction for removing contaminants, e.g. for degassing

Definitions

  • the invention relates to a heat exchanger according to the preamble of patent claim 1.
  • a heat exchanger of the type mentioned is according to the DE 200 09 560 U1 known. This consists of a liquid heat transfer medium leading, helically coiled coiled tubing with a horizontally oriented helical axis and with one above and one below the helix axis coiled tube part.
  • supply and return connections are provided on the outer circumference of the coiled tubing, on the one hand serve for venting and removal of the heat transfer medium on the other hand also for venting.
  • This heat exchanger is part of a boiler, ie it encloses a combustion chamber with a burner producing an exhaust gas, wherein the exhaust gas flows through flow gaps of the coiled tubing and thereby emits its heat to the liquid heat transfer medium.
  • the invention has for its object to provide for a tube-like heat exchanger with horizontal helical axis for the best possible ventability, regardless of whether this heat exchanger has the above-described flow and return ports or not.
  • heat exchanger of the type mentioned by the features listed in the characterizing part of patent claim 1. It should be noted that the heat exchanger according to the invention is not limited to the application in a boiler, but rather, for example, in hot water tanks can be used (in this case, the heat exchanger is not of an exhaust gas of a burner, but flows around to be heated water), where also the problem of deteriorated heat transfer can occur by gas entry.
  • the coiled tubing has a two-part flow cross-section, the first, larger flow cross-section being provided for the heat transfer medium and the second, smaller flow cross-section being designed as bleeding helix, wherein this helix per helix travel is at least one in the area of the helix part located above the helical axis Having the first connected to the second flow cross-section vent opening.
  • the proviso of a "two-part flow cross-section" includes both the possibility of a one-piece tube coil in principle with two flow spaces and the possibility that another component is introduced into the coiled tubing.
  • an additional coiled tubing (venting coil) is arranged in the coiled tube, wherein the per vent preferably provided in the uppermost area vent allows escape of possibly accumulated air or gas.
  • venting coil should be smaller cross section than the coiled tubing is on the one hand mandatory, otherwise they could not be arranged in the coiled tubing, on the other hand, this proviso but also means that especially the gas and only very small parts Heat transfer medium can flow through the vent coil. This will be discussed in more detail below.
  • FIG. 1 First, a highly abstracted embodiment of the heat exchanger according to the invention is shown. This exists (but this also applies to the embodiments according to FIGS. 2 to 4 ) from a liquid heat transfer medium leading, an approximately rectangular flow cross-section having coiled tubing 1 with a horizontally oriented helical axis 2 and with one above and below the helix axis 2 coiled tube part 3, 4.
  • the coiled tubing is helically wound formed.
  • it serves as a heat exchanger in a boiler, it has fürströmspalte 10 (indicated by dashed lines) through which flows the hot exhaust gas of a burner and thereby heats the heat transfer medium in the coiled tubing.
  • the coiled tubing 1 has a two-part flow cross-section, wherein the first, larger flow cross section 5 is provided for the heat transfer medium and the second, smaller flow cross section 6 is formed as a bleed helix 7, wherein this per helical gear in the region above Has spiral axis 2 located coiled tubing part 3 at least one of the first with the second flow cross-section 5, 6 connecting the vent opening 8.
  • vent openings 8 could in this case have been produced, for example, by double drilling through the coiled tubing and then welding the outer opening.
  • the venting opening 8 has a cross-sectional area which is smaller than the flow-through cross section 6 of the venting spiral 7. Further, since the flow area 5 for the heat transfer medium is greater than the flow cross-section 6 of the venting coil 7, it follows that the cross-section of the vent opening 8 is preferably much smaller than the flow area 5 for the heat transfer medium. This proviso leads to a pressure gradient within the heat exchanger, so that on the one hand good ventilation is ensured, but on the other hand, only a very small loss of heat transfer medium via the vent coil results.
  • the flow cross-section 6 of the venting helix 7 is circular and the vent 8 itself is formed as a circular bore.
  • the venting coil 7 for example, rectangular
  • the vent opening 8 for example, slit-shaped
  • a tubular helix with a simple borehole or even several boreholes is (obviously) easiest to produce.
  • venting coil 7 In order to ensure a secure positioning of the venting coil 7 within the coiled tubing 1, in particular with reference to FIG. 4 preferably provided that the helically wound venting coil 7 distributed over its circumference preferably three radially outwardly facing, inside of the coiled tubing 1 supporting bulges 9 has.
  • the outer diameter of the venting spiral 7 defined by the bulges 9 corresponds approximately to the inner outer diameter of the flow cross section 5 for the heat transfer medium, ie after screwing in the venting coil 7, this is supported on the inner wall of the coiled tubing 1 so that the position of the venting coil 7 is within the coiled tubing 1 always remains safe, which is particularly important in relation to the position of the vent opening 8, since the venting of the heat exchanger, of course, works best when the vent 8 is located at the very top within the coiled tubing 1, and this is accordingly preferred in that one of the bulges 9 is arranged in the uppermost region of the upper coiled tubing part 3 and the vent opening 8 is arranged on the latter (cf. FIG. 2 and 3 ).
  • the heat exchanger according to the invention or in particular the venting technology according to the invention functions as follows:
  • the reinstallation of a boiler with a horizontally oriented heat exchanger it follows that in the heat transfer medium dissolved gas (in particular air) due to gravity accumulates at the highest point within the coiled tubing 1.
  • the venting coil 7 with a vent opening 8 is arranged especially at this point, the gas can be discharged via the venting coil 7, for which purpose it is brought into contact with the environment of the heat exchanger at least temporarily (for example with a quick-vent valve).
  • the pressure in the heat transfer medium ensures that excess gas is discharged via the vent 8 and the vent coil 7 from the heat exchanger and there no longer disturbs the heat transfer.
  • the heat exchanger according to the invention is characterized by the screwed-in all helical or venting bleeder by an extremely efficient ventilation process, wherein This simple quick-venting can be carried out optionally at commissioning of the heat exchanger, but of course also at any time later and again and again.
  • venting helix conforms to the FIG. 2 at least initially designed so that screwing is possible without hindrance.
  • At least one end of the venting coil must be open during the venting process against an environment having a lower pressure level than the heat transfer medium.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Power Steering Mechanism (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

The exchanger has a helical tube (1) guiding a liquid heat transfer medium. The tube has a horizontal oriented aligned spiral axis (2) and helical tube parts (3, 4) provided above and below the spiral axis. The helical tube has a larger flowing cross section (5) provided for heat transfer medium and a smaller flowing cross section (6) formed smaller than an exhaust spiral coil (7). The coil has an exhaust opening (6) per spiral course in the area of the tube part (3) provided above the spiral axis. The opening connects the larger flowing cross section with the smaller flowing cross section.

Description

Die Erfindung betrifft einen Wärmetauscher gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a heat exchanger according to the preamble of patent claim 1.

Ein Wärmetauscher der eingangs genannten Art ist nach der DE 200 09 560 U1 bekannt. Dieser besteht aus einer ein flüssiges Wärmeträgermedium führenden, schraubenlinienartig gewickelten Rohrwendel mit einer horizontal orientiert ausgerichteten Wendelachse und mit einem oberhalb und einem unterhalb der Wendelachse befindlichen Rohrwendelteil. Bei diesem Wärmetauscher sind am äußeren Umfang der Rohrwendel Vor- und Rücklaufanschlüsse vorgesehen, die einerseits zur Zu- und Abführung des Wärmeträgermediums andererseits aber auch zur Entlüftung dienen. Dieser Wärmetauscher ist Teil eines Heizkessel, d. h. er umschließt eine Brennkammer mit einem ein Abgas erzeugenden Brenner, wobei das Abgas durch Strömungsspalte der Rohrwendel strömt und dabei seine wärme an das flüssige Wärmeträgermedium abgibt.A heat exchanger of the type mentioned is according to the DE 200 09 560 U1 known. This consists of a liquid heat transfer medium leading, helically coiled coiled tubing with a horizontally oriented helical axis and with one above and one below the helix axis coiled tube part. In this heat exchanger supply and return connections are provided on the outer circumference of the coiled tubing, on the one hand serve for venting and removal of the heat transfer medium on the other hand also for venting. This heat exchanger is part of a boiler, ie it encloses a combustion chamber with a burner producing an exhaust gas, wherein the exhaust gas flows through flow gaps of the coiled tubing and thereby emits its heat to the liquid heat transfer medium.

Der Erfindung liegt die Aufgabe zugrunde, bei einem rohrwendelförmigen Wärmetauscher mit horizontaler Wendelachse für eine möglichst gute Entlüftbarkeit zu sorgen, und zwar unabhängig davon, ob dieser Wärmetauscher die oben beschriebenen Vor- und Rücklaufanschlüsse aufweist oder nicht.The invention has for its object to provide for a tube-like heat exchanger with horizontal helical axis for the best possible ventability, regardless of whether this heat exchanger has the above-described flow and return ports or not.

Diese Aufgabe ist mit einem Wärmetauscher der eingangs genannten Art durch die im Kennzeichen des Patentanspruchs 1 aufgeführten Merkmale gelöst. Dabei ist festzuhalten, dass der erfindungsgemäße Wärmetauscher nicht auf die Anwendung in einem Heizkessel beschränkt ist, sondern vielmehr zum Beispiel auch bei Warmwasserspeichern eingesetzt werden kann (in diesem Fall wird der Wärmetauscher nicht von einem Abgas eines Brenners, sondern von aufzuwärmenden Wasser umströmt), bei denen ebenfalls das Problem der verschlechterten Wärmeübertragung durch Gaseintrag auftreten kann.This object is achieved with a heat exchanger of the type mentioned by the features listed in the characterizing part of patent claim 1. It should be noted that the heat exchanger according to the invention is not limited to the application in a boiler, but rather, for example, in hot water tanks can be used (in this case, the heat exchanger is not of an exhaust gas of a burner, but flows around to be heated water), where also the problem of deteriorated heat transfer can occur by gas entry.

Nach der Erfindung ist also vorgesehen, dass die Rohrwendel einen zweiteiligen Durchströmquerschnitt aufweist, wobei der erste, größere Durchströmquerschnitt für das Wärmeträgermedium vorgesehen und der zweite, kleinere Durchströmquerschnitt als Entlüftungswendel ausgebildet ist, wobei diese pro Wendelgang im Bereich des oberhalb der Wendelachse befindlichen Rohrwendelteils mindestens eine den ersten mit dem zweiten Durchströmquerschnitt verbindende Entlüftungsöffnung aufweist.According to the invention, it is thus provided that the coiled tubing has a two-part flow cross-section, the first, larger flow cross-section being provided for the heat transfer medium and the second, smaller flow cross-section being designed as bleeding helix, wherein this helix per helix travel is at least one in the area of the helix part located above the helical axis Having the first connected to the second flow cross-section vent opening.

Die Maßgabe eines "zweiteiligen Durchströmquerschnittes" beinhaltet dabei sowohl die Möglichkeit einer im Prinzip einstückigen Rohrwendel mit zwei Strömungsräumen als auch die Möglichkeit, dass in die Rohrwendel ein weiteres Bauteil eingebracht ist. Mit anderen Worten ausgedrückt, wird bei dieser Variante eine zusätzliche Rohrwendel (Entlüftungswendel) in der Rohrwendel angeordnet, wobei die pro Wendel vorzugsweise im obersten Bereich vorgesehene Entlüftungsöffnung ein Entweichen von sich möglicherweise angesammelter Luft bzw. Gas ermöglicht.The proviso of a "two-part flow cross-section" includes both the possibility of a one-piece tube coil in principle with two flow spaces and the possibility that another component is introduced into the coiled tubing. In other words, in this variant, an additional coiled tubing (venting coil) is arranged in the coiled tube, wherein the per vent preferably provided in the uppermost area vent allows escape of possibly accumulated air or gas.

Zum besseren Verständnis der Erfindung ist Folgendes zu beachten: Bei rohrwendelförmigen Wärmetauschern mit horizontaler Wendelachse besteht das prinzipielle Problem, dass sich mit dem Wärmeträgermedium in den Wärmetauscher eintretendes Gas schwerkraftbedingt im oberen Bereich der Rohrwendeln sammelt. Dies ist unerwünscht, da dadurch die Wärmeübertragung verschlechtert wird. Beim Ausführungsbeispiel gemäß der DE 200 09 560 U1 ist bei jeder zweiten Wendel ein Anschluss vorgesehen, über den ein solches Gas abgeführt werden kann (es sammelt sich allerdings in den Wendelgängen ohne Anschluss). Bei einem Wärmetauscher ohne derartige Anschlüsse, also zum Beispiel bei einem gemäß der EP 1 562 006 A1 , kann dieses Phänomen umso problemtatischer sein, je größer der Wärmetauscher ausgebildet ist.For a better understanding of the invention, the following should be noted: In tube-shaped heat exchangers with a horizontal helical axis there is the fundamental problem that with the heat transfer medium entering the heat exchanger gas collects by gravity in the upper part of the coiled tubing. This is undesirable because it deteriorates the heat transfer. In the embodiment according to the DE 200 09 560 U1 is provided at every other helix a connection through which such a gas can be removed (it collects However, in the spiral turns without connection). In a heat exchanger without such connections, so for example in accordance with the EP 1 562 006 A1 , this phenomenon can be the more problematic the larger the heat exchanger is formed.

Gemäß der Erfindung wird diesem Problem nun damit begegnet, dass genau an der Stelle, wo sich das Gas sammelt, für eine entsprechende Abführmöglichkeit gesorgt ist, nämlich dadurch, dass dort in der Entlüftungswendel mindestes eine Entlüftungsöffnung vorgesehen ist, über die das Gas abströmen kann.According to the invention, this problem is now met with the fact that exactly at the point where the gas collects, is provided for a corresponding Abführmöglichkeit, namely the fact that there is provided in the venting spiral at least one vent opening through which the gas can flow.

Die Maßgabe, dass die Entlüftungswendel querschnittskleiner als die Rohrwendel sein soll, ist dabei einerseits zwingend, da sie sonst gar nicht in der Rohrwendel angeordnet sind könnte, andererseits hat diese Maßgabe aber auch zur Folge, dass vorallem das Gas und nur zu sehr kleinen Teilen das Wärmeträgermedium über die Entlüftungswendel abströmen kann. Hierauf wird weiter unten noch genauer eingegangen.The proviso that the venting coil should be smaller cross section than the coiled tubing is on the one hand mandatory, otherwise they could not be arranged in the coiled tubing, on the other hand, this proviso but also means that especially the gas and only very small parts Heat transfer medium can flow through the vent coil. This will be discussed in more detail below.

Andere vorteilhafte Weiterbildungen des erfindungsgemäßen Wärmetauschers ergeben sich aus den abhängigen Patentansprüchen.Other advantageous developments of the heat exchanger according to the invention will become apparent from the dependent claims.

Der erfindungsgemäße Wärmetauscher einschließlich seiner vorteilhaften Weiterbildungen gemäß der abhängigen Patentansprüche wird nachfolgend anhand der zeichnerischen Darstellung verschiedener Ausführungsbeispiele näher erläutert.The heat exchanger according to the invention including its advantageous developments according to the dependent claims will be explained in more detail with reference to the drawing of various embodiments.

Es zeigt

Figur 1
schematisch im Längsschnitt eine erste Ausführungsform des erfindungsgemäßen Wärmetauschers;
Figur 2
perspektivisch eine bevorzugte Ausführungsform der graphisch teilweise von der Rohrwendel freigestellten Entlüftungswendel mit speziellen Ausbuchtungen;
Figur 3
perspektivisch eine Teilansicht der Entlüftungswendel gemäß Figur 3 ohne Rohrwendel; und
Figur 4
perspektivisch und in Alleinstellung die Entlüftungswendel als separates Bauteil.
It shows
FIG. 1
schematically in longitudinal section a first embodiment of the heat exchanger according to the invention;
FIG. 2
perspective view of a preferred embodiment of the graphically partially released from the coiled tubing vent helix with special bulges;
FIG. 3
perspective view of a partial view of the venting helix according to FIG. 3 without coiled tubing; and
FIG. 4
in perspective and in isolation the venting coil as a separate component.

In Figur 1 ist zunächst eine stark abstrahierte Ausführungsform des erfindungsgemäßen Wärmetauschers dargestellt. Dieser besteht (dies gilt allerdings auch für die Ausführungsformen gemäß Figur 2 bis 4) aus einer ein flüssiges Wärmeträgermedium führenden, einen etwa rechteckigen Strömungsquerschnitt aufweisenden Rohrwendel 1 mit einer horizontal orientiert ausgerichteten Wendelachse 2 und mit einem oberhalb und einem unterhalb der Wendelachse 2 befindlichen Rohrwendelteil 3, 4. Die Rohrwendel ist dabei schraubenlinienförmig gewickelt ausgebildet. Für den Fall, dass sie als Wärmetauscher in einem Heizkessel dient, weist sie Durchströmspalte 10 (gestrichelt angedeutet auf), durch die das heiße Abgas eines Brenners strömt und dabei das Wärmeträgermedium in der Rohrwendel erwärmt.In FIG. 1 First, a highly abstracted embodiment of the heat exchanger according to the invention is shown. This exists (but this also applies to the embodiments according to FIGS. 2 to 4 ) from a liquid heat transfer medium leading, an approximately rectangular flow cross-section having coiled tubing 1 with a horizontally oriented helical axis 2 and with one above and below the helix axis 2 coiled tube part 3, 4. The coiled tubing is helically wound formed. In the event that it serves as a heat exchanger in a boiler, it has Durchströmspalte 10 (indicated by dashed lines) through which flows the hot exhaust gas of a burner and thereby heats the heat transfer medium in the coiled tubing.

Wesentlich für den erfindungsgemäßen Wärmetauscher ist nun, dass die Rohrwendel 1 einen zweiteiligen Durchströmquerschnitt aufweist, wobei der erste, größere Durchströmquerschnitt 5 für das Wärmeträgermedium vorgesehen und der zweite, kleinere Durchströmquerschnitt 6 als Entlüftungswendel 7 ausgebildet ist, wobei diese pro Wendelgang im Bereich des oberhalb der Wendelachse 2 befindlichen Rohrwendelteils 3 mindestens eine den ersten mit dem zweiten Durchströmquerschnitt 5, 6 verbindende Entlüftungsöffnung 8 aufweist.It is essential for the heat exchanger according to the invention that the coiled tubing 1 has a two-part flow cross-section, wherein the first, larger flow cross section 5 is provided for the heat transfer medium and the second, smaller flow cross section 6 is formed as a bleed helix 7, wherein this per helical gear in the region above Has spiral axis 2 located coiled tubing part 3 at least one of the first with the second flow cross-section 5, 6 connecting the vent opening 8.

Mit nochmaligem Verweis auf Figur 1 ist erkennbar, dass es sich prinzipiell (wenn auch eher theoretisch) um einen einteiligen Wärmetauscher mit zwei Durchströmquerschnitten handeln kann. Die Entlüftungsöffnungen 8 könnten in diesem Fall zum Beispiel per doppeltem Durchbohren der Rohrwendel und anschließendem Verschweißen der äußeren Öffnung erzeugt worden sein.With another reference to FIG. 1 It can be seen that it can in principle (albeit more theoretically) be a one-piece heat exchanger with two flow cross-sections. The vent openings 8 could in this case have been produced, for example, by double drilling through the coiled tubing and then welding the outer opening.

Fertigungstechnisch bevorzugt ist allerdings die Lösung gemäß den Figuren 2 bis 4, bei der die Entlüftungswendel 7 als separates Bauteil ausgebildet und in der Rohrwendel 1 angeordnet ist, wobei die Maßgabe "angeordnet" insbesondere bedeutet, dass die ebenfalls schraubenlinienförmige gewickelte Entlüftungswendel 7 korkenzieherartig in die Rohrwendel 1 "eingedreht bzw. -geschraubt" wird.However, in terms of manufacturing technology, the solution according to FIGS FIGS. 2 to 4 in which the venting coil 7 is formed as a separate component and is arranged in the tube coil 1, wherein the proviso "arranged" in particular means that the likewise helical wound venting coil 7 corkscrew-like in the tube coil 1 "screwed or screwed" is.

Damit über die Entlüftungswendel 7 höchstens geringe Mengen an Wärmeträgermedium entweichen können, weist die Entlüftungsöffnung 8 eine Querschnittsfläche auf, die kleiner als der Durchströmquerschnitt 6 der Entlüftungswendel 7 ausgebildet ist. Da ferner der Durchströmquerschnitt 5 für das Wärmeträgermedium größer als der Durchströmquerschnitt 6 der Entlüftungswendel 7 ist, folgt entsprechend, dass der Querschnitt der Entlüftungsöffnung 8 bevorzugt sehr viel kleiner als der Durchströmquerschnitt 5 für das Wärmeträgermedium ausgebildet ist. Diese Maßgabe führt zu einem Druckgefälle innerhalb des Wärmetauschers, so dass einerseits eine gute Entlüftung gewährleistet ist, sich andererseits aber nur ein sehr geringer Verlust an Wärmeträgermedium über die Entlüftungswendel ergibt.In order to be able to escape at most small amounts of heat transfer medium via the venting coil 7, the venting opening 8 has a cross-sectional area which is smaller than the flow-through cross section 6 of the venting spiral 7. Further, since the flow area 5 for the heat transfer medium is greater than the flow cross-section 6 of the venting coil 7, it follows that the cross-section of the vent opening 8 is preferably much smaller than the flow area 5 for the heat transfer medium. This proviso leads to a pressure gradient within the heat exchanger, so that on the one hand good ventilation is ensured, but on the other hand, only a very small loss of heat transfer medium via the vent coil results.

Fertigungstechnisch bevorzugt ist weiterhin vorgesehen, dass der Durchströmquerschnitt 6 der Entlüftungswendel 7 kreisförmig und die Entlüftungsöffnung 8 selbst als kreisförmige Bohrung ausgebildet ist. Selbstverständlich kommen aber auch andere Querschnitte für die Entlüftungswendel 7 (zum Beispiel rechteckig) bzw. die Entlüftungsöffnung 8 (zum Beispiel schlitzförmig) in Betracht; eine rohrförmige Wendel mit einem einfachen Bohrloch oder auch mehreren Bohrlöchern lässt sich aber (offensichtlich) am einfachsten herstellen.In terms of manufacturing technology, it is further provided that the flow cross-section 6 of the venting helix 7 is circular and the vent 8 itself is formed as a circular bore. Of course, however, other cross-sections for the venting coil 7 (for example, rectangular) or the vent opening 8 (for example, slit-shaped) come into consideration; a tubular helix with a simple borehole or even several boreholes is (obviously) easiest to produce.

Um eine sichere Positionierung der Entlüftungswendel 7 innerhalb der Rohrwendel 1 zu gewährleisten, ist insbesondere mit Verweis auf Figur 4 bevorzugt vorgesehen, dass die schraubenlinienartig gewickelte Entlüftungswendel 7 über ihren Umfang verteilt vorzugsweise drei radial nach außen weisende, sich innen an der Rohrwendel 1 abstützende Ausbuchtungen 9 aufweist. Dabei entspricht der durch die Ausbuchtungen 9 definierte Außendurchmesser der Entlüftungswendel 7 etwa dem inneren Außendurchmesser des Durchströmquerschnitts 5 für das Wärmeträgermedium, d. h. nach dem Eindrehen der Entlüftungswendel 7 stützt sich diese federartig an der Innenwand der Rohrwendel 1 ab, so dass die Position der Entlüftungswendel 7 innerhalb der Rohrwendel 1 stets sicher gewahrt bleibt, was insbesondere in Bezug auf die Position der Entlüftungsöffnung 8 wichtig ist, da die Entlüftung des Wärmetauschers natürlich dann am besten funktioniert, wenn sich die Entlüftungsöffnung 8 ganz oben innerhalb der Rohrwendel 1 befindet, wobei dieserhalb entsprechend bevorzugt ist, dass eine der Ausbuchtungen 9 im obersten Bereich des oberen Rohrwendelteils 3 angeordnet und an dieser die Entlüftungsöffnung 8 angeordnet ist (siehe hierzu Figur 2 und 3).In order to ensure a secure positioning of the venting coil 7 within the coiled tubing 1, in particular with reference to FIG. 4 preferably provided that the helically wound venting coil 7 distributed over its circumference preferably three radially outwardly facing, inside of the coiled tubing 1 supporting bulges 9 has. In this case, the outer diameter of the venting spiral 7 defined by the bulges 9 corresponds approximately to the inner outer diameter of the flow cross section 5 for the heat transfer medium, ie after screwing in the venting coil 7, this is supported on the inner wall of the coiled tubing 1 so that the position of the venting coil 7 is within the coiled tubing 1 always remains safe, which is particularly important in relation to the position of the vent opening 8, since the venting of the heat exchanger, of course, works best when the vent 8 is located at the very top within the coiled tubing 1, and this is accordingly preferred in that one of the bulges 9 is arranged in the uppermost region of the upper coiled tubing part 3 and the vent opening 8 is arranged on the latter (cf. FIG. 2 and 3 ).

Der erfindungsgemäße Wärmetauscher bzw. insbesondere die erfindungsgemäße Entlüftungstechnik funktioniert wie folgt:The heat exchanger according to the invention or in particular the venting technology according to the invention functions as follows:

Betrachtet man zum Beispiel die Neuinstallation eines Heizkessels mit einem horizontal ausgerichteten Wärmetauscher, so ergibt sich, dass sich im Wärmeträgermedium gelöstes Gas (insbesondere Luft) schwerkraftbedingt an der obersten Stelle innerhalb der Rohrwendeln 1 sammelt. Da aber gerade insbesondere an dieser Stelle die Entlüftungswendel 7 mit einer Entlüftungsöffnung 8 angeordnet ist, kann das Gas über die Entlüftungswendel 7 abgelassen werden, wozu diese mindestens zeitweilig (zum Beispiel mit einem Schnellentlüfterventil) mit der Umgebung des Wärmetauschers in Verbindung gebracht wird. Mit anderen Worten ausgedrückt, sorgt der Druck im Wärmeträgermedium dafür, dass überschüssiges Gas über die Entlüftungsöffnung 8 und die Entlüftungswendel 7 aus dem Wärmetauscher abgeführt wird und dort die Wärmeübertragung nicht mehr stört. - Im Gegensatz zu vorbekannten Methoden, Gas aus dem horizontal angeordneten Wärmetauscher auszutreiben (in der Regel einfach durch einen sehr hohen Wärmeträgermediumsdurchsatz), zeichnet sich der erfindungsgemäße Wärmetauscher mit der in alle Wendeln eingedrehten bzw. -eingeschraubten Entlüftungswendel durch einen äußerst effizienten Entlüftungsvorgang aus, wobei diese einfache Schnellentlüftung wahlweise bei Inbetriebnahme des Wärmetauschers, aber natürlch auch jederzeit später und auch immer wieder durchgeführt werden kann.Considering, for example, the reinstallation of a boiler with a horizontally oriented heat exchanger, it follows that in the heat transfer medium dissolved gas (in particular air) due to gravity accumulates at the highest point within the coiled tubing 1. However, since the venting coil 7 with a vent opening 8 is arranged especially at this point, the gas can be discharged via the venting coil 7, for which purpose it is brought into contact with the environment of the heat exchanger at least temporarily (for example with a quick-vent valve). In other words, the pressure in the heat transfer medium ensures that excess gas is discharged via the vent 8 and the vent coil 7 from the heat exchanger and there no longer disturbs the heat transfer. - In contrast to previously known methods to expel gas from the horizontally arranged heat exchanger (usually simply by a very high heat transfer medium throughput), the heat exchanger according to the invention is characterized by the screwed-in all helical or venting bleeder by an extremely efficient ventilation process, wherein This simple quick-venting can be carried out optionally at commissioning of the heat exchanger, but of course also at any time later and again and again.

Bezüglich der beiden Enden der Entlüftungswendel ist schließlich noch vorgesehen, dass diese auf geeignete Weise aus der Rohrwendel 1 herausgeführt sind. Hierfür kommt mit Verweis auf Figur 2 zum Beispiel ein (nicht dargestellter) Deckel in Betracht, der den Rohrwendelquerschnitt und Freilassung einer dem Querschnitt der Entlüftungswendel angepassten Öffnung verschließt. Es erklärt sich dabei von selbst, dass die Entlüftungswendel gemäß der Figur 2 zumindest anfangs so ausgebildet ist, dass das Einschrauben behinderungsfrei möglich ist. Ausserdem muss beim Entlüftungsvorgang mindestens ein Ende der Entlüftungswendel gegen eine Umgebung geöffnet sein, die ein niedrigeres Druckniveau als das Wärmeträgermedium aufweist.With regard to the two ends of the venting coil, it is finally provided that they are led out of the coiled tubing 1 in a suitable manner. This comes with a reference FIG. 2 for example, a cover (not shown) which closes the tube coil cross section and release of an opening adapted to the cross section of the venting coil. It is self-explanatory that the venting helix conforms to the FIG. 2 at least initially designed so that screwing is possible without hindrance. Moreover At least one end of the venting coil must be open during the venting process against an environment having a lower pressure level than the heat transfer medium.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Rohrwendelcoiled tubing
22
Wendelachsehelix axis
33
RohrwendelteilCoiled tubing part
44
RohrwendelteilCoiled tubing part
55
erster Durchströmquerschnittfirst flow area
66
zweiter Durchströmquerschnittsecond flow area
77
Entlüftungswendelventing Wendel
88th
Entlüftungsöffnungvent
99
Ausbuchtungbulge
1010
Durchströmspaltthroughflow

Claims (9)

  1. A heat exchanger, comprising a pipe coil (1) conducting a liquid heat transfer medium, having a coil axis (2) oriented horizontally and having one pipe part (3, 4) located above the coil axis (2) and one located below,
    characterized in that
    the pipe coil (1) has a two-part flow-through cross-section, the first, larger flow-through cross-section (5) being provided for the heat transfer medium and the second, smaller flow-through cross-section (6) being implemented as a ventilation coil (7), it having at least one ventilation opening (8), which connects the first to the second flow cross-section (5, 6), per coil turn in the area of the pipe coil part (3) located above the coil axis (2).
  2. The heat exchanger according to Claim 1,
    characterized in that
    the ventilation coil (7) is implemented as a separate component and is situated in the pipe coil (1).
  3. The heat exchanger according to Claim 1 or 2,
    characterized in that
    the ventilation opening (8) has a cross-sectional area which is implemented as smaller than the flow-through cross-section (6) of the ventilation coil (7).
  4. The heat exchanger according to one of Claims 1 through 3,
    characterized in that
    the flow-through cross-section (6) of the ventilation coil (7) is implemented as circular.
  5. The heat exchanger according to one of Claims 1 through 4,
    characterized in that
    the ventilation opening (8) is alternately implemented as a circular hole or as a linear or slotted opening.
  6. The heat exchanger according to one of Claims 1 through 5,
    characterized in that
    the ventilation coil (7) is implemented as wound in a spiral.
  7. The heat exchanger according to Claim 6,
    characterized in that
    the ventilation coil (7) wound in a spiral preferably has three protrusions (9), which point radially outward and are supported on the inside on the pipe coil (1), distributed over its circumference.
  8. The heat exchanger according to Claim 7,
    characterized in that
    one of the protrusions (9) is situated in the uppermost area of the upper pipe coil part (3), the ventilation opening (8) preferably being situated on this protrusion (9).
  9. The heat exchanger according to one of Claims 1 through 8,
    characterized in that
    the ventilation coil (7) is implemented as at least temporarily connectable to the environment of the heat exchanger.
EP09001426A 2008-02-12 2009-02-03 Heat exchanger Active EP2090858B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200930002T SI2090858T1 (en) 2008-02-12 2009-02-03 Heat exchanger
PL09001426T PL2090858T3 (en) 2008-02-12 2009-02-03 Heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008008734A DE102008008734A1 (en) 2008-02-12 2008-02-12 heat exchangers

Publications (2)

Publication Number Publication Date
EP2090858A1 EP2090858A1 (en) 2009-08-19
EP2090858B1 true EP2090858B1 (en) 2010-04-07

Family

ID=40467033

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09001426A Active EP2090858B1 (en) 2008-02-12 2009-02-03 Heat exchanger

Country Status (9)

Country Link
EP (1) EP2090858B1 (en)
AT (1) ATE463709T1 (en)
DE (2) DE102008008734A1 (en)
DK (1) DK2090858T3 (en)
ES (1) ES2341507T3 (en)
HR (1) HRP20100367T1 (en)
PL (1) PL2090858T3 (en)
RU (1) RU2476799C2 (en)
SI (1) SI2090858T1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011010444A1 (en) * 2011-02-04 2012-08-09 Viessmann Werke Gmbh & Co Kg Heating boiler has coil tube having coil tube ends for hydraulically connecting coil tube portions to supply and discharge ports and terminating hydraulic connection of coil tube portions respectively

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU494586A1 (en) * 1974-02-06 1975-12-05 Ордена Трудового Красного Знамени Предприятие П/Я А-1665 Ring heat exchanger
DE3315258A1 (en) * 1983-04-27 1984-10-31 Etablissement Agura, Vaduz Spiral ring heating boiler
FR2550615B1 (en) * 1983-08-12 1985-12-06 Fonderie Soc Gen De SERPENTINE EXCHANGER BOILER
RU2080536C1 (en) * 1994-01-12 1997-05-27 Тамбовское акционерное общество открытого типа "Комсомолец" Heat exchanger
DE20009560U1 (en) 2000-05-27 2000-09-28 Viessmann Werke Kg Heat exchanger
DE10106371A1 (en) * 2001-02-12 2002-08-14 Ludwig Pilsl Arrangement, for exchanging heat, has tubes combined to form flat mechanical unit by a joint with good thermal conductivity with common outer wall forming heat exchange surface
DE102004005048A1 (en) 2004-01-30 2005-09-01 Viessmann Werke Gmbh & Co Kg heater
CA2573082A1 (en) * 2004-07-09 2006-01-19 Junjie Gu Refrigeration system

Also Published As

Publication number Publication date
ES2341507T3 (en) 2010-06-21
RU2009101457A (en) 2010-07-27
ATE463709T1 (en) 2010-04-15
DK2090858T3 (en) 2010-07-05
DE502009000007D1 (en) 2010-05-20
RU2476799C2 (en) 2013-02-27
EP2090858A1 (en) 2009-08-19
DE102008008734A1 (en) 2009-08-13
SI2090858T1 (en) 2010-07-30
PL2090858T3 (en) 2010-07-30
HRP20100367T1 (en) 2010-10-31

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