EP0387584A2 - Heating gas draft tube - Google Patents
Heating gas draft tube Download PDFInfo
- Publication number
- EP0387584A2 EP0387584A2 EP90103715A EP90103715A EP0387584A2 EP 0387584 A2 EP0387584 A2 EP 0387584A2 EP 90103715 A EP90103715 A EP 90103715A EP 90103715 A EP90103715 A EP 90103715A EP 0387584 A2 EP0387584 A2 EP 0387584A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- tubes
- heating gas
- sleeve
- gas draft
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 206010022000 influenza Diseases 0.000 description 2
- 101100008049 Caenorhabditis elegans cut-5 gene Proteins 0.000 description 1
- 241000209035 Ilex Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
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
- F24H9/00—Details
- F24H9/0005—Details for water heaters
- F24H9/0036—Dispositions against condensation of combustion products
-
- 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
- F24H1/26—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 the water mantle forming an integral body
- F24H1/263—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 the water mantle forming an integral body with a dry-wall combustion chamber
Definitions
- the invention relates to a Walkergaszugrohr according to the preamble of the main claim.
- Hot gas flue pipes of the type mentioned are generally known and are used in a wide variety of boiler designs, but their designs differ fundamentally from boilers for smaller output ranges, which are known to contain all areas carrying heating and flue gas in only one room (e.g. relatively large cylinder). So combustion chamber, deflection chamber, heating gas flues and flue gas collection chamber. In contrast, in the boilers of interest, the secondary heating surfaces or hot gas flues are formed by relatively small-diameter pipes (of the order of about 30 to 80 mm in diameter) which pass through the water-carrying part of the boiler housing essentially horizontally above and / or next to the actual combustion chamber.
- Heating gas draft tubes formed from an inner and outer tube are also known from DE-A-33 09 930.
- the pipes are at a relatively large distance from each other, i.e. they enclose an annular gap, which can lead to buckling, particularly of the inner pipe, when exposed to heat.
- spacer elements between the pipes, while according to DE-A-34 40 006, powdery material with a given thermal conductivity is filled between the double pipes after their assembly. In both cases, however, these measures extend over the entire length of the heating gas pipes.
- the invention has for its object to improve a Schusteryakrohr of the type mentioned with simple means to the effect that condensation can be countered in the critical area.
- This inventive measure of incorporating an additional sleeve between the inner and outer tube is as simple as it is effective for preventing the accumulation of condensate in this critical area.
- very thin sheet metal can advantageously be used for the sleeve and on on the other hand, this creates an additional gap which, despite the pipes being pressed together in partial areas, constitutes an additional barrier to heat transfer insofar as areas of the inner pipe covered with it cannot cool down as quickly as if there was only one gap.
- What is essential for the whole is less the additional integration of a thin sleeve, but rather the creation of an additional gap, which, however, can only be imagined as a very fine structural break between adjacent layers of the tubes and the sleeve.
- the sleeve only with a wall thickness of 0.5 to 1.0 mm, preferably 0.75 mm, with this dimension ultimately only the practical handling of the sleeve being decisive, that is, theoretically, one could also provide an even thinner metal foil for the sleeve, but this would be difficult to handle.
- the provision according to the invention of introducing an additional sleeve in the exhaust area of the heating gas draft tube is particularly advantageous in that the fold areas on the fin feet are involved in the heat transfer, i.e. for subclaim 3, protection is only provided within the scope of the present invention claimed.
- the heating gas draft tube according to the invention is explained in more detail below with the aid of the drawing of an exemplary embodiment.
- Fig. 1 only the area 3 of the heating gas draft tube I of interest here is shown, which is of course considerably longer as a whole.
- the inner tube consists of a sheet metal blank that is folded into longitudinal ribs 6 and rounded into a tube.
- the outer tube 1 is applied in a heat-conducting manner in partial areas 8 by all-round pressing.
- there may be a filler 7 which causes the heating gases flowing in the direction of arrow A to flow through the channels 9 delimited by the longitudinal ribs 6.
- a metallic sleeve 4 is pressed in a heat-conducting manner to both tubes.
- the wall thickness W of the sleeve 4 can be dimensioned extremely thin, but this is advantageously dimensioned with a wall thickness of approximately 0.75 mm in order not to impair the handling of the sleeve 4.
- the insertion of the sleeve 4 is absolutely no problem, because it can be inserted between the two pipes 1, 2 before the pressing.
- This configuration of a heating gas draft tube with only two shells and the additional arrangement of a comparatively thin-walled additional sleeve can of course also be used for double-skin heating gas draft tubes if the outer tube is not, as shown in FIG. 1, pressed in parts.
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)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Resistance Heating (AREA)
Abstract
Description
Die Erfindung betrifft ein Heizgaszugrohr gemäß Oberbegriff des Hauptanspruches.The invention relates to a Heizgaszugrohr according to the preamble of the main claim.
Heizgaszugrohre der genannten Art sind allgemein bekannt und werden in den unterschiedlichsten Kesselkonstruktionen benutzt, die sich jedoch in ihren Konstruktionen grundsätzlich von Heizkesseln für kleinere Leistungsbereiche unterscheiden, welche bekanntlich in nur einem Raum (bspw. relativ durchmessergroßer Zylinder) sämtliche heiz- und rauchgasführenden Bereiche enthalten, also Brennkammer, Umlenkkammer, Heizgaszüge und Rauchgassammelkammer. Demgegenüber werden bei den hier interessierenden Kesseln die Nachschaltheizflächen bzw. Heizgaszüge von relativ durchmesserkleinen Rohren (Größenordnung von etwa 30 bis 80 mm im Durchmesser) gebildet, die über und/oder neben dem eigentlichen Brennraum den wasserführenden Teil des Heizkesselgehäuses im wesentlichen horizontal durchgreifen.Hot gas flue pipes of the type mentioned are generally known and are used in a wide variety of boiler designs, but their designs differ fundamentally from boilers for smaller output ranges, which are known to contain all areas carrying heating and flue gas in only one room (e.g. relatively large cylinder). So combustion chamber, deflection chamber, heating gas flues and flue gas collection chamber. In contrast, in the boilers of interest, the secondary heating surfaces or hot gas flues are formed by relatively small-diameter pipes (of the order of about 30 to 80 mm in diameter) which pass through the water-carrying part of the boiler housing essentially horizontally above and / or next to the actual combustion chamber.
Bemühungen, Heizkessel auch im sog. Niedertemperatrurbereich betreiben zu können, sind inzwischen nicht nur auf Heizkessel für kleinere Leistungsbereiche beschränkt geblieben, also solche Kessel, die bspw. für Einfamilienhäuser ausreichen, sondern sind inzwischen auch auf Kessel für größere Leistungsbereiche ausgedehnt worden. Um bei möglichst geringer Heizgaszugrohranzahl die Wärmeübertragungsfläche trotzdem entsprechend groß halten zu können, ist es auch schon bekannt, derartige Rohre innen mit Längsrippen zu versehen, was zweckmäßig auf einfache Weise dadurch bewerkstelligt wird, daß man einen Blechzuschnitt zu Längsrippen faltet und diesen gefalteten Zuschnitt zu einem Rohr rundet, in das äußere Rohr einschiebt und dieses in Teilbereiche an das innere anpreßt (siehe DE-U-85 31 100.6). Diese verpreßten Bereiche sind einerseits dem Wärmeübergang besonders förderlich, andererseits kühlen diese aber auch relativ schnell ab, so daß es dort zu Kondensatniederschlägen kommen kann, die es aber wegen der damit verbundenen Korrosionsgefahr zu verhindern gilt.Efforts to operate boilers in the so-called low-temperature range have meanwhile not only been limited to boilers for smaller output ranges, i.e. those boilers that are sufficient for single-family homes, for example, but have now also been extended to boilers for larger output ranges. In order to be able to keep the heat transfer surface large enough with the smallest possible number of heating gas draft tubes, it is also known to provide such tubes on the inside with longitudinal ribs, which is expediently accomplished in a simple manner by folding a sheet metal blank into longitudinal ribs and rounding this folded blank into a tube, inserting it into the outer tube and pressing it against the inner tube in partial areas (see DE-U-85 31 100.6). On the one hand, these pressed areas are particularly conducive to heat transfer, but on the other hand, they also cool down relatively quickly, so that condensation can occur there, but this must be prevented due to the associated risk of corrosion.
Aus einem Innen- und Außenrohr gebildete Heizgaszugrohre sind auch nach der DE-A-33 09 930 bekannt. Die Rohre haben dabei einen relativ großen Abstand zueinander, d.h., sie schließen einen Ringspalt ein, der bei Wärmebelastung zum Ausknicken insbesondere des Innenrohres führen kann. Um dieser Gefahr zu begegnen, hat man deshalb vorgeschlagen, zwischen den Rohren Distanzelemente anzuordnen, während nach der DE-A-34 40 006 zwischen die Doppelrohre nach deren Zusammenfügung pulverförmiges Material mit gegebener Wärmeleitfähigkeit eingefüllt wird. In beiden Fällen erstrecken sich diese Maßnahmen allerdings über die ganze Länge der Heizgaszugrohre.Heating gas draft tubes formed from an inner and outer tube are also known from DE-A-33 09 930. The pipes are at a relatively large distance from each other, i.e. they enclose an annular gap, which can lead to buckling, particularly of the inner pipe, when exposed to heat. In order to counter this danger, it has therefore been proposed to arrange spacer elements between the pipes, while according to DE-A-34 40 006, powdery material with a given thermal conductivity is filled between the double pipes after their assembly. In both cases, however, these measures extend over the entire length of the heating gas pipes.
Der Erfindung liegt die Aufgabe zugrunde, ein Heizgaszugrohr der eingangs genannten Art mit einfachen Mitteln dahingehend zu verbessern, daß einem Kondensatniederschlag im dafür kritischen Bereich begegnet werden kann.The invention has for its object to improve a Heizgaszugrohr of the type mentioned with simple means to the effect that condensation can be countered in the critical area.
Diese Aufgabe ist mit einem Heizgaszugrohr der eingangs genannten Art nach der Erfindung durch die im Kennzeichen des Hauptanspruches angeführten Merkmale gelöst. Vorteilhafte Weiterbildungen ergeben sich nach den Unteransprüchen.This object is achieved with a Heizgaszugrohr of the type mentioned according to the invention by the features stated in the characterizing part of the main claim. Advantageous further developments result from the subclaims.
Diese erfindungsgemäße Maßnahme der Einbindung einer zusätzlichen Hülse zwischen dem inneren und äußeren Rohr ist ebenso einfach wie für die Verhinderung eines Kondensatanfalles in diesem kritischen Bereich wirksam. Einerseits kann für die Hülse vorteilhaft sehr dünnes Blech verwendet werden und an dererseits entsteht dadurch ein zusätzlicher Spalt, der trotz Verpressung der Rohre in Teilbereichen zueinander für den Wärmeübergang insofern eine zusätzliche Barriere darstellt, als damit abgedeckte Bereiche des Innenrohres nicht mehr so schnell auskühlen können, als wenn nur ein Spalt vorläge. Wesentlich beim Ganzen ist also weniger die zusätzliche Einbindung einer dünnen Hülse, sondern die Gewinnung eines zusätzlichen Spaltes, den man sich allerdings lediglich als sehr feine Strukturunterbrechung zwischen benachbarte Lagen der Rohre und der Hülse vorzustellen hat. Insofern genügt es, die Hülse lediglich mit einer Wandstärke von 0,5 bis 1,0 mm, vorzugsweise mit 0,75 mm zu bemessen, wobei für diese Bemessung letztlich nur noch die zweckmäßige Handhabbarkeit der Hülse maßgebend ist, d.h., theoretisch könnte man auch für die Hülse eine noch wesentlich dünnere Metallfolie vorsehen, was jedoch mit einer schwierigen Handhabung verbunden wäre. Für die Ausbildung des Innenrohres mittels Längsrippen ist die erfindungsgemäße Maßgabe der Einbringung einer zusätzlichen Hülse im Abzugsbereich des Heizgaszugrohres insofern besonders vorteilhaft, als hierbei insbesondere die Faltbereiche an den Rippenfüßen am Wärmeübergang beteiligt sind, d.h. für den Unteranspruch 3 wird Schutz nur im Rahmen der vorliegenden Erfindung beansprucht.This inventive measure of incorporating an additional sleeve between the inner and outer tube is as simple as it is effective for preventing the accumulation of condensate in this critical area. On the one hand, very thin sheet metal can advantageously be used for the sleeve and on on the other hand, this creates an additional gap which, despite the pipes being pressed together in partial areas, constitutes an additional barrier to heat transfer insofar as areas of the inner pipe covered with it cannot cool down as quickly as if there was only one gap. What is essential for the whole is less the additional integration of a thin sleeve, but rather the creation of an additional gap, which, however, can only be imagined as a very fine structural break between adjacent layers of the tubes and the sleeve. In this respect, it is sufficient to dimension the sleeve only with a wall thickness of 0.5 to 1.0 mm, preferably 0.75 mm, with this dimension ultimately only the practical handling of the sleeve being decisive, that is, theoretically, one could also provide an even thinner metal foil for the sleeve, but this would be difficult to handle. For the formation of the inner tube by means of longitudinal ribs, the provision according to the invention of introducing an additional sleeve in the exhaust area of the heating gas draft tube is particularly advantageous in that the fold areas on the fin feet are involved in the heat transfer, i.e. for
Das erfindungsgemäße Heizgaszugrohr wird nachfolgend anhand der zeichnerischen Darstellung einer Ausführungsbeispiels näher erläutert.The heating gas draft tube according to the invention is explained in more detail below with the aid of the drawing of an exemplary embodiment.
Es zeigt
- Fig. 1 einen Längsschnitt durch das Heizgaszugrohr;
- Fig. 2 einen Querschnitt durch das Heizgaszugrohr und
- Fig. 3 eine Abwicklung des Zuschnittes für die Hülse in besonderer Ausführungsform.
- 1 shows a longitudinal section through the Heizgaszugrohr.
- Fig. 2 shows a cross section through the Heizgaszugrohr and
- Fig. 3 is a development of the blank for the sleeve in a special embodiment.
In Fig. 1 ist nur der hier interessierende abzugsseitige Bereich 3 des Heizgaszugrohres I dargestellt, das im Ganzen natürlich wesentlich länger ist. Dargestellt ist ferner eine Ausführungsform des Heizgaszugrohres, bei dem das innere Rohr, wie aus Fig. 2 ersichtlich, aus einem Blechzuschnitt besteht, der zu Längsrippen 6 gefaltet und zu einem Rohr gerundet ist. Wie ferner aus Fig. 1 ersichtlich, ist das äußere Rohr 1 in Teilbereichen 8 durch Rundumverpressungen wärmeleitend dicht angelegt. Im Freiraum zwischen den Längsrippen 6 kann sich, wie ebenfalls aus Fig. 2 ersichtlich, ein Füllkörper 7 befinden, der bewirkt, daß die in Pfeilrichtung A durchströmenden Heizgase die von den Längrippen 6 begrenzten kanäle 9 durchströmen.In Fig. 1 only the
Wesentlich ist nun, daß nur im abzugsseitigen Bereich 3 zwischen dem äußeren Rohr 1 und dem inneren Rohr 2 eine metallische Hülse 4 wärmeleitend zu beiden Rohren eingepreßt angeordnet ist. Wie vorerwähnt, kann die Wandstärke W der Hülse 4 extrem dünn bemessen werden, vorteilhaft wird diese aber mit einer Wandstärke von ca. 0,75 mm bemessen, um die Handhabbarkeit der Hülse 4 nicht zu beeinträchtigen. Die Einbringung der Hülse 4 ist absolut problemlos,weil diese vor dem Verpressen der beiden Rohre 1, 2 zwischen diese eingeschoben werden kann.It is essential that only in the
Da derartige Heizgaszugrohre I im eingebauten Zustand im wasserführenden Innenraum eines Heizkessels von unten in Pfeilrichtung B angeströmt werden, ist die Hülse 4 bzw. deren Blechzuschnitt 4′ vorteilhaft im Sinne der Fig. 3 zugeschnitten und dann zur Hülse gerundet. Dadurch ergibt sich eine Ausbildung des Heizgaszugrohres derart, daß die Hülse 4 zur Zuströmseite Z des Rohres I hin mit einem Schräganschnitt 5 versehen und mit ihrer längsten Mantellinie (beim Ausfüh rungsbeispiel ist das ein ganzer Mittelstreifen MS) "unten", d.h., zur Anströmseite B hin angeordnet ist. Diese Ausbildung eines an sich nur zweischaligen Heizgaszugrohres mit der zusätzlichen Anordnung einer vergleichsweise dünnwandigen zusätzlichen Hülse kann selbstverständlich auch für zweischalige Heizgaszugrohre zur anwendung gebracht werden, wenn das äußere Rohr nicht, wie in Fig. 1 dargestellt, in Teilbereichen verpreßt angeordnet ist.Since such Heizgaszugrohre I flow in the installed state in the water-bearing interior of a boiler from below in the direction of arrow B, the
Claims (4)
dadurch gekennzeichnet,
daß im abzugsseitigen Bereich (3) zwischen dem äußeren Rohr (1) und dem inneren Rohr (2) eine metallische Hülse (4) wärmeleitend zu beiden Rohren (1, 2) eingepreßt angeordnet ist, wobei die Wandstärke (W) der Hülse (4) dünner ausgebildet ist als die der beiden Rohre (1, 2).1.Heating gas draft tube, in particular for low-temperature boilers, in which several heating gas draft tubes are arranged from a combustion or inflow or deflection chamber, penetrating the water-carrying interior of the boiler housing essentially horizontally, running to a flue gas collecting chamber, and each heating gas draft tube (1) consists of two one inside the other arranged tubes (1, 2) is formed, the outer tube (1) being pressed onto the inner tube in a heat-conducting manner, at least in the extraction side half, and the inner tube (2) is provided with longitudinal ribs (6),
characterized,
that in the exhaust-side area (3) between the outer tube (1) and the inner tube (2) a metallic sleeve (4) is arranged in a heat-conducting manner to both tubes (1, 2), the wall thickness (W) of the sleeve (4 ) is formed thinner than that of the two tubes (1, 2).
dadurch gekennzeichnet,
daß die Wandstärke (W) der Hülse (4) mit 0,5 bis 1,0 mm, vorzugsweise mit 0,75 mm bemessen ist.2. Heizgaszugrohre according to claim 1,
characterized,
that the wall thickness (W) of the sleeve (4) is dimensioned with 0.5 to 1.0 mm, preferably with 0.75 mm.
dadurch gekennzeichnet,
daß die Hülse (4) zur Zuströmseite (Z) des Rohres hin mit einem Schräganschnitt (5) versehen und mit ihrer längsten Mantellinie (M) unten zwischen den beiden Rohren (1, 2) angeordnet ist.3. Heizgaszugrohr according to claim 1 or 2,
characterized,
that the sleeve (4) to the inflow side (Z) of the tube with a bevel cut (5) and with it longest surface line (M) is arranged below between the two tubes (1, 2).
dadurch gekennzeichnet,
daß das innere Rohr (2) aus zu einem Rohr gerundeten Blechzuschnitt gebildet ist und dessen Längsrippen (6) aus dem Blechzuschnitt gefaltet sind.4. Heizgaszugrohr according to any one of claims 1 to 3,
characterized,
that the inner tube (2) is formed from a sheet metal blank rounded to a tube and its longitudinal ribs (6) are folded from the sheet metal blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90103715T ATE83062T1 (en) | 1989-03-11 | 1990-02-26 | HEATING GAS PIPE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8903022U DE8903022U1 (en) | 1989-03-11 | 1989-03-11 | Heating gas flue pipe |
| DE8903022U | 1989-03-11 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0387584A2 true EP0387584A2 (en) | 1990-09-19 |
| EP0387584A3 EP0387584A3 (en) | 1991-03-13 |
| EP0387584B1 EP0387584B1 (en) | 1992-12-02 |
Family
ID=6837007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90103715A Expired - Lifetime EP0387584B1 (en) | 1989-03-11 | 1990-02-26 | Heating gas draft tube |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0387584B1 (en) |
| AT (1) | ATE83062T1 (en) |
| DE (2) | DE8903022U1 (en) |
| ES (1) | ES2036853T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1008819A2 (en) | 1998-12-11 | 2000-06-14 | Vulcano-Sadeca, S.A. | Hot water generator for operation at low temperature |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9103302U1 (en) * | 1991-03-18 | 1992-07-23 | Vießmann, Hans, Dr., 3559 Battenberg | Three-pass boiler |
| DE19511021C2 (en) * | 1995-03-28 | 1998-10-01 | Centrotherm Abgastechnik Gmbh | Pipe section for an air-exhaust gas guide |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE337324C (en) * | 1919-01-14 | 1921-05-30 | Hugo Junkers | Protective device on liquid heaters |
| DE3205119A1 (en) * | 1982-02-12 | 1983-08-25 | Hans Dr.h.c. 3559 Battenberg Vießmann | Heating boiler for liquid or gaseous fuels |
| DE8531100U1 (en) * | 1985-11-04 | 1987-10-29 | Vießmann, Hans, Dr.h.c., 3559 Battenberg | Heating gas flue pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3309930A1 (en) * | 1983-03-19 | 1984-09-20 | August Brötje GmbH & Co, 2902 Rastede | Heating boiler with a boiler heating surface of inner and outer shells arranged at a predetermined spacing from each other |
| DE3440006A1 (en) * | 1984-11-02 | 1986-05-07 | Buderus Ag, 6330 Wetzlar | HEATING BOILER |
-
1989
- 1989-03-11 DE DE8903022U patent/DE8903022U1/en not_active Expired - Lifetime
-
1990
- 1990-02-26 EP EP90103715A patent/EP0387584B1/en not_active Expired - Lifetime
- 1990-02-26 AT AT90103715T patent/ATE83062T1/en not_active IP Right Cessation
- 1990-02-26 ES ES199090103715T patent/ES2036853T3/en not_active Expired - Fee Related
- 1990-02-26 DE DE9090103715T patent/DE59000520D1/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE337324C (en) * | 1919-01-14 | 1921-05-30 | Hugo Junkers | Protective device on liquid heaters |
| DE3205119A1 (en) * | 1982-02-12 | 1983-08-25 | Hans Dr.h.c. 3559 Battenberg Vießmann | Heating boiler for liquid or gaseous fuels |
| DE8531100U1 (en) * | 1985-11-04 | 1987-10-29 | Vießmann, Hans, Dr.h.c., 3559 Battenberg | Heating gas flue pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1008819A2 (en) | 1998-12-11 | 2000-06-14 | Vulcano-Sadeca, S.A. | Hot water generator for operation at low temperature |
| EP1008819A3 (en) * | 1998-12-11 | 2002-09-25 | Vulcano-Sadeca, S.A. | Hot water generator for operation at low temperature |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8903022U1 (en) | 1990-07-19 |
| EP0387584A3 (en) | 1991-03-13 |
| ATE83062T1 (en) | 1992-12-15 |
| ES2036853T3 (en) | 1993-06-01 |
| DE59000520D1 (en) | 1993-01-14 |
| EP0387584B1 (en) | 1992-12-02 |
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