EP0473946B1 - Sectional boiler - Google Patents
Sectional boiler Download PDFInfo
- Publication number
- EP0473946B1 EP0473946B1 EP91113075A EP91113075A EP0473946B1 EP 0473946 B1 EP0473946 B1 EP 0473946B1 EP 91113075 A EP91113075 A EP 91113075A EP 91113075 A EP91113075 A EP 91113075A EP 0473946 B1 EP0473946 B1 EP 0473946B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- boiler
- water
- sectional heating
- elements
- region
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- F24H1/22—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
- F24H1/30—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 being built up from sections
- F24H1/32—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 being built up from sections with vertical sections arranged side by side
Definitions
- the invention relates to a sectional boiler with a plurality of boiler sections arranged parallel and vertically next to one another, consisting of two end and / or one or more central boiler sections, preferably made of cast material, with a combustion chamber in the lower region of the sectional boiler and above it vertical gas discharge channels arranged between the boiler sections, the boiler sections being rectangular to a square floor plan, in the area of a floor plan corner a flow hub, in the area of an opposite floor plan corner a return hub and a water space connecting both hubs.
- the boiler sections are made of gray cast iron. Versions made of aluminum or copper are possible. In the known designs, the water space between the supply hub and the return hub extends essentially over the entire surface area of the boiler element, so that the ratio of the heating surfaces in contact with gas or water is almost 1: 1.
- the outer sides of the boiler elements in contact with the gas can be provided with ribs, knobs or the like to improve the heat transfer. Although the ribs, knobs or Such the gas-contacting outer sides lead to an increase in the wall temperature of the boiler elements, which are generally suspended in a vertical orientation, the gases passing by on the outer sides cool down so quickly while maintaining low water temperatures that the dew point temperature of the gases is reached quickly. The dew point temperature of the gases is around 52 ° Celsius. The consequence of this is that those areas on the outer sides of the boiler elements which are swept by gases with temperatures below the dew point temperature corrode. This affects not only the heat transfer but also the flow conditions in the sectional boiler.
- the object of the invention is to improve a sectional boiler of the type described above in such a way that the dew point temperature is not fallen below if possible at low water temperatures on the gas-contacting heating surfaces.
- the water space adjoining the return hub extends only in the region of the lower half of the boiler element and in that the water space is connected to the feed hub via at least one water channel.
- the water space should extend over 30-80%, preferably 60% ⁇ 5% of the height of the boiler element.
- the width of the water channel can be about 1/8 to 3/4 of the boiler section width.
- water cooling of the boiler section walls takes place essentially only in the area of the water space, that is, where the gases passing by the boiler section still have sufficiently high temperatures.
- non-water-carrying areas of the boiler element are at least partially cast hollow.
- the shift in the dew point line explained at the outset is not adversely affected thereby.
- the water channel and / or the water space can also be double-walled, with heat-conducting bridges being arranged evenly distributed between the wall side in contact with the exhaust gas and the water in contact with the wall.
- the invention proposes that water-filled heating surfaces protrude from the water chamber of the central boiler sections below into the combustion chamber.
- the boiler element 1 shown in FIGS. 1, 1a is arranged together with similar boiler elements 1, E, M in a vertical orientation as in a sectional boiler shown in FIG. 4.
- the boiler member 1 is made of gray cast iron. Versions made of aluminum or copper are possible.
- the boiler member 1 has a rectangular to square plan and in the area of a plan corner a lead hub 2, in the area of the diametrically opposed plan corner a return hub 3 and a water space 4 connecting both hubs.
- the water space 4 extends over the entire width B of the embodiment shown Boiler link and about 30-80% of the height H of the boiler link.
- the water space 4 is connected to the lead hub 2 via the water channel 5 extending from its upper edge.
- the width of the water channel 5 corresponds to approximately 1/8 of the width B of the boiler element. In other versions, several water channels can also be provided.
- the non-water-carrying areas 6 of the boiler element 1 can be cast hollow. This is not shown in detail.
- the water channel 5a is designed to be substantially wider and double-walled in comparison to that in FIG. It can be seen in particular from FIG. 1b that the exhaust gas-touching A and the water-touching W wall sides are connected to one another via heat-conducting bridges 8.
- FIG. 2 shows the temperature distribution on the outer sides of the boiler element 1 when working with normal exhaust gas temperatures and through the boiler element 1 conducted water is only heated to moderate temperatures in the range of up to 40 ° Celsius.
- the wall temperatures of the boiler element 1 at the lower edge are approximately 118 ° Celsius and in the area of the water space 4 are 100 ° Celsius.
- the dew point temperature of 52 ° Celsius is only reached or fallen below in the upper left area near the lead hub 2.
- the dew point line (52 ° Celsius) can, however, also be shifted beyond the feed hub 2 if a heating surface 7 which increases the boiler link height is connected to the boiler element 1 above the feed hub 2. Then the dew point temperature of 52 ° Celsius in the area of the boiler element 1 is no longer reached or fallen below.
- FIG. 3 shows the temperature distribution on a boiler element of conventional design, in which the water space extends over the entire plan area between the supply hub 2 and the return hub 3. It can be seen that the dew point temperature of 52 ° Celsius is already reached in the lower half of the boiler section. In addition, the boiler walls have significantly lower temperatures.
- Fig. 4 shows the arrangement of several boiler sections side by side, two end boiler sections E receiving two middle boiler sections M between them. These boiler sections are all connected on the water side to the supply hub 2 and return hub 3. Below the central boiler sections M is the combustion chamber F with the burner B lying horizontally. From the combustion chamber F, the flue gases move vertically upwards through the gas exhaust ducts G and then to the chimney.
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- 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)
- Incineration Of Waste (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Description
Die Erfindung betrifft einen Gliederheizkessel mit mehreren parallel senkrecht nebeneinander angeordneten Kesselgliedern bestehend aus zwei End- und/oder einem oder mehreren Mittelkesselgliedern bevorzugt aus Gußwerkstoff, mit einem Feuerraum im unteren Bereich des Gliederheizkessels und darüber zwischen den Kesselgliedern angeordneten senkrechten Gasabzugskanälen, wobei die Kesselglieder einen rechteckigen bis quadratischen Grundriß, im Bereich einer Grundrißecke eine Vorlaufnabe, im Bereich einer gegenüberliegenden Grundrißecke eine Rücklaufnabe und einen beide Naben verbindenden Wasserraum aufweisen.The invention relates to a sectional boiler with a plurality of boiler sections arranged parallel and vertically next to one another, consisting of two end and / or one or more central boiler sections, preferably made of cast material, with a combustion chamber in the lower region of the sectional boiler and above it vertical gas discharge channels arranged between the boiler sections, the boiler sections being rectangular to a square floor plan, in the area of a floor plan corner a flow hub, in the area of an opposite floor plan corner a return hub and a water space connecting both hubs.
Derartige Gliederheizkessel sind aus der Praxis bekannt.Such sectional heating boilers are known from practice.
Die Kesselglieder bestehen aus Grauguß. Ausführungen aus Aluminium oder Kupfer sind möglich. Bei den bekannten Ausführungen erstreckt sich der Wasserraum zwischen der Vorlaufnabe und der Rücklaufnabe im wesentlichen über die gesamte Grundrißfläche des Kesselgliedes, so daß das Verhältnis der gas- bzw. wasserberührten Heizflächen nahezu 1:1 ist. Dabei können die gasberührten Außenseiten der Kesselglieder zur Verbesserung des Wärmeübergangs mit Rippen, Noppen oder dergleichen versehen sein. Obwohl die Rippen, Noppen oder dergleichen der gasberührten Außenseiten zu einer Erhöhung der Wandtemperatur der im allgemeinen in vertikaler Orientierung aufgehängten Kesselglieder führen, kühlen sich die an den Außenseiten vorbeistreichenden Gase bei Einhaltung niedriger Wassertemperaturen so schnell ab,daß die Taupunkttemperatur der Gase schnell erreicht ist. Die Taupunkttemperatur der Gase liegt bei etwa 52° Celsius. Die Folge davon ist, daß diejenigen Bereiche der Außenseiten der Kesselglieder, die von Gasen mit Temperaturen unterhalb der Taupunkttemperatur überstrichen werden, korrodieren. Dasbeeinträchtigt nicht nur den Wärmeübergang sondern auch die Strömungsverhältnisse im Gliederheizkessel.The boiler sections are made of gray cast iron. Versions made of aluminum or copper are possible. In the known designs, the water space between the supply hub and the return hub extends essentially over the entire surface area of the boiler element, so that the ratio of the heating surfaces in contact with gas or water is almost 1: 1. The outer sides of the boiler elements in contact with the gas can be provided with ribs, knobs or the like to improve the heat transfer. Although the ribs, knobs or Such the gas-contacting outer sides lead to an increase in the wall temperature of the boiler elements, which are generally suspended in a vertical orientation, the gases passing by on the outer sides cool down so quickly while maintaining low water temperatures that the dew point temperature of the gases is reached quickly. The dew point temperature of the gases is around 52 ° Celsius. The consequence of this is that those areas on the outer sides of the boiler elements which are swept by gases with temperatures below the dew point temperature corrode. This affects not only the heat transfer but also the flow conditions in the sectional boiler.
Aus der DE-A-22 17 921 ist ein Kessel, insbesondere für Zentralheizungen ersichtlich, mit einer Reihe von nebeneinanderliegenden Elementen mit Wasserumlauf und Abgaskanälen, wobei die Rauchgase im wesentlichen waagerecht und schlangenförmig durch Rauchgaskanäle strömen. Das Wasser strömt dabei durch im wesentlichen rohrförmige Wasserräume, deren Querschnitt im wesentlichen gleich groß ist.From DE-A-22 17 921 a boiler, in particular for central heating systems, can be seen with a number of adjacent elements with water circulation and exhaust gas ducts, the flue gases flowing essentially horizontally and serpentine through flue gas ducts. The water flows through essentially tubular water spaces, the cross section of which is essentially the same size.
Aufgabe der Erfindung ist es, einen Gliederheizkessel der eingangs beschriebenen Gattung so zu verbessern, daß bei niedrigen Wassertemperaturen an den gasberührten Heizflächen die Taupunkttemperatur möglichst nicht unterschritten wird.The object of the invention is to improve a sectional boiler of the type described above in such a way that the dew point temperature is not fallen below if possible at low water temperatures on the gas-contacting heating surfaces.
Diese Aufgabe wird dadurch gelöst, daß der an die Rücklaufnabe anschließende Wasserraum sich nur im Bereich der unteren Hälfte des Kesselgliedes erstreckt und daß der Wasserraum über wenigstens einen Wasserkanal mit der Vorlaufnabe verbunden ist. Insbesondere soll der Wasserraum sich über 30-80%, vorzugsweise 60% ± 5% der Höhe des Kesselgliedes erstrecken. Die Breite des Wasserkanals kann etwa 1/8 bis 3/4 der Kesselgliedbreite betragen. Bei diesem Kesselglied findet eine Wasserkühlung der Kesselgliedwandungen im wesentlichen nur im Bereich des Wasserraums statt, also dort, wo die am Kesselglied vorbeistreichenden Gase noch ausreichend hohe Temperaturen haben. Darüber hinaus können die Gase ihre fühlbare Wärme zwar weiterhin an die nicht wasserführenden Teile des Kesselgliedes abgeben, die Taupunkttemperatur der Gase wird dabei aber nicht unterschritten.
Dementsprechend verschiebt sich die Taupunktlinie bis in den Bereich der Vorlaufnabe. Sie kann auch über die Vorlaufnabe hinaus verschoben werden, wenn an das Kesselglied im Bereich der Vorlaufnabe eine die Kesselgliedhöhe vergrößernde Heizfläche anschließt.This object is achieved in that the water space adjoining the return hub extends only in the region of the lower half of the boiler element and in that the water space is connected to the feed hub via at least one water channel. In particular, the water space should extend over 30-80%, preferably 60% ± 5% of the height of the boiler element. The width of the water channel can be about 1/8 to 3/4 of the boiler section width. In this boiler section, water cooling of the boiler section walls takes place essentially only in the area of the water space, that is, where the gases passing by the boiler section still have sufficiently high temperatures. In addition, you can the gases continue to give off their sensible heat to the non-water-carrying parts of the boiler element, but the dew point temperature of the gases is not fallen below.
Accordingly, the dew point line moves into the area of the feed hub. It can also be moved beyond the feed hub if a heating surface which increases the boiler link height adjoins the boiler section in the area of the feed hub.
Aus gußtechnischen Gründen kann es vorteilhaft sein, wenn die nicht wasserführenden Bereiche des Kesselgliedes wenigstens teilweise hohl gegossen sind. Dadurch wird die eingangs erläuterte Verschiebung der Taupunktlinie nicht negativ beeinflußt.For reasons of casting technology, it can be advantageous if the non-water-carrying areas of the boiler element are at least partially cast hollow. The shift in the dew point line explained at the outset is not adversely affected thereby.
Außerdem kann erfindungsgemäß der Wasserkanal und/oder der Wasserraum auch doppelwandig ausgeführt sein, wobei zwischen der abgasberührten und wasserberührten Wandseite gleichmäßig verteilt Wärmeleitbrücken angeordnet sind. Schließlich schlägt die Erfindung vor, daß sich an den Wasserraum der Mittelkesselglieder unten in den Feuerraum ragende wassergefüllte Heizflächen anschließen.In addition, according to the invention, the water channel and / or the water space can also be double-walled, with heat-conducting bridges being arranged evenly distributed between the wall side in contact with the exhaust gas and the water in contact with the wall. Finally, the invention proposes that water-filled heating surfaces protrude from the water chamber of the central boiler sections below into the combustion chamber.
Die Erfindung wird anhand der beigefügten Figuren 1 bis 4 beispeilsweise näher erläutert; es zeigen:
- Fig. 1
- in schematischer Darstellung einen Längsschnitt durch ein Kesselglied eines Gliederheizkessels,
- Fig. 1a
- eine doppelwandige Ausführung zu Fig. 1,
- Fig. 1b
- die Ausführung nach Fig. 1a teilweise im senkrechten Schnitt,
- Fig. 2
- schematisch die Temperaturverteilung an den Außenseiten des in Fig. 1 dargestellten Kesselgliedes,
- Fig. 3
- schematisch die Temperaturverteilung eines Kesselgliedes nach dem Stand der Technik,
- Fig. 4
- eine Gesamtdarstellung eines Gliederheizkessels mit parallel angeordneten End- und Mittelkesselgliedern.
- Fig. 1
- a schematic representation of a longitudinal section through a boiler section of a sectional boiler,
- Fig. 1a
- a double-walled version to Fig. 1,
- Fig. 1b
- 1a partially in vertical section,
- Fig. 2
- schematically the temperature distribution on the outside of the boiler element shown in Fig. 1,
- Fig. 3
- schematically the temperature distribution of a boiler element according to the prior art,
- Fig. 4
- an overall view of a sectional boiler with parallel arranged end and middle boiler sections.
Das in den Figuren 1, 1a dargestellte Kesselglied 1 wird zusammen mit gleichartigen Kesselgliedern 1, E, M in vertikaler Ausrichtung wie in einem in Fig. 4 dargestellten Gliederkessel angeordnet. Beim dargestellten Ausführungsbeispiel besteht das Kesselglied 1 aus Grauguß. Ausführungen aus Aluminium oder Kupfer sind möglich.The
Das Kesselglied 1 besitzt einen rechteckigen bis quadratischen Grundriß und im Bereich einer Grundrißecke eine Vorlaufnabe 2, im Bereich der diametral gegenüberliegenden Grundrißecke eine Rücklaufnabe 3 und eine beide Naben verbindenden Wasserraum 4. Der Wasserraum 4 erstreckt sich bei der dargestellten Ausführung über die gesamte Breite B des Kesselgliedes sowie über ca. 30-80% der Höhe H des Kesselgliedes. Der Wasserraum 4 ist über den von seinem oberen Rand ausgehenden Wasserkanal 5 mit der Vorlaufnabe 2 verbunden. Die Breite des Wasserkanals 5 entspricht etwa 1/8 der Breite B des Kesselgliedes. Bei anderen Ausführungen können auch mehrere Wasserkanäle vorgesehen sein. Die nicht wasserführenden Bereiche 6 des Kesselgliedes 1 können hohl gegossen sein. Das ist im einzelnen nicht dargestellt.The
In Figur 1a ist der Wasserkanal 5a im Vergleich zu dem nach Figur 1 wesentlich breiter und doppelwandig ausgeführt. Aus Figur 1b ist insbesondere ersichtlich, daß die abgasberührten A und die wasserberührten W Wandseiten über Wärmeleitbrücken 8 miteinander in Verbindung stehen.In FIG. 1a, the
In Figur 2 ist die Temperaturverteilung an den Außenseiten des Kesselgliedes 1 wiedergegeben, wenn mit üblichen Abgastemperaturen gearbeitet wird und das durch das Kesselglied 1 geleitete Wasser nur auf mäßige Temperaturen im Bereich von bis zu 40° Celsius erwärmt wird. Man erkennt in Figur 2, daß die Wandtemperaturen des Kesselgliedes 1 am unteren Rand ca. 118° Celsius betragen und im Bereich des Wasserraums 4 bei 100° Celsius liegen. Die Taupunkt-temperatur von 52° Celsius wird erst im linken oberen Bereich der Nähe der Vorlaufnabe 2 erreicht bzw. unterschritten. Die Taupunktlinie ( 52° Celsius ) kann aber auch über die Vorlaufnabe 2 hinaus verschoben werden, wenn an das Kesselglied 1 oberhalb der Vorlaufnabe 2 eine die Kesselgliedhöhe vergrößernde Heizfläche 7 anschließt. Dann wird im Bereich des Kesselgliedes 1 die Taupunkttemperatur von 52° Celsius überhaupt nicht mehr erreicht bzw. unterschritten.FIG. 2 shows the temperature distribution on the outer sides of the
Figur 3 zeigt zum Vergleich die Temperaturverteilung an einem Kesselglied herkömmlicher Bauart, bei den sich der Wasserraum über die gesammte Grundrißfläche zwischen Vorlaufnabe 2 und Rücklaufnabe 3 erstreckt. Man erkennt, daß die Taupunkttemperatur von 52° Celsius bereits in der unteren Hälfte des Kesselgliedes erreicht wird. Darüber besitzen die Kesselwandungen erheblich niedrigere Temperaturen.For comparison, FIG. 3 shows the temperature distribution on a boiler element of conventional design, in which the water space extends over the entire plan area between the
Fig. 4 zeigt die Anordnung von mehreren Kesselgliedern nebeneinander, wobei zwei Endkesselglieder E zwei Mittelkesselglieder M zwischen sich aufnehmen. Diese Kesselglieder stehen alle wasserseitig mit der Vorlaufnabe 2 unter Rücklaufnabe 3 miteinander in Verbindung. Unterhalb der Mittelkesselglieder M befindet sich der Feuerraum F mit dem waagerecht liegenden Brenner B. Aus dem Feuerraum F ziehen die Rauchgase durch die Gasabzugskanäle G senkrecht nach oben und dann zum Kamin.Fig. 4 shows the arrangement of several boiler sections side by side, two end boiler sections E receiving two middle boiler sections M between them. These boiler sections are all connected on the water side to the
- 11
- KesselgliedBoiler section
- 22nd
- VorlaufnabeLead hub
- 33rd
- RücklaufnabeReturn hub
- 44th
- WasserraumWater room
- 5, 5a5, 5a
- WasserkanalWater channel
- 66
- nicht wasserführender Hohlraumnon-water-bearing cavity
- 77
- HeizflächeHeating surface
- 88th
- WärmeleitbrückeThermal bridge
- AA
- abgasberührte Wandseitewall side in contact with exhaust gas
- WW
- wasserberührte Wandseitewall side in contact with water
- BB
- Brennerburner
- EE
- EndkesselgliedFinal boiler section
- MM
- MittelkesselgliedMiddle boiler section
- FF
- FeuerraumFirebox
- GG
- GasabzugskanalExhaust gas duct
Claims (8)
- A sectional heating boiler with a plurality of parallel boiler elements (1, E, M) disposed vertically side by side, consisting of two end- (E) and/or one or more central boiler elements (M), preferably made of cast material, with a combustion chamber (F) in the lower region of the sectional heating boiler and vertical gas discharge ducts (G) disposed above the combustion chamber between the boiler elements, wherein the boiler elements have a rectangular to square horizontal projection, a flow junction (2) in the region of a corner of the horizontal projection, a return junction (3) in the region of an opposite corner of the horizontal projection, and a water space (4) connecting the two junctions, characterised in that the water space (4) adjoining the return junction (3) only extends in the region of the lower half of the boiler element (1) and that the water space (4) is connected to the flow junction (2) via at least one water channel (5, 5a).
- A sectional heating boiler according to claim 1, characterised in that the water space (4) extends over 30-80% of the height (H) of the boiler element (1).
- A sectional heating boiler according to claim 1 or 2, characterised in that the water space (4) extends over 60% ± 5% of the height (H) of the boiler element (1).
- A sectional heating boiler according to at least one of the preceding claims, characterised in that the width of the water channel (5, 5a) is about 1/8 to 3/4 of the boiler element width (B).
- A sectional heating boiler according to at least one of the preceding claims, characterised in that the water channel (5a) and/or the water arm (4) are of double-walled construction, wherein heat conducting bridges (8) are disposed between the wall side (A) in contact with the flue gas and the wall side (W) in contact with the water.
- A sectional heating boiler according to at least one of the preceding claims, characterised in that a heating surface (7) which increases the boiler element height (H) adjoins the boiler element (1) in the region of the flow junction (2).
- A sectional heating boiler according to at least one of the preceding claims, characterised in that the cavity (6) of the boiler element (1) which does not transport water is cast at least partially hollow.
- A sectional heating boiler according to at least one of the preceding claims, characterised in that water-filled heating surfaces projecting into the combustion chamber (F) adjoin the water space (4) of the central boiler elements (M) at the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT91113075T ATE102333T1 (en) | 1990-08-22 | 1991-08-03 | SECTION BOILER. |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4026507 | 1990-08-22 | ||
| DE4026507 | 1990-08-22 | ||
| DE4116383A DE4116383A1 (en) | 1990-08-22 | 1991-05-18 | LINKED BOILER |
| DE4116383 | 1991-05-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0473946A1 EP0473946A1 (en) | 1992-03-11 |
| EP0473946B1 true EP0473946B1 (en) | 1994-03-02 |
Family
ID=25896111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91113075A Expired - Lifetime EP0473946B1 (en) | 1990-08-22 | 1991-08-03 | Sectional boiler |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0473946B1 (en) |
| DE (2) | DE4116383A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4220987C3 (en) * | 1992-06-26 | 1997-04-24 | Buderus Heiztechnik Gmbh | Sectional boiler |
| DE9312911U1 (en) * | 1993-08-28 | 1993-10-14 | Viessmann Werke Gmbh & Co, 35108 Allendorf | Atmospheric gas boiler |
| DE102004025621B4 (en) * | 2004-05-25 | 2013-12-19 | Robert Bosch Gmbh | heat exchangers |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK16303C (en) * | 1912-08-12 | Strebelwerk Gmbh | Articulated boiler with more than two articulated rows. | |
| FR2134852A5 (en) * | 1971-04-22 | 1972-12-08 | Fonderie Soc Gen De |
-
1991
- 1991-05-18 DE DE4116383A patent/DE4116383A1/en active Granted
- 1991-08-03 EP EP91113075A patent/EP0473946B1/en not_active Expired - Lifetime
- 1991-08-03 DE DE91113075T patent/DE59101086D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE4116383C2 (en) | 1992-11-12 |
| EP0473946A1 (en) | 1992-03-11 |
| DE4116383A1 (en) | 1992-02-27 |
| DE59101086D1 (en) | 1994-04-07 |
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