EP0816775B1 - Gasbeheizter Umlauf-Wasserheizer - Google Patents
Gasbeheizter Umlauf-Wasserheizer Download PDFInfo
- Publication number
- EP0816775B1 EP0816775B1 EP97108554A EP97108554A EP0816775B1 EP 0816775 B1 EP0816775 B1 EP 0816775B1 EP 97108554 A EP97108554 A EP 97108554A EP 97108554 A EP97108554 A EP 97108554A EP 0816775 B1 EP0816775 B1 EP 0816775B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion chamber
- heat exchanger
- water
- line
- line segment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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
- 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
- F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- 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
- F24H1/44—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with combinations of two or more of the types covered by groups F24H1/24 - F24H1/40 , e.g. boilers having a combination of features covered by F24H1/24 - F24H1/40
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- 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
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
- F28F21/083—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/085—Heat exchange elements made from metals or metal alloys from copper or copper alloys
Definitions
- the invention is based on a gas-heated circulation water heater according to the preamble of claim 1.
- the Combustion chamber cooling line section to a between the Return connection and the input of the heat exchanger lying Location of the pipe system connected.
- the water cooling the combustion chamber does not have one or only slightly above the temperature of the heating return water lying temperature so that it is in operation in the low temperature range or in partial load operation for condensation can come on the combustion chamber walls.
- NL-A 84 03 088 is a gas water heater for Hot water preparation with one charged by the combustion gases Heat exchanger and a combustion chamber known.
- the combustion chamber has a line section for cooling the same.
- the line section for cooling the Combustion chamber is leading to that through the heat exchanger Line system connected.
- the arrangement according to the invention according to claim 1 has the advantage that the Water flowing along the combustion chamber walls in the heat exchanger is heated, so that only at extremely low return temperatures (less than 25 ° C) condensate in small quantities occurs in the channels arranged at the lower edge of the combustion chamber be collected until evaporation or evaporation can.
- a fitting, monitoring, cleaning and if necessary the exchange of the gas burner and the heat exchanger lightening execution arises when the combustion chamber with a separately executed, detachable on its side walls attachable front wall is provided.
- the front wall is also carried out cooled by a line section, on the input side downstream of the heat exchanger the pipe system is connected.
- the line section cooling the front wall is advantageous so dimensioned and on the output side so to the pipe system connected that it as a device bypass for the minimum amount of circulating water serves. This means besides good cooling the front wall is also a prerequisite for good control behavior created how they ensure the minimum circulation quantity represents. So far for this purpose, devices with hot water preparation reversing valves with defined Leakage used. These valves can be in the arrangement according to the invention by the generally used Replace types with a tight seal.
- Stainless steel wall panels are made using local Formations for the formation of channels for the heating water are provided, the condensation and the Corrosion attack can be further counteracted, if the wall panels are through along the channel edges running welds are interconnected and the Channels after welding by molding the between the welded sheet metal areas by means of one inserted with pressure between the wall plates fluid or gaseous working fluid are formed. at this version can be particularly cheap Ratio of flow cross-section of the channels to the Reach wall surfaces of the combustion chamber.
- Figure 1 shows schematically the network plan of a Circulation water heater for heating and domestic water heating
- Figure 2 shows a partial section through a wall of the combustion chamber of the water heater according to Figure 1
- Figure 3 is a side view a lamella of the heat exchanger of the water heater Figure 1
- Figure 4 shows a section along the line IV-IV in Figure 3.
- the circulating water heater has a return connection 10 for one indicated heating network 12, of which a line 14 via a changeover valve 16 leads to the input of a pump 18, whose output via a line 20 with a cooling section in a gas burner 22 is connected.
- a line 14 via a changeover valve 16 leads to the input of a pump 18, whose output via a line 20 with a cooling section in a gas burner 22 is connected.
- From the heat exchanger 26 leads a line 30 to the input one in the rear wall and the Sidewalls of the combustion chamber 28 integrated, below line section 32 described in more detail, whose Output via a line 34 with a flow connection 36 is connected to the heating network 12.
- To line 34 is a branch line 38 connected by a Heat exchanger 40 for process water through to Changeover valve 16 leads.
- the front wall 41 of the combustion chamber 28 is separate Component executed that releasably on the side walls of the Combustion chamber is attachable.
- the front wall 41 is one own line section 42 integrated, the input side connected via line 44 to line 34 and on the output side via a line 46 to the input of the Pump 18 is connected.
- the walls of the combustion chamber 28 are as can be seen from FIG. 2, each made of 2 wall sheets 48.50 Made of stainless steel, the specified seam lines 52 welded together and then between the seam lines 52 by a fluid gaseous working medium under pressure are deformed to form channels.
- the channels 54 in the Form rear wall and in the side walls of the combustion chamber 28 the line section 32, whereas the channels 54 in the Front wall 41 form the line section 42.
- the flow resistance of the line section 42 is so dimensioned that the line connection from the exit of the Line section 32 to the input of the pump 18 as Device bypass serves for the minimum amount of circulating water. Therefore is a commonly used type for the switching valve 16 provided with a tight seal. That in the Pipe sections 32 and 42 flowing water is in the Heat exchanger 26 heated up so far that condensate the combustion chamber walls only when operating in Low temperature range or in low load operation in low Can form sets.
- the special procedure for forming the Channels 54 in the combustion chamber walls also ensure that gaps between the wall plates 48.50 to the Can not form longitudinal edges of the channels 54, whereby corrosion of the combustion chamber is also counteracted becomes.
- the heat exchanger 26 is a lamella block with fins 56 made of ferritic stainless steel and passed through Water pipes 58 made of copper. Each slat is 56 at their passage opening with a collar-like passage 60 provided which tightly encloses the water pipe 58.
- the combustion chamber side edge 62 of the fins 56 is between the Water pipes 58 pulled up to the so-called Limit light length not to be exceeded, d. i.e. to a The slats 56 overheat in these areas avoid. Between the edge 62 and the combustion chamber side Peak areas of the passages 60 result Slat areas 64, the height h as large as that Evaporation distance is dimensioned, along which the Passages 60 formed or accumulating condensate 66th evaporated.
- the length of the evaporation path depends on the temperature of water in the respective water pipe 58 and may not exceed correspond to the limit incandescent length.
- Slat wall thickness can be ensured that the Limit light length at least as large as the required Inlet section at the lamella areas 64.
- the height h n in the lamella areas 64 is gradually reduced towards the output of the heat exchanger down to the value h 1 .
- the lamella areas 68 encompassing the upper apex areas of the water pipes 58 are increasingly of dimension b towards the exit of the heat exchanger n shortened to dimension b 1 .
- the measures described above are combined with the feature that the free distance d between two adjacent slats 56 not the dimension of 2.7 mm exceeds. This ensures that Capillary action of the condensate on the fins 56 to is held for its evaporation.
- the distance is d determined by the height a of the passage 60 on the lamella 56, at the bend radius of the adjacent lamella passage is applied.
- the surface of the Water pipes 58 completely through the precious metal of the fins covered, so that there are none at these points Can form corrosion products.
- the Width e and its length k are such that they are the Slat gaps at least over the closest distance 1 cover approximately between the water pipes 58. Thereby prevents that above the heat exchanger The resulting corrosion products fall through on the burner.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Geometry (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Description
Claims (5)
- Gasbeheizter Umlauf-Wasserheizer, mit einem Rücklaufanschluß (10) und einem Vorlaufanschluß (36) für ein externes Heizungsnetz, und mit einem beide Anschlüsse verbindenden, über eine Pumpe (18) und einen von den Verbrennungsgasen beaufschlagten Wärmeübertrager (26) führenden Leitungssystem, das einen Leitungsabschnitt (32) enthält, der eine zwischen Gasbrenner (22) und Wärmeübertrager (26) angeordnete Brennkammer (28) kühlend an deren Wände entlanggeführt bzw. in deren Wände integriert ist, wobei der die Brennkammer (28) kühlende Leitungsabschnitt (32) eingangsseitig an den Ausgang des von den Verbrennungsgasen beaufschlagten Wärmeübertragers (26) angeschlossen ist, dadurch gekennzeichnet, dass der die Brennkammer (28) kühlende Leitungsabschnitt (32) im Zuge der Verbindung vom Wärmeübertrager (26) zum Vorlaufanschluß (36) liegt, dass eine vom Rücklaufanschluß (10) zum Wärmeübertrager (26) führende Rücklaufleitung vorgesehen ist, in die die Pumpe (18) integriert ist, und dass der die Brennkammer (28) kühlende Leitungsabschnitt (32) in Strömungsrichtung vor der Pumpe (18) in die Rücklaufleitung führt.
- Wasserheizer nach Anspruch 1, dessen Brennkammer (28) eine getrennt ausgeführte, lösbar an ihren Seitenwänden befestigbare Vorderwand hat, dadurch gekennzeichnet, daß die Vorderwand (41) ebenfalls gekühlt ist durch einen Leitungsabschnitt (42), der eingangsseitig stromab des Wärmeübertragers (26) an das übrige Leitungssystem angeschlossen ist.
- Wasserheizer nach Anspruch 2, dadurch gekennzeichnet, daß der die Vorderwand (41) kühlende Leitungsabschnitt (42) so bemessen und ausgangsseitig so an das Leitungssystem angeschlossen ist, daß er als Gerätebypass für die Mindestumlaufwassermenge dient.
- Wasserheizer nach einem der vorhergehenden Ansprüche, mit einer Brennkammer deren Wände je aus zwei aneinander anliegenden, miteinander verschweißten Wandblechen aus Edelstahl bestehen, die mit örtlichen Ausformungen zur Bildung von Kanälen für das Heizungswasser versehen sind, dadurch gekennzeichnet, daß die Wandbleche (48, 50) durch entlang der Kanalränder verlaufende Schweißnähte (52) miteinander verbunden sind und die Kanäle (54) nach dem Verschweißen durch Ausformungen der zwischen den Schweißnähten (52) sich befindenden Blechbereiche mittels eines mit Preßdruck zwischen die Wandbleche (48, 50) eingeführten fluiden oder gasförmigen Arbeitsmittels gebildet sind.
- Wasserheizer nach einem der vorhergehenden Ansprüche, mit einem Wärmeübertrager, der Wasserrohre aus gegenüber Wasser korrosionsfestem Material und Lamellen aus Edelstahl hat, gekennzeichnet durch folgende Merkmale:a) die Höhe h der die Wasserrohre (58) brennraumseitig umgreifenden Lamellenbereiche (64) ist so bemessen, daß an den Wasserrohren (58) bzw. Lamellendurchzügen (60) anfallendes, in die Lamellenbereiche (64) gelangendes Kondensat verdampft, undb) der Lamellenabstand d ist so bemessen, daß zwischen den Lamellen 56 sich bildendes Kondensat durch Kapillarkraftwirkung gegen Abtropfen gehalten ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19626321 | 1996-07-01 | ||
DE19626321A DE19626321A1 (de) | 1996-07-01 | 1996-07-01 | Gasbeheizter Umlauf-Wasserheizer |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0816775A2 EP0816775A2 (de) | 1998-01-07 |
EP0816775A3 EP0816775A3 (de) | 1998-12-23 |
EP0816775B1 true EP0816775B1 (de) | 2002-09-25 |
Family
ID=7798530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97108554A Expired - Lifetime EP0816775B1 (de) | 1996-07-01 | 1997-05-28 | Gasbeheizter Umlauf-Wasserheizer |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0816775B1 (de) |
DE (2) | DE19626321A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0994321B1 (de) * | 1998-10-13 | 2004-08-18 | Robert Bosch Gmbh | Wärmeübertrager für brennstoffbeheizte Wassererhitzer |
ATE261568T1 (de) * | 2001-06-18 | 2004-03-15 | Bruno Della Gaspera | Wärmetauschvorrichtung, insbesondere fussleistenheizung |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2050273A1 (de) * | 1969-07-11 | 1971-04-02 | Calotech Ets | |
DE2742854C2 (de) * | 1977-09-23 | 1985-05-02 | Robert Bosch Gmbh, 7000 Stuttgart | Wassererhitzer mit einem Gas- oder Ölbrenner |
NL8403088A (nl) * | 1984-10-10 | 1986-05-01 | Fasto Bv | Geiser voor het bereiden van warm water. |
FR2595796B1 (fr) * | 1986-03-14 | 1988-06-17 | Chaffoteaux Et Maury | Perfectionnements aux corps de chauffe pour chauffe-eau a gaz |
JP3030036B2 (ja) * | 1989-08-23 | 2000-04-10 | 昭和アルミニウム株式会社 | 複式熱交換器 |
DE4224212A1 (de) * | 1991-07-22 | 1993-01-28 | Vaillant Joh Gmbh & Co | Doppelwandiger heizschacht |
-
1996
- 1996-07-01 DE DE19626321A patent/DE19626321A1/de not_active Withdrawn
-
1997
- 1997-05-28 DE DE59708303T patent/DE59708303D1/de not_active Expired - Lifetime
- 1997-05-28 EP EP97108554A patent/EP0816775B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0816775A2 (de) | 1998-01-07 |
DE19626321A1 (de) | 1998-01-08 |
EP0816775A3 (de) | 1998-12-23 |
DE59708303D1 (de) | 2002-10-31 |
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