EP1292797B1 - Wasserheizer mit vorheizer im brennraum - Google Patents

Wasserheizer mit vorheizer im brennraum Download PDF

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Publication number
EP1292797B1
EP1292797B1 EP01941362A EP01941362A EP1292797B1 EP 1292797 B1 EP1292797 B1 EP 1292797B1 EP 01941362 A EP01941362 A EP 01941362A EP 01941362 A EP01941362 A EP 01941362A EP 1292797 B1 EP1292797 B1 EP 1292797B1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
boiler
gap
hot water
vessel
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
Application number
EP01941362A
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English (en)
French (fr)
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EP1292797A1 (de
Inventor
Tage Stanghammar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
COMPUS AB
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COMPUS AB
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Publication date
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Publication of EP1292797A1 publication Critical patent/EP1292797A1/de
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Publication of EP1292797B1 publication Critical patent/EP1292797B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • 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

Definitions

  • the present invention relates to a hot water boiler with a flow heater for tap water, comprising a combustion chamber, an outlet for heating water from a gap-shaped passage arranged around the combustion chamber, a tube coil for tap water arranged in said passage, and an inlet for return heating water.
  • Hot water boilers of the type indicated above are previously known, see for example FR 2121931.
  • Another example of a known boiler is disclosed in FR 1346421.
  • Hot water boilers of this type have been developed with a view to achieving the maximum possible efficiency, preferably in excess of 90%.
  • One main object of the present invention is to produce a hot water boiler with a flow heater for hot tap water, which, while retaining very high efficiency, produces significantly more hot tap water than comparable boilers.
  • Another object is to produce such a boiler which is compact in relation to its production capacity for hot tap water.
  • the invention is based on the knowledge that the above aim can be achieved by utilizing residual heat in the combustion gases in the combustion chamber for effective preheating of return heating water from a heating system connected to the boiler, and by then, during the main heating of the heating water, utilizing the latter for supplementary heating of the hot tap water.
  • a hot water boiler of the type indicated in the first paragraph that it comprises a preheater for return heating water arranged in the combustion chamber, that the preheater has an outlet line which conducts preheated heating water out of the combustion chamber and to the lower part of the boiler, from where the arrangement is such that it can pass upward in the gap-shaped passage surrounding the combustion chamber while being heated by the combustion chamber and transferring heat to the tap water.
  • a hot water boiler of this type has been found to be capable of working with very high efficiency and at the same time producing essentially twice as much tap water as the best boilers currently available on the market.
  • the preheater is made in the form of a double-shelled vessel, the inlet of the vessel being connected to an inner chamber in the vessel, which is connected to a gap-shaped space surrounding the chamber, and the outlet of the vessel being connected to the gap-shaped space.
  • the width of this gap-shaped space is very small to obtain effective preheating of the water.
  • the preheater is in the form of a cylindrical vessel, and the outside of the vessel is provided with a large number of essentially radially directed pins.
  • the length of these pins is only slightly shorter than the width of a gap-shaped passage for flue gases, which is formed between the vessel and the inner shell of the combustion chamber.
  • Fig. 1 shows a first longitudinal section through a hot water boiler according to the invention.
  • Fig. 2 shows a second longitudinal section through the boiler along another section line.
  • Fig. 3 shows the boiler seen from above.
  • reference number 1 designates the outer shell of the boiler, which is provided with insulation 2.
  • Reference number 3 indicates diagrammatically an oil burner which projects into a combustion chamber 4 which is delimited by an inner shell 5.
  • the bottom of the combustion chamber is covered with a layer 6 of refractory material, such as brick.
  • the upper end of the combustion chamber 4 is connected to a chimney 7.
  • Reference number 8 designates an electric heater arranged in the lower part of the boiler for alternative operation of the boiler or for increasing the power of the boiler.
  • the boiler is provided with an inlet 9 for return heating water from a heating system connected to the boiler.
  • the inlet 9 is connected via a pipe 10 to a preheater 11, arranged in the upper part of the combustion chamber, with an outlet 12 which, via a pipe 13, conducts preheated return heating water down to the bottom of the boiler.
  • Reference number 25 designates a vent duct.
  • the preheater consists of a double-shelled vessel with an inlet 14, which is connected to the pipe 10 and opens into an inner chamber 15 in the vessel, and vent openings 26.
  • This chamber communicates, in its lower part, with a gap-shaped space 16 which surrounds the chamber and through which the return heating water passes up to the outlet 12.
  • the space 16 is very narrow, and the heating water which passes up through the gap is subjected to effective heating by the flue gases in the combustion chamber 4, which sweep over the outer vessel wall. It is preferred that the space has a width of the order of 1-4 mm, preferably roughly 2 mm.
  • the outer wall of the preheater 11 is provided with a large number of pins 17 which are welded on essentially radially and will be heated by the flue gases and conduct heat to the vessel wall.
  • the pins 17 have a length which is slightly, preferably roughly 2 mm, shorter than the width of the flow duct for the combustion gases, which is formed between the preheater and the inner shell 5 of the combustion chamber.
  • the inner shell 5 of the combustion chamber is surrounded by a tube coil 18, suitably made from a finned tube made of copper. Cold water is supplied to the tube coil at the inlet 19, see Fig. 1, and is heated during passage through the tube coil to an outlet 20, see Fig. 2, for hot water.
  • the tube coil 18 is surrounded by a guide plate 21 which, together with the inner shell 5 of the combustion chamber, forms a gap-shaped passage 22 for the heating water which passes up to a riser vessel 23 which is connected to the outlet 24 of the boiler, via which heating water is intended to be supplied to a heating system connected to the boiler.
  • the guide plate is provided with vent openings 28 in its upper part.
  • the width of the gap-shaped passage 22 is slightly, preferably roughly 4 mm, greater than the outer diameter of the tube in the tube coil 18.
  • a heating boiler intended for use in the home with a power of the order of 15-20 kW can be made with a diameter of 550 mm and a height of 1100 mm.
  • the production of hot tap water has been measured at 21 liters/minute at a temperature of 42°C. This is to be compared with the best boilers of this type currently available on the market, which produce 11 liters/minute and may then require a supplementary hot water container.
  • the pins 17 projecting from the preheater 11 will remain essentially soot-free on account of the high temperature, roughly 300-400°C.
  • heat transfer to the surrounding tube coil 18 is impaired.
  • the "heat losses" in the flue gases are then reduced, as a result of which more heat energy from these will be transferred to the water in the preheater 11. This means that relatively constant efficiency is obtained between soot removal operations.
  • Soot removal can also take place at longer intervals than in known boilers.

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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)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Details Of Fluid Heaters (AREA)
  • Air Supply (AREA)

Claims (10)

  1. Heißwasserbereiter mit einem Durchlauferhitzer für Leitungswasser, umfassend eine Brennkammer (4), einen Auslass (24) für Heizwasser von einem lückenförmigen Durchgang (22), der um die Brennkammer (4) angeordnet ist, eine Rohrschlange (18) für Leitungswasser, die in dem Durchgang angeordnet ist, und einen Einlass (9) für zurückkehrendes Heizwasser, dadurch gekennzeichnet, dass er einen Vorerhitzer (11) für zurückkehrendes Heizwasser umfasst, welcher in der Brennkammer (4) angeordnet ist, dadurch, dass der Vorerhitzer eine Auslassleitung (13) besitzt, welche vorerhitztes Heizwasser aus der Brennkammer (4) heraus und zu dem unteren Bereich des Heißwasserbereiters leitet, von wo die Anordnung so ist, dass das vorerhitzte Heizwasser aufwärts in den lückenförmigen Durchgang (22) durchgeht, welcher die Brennkammer (4) umfasst, während es durch die Brennkammer (4) erhitzt wird und Hitze an das Leitungswasser abgibt.
  2. Heißwasserbereiter nach Anspruch 1, dadurch gekennzeichnet, dass der Vorerhitzer (11) in Form eines zwei-wandigen Behälters hergestellt ist, dadurch, dass der Einlass (14) des Behälters mit einer inneren Kammer (15) in dem Behälter verbunden ist, dadurch, dass die Kammer (15) mit einem lückenförmigen Raum (16) verbunden ist, welcher sie umgibt, und dadurch, dass der Auslass (12) des Behälters mit diesem lückenförmigen Raum verbunden ist.
  3. Heißwasserbereiter nach Anspruch 2, dadurch gekennzeichnet, dass die Breite des lückenförmigen Raums (16) in dem Behälter sehr klein im Verhältnis zu dem Durchmesser des Behälters ist und eine Breite in der Ordnung von 1 bis 4 mm besitzt, vorzugsweise grob 2 mm.
  4. Heißwasserbereiter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Vorerhitzer (11) die Form eines zylindrischen Behälters besitzt und dadurch, dass die Außenseite des Behälters mit einer großen Anzahl von im Wesentlichen radial ausgerichteten Stiften (17) versehen ist.
  5. Heißwasserbereiter nach Anspruch 4, dadurch gekennzeichnet, dass die Länge der Stifte (17) leicht kürzer als die Breite eines Flusskanals für Rauchgase ist, welcher zwischen dem Vorerhitzer (11) und der inneren Wand (5) der Brennkammer gebildet ist.
  6. Heißwasserbereiter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der lückenförmige Durchgang (22), der um die Brennkammer (4) gebildet ist, durch eine innere Wand (5) der Brennkammer begrenzt wird und ein Führungsblech (21), welches diese Wand umfasst, und dadurch, dass die Breite des lückenförmigen Durchgangs (22) leicht größer ist als der Durchmesser des Rohrs in der Rohrschlange (18) für das Leitungswasser.
  7. Heißwasserbereiter nach Anspruch 6, dadurch gekennzeichnet, dass die Rohrschlange (18) für das Leitungswasser aus einem gerippten Rohr hergestellt wird und dadurch, dass die Breite des lückenförmigen Durchgangs (22), der dazu bestimmt ist, die Rohrschlange aufzunehmen, leicht größer als der äußere Durchmesser der Rippen des Rohrs ist.
  8. Heißwasserbereiter nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Vorerhitzer (11) in dem oberen Bereich der Brennkammer (4) angeordnet ist.
  9. Heißwasserbereiter nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass er einen Brenner (3) für Öl und/oder Gas umfasst, der in dem unteren Bereich der Brennkammer (4) angeordnet ist.
  10. Heißwasserbereiter nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass ein elektrischer Erhitzer (8) nahe dem Boden des Heißwasserbereiters angeordnet ist.
EP01941362A 2000-06-21 2001-06-08 Wasserheizer mit vorheizer im brennraum Expired - Lifetime EP1292797B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0002324 2000-06-21
SE0002324A SE515311C2 (sv) 2000-06-21 2000-06-21 Varmvattenpanna
PCT/SE2001/001306 WO2001098716A1 (en) 2000-06-21 2001-06-08 Hot-water boiler including a preheater arranged in the combustion chamber

Publications (2)

Publication Number Publication Date
EP1292797A1 EP1292797A1 (de) 2003-03-19
EP1292797B1 true EP1292797B1 (de) 2004-10-06

Family

ID=20280183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01941362A Expired - Lifetime EP1292797B1 (de) 2000-06-21 2001-06-08 Wasserheizer mit vorheizer im brennraum

Country Status (6)

Country Link
EP (1) EP1292797B1 (de)
AT (1) ATE278918T1 (de)
AU (1) AU2001274721A1 (de)
DE (1) DE60106247T2 (de)
SE (1) SE515311C2 (de)
WO (1) WO2001098716A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL223959B1 (pl) * 2012-03-23 2016-11-30 Aic Spółka Akcyjna Dwufunkcyjny wymiennik ciepła
PL242434B1 (pl) 2020-07-20 2023-02-20 Aic Spolka Akcyjna Dwufunkcyjny kocioł grzewczy

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR830052A (fr) * 1936-12-14 1938-07-20 Chaudière pour chauffage central
DE3315219C2 (de) * 1983-04-27 1986-08-07 Robionek, Hans-Joachim, 4660 Gelsenkirchen-Buer Mit Fernwärme als Heizmedium betreibbarer Brauchwasserspeichererhitzer
US4993402A (en) * 1989-12-18 1991-02-19 Carrier Corporation Fuel efficient rapid response water heating module

Also Published As

Publication number Publication date
SE0002324D0 (sv) 2000-06-21
AU2001274721A1 (en) 2002-01-02
DE60106247D1 (de) 2004-11-11
DE60106247T2 (de) 2006-02-23
SE0002324L (sv) 2001-07-09
SE515311C2 (sv) 2001-07-09
ATE278918T1 (de) 2004-10-15
EP1292797A1 (de) 2003-03-19
WO2001098716A1 (en) 2001-12-27

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