EP0000973A1 - Appareil pour le chauffage d'un liquide - Google Patents

Appareil pour le chauffage d'un liquide Download PDF

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Publication number
EP0000973A1
EP0000973A1 EP78200156A EP78200156A EP0000973A1 EP 0000973 A1 EP0000973 A1 EP 0000973A1 EP 78200156 A EP78200156 A EP 78200156A EP 78200156 A EP78200156 A EP 78200156A EP 0000973 A1 EP0000973 A1 EP 0000973A1
Authority
EP
European Patent Office
Prior art keywords
conducting
channel portion
channel
flue gas
liquid
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.)
Withdrawn
Application number
EP78200156A
Other languages
German (de)
English (en)
Inventor
Gerrit Jan Heino
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.)
RHEEM BV
Rheem Nederland BV
Original Assignee
RHEEM BV
Rheem Nederland BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by RHEEM BV, Rheem Nederland BV filed Critical RHEEM BV
Publication of EP0000973A1 publication Critical patent/EP0000973A1/fr
Withdrawn legal-status Critical Current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
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/205—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with furnace 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
    • F24H1/0027—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using fluid fuel
    • 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
    • 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
    • F24H1/34—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water chamber arranged adjacent to the combustion chamber or chambers, e.g. above or at side

Definitions

  • the invention relates to a device for heating a liquid, for example a central-heating vessel, a boiler and so on comprising an atmospherically ignited burner operating for a limited period of time, a flue gas outlet channel and a wall to be heated by the flue gases for transmitting heat to the liquid to be heated.
  • Atmospherically ignited burners require that the heating device should be provided with passages for the flue gases in order to obtain the desired resistance in the system. This resistance also produces a draught through the heating device when the heat souce is not operating. Such a draught per se is advantageous for evaporating and conducting away any moisture precipitated from the flue gases.
  • the invention has for its object to provide a heating device, in which heat cannot get lost due to draught through the heating device and, on the contrary, the heat is maintained unhindered with a ' . natural draught so that the risk of condensed precipitates is avoided.
  • the device according to the invention is distinguished in that the flue gas outlet channel comprises a channel portion conducting the flue gases upwards and a channel portion communicating with the former and conducting said gases downwards, the heatable wall being arranged both in the upwardly conducting channel and in the downwardly conducting channel.
  • the invention is based on the phenomenon of a thermostatic equilibrium in the flue gas outlet channel, since when the burner is switched off the hot liquid will heat the flue gases in the two channel portions across the wall so that these flue gases tend to flow upwards.
  • the closed communication of the two portions of the flue gas channel ensures a thermostatic equilibrium so that at a given heat of the gases in the flue gas channel the water will not give off heat any longer.
  • the flue gas outlet channel does not comprise means impeding the passages of gas, a natural draught can be maintained.
  • the device is constructed in the form of a continuous flow heater, as is the case with a conventional central-heating vessel, in which the water to be heated is continuously pushed through a heat exchanger into the flue gas channel, it may be advantageous in accordance with the invention to arrange the heat exchanger section of the downwardly conducting channel portion at a lower level than the heat exchanger section of the upwardly conducting channel portion. In this way the desired thermostatic equilibrium in the channel portions can be better maintained.
  • An intermittently operating burner is frequently provided with a pilot flame, which gives off such heat that together with one heat exchanger section it maintains the heat of a quantity of flue gas which has to be equal to the quantity of flue gas to be held in the hot state by the other heat exchanger section.
  • the aforesaid partition may be formed by the refractory stones of the combustion space around the burner.
  • a first embodiment of the heating device in accordance with the invention is used as a heating vessel of a central heating system.
  • the vessel mainly comprises an envelope 1, which is suitably insulated from the surroundings in known manner.
  • the vessel is provided with a burner 2, which may be fed by any suitable fuel, for example, gas or oil.
  • the fuel feeding duct is designated by reference numeral 3. Since the boiler concerned here is equipped with an intermittently operating burner a pilot flame 4 is constantly maintained an will ignite the main burner 2 each time when the fuel supply is released through a feed cock controlled by a thermostat (not shown).
  • a flue gas outlet channel 5 which is constituted in accordance with the invention by two portions to wit an upwardly conducting section 51 and a section 52 communicating with former and conducting the flue gases downwards.
  • the lower end of the latter section 52 joins a channel 6 leading to the chimney, which channel may be provided in a manner not shown with conventional draught- interrupting means, heat exchangers for preheating the water and the like.
  • the flue gases are conducted away in the direction indicated by the solid arrows in figures 1 and 2.
  • Both the upwardly conducting portion and the downwardly conducting portion 51 and 52 respectively of the flue gas channel 5 include a section 71 and 72 respectively of a heat exchanger 7.
  • the heat exchanger 7 communicates with the normal circulations of the water to be heated, said circulation including the conventional radiators and the like.
  • the heat exchanger 7 may be of any desired form, which does not constitute a subject- matter of the invention.
  • Fig.2 shows that the levels of the sections 71 and 72 are different so that the section 72 in the downwardly conducting channel 52 is at a lower level than the other section 71.
  • FIG.2 shows that the fire hearth is surrounded by refractory stones 9, the stones adjacent the channel portion 52 being capable of giving off heat to the gases in said channel.
  • Fig.3 and 4 show a second embodiment of a heating devise in accordance with the invention.
  • abhot water system for example, a boiler mainly comprising an insulated envelope 11, a water vessel 12 arranged therein and a central flue gas channel 13 arranged centrally in the water vessel 12.
  • Beneath the water vessel 12 is provided a burner 14 having a pilot flame 15, which are operative in the manner described with reference to the preceding embodiment.
  • the heat transfer from the flue gases to the water takes place through the inner wall 16 of the water vessel 12.
  • the flue gas channel 13 comprises an upwardly conducting channel portion 131 and a downwardly conducting channel portion communicating with the former, the lower end of the channel portion 132 communicating with the chimney joint 17.
  • sectional area of the flue gas channel 13 may have any shape, it is shown in fig.4 that the channels 131 and 132 are formed by arranging a fitting, diametrical partition 18 in the circular flue gas channel 13.
  • the flue gases are conducted away in the direction of the solid arrows in fig.3 and when the burner is switched off, hot gas will accumulate in the upper part of the two channel portions 131 and 132, whilst a thermostatic equilibrium is established which is indicated by the arrow drawn in broken lines.
  • This embodiment operates in the manner described with reference to the preceding embodiment.
  • the invention is not limited to the embodiments shown nor to the shape of the flue gas channel.

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)
  • Air Supply (AREA)
  • Incineration Of Waste (AREA)
EP78200156A 1977-08-26 1978-08-25 Appareil pour le chauffage d'un liquide Withdrawn EP0000973A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7709476 1977-08-26
NL7709476A NL7709476A (nl) 1977-08-26 1977-08-26 Inrichting voor het verwarmen van een vloeistof.

Publications (1)

Publication Number Publication Date
EP0000973A1 true EP0000973A1 (fr) 1979-03-07

Family

ID=19829087

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78200156A Withdrawn EP0000973A1 (fr) 1977-08-26 1978-08-25 Appareil pour le chauffage d'un liquide

Country Status (3)

Country Link
EP (1) EP0000973A1 (fr)
GB (1) GB1587589A (fr)
NL (1) NL7709476A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0069471B1 (fr) * 1981-06-19 1986-03-12 Condensing Boilers Limited Chaudiére
AU609438B2 (en) * 1986-12-12 1991-05-02 Rheem Australia Pty Limited Flue construction

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH86525A (fr) * 1919-06-26 1920-09-01 Moreau Henri Chaudière de chauffage central.
GB176760A (en) * 1921-03-09 1922-11-30 Fr De Chaleur Et Lumiere Soc Improvements in gas heated sectional heaters for heating water or generating steam
FR687972A (fr) * 1930-01-10 1930-08-18 Chauffage Et De Recuperation T Chaudière chauffée au gaz
FR715403A (fr) * 1930-08-19 1931-12-03 Constructeurs Associes De Pari Dispositif chauffe-eau par accumulation de chaleur avec chauffage au gaz
FR753108A (fr) * 1933-03-24 1933-10-07 Chaudière destinée au chauffage central des locaux
FR1126514A (fr) * 1955-05-13 1956-11-26 Ch Thuelchassaigne & Cie Sa De Chauffe-eau à accumulation à gaz perfectionné

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH86525A (fr) * 1919-06-26 1920-09-01 Moreau Henri Chaudière de chauffage central.
GB176760A (en) * 1921-03-09 1922-11-30 Fr De Chaleur Et Lumiere Soc Improvements in gas heated sectional heaters for heating water or generating steam
FR687972A (fr) * 1930-01-10 1930-08-18 Chauffage Et De Recuperation T Chaudière chauffée au gaz
FR715403A (fr) * 1930-08-19 1931-12-03 Constructeurs Associes De Pari Dispositif chauffe-eau par accumulation de chaleur avec chauffage au gaz
FR753108A (fr) * 1933-03-24 1933-10-07 Chaudière destinée au chauffage central des locaux
FR1126514A (fr) * 1955-05-13 1956-11-26 Ch Thuelchassaigne & Cie Sa De Chauffe-eau à accumulation à gaz perfectionné

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0069471B1 (fr) * 1981-06-19 1986-03-12 Condensing Boilers Limited Chaudiére
AU609438B2 (en) * 1986-12-12 1991-05-02 Rheem Australia Pty Limited Flue construction

Also Published As

Publication number Publication date
GB1587589A (en) 1981-04-08
NL7709476A (nl) 1979-02-28

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Effective date: 19820804

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Inventor name: THE INVENTOR HAS AGREED TO WAIVE HIS ENTITLEMENT T