EP0923698B1 - A stove with solid fuel, working as a boiler for a heating system - Google Patents

A stove with solid fuel, working as a boiler for a heating system Download PDF

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Publication number
EP0923698B1
EP0923698B1 EP98923055A EP98923055A EP0923698B1 EP 0923698 B1 EP0923698 B1 EP 0923698B1 EP 98923055 A EP98923055 A EP 98923055A EP 98923055 A EP98923055 A EP 98923055A EP 0923698 B1 EP0923698 B1 EP 0923698B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
stove
shell
boiler
sheaf
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
EP98923055A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0923698A1 (en
Inventor
Paolo Crocetti
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0923698A1 publication Critical patent/EP0923698A1/en
Application granted granted Critical
Publication of EP0923698B1 publication Critical patent/EP0923698B1/en
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
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00—Stoves or ranges
    • F24B1/18—Stoves with open fires, e.g. fireplaces
    • F24B1/183—Stoves with open fires, e.g. fireplaces with additional provisions for heating water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B9/00—Stoves, ranges or flue-gas ducts, with additional provisions for heating water 

Definitions

  • the present invention concerns a stove with solid fuel, working as a boiler for a heating system.
  • the stove is an apparatus for the conversion of energy into thermic and usually is different from other devices for heating, like boilers, war air generators and similar, because it is conceived for releasing heat through its shell.
  • the stove is different from the fireside, where the furnace or mouth and the flue and the cowl are usually obtained in the thickness of the wall of the room to be heated.
  • Each boiler of this kind consists of an assembly of one or more metal walls, provided with a hollow space for the water circulation and with a plurality of copper coils with a spiral performance which are in communication with the wall(s) and are suspended on a water circulation grating and on a metal bottom, also provided with a hollow space.
  • Such boiler is placed in a wall or angle fireplace.
  • a tubular boiler is provided for the production of warm water for sanitary use and similar, which also is touched by the flames produced by the solid fuel burning on the grating, inside the fireplace.
  • the boiler has no other closing means.
  • Document EP-A-0 072 530 discloses a stove working as a boiler for a heating system comprising a housing inside which a heat exchanger is provided above the combustion chamber for the exploitation of the heat of the smokes.
  • the stove according to the present invention aims to solving above mentioned inconveniences, realizing an apparatus for the local heating that combines the pleasure of a furnace, even where no corresponding fireplace has not been provided, to the advantages of a central heating.
  • the present invention makes possible, on one side, the use of the heat with controlled combustion for the local heating as well as for the central heating with high thermic power, and on the other side an easy maintenance and cleaning of the heating device.
  • the stove with solid fuel working as a boiler for a heating system according to the present invention consists of a stove according to claim 1.
  • Figure 1 shows a front view of a stove with solid fuel functioning as a boiler for a heating system, according to one embodiment of the present invention.
  • Figure 2 shows an axonometric exploded view of the stove of figure 1, comprising a first heat exchanger provided inside the same.
  • Figure 3 shows an axonometric view of a sheaf of pipes of a second heat exchanger of the stove according to the embodiment of the present invention.
  • Figure 4 shows a longitudinal section of the sheaf of pipes of figure 3.
  • figure 1 shows the stove working as a boiler for a heating system according to the present invention, without all those details and accessories concerning the heating system as they are conventional.
  • 1 shows the shell of a stove with solid fuel, usually firewood; in the embodiment described, said shell has the shape of a parallelepiped, comprises a single room and comprises a furnace 2 at the bottom.
  • the stove preferably out of metal, is of the so-called all-over structure, which means that in use, the furnace is filled with fuel and the combustion takes place progressively in the whole mass.
  • Said shell 1 shown in front has in correspodence with said furnace 2 a wing 3 for introducing firewood, coal or any other solid fuel.
  • Said wing 3, which has a transparent panel 30, preferably out of thermic glass, is mounted in a frame 10 showing slits 12 for the air inlet from the room into the furnace 2 according to the arrows in figure 2.
  • Said shell 1 ends up at the top in a tapered connection 11, preferably in the shape of a truncated pyramid, to a flue (not shown) with means 13 for the adjusting of the draught provided thereinbetween.
  • a first heat exchanger 5 is provided in a portion 4 of the internal space of the shell 1, between the furnace 2 and the portion limited by said connection 11.
  • the heat exchanger 5 consists of a sheaf of pipes with horizontal development (figure 2) which, in said portion 4 of said shell 1 into which it is housed, is touched by the flames and by the fumes produced in said furnace 2. Said portion 4 is closed in front with a panel 6 that can be removed from said shell 1.
  • the heat exchanger 5 has headers 5e and 5u, respectively for the inlet and the outlet of the circulating water, which are being connected with connections 7e and 7u of a central heating, which is not shown.
  • the headers 5e and 5u also work as supporting means for the whole sheaf of tubes on corresponding sliding and resting guides 8, which are linked inside said shell 1 along its circumference.
  • the heat exchanger 5 has a stiffening frame 5i, the lower sides whereof are resting onto corresponding supporting rods 9.
  • the first heat exchanger 5 is linked to a second sheaf of pipes 50 with horizontal development (figures 3 and 4), placed inside a parallelepiped box 51 (figure 2) at the bottom of said shell 1 of the stove and in contact with the same.
  • the assembly of the second sheaf of pipes 50 and of the box 51 forms a second heat exchanger 55 for the warm water production for sanitary use.
  • the second exchanger 55 receives warmth also due to the air convection and due to the conduction from the shell 1 of the stove.
  • the measure taken by two thermocouples connected to digital thermometer, respectivel upstream and downstream of a sheaf of pipes of 22 cm length of the heat exchanger 5, showed a temperature gradient of about 700°C and supplies an evaluation - even if only qualitatively - of the heat exchange that takes place in said exchanger and therefore of the power of the stove-boiler according to the present invention.
  • the quantity of heat transmitted to the heating system is so high that the temperature in the expansion container causes the boiling of the water contained therein, thus suggesting to limit the combustion mass.
  • the yield of the stove-boiler according to the present invention is so high because the flames themself touch the sheaf of pipes of the exchanger 5 in any pipe.
  • the main advantage of the stove according to the present invention consists in the better yield of the second heat exchanger 55 which allows a greater carriage of warm water as it has a greater surface for the thermic exchange.
  • the inlet of combustion air into the stove according to the embodiment of the present invention may sometimes not be able to feed all firewood: as it must pass close to the inside of the metal bottom onto which said firewood is placed, it may oxygenate only the passages obtained in the arrangement of the pieces.
  • a possible variant according to the present invention provides the use of three supports placed below the structure of the stove, for the realization inside the same of two solid drawers resistant to high temperatures, with the purpose of favouring the collection of the ash and at the same time for adjusting the combustion so that the whole of the firewood rests onto two strong cast iron gratings embedded in correspondence with the small drawers below, thus obtaining the automatic collection of the ash and the exact adjusting of the combustion speed, operating on the opening or on the closing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Fuel Combustion (AREA)
  • Central Heating Systems (AREA)
  • Baking, Grill, Roasting (AREA)
  • Cookers (AREA)
EP98923055A 1997-05-27 1998-05-22 A stove with solid fuel, working as a boiler for a heating system Expired - Lifetime EP0923698B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT97RM000315A IT1293030B1 (it) 1997-05-27 1997-05-27 Stufa a combustibile solido funzionante da caldaia per impianto a termosifone
ITRM970315 1997-05-27
PCT/IT1998/000129 WO1998054515A1 (en) 1997-05-27 1998-05-22 A stove with solid fuel, working as a boiler for a heating system

Publications (2)

Publication Number Publication Date
EP0923698A1 EP0923698A1 (en) 1999-06-23
EP0923698B1 true EP0923698B1 (en) 2001-12-12

Family

ID=11405098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98923055A Expired - Lifetime EP0923698B1 (en) 1997-05-27 1998-05-22 A stove with solid fuel, working as a boiler for a heating system

Country Status (5)

Country Link
EP (1) EP0923698B1 (enrdf_load_stackoverflow)
DE (1) DE69802895T2 (enrdf_load_stackoverflow)
ES (1) ES2169914T3 (enrdf_load_stackoverflow)
IT (1) IT1293030B1 (enrdf_load_stackoverflow)
WO (1) WO1998054515A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102644938B (zh) * 2012-05-14 2014-08-13 王德宝 一种生物质节能取暖装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE40956B1 (en) * 1975-01-27 1979-09-26 Morris W Improvements in space heaters
IT1060348B (it) 1976-03-12 1982-07-10 Gabellini G Dispositivo per la produzione rapida e continua di acqua calda con elevato rendimento..atto ad essere inserito negli impianti di riscaldamento a termosifoni
US4204518A (en) * 1977-01-26 1980-05-27 James Howard Smith Wood burning heating unit
IT1067126B (it) 1978-12-18 1985-03-12 Gabellini Giuseppe Caldaia per caminetti,atta ad integrare o a sostituire le caldaie del tipo convenzionale utilizzate negli impianti di riscaldamento in genere
DE8123947U1 (de) * 1981-08-17 1982-01-07 Weso-Aurorahütte GmbH, 3554 Gladenbach Heizeinsatz fuer kacheloefen

Also Published As

Publication number Publication date
EP0923698A1 (en) 1999-06-23
IT1293030B1 (it) 1999-02-11
DE69802895T2 (de) 2002-08-22
ES2169914T3 (es) 2002-07-16
WO1998054515A1 (en) 1998-12-03
DE69802895D1 (de) 2002-01-24
ITRM970315A1 (it) 1998-11-27
ITRM970315A0 (enrdf_load_stackoverflow) 1997-05-27

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