EP1327825B1 - Improvements in a pellet stove - Google Patents

Improvements in a pellet stove Download PDF

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Publication number
EP1327825B1
EP1327825B1 EP03000019A EP03000019A EP1327825B1 EP 1327825 B1 EP1327825 B1 EP 1327825B1 EP 03000019 A EP03000019 A EP 03000019A EP 03000019 A EP03000019 A EP 03000019A EP 1327825 B1 EP1327825 B1 EP 1327825B1
Authority
EP
European Patent Office
Prior art keywords
air
circuit
heated
pellet stove
feeding
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
EP03000019A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1327825A1 (en
Inventor
Domenico Piazzetta
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.)
Gruppo Piazzetta SpA
Original Assignee
Gruppo Piazzetta SpA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11462102&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1327825(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Gruppo Piazzetta SpA filed Critical Gruppo Piazzetta SpA
Priority to SI200330316T priority Critical patent/SI1327825T1/sl
Publication of EP1327825A1 publication Critical patent/EP1327825A1/en
Application granted granted Critical
Publication of EP1327825B1 publication Critical patent/EP1327825B1/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
    • F24B1/02—Closed stoves
    • F24B1/024—Closed stoves for pulverulent fuels
    • 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
    • F24B7/00—Stoves, ranges or flue-gas ducts, with additional provisions for convection heating 
    • F24B7/02—Stoves, ranges or flue-gas ducts, with additional provisions for convection heating  with external air ducts
    • F24B7/025—Stoves, ranges or flue-gas ducts, with additional provisions for convection heating  with external air ducts with forced circulation

Definitions

  • the present invention relates to improvements in or relating to a pellet stove, particularly suitable for heating a number of dwelling spaces.
  • pellet stoves Numerous versions of pellet stoves have been proposed in the prior art, which are fed with relatively small standard sized capsules obtained by pressing saw dust.
  • air is heated and fed back into the space where the stove is located through one or more slots formed in the upper front portion of the stove.
  • the air properly heated within the stove flows through a grid located approximately 1 m high above the floor level.
  • the main object of the present invention is to provide a pellet stove suitable for heating to a comfortable level not only the room or space where it is located, but also other rooms or spaces in a building or apartment.
  • Another object of the present invention is to provide a stove that can be manufactured at a low production cost and is highly efficient with optimum yield endurance and long endurance of operation.
  • said heated-air output circuit comprises a plurality of ducts for supplying heated-air away to a space remote from that locating said pellet stove, which are arranged either at the same level, or at a lower or higher level with respect to one another.
  • a pellet stove according to the present invention is generally indicated at 1 and, as it will be noted, it comprises a support and containment structure including a frame 2 rising from a base 3 and delimiting a substantially parallelepiped-shaped body rectangular in top view, which is provided with a heat insulating lining 4 having a smooth outer face that can be variously finished, e.g. coloured or otherwise decorated.
  • a pellet combustion chamber 10 is delimited between the front wall 5 of the stove and three side walls: a rear metal wall 6, and two side walls 7 and 8 each provided on its inner face with a flameproof lining.
  • the combustion chamber 10 comprises hearth or brazier 11 and an exhaust circuit 12 for the hot flue gases which from the top of the combustion chamber 10 behind the metal wall 6 extend downwardly to a level lower than that of the combustion chamber 10 and then has a substantially horizontal tubular section 13 that communicates with a chimney 14.
  • the downwardly extending section of the exhaust circuit 12 Is delimited, on one side, by the rear metal wall 6 of the combustion chamber that, if desired, can be provided with vertically extending wings, and by a side and bottom wall 15 of the combustiort chamber, and, on the other, by a side wall 16, also made of metal, which extends from its upper end sealably connected to the front wall 5 closely underneath an air inlet grid 17, but above the combustion chamber 10, towards the inner portion of the stove, preferably by bending downwardly, and further extends with an intermediate vertical section 16a substantially parallel to the rear wall 6 of the combustion chamber and terminating with a substantially horizontal lower portion 16b spaced from the bottom 15 of the combustion chamber 10 and sealably fixed at its free end to the front wall 5.
  • the bottom portion 16b delimits a flue gas collection chamber 18 and has a wide port or through hole 19 through which the flue gases flow into the intake inlet of a fan 20 driven by an electric motor 20a and designed to force the combustion flue gases towards the lower tubular portion 13 of their path.
  • the metal wall 16 has longitudinal fins or wings 16c and 16d, i.e. in the flue gas and air flow, respectively, on its surface facing towards the exhaust circuit 12 and on its opposite surface to ensure optimum efficiency in the heat exchange between hot flue gases and ambient air coming in.
  • wall 21 is formed with an opening or through hole 23 located at the inlet of a fan 24 driven by an electric motor 25 and having its outlet connected to a two or multiple way output line 26, one of said ways feeding a line arranged at floor level and being designed to feed heated-air to an outlet 28 at floor level, whereas the other ways 29 feed respective lines 30 located at floor level to supply air to as many outlets 31 through which warm air is released into spaces or rooms other than the space or room in which the stove 1 is located (Figs. 1, 4 and 5).
  • the fact of providing output ducts 27 and 30 arranged at floor level makes it possible to provide a network for delivering the warm air provided by the stove 1 with minimum adverse effect on the room design and with interventions that require negligible modifications in the structure and interior decorations of the rooms.
  • the ducts 30 can extend around a corner at floor level and/or along a vertical corner of a room, through partitions or slabs by simply forming one or more through holes in them.
  • stove 1 is advantageously provided with an automatic or semi-automatic device for feeding the combustion chamber, which device comprises a loading hopper 40 e.g . provided between the rear wall and inner wall 21 of the stove, and is accessible through a top hatch or side door 42.
  • a screw feeder 43 driven by an electric motor 44 equipped with a reduction unit 45 is provided which is designed to feed pellets to a tubular chute 46 directly discharging onto the hearth or brazier 11.
  • the hearth or brazier 11 can be shaped as an upwardly open vase the bottom 11 a of which is formed with holes to allow comburant air supplied by a feeding duct 47 to be fed from undemeath thereof(Fig. 2).
  • Brazier 11 is provided with a sparking plug 48 to effect lighting automatically Above the sparking plug 48, at the front of the stove, an access door 49 to the combustion chamber 10 Is provided to allow cleaning, ash removal and maintenance to be carried out.
  • walls 6, 7 and 8 can have outer fins 6a, 7a and 8a, respectively, to increase heat exchange efficiency between hot flue gases and the air to be heated.
  • the remote feeding ducts can be provided with a respective check valve that can be either located in the stove 1, or at the remote end of its respective feeding duct.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid-Fuel Combustion (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Disintegrating Or Milling (AREA)
  • Fireproofing Substances (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
EP03000019A 2002-01-10 2003-01-03 Improvements in a pellet stove Expired - Lifetime EP1327825B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200330316T SI1327825T1 (sl) 2002-01-10 2003-01-03 Izboljsava pri peci na pelete

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVR20020001U 2002-01-10
IT2002VR000001U ITVR20020001U1 (it) 2002-01-10 2002-01-10 Stufa a pellet perfezionata

Publications (2)

Publication Number Publication Date
EP1327825A1 EP1327825A1 (en) 2003-07-16
EP1327825B1 true EP1327825B1 (en) 2006-04-05

Family

ID=11462102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03000019A Expired - Lifetime EP1327825B1 (en) 2002-01-10 2003-01-03 Improvements in a pellet stove

Country Status (10)

Country Link
EP (1) EP1327825B1 (pt)
AT (1) ATE322650T1 (pt)
CY (1) CY1105630T1 (pt)
DE (1) DE60304374T2 (pt)
DK (1) DK1327825T3 (pt)
ES (1) ES2261793T3 (pt)
HK (1) HK1058699A1 (pt)
IT (1) ITVR20020001U1 (pt)
PT (1) PT1327825E (pt)
SI (1) SI1327825T1 (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4067740A1 (en) 2021-03-31 2022-10-05 Gruppo Piazzetta S.p.A. Heat generator with efficient thermal exchange

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTV20050086A1 (it) * 2005-06-17 2006-12-18 Famar Itl Innovation Technolog Struttura di caldaia a pellets ad elevato recupero energetico.
ITVR20060194A1 (it) * 2006-12-15 2008-06-16 Cola S R L Stufa, particolarmente alimentabile a pellets, misto legna, graniglia, mais, combustibili vegetali, biomassa e simili
DE102007010919A1 (de) 2007-03-05 2008-10-30 Viessmann Werke Gmbh & Co Kg Brennstoffbehälter
FR2947327B1 (fr) 2009-06-24 2012-12-07 Supra Systeme d'alimentation pour appareil de chauffage a combustible solide fragmente
FR2960044B1 (fr) * 2010-05-11 2012-06-15 Solucrea Systeme de chauffage mixte a bois
ITVR20110150A1 (it) * 2011-07-14 2013-01-15 Nuova Cft S R L Stufa a pellet ad elevato rendimento
ITVI20120108A1 (it) * 2012-05-09 2013-11-10 Extraflame S P A Stufa a combustibile solido con convogliamento a distanza dell'aria riscaldata
DE202015101992U1 (de) 2015-04-22 2015-05-10 Johnson Electric Germany GmbH & Co. KG Pelletfördereinrichtung für Pelletöfen
ITUB20152314A1 (it) * 2015-07-20 2017-01-20 Ungaro Srl Stufa a pellet
ITUB20160756A1 (it) * 2016-02-15 2017-08-15 Thermorossi Spa Stufa o termo-stufa a pellet
FR3092648B1 (fr) * 2019-02-09 2021-02-12 Inovalp Poêle à échangeur thermique déporté
FR3092649B1 (fr) * 2019-02-09 2021-02-12 Inovalp Poêle à échangeur thermique variable déporté
FR3092647B1 (fr) * 2019-02-09 2021-02-12 Inovalp Poêle à échangeur thermique déporté
IT201900003487A1 (it) * 2019-03-11 2020-09-11 Gruppo Piazzetta Spa Gruppo generatore di calore con nuovo braciere
IT201900010197A1 (it) * 2019-06-26 2020-12-26 Gruppo Piazzetta Spa Apparecchiatura di riscaldamento
IT202100011807A1 (it) * 2021-05-07 2022-11-07 Ungaro Srl Stufa a pellet

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100913A (en) * 1974-10-29 1978-07-18 Armstrong Ernest Deloy Fireplace heating system
EP0119667A3 (fr) * 1983-03-22 1986-02-05 Bernard Jan Hallers Foyer ouvert
DE9218953U1 (de) * 1991-02-19 1996-05-23 Riener Karl Stefan Ofen für feste Brennstoffe, insbesondere Pellets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4067740A1 (en) 2021-03-31 2022-10-05 Gruppo Piazzetta S.p.A. Heat generator with efficient thermal exchange

Also Published As

Publication number Publication date
PT1327825E (pt) 2006-08-31
CY1105630T1 (el) 2010-12-22
DE60304374T2 (de) 2007-02-01
ATE322650T1 (de) 2006-04-15
ITVR20020001U1 (it) 2003-07-10
ES2261793T3 (es) 2006-11-16
SI1327825T1 (sl) 2006-10-31
DK1327825T3 (da) 2006-07-31
EP1327825A1 (en) 2003-07-16
DE60304374D1 (de) 2006-05-18
HK1058699A1 (en) 2004-05-28

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