(19)
(11) EP 2 489 936 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.11.2017 Bulletin 2017/48

(43) Date of publication A2:
22.08.2012 Bulletin 2012/34

(21) Application number: 12155697.1

(22) Date of filing: 16.02.2012
(51) International Patent Classification (IPC): 
F23N 1/04(2006.01)
F23J 13/02(2006.01)
F23L 17/00(2006.01)
F23N 1/06(2006.01)
 F23N 3/08(2006.01)
F23N 5/00(2006.01)
F23L 17/04(2006.01)
F23N 5/18(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 21.02.2011 NL 2006270

(71) Applicant: DRU Verwarming B.V.
6921 RW Duiven (NL)

(72) Inventor:
  • Van Laar, Christiaan
    7322 JD Apeldoorn (NL)

(74) Representative: Algemeen Octrooi- en Merkenbureau B.V. 
P.O. Box 645
5600 AP Eindhoven
5600 AP Eindhoven (NL)

   


(54) Closed hearth system with forced air flow


(57) The present invention, relates to a closed hearth system. The system comprises a hearth (1) having an at least substantially closed combustion chamber (2), into which a fuel supply channel (18) for fluid fuel opens, in a wall of which combustion chamber an inlet opening is provided, which inlet opening is connected to a combustion air supply channel (4), and an outlet opening, which outlet opening is connected to a flue gas channel (5). The system further comprises an air circulation device (12) to be driven by a driving unit, which effects a forced air circulation, which air circulation device is connected to the flue gas channel and which, in use, generates an underpressure in the flue gas channel relative to the pressure in the combustion chamber. The invention further relates to a flue gas channel for use with a closed hearth system and to a method for adapting a closed hearth system.







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