Global Patent Index - EP 0598691 A1

EP 0598691 A1 19940525 - A heating boiler with flue-gas recirculation and a combustion chamber unit for such boilers.

Title (en)

A heating boiler with flue-gas recirculation and a combustion chamber unit for such boilers.

Title (de)

Heizkessel mit Rauchgasrezirkulation und Brennkammereinheit für solche Kessel.

Title (fr)

Chaudière de chauffage avec récirculation de gaz de fumée et chambre de combustion pour telles chaudières.

Publication

EP 0598691 A1 19940525 (EN)

Application

EP 93850219 A 19931117

Priority

SE 9203460 A 19921118

Abstract (en)

A heating boiler (10) which operates with flue-gas recirculation, said boiler comprising a water magazine (11) which is defined by an outer shell (12) and an inner shell (13) of circular cross-section, and two outer walls (25, 27) and a cylindrical combustion chamber (20) mounted inwardly of the water magazine (11) and comprising a plurality of surrounding flue-gas channels (17) which are mutually divided by longitudinally extending flanges (15) or the like disposed around the periphery of the circular inner shell (13) of the water magazine. The combustion chamber (20) is defined by a cylindrical pipe (16), a first combustion-chamber wall (18) which is connected to one end of said pipe and which is provided with a burner-accommodating opening, and a second combustion-chamber wall (19) connected to the other end of the pipe (16). The cylindrical pipe (16) is provided with a saddle-shaped outlet (22) which is located in the vicinity of said second wall (19) and which extends at most around half the circumference of the pipe (16). The outlet (22) has communication with a first group of flue-gas channels (17a) which include those flue gas channels that are located in the near vicinity of said half circumference and which, in turn, are connected solely to a flue-gas turning chamber (14) on the burner side delimited by the outer wall (25) and the first combustion-chamber wall (18). The flue-gas turning chamber (14) is connected with the combustion chamber (20) by means of a gap (23) located in the vicinity of the burner-accommodating opening, and is also connected to a second group of flue-gas channels (17b) including the remainder of the flue gas channels, which are connected to a flue-gas pipe (28) which extends through the other outer wall (27), the pipe (28) communicating with the surroundings. <IMAGE>

IPC 1-7

F23C 9/00; F24H 1/26; F24H 9/00; F23M 9/06

IPC 8 full level

F23C 3/00 (2006.01); F23C 9/08 (2006.01); F24H 1/26 (2006.01)

CPC (source: EP)

F23C 3/00 (2013.01); F23C 9/08 (2013.01); F24H 1/263 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE FR IT LI

DOCDB simple family (publication)

EP 0598691 A1 19940525; EP 0598691 B1 19970716; AT E155568 T1 19970815; DE 69312226 D1 19970821; DE 69312226 T2 19971113; SE 500326 C2 19940606; SE 9203460 D0 19921118; SE 9203460 L 19940519

DOCDB simple family (application)

EP 93850219 A 19931117; AT 93850219 T 19931117; DE 69312226 T 19931117; SE 9203460 A 19921118