(19)
(11) EP 0 825 406 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.03.1999 Bulletin 1999/10

(43) Date of publication A2:
25.02.1998 Bulletin 1998/09

(21) Application number: 97306110.4

(22) Date of filing: 12.08.1997
(51) International Patent Classification (IPC)6: F28F 13/04, F28F 1/32, F28F 1/24
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV RO SI

(30) Priority: 13.08.1996 GB 9616956

(71) Applicant: Caradon Ideal Limited
Kingston Upon Hull HU5 4JN (GB)

(72) Inventors:
  • Bratley, Roy
    Hessle, Hull HU13 0HP (GB)
  • Lucas, Neville
    Hedon, Hull HU12,8HR (GB)

(74) Representative: Lerwill, John et al
A.A. Thornton & Co. Northumberland House 303-306 High Holborn
London, WC1V 7LE
London, WC1V 7LE (GB)

   


(54) Heat exchangers


(57) To reduce the migration of condensate formed on the fins (18) of a condensing gas boiler, the fins are inclined downwardly in a direction away from the combustion chamber (10) of an angle of between 2° and 20° to the horizontal. An excess inward migration of condensate can lead to a build up of corrosion products on the inner edges (32) of the fins which may fall into the combustion chamber and disrupt the operation of the boiler.
During manufacture, the heat exchange tubes 1 on which the fins are mounted are staggered relative to each other such that the alignment of the tubes inclines the fins at the desired angle.






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