(19)
(11) EP 0 632 246 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
12.04.1995 Bulletin 1995/15

(43) Date of publication A2:
04.01.1995 Bulletin 1995/01

(21) Application number: 94304576.5

(22) Date of filing: 23.06.1994
(51) International Patent Classification (IPC)6: F28D 1/053, F28F 19/00, F28F 13/08, F28F 19/01
(84) Designated Contracting States:
DE FR GB IT SE

(30) Priority: 02.07.1993 JP 36481/93 U

(71) Applicant: SANDEN CORPORATION
Isesaki-shi Gunma, 372 (JP)

(72) Inventors:
  • Kado, Hirotaka
    Isesaki-shi, Gunma 372 (JP)
  • Aoki, Hisao
    Isesaki-shi, Gunma 372 (JP)

(74) Representative: Jackson, Peter Arthur 
GILL JENNINGS & EVERY Broadgate House 7 Eldon Street
London EC2M 7LH
London EC2M 7LH (GB)


(56) References cited: : 
   
       


    (54) Heat exchanger


    (57) A heat exchanger includes a pair of tanks (14,15) and a heat exchanger core comprising a plurality of upstream and downstream heat-transfer tubes (11,31,41) and fin units (12). The downstream tubes have a cross sectional area which is greater than that of the upstream tubes for preventing the downstream heat-transfer tubes from becoming clogged by corrosion products which are grown in the upstream tubes. Further, a filter device (24) may be disposed in the tank for filtering out corrosion products before they enter the downstream tubes.






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