(19)
(11) EP 0 694 747 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.12.1996 Bulletin 1996/52

(43) Date of publication A2:
31.01.1996 Bulletin 1996/05

(21) Application number: 95305169.5

(22) Date of filing: 24.07.1995
(51) International Patent Classification (IPC)6: F28D 1/03, F28F 3/04
(84) Designated Contracting States:
DE FR GB IT SE

(30) Priority: 25.07.1994 JP 172847/94

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

(72) Inventor:
  • Shinmura, Toshiharu, c/o Sanden Corporation
    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)

   


(54) Heat exchanger


(57) A heat exchanger, such as a condenser or an evaporator for an automotive air conditioning refrigerant circuit includes a plurality of tube elements each having a first planar portion and a second planar portion opposing the first planar portion. A plurality of projections are formed at an interior surface of the first and second planar portions. At least one hole is formed on a flat projecting end surface of the projection by piercing. The projections of the first and second planar portions are aligned with and face each other, and are fixedly connected to each other at their flat projecting end surfaces so that the at least one hole of the first and second projections face each other. This construction effectively increases the internal pressure resistance characteristics of the heat exchanger without causing an increase in a manufacturing cost thereof.






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