Oil cooler with cooling water side fin and oil side fin

(19)

(11)

EP 0 919 780 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	25.08.1999 Bulletin 1999/34

(43)	Date of publication A2:
	02.06.1999 Bulletin 1999/22

(21)	Application number: 98121563.5

(22)	Date of filing: 18.11.1998

(51)	International Patent Classification (IPC)⁶: F28D 9/00, F28F 3/02, F28F 1/12

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

28.11.1997 JP 328993/97
02.12.1997 JP 331971/97

(71)	Applicant: Denso Corporation
	Kariya-city, Aichi-pref., 448-8661 (JP)

(72)	Inventors:
	Yamanaka, Yasutoshi Kariya-shi, Aichi 448-8661 (JP) Komoda, Shuji Kariya-shi, Aichi 448-8661 (JP) Hamada, Shinichi Kariya-shi, Aichi 448-8661 (JP)

(74)	Representative: Klingseisen, Franz, Dipl.-Ing. et al
	Patentanwälte, Dr. F. Zumstein, Dipl.-Ing. F. Klingseisen, Postfach 10 15 61 80089 München 80089 München (DE)

(54)	Oil cooler with cooling water side fin and oil side fin

(57) An oil cooler has a tube (103d) disposed in a cooling water passage (103c) and defining an oil passage therein, an oil side inner (102c) fin brazed to an inside wall of the tube (103d) in the oil passage, and a water side inner fin (102d) brazed to an outside wall of the tube (103d) in the cooling water passage. The thickness Tw of the water side inner fin (102d) is thicker than the thickness To of the oil side inner fin (102c). The water side and oil side inner fins (102c, 102d) are corrugated fins.

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