초록 ▼

A motor vehicle combined heat exchanger has a tube bank linked to two manifolds and divided into an oil cooler having tubes for oil, and a condenser having tubes for a cooling fluid. The two types of tubes are different and possess respective hydraulic diameters related by the following inequality:

A motor vehicle combined heat exchanger has a tube bank linked to two manifolds and divided into an oil cooler having tubes for oil, and a condenser having tubes for a cooling fluid. The two types of tubes are different and possess respective hydraulic diameters related by the following inequality: 0.8 mm2.ltoreq.DHa.times.DHb.ltoreq.3.00 mm2 where the hydraulic diameter (DH) of a tube is defined by the formula DH=4S/P, in which S designates the area of the internal cross-section of the tube (expressed in mm2) and P the internal perimeter, or "wet perimeter", of the tube (expressed in mm).

대표청구항 ▼

1. A combined heat exchanger including: two manifolds; and a bank of tubes linking the manifolds, the combined heat exchanger divided into an oil cooler part, the tubes of which are suitable for being traversed by oil, and into a condenser part, the tubes of which are suitable for being traversed b

1. A combined heat exchanger including: two manifolds; and a bank of tubes linking the manifolds, the combined heat exchanger divided into an oil cooler part, the tubes of which are suitable for being traversed by oil, and into a condenser part, the tubes of which are suitable for being traversed by a cooling fluid, wherein the tubes of the oil-cooler part and the tubes of the condenser part have different hydraulic diameters related by the following inequality: 0.8 mm2.ltoreq.DHa.times.DHb.ltoreq.3.00 mm2 where the hydraulic diameter DH of a tube is defined by the formula DH=4S/P, in which S designates the area of the cross-section of the tube (expressed in mm2) and P the internal perimeter of the tube (expressed in mm).