초록 ▼

A first cooling fin and a second cooing fin are separated to have a predetermine clearance, and a plurality of connecting portions for partly connecting the first and second cooling fins are formed. When the first and second cooling fins are unfolded, the length E of each the connecting portion in p

A first cooling fin and a second cooing fin are separated to have a predetermine clearance, and a plurality of connecting portions for partly connecting the first and second cooling fins are formed. When the first and second cooling fins are unfolded, the length E of each the connecting portion in parallel with the longitudinal direction of the first and second cooling fins is equal to 5% or less of the length F between the adjacent connecting portions. Further, the first cooling fin is projected from the condenser tube toward the radiator tube side with a projection length Lc being in a range of 1.7 to 7.0 mm.

대표청구항 ▼

[ What is claimed is:] [42.] An automotive heat exchanger for cooling an engine water for cooling an engine and a refrigerant of an air conditioning apparatus employing a refrigeration cycle, said automotive heat exchanger disposed at a front side of the vehicle and comprising:a plurality of first t

[ What is claimed is:] [42.] An automotive heat exchanger for cooling an engine water for cooling an engine and a refrigerant of an air conditioning apparatus employing a refrigeration cycle, said automotive heat exchanger disposed at a front side of the vehicle and comprising:a plurality of first tubes in which said refrigerant flows;a first core portion including a corrugated first cooling fin disposed between adjacent first tubes;a plurality of second tubes in which said engine water flows, said second tubes being disposed at a downstream air side of said first core portion in parallel with said first tubes so as to form a predetermined clearance therewith;a second core portion including a corrugated second cooling fin disposed between adjacent second tubes;a plurality of connecting portions for partially connecting said first cooling fin so as to have a predetermined clearance therebetween;a partition member disposed at end portions of said first core portion and second core portion for preventing the air bypassing said first core portion from flowing through said clearance between said first cooling fin and said second cooling fin; wherein,said corrugated first cooling fin includes a first projection portion projected from said first tubes toward said second tubes,said corrugated second cooling fin includes a second projection portion projected from said second tubes toward said first tubes,a first plurality of louvers are formed on said corrugated first cooling fin in a range from said adjacent first tubes to said first projection portion continuously,a second plurality of louvers are formed on said corrugated second cooling fin in a range from said adjacent second tubes to said projection portion continuously,a turning louver is provided among one of said first and second plurality of louvers for turning a fluid flowing outside of said tubes,a number of said louvers is different between both sides of said turning louver;wherein a central axis of said turning louver is off set to a central axis of a respective one of said adjacent first and second tubes in its cross sectional longitudinal direction.