Heat exchanger having several exchanging portions

A heat exchanger comprising:

• a plurality of first tubes in which a first refrigerant flows;
• a plurality of second tubes in which a second refrigerant flows, said second tubes being disposed in parallel with said first tubes;
• and
• a cooling fin in which a plurality of folded portions is formed continuously in a corrugated shape, said cooling fin being disposed between adjacent first tubes and adjacent second tubes,
• wherein said cooling fin includes a plurality of slit-shaped recess portions formed between said first tubes and said second tubes, a longitudinal direction of said recess portions crossing a ridge direction of said folded portions with a predetermined angle, and said recess portions being formed so as to cross over a plurality of said folded portions.

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;
• a plurality of clearances disposed between said corrugated first cooling fin and said corrugated second cooling fin, said plurality of clearances being formed by said plurality of connecting portions;
• 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 cool fin;
• wherein at least two of said folded portions of said first and second cooling fins are formed between adjacent connecting portions.

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;
• and
• a plurality of connecting portions for partially connecting said first cooling fin and said second cooling fin;
• a plurality of clearances disposed between said corrugated first cooling fin and said corrugated second cooling fin, said plurality of clearances being formed by said plurality of connecting portions;
• wherein at least two of said folded portions of said first and second cooling fins are formed between adjacent connecting portions;
• wherein said clearance between said first cooling fin and said second cooling fin has a distance (Ls) being equal to 5.0 mm or less.

A heat exchanger comprising:

• a plurality of first tubes in which a first refrigerant flows;
• a corrugated first cooling fin in which a plurality of folded portions is formed continuously, said corrugated first cooling fin being disposed between adjacent first tubes;
• a plurality of second tubes in which a second refrigerant flows, said second tubes being disposed in parallel with said first tubes;
• a corrugated second cooling fin in which a plurality of folded portions is formed continuously, said corrugated second cooling fin being disposed between adjacent second tubes;
• and
• a plurality of connecting portions for connecting a side end portion facing the adjacent second cooling fin of said first cooling fin and a side end portion facing the adjacent first cooling fin of said second cooling fin so as to have a predetermined clearance therebetween,
• wherein at least two of said folded portions of said first and second cooling fins are formed, between adjacent connecting portions;
• said corrugated first cooling fin includes a first projection portion projected form 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 second 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.

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.

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 and said second cooling fin so as to have a predetermined clearance therebetween;
• wherein said clearance between said first cooling fin and said second cooling fin has a distance (Ls) being equal to 5.0 mm or less;
• 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 second projection portion continuously;
• a turning louver is provided among one of said first and second plurality of louvers for tuning 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.

A heat exchanger comprising:

• a plurality of first tubes in which a first refrigerant flows;
• a plurality of second tubes in which a second refrigerant flows, said second tubes being disposed in parallel with said first tubes;
• and
• a cooling fin in which a plurality of folded portions is formed continuously in a corrugated shape, said cooling fin being disposed between adjacent first tubes and adjacent second tubes,
• wherein said cooling fin includes a plurality of slit-shaped recess portions formed between said first tubes and said second tubes, a longitudinal direction of said recess portions crossing a ridge direction of said folded portions with a predetermined angle, and said recess portions being formed so as to cross over a plurality of said folded portions;
• and
• a plurality of connecting portions being formed between said plurality of slit-shaped recess portions.