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US 6,408,939 B1Granted
Double heat exchanger
AssigneeDenso Corporation
InventorsTatsuo Sugimoto, Satomi Muto, Takaaki Sakane
Life of this patent
Estimating the term…
Abstract
In a double heat exchange, a radiator and a condenser are integrated through a side plate for reinforcing the radiator and the condenser, and a longitudinal dimension of condenser tubes is made smaller than a longitudinal dimension of radiator tubes. Therefore, a core area of the condenser becomes smaller than that of the radiator. Thus, heat-exchanging capacity of the condenser is restricted from being increased more than a necessary capacity, and size and performance of the double heat exchanger are restricted from being increased more than necessary conditions.
Claims25
The heat exchanger comprising:
- a first heat-exchanging unit for performing heat exchange between a first fluid and air, said first heat exchanging unit includes
- a plurality of first tubes through which said first fluid flows,
- a plurality of first corrugated fins disposed between adjacent first tubes, and
- a first tank portion disposed to communicate with said first tubes, at both longitudinal ends of each aid first tube;
- a second heat-exchanging unit for performing heat exchange between a second fluid and air, said second heating-exchanging unit includes
- a plurality of second tubes through which said second fluid flows, said second tubes extending in parallel with said first tubes,
- a plurality of second corrugated fins disposed between adjacent said second tubes, and
- a second tank portion disposed to communicate with said second tubes, at both longitudinal ends of each said second tube;
- a side plate disposed in parallel with said first and second tubes, for reinforcing said first and second heat-exchanging units, wherein:
- said first and second heat-exchanging units are disposed to be integrated through said side plate;
- said second tubes have a tube dimension in a tube longitudinal direction of said second tubes, smaller than that of said first tubes, in such a manner that the first heat-exchanging unit has an overlapping portion overlapping with said second heat-exchanging unit in an air-flowing direction and a non-overlapping portion in the air-flowing direction;
- in the overlapping portion, air passes through both said first heat-exchanging unit and said second heat-exchanging unit;
- and
- in the non-overlapping portion, air only passes through the first heat-exchanging unit.
11 more elements
A heat exchanger comprising:
- a first heat-exchanging unit for performing heat exchange between a first fluid and air, said first heat-exchanging unit includes
- a plurality of first tubes through which said first fluid flows,
- plurality of first corrugated fins disposed between adjacent first tubes, and
- a first tank portion disposed to communicate with said first tubes, at both longitudinal ends of each aid first tube;
- a second heat-exchanging unit for performing heat exchange between a second fluid and air, said second heating-exchanging unit includes
- a plurality of second tubes through which said second fluid flows, said second tubes extending in parallel with said first tubes,
- a plurality of second corrugated fins disposed between adjacent said second tubes, and
- a second tank portion disposed to communicate with said second tubes, at both longitudinal ends of each said second tube;
- a side plate disposed in parallel with said first and second tubes, for reinforcing said first and second heat-exchanging units wherein;
- said first and second heat-exchanging units are disposed to be integrated through said side plate;
- said second tubes have a tube dimension in a tube longitudinal direction of said second tubes, smaller than that of said first tubes;
- said side plate includes a first side plate portion for reinforcing said first heat-exchanging unit, and a second side plate portion for reinforcing said second heat-exchanging unit;
- and
- said first and second heat-exchanging units are integrated by bonding said first and second side plate portions through brazing.
11 more elements
A heat exchanger comprising:
- a first heat-exchanging unit for performing heat exchange between a first fluid and air, said first heat-exchanging unit includes
- a first core portion having a plurality of first tubes through which said first fluid flows, and a plurality of first corrugated fins disposed between adjacent first tubes, and
- a first tank portion disposed to communicate with said first tubes, at both longitudinal ends of each said first tube;
- a second heat-exchanging unit for performing heat exchange between a second fluid and air, said second heat-exchanging unit includes
- a second core portion having a plurality of second tubes through which said second fluid flows and a plurality of second corrugated fins disposed between adjacent said second tubes, said second tubes extending in a direction parallel to said first tubes, and
- a second tank portion disposed to communicate with said second tubes, at both longitudinal ends of each said second tube;
- and
- a side plate disposed in parallel with said first and second tubes at an end of said first and second core portions, for reinforcing said first and second core portions,
- wherein each said first corrugated fin has a first fin height between adjacent first tubes, different from a second fin height of each second corrugated fin between adjacent second tubes.
6 more elements
A heat exchanger comprising:
- a first heat-exchanging unit for performing heat exchange between a first fluid and air, said first heat-exchanging unit includes a plurality of first tubes through which said first fluid flows;
- and
- a second heat-exchanging unit for performing heat exchange between a second fluid and air, said second heat-exchanging unit includes a plurality of second tubes through which said second fluid flows, where:
- said first heat-exchanging unit is disposed at a downstream air side from said second heat-exchanging unit linearly in an air-flowing direction;
- each of said first and second tubes is a flat-shaped tube having a major diameter dimension in the air-flowing direction and a minor diameter dimension in a direction perpendicular to both a tube longitudinal direction and the air-flowing direction;
- each minor diameter dimension of said second tubes is smaller than each minor diameter dimension of said first tubes;
- and
- each of said first tubes has a major diameter centerline corresponding to a major diameter centerline of each of said second tubes, said first tubes have a tube pitch equal to a tube pitch of said second tubes.
5 more elements
Dependencies are inferred from the claim text.