Heat exchanger apparatus including auxiliary radiator for cooling exothermic component

A heat exchanger apparatus comprising:

• a condenser having a core portion including a tube extending in a refrigerant flow direction in which refrigerant flows, an inlet tank connected to the core portion and having an inlet for conducting the refrigerant into the tube, and an outlet tank connected to the core portion and having an outlet for discharging the refrigerant from the tube, the condenser being for cooling the refrigerant flowing in the tube by heat exchange with cooling air flowing outside of the tube;
• an auxiliary radiator for cooling an exothermic component, the auxiliary radiator being disposed on a cooling air upstream side of the condenser;
• and
• a receiver communicating with the core portion of the condenser for separating the refrigerant cooled in the core portion into gaseous refrigerant and liquid refrigerant;
• wherein:
• the core portion of the condenser is divided along the refrigerant flow direction into a first region and a second region closer to the outlet than the first region;
• only the first region faces the auxiliary radiator;
• the first region has a width approximately equal to a width of the auxiliary radiator in the refrigerant flow direction;
• the core portion of the condenser has a condensation part for condensing the refrigerant between the inlet tank and the receiver and a supercooling part for supercooling the liquid refrigerant separated by the receiver between the receiver and the outlet tank;
• and
• the second region is at least part of the supercooling part;
• the supercooling part has a height B1 in a height direction perpendicular to the refrigerant flow direction;
• the auxiliary radiator has a part facing the supercooling part with a height A1 in the height direction;
• and
• a ratio of the height A1 relative to the height B1 is equal to or less than 0.85.

A heat exchanger apparatus comprising:

• a first heat exchanger having a core portion including a plurality of tubes in which first fluid flows in a first fluid flow direction to exchange heat with air flowing outside the core portion in an air flow direction, an inlet tank communicating with the core portion for conducting the first fluid therein, and an outlet tank communicating with the core portion for discharging the first fluid therefrom, the plurality of tubes of the core portion extending in the first fluid direction, and including a first group of tubes directly communicating with the inlet tank and a second group of tubes directly communicating with the outlet tank;
• and
• a second heat exchanger disposed on an air upstream side of the first heat exchanger for exchanging heat between a second fluid different from the first fluid and flowing therein and the air, the second heat exchanger including a first part facing the first group of tubes and a second part facing a part of the second group of tubes, wherein:
• the second part of the second heat exchanger has a height A1 in a height direction perpendicular to the first fluid flow direction;
• the second group of tube has a height B1 in the height direction;
• and
• a ratio of the height A1 relative to the height B1 is equal to or less than 0.85.