Double heat exchanger for vehicle air conditioner

A heat exchanger comprising:

• a first heat exchanger having a first core portion performing heat exchange between a first fluid flowing through the first heat exchanger and air passing through the first heat exchanger the first heat exchanger being an engine radiator for cooling the first fluid to be introduced into an engine;
• a second heat exchanger having a second core portion performing heat exchange between a second fluid flowing through the second heat exchanger and air passing through the second heat exchanger to cool the second fluid, the second heat exchanger being an inverter radiator for cooling the second fluid to be introduced into an inverter;
• a third heat exchanger disposed at an upstream air side of the first and second heat exchangers, the third heat exchanger being a condenser having a third core portion for cooling and condensing high temperature refrigerant by performing heat exchange between the refrigerant flowing therethrough and air, the third core portion having a cooling part and a super-cooling part downstream of the cooling part in a refrigerant flow of the third core portion;
• a receiver for separating refrigerant from the cooling part into gas refrigerant and liquid refrigerant, the receiver being disposed between the cooling part and the super-cooling part in a refrigerant flow such that the liquid refrigerant is introduced to the super-cooling part, wherein:
• the first core portion, the second core portion and the third core portion are disposed in such a manner that the refrigerant flows through the third core portion approximately in parallel with the first fluid flowing through the first core portion and the second fluid flowing through the second core portion;
• the first core portion has a core area that is set larger than that of the second core portion;
• the cooling part of the third core portion has a core area that is set larger than that of the super-cooling part of the third core portion;
• the second core portion is disposed opposite to the super-cooling part of the third core portion;
• the first heat exchanger includes a first inlet pipe through which the first fluid from the engine flows into the first core portion and a first outlet pipe through which the first fluid from the first core portion flows out of the first heat exchanger;
• the second heat exchanger includes a second inlet pipe through which the second fluid from the inverter flows into the second core portion and a second outlet pipe through which the second fluid from the second core portion flows out of the second heat exchanger;
• and
• the first core portion is disposed opposite to the cooling part of the third core portion.