HEAT EXCHANGER

摘要

In a composite-type heat exchanger capable of exchanging heat among three types of fluids, an outside air passage is provided in a periphery of refrigerant tubes and coolant tubes, and the outside air passage includes outer fins that promote heat exchange among a refrigerant, an outside air and a coolant. The outer fins include refrigerant side heat connecting portions configured to thermally connect the refrigerant tubes, and coolant side heat connecting portions configured to thermally connect the refrigerant tubes and the coolant tubes. In a first core portion including most downstream refrigerant tubes which constitute a final path, which is the most downstream side path in a direction of the refrigerant flow, the refrigerant side heat connecting portions is larger in number than the coolant side heat connecting portions.

主权项

1. A heat exchanger including:
a plurality of first tubes in which a first fluid flows; a plurality of second tubes in which a second fluid flows; a heat exchange portion including the plurality of first tubes and the plurality of second tubes arranged in a stacked manner and configured to radiate heats of the first fluid and the second fluid to a third fluid; a third fluid channel in which the third fluid flows, the third fluid channel being provided in a periphery of the plurality of first tubes and the plurality of second tubes; and an outer fin arranged in the third fluid channel to promote a heat exchange between the first fluid and the third fluid and a heat exchange between the second fluid and the third fluid, wherein the outer fin includes first heat connecting portions thermally connecting the plurality of first tubes, and second heat connecting portions thermally connecting the plurality of first tubes and the plurality of the second tubes, the plurality of first tubes is divided into a plurality of groups, the plurality of groups of the plurality of first tube are paths through which the first fluids distributed from a same space flow in a same direction, the plurality of first tubes include most downstream first tubes which constitute a part of a final path that is a most downstream path in a flowing direction of the first fluid, the heat exchange portion includes a first core portion including the most downstream first tubes, and the first heat connecting portions are larger in number than the second heat connecting portions in the first core portion.