| 摘要 |
A composite heat exchanger configured to be capable of exchanging heat between three types of fluids, wherein an air passage (70a) through which external air circulates is formed on the perimeter of a refrigerant tube (12a) and a coolant tube (43a), there being arranged on the air passage (70a), an outer fin (70b) expediting heat exchange between a refrigerant and external air and between coolant and external air. The outer fin (70b) has a refrigerant-side thermal connection portion (71b) for thermally connecting refrigerant tubes (12a) to one another and a coolant-side thermal connection portion (72b) for thermally connecting a refrigerant tube (12a) to a coolant tube water (43a). In a first core section (701) configured from a downstream-most-refrigerant tube (121a) for forming a final path that is the downstream-most path of the refrigerant flow, the number of refrigerant-side thermal connection portions (71b) is greater than the number of coolant-side thermal connection portions (72b). Any decline in the heat exchanging performance of the heat exchanger as a whole is thereby minimized. |
