| 摘要 |
The present invention relates to a heat exchanger for cooling a fluid such as coolant or oil and, more specifically, to a heat exchanger which includes a heat transfer unit of a hole or a groove shape formed in a head bar, and thus allows additional air flow through the heat transfer unit, thereby increasing the heat exchange efficiency, and which provides a space where heated air during a brazing operation can flow by forming a heat transfer groove in the head bar, thereby increasing the heating speed of the head bar and preventing bonding failure. |
