Heat-dissipating apparatus

A heat-dissipating apparatus comprising:

• a cooling tube having:
• a body having two ends, a periphery, an inner wall and an inner space;
• two open ends respectively formed at the two ends of the body, each open end having an inner rim;
• and
• an inlet and an outlet formed on the periphery of the body and communicating with the inner space defined by the body;
• a tubular conductor mounted in the cooling tube with an outer surface of the tubular conductor engaging the inner rim of each open end to seal the open ends, defining a cooling chamber between the inner wall of the body of the cooling tube and the tubular conductor, and having an inner wall;
• and
• a heat sink made of a heat-conducting metal material, mounted inside the tubular conductor, having multiple fins formed by continuously folding a metal sheet in a corrugated and annular form and abutting against the inner wall of the tubular conductor, and defining multiple cooling channels between the inner wall of the tubular conductor and the fins.