PORTABLE INDUCTION HEATING TOOL FOR SOLDERING PIPES HAVING A U-SHAPED HEAD PORTION COMPRISING AN INDUCTION COIL

摘要

A portable induction tool (10) is provided for soldering or brazing sections of metal pipe tog they. A work coil head (20), with induction coil (34), is U-shaped, allowing placement of the head (20) around lengths of pipe, heating a susceptor, e.g., the pipe, to form a joint, and then to be wit drawn after the pipe joint is made. In one form, the tool (10) uses heat pipes (32) to remove he mal energy from the head (20), and also heat exchanger (50) for higher-powered units. Power capacitors (46) are generally included with the induction coil (34) to create a tank circuit of a resonant frequency. The induction coil (34) uses Litz wire, copper tubing, or heat pipes with a conductive outer skin to carry the high-current being delivered to the induction coil (34). The induction coil (34) has a general racetrack configuration, which is typically wound in a U-shape or as a semicircle as a single winding, with multiple turns.