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Improvements made to the cooling of coils of an induction heating system

  • US 5,430,274 A
  • Filed: 10/07/1994
  • Issued: 07/04/1995
  • Est. Priority Date: 06/24/1992
  • Status: Expired due to Term
First Claim
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1. An electromagnetic induction heating coil comprising:

  • a thermally conductive unitary cooling tube;

    a first conductor layer wound as a helix around an outer surface of the cooling tube, the cooling tube in thermal contact with only an inner surface of the helical layer;

    a second conductor layer, wound as a helix in an opposite sense, around the first conductive layer, and in thermal contact therewith, the helix of the second layer skewed relative to the cooling tube;

    both helical layers coaxial with the cooling tube; and

    cooling fluid circulating through only the interior of the tube for producing heat transfer from the conductor layer, through the tube, thereby cooling the conductor layer.

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