PURPOSE: To cool hollow conductors efficiently by a method wherein two adjacent layers of hollow conductor disc-type coils make one pair and one or a plurality of pairs compose one refrigerant circulation path and the outermost layer of each pair is used as a supplying end and a recovery end of the refrigerant.
CONSTITUTION: A hollow conductor is wound in layers along the radius direction to form one unit of disc-type 10 or 11. These units are arranged in plural layers and two adjacent disc-type coils 10 and 11 make ne pair. One of the hollow conductors 10a and 11a which occupy the outermost layers of both unit disc-type coils 10 and 11 respectively is used as a supplying end and another is used as a recovery end of the refrigerant. The refrigrant supplied from the hollow conductor 10a circulates in the disc-type coi 10 toward the hollow conductor 10b which occupies the innermost layer to reach the hollow conductor 11b which occupies the innermost layer of the disc-type coil 11 and is recovered from the hollow conductor 11a. With above cnstitution, the circulation path can be shortened and the hollow conductors can be cooled efficiently.
KUBO HIROSHI
OSHIMIBE MITSUMASA
EJIRI HIROMICHI
KUWATA MINORU
SUMITOMO ELECTRIC INDUSTRIES
NISSIN ELECTRIC CO LTD
| JP41001726A |