Hitachi Cable, Inc.

Ken Horiguchi

Kenichi Inui

Katsumi Nomura

Yusuke Takenaga

Tomo Kawano

Mamoru Hofuku

Mamoru Houfuku

A heat transfer pipewith grooved inner surface is provided with a pipe bodyhaving a pipe axis line &#x25ef; as a center axis line, a plurality of first finseach having a fin height Hf, formed by providing a plurality of spiral groovesat an inner surface of the pipe bodyalong the pipe axis line &#x25ef; and at least a second finhaving a fin height hf, provided at a groove bottom of at least one of the spiral groove. The fin height hf and a torsion angle &#x3b1; of the second finare determined respectively to satisfy the following conditions:/15&#x2266;/3 and &#x3b1;=&#x3b2;,

Heat transfer pipe with grooved inner surface

A level wound coil (LWC) having a plurality of coil layers each of which has a pipe wound in alignment winding and in traverse winding. The LWC has a shift section where the pipe is shifted from the m-th coil layer to the (m+1)-th coil layer on a bottom surface thereof when the LWC is disposed on a mount surface. The shift section has the k-th shift section on inner layer side and the (k+1)-th shift section on outer layer side, where a start point of the (k+1)-th shift section does not transit, relative to a start point of the k-th shift section, to a winding direction of the pipe.

Level wound coil, method of manufacturing same, and package for same

A level wound coil (LWC) having a plurality of coil layers each of which has a pipe wound in alignment winding and in traverse winding. The LWC has a shift section where the pipe is shifted from the m-th coil layer to the (m+1)-th coil layer on a bottom surface thereof when the LWC is disposed on a mount surface. The shift section has the k-th shift section on inner layer side and the (k+1)-th shift section on outer layer side, where a start point of the (k+1)-th shift section does not transit, relative to a start point of the k-th shift section, to a direction reverse to a winding direction of the pipe. A length of the shift section that does not transit to the reverse direction is controlled.

A level wound coil (LWC) mounted on pallet having; an LWC having a plurality of coil layers each of which has a pipe wound in alignment winding and in traverse winding; and a pallet on which the one or more LWC is mounted or on which the one or more LWC is mounted through a cushioning material. The LWC has a shift section where the pipe is shifted from the m-th coil layer to the (m+1)-th coil layer on a bottom surface thereof when the LWC is disposed on the mount surface. A start point of a (k+1)-th shift section does not transit, relative to a start point of a k-th shift section, in a reverse direction to a winding direction of the pipe. The pallet or the cushioning material has a recessed area that is formed at all or a part of a portion of the pallet or the cushioning material to face the (k+1)-th shift section not transiting in the reverse direction.

Growing community of inventors

Tsuchiura, Japan

Ken Horiguchi