| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve the problem of a conventional synthetic resin pipe for absorbing geothermal heat that positioning, especially of a large diameter pipe, is difficult because the pipe itself deforms when it is buried and a jig for inserting a dedicated core in order to prevent significant variation in the cross-sectional profile of a hole under boring is required at the time of boring a hole for introducing outdoor air in the side face of the pipe or a dedicated jig for securing a large diameter pipe on a long table is required. SOLUTION: In case of a multilayer pipe, an outer tank located on the outermost side is made of an aluminum extrusion material. The pipe has a structure of single aluminum extrusion material and when the pipe has a large diameter, it is divided circumferentially into a plurality of parts which are jointed by means of a flange formed in the axial direction of the pipe. Furthermore, cross- section perpendicular to the axis in the pipe is divided into a plurality of parts by means of a baffle plate made of aluminum or synthetic resin. Supplied air is caused to flow up and down repeatedly in a direction parallel with the axis of the pipe while touching the outer tank.</p> |
