| 摘要 |
The present invention relates to a frictional heating unit for a frictional heating system. The purpose of the present invention is to provide the frictional heating unit comprising: a fixture used for a boiler and a frictional heating system and having an inner groove and having a recessed part or a protrusion part in the outside of an inner portion; and one or more disks connected to a rotational shaft to be rotated in the inner groove of the fixture. |
