| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an evaporator wherein spiral flow channels are hermetically formed and zoned; a method for manufacturing the evaporator; and a hydrogen generator and a fuel cell system each possessing the evaporator.SOLUTION: An inner cylinder 20 and an outer cylinder 21 are coaxially positioned, and a metal powder 22 is filled into the gap of the inner cylinder 20 and outer cylinder 21. Next, the outer circumferential surface of the outer cylinder 21 is irradiated with high-energy rays b such as laser beams, electron beams, plasmas, etc. from an irradiator 24. The metal powder 22 in-between the site of the outer cylinder 21 irradiated with the high-energy rays b and at least the outer circumferential surface of the inner cylinder 20 opposing the former is then melted. A spiral body 25 is formed by mobilizing the high-energy ray-irradiated site along a spiral direction.</p> |
