| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent scale buildup on a heating section by transferring ultrasonic vibration to the heating section without thermally damaging an ultrasonic vibration means, in a scale prevention device of the heating section utilizing ultrasonic vibration. <P>SOLUTION: A water level of a water tank 1 is lowered, and a gas such as the air is introduced between an installation section of the ultrasonic vibration means 9 and the heating section 2 during a heating operation of the heating section 2, thus transferring of heat from the heating section 2 to the ultrasonic vibration means 9 is suppressed, and the ultrasonic vibration means 9 is prevented from being thermally damaged. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
