| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a simplified heater maintaining a whole solution at an even temperature even in solution heating wherein forced agitation such as by a propeller is not favorable, and durable against problems such as vibration impact such as in moving, and a severance of wire in a heating element. <P>SOLUTION: To provide the small and easy to move simplified heater with high reliability, substances with different heat conductivity are sequentially attached around the longitudinally long and slender heating element arranged in a tank so that a substance with high heat conductivity is attached to a lower part, and substances with lower heat conductivity is attached in proportion to height, and natural convection is generated to agitate the solution. Temperature control is carried out by assembling a bridge circuit by a plurality of heating elements and the same number of constant resistors, and controlling electricity input. Even when there is a severance of wire in at least one of the plurality of heating elements, heating is maintained and continued by the rest of heating elements to provide the reliable heater with a small number of components. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
