| 摘要 |
PROBLEM TO BE SOLVED: To provide a portable type electric calcination oven capable of using a 100V receptacle in a room as an electric source, capable of being easily brought out on a table, and enabling an automatic calcination in an simple operation comprising only lighting a calcination color lamp. SOLUTION: The ends 1-7 of plural heat-generating wires 1-7 in a calcination chamber are connected in series outside the calcination chamber, and lead wires 9-11 are taken out from both the ends of the heat-generating wires connected in the series and from necessary connected wire sites. The lead wires are switched with switches 15-17 to form series circuits, parallel circuits, short circuits and circuits comprising the combinations of the circuits. Thus, the heat generation of the heat-generating wires 1-7 connected in the series can be changed into a plurality of heat generations, and the heat generation amounts and heat generation amount released from the calcination chamber are balanced each other to obtain plural set temperatures for the automatic calcination. |
