| 摘要 |
<p>PURPOSE:To maintain the temperature of an object to be heated at a set value irrespectively of the load quantity, by comparing a function whose variables are outputs of an electric power detecting means and a means for detecting the temperature at the bottom of the object (vessel) to be heated with the output of a temperature setting means and controlling the electric power. CONSTITUTION:The temperature of an object O to be heated is detected by means of a temperature detecting means TD and the output f(Tp) of the means TD is used as one side input of an arithmetic means F. The output h(Pi) of an electric power detecting means PD is used as the other side input of the means F and the difference between both inputs is operated. Then an electric power varying means C is controlled so that the operated results can become a fixed value. Therefore, the temperature T0 of an object to be heated can be controlled by correcting the temperature Tp at the bottom of the object (vessel) to be heated through the input electric power Pi in accordance with the load quantity.</p> |
