| 摘要 |
PURPOSE:To surely maintain the predetermined temp. in a drying oven at a time when temp. raising is completed, by automatically starting heating at the predetermined time calculated corresponding to an environmental condition such as the temp. of the oven prior to starting heating and the required temp. in the oven at the operation start time of the oven. CONSTITUTION:An operator preliminarily sets the temp. raising completion time t3 of a drying oven 1 and the desired temp. TSP in the oven at that time to a temp. raising curve operation circuit 5 by a setting part 3 and further sets a system start time t0 to an internal clock 4. When the system start time t0 arrives, the operation of each part is started and the atmospheric temp. TA at that point of time is measured by a sensor 7 to be transmitted to a temp. raising curve operation circuit 5 and added to the set desired temp. TSP in the oven to operate a temp. raising curve. From this temp. raising curve, the objective temp. TS in the oven at a time (t) is determined to be sent to a temp. comparing circuit 6 and, when actual oven internal temp. TO <= objective oven internal temp. TS is formed, a burner 11 is started.
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