| 摘要 |
PURPOSE:To improve the respondense of the temp. of a bath by adding heater power calculated so as to regulate the degree of opening of a shutter to a prescribed value to heater power corresponding to the extent of evaporation in a system for controlling the extent of evaporation and by raising the temp. of the bath. CONSTITUTION:A comparator 18 for comparing the degree of opening of a shutter calculates heater power B so as to regulate the degree of opening of a shutter 8 detected by a detector 16 to a prescribed value E and outputs the heater power B. A heater power controller 13 controls heater power so that the power is made equal to the sum of heater power A corresponding to the extent of evaporation and the heater power B calculated by the comparator 18. Other factors are controlled as controlled in a conventional control system. The respondense of the temp. of the bath is improved by the heater power B, the degree of opening of the shutter can be rapidly returned to the set value, and the temp. of the bath can be well adapted to the following change in the extent of evaporation.
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