| 摘要 |
PURPOSE:To control the gas temperature in accordance with a function programmed arbitrarily by controlling a mixing ratio so that a temperature of mixed gas is varied in accordance with a programmed function. CONSTITUTION:Gas supply devices 1, 2 supply hot air of different temperatures of 120 deg.C and 250 deg.C from nozzles 3, 4, respectively. A pump 5 supplies gas to the supply devices 1, 2. In such a state, a mixing device 6 mixes the hot air supplied from the nozzles 3, 4. Also, its mixing ratio is controlled by a signal 7 from an automatic control circuit 8. The control circuit 8 measures a temperature of an air-fuel mixture fed out of the mixing device 6 by a thermocouple of a measuring device 9, and also, compares its measured value with a given temperature function 10, and generates the signal 7 so that the temperature of the air-fuel mixture coincides with the given temperature function 10. In such a way, by mixing gas of different temperatures, a temperature of hot air can be varied in accordance with the temperature function 10 programmed arbitrarily through the automatic control circuit 8.
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