| 摘要 |
PROBLEM TO BE SOLVED: To bring the controlled quantity close to the objective value quickly and accurately so as to stabilize an air conditioner, by changing the velocity of opening and closing of a valve, according to the present opening of the valve. SOLUTION: The proportional band P of the deviation >=T in proportioning action and the specified operation time TB corresponding to the proportional band P are set in advance, and in the proportional relation between this proportional band P and the specified operation time TB, the valve operation time TON=b corresponding to the present quantity of deviation >=T=a is obtained, and actual operation time Ts is obtained by multiplying this obtained valve operation time TON=P by the present aperture S of an motor-driven valve, and the motor-driven valve is operated to open or close by the actual operation time Ts each time between the specified operation time TB and the next. |
