Patent ID: 6922594

Claim:
A controlling device which performs control using two controllers within a predetermined energy consumption amount, characterized by comprising: (1) a preferential controller which calculates a manipulated variable output in accordance with a first manipulated variable output upper limit; (2) a non-preferential controller which calculates a manipulated variable output in accordance with a second manipulated variable output upper limit; (3) a preferential upper limit processing section which limits a value of the first manipulated variable output upper limit input in advance and gives the first manipulated variable output upper limit to said preferential controller so as to adjust the manipulated variable output of said preferential controller to not more than a predetermined value representing a manipulated variable output upper limit of a whole apparatus; (4) a non-preferential upper limit calculating section which calculates the second manipulated variable output upper limit and gives the second manipulated variable output upper limit to said non-preferential controller so as to adjust a sum of the manipulated variable outputs of said preferential and non-preferential controllers to not more than the predetermined value; and (5) a preferential upper limit calculating section which performs calculation of increasing/decreasing the first manipulated variable output upper limit in accordance with a margin of the manipulated variable output of said non-preferential controller with respect to the second manipulated variable output upper limit, and gives a calculated value as the first manipulated variable output upper limit in a next control cycle to said preferential upper limit processing section.