| 摘要 |
PROBLEM TO BE SOLVED: To reduce the cost of serialized air conditioning systems and to improve service properties thereof by controlling a plurality of air conditioning systems different in a capacity class on the basis of a multivariable control unit of one kind. SOLUTION: A multivariable control unit 53 receives a deviationΔT2 of a discharge temperature calculated by a first deviation calculating part 55 and a deviationΔTe(ΔTc) of a refrigerant temperature calculated by a second deviation calculating part 56 as two inputs and leads out control amountsΔHz andΔEv of the capacity of a compressor and the valve travel of a motor operated expansion valve on the basis of prescribed dynamic models. An operation amount regulating part 57 conducts correction of multiplying each of the control amountsΔHz andΔEv by a prescribed constant corresponding to a capacity class of an air conditioning system and outputs a frequency command signal to the compressor and a valve travel command signal to the motor operated expansion valve respectively on the basis of control amountsΔHz2 andΔEv2 after the correction. |
