| 摘要 |
PROBLEM TO BE SOLVED: To enable an air conditioning operation to be precisely controlled while being highly resistant against a disturbance. SOLUTION: There is provided a low pressure sensor to detect and output an evaporating temperature of refrigerant in a refrigerant circuit (12). A single variable controller (42) has a dynamic model of a refrigerant circuit in which a capacity of a compressor is applied as a control input and a refrigerant temperature is applied as a control output. The single variable controller (42) operates such that a deviation between a detected evaporating temperature of the low pressure sensor and a target evaporating temperature is applied as one input in response to the dynamic model and in turn, a control amount of capacity of the compressor is fed out, the capacity of the compressor is applied as one output, so that a capacity instruction signal is output to the compressor.
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