| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioning system of low costs and high efficiency by comprising an AHU using a refrigerant of a heat pump cycle as a heat source, and reducing an ON/OFF cycle operation of a compressor in low load.SOLUTION: An air conditioning system includes a plurality of outdoor units 4, an air handling unit 2, a plurality of independent heat pump cycles constituted by connecting the plurality of outdoor units 4 and the air handling unit 2 by refrigerant pipes 6, and respectively having a compressor 41, an indoor heat exchanger 27, an expansion valve 44 and an outdoor heat exchanger 43, and a number control portion 5b controlling the number of operated compressors 41 and an operational frequency of each operated compressor 41 on the basis of a specific frequency range corresponding to the compressor 41 to obtain a certain level or more compressor efficiency to satisfy a capacity request according to an air conditioning load.SELECTED DRAWING: Figure 2 |
