| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioning system capable of reducing equipment costs and improving controllability of a blowing-out temperature.SOLUTION: In a direct expansion type air-conditioning control system provided with a heat pump type refrigerant circuit formed by connecting an outdoor unit 24 and an indoor unit 32, and conditioning the indoor air by an indoor heat exchanger, the plurality of sets of indoor heat exchangers of the refrigerant circuit have a plurality of stages of distribution flow channels connected in parallel to the refrigerant circuit, indoor expansion valves 26 are respectively disposed on each of the stages of distribution flow channels so that each of the distribution flow channels can be opened and closed, control means controls opening/closing of the indoor expansion valves 26 of the plurality of stages of the distribution flow channels of the refrigerant circuit to control the number of stages of the indoor heat exchangers on the basis of the difference between the inlet temperature and the outlet temperature of the indoor heat exchanger, and the number of outdoor units 24 is controlled by stopping a compressor of the corresponding outdoor unit 24 when all of the plurality of stages of indoor expansion valves 26 of the refrigerant circuit are closed.SELECTED DRAWING: Figure 1 |
