| 摘要 |
PURPOSE:To enable normally stable cooling (heating) operation at a heat exchange capacity on the outdoor side matching the number of operating indoor machines, by a method wherein the two refrigerant flow passages of the heat exchanger on the outdoor side are individually or simultaneously used at the operating capacity of capacity variable compressor. CONSTITUTION:Two-way valves 17a and 17b are situated to the inlet and the outlet of a heat exchanger A15 on the outdoor side, and two-way valves 18a and 18b are similarly situated to the inlet and the outlet of a heat exchanger B16 on the outdoor side. A ratio in size between the heat exchanger A15 on the outdoor side and the heat exchanger B16 on the outdoor side is 1:2. When a capacity of an outdoor machine 1 is 10HP, the heat exchanger A15 on the outdoor side has a capacity equivalent of 3.3HP, and the heat exchanger B16 on the outdoor side has a capacity equivalent to 6.7HP. As noted above, the heat exchanges A15 and B16 on the outdoor side having different capacity are interconnected in parallel, and by controlling the two-way valves mounted to the respective inlets and outlets, the two-way valves 17a, 17b, 18a, and 18b are opened and closed according to the number of operating indoor machines 7 (a total operating horse power). By switching the heat exchangers A15 and B16 on the outdoor side, stable operation is practicable at a normally proper indoor and outdoor heat exchange capacity. |
