| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for promoting further utilization of natural energy using a combined cycle.SOLUTION: Using a combined cycle composed of a first cycle and a second cycle, unused heat energy which is conventionally emitted from a condenser to the atmosphere for cooling a coolant is utilized by heat exchange with a coolant of the second cycle. First, the coolant of the first cycle compressed by a compressor 3 of the first cycle flows into the condenser 4, and raises the temperature of the coolant of the second cycle. Then the coolant of the first cycle passes through an expansion valve 20, and performs a cooling operation by a first indoor heat exchanger 9. The coolant of the second cycle whose temperature is raised in the condenser by the coolant of the first cycle becomes a low pressure and low temperature coolant by an expansion valve 26 of the second cycle through a second condenser 7, performs a cooling operation by a second indoor heat exchanger 5, is pressurized by a coolant pump 6, and returns to the condenser. Thereby, since the cooling capability of the second indoor heat exchanger is added to the cooling capability of the first indoor heat exchanger, cooling efficiency is substantially increased. |
