| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat pump system which can further save energy.SOLUTION: A controller 100 includes: a cost comparison part 21; a cost difference operation part 13; a cost difference comparison part 14; a heating cost variation difference operation part 31; a cost variation comparison part 34; and a preferential heat source determination part 40 for determining that a heat source machine to be prioritized is a heat pump device when a heating cost H is larger than a heating cost, a cost difference 13a is equal to a heating cost variation difference threshold 12a or smaller, an H/P cost variation 35a is a negative value, and a cost variation difference 33a is equal to a heating cost variation difference threshold 32a or larger. |
