AIR-COOLING HOT-WATER SUPPLY DEVICE AND AIR-COOLING HOT-WATER SUPPLY METHOD

摘要

Provided is an air-conditioning hot-water supply complex system for simultaneously executing an air-cooling operation and a hot-water supply operation, wherein by controlling the operation of a compressor, hot-water supply is completed with high efficiency in a short time to prevent hot water from running out. When simultaneously performing an air-cooling operation of a use unit (303) and a hot-water supply operation of a hot-water supply unit (304), an air-conditioning hot-water supply complex system (100) operates in an air cooling priority mode in which the operation frequency of a compressor (1) is controlled according to a differential temperature between the suction air temperature of the use unit (303) and the indoor set temperature of the use unit (303) when a differential temperature (?Twm) between a set hot-water supply temperature (Twset) and an inlet water temperature (Twi) of water flowing to a plate water heat exchanger (16) is smaller than a predetermined priority operation determination threshold value (M), and operates in a hot-water supply priority mode in which the operation frequency of the compressor (1) is controlled according to a differential temperature between the set hot-water supply temperature (Twset) and the water temperature in a hot-water supply tank (305) when the differential temperature (?Twm) is higher than or equal to the priority operation determination threshold value (M).