CONTROL DEVICE FOR HEAT-PUMP-USING SYSTEM, AND HEAT-PUMP-USING SYSTEM PROVIDED WITH SAME

摘要

A system control device 4 is provided with: a room temperature control unit 18 which generates a heat quantity command on the basis of the room temperature and a set room temperature; a frequency command generation unit 19 which generates a frequency command on the basis of the heat quantity command; a circulation-temperature-command generation unit 21 which generates a circulation temperature command on the basis of the heat quantity command; a circulation temperature control unit 21 which, on the basis of the circulation temperature and the circulation temperature command, generates a rotational frequency command using feedback control in which at least a proportionality coefficient is used; and a correction coefficient generation unit 22 which generates a correction coefficient on the basis of the circulation flow rate of a second heat medium and a preset circulation-flow-rate reference value. The circulation temperature control unit 21 calculates the proportionality coefficient by multiplying the correction coefficient and a preset proportionality-coefficient reference value. The correction coefficient generation unit 22 generates the correction coefficient such that, when the circulation flow rate increases higher than the circulation-flow-rate reference value, the proportionality coefficient increases higher than the proportionality-coefficient reference value, and, when the circulation flow rate reduces lower than the circulation-flow-rate reference value, the proportionality coefficient reduces lower than the proportionality-coefficient reference value.