Patent ID: 9080778
Filing Date: 2015-07-14
Classification: F24D,F24F,F24H,F25B,Y02B,Y02E

Abstract:
1. An air-conditioning hot-water supply combined system, comprising: at least one heat source unit including at least a heat source side compressor and a heat source side heat exchanger; a plurality of load side units connected in parallel to the heat source unit, the load side units each including at least a load side heat exchanger; a hot water unit connected in parallel to the heat source unit, the hot water unit including at least a refrigerant-to-refrigerant heat exchanger, a water heat exchanger, and a hot water unit side compressor; and at least one relay unit disposed between the heat source unit, and the load side units and the hot water unit, the relay unit being configured to transfer heating energy or cooling energy generated in the heat source unit to the load side units and the hot water unit; a controller configured to: calculate a current input (A) which is a sum of a current input of the heat source side compressor and a current input of the hot water unit side compressor; calculate a first predicted input value (B) which is derived on a predetermined association that a condensing temperature is increased by ΔCT relative to the current input (A); and calculate a second predicted input value (C) which is derived on a predetermined association that the condensing temperature is reduced by ΔCT relative to the current input (A), wherein in a cooling main operation mode in which a cooling load is higher than a heating load and the hot water unit is operated, in a case where the current input (A) is larger than the first predicted input value (B), the controller increases a target condensing temperature of the heat source unit by ΔCT, and in a case where a current input (A), which is a sum of a current input of the condensing temperature is increased by ΔCT relative to the current input (A), a target in a case where the current input (A) is less than or equal to the first predicted input value (B), and the current input (A) is larger than the second predicted input value (C), the controller reduces the target condensing temperature of the heat source unit by ΔCT.