THREE-FLUID HEAT EXCHANGER AND AIR-CONDITIONING/WATER-HEATING SYSTEM USING SAME

摘要

In order to gain heat transfer efficiency in a heat exchanger between three fluids used in an air-conditioning cycle, a water-heating cycle, and a natural energy cycle and to reduce the size thereof, a three-fluid heat exchanger, which is used in an air-conditioning/water-heating system equipped with an air-conditioning refrigerant circuit, a water-heating refrigerant circuit, and a natural energy-using hot-water refrigerant circuit, and which exchanges heat between the air-conditioning refrigerant, the water-heating refrigerant, and the hot-water refrigerant, is formed from a plurality of inner pipes (101, 102) in which the air-conditioning refrigerant and the water-heating refrigerant respectively flow, and an outer shell (103) that encloses the plurality of inner pipes and in which the hot-water refrigerant (113) flows. Both of the inner pipes (101, 102) form a planar serpentine shape within the outer shell (103) comprising straight sections and curved sections, and partition plates (104), which partition the straight sections of the inner pipes, parallel the straight sections to form rectangular sections within the outer shell (103), and holes are formed therein through which the curved sections of the inner pipes pass.