Method for adapting heat pump heating system for summer cooling use has three way valves directing brine circulated earth circuit to circulate cooling liquid

摘要

The heat pump compressor (1) circulates warm liquid refrigerant through the hot water tank (22) via a three way valve (4) which switches the circulation through an earth circuit (11,12) through a summer evaporator (15) and pump (18) when three way valves (16,17,18,19) are reversed.