Combined ambient-air and earth exchange heat pump system

摘要: An improved combined ambient-air and earth exchange heat pump system includes a subterranean exchanger (11) an (13), both refrigerant-based, which are adapted to be selectively operated individually, serially or in parallel for heating cooling purposes. The also dynamic load (17), reversing valve (9) converting the from vice versa, storage excess refrigerant including accumulator (111), optional preheat (37), regulating assembly (59) with bleed port arrangement, bypass mechanism (131) repetitive start-up attempts, lost charge device (113). A control center (34) is provided automatically activate (13) assist after thermal stressing about latter, deactivate ambient conditions below preset temperature, increase decrease number of tubes (92) used by (11).