Hot gas defrost system
Movable expansion valve
Refrigeration system
Reverse cycle heat pump
Reverse cycle heat pump circuit
Reverse-flow air conditioner
Reversible refrigerant system and four-way reversing valve there
Reversible-cycle closed-circuit refrigeration systems
Reversing valve means for use with a reversible refrigerating cy
Self operating excess refrigerant storage system for a heat pump
Split heat pump outdoor fan arrangement
Split system air conditioner adapted to receive a water preheate
Suction-liquid heat exchanger having accumulator and receiver
Tri-level multi-cylinder reciprocating compressor heat pump syst
Windmill operated system