Heat exchanger and heat pump circuit

Details Heat exchanger and heat pump circuit Heat exchanger and heat pump circuit

F - Mech Eng,Light,Heat,Weapons

28

D

F28D 7/06 (2006.01) F25B 30/02 (2006.01) F25B 30/06 (2006.01) F25B 13/00 (2006.01)

Patent

CA 2178981

A heat exchanger and heat pump circuit having an operating subcircuit and a pump down subcircuit each including a liquid line and a heat transfer tube. The heat transfer tube of the pump down subcircuit surrounds the liquid line of the operating subcircuit. During the heating cycle, the heat pump circuit circulates refrigerant through both subcircuits to abstract heat from the heat source/sink. However, during the cooling cycle, the heat pump circuit circulates refrigerant only through the operating subcircuit. Also during the cooling cycle, the heat pump circuit places the pump down subcircuit at low pressure to thermally insulate the operating subcircuit liquid line.

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