Direct expansion heat pump

Details Direct expansion heat pump Direct expansion heat pump

F - Mech Eng,Light,Heat,Weapons

24

J

F24J 3/08 (2006.01) F25B 13/00 (2006.01) F25B 29/00 (2006.01) F25B 30/06 (2006.01)

Patent

CA 2122100

ABSTRACT OF THE DISCLOSURE A "DX" heat pump is provided herein which is based on the principle of providing optimal heat exchange in the heating mode through at least two, but up to five or more parallel ground loops, all but one of which can be cut off from the system and evacuated of refrigerant in the cooling mode, and selectively reintroduced as required in the cooling mode. The loops are designed in terms of volume so that the refrigerant charge is correct in the heating mode when split in the selected number of loops and also correct in the cooling mode when one or more loops are used, whereby it/they contain the full system refrigerant charge. The headers may be provided with solenoid valves which can be individually operated to provide a staged cooling system.

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