Refrigeration – Structural installation – Geographic – e.g. – subterranean feature
Patent
1995-07-07
1997-07-29
Doerrler, William
Refrigeration
Structural installation
Geographic, e.g., subterranean feature
623246, 165 45, F25D 2312
Patent
active
056512651
ABSTRACT:
A ground source heat pump system including an indoor fan coil, a high torque compressor, a thermostatic expansion valve (TXV), a suction gas distributor, an accumulator with an internal heat exchanger and an arrangement of check valves to permit a single direction of refrigerant flow in both the heating and cooling modes. Only one TX valve is required providing simplicity for the system. A backflooding control valve is used in the system to control condenser pressures to assure proper refrigerant quantity and pressure at the TX valve. The heat pump also uses a head pressure control valve to maintain a pre-set refrigerant pressure in the ground coil on air conditioning mode. The system charge is the same for heating and cooling and the ground coil consists of a plurality of three pipe units--one pipe for inflow and two for out flow.
REFERENCES:
patent: 3552140 (1971-01-01), Palmer
patent: 3938349 (1976-02-01), Ueno
patent: 5038580 (1991-08-01), Hart
patent: 5136855 (1992-08-01), Lenarduzzi
patent: 5313804 (1994-05-01), Kaye
patent: 5372016 (1994-12-01), Rawlings
patent: 5461876 (1995-10-01), Dressler
Doerrler William
Johnson Stanley E.
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