초록 ▼

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 hea

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.

대표청구항 ▼

In a ground source heat pump system having a refrigerant compressor with high torque starting characteristics, a closed loop refrigerant circuit including a reversing valve, an indoor coil and an outdoor coil the improvement comprising a divided outdoor coil having at least two parallel flow section

In a ground source heat pump system having a refrigerant compressor with high torque starting characteristics, a closed loop refrigerant circuit including a reversing valve, an indoor coil and an outdoor coil the improvement comprising a divided outdoor coil having at least two parallel flow sections and including a head pressure control valve operatively controlling flow of the refrigerant, in the cooling mode, to a selected one of said sections, said control valve being normally closed preventing flow of refrigerant to said one section until such time as the refrigerant reaches a predetermined pressure and first check valve means in parallel with said head pressure control valve means permitting free flow of refrigerant in the opposite direction during operation in the heating mode.