Refrigeration – Processes – Compressing – condensing and evaporating
Patent
1977-03-09
1978-06-27
King, Lloyd L.
Refrigeration
Processes
Compressing, condensing and evaporating
62174, 62509, F25B 100, F25B 4100, F25B 3904
Patent
active
040967069
ABSTRACT:
A compressor, condenser, pressure control valve, condensed liquid receiver, expansion valve and evaporator are arranged in circuit to provide a refrigeration system. The pressure control valve and condensed liquid receiver are bypassed by a pump tank and a pump in circuit between the output of the condenser and the expansion valve. A float switch in the pump tank provides an actuating signal at a predetermined level for condensed liquid in the pump tank, and the actuating signal is coupled to the pump. The pump, when actuated, draws condensed liquid from the pump tank at a free condensation pressure dependent upon ambient temperature at the condenser, and provides high pressure condensed liquid to the expansion valve. An inlet/outlet line between the condensed liquid receiver and the expansion valve allows high pressure condensed liquid which is not passed by the expansion valve to be accumulated in the condensed liquid receiver. The method includes compressing a fluid in a gaseous phase and condensing the fluid to a liquid phase at a pressure corresponding to the ambient temperature of condensation. Collecting the condensed liquid phase fluid is followed by sensing the level of the collected condensed fluid and thereafter pumping the collected condensed fluid to a high pressure when the collected condensed fluid reaches a predetermined level. High pressure condensed fluid is expanded and evaporated in the refrigeration system, and/or accumulated as high pressure condensed fluid.
REFERENCES:
patent: 2871673 (1959-02-01), Richards et al.
patent: 3164973 (1965-01-01), Watkins
patent: 3248895 (1966-05-01), Mauer
patent: 3315484 (1967-04-01), Ross
patent: 3353367 (1967-11-01), Garland et al.
patent: 3844131 (1974-10-01), Gianni et al.
patent: 3848425 (1974-11-01), Watkins
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