Refrigeration – Processes – Compressing – condensing and evaporating
Patent
1975-04-07
1977-03-01
King, Lloyd L.
Refrigeration
Processes
Compressing, condensing and evaporating
62 2, 62498, 62501, F25B 100, F25B 2700
Patent
active
040095878
ABSTRACT:
A heat pump system including an evaporator with an inlet and an outlet, a condenser with an inlet and an outlet, a boiler with an inlet and an outlet, an expansion valve connecting the condenser outlet to the evaporator inlet, a liquid pump connecting the condenser outlet to the boiler inlet, and a system working fluid in combination with an expansion-compression device defining a chamber therein and including a free-piston slidably carried in the chamber for linear movement therein, and dividing the chamber into a first subchamber of varying size as said free piston moves and a second subchamber of varying size as said free piston moves along with boiler valve means for selectively introducing working fluid from the boiler outlet into the first subchamber; valve means for selectively introducing working fluid from the evaporator outlet into the first subchamber; condenser valve means for selectively introducing working fluid from said first subchamber into the condenser inlet; means for pressurizing the second subchamber to urge said free piston toward said first subchamber; and control means for selectively causing the boiler valve means to introduce working fluid from the boiler into the first subchamber to drive the free piston toward the second subchamber, for causing the evaporator valve means to introduce working fluid from the evaporator into said first subchamber when the pressure in the first subchamber drops below the pressure in the evaporator, and for selectively causing the condenser valve means to connect the first subchamber to the condenser inlet when said free piston moves toward the first subchamber and when the pressure in the first subchamber rises to the pressure in the condenser. The disclosure also contemplates the operation of the system and the specific construction and operation of the boiler valves and condenser valves.
REFERENCES:
patent: 871325 (1907-11-01), Coleman
patent: 1353216 (1920-09-01), Carlson
patent: 2039999 (1936-05-01), Holyfield
patent: 2991632 (1961-07-01), Rogers
patent: 3172270 (1965-03-01), Mirante
patent: 3708996 (1973-01-01), Wurm
patent: 3763663 (1973-10-01), Schlichtig
Robinson, Jr. Glen P.
Shelton Samuel V.
King Lloyd L.
Powell B. J.
Scientific-Atlanta, Inc.
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