Refrigeration – Automatic control – Of external fluid or means
Patent
1997-09-11
1999-02-23
Tanner, Harry B.
Refrigeration
Automatic control
Of external fluid or means
62129, 622284, 62184, F25B 4902
Patent
active
058732578
ABSTRACT:
A method of preventing compressor surge in an air conditioning system comprises: 1) determining the refrigerant flow rate at the compressor; 2) determining the input pressure and output pressure at the compressor; 3) determining the pressure ratio (output pressure/input pressure) at the compressor; 4) defining a surge limit based upon the pressure ratio and the refrigerant flow rate; 5) processing system operational inputs including motor speeds and air conditioning pressures; and 6) sending control signals to the air conditioning system to control the refrigerant flow rate and the pressure ratio in a manner to prevent compressor operation at the defined surge limit and to maximize compressor efficiency during transitional periods. An air conditioning system is also provided, as well as an article of manufacture for use with the system for preventing compressor surge.
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patent: 4608833 (1986-09-01), Kountz
patent: 5335507 (1994-08-01), Powell
patent: 5396779 (1995-03-01), Voss
Smart Power Systems, Inc.
Tanner Harry B.
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