Refrigeration – Automatic control – Refrigeration producer
Patent
1984-04-06
1985-10-29
Tanner, Harry
Refrigeration
Automatic control
Refrigeration producer
62209, F25D 1702
Patent
active
045494037
ABSTRACT:
A method and control system are disclosed for operating a refrigeration system to protect an evaporator in a refrigeration system against freezeups of a heat transfer fluid cooled in the evaporator by operation of the refrigeration system. A first signal indicative of the temperature of the heat transfer fluid in the evaporator and a second signal indicative of the temperature of the heat transfer fluid leaving the evaporator are provided to a microcomputer system which processes the first and second signals to determine when the temperature of the heat transfer fluid in the evaporator falls below the temperature of the heat transfer fluid leaving the evaporator by a selected amount. The microcomputer system generates an alarm signal to shut down operation of the refrigeration system if the microcomputer system determines that the temperature of the heat transfer fluid in the evaporator is less than the temperature of the heat transfer fluid leaving the evaporator by the selected amount.
REFERENCES:
patent: 1954455 (1934-04-01), Morse et al.
patent: 2224629 (1940-12-01), Borse et al.
patent: 2666298 (1954-01-01), Jones
patent: 2968167 (1961-01-01), Raney
Lord Richard G.
Nieva Kenneth J.
Carrier Corporation
Kelly Robert H.
Tanner Harry
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