Pre-trip system for a controlled atmosphere system for a refrige

Details Pre-trip system for a controlled atmosphere system for a refrige Pre-trip system for a controlled atmosphere system for a refrige

1994-06-15

1995-08-08

Capossela, Ronald C.

Refrigeration

Processes

Deodorizing, antisepticizing or providing special atmosphere

622281, 426418, F24F 316

Patent

active

054388414

ABSTRACT:
Pre-trip operational methods and procedures for automatically checking predetermined functions and the operating performance of a controlled atmosphere system for a refrigerated container. The system includes an electronic control and electrically controlled components including an air compressor, a filter having a drain valve, a heater, a nonelectric membrane separator and two or more flow control valves for varying the purity and the flow from the membrane separator. Various pressure, temperature and safety control devices are provided in the system. The methods include display tests of the indicator lights and display segments on the controller, tests of the drain valves on the filters and of the flow control valves. Tests of the heater and its control and safety mechanisms are carried out. Automatic tests are conducted of the oxygen sensor and CO.sub.2 sensor including span tests and zero point value tests. Tests of the membrane assembly are conducted to determine if the required purity of nitrogen can be generated from the membrane separator. Pass or fail indications are provided via a display which indicates the test being conducted and the result of the test.

REFERENCES:
patent: 5120329 (1992-06-01), Saurer et al.
patent: 5156009 (1992-10-01), Woodruff
patent: 5355781 (1994-10-01), Liston et al.

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