Refrigeration – Automatic control – Responsive to vehicle body motion or traction
Patent
1992-02-27
1993-02-16
Tanner, Harry B.
Refrigeration
Automatic control
Responsive to vehicle body motion or traction
62160, 622284, 62243, 1231794, F25B 100
Patent
active
051860155
ABSTRACT:
A transport refrigeration unit, and method of operating same, with the unit being associated with a vehicle having a drive engine and a cargo space to be conditioned to a predetermined set point temperature. The transport refrigeration unit includes a refrigerant compressor driven directly, or indirectly, by the vehicle engine. Sensors and control determine when the engine may be safely started and stopped under control of the transport refrigeration unit. A comparison between cargo temperature and set point temperature determines when a refrigeration cycle is required to maintain the set point temperature, and when the cargo space temperature is satisfied. The engine is started, when off, when the engine may be safely started and the cargo space requires a refrigeration cycle to maintain the set point temperature. The engine is stopped, when running, when the engine may be safely stopped and the cargo space is satisfied.
REFERENCES:
patent: 4333316 (1982-06-01), Stamp, Jr. et al.
patent: 4494497 (1985-01-01), Uchida et al.
patent: 4819441 (1989-04-01), Hanson
patent: 5024186 (1991-06-01), Long et al.
patent: 5029449 (1991-07-01), Wilkinson
Hanson Jay L.
Roehrich Roland L.
Lackey D. R.
Tanner Harry B.
Thermo King Corporation
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