Method and apparatus for transport refrigeration system control

Details Method and apparatus for transport refrigeration system control Method and apparatus for transport refrigeration system control

1980-04-29

1982-04-20

Makay, Albert J.

Refrigeration

Automatic control

Refrigeration producer

62228, 165 26, 236 1E, F25B 4100, F25B 2900

Patent

active

043252249

ABSTRACT:
A transport refrigeration system having the capability of either heating or cooling at high or low speed and with the compressor loaded or unloaded is controlled by a temperature control system including a heat relay 1K and a speed relay 2K, and has an auxiliary control relay CR which is operative to maintain the compressor speed at a low speed in the temperature band 48 closely above and below the setpoint temperature, and will further maintain the low speed of the compressor for a predetermined time as the temperature rises above or below the narrow temperature band through time delay means 46 which, if uninterrupted in operation for the predetermined time period will drop out the control relay so the system can resume higher speed operation.

REFERENCES:
patent: 3500898 (1970-03-01), Gerhart, Jr. et al.
patent: 4228846 (1980-10-01), Smorol

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