F - Mech Eng,Light,Heat,Weapons – 25 – B
Patent
F - Mech Eng,Light,Heat,Weapons
25
B
341/28
F25B 49/00 (2006.01) B60H 1/00 (2006.01) B60H 1/32 (2006.01) F25B 13/00 (2006.01) F25B 27/00 (2006.01) F25B 29/00 (2006.01) F25B 49/02 (2006.01) F25D 29/00 (2006.01) G05D 23/20 (2006.01) F25B 47/02 (2006.01)
Patent
CA 1152185
18 48,996 ABSTRACT OF THE DISCLOSURE 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 con- trolled by a temperature control system including a heat relay 1K and a speed relay 2K, and has an auxiliary con- trol relay CR which is operative to maintain the compres- sor speed at a low speed in the temperature band 48 close- ly 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.
375905
Oldham And Company
Thermo King Corporation
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