Transport refrigeration system control
Patent 4419866 Issued on December 13, 1983. Estimated Expiration Date: 
June 9, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 9, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1981859 2850001 2887853 3499297 3551686 3691393 3926167 Method and apparatus for transport refrigeration system control Patent #: 4325224 InventorAssigneeApplicationNo. 06/386500 filed on 06/09/1982US Classes:62/228.4, By variable speed motor or pulley type mechanism123/198D, Safety devices165/253, Temperature sensor controlling temperature62/126, Operatively correlated with automatic control62/158, Time delay of condition sensing or control operation62/229, By external cooled gas62/323.1WITH INTERNAL-COMBUSTION ENGINEExaminersPrimary: Makay, Albert J.Assistant: Tanner, Harry B. Attorney, Agent or FirmInternational ClassesB60H 1/00 (20060101)G05D 23/20 (20060101) F25D 29/00 (20060101) F25B 13/00 (20060101) F25B 49/02 (20060101) F25B 27/00 (20060101) AbstractA transport refrigeration unit powered by a two speed prime mover and having the capability of providing at least four modes of operation is controlled by an arrangement as shown in FIG. 2 which provides for operation in either a continuous cycle in which the prime mover runs continuously to provide the modes shown in FIG. 3 or, alternatively, operates in a start-stop cycle to provide the modes of operation shown in FIG. 4. The control in both of the cycles of operation provide for delays in the change of speed from low to high upon certain departures in temperature from one temperature band to another band which would normally call for high speed operation.Field of SearchCompressor or its drive controlledFor ice or ice cream maker By refrigerant pressure By variable speed motor or pulley type mechanism By variable compressor output, e.g., unloading, staging, etc. By external cooled gas Compressor or its drive controlled By conducted evaporator temperature By condition of power source Diverse function refrigeration elements controlled by single sensor WITH INTERNAL-COMBUSTION ENGINE For plural compressor cylinders Time delay of condition sensing or control operation | |
