초록 ▼

A commercial refrigeration system has a control system which distributes intelligence to increase granularity of the control and simplify wiring, assembly and installation. Compressors of the refrigeration system each have a bus compatible compressor safety and control module including a processor a

A commercial refrigeration system has a control system which distributes intelligence to increase granularity of the control and simplify wiring, assembly and installation. Compressors of the refrigeration system each have a bus compatible compressor safety and control module including a processor and sensors. All control and safety modules communicate over a single power and communications line with the controller, providing digital transmissions to the controller of measurements taken by the sensors. The information provided may include that the compressor is outside of a specific safety parameter, so that the controller knows not only that a safety parameter has been traversed, but exactly which one. The control and safety modules are capable of executing commands from the controller to cycle the compressors. The control and safety modules preferably contain sufficient intelligence to continue system operation upon failure of the controller. A compressor is also disclosed which has an intelligent control and safety module. The compressor also houses control and safety devices within a hermetically or semi-hermetically sealed shell.

대표청구항 ▼

[ What is claimed is:] [1.]1. A commercial refrigeration system for use in a food store comprising:an evaporator constructed and arranged for cooling food;a compressor in fluid communication with the evaporator for drawing refrigerant away from the evaporator;a condenser in fluid communication with

[ What is claimed is:] [1.]1. A commercial refrigeration system for use in a food store comprising:an evaporator constructed and arranged for cooling food;a compressor in fluid communication with the evaporator for drawing refrigerant away from the evaporator;a condenser in fluid communication with the compressor for receiving refrigerant from the compressor, the condenser being constructed and arranged for removing heat from the refrigerant;an expansion valve in fluid communication with the condenser for receiving refrigerant from the condenser, the expansion valve being constructed and arranged for delivering refrigerant into the evaporator;a controller for controlling the compressor;a compressor operating unit associated with the compressor, the operating unit being constructed and arranged for executing commands from the controller to affect the operation of the compressor and for monitoring at least one operating parameter of the compressor and determining whether the operating parameter is within specification;a low voltage power and communication line extending from the controller to the compressor operating unit and providing electrical power for the operating unit;wherein the controller and compressor operating unit are constructed and arranged for digital communication over the low voltage power and communication line such that no separate power line for the operating unit must be wired upon installation of the system.