Patent ID: 6772598
Filing Date: 2004-08-10
Classification: F25B

Abstract:
A leak detection system to monitor, report and control at least one walk-in refrigeration unit having a flow of refrigerated gas, the leak detection system essentially comprising:a refrigerant leak detection control panel, connected to; at least one remote refrigerant leak sensor within or attached to the at least one walk-in refrigeration unit; an uninterruptable power supply connected to and providing power to said control panel, at least one inside walk-in horn and strobe unit connected to said control panel through an addressable horn control module; at least one outside walk-in horn and strobe unit connected to the control panel through an addressable strobe control module; a horn and strobe power supply with battery backup connected to said at least one inside walk-in horn and strobe unit and said at least one outside walk-in horn and strobe unit; an addressable fire alarm control panel within said control panel connecting to a power supply with battery backup, including a first FACP keypad located in the front of the control panel, and to a second remote FACP keypad; said control panel further connected to the refrigeration compressor equipment room by a data power cable first through a zone expansion module and second, to an addressable relay module, integrating with a refrigeration compressor controller of the walk-in refrigeration unit, to an output module of the walk-in refrigeration unit; said control panel, through a refrigeration compressor controller of the walk-in refrigeration unit, still further connecting to evaporator liquid and suction line solenoid valves controlling the flow of refrigerated gas to the walk-in refrigeration unit in the event a shutdown of said flow of refrigerated gas is warranted.