A safety management system for mitigation of flammability risk with flammable refrigerants

摘要

#$%^&*AU2014100177A420140327.pdf#####Abstract A refrigeration apparatus safety management system in two forms; each with the purpose of mitigating the potential for a flammable atmosphere in the event of unintended egress of refrigerant. In the first form, the safety management system is reactive, detecting fugitive refrigerant and systematically preventing further egress. The novelty relates to the incorporation of a dedicated liquid refrigerant reservoir enabling a failsafe condition. In the second form, safety management is prophylactic, removing oxygen from a closed refrigerated space thereby mitigating the possibility of an oxidising atmosphere. The novelty relates to the application of purging a refrigerated space of air to preclude the possibility of formation of a flammable atmosphere. Both forms apply an adaptive outcomes approach and may be fitted to a variety of direct expansion refrigeration systems. This approach enables certain refrigeration systems to employ higher charges of flammable refrigerants than prescribed without the inherent risk.1/1 figure 1. existing low pressure check valve sensing switch suction line existing. compressor existing existing condenser evaporator reservoir existing metering device liquid line manual valve n/c solenoid valve control card RIF receiver detection indicator remote HC gas detetor(s) 20 IuV RF transmitter(s) GPO 240 AC