F - Mech Eng,Light,Heat,Weapons – 25 – B
Patent
F - Mech Eng,Light,Heat,Weapons
25
B
F25B 29/00 (2006.01) F25B 6/00 (2006.01) F25B 47/02 (2006.01) F25B 49/02 (2006.01) F25B 5/02 (2006.01)
Patent
CA 2232551
A refrigeration system (10) with a heat reclaim (11,11') is comprised of at least one compressor (12, 12') for compressing hot refrigerant low pressure gas from at least one evaporator (29) to elevate the gas pressure to an operating high pressure level. A remote condensor (19) is connected to the compressors (12, 12') through a directional controlled valve (13) whereby to control the high pressure refrigerant gas to produce a cooled operating liquid refrigerant for feeding at least one evaporator (29). At least one heat reclaim coil (11, 11') is connected to the directional controlled valve (13) for cooling the high pressure gas from the compressor (12, 12') to recover a substantial portion of the heat from the high pressure gas . A controller device (20) is connected to an outlet (17) of the heat reclaim coil to sense the pressure of the refrigerant gas at the outlet and to control a valve network (21) to section the remote condensor coil (25) or bypass the remote condensor (19). The refrigerant gas being fed to the remote condensor (19) from the outlet of the heat reclaim coil passes through the remote condensor or sections thereof or bypasses the remote condensor depending on the state of the valve network (21) controlled by the controller device (20). The valve network (21) is actuated dependent on the pressure at the outlet (17) of the heat reclaim coil (11') whereby refrigerant gas pressure at that outlet is controlled to prevent excessive pressure drop by the remote condensor which can shut down the refrigeration system (10).
Dube Serge
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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