Cascade refrigeration system with modular ammonia chiller units

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United States of America Patent

PATENT NO 9657977
SERIAL NO

15243308

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Abstract

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A cascade refrigeration system includes an upper portion. The upper portion includes at least one modular chiller unit that provides cooling to at least one of a low temperature subsystem having a plurality of low temperature loads, and a medium temperature subsystem having a plurality of medium temperature loads. The modular chiller unit includes a refrigerant circuit, an ammonia refrigerant, an ammonia refrigerant accumulator, and an oil separation system. The refrigerant circuit includes at least a compressor, a condenser, an expansion device, and an evaporator. The ammonia refrigerant is configured for circulation within the refrigerant circuit. The ammonia refrigerant accumulator is configured to receive the ammonia refrigerant from the evaporator. The oil separation system is configured to remove oil from the ammonia refrigerant. The oil separation system includes an oil separator that is configured to remove oil from the ammonia refrigerant flowing from the compressor to the condenser, an oil drain pot that is configured to collect oil from the evaporator, and an oil reservoir that is configured to collect oil from the oil separator and the oil drain pot.

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Patent Owner(s)

Patent OwnerAddress
HILL PHOENIX INC2016 GEES MILL ROAD CONYERS GA 30013

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bittner, John D Bethlehem, US 15 125
Hinde, David K Atlanta, US 14 243
Wilkerson,, Jr Joe T Covington, US 2 9
Zha, Shitong Conyers, US 26 45

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