Abstract: A commercial refrigeration network including refrigeration system units constructed and arranged for placement in strategic proximity to corresponding product cooling zones within the shopping arena of a food store, each refrigeration unit having a condensing unit rack configured to accommodate the maximum refrigeration loads of its associated zone with an optimum floor space footprint in the shopping arena, and the condensing unit rack including a plurality of multiplexed compressors, condenser and associated high side and low side refrigerant delivery and suction conduits operatively connected to evaporators for cooling the corresponding zone, and the network also including another cooling source remote from said modular refrigeration units and constructed and arranged for circulating a fluid coolant in heat exchange relationship with the condenser to obtain optimum condensing and efficiency of said evaporators in cooling the corresponding zone.

Abstract: A flow-through surge receiver for a refrigeration system having compressor, condenser and evaporator means, in which a surge-type receiver forms a reservoir for liquid refrigerant and has a flow-through conduit receiving refrigerant from the condenser means and an outlet for passing such refrigerant directly to the evaporator means in by-pass relation with the receiver reservoir, and a passageway for establishing fluid communication between said conduit and reservoir below the normal liquid refrigerant level in the reservoir.