Zero Zone, Inc.

Steve Esslinger

Erik B Haffner

A refrigeration system includes a mass of refrigerant, a reservoir containing a first portion of the mass of refrigerant, and a condenser containing a second portion of the mass of refrigerant. A first sensor is positioned to measure a first parameter of the reservoir and output a first signal indicative of the first parameter. A second sensor is positioned to measure a second parameter of the condenser and output a second signal indicative of the second parameter. A processor receives the first signal and the second signal to calculate a weight of missing refrigerant.

Refrigerant tracking/leak detection system and method

A refrigeration system includes a compressor operable to produce a flow of compressed refrigerant. The refrigeration system includes a flow splitter positioned to split the flow of compressed refrigerant into a first flow that flows along a first flow path and a second flow that flows along a second flow path. An expansion device is positioned in the second flow path and is operable to reduce the temperature of the second flow. A heat exchanger has a first side that receives the first flow and a second side that receives the second flow such that the second flow cools the first flow.

Refrigeration system including a side-load sub-cooler

A refrigeration system includes a heat exchanger that is operable to cool a flow of compressed refrigerant and a first sensor coupled to the heat exchanger and operable to generate a first signal indicative of a heat exchanger liquid level. A reservoir is in fluid communication with the heat exchanger to receive the flow of cooled compressed refrigerant and a second sensor is coupled to the reservoir and is operable to generate a second signal indicative of a reservoir liquid level. A processor is operable to calculate a first weight of liquid within the heat exchanger in response to the first signal, and to calculate a second weight of liquid within the reservoir in response to the second signal.

A refrigeration system includes a compressor having a compressor housing and operable to compress a flow of refrigerant. A pump is operable to provide a flow of oil to the compressor. A portion of the oil mixes with the flow of refrigerant and the remainder of the oil flows into the compressor housing. A valve is movable between an open position and a closed position. When in the closed position, the valve is operable to inhibit the addition of oil above a predetermined level within the housing.

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Oak Grove, MN, United States of America

Steve Esslinger