Charge Tolerant Microchannel Heat Exchanger
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United States of America Patent
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Issued Date -
Jul 9, 2015
app pub date -
Dec 19, 2014
filing date -
Jan 7, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A microchannel heat exchanger has an upper portion connected in fluid communication with an undivided header, and a lower portion connected in fluid communication with the undivided header at a location that is vertically lower on the undivided header than the upper portion. Under normal steady state operating conditions, the heat exchanger may condense a first amount of liquid phase refrigerant, wherein the first volume of liquid phase refrigerant substantially fills the lower portion, and wherein substantially none of the refrigerant is condensed into liquid phase refrigerant in the lower portion, and under abnormal steady state operating conditions, the heat exchanger may condense a second amount of liquid phase refrigerant in the upper portion, wherein an additional amount of the second amount of liquid phase refrigerant in excess of the first amount of liquid phase refrigerant is accommodated in the undivided header as opposed to further filling the lower portion.
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