Oil return for a direct exchange geothermal heat pump
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United States of America Patent
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Mar 26, 2013
Grant Date -
Nov 5, 2009
app pub date -
May 4, 2009
filing date -
May 2, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A heating/cooling system design enabling one to maintain a superheat level of more than 1 degree F. and up to 10 degrees F., incorporating a specially designed accumulator, optional special oil return means, a specially designed receiver, and, when utilized in a DX geothermal system application, a preferable sub-surface liquid refrigerant transport line insulation design, as well as a design enabling the utilization of at least two compressors to increase heat transfer temperature differentials together with special oil separators.
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