DX system with filtered suction line, low superheat, and oil provisions
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United States of America Patent
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Dec 27, 2011
Grant Date -
May 14, 2009
app pub date -
Nov 7, 2008
filing date -
Nov 9, 2007
priority date (Note) -
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Abstract
A heating/cooling system has improved operating efficiencies due to low superheat provisions and a specially configured compressor oil return. For certain systems, such as direct exchange geothermal heating/cooling applications having sub-surface heat exchanges extending at least 100 feet below the surface and using R-410A refrigerant, a specific compressor oil may be used to further improve efficiency.
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