Sub-surface and optionally accessible direct expansion refrigerant flow regulating device
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United States of America Patent
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Jun 22, 2004
Issued Date -
N/A
app pub date -
Dec 31, 2002
filing date -
Dec 31, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A sub-surface direct expansion geothermal heat exchange unit, which can be placed in sub-surface ground and/or water, consisting of at least one smaller interior diameter refrigerant liquid/fluid transport line with an optional vertically oriented U bend at the bottom, operatively connected to at least one larger interior diameter refrigerant liquid/fluid transport line, with at least one refrigerant flow metering device installed at either an accessible location in the liquid/fluid line or at the sub-surface point where the liquid/fluid line connects with the vapor/fluid line, for use when the system is operating in the heating mode, together with a refrigerant flow metering device by-pass means so as to enable additional refrigerant fluid flow around the refrigerant metering device when the system is operating in the cooling mode.
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