Vehicle air conditioning circuit using a refrigerant fluid in the supercritical state
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United States of America Patent
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Jan 20, 2004
Grant Date -
Jun 14, 2001
app pub date -
May 26, 1999
filing date -
May 28, 1998
priority date (Note) -
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Abstract
Refrigerant fluid such as CO.sub.2, compressed to the supercritical pressure by a compressor, is delivered selectively through a three-way valve, either into a branch of the circuit containing a cooler, an expansion device and an evaporator for cooling the cabin of a vehicle, or into a branch containing another expansion device and a heat exchanger for the purpose of heating the cabin.
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