Air-conditioning system operated with CO2
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United States of America Patent
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-
Apr 8, 2003
Issued Date -
N/A
app pub date -
Aug 5, 2002
filing date -
Jul 20, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
An air-conditioning system operated with CO.sub.2 for a vehicle has a high-pressure section that is connected to the output of a compressor and includes a gas cooler, a low-pressure section that is connected to the suction side of the compressor and includes an evaporator, and an expansion member connecting the high-pressure section and the low-pressure section. The expansion member has a fixed restrictor with a throttle opening of predetermined length and diameter connected between an inlet from the high-pressure section and an outlet to the low-pressure section whereby under all operating conditions of the system, a pressure of refrigerant in the high-pressure section of the system is limited to values of less than 14 MPa. The restrictor can be connected in parallel with a pressure limiting valve and can include two or more different throttle openings that can be selectively connected for refrigerant flow.
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Family
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