Method for monitoring the refrigerant level in an air conditioner
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United States of America Patent
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Nov 20, 2001
Grant Date -
N/A
app pub date -
Jul 18, 2000
filing date -
Jul 27, 1999
priority date (Note) -
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Abstract
The invention relates to a method for monitoring the refrigerant level in an air conditioner, in particular a motor vehicle air conditioner, with a compressor which subdivides the refrigerant circuit into a high-pressure side and a low-pressure side. The method includes the steps of measuring the pressure and the temperature on the high-pressure side at time intervals, determining an assigned temperature using the measured pressure with the aid of a refrigerant-specific function, and determining a refrigerant undercooling value which can be evaluated as a measure of the refrigerant level by subtracting the measured temperature from the assigned one.
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