Refrigeration – Processes – Circulating external gas
Patent
1998-09-24
2000-04-25
Wayner, William
Refrigeration
Processes
Circulating external gas
62178, 62282, F25D 1706, F25D 2100
Patent
active
060529989
ABSTRACT:
A method for operating a blower of an vehicle air conditioning (a/c) system after ignition off for purging moisture from an evaporator core includes accumulating a/c system data while the a/c system is operating including a/c on time, duty cycle, ambient temperature and mode of operation. When the ignition switch is turned off terminating operation the a/c system, updated data is saved for use in a look up table. A moisture index is selected from the look up table after ignition off as a function of a/c duty cycle, ambient temperature and mode of operation. The moisture index is a measure of the amount of moisture accumulated on the evaporator core which is a function of the a/c duty cycle, ambient temperature and fresh air or recirculated air mode of operation. The blower operates at a speed and for a duration dictated by the moisture index to purge moisture rather than simply operating for a set period of time regardless of moisture present.
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Barkley John
Dage Gerhard Allan
Ford Motor Company
May Roger L.
McKenzie Frank G.
Wayner William
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