A method of determining current through a compressor suction valve in a vehicle air conditioning system

A method of determining current through a compressor suction valve in a vehicle air conditioning system

An air conditioning system comprises an evaporator fan 410 and a compressor suction valve 41. A method of determining current through the compressor suction valve comprises determining the speed of the evaporator fan and determining the current through the suction valve based upon the determined spe...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Mike Rowland, Jim C Rollinson, Hugh Hamilton, Stephen Michael White, John Eric Rollinger
Format: Patent
Sprache:eng
Schlagworte:
ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING,OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODSSPACES OF VEHICLES
PERFORMING OPERATIONS
TRANSPORTING
VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:An air conditioning system comprises an evaporator fan 410 and a compressor suction valve 41. A method of determining current through the compressor suction valve comprises determining the speed of the evaporator fan and determining the current through the suction valve based upon the determined speed of the evaporator fan. A vehicle air conditioning system having a compressor, compressor suction valve, evaporator having at least one evaporator coil and an evaporator fan, and a controller is also claimed in which the system is configured to set the current through the compressor suction valve based on the speed of the evaporator fan. Determining the current through the suction valve ideally comprises determining a relationship between current through the suction valve and at least one of: a modified air temperature (i.e. ambient temperature modified based on a speed of the vehicle); and a target temperature of the evaporator fan. Determining the current through the suction valve ideally also comprises calculating a current function, which is a function of the temperature of air entering the evaporator fan, the target temperature and the speed of the evaporator fan.