Patent ID: 6293116
Filing Date: 2001-09-25
Classification: B60H,F25B

Abstract:
A method of operation for a vehicle climate control system including a controlled capacity refrigerant compressor and an evaporator which receives chilled refrigerant for cooling and de-humidifying air passing through the evaporator prior to being discharged into a passenger compartment of the vehicle, comprising the steps of:measuring an evaporator outlet parameter indicative of a dew point temperature of the air discharged into the passenger compartment;determining a desired dew point temperature of the air based on a desired air temperature of the passenger compartment and a desired relative humidity of the passenger compartment;determining a target value of the evaporator outlet parameter based on the desired dew point temperature; andcontrolling the compressor capacity to bring the measured evaporator outlet parameter into agreement with the target evaporator outlet parameter.