Abstract: A method of operating an air conditioning system includes changing output of the compressor based on a temperature limit of the evaporator. The temperature limit is one of a predetermined fixed temperature limit and a variable temperature limit. The method also includes determining the variable temperature limit by determining a target air outlet temperature for conditioned air in a control space, detecting an actual evaporator temperature, calculating a difference between the target air outlet temperature and the actual evaporator temperature, finding a predetermined first temperature adjustment that correlates to the difference, finding a predetermined second temperature adjustment that correlates to another condition, and calculating the variable temperature limit by adjusting the fixed temperature limit by one of the first and second temperature adjustments.

Abstract: A method of operating an air conditioning system includes changing output of the compressor based on a temperature limit of the evaporator. The temperature limit is one of a predetermined fixed temperature limit and a variable temperature limit. The method also includes determining the variable temperature limit by determining a target air outlet temperature for conditioned air in a control space, detecting an actual evaporator temperature, calculating a difference between the target air outlet temperature and the actual evaporator temperature, finding a predetermined first temperature adjustment that correlates to the difference, finding a predetermined second temperature adjustment that correlates to another condition, and calculating the variable temperature limit by adjusting the fixed temperature limit by one of the first and second temperature adjustments.

Abstract: A spray nozzle or other dispensing opening is configured to deliver an aroma enhancement fluid onto an evaporator core of the HVAC system of an automobile. A fluid reservoir is configured to house the aroma enhancement fluid. Tubing can provide a flow path from the fluid reservoir to the spray nozzle. A pump unit can be located along the flow path to pump fluid from the fluid reservoir to the spray nozzle. A controller intermittently actuates the pump unit, thereby spraying the aroma enhancement fluid onto the evaporator core through the spray nozzles. In an associated method the user can select from one of a plurality of available aroma enhancing fluids. The aroma enhancement fluid can include an antibacterial component, an anti-fungal component, a deodorizer component, a fragrance component, and combinations thereof.