Electronic evaporator dryer for eliminating odors in vehicle air conditioning systems

An air conditioning system for a vehicle comprising:

• a compressor coupled to an engine of the vehicle;
• an evaporator in flow communication with said compressor;
• a refrigerant flowable through said compressor and said evaporator;
• a blower cooperating with said evaporator, said blower including a blower control and a blower motor having a positive terminal and a negative terminal;
• and,
• a circuit bypassing said blower control and an accessory switch of the vehicle and connecting said positive terminal of said blower motor to a positive terminal of a battery of the vehicle and connecting said negative terminal of said blower motor to ground on a predetermined time schedule when the air conditioning system is turned off after having been operated.

An apparatus for use with an air conditioning system of a vehicle to dry condensate from the heat exchanger of the air conditioning system in order to prevent propagation of fungus and bacteria and resulting odors, said apparatus comprising:

• a logic circuit connected to a battery voltage sensor and a temperature sensor;
• a first relay connected to said logic circuit, to a positive terminal of a blower motor of the air conditioning system and through two connections to a positive terminal of a battery of the vehicle;
• and,
• a second relay connected to said logic circuit, to a negative terminal of said blower motor, and through two connections to ground.

A method of drying condensate from within an vehicle's air conditioning system to thwart the propagation of fungus and bacteria and its attendant odor, the air conditioning system having a blower with a positive terminal and a negative terminal, said method comprising the steps of:

• (a) determining that the engine of the vehicle has been shut off after having been operated;
• (b) connecting the positive terminal of the blower directly to a positive voltage source from the vehicles battery and connecting the negative terminal of the blower directly to ground to operate the blower;
• (c) after a predetermined time, disconnecting at least one of the terminals of the blower that was connected in step (b) to discontinue operation of the blower;
• (d) repeating steps (b) and (c) for a predetermined number of cycles, the cycled operation of the blower drawing condensate from within the air conditioning system to thwart the propagation of fungus and bacteria therein.