US Patent 7775263 Heat exchanger

The present invention relates to a heat exchanger, which can independently controls the volume of heat exchange medium flowing through tubes of a left heat exchange part and a right heat exchange part to independently control the temperature of a driver's seat and a passenger's seat, thereby realizing a compact structure since a temp door for controlling temperature is omitted from an air-conditioning system for the vehicle, which can reduce an operating force and increase durability since heat exchange medium controlling means are in a rotational structure, and which can minimize a temperature difference between the right and left sides thereof since the heat exchange medium is distributed to the tubes uniformly.