Patent ID: 6037567
Filing Date: 2000-03-14
Classification: B60H

Abstract:
A vehicle air-conditioning system comprising:a case-defining a ventilation flue;a heat exchanger, disposed inside the case, for heating air to be blown into a passenger compartment with warm water from a vehicle engine cooling source;a warm water valve for controlling a flow of warm water from the vehicle engine cooling source to the heat exchanger;a blower for blowing air through the flue, wherein the heat exchanger has warm water tubes through which the warm water flows, radiating fins joined to the warm water tubes, and electric heating devices built into the heat exchanger to release heat to the air to be blown into a passenger compartment by way of the radiating fins; anda control unit for turning on the electric heating devices, for stopping the blower, and for opening the warm water valve so that heat from the electric heating devices is released through the radiating fins to warm water inside the warm water tubes when a predetermined heating operation region is reached and the temperature of the warm water is lower than a set temperature.