Patent ID: 6749008
Filing Date: 2004-06-15
Classification: B60H

Abstract:
A vehicle air-conditioning system, comprising:a casing defining air passages for guiding air to a vehicle compartment and defining a face opening, wherein the face opening is disposed in an upper part of the casing; a heating heat exchanger disposed inside the casing, wherein the heating heat exchanger heats the air; a face passage defined within the casing and located above the heating heat exchanger for guiding temperature-conditioned air to the face opening; a foot passage defined within the casing and located above the heating heat exchanger, wherein the foot passage extends form a rear surface of the casing toward the face passage, is situated to extend parallel to a width dimension of a vehicle, and has a foot opening disposed in a region of the foot passage proximate to the face passage; and a foot door disposed inside the face passage to rotably open and close the foot opening, wherein the foot door is a butterfly door and further comprises: a rotating shaft; and a first plate door and a second plate door integrally bonded and oppositely situated on the rotating shaft; wherein the air, being temperature-conditioned by passage through the heating heat exchanger, flows from the foot opening into the foot passage when the foot opening is opened by the foot door and blows out of right and left side ducts directed parallel to the width dimension of the vehicle; an air mix door is approximately vertically disposed between the heating heat exchanger and the butterfly door within the casing, a proportion of warm air passing through the heating heat exchanger and cool air bypassing the heating heat exchanger is adjusted by the air mix door to control a temperature of air blowing into the vehicle compartment, the first plate door separates air in a warm air region from air in a cool air region when the butterfly door is set to a halfway open position, and directs the air in the warm air region toward the foot passage and the air in the cool air region toward the face passage, and an auxiliary passage is formed close to a tip of the second plate door such that the air in the warm air region being directed to the foot passage is divided and directed toward the face passage.