Patent ID: 6852024
Filing Date: 2005-02-08
Classification: B60H

Abstract:
1. An air passage switching device comprising: a case for defining an air passage through which air flows, the case having a first opening portion and a plurality of second opening portions through which air in the air passage flows to an outside of the case; a first door disposed in the case for opening and closing the first opening portion and a communication path that is provided within the case upstream of the second opening portions, wherein the first door is a rotary door including a rotation shaft, an outer peripheral door surface separated from a center axial line of the rotation shaft to a radial outside by a predetermined distance and two side plates connected to the rotation shaft and end portions of the outer peripheral surface in an axial direction of the rotation shaft; a second door disposed downstream of the first door and the communication path, for opening and closing the second opening portions, the second door being operatively linked with the first door; and an air distributing guide member provided in the second door to be moved integrally with the second door, wherein: the rotary door is disposed to be rotatable between a first position where the first opening portion is closed by the rotary door, and a second position where the communication path is closed by the outer peripheral door surface of the rotary door; when the rotary door is moved to a predetermined position between the first position and the second position, both of the first opening portion and the communication path are opened, and the second door opens at least one of the second opening portions; and the air distributing guide member is positioned on the second door, opposite to the outer peripheral door surface of the rotary door, to be separated from the outer peripheral door surface by a predetermined distance (L