DRAINING STRUCTURE OF AUTOMOTIVE VEHICLES AIR CONDITIONING SYSTEM

摘要

A drain structure of an air conditioning system for a vehicle is provided to block a drain path if a negative pressure is generated at the drain path, to prevent a backflow of water at the drain path and an overflow due to the negative pressure, thereby preventing damage and a failure of a blower. An overflow(42) is formed at an air conditioning case(10) to discharge condensate falling down from an evaporator(30). A drain path(44) connects a blower chamber(12) with the overflow to discharge water introduced into a blower(20) to the discharge port. An anti-backflow valve(50) blocks the drain path by a negative pressure of the drain path generated when the blower of the blower chamber is operated, to prevent a backflow of water into the drain path.