Patent ID: 7682233

Claim:
A blower for air conditioner of automotive vehicles comprising scroll case formed with upper/lower suction openings at the upper/lower surfaces and a discharge opening at one side; a double suction type centrifugal fan mounted rotatably at the scroll case, and having the upper/lower blowing wheels integrated with a hub plate in the opposite direction, to which a motor is connected; an intake duct with inside/outside air suction openings and an intake door for controlling the opening degree of the inside/outside suction openings, and forming an upper air passage and a side air passage for distributing the air sucked through the inside/outside air suction openings toward the upper/lower suction opening, a water block wall formed around the motor in the bottom of the intake duct to block the inflow of water or foreign substance toward the motor, and a drain port formed at one side of the bottom in the intake duct to discharge the water concentrated in the bottom of the intake duct toward the air conditioning case: wherein, a ratio of a cross-sectional area S 1 of the upper suction opening versus a cross-sectional area S 2 +S 3 of the side air passage is 6:4˜8:2 and a ratio of a height H 1 of the upper blowing wheel versus a height H 2 of the lower blowing wheel is 6:4˜8:2.