Case assembling structure of blower unit

A blower unit for a vehicle air conditioner, said blower unit comprising:

• a case made of resin and having an air introduction port through which air is introduced therein;
• a door disposed in the case, for opening and closing said air introduction port;
• a motor for driving said door;
• a fan disposed in the case, for blowing air introduced from said air introduction port;
• and
• a duct for forming an air passage through which air blown by said fan flows, wherein:
• said case includes
• a first case portion having said air introduction port and accommodating said door,
• a second case portion for accommodating said fan,
• a bell-mouth portion having an air leading port through which air from said first case portion is introduced to said fan, and
• an attachment boss portion protruding from an outer wall surface of said first case portion, onto which said motor is attached;
• said duct is divided into a first member extending from said bell-mouth portion to cover said attachment boss portion when said first case portion and said bell-mouth portion are assembled, and a second member integrated with said second case portion;
• and
• said first member and said second member are detachably assembled to form said duct.