Automotive air conditioning unit

摘要

An air conditioning unit is provided comprising a casing including an air flow passage, an evaporator and a heater arranged in the air flow passage, and an air flow control door for controlling an air amount flowing in a heater-passing passage. A water guide groove is provided at a bottom surface of the casing with a slanted bottom. A triangular projection is formed on the bottom surface of the casing, the triangular projection being oriented so that one apex of the projection is directed toward the front wall of the casing.