Vehicle air conditioner

A vehicle air conditioner comprising:

• an air conditioning casing having therein an air passage through which air flows to be blown into a vehicle compartment, the air conditioning casing including a first casing member and a second casing member and being configured such that at least the first casing member and the second casing member are combined with each other;
• and
• a heat exchanger disposed inside the air conditioning casing to adjust a condition of air that is to be blown into the vehicle compartment, wherein
• the air conditioning casing includes:
• a guide opening portion communicating with the air passage such that water inside the air conditioning casing flows into the guide opening portion;
• a first space portion communicating with the guide opening portion such that the water falling from the guide opening portion due to gravity flows down in the first space portion;
• a drainage port communicating with the first space portion to discharge the water, which has flowed down from the first space portion, to an exterior of the air conditioning casing;
• a second space portion located adjacent to the first space portion;
• a partition wall separating between the first space portion and the second space portion such that the water falling in the first space portion is prevented from entering the second space portion;
• a bottom wall portion provided under the second space portion and defining the second space portion;
• a prevention wall extending upward from the bottom wall portion in the second space portion;
• and
• a fixation portion in which the first casing member and the second casing member are fixed to each other, and
• an upper end of the prevention wall is higher than a position of the fixation portion.