DRAIN PUMP FOR AIR CONDITIONER

PROBLEM TO BE SOLVED: To prevent an impact noise of water in a pump body and a backflow noise to be produced during the rotation and stoppage of a moving blade from leaking outside to generate noise. SOLUTION: A pump case 3 is made up of a body part 11a having an inner circumferential surface whose diameter is gradually increased, and being opened at the upper end, and an outer case 9 provided with a discharge port part 13 hanging down in a level higher than a pump body 11 and interconnecting an upper part of the body part upwards, and a drainage passage 15 extending over the vertical direction. A motor storage case 5 is formed by way of installing a bootom face plate 5b with a through hole 5c in the central part and a rising partition wall 5h in the inner part respectively, after covering the pump case. A moving blade 25 being integrally formed in a boss part 25a, and provided with a curved blade part 25c hanging down as twisting along the inner circumference of a cylinder part is attached to a turning shaft 23b if an electric motor 23 projecting from the through hole 5c. In addition, a hanging partition wall 7a holding the electric motor between in conjunction with the rising partition wall 5h and a cover case 7 provided with a setting part upwards are attached to a top opening of the motor storage case 5.