Denso Corporation

Hiroaki Shiraishi

Toshifumi Kamiya

Makoto Umebayahi

A centrifugal multiblade blower includes: an electric motor; and an impeller blowing off air outward in a radial direction by being rotated by the electric motor. A main plate of the impeller has an uneven part on one surface adjacent to the electric motor in a thickness direction of the main plate. The one surface is in contact with air passing through inside of the electric motor. A surface shape of the uneven part is formed in manner that, among a whole surface of the uneven part, a total surface area of a surface facing inward in a radial direction of the motor is larger than an imaginary smooth surface on which the surface shape of the uneven part is defined to be a smooth surface without the uneven part.

Centrifugal multiblade blower

In a vehicle air conditioner, an electrical heating member is disposed integrally with a heating heat exchanger including a core portion and upper and lower tanks. An electrical connection portion of the electrical heating member is disposed on a downstream air side of the lower tank of the heating heat exchanger. Therefore, the lower tank of the heating heat exchanger can restrict water from being covered onto the electrical connection portion of the electrical heating member. Thus, an electrical short circuit in the electrical connection portion is prevented, while air flow resistance is restricted from being increased.

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Kariya, Japan

Hiroaki Shiraishi