Patent ID: 9140263
Filing Date: 2015-09-22
Classification: F04D

Abstract:
1. An advection fan comprising: a housing including a metal housing base and a closure member, with a lateral wall arranged between the metal housing base and the closure member and including an air inlet and an air outlet, with a horizontal air passage defined between the metal housing base and the closure member, with the metal housing base including an engagement section; a stator including a shaft seat and a coil unit, with the shaft seat attached to the engagement section, with the shaft seat including a shaft coupling portion and a bottom wall extending radially outward of the shaft coupling portion to an outer rim extending axially from the bottom wall and terminating in a face facing the closure member, with the face of the outer rim defining a shaft seat reference face, with the shaft coupling portion, the bottom wall, and the outer rim defining a compartment, with the coil unit embedded in the compartment, with the coil unit including a substrate and at least one coil formed on a surface of the substrate, with the substrate intermediate the at least one coil and the bottom wall, with the at least one coil of the coil unit having a top face flush with or below the shaft seat reference face; and an impeller rotatably coupled to the shaft coupling portion of the shaft seat of the stator, with a gap formed between the impeller and the coil unit of the stator.