Abstract: Motor-fan unit, particularly for the cooling of the circulation water of an automobile vehicle motor, comprising a helicoid fan driven by an electric motor. A centrifugal interior blading draws air through the electric motor to cool it. The motor is fixed in a housing having at least one lateral opening for air entry which is located radially opposite a cavity formed in an arm connecting the housing to a collar which surrounds the helicoid fan. The cavity has a generally U-shaped section with its concavity turned downstream of the flow of air drawn in by the helicoid fan.

Abstract: Motor-fan unit, particularly for the cooling of the circulation water of an automobile vehicle motor, comprising a helicoid fan driven by an electric motor. A centrifugal interior blading draws in the air through the electric motor to cool it and drives this air back into a volute surrounding the axis of the motor-fan unit. The volute opens at the same side as the electric motor in relation to the vanes of the helicoid fan. An electrical resistor, usable for making the motor-fan unit turn at reduced speed, can be placed in the volute or at the outlet of the volute to be cooled by the air stream.