Intake blower, notably for a motor vehicle heating, ventilation and/or air conditioning device, the blower comprising: - a turbine configured to be driven in rotation about an axis and having at least a first part termed "upper part" and a second part termed "lower part", - a blower housing surrounding the turbine and having a blower housing outlet extending along an axis, and - an air intake housing comprising: - at least two separate air inlets (24, 26), the air inlet corresponding to an opening for the passage of a recirculated-air airflow, the air inlet corresponding to an opening for the passage of an exterior-air airflow, and - air guiding members (27, 28, 30) configured to direct at least one airflow intended to be admitted into the air intake housing, characterized in that the air guiding members comprise at least three coaxial flaps (27, 28, 30), these being a central flap and two lateral flaps (28, 30) arranged on either side of the central flap, said coaxial flaps (27, 28, 30) being arranged between said two separate air inlets (24, 26) of the air intake housing, so as to be able to move about a single pivot axle, said coaxial flaps (27, 28, 30) each being arranged with the ability to move between a first extreme position, in which said flap (27, 28, 30) closes off one air inlet, and a second extreme position, in which said flap (27, 28, 30) closes off the other air inlet, the pivot axle of the coaxial flaps (27, 28, 30) being parallel to the axis of extension of the blower housing outlet, the blower further comprising a dividing partition extending at least in part into the turbine, so as to separate a first airflow intended to pass through the first axial part of the turbine and a second airflow intended to pass through the second axial part of the turbine, the dividing partition being arranged in such a way as to separate the airflows into a central flow circulating inside the dividing partition and a peripheral flow circulating around the dividing partition, the blower further comprising an additional dividing partition arranged in the air intake housing in such a way as to at least partially surround an end region of the central flap in one extreme position, such that the exterior-air airflow can flow within the blower through the exterior-air inlet to be guided towards the outside of the dividing partition, and the recirculated-air airflow can also flow into the blower through the central flap which guides the recirculated-air airflow towards the inside of the additional dividing partition and then of the dividing partition. - a turbine configured to be driven in rotation about an axis and having at least a first part termed "upper part" and a second part termed "lower part", - a blower housing surrounding the turbine and having a blower housing outlet extending along an axis, and - an air intake housing comprising: - at least two separate air inlets (24, 26), the air inlet corresponding to an opening for the passage of a recirculated-air airflow, the air inlet corresponding to an opening for the passage of an exterior-air airflow, and - air guiding members (27, 28, 30) configured to direct at least one airflow intended to be admitted into the air intake housing, the blower further comprising a dividing partition extending at least in part into the turbine, so as to separate a first airflow intended to pass through the first axial part of the turbine and a second airflow intended to pass through the second axial part of the turbine, the dividing partition being arranged in such a way as to separate the airflows into a central flow circulating inside the dividing partition and a peripheral flow circulating around the dividing partition, the blower further comprising an additional dividing partition arranged in the air intake housing in such a way as to at least partially surround an end region of the central flap in one extreme position, such that the exterior-air airflow can flow within the blower through the exterior-air inlet to be guided towards the outside of the dividing partition, and the recirculated-air airflow can also flow into the blower through the central flap which guides the recirculated-air airflow towards the inside of the additional dividing partition and then of the dividing partition.