Abstract: A blower device for a heating, ventilation and air conditioning system, including: a blower housing defining an internal volume with an inlet and an outlet; a blower wheel with blower blades, arranged within the internal volume of the blower housing; a motor configured to rotate the blower wheel in a first direction around a central axis; a preswirler arranged within the inlet upstream of the blower wheel and including a plurality of vanes extending towards the blower wheel. Each vane of the plurality of vanes includes a first section and a second section, both extending along the central axis toward the blower wheel, with the second section being closer to the blower wheel than the first section is. The vanes of the plurality of vanes slope in a second direction as they extend along the central axis towards the blower wheel, the second direction being opposite to the first direction.

Abstract: A blower device for a heating, ventilation and air conditioning system, including: a blower housing defining an internal volume with an inlet and an outlet; a blower wheel with blower blades, arranged within the internal volume of the blower housing; a motor configured to rotate the blower wheel in a first direction around a central axis; a preswirler arranged within the inlet upstream of the blower wheel and including a plurality of vanes extending towards the blower wheel. Each vane of the plurality of vanes includes a first section and a second section, both extending along the central axis toward the blower wheel, with the second section being closer to the blower wheel than the first section is. The vanes of the plurality of vanes slope in a second direction as they extend along the central axis towards the blower wheel, the second direction being opposite to the first direction.

Abstract: An air supply unit, in particular for a heating, ventilation or air-conditioning unit in particular of a motor vehicle, an includes at least one air inlet, an air filter unit and a blower unit and an air outlet, wherein the filter unit comprises a filter housing in which a filter support is provided to support a filter element, which is located within the filter housing and which is supported within the filter housing by the filter support, wherein the filter support comprises an air guide for guiding air.