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.

Abstract: A fan for generating a gas flow for an air-conditioning system includes a housing having a pressure chamber and a suction chamber open to each other via a connecting opening. An impeller is arranged in the housing and includes an axial suction side arranged at the connecting opening and a radial pressure side arranged in the pressure chamber. An inlet and an outlet are disposed in the housing for communicating the gas flow. A fan cut-off is disposed on the housing between the pressure chamber and the outlet. At least one cover element is arranged in the inlet and axially spaced from the connecting opening to cover at least part of a flow cross-section of the inlet.

Abstract: A housing of a centrifugal blower for use in an air conditioner is provided that includes a rotatably supported fan wheel, an inlet opening disposed in the axial direction of the fan wheel and an outlet opening disposed in the radial direction of the fan wheel. A widening diffuser is disposed downstream from the outlet opening in the flow direction, and the fan wheel is disposed in an inner volume of the housing. A crossover area formed from multiple openings is provided on at least one housing wall which delimits the inner volume. At least one chamber is disposed on the outside of the housing, the chamber completely covering the crossover area and being fluidically connected to the inner volume of the housing via the crossover area.

Abstract: A fan for generating a gas flow for an air-conditioning system may include a housing having a pressure chamber and a suction chamber that may be open to each other via a connecting opening. An impeller may have an axial suction side arranged at the connecting opening and a radial pressure side arranged in the pressure chamber. An inlet and an outlet may be disposed on the housing for communicating the gas flow. A fan tongue may be disposed on the housing between the pressure chamber and the outlet. At least one cover element may be arranged in the inlet. The at least one cover element may be axially spaced from the connecting opening and may cover at least part of a flow cross-section of the inlet.

Abstract: A housing of a centrifugal blower for use in an air conditioner is provided that includes a rotatably supported fan wheel, an inlet opening disposed in the axial direction of the fan wheel and an outlet opening disposed in the radial direction of the fan wheel. A widening diffuser is disposed downstream from the outlet opening in the flow direction, and the fan wheel is disposed in an inner volume of the housing. A crossover area formed from multiple openings is provided on at least one housing wall which delimits the inner volume. At least one chamber is disposed on the outside of the housing, the chamber completely covering the crossover area and being fluidically connected to the inner volume of the housing via the crossover area.

Abstract: The invention relates to a blower wheel, especially a plastic blower wheel for a cylindrical rotor radial fan for the heating and air-conditioning systems of a motor vehicle. Said blower wheel comprises a plurality of blades (2), and the flow channel (3) between two blades (2) is embodied in such a way that it is convergent on the inflow side, divergent on the outflow side, and distinctively shaped.

Abstract: The invention relates to a blower wheel, especially a plastic blower wheel for a cylindrical rotor radial fan for the heating and air-conditioning systems of a motor vehicle. Said blower wheel comprises a plurality of blades (2), and the flow channel (3) between two blades (2) is embodied in such a way that it is convergent on the inflow side, divergent on the outflow side, and distinctively shaped.