Abstract: The invention is about a drying unit for a digital printing machine. The drying unit is made of an alternation of impingement nozzles and flotation nozzles connected to a common pressurized air source. The impingement nozzles have a counter roller that guides the substrate thanks to the drying air that pushes the substrate against the roller. The flotation nozzles are made of two nozzles facing each other and blowing with the same strength against the substrate that “floats” between them. The front nozzle air is used for drying, the back nozzle air is used for heating and for avoiding the substrate from getting unbalanced. The drying unit starts with an impingement nozzle that regulates the speed of the air to avoid the fresh ink from getting spread on the substrate. The flotation nozzles and the following impingement nozzles regulate the volume of blown air to set the drying capabilities of the drying unit.

Abstract: A fan assembly has a support structure and a motor fixed to the support structure. The motor has a stator, an outer rotor and a controller. Components of the controller are in a thermal exchange relationship with a plate-like heat sink at one end of the stator. A fan, fixed to the rotor, has a hollow hub from which blades extend. Air flows through inlet openings in a front wall of the hub. The heat sink has a slit with an outer side, axially offset from the inner side. A portion of the heat sink forms a wing deflecting part of the air flow coming from the inlet openings through the slit to pass over the surface of the heat sink.

Abstract: A fan module (1) includes a support structure (2), a motor (6), and an impeller (12). The support structure (2) includes an outer frame (3), an inner seat (5), and spokes (4) connecting the outer frame (3) to the inner seat (5). The motor (6) includes a stator (7) fixed to the inner seat (5), a rotor (8) rotatably mounted to the stator (7), a heat sink (11) at one end of the stator (7), and a control circuit (9) in thermal contact with the heat sink (11). The impeller (12) includes a hub (13) having a front wall (13a), a side wall (13b) spaced from the front wall (13a), and inner vanes (17) extending from the side wall (13b) and connected to the front wall (13a). Top ends of two adjacent inner vanes (17) are spaced from each other with an intake opening (17c) defined therebetween.

Abstract: A fan assembly has a support structure and a motor fixed to the support structure. The motor has a stator, an outer rotor and a controller. Components of the controller are in a thermal exchange relationship with a plate-like heat sink at one end of the stator. A fan, fixed to the rotor, has a hollow hub from which blades extend. Air flows through inlet openings in a front wall of the hub. The heat sink has a slit with an outer side, axially offset from the inner side. A portion of the heat sink forms a wing deflecting part of the air flow coming from the inlet openings through the slit to pass over the surface of the heat sink.

Abstract: A fan, for a ventilation assembly has blades extending from a cup-shaped central hub. The hub has an annular side wall and a bottom wall defining a receptacle for an electric motor. The hub has internal ribs for ventilation of the motor. Each rib has a longitudinal portion which extends along the side wall, a radial portion which extends along the bottom wall and an intermediate portion having an arcuate, transversely protruding profile. The longitudinal portion has a profile whose spacing from the side wall of the hub increases, from a minimum value remote from the bottom wall to a maximum value adjacent the bottom wall.

Abstract: A fan module (1) includes a support structure (2), a motor (6), and an impeller (12). The support structure (2) includes an outer frame (3), an inner seat (5), and spokes (4) connecting the outer frame (3) to the inner seat (5). The motor (6) includes a stator (7) fixed to the inner seat (5), a rotor (8) rotatably mounted to the stator (7), a heat sink (11) at one end of the stator (7), and a control circuit (9) in thermal contact with the heat sink (11). The impeller (12) includes a hub (13) having a front wall (13a), a side wall (13b) spaced from the front wall (13a), and inner vanes (17) extending from the side wall (13b) and connected to the front wall (13a). Top ends of two adjacent inner vanes (17) are spaced from each other with an intake opening (17c) defined therebetween.

Abstract: A fan, for a ventilation assembly has blades extending from a cup-shaped central hub. The hub has an annular side wall and a bottom wall defining a receptacle for an electric motor. The hub has internal ribs for ventilation of the motor. Each rib has a longitudinal portion which extends along the side wall, a radial portion which extends along the bottom wall and an intermediate portion having an arcuate, transversely protruding profile. The longitudinal portion has a profile whose spacing from the side wall of the hub increases, from a minimum value remote from the bottom wall to a maximum value adjacent the bottom wall.