Abstract: A centrifugal fan assembly for improving flow of air through a heat exchanger. The fan assembly comprises a first subassembly comprising a first impeller flange and a second subassembly comprising a second impeller flange. Any of the first and second impeller flanges comprise a plurality of integrally formed impeller blades. The impeller blades and the first and second impeller flanges constitute an impeller. At least one impeller blade arranged on one of the two impeller flanges comprises at least one tab arranged to mate with a corresponding inlet cone arranged on the other of the two impeller flanges. The least one tab is arranged to be deformed when in a mating position with the corresponding inlet cone, thereby securing the two subassemblies together.

Abstract: A heat exchanger system for a vehicle includes at least one heat exchanger, a centrifugal fan assembly for improving the flow of air through the at least one heat exchanger, the fan assembly including a rotatably mounted impeller with a plurality of impeller blades, and a rotatable inlet shroud for guiding the air flow entering the impeller; and a stationary inlet shroud located between the at least one heat exchanger and the fan assembly and configured for directing air exiting the at least one heat exchanger towards the rotatable inlet shroud of the fan assembly. The fan assembly further includes a stator with a plurality of stationary stator blades located radially or semi-radially outside the impeller for conversion of fluid dynamic pressure to fluid static pressure of the air flow.

Abstract: A heat exchanger system for a vehicle includes at least one heat exchanger, a centrifugal fan assembly for improving the flow of air through the at least one heat exchanger, the fan assembly including a rotatably mounted impeller with a plurality of impeller blades, and a rotatable inlet shroud for guiding the air flow entering the impeller; and a stationary inlet shroud located between the at least one heat exchanger and the fan assembly and configured for directing air exiting the at least one heat exchanger towards the rotatable inlet shroud of the fan assembly. The fan assembly further includes a stator with a plurality of stationary stator blades located radially or semi-radially outside the impeller for conversion of fluid dynamic pressure to fluid static pressure of the air flow.