Abstract: Method for the quantitative determination of a current operating state-dependent variable, for example the pressure increase, of a fan, wherein, given a known volume or mass flow of the fan, a current operating state-dependent variable is determined via its rotational speed.

Abstract: A heating unit for a vehicle features a radial fan (100) having a housing (110), which housing has an air inlet (116) and an air exit opening (118). The heating unit has an air-directing device (140) that guides an air flow in a pressure chamber (115) of the housing (110) to the exit opening (118). Arranged in the housing (110) is a radial fan wheel (130) that serves to generate a flow from the air inlet (116) via the pressure chamber (115) to the air exit opening (118). Also provided is an electrical heating element, e.g. a PTC (Positive Temperature Coefficient) heating element (125), that serves to transfer heat to the air flow generated by the fan. Air-directing elements (632, 634, 636, 638) are provided between the exit opening (118) and the heating element (125), in order to generate an air flow having a more uniform (680) velocity distribution.

Abstract: An arrangement, for heat dissipation from a component that is to be cooled, features: a pump for pumping a coolant, which pump comprises a pump rotor; a fan that comprises a fan rotor associated with which is an electric motor to drive it, the pump rotor and the fan rotor being separated from one another in fluid-tight fashion and drivingly connected to one another via a magnetic coupling. It also relates to a method for heat dissipation from a component that is to be cooled, using a fan that comprises a fan rotor and a drive motor, using a pump that comprises a pump rotor, using a coolant that is pumpable by means of the pump, comprising the following steps: A) the fan rotor has a rotational motion imparted to it by means of the drive motor; B) the pump rotor has a rotational motion imparted to it, via the magnetic coupling, by means of the rotational motion of the fan rotor; C) the coolant is caused to flow by the rotational motion of the pump.

Abstract: A heat sink absorbs heat from a chip or other component (32) and transfers the heat to a cooling fluid (36). The sink has a shaped part (22?) on which are formed at least one element (56?) for supplying cooling fluid (36) and at least one element (62?) for removing cooling fluid (36). The heat sink has a heat absorber (68?) with a heat-absorption side (112u) that absorbs heat during operation and a heat-transfer side (78) in contact with the cooling fluid (36) during operation. The absorber has a depression (118) in which are arranged a plurality of elongated thermally conductive elements (84?) which are each connected at a first end to the depression (118), and each have a free end (78) projecting away from the depression (118). Optionally, the heat sink can be coupled to a radiating or cooling unit (38), a fluid-circulating pump (39) and a fan (40) for directing air over the cooling unit, in order to quickly dissipate the heat transferred to the cooling fluid (36).