A plural-fans driving apparatus is provided to drive a first fan and a second fan, and the first fan and the second fan are three-phase fans. The plural-fans driving apparatus includes a controller, a first three-phase motor driver structure, a second three-phase motor driver structure, and a protection and input interface circuit. The protection and input interface circuit is coupled to the first three-phase motor driver structure and the second three-phase motor driver structure, and protects the first three-phase motor driver structure and the second three-phase motor driver structure. The controller controls the first three-phase motor driver structure to drive the first fan, and controls the second three-phase motor driver structure to drive the second fan.

The invention concerns an impeller (1a, 1b, 1c, 1d, 1e, 1f) of a motor vehicle fan comprising: a cylindrical ring (2) having a center (P), blades (3) extending from the cylindrical ring (2) and toward the center (P), each blade (3) having two radially opposite ends (4, 5), referred to as the blade root end (4) and the blade tip end (5), the blade root end (4) being directed toward the center (P) and the blade tip end (5) being secured to the cylindrical ring (2), characterized in that all the blade root ends (4) are free or linked together by a central hub (20) of reduced diameter.

An electric motor for vehicle including a stator; a stator support member; a rotation shaft; a rotor including a bottom wall and a peripheral wall, in which the peripheral wall is provided with a magnet and the bottom wall is configured to be combined with the rotation shaft; and a bearing holder including a tube part, and a water drip hole is formed on a vertically lower side of the tube part, the stator support member being provided with a bearing holder insertion part including a boss part into which the tube part is configured to be inserted, wherein a water drain structure configured to drain a water drop from the water drip hole is provided along a circumferential direction of an inner circumferential surface of the boss part in a vertically lower area of the inner circumferential surface of the boss part.

A rotary heat exchanger includes a hub configured to be rotatably driven by a shaft, a fan including a plurality of fan blades integrally coupled to the hub and extending radially outwardly therefrom, and a heat exchanger including a plurality of heat exchanger sections. The heat exchanger includes a plurality of cooling fins for receiving air from the fan. Each of the plurality of heat exchanger sections is located between two of the plurality of fan blades. The hub, the fan, and the heat exchanger are integrally formed as a single body by a three-dimensional printing process.

The propeller (16) for a fan (14) of a motor vehicle thermal system (10) comprises a bowl (22) for receiving a motor (18) of the propeller (16) and at least one blade (34) connected to the receiving bowl (22), the receiving bowl (22) further comprising: a central member (26) comprising at least one through-orifice (30), a collar (28) extending around the central member (26), the blade (34) extending radially outwards from the collar (28), and at least one rib (36) arranged on a front face of the collar (28), with reference to a direction of flow of an air flow (F) generated by the propeller (16), extending radially outwards so as to have a curved shape oriented in the opposite direction to a direction of rotation of the propeller (16).

An electric drive for a motor vehicle, in particular a fan drive, comprising an electric motor that includes a rotor which is mounted on a motor shaft so as to be able to rotate about a stationary stator as well as a driving part which is coupled to the rotor, and at least one electroconductive cover part for influencing and/or blocking interfering electromagnetic fields generated during operation of the electric motor.

An air-cooling device for a boat includes a plurality of misting modules and a pump. Each misting module comprises a housing that defines an interior space. The housing has a back that is coupled to a sidewall of a boat. A plurality of slots is positioned in the housing and is configured for air to enter the interior space. A plurality of orifices is positioned in a front of the housing. A plurality of fans is coupled to the housing and positioned in the interior space. Each fan is positioned in an associated orifice. A plurality of nozzles is coupled to the front of the housing. The pump is operationally coupled to the nozzles and a source of water. The pump is positioned to pump water through the nozzles to form a mist. The fans are configured to disperse the mist to cool an area proximate to the housing.

A motor assembly includes a shaft, an electric motor operatively connected to the shaft to drive the shaft in a first rotational direction, a clutch assembly connected to the shaft, and a fan connected to the clutch assembly and configured to supply the electric motor with cooling air. The clutch assembly drives the fan when the electric motor drives the shaft and allows the fan to freewheel in the first rotational direction when the electric motor is not driving the shaft. A method of operating a fan cooled electric motor includes energizing the electric motor to drive a shaft in a first rotational direction using the electric motor and de-energizing the electric motor so that it no longer drives the shaft, allowing the fan to freewheel in the first rotational direction.

The present invention provides an adapter device for attaching a cooling fan to a motor in a cooling fan module for an automotive cooling system. The device includes a connection member for rotationally fixed connection with a rotor of the motor. The rotor is surrounded by a stator comprising windings or coils arranged annularly about the rotor. The connection member is separate from the rotor and is configured for insertion into a central aperture or opening of the rotor for connection thereto via an outer surface of the connection member. An attachment member is provided at an end region of the connection member for attachment of a cooling fan thereto. The adapter device is configured to accommodate at least one bearing which supports the rotor for rotation about a rotational axis.

There is provided a radiator reservoir tank including: a tank body that is connected to a radiator and that includes an inlet section and an accumulation section for cooling water; a first rib that is disposed inside the tank body, and that extends out from a side wall at one side of facing side walls of the tank body toward another side, and that partitions between the inlet section and the accumulation section, and that is provided with a gap to the side wall at the other side; and a second rib that is provided further toward the inlet section side or the accumulation section side than the first rib, that extends out from the side wall at the other side toward the one side, and that is provided with a gap to the side wall at the one side.