Abstract: A waste-heat recovery system includes a main power unit, an auxiliary power unit and a transmission unit. The main power unit includes a main engine, a main output shaft that is driven by the main engine, and a heat pipe that is connected to the main engine. The auxiliary power unit includes a stirling engine that is connected to the heat pipe, and an transmission shaft that is driven by the stirling engine. The transmission unit is disposed between the main output shaft and the transmission shaft for transmitting torque from the transmission shaft to the main output shaft.

Abstract: A battery management device is configured to detect a present state of an electric device, and control supply of electric power from a battery device to a load of the electric device. The battery device includes a plurality of battery units that are electrically connected. The battery management device disables each of the battery units to stop supply of the electric power to the load when the electric device is detected to be in an abnormal state.

Abstract: A steering device for a surfboard includes a steering unit, a driving unit and a transmitting unit. The steering unit is operable for controlling a movement of the surfboard. The driving unit includes a base seat secured to a board body of the surfboard, a rotatable linking member disposed in the base seat, and a drive arm mounted with a handle. The drive arm is rotatable and substantially untwistable, is connected to the linking member, and extends outwardly of the base seat. Rotation of the drive arm drives the linking member to rotate, thereby driving operation of the steering unit via the transmitting unit.

Abstract: An air conditioning system includes an air conditioning unit and an electricity generating unit. The air conditioning unit includes an expansion valve, an evaporator, a compressor and a condenser that cooperate to form a first coolant circulating loop for circulation of a first coolant. The electricity generating unit includes a heat radiator disposed adjacent to the evaporator, a heat absorber coupled to the heat radiator and disposed adjacent to the condenser, a turbine coupled between the heat radiator and the heat absorber, and an electricity generator coupled to the turbine. The heat radiator, the heat absorber and the turbine cooperate to form a second coolant circulating loop for circulation of a second coolant. The electricity generator converts mechanical energy from the turbine into electricity.

Abstract: A water motorcycle includes a motorized surfboard unit having a deck portion and driven by a drive motor, and a motorbike frame unit detachably mounted on the deck portion by means of retaining hook units. The motorbike frame unit includes a seat module provided with a rider's seat, and a handle module provided with an upright handlebar frame. The surfboard unit can be used independently for surfing or combined with the motorbike frame unit to function as a water motorcycle.

Abstract: An electric motor includes a rotor unit disposed rotatably in a motor housing. The rotor unit includes a rotor shaft rotatable relative to the motor housing about a central axis of the motor housing, a heat conductive seat mounted with a magnet member and in sleeved relationship to an intermediate portion of the rotor shaft, and angularly spaced apart heat pipes extending through an end portion of the rotor shaft thicker than the intermediate portion and into the seat. Each heat pipe has an end portion disposed outward of the rotor shaft, and extending into and in thermal contact with a heat conductive impeller connected to the second end portion of the rotor shaft to co-rotate with the rotor shaft and covered by an outer shell cap. A stator unit is mounted fixedly in and is in thermal contact with the motor housing, and is disposed around the rotor unit.

Abstract: A charge system for series connected rechargeable batteries includes: a power generating unit generating a DC input power based on a voltage input from an AC power source; a charge control unit generating a charge voltage based at least the DC input power from the power generating unit and supplying the charge voltage to the rechargeable batteries through an interface unit; and multiple detecting units each detecting a voltage of a corresponding rechargeable battery through the interface unit, generating a feedback power based on the voltage of the corresponding rechargeable battery upon detecting that the voltage of the corresponding rechargeable battery is within a predetermined voltage range, and outputting the feedback power to the charge control unit such that the charge voltage is generated by the charge control unit further based on the feedback power from any one of the detecting units.

Abstract: A power supplying system includes multiple rechargeable battery devices each including a first switch module, a series connection of a battery unit which includes multiple rechargeable batteries connected in series with each other and a second switch module connected in parallel to the first switch module, and a control module for controlling operations of the first and second switch modules. For each rechargeable battery device, the first and second switch modules are normally operated in an OFF-state and an ON-state, respectively, and the control module enables the first and second switch modules to switch respectively from the OFF-state and the ON-state to an ON-state and an OFF-state upon detecting that a voltage of any one of the rechargeable batteries of the battery unit is not within a predetermined voltage range during charging or discharging of the battery unit.

Abstract: An air conditioning system includes an air conditioning unit and an electricity generating unit. The air conditioning unit includes an expansion valve, an evaporator, a compressor and a condenser that cooperate to form a first coolant circulating loop for circulation of a first coolant. The electricity generating unit includes a heat radiator disposed adjacent to the evaporator, a heat absorber coupled to the heat radiator and disposed adjacent to the condenser, a turbine coupled between the heat radiator and the heat absorber, and an electricity generator coupled to the turbine. The heat radiator, the heat absorber and the turbine cooperate to form a second coolant circulating loop for circulation of a second coolant. The electricity generator converts mechanical energy from the turbine into electricity.

Abstract: A motor assembly includes a housing, a revolving shaft revolvably mounted in the housing, a magnet mounting portion surrounding and rotatable with the revolving shaft, a magnet disposed on the magnet mounting portion, a magnetically inducible core having a plurality of stator poles spaced apart from rotor magnetic poles of the magnet, and a plurality of stator windings wound on the stator poles, respectively. The stator windings are spaced apart from end walls of the housing by axial intervals. A thermally conductive bridging member is disposed to span the axial intervals to conduct heat emanating from the stator windings to the end walls so as to dissipate heat out of the housing.

Abstract: An electric motor includes a rotor unit disposed rotatably in a motor housing. The rotor unit includes a rotor shaft rotatable relative to the motor housing about a central axis of the motor housing, a heat conductive seat mounted with a magnet member and in sleeved relationship to an intermediate portion of the rotor shaft, and angularly spaced apart heat pipes extending through an end portion of the rotor shaft thicker than the intermediate portion and into the seat. Each heat pipe has an end portion disposed outward of the rotor shaft, and extending into and in thermal contact with a heat conductive impeller connected to the second end portion of the rotor shaft to co-rotate with the rotor shaft and covered by an outer shell cap. A stator unit is mounted fixedly in and is in thermal contact with the motor housing, and is disposed around the rotor unit.

Abstract: A motor assembly includes a housing, a revolving shaft revolvably mounted in the housing, a magnet mounting portion surrounding and rotatable with the revolving shaft, a magnet disposed on the magnet mounting portion, a magnetically inducible core having a plurality of stator poles spaced apart from rotor magnetic poles of the magnet, and a plurality of stator windings wound on the stator poles, respectively. The stator windings are spaced apart from end walls of the housing by axial intervals. A thermally conductive bridging member is disposed to span the axial intervals to conduct heat emanating from the stator windings to the end walls so as to dissipate heat out of the housing.

Abstract: A boat includes a boat body and an accompanying device. The boat body includes a hull defining a first accommodation space and having left and right sides, an electric motor disposed on the hull, and a propulsion unit driven by the motor. The accompanying device includes at least one carrier assembly. The carrier assembly includes a carrier attached to either the left or right side of the hull and disposed outwardly of the hull so as to define a second accommodation space, and a battery set disposed within the second accommodation space and connected electrically to the motor for supplying electricity to the motor.

Abstract: A rehabilitation exercise device includes a head support unit having a head cushion adapted to support the head of a user, and a frame holding the head cushion and having two opposite connection ends. Two side cushions are disposed respectively on two opposite sides of the head cushion, and are connected pivotally and respectively to the connection ends so that the side cushions are rotatable toward or away from the head cushion. A biasing unit is connected to the side cushions to bias the side cushions to rotate toward the head cushion.

Abstract: A motor device includes a motor body and a set of heat-conducting pipes. The motor body includes a motor casing that defines a chamber, a stator that is disposed in the chamber, and a rotor that is rotatably disposed in the chamber. Each of the heat-conducting pipes has a heat-absorbing end that extends into the motor body, and a heat-dissipating end that is opposite to the heat-absorbing end and that extends outwardly of the motor body.

Abstract: A propeller driven surfing device includes a buoyant body having an outer contour divergent from a nose end to a front trunk segment, a rearmost surface which has a water outlet port that extends forwardly to form a water passage, and a water intake port that extends from a bottom surface to be communicated with the water passage. A drive motor is disposed in the buoyant body, and has an output shaft which extends into the passage to drive a propeller disposed in the passage. A power supply is disposed in the buoyant body and is operably coupled to the drive motor.

Abstract: A closed-type motor includes a casing defining a chamber, a stator fixed in the chamber, a rotor mounted in the chamber and rotatable relative to the stator, and a cooling tube having inlet and outlet ends, and an intermediate portion interconnecting the inlet and outlet ends and located within the chamber. The inlet end extends out of the casing, and is adapted for entry of a cooling fluid. The outlet end extends out of the casing, and is adapted for exit of the cooling fluid that flows through the intermediate portion.

Abstract: A propeller driven surfing device includes an elongated body defining an accommodation chamber for receiving a drive motor and a power supply therein. A propeller is driven by the drive motor, and is disposed outwardly and rearwardly of the elongated body. A shell member includes a front surrounding segment which surrounds and which is spaced apart from the elongated body to define a passageway therebetween, and a rear surrounding segment which extends rearwardly to terminate at a distal end that is disposed rearwardly of the propeller. The front surrounding segment and the distal end respectively define a water intake port and a water outlet port which are disposed upstream and downstream of the passageway, respectively, such that water flows from the intake port and out of the outlet port through the passageway.

Abstract: A propeller driven surfing device includes an elongated body defining an accommodation chamber for receiving a drive motor and a power supply therein. A propeller is driven by the drive motor, and is disposed outwardly and rearwardly of the elongated body. A shell member includes a front surrounding segment which surrounds and which is spaced apart from the elongated body to define a passageway therebetween, and a rear surrounding segment which extends rearwardly to terminate at a distal end that is disposed rearwardly of the propeller. The front surrounding segment and the distal end respectively define a water intake port and a water outlet port which are disposed upstream and downstream of the passageway, respectively, such that water flows from the intake port and out of the outlet port through the passageway.