Abstract: A variable flux permanent-magnet synchronous motor, a powertrain, and a fan are disclosed, which are applied to the field of motors. The variable flux permanent-magnet synchronous motor includes a stator system 10, a rotor system 20, and a variable magnet system 30. The variable magnet system 30 is located in the stator system 10 or the rotor system 20. The rotor system 20 includes a first permanent magnet 201. The variable magnet system 30 includes a second permanent magnet 301 and a heating apparatus 302. Coercive force of the second permanent magnet 301 is lower than coercive force of the first permanent magnet 201. The heating apparatus 302 is configured to heat the second permanent magnet 301, so that the second permanent magnet 301 has variable flux in a magnetic field.

Abstract: A centrifugal fan and an air conditioning apparatus are provided. The centrifugal fan includes a top plate, a baseplate, a motor, a flow guiding cover, and a plurality of blades. A motor mounting hole is disposed at a central position of the baseplate, and the motor has a motor housing. The motor housing is mounted on the motor mounting hole and is fastened to the baseplate, and the motor at least partially extends between the baseplate and top plate. The blades are fastened between the top plate and the baseplate, and the plurality of blades are disposed around the motor. The flow guiding cover is sheathed on an outer peripheral side of the motor housing, and is detachably mounted on the baseplate.

Abstract: A centrifugal fan and an air conditioning apparatus are provided. The centrifugal fan includes a top plate, a baseplate, a motor, a flow guiding cover, and a plurality of blades. A motor mounting hole is disposed at a central position of the baseplate, and the motor has a motor housing. The motor housing is mounted on the motor mounting hole and is fastened to the baseplate, and the motor at least partially extends between the baseplate and top plate. The blades are fastened between the top plate and the baseplate, and the plurality of blades are disposed around the motor. The flow guiding cover is sheathed on an outer peripheral side of the motor housing, and is detachably mounted on the baseplate.

Abstract: Aspects relate to improved floor boards. Certain embodiments may be laid and fixed without the need for fixing with adhesive or nails. In one embodiment, a floor board includes a four-sided surface board connected to a four-sided base board. Further example floor boards includes staggered tongue-shaped hooking tongues for connection of multiple floor boards.

Abstract: Aspects relate to improved floor boards. Certain embodiments may be laid and fixed without the need for fixing with adhesive or nails. Example floor boards are convenient for use and simple in structure, and after a decorative strip is adopted, it further has the advantage of good decorative effects. In one embodiment, a floor board includes a four-sided surface board connected to a four-sided base board. In one embodiment, positions of board-shaped hooking tongues on two edges of the base board body and positions of board-shaping hooking tongues on two other edges of the base board body are arranged in a staggered manner, and the positions of buckles on two edges of the base board body and the positions of buckles on two other edges of the base board body are arranged in a staggered manner.

Abstract: Aspects relate to improved floor boards. Certain embodiments may be laid and fixed without the need for fixing with adhesive or nails. In one embodiment, a floor board includes a four-sided surface board connected to a four-sided base board. Further example floor boards include staggered tongue-shaped hooking tongues for connection of multiple floor boards.

Abstract: A floor board assembly convenient to lay is characterized in that, in one embodiment, it comprises a frame, a filler board and an upper material with the frame and filler board affixed to the underside of the upper material. The frame includes latch tongues that extend outwardly from the lower side edges of the frame, and the tongues have locking projections that fit into recesses arranged just inside the periphery of the underside of the frame. The tongues and intervening spaces (with locking bars behind them) are space along the periphery of the board, such that any side of one board may be joined to any side of a similarly configured board. The upper material may be selected from a variety of materials, including LVT (luxury vinyl tile), carpet, high pressure laminate or other decorative material. The filler board may be selected to accomplish reduced cost, and/or improved acoustics. In other embodiments, a frame and/or upper material may be absent.

Abstract: Aspects relate to improved floor boards. Certain embodiments may be laid and fixed without the need for fixing with adhesive or nails. Example floor boards are convenient for use and simple in structure, and after a decorative strip is adopted, it further has the advantage of good decorative effects. In one embodiment, a floor board includes a four-sided surface board connected to a four-sided base board. In one embodiment, positions of board-shaped hooking tongues on two edges of the base board body and positions of board-shaping hooking tongues on two other edges of the base board body are arranged in a staggered manner, and the positions of buckles on two edges of the base board body and the positions of buckles on two other edges of the base board body are arranged in a staggered manner.

Abstract: A floor board assembly convenient to lay is characterized in that, in one embodiment, it comprises a frame, a filler board and an upper material with the frame and filler board affixed to the underside of the upper material. The frame includes latch tongues that extend outwardly from the lower side edges of the frame, and the tongues have locking projections that fit into recesses arranged just inside the periphery of the underside of the frame. The tongues and intervening spaces (with locking bars behind them) are space along the periphery of the board, such that any side of one board may be joined to any side of a similarly configured board. The upper material may be selected from a variety of materials, including LVT (luxury vinyl tile), carpet, high pressure laminate or other decorative material. The filler board may be selected to accomplish reduced cost, and/or improved acoustics. In other embodiments, a frame and/or upper material may be absent.