Abstract: A power consumption control device includes: a voltage detection circuit configured to detect whether an input power supply of a magnetic levitation system to be controlled is turned off; and a comparison unit configured to detect an operating parameter of a motor of the magnetic levitation system during an operation of the motor as a generator, and compare the operating parameter with a set parameter to obtain a comparison result; a motor controller of the magnetic levitation system controls the motor of the magnetic levitation system to operate as the generator in a case that the input power supply is turned off, a bearing controller of the magnetic levitation system adjusts a magnitude of a bearing bias current of the magnetic levitation system according to the comparison result, to control a power consumption of a magnetic levitation bearing of the magnetic levitation system within a set range.

Abstract: A handheld mobile device casing and a molding method of the same includes manufacturing a glass part and a supporting part. The glass part is used as a sight window on the handheld mobile device casing, and the supporting part is used to support the glass part. The glass part is placed on the supporting part in a staggered manner, which is to say, one end of the supporting part is exposed out of the glass part. The injection molding is performed to form a handheld mobile device casing that encapsulates the glass part and supporting part. With that molding method, the boundary of the sight window can be tightly coupled to the casing, without any offset or clearance. The glass sight window has high hardness and is wear resistant. The molding process is easy to operate, and the subsequent assembly process can be simplified.

Abstract: The utility model relates to the technical field of driving structure, and provides a linear reciprocatingly movement-type driving structure and a cleaning tool. The linear reciprocatingly movement-type driving structure comprises of: a driving gear and a crown gear engaged with said driving gear; an eccentric cam that is set eccentrically on the crown gear, a first connecting shaft is set on said eccentric cam, a crankshaft is sleeved on the said first connecting shaft, while the crankshaft is connected to an output shaft. In the utility model, the driving method of the motor 16 could be changed from a 360-degree rotation into a linear reciprocating motion through the driving gear, the crown gear, the eccentric cam, the first connecting shaft, the crankshaft and the output shaft. Therefore the wear and tear is reduced and the service life is prolonged.

Abstract: The utility model relates to a technical field of eccentric structure, which is about an eccentric component and a cleaning brush. The eccentric component comprise of: an axle and a cylinder connected coaxially with such axle, a wedge is set eccentrically on a bottom surface of the cylinder. Said wedge has a convex curved cylindrical surface. The utility model can improve the antiwear property of the eccentric component and prolong its service life through the convex cruved cylindrical surface, which applies the force by linear contact onto the driving block on the application end to make it move reciprocatingly.

Abstract: An enhanced heat transfer tube with discrete bidirectionally inclined ribs (DBIR-tube) provides enhanced convective heat transfer both in laminar and turbulent flow regions. The inner surface of the tube is formed with bidirectionally inclined ribs, including left hand inclined ribs and right hand inclined ribs, with the ribs being in the form of discrete strip-like protrusions which respectively form a certain angle with respect to the axis of the tube and incline in two directions. With the hydrodynamic inner diameter of the tube represented by “d”, each bidirectionally inclined rib has a height less than or equal to 0.2 d, a circumferential width less than or equal to 0.5 d, and an axial length less than or equal to 2 d.