2results about How to "Short delivery path" patented technology

The application discloses a household cleaning robot and belongs to the technical field of household robots. The household cleaning robot comprises a collecting box. The collecting box comprises a main body. A side opening is formed in the vertical side wall of the main body. A bottom opening is formed in the bottom surface of the main body. A filter core is arranged on the side opposite to the side opening of the main body. The application is provided with the collecting box, a sweeper, a converter, a cleaning and mopping device and a shell. When the bottom surface, the carpet and the junction of the ground and the carpet are cleaned, the converter can change the source position of the airflow entering the collecting box. Different negative pressure areas are generated at different positions below the shell. Greater negative pressure suction force can be used to intensively suck and sweep the edge of the carpet, the edge of the carpet is lifted, a rotating disc which can swing across the center line of the shell is matched, and the dead angle at the junction of the carpet and the ground is thoroughly cleaned.

The application discloses a preparation process of a surface composite protective coating of a neodymium-iron-boron magnet. The process utilizes the magnetostrictive effect of the magnet to drive the coating densification, comprising: providing a magnetized sintered neodymium-iron-boron magnet; coating a precursor coating containing low-melting-point metal alloy nanoparticles and graphene nanosheets; placing the magnet in an alternating magnetic field, and through three-stage variable-frequency vibration densification treatment, i.e. low-frequency driving macroscopic flow leveling, medium-frequency utilizing the intrinsic relaxation of the particle system to realize quasi-resonance rearrangement, and high-frequency driving pore collapse and interface diffusion, the porosity of the coating is reduced to below 1%, and the magnetic field strength is limited to 0.02-0.1 times the intrinsic coercive force of the magnet to ensure that the magnetic performance is not damaged; supplemented by semi-solid thixotropic heating, pulse current flash sintering and silane hole sealing treatment. The obtained composite coating has a gradient dense structure, the porosity is less than 1%, the interface shear strength is more than 30 MPa, the irreversible magnetic flux loss of the magnet substrate is less than 2%, and the process is green and simple.