43results about How to "Small power attenuation" patented technology

The invention discloses a metal PTC electric heating tube component of an air conditioner. A wound PTC heating filament of which two ends are sleeved and fixed with a conductive bar respectively, is placed in the center of a copper-plated iron pipe; a part of the conductive bars at two ends of the wound PTC heating filament is positioned outside the copper-plated iron pipe; magnesium oxide powderas heat conducting and insulating powder is filled in the copper-plated iron pipe; the wound PTC heating filament is tightly pressed in the center of the magnesium oxide powder in the copper-plated iron pipe; an aluminum pipe of a plurality of aluminum radiating fins is sleeved outside an expansion sleeve of the copper-plated iron pipe, namely the copper-plated iron pipe is tightly matched with the aluminum pipe, and the aluminum pipe is tightly matched with the aluminum radiating fins; and pipe orifices at two ends of the copper-plated iron pipe are sealed by silicon rubber and then sleeved into a porcelain head. The metal PTC electric heating tube component has the advantages of reasonable structure and better safety performance and durability. A manufacturing method for the component comprises the following steps: cutting the pipe, grinding the pipe, drilling the pipe, cleaning, winding wires, cleaning, drying, threading, measuring wires, spot welding, filling, stuffing a film, measuring withstood voltage, contracting the pipe, detecting the length of the pipe, middle inspection, peeling, pulling out colloidal particles, cutting a pin, straightening, inversing pipe angles, expanding the pipe, sealing, measuring the withstood voltage, measuring insulation, and measuring resistance.

The invention discloses a preparation method of a silane crosslinked ethylene-vinyl acetate copolymer adhesive film, which comprises the following steps: evenly mixing a composition, extruding, casting, cooling, drawing, and coiling to obtain the silane crosslinked ethylene-vinyl acetate copolymer adhesive film, wherein the extruding processing temperature is 100-150 DEG C; and the composition comprises the following components in parts by mass: 100 parts of ethylene-vinyl acetate copolymer, 0.1-2 parts of silane coupling agent A, 0.1-2 parts of silane coupling agent B and 0.01-0.2 part of organic peroxide. According to the invention, silane crosslinking is late crosslinking, crosslinking reaction does not need to be performed in a laminating machine, and the packaging of an assembly can be finished by simply pressurizing for 5-8 minutes under conventional treatment conditions in the vacuum laminating machine, thus greatly improving the laminating efficiency and saving the production cost.