2results about How to "Offset stress" patented technology

The utility model relates to door and window technical field, concretely is the plastic steel door and window with the reinforcing rib in the inside, including the window frame, the inside installation of window frame has the window sash, the window sash is connected with the inside glass through the antiskid batten and installs, the inside of window frame is provided with the reinforcing rib net, the inside wall of window frame is connected with the outside wall of steel lining and installs, the inside of window frame is placed with the reinforcing angle steel. The improved plastic steel door and window, through the inside layer of window frame and add the reinforcing rib net, make the window frame outer frame and the reinforcing rib net in the inside form the overall structure, can effectively prevent the frame body to crack phenomenon, and in the inside of window frame and the window frame corner place are provided with the steel lining and the reinforcing angle steel, can effectively promote the structure strength of window frame whole, solved the existing plastic steel door and window window frame corner place easy to crack, the overall structure strength is low and the problem that easy window frame is received temperature change frame body expansion and contraction, is applicable to the climate changeable area building.

This invention discloses a black radiation-cooling thin film and its preparation method. The thin film comprises, from bottom to top, a substrate Sub, a black reflective module, and a radiation module. The structure of the black reflective module, from bottom to top, is MD1AD2, where M is a metal layer, D1 is a first dielectric layer, A is a visible light absorption layer, and D2 is a second dielectric layer. The structure of the radiation module, from bottom to top, is (A'1A'2A'3). s L, where A'1, A'2, and A'3 are the first, second, and third absorption layers, respectively, which have absorption in the 8μm-13μm band and high transmission in the 0.3μm-2.5μm band; L is a low refractive index protective layer; and s is the number of stacked periods, s≥1. This invention achieves good cooling performance while maintaining a black color.