2results about How to "Strong sound absorption" patented technology

This utility model provides a composite perforated wood-plastic composite sound-absorbing wall panel, relating to the technical field of building materials. The composite perforated wood-plastic composite sound-absorbing wall panel comprises, from top to bottom, a veneer layer, a wood-plastic composite layer, and a sound-absorbing layer. The veneer layer has evenly distributed through-holes, and the wood-plastic composite layer has sound-absorbing grooves. The through-holes and sound-absorbing grooves are interconnected, and the sound-absorbing grooves are dovetail grooves. The total thickness of the wall panel is ≤19mm. This utility model achieves a significant improvement in the sound absorption performance of the composite wall panel by designing through-holes in the veneer layer, designing sound-absorbing grooves communicating with the through-holes in the wood-plastic composite layer (designing the sound-absorbing grooves in the dovetail groove form), and then designing a sound-absorbing layer on the bottom surface of the wood-plastic composite layer. The sound absorption principle of this utility model is: using the Helmholtz resonance principle, combined with the oblique wall reflection of the dovetail groove and the excellent sound absorption performance of the wood-plastic composite material itself, to achieve a synergistic effect and significantly improve the sound absorption performance of the composite wall panel.

The utility model relates to the technical field of water saving of faucets, and discloses a water-saving faucet shell which comprises an outer shell, a protection assembly is fixedly connected to the outer side of the outer shell, a water stop assembly is arranged in the outer shell, and a flow guide assembly is fixedly connected to one end of the outer shell. According to the water-saving faucet shell, through the arrangement of the water stop assembly and the flow guide assembly, when the water-saving faucet shell is used, water flow impacts a connecting plate, so that an extrusion spring is in a compressed state, a water stop plug moves, the water flow enters a mounting box, and a flow guide plate in the mounting box combs and guides the water flow, so that water outlet is more uniform and gentle; when the faucet is closed, the spring is extruded to drive the connecting plate and the water stop plug to reset, and the water stop plug is tightly attached to a water flowing pipeline, so that the water flow is completely blocked, it is ensured that the faucet does not drip water or leak water, and water resource waste caused by water leakage and water dripping is reduced.