3results about How to "Avoid aging and shedding" patented technology

This utility model relates to a cross-arranged hybrid metastructure sound barrier structure, comprising a perforated panel (1), a metastructure module (2), and an assembly base (3) arranged sequentially. The perforated panel (1) includes a cross-arranged large-aperture panel (11) and a small-aperture panel (12). The metastructure module (2) includes a cross-arranged metastructure cotton module (21) and a low-frequency module (22). The assembly base (3) includes a cross-arranged metastructure cotton fixing base (31) and a low-frequency module fixing base (32). Compared with the prior art, this utility model uses lightweight composite acoustic metastructure materials and combines a hybrid design of irregularly shaped perforated panels, metastructure modules, and an assembly base to achieve wideband sound absorption and sound insulation, significantly improving noise control capabilities. At the same time, modular assembly helps reduce overall costs and is suitable for noise reduction needs in scenarios such as rail transit and elevated bridges.

The utility model relates to the field of building waterproofing, and discloses a waterproof structure and a roof waterproof system.The waterproof structure comprises a waterproof layer, a protection piece and a filling piece, the waterproof layer is laid on a roof, the tail end of the waterproof layer extends into a groove formed in the vertical face of a parapet wall, and the protection piece comprises a first plate body and a second plate body; the waterproof layer is pasted and covered with the first plate body, the first plate body is located on the lower side wall of the groove, the outer end, away from the bottom wall of the groove, of the first plate body extends to a groove opening of the groove, and the second plate body obliquely extends downwards in the direction away from the parapet wall from the outer end of the first plate body; the space between the first plate body and the upper side wall of the groove is filled with the filling piece. According to the waterproof structure, the integrity of the waterproof layer can be ensured, the leakage risk is reduced, the overall waterproof effect of the waterproof layer is remarkably improved, and meanwhile the later maintenance cost is reduced.

The application discloses a thermoelectric coupling fluid circulation temperature control assembly and a refrigerating system, and relates to the technical field of refrigeration. The assembly comprises a fluid conduit part and a thermoelectric conversion module. The fluid conduit part sequentially forms a fluid inlet, a first heat exchange section, a load connection loop section, a second heat exchange section and a fluid outlet along a fluid flow direction. The thermoelectric conversion module is clamped between the first and second heat exchange sections, the cold end surface of the thermoelectric conversion module cools the fluid flowing through the first heat exchange section, and the hot end surface of the thermoelectric conversion module is cooled by the fluid flowing back to the second heat exchange section through the load connection loop section. The application utilizes the cold energy recovery of fluid circulation to cool the hot end of the thermoelectric module, and utilizes the cold end of the thermoelectric module to supercool or precool the fluid, so that the heat energy management of self-cooling by using backflow cold energy is realized, the assembly can be efficiently operated without external fans, and the assembly has the advantages of compact structure, high energy efficiency, silence and the like.