Rainproof dampproof venting device for building exterior walls

Abstract

The invention relates to a rainproof dampproof venting device for building exterior walls and belongs to the technical field of building. The rainproof dampproof venting device for building exterior walls comprises a peripheral receiving portion, a base and vent hole devices; the base is arranged at the center of the peripheral receiving portion; the two vent hole devices are arranged in the outersurface of the base. The rainproof dampproof venting device for building exterior walls can provide air flow exchanging between an exterior wall of a building and exterior air, is widely applicable,can effectively prevent the defects, such as exterior wall damp, mildews, and exterior wall covering tile separation, due to the ventilation problem of a building peripheral enclosure structure, can effectively prevent further erosive damage of the peripheral enclosure structure due to rainwater passing through vent holes, and has the advantages of good construction convenience, small size and thelike; the rainproof dampproof venting device for building exterior walls is friendly to the overall attraction of a building and is an excellent rainproof dampproof venting device; the rainproof dampproof venting device for building exterior walls has important economic and social benefits for the ventilation and energy-efficient development of building walls, and has a promising application prospect.

Description

technical field [0001] The invention relates to a rain-proof and moisture-proof device for building exterior walls, which belongs to the technical field of buildings. Background technique [0002] In the architectural design of severe cold regions, thermal insulation design is particularly important, and the wall thermal insulation system is the top priority of the entire building thermal insulation design. Because the indoor and outdoor temperature difference is huge, the water vapor pressure is high in the high temperature room, and the low temperature outdoor water vapor pressure is low. According to the principle of water vapor transfer, when there is a pressure difference between indoor and outdoor water vapor, water vapor molecules will pass from the side with higher pressure to the lower side through the wall. In the process of water vapor permeating along the wall to the outside, when the temperature reaches a dew point in a cold area inside the wall, it may cause c...

AI Technical Summary

Problems solved by technology

This is because as the water content increases, the connection of water molecules and solid particles is cut off, the micropores in the block absorb water molecules, and the thermal conductivity gradually increases; secondly, because the outdoor temperature is extremely low in severe cold areas, buildings The temperature difference between indoor and outdoor is large. When the moisture content of the wall increases, the water molecules are likely to freeze and change from liquid to solid, so that the volume becomes larger and expands, causing the wall to crack and form a cold bridge, which affects the thermal insulation performance of the whole building.

Images