Abstract
Aiming at the required of high air tightness, low flow resistance, rapid expansion, easy operation on orbit and hygiene in the space cabin, a low flow resistance ventilation hose which can be retracted quickly in the cabin is proposed. The ventilation hose is composed of metal support ring, air tight composite material, quick connection connector and clamp. After sewing the adhesive tape into a cylindrical tube, it is hot-melt welded with the titanium ring. The pipe body and the quick connection joint are connected and fixed by clamps. After structural design and test verification, a hose with an extension length of 10 meters can shrink to 0.42 meters. the air tightness is 0.96 L/min and the flow resistance is 120Pa. The ventilation hose has the advantages of reliable technology, compact structure, light weight and convenient use in orbit. It provides a new technical way and equipment for the ventilation system in manned spacecraft.
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