Two smart retractable sunrooms, with size of span7.9m×L32.9m×H1.02m and span7.9m×L26m×H1.02m respectively, and is a key upgrade project for the Hospital in Yiyang. It can not only transform idle atrium space into high-value commercial space, And it also ensures that the interior of the hospital building is no longer affected by seasons and harsh weather, makingthe hospital environment more comfortable. At the same time, the overall appearance of the hospital building has also been greatly improved.

The mechanical calculation, verification, and design of the retractable sunroom are based on the once-in-50-year wind and snow level of the location. The frame of the mobile sunroom is made of 6-series aviation aluminum alloy, and all connection points are reinforced with thickened built-in steel connectors and constructed using seamless splicing technology to ensure a firm and stable structure; Explosion proof tempered double-layer laminated glass is used, and the installation of the glass is fully protected and sealed with automotive grade EPDM rubber strips. The invisible fastening process is adopted, and the outer layer is sealed with automotive specific structural adhesive. The nested fan adopts a maze structure for wind, sand, dust, and air resistance, and the opening and closing parts adopt a male and female dynamic sealing structure. The five layer waterproof technology ensures very reliable waterproof performance.