In order to ensure the design effect and beautiful appearancπe, the BMU equipment of super high-rise buildings is ♦now hidden in the equipment layer inside the building. When the equipφment is not in use, the curtain wall is closed to fo§rm a complete curtain wall facade. When the equipment need∞s to work, the curtain wall at this location needs to b₹e opened to a sufficient space to meet the working space of the BMU equipment. The curtain ★wall opening and closing system at this location is the BMU curtain wall opening ←and closing system.