The closed balcony is usually a four-link window that connects the casement with the frame, and the other side uses the handle to open the window horizontally inside and outside or axially inside and outside. Casement window in the closed and locked state, the rubber sealing strip is compressed and elastically deformed in the sealing groove of the frame fan, forming a complete sealing system with good heat insulation, sealing and sound insulation performance.
Casement window is a window opened horizontally inside and outside or axially inside and outside with hinge dagger (four links, etc.) to connect the casement with the frame, and the other side uses handles. Casement window in the closed and locked state, the rubber sealing strip is compressed and elastically deformed in the sealing groove of the frame fan, forming a complete sealing system with good heat insulation, heat preservation, sealing and sound insulation performance. At the same time, it can be fully opened Casement in the open state, and the ventilation performance is also good.
However, because the connection between the fan and the frame is a cantilever stress structure, not only the cantilever effect of the whole Casement weight including glass should be considered, but also the wind load damage should be borne when opening outside, therefore, the moment of inertia of fan profiles should be large, and the quality requirements of hardware components are also high. At the same time, casement window fans inside will occupy part of the indoor space. The casement window outside will be affected by the quality of hardware, which will cause potential safety hazards to the outside, and the cost is relatively high. It is suitable for buildings in cold and hot areas or buildings with special requirements for sealing and heat preservation. Construction management departments in some areas stipulate that the use of external casement window is prohibited on high-rise buildings.
