The invention relates to an inner and outer heat insulation hollow
casement window structure. A framework structure comprises a left side frame, a right side frame and a central column positioned between the left side frame and a right side frame; a fixed
glass window is arranged in a left groove and a right groove formed by the left side frame and the central column, a window sash is arranged between the central column and the right side frame and mounted on the right side frame; a first outer heat insulation part, a second outer heat insulation part and a third outer heat insulation part are respectively arranged on the outdoor sides of the left side frame, the central column and the right side frame, a first inner heat insulation part, a second inner heat insulation part, a third innerheat insulation part, a fourth inner heat insulation part and a fifth inner heat insulation part are respectively arranged on the indoor sides of the left side frame, the central column and the rightside frame, the fixed
glass window and the window sash are in hollow structures formed by a plurality of
layers of glass, and the multiple
layers of the glass are hermetically connected through heat insulation sealing parts. The inner and outer heat insulation hollow
casement window structure is simple in structure, convenient to manufacture and
assembly; the contact area between an aluminum profile and
atmosphere tends to be zero, the heat exchange of an aluminum
alloy framework caused by
air convection can be prevented, thereby improving the heat insulation performance and achieving the purpose of saving energy.