Sealing structure of lifting type range hood, design method and lifting type range hood

The invention relates to a sealing structure of a lifting type range hood, a design method and the lifting type range hood, and the lifting type range hood comprises an upper box body, a lower box body and a lower box body, the lower box body is restrained on the upper box body and can do lifting motion relative to the upper box body, the lower box body is provided with a containing cavity with an opening in the top, and the containing cavity is used for at least partially containing the box body; the sealing structure is characterized in that a surrounding edge arranged around the peripheral wall of the upper box body is arranged in the containing cavity, a gap is reserved between the surrounding edge and the peripheral wall of the upper box body, the sealing structure comprises a flexible connecting piece arranged in the containing cavity, the upper end of the flexible connecting piece can be connected with the upper box body in a sealing mode, and the flexible connecting piece is configured to be in a stat