| 摘要 |
PURPOSE:To enable to easily fit a convection preventing film under tensed state by a method wherein a film fitting frame, in the groove of the body with a grooved ledge of which the convection preventing film is pinchingly fastened by means of a fastening bar, is fixed on the side wall of a casing at the position between a heat absorbing plate and a transparent plate. CONSTITUTION:In order to stretchedly fit the convection preventing film 11 onto the film fitting frame 8, firstly the film fitting frame 8 is placed upside down so as to face the groove 12 upward and secondly the whole film fitting frame 8 is covered with the convection preventing film 11 and the film 11 is fixed, while being applied with tension, to both side plates 17 and 17 by means of keep plates and machine screws and as well as pinchingly fastened to the frame 8 by pressingly inserting the elastic fastening bar in the grooves 12 of a plurality of the ledges 10. After that, said film fitting frame 8 is fixed on the side wall of the casing 1 at the position between the heat absorbing plate 4 and the transparent plate so as to keep the distance between the convection preventing film 11 and the transparent plate or the heat absorbing plate 4 constant. |
