| 摘要 |
A door system 10 for closing an aperture between spaces at different temperatures comprises a door member 12 of flexible fabric moveable between an open (fig 2) and closed configuration, and comprises an electrical heated element 22 used to heat the door. The door system may comprise left and right upright frame members 14a, 14b, an overhead hood / frame member 16 and a motor 18 to roll the door up and down. The door system closes a hatch 20 and the heated element is coextensive with the hatch. The heated element may be a printed metallic or graphene pad, mat or panel embedded within the door between at least two skins and located in a lower portion of the door. When raised an upper portion of the door becomes wound on a roller inside the overhead hood / frame member and when above the hatch leaves the hatch completely open. When raised the lower portion of the door 12 containing the heated element remains flat and is not rolled up. An insulating member (28, fig 5) may be embedded in the door. The door may be used in refrigerated stores and prevent ice forming on the door. |
