| 摘要 |
An apparatus comprising a first door panel; a second door panel coupled to the first door panel such that the first door panel and the second door panel form a hollow portion of a door panel assembly; and an insulating material placed within the hollow portion of the door panel assembly. An apparatus comprising a door panel assembly including a front side, a back side, a top side, a bottom side, a left side and a right side; a door frame surrounding the door panel assembly at the bottom side, the left side and the right side of the door panel, the door frame including a bottom portion, a left portion and a right portion; means for magnetically coupling the left side of the door panel assembly to the left portion of the door frame; means for magnetically coupling the right side of the door panel assembly to the right portion of the door frame; means for magnetically coupling the bottom side of the door panel assembly to the bottom portion of the door frame.
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