Thermal insulated steel door

Abstract

This utility model discloses a heat-insulated steel door, including a steel door frame and a steel door body. The inner cavity of the steel door body is filled with a heat-insulating board body, which includes an aluminum silicate fiber board, a polyurethane foam board, and a perlite board. Mineral wool board is filled around the inner cavity of the steel door frame. Through the design of the heat-insulating board body, the aluminum silicate fiber board, polyurethane foam board, and perlite board all possess excellent heat insulation properties, forming a multi-layered heat insulation protection inside the steel door body. This greatly reduces the probability of heat loss from one side to the other during use, effectively improving the heat insulation performance of the steel door body. Simultaneously, the mineral wool board and mineral wool insulation pad provide good heat insulation protection inside the steel door frame and at the joints between the steel door frame and the surrounding wall during installation.

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