Abstract: [Objective] The electro-thermal floor structure combined with solid wood and aluminum alloy core board is proposed, combined with the embedded manufacturing process of electric heating cable, to build a new type of electro-thermal floor with solid wood and aluminum core, in order to improve the thermal comfort of the electro-thermal floor heating and the heat transfer efficiency, to reduce the security hidden danger, and to provide technical support for the development and production of electro-thermal floor.[Method] The high-grade solid wood plate is used as the surface layer, and the low-grade veneer as the bottom layer. The electrically heating cable and aluminum alloy core plate are combined to form a heating core layer, and then the heating core layer is embedded into the groove of the panel layer of solid wood composite floor. The asbestos net is adhered as a thermal insulation layer under the heating core layer to ensure the thermal efficiency, the surface layer and the bottom plate are glued by a urea-formaldehyde resin glue, the tongue-and-groove floor was made by the high temperature and high pressure made. The finite element analysis software was used to simulate the heating process of composite solid wood floor with aluminum core.[Result] The surface temperature of the electro-thermal floor without aluminum core is 33.3℃ after 1 h heating, the temperature of the heating layer is concentrated, up to 60℃, existing safety hazard. When the electro-thermal floor is installed with a flat aluminum core radiator plate, the surface temperature of floor is about 29.7℃ after 1 h heating; As for the floor with ribbed aluminum core,the surface temperature of the floor is about 34.5℃, though the heat dissipation of ribbed structure is not as uniform as the flat type, but the temperature of the heating wire layer is the lowest and the comprehensive heat transfer efficiency is the best.[Conclusion] The upper surface temperature of the electro-thermal floor with ribbed aluminum core is higher than that without the aluminum core, and the heating speed is fast; the structure of the aluminum core also has an important influence on the heat transfer effect, the electro-thermal floor with ribbed aluminum core has a faster heating rate and a better heat transfer effect.

Key words: solid wood floors, the aluminum core, electro-thermal, the finite element