Electric heating constant-temperature filtering device

The utility model discloses an electric heating constant-temperature filtering device, which belongs to the technical field of filtering and comprises a heat-insulating funnel, an electric heating tape is arranged on the inner side of the heat-insulating funnel, a high-temperature-resistant heat-insulating layer is arranged on the outer surface of the electric heating tape, a constant-temperature socket is arranged on the outer surface of the heat-insulating funnel, and jacks of the constant-temperature socket are exposed out of the surface of the high-temperature-resistant heat-insulating layer. The sand core funnel is reasonable and compact in structure and convenient to use, the heating belt is arranged on the inner side of the heat preservation funnel, and the high-temperature-resistant heat preservation layer is arranged on the outer surface of the heating belt, so that the purpose of uniformly heating the sand core funnel is achieved; the heat preservation funnel is connected to the controller through a