Energy-saving furnace core

The invention discloses an energy-saving furnace core, and belongs to the technical field of stoves, the furnace core is provided with a furnace core wall, the furnace core wall is provided with an inner layer wall and an outer layer wall, and a gap is arranged between the inner layer wall and the outer layer wall; the top of the inner-layer wall is lower than the outer-layer wall; a furnace core body is fixedly arranged on the inner side wall of the inner layer wall; a fire-gathering ring inner ring is arranged at the top of the furnace core body, the top of the fire-gathering ring inner ring is as high as the top of the outer-layer wall, and air holes are formed in the side face of the fire-gathering ring inner ring; a fire gathering ring bottom plate is arranged outside the fire gathering ring inner ring, and blocking teeth and notches are arranged on the outer edge of the fire gathering ring bottom plate at intervals. The outer edges of the retaining teeth are positioned on the inner side surface of the o