Heater

The utility model relates to a heater which comprises a heating rod, an annular base and a power connector, the power connector is fixedly connected with the annular base and electrically connected with the heating rod, a plurality of bolts are arranged between the heating rod and the annular base, the heating rod is fixed on the inner side of the annular base in a surrounding mode through the bolts, and the bolts are made of metal materials. The heating rod is electrically connected with the bolt, a U-shaped heating part is arranged on the heating rod, the U-shaped heating part comprises a first arc surface, a second arc surface and a semicircular arc surface, one end of the first arc surface and one end of the second arc surface are respectively connected with the semicircular arc surface, and the other end of the first arc surface and the other end of the second arc surface are respectively fixed on the heating rod. The heater has the beneficial effects that the heater is provided with at least one U-shape