Heater and annealing furnace using such heater

Abstract

A heater and an annealing furnace including: a housing having a heating chamber, where the heating chamber is provided with a limiting seat, and the limiting seat is provided with a limiting groove; and a heating rod fixed to the housing and extending into the heating chamber, where part of the heating rod located in the heating chamber is provided with a limiting rod. The limiting rod extends into the limiting groove, and a gap is present between the limiting rod and each of a groove wall and a bottom surface of the limiting groove. The limiting groove is used for restricting significant shaking of the heating rod and accommodating axial expansion of the heating rod after heating. The present invention can restrict significant shaking of the heating rod while accommodating the thermal expansion of the heating rod, ensuring the stability and service life of the heater.

Dependencies are inferred from the claim text.