JPS6414549A - Heater device - Google Patents

Abstract

PURPOSE:To promote a radiation thermal conducting action for a first thermal conducting pipe and a convection thermal conduction for a second thermal conducting pipe so as to improve an efficiency of thermal conduction by a method wherein the first thermal conducting pipe, a plate-like radiation body having through holes therein and the second thermal conducting pipe are arranged in this order from an upstream side and then a rate of opening of the radiation body is specified. CONSTITUTION:A plate-like radiation 27 having through holes with a rate of opening of 10-50% is laterally arranged between a first thermal conducting pipe 23 and a second thermal conducting pipe 25. Practically, a circumferential edge of the radiator 27 is mounted on stays 28 fixed to inner walls of a casing 20. A nominal diameter of each of the through holes is assumed to be 5-30mm. If the nominal diameter is more than 5 mm, a reaching distance of injection flow of hot gas discharged from the through holes is long and the gas sufficiently reaches up to a piping region of the second thermal conducting pipe. It the nominal diameter is less than 30mm, in particular, less than 15mm, it is possible to arrange the through holes substantially in uniform manner over a plate surface of the radiation body. A non- organic fibrous molded body is most preferably applied as the radiation body 27. The non- organic fibrous molded body has a resiliency and since it is endurable against a thermal shock received by the radiation body 27.