DUAL ANNULAR HEAT PIPE FOR A HIGH PRECISION ISOTHERMAL FURNACE

摘要

A dual annular heat pipe for a high-precision isothermal furnace is provided to achieve high-precision isothermal by maintaining temperature deviation in an uniform area of a high-temperature furnace in a range of ±1 degree by using an annular space between dual pipes as an area acting as a heat pipe. A dual annular heat pipe(10) consists of an inner pipe(12) and an outer pipe(14) forming an annular space, and a wick(20) installed in the annular space. The wick includes an annular part(22) surrounding an outside of the inner pipe and the inside of the outer pipe, and connecting parts(26) vertically connecting inner and outer annual parts of each pipe at regular intervals for forming communicating spaces(24) between the annular parts. A heating medium of the annular space between the inner pipe and the outer pipe is heated by a heating source installed at the outside of the outer pipe for generating vapor at the inside of the outer pipe. The generated vapor moves in a radial direction through the communicating spaces of the wick and condenses at an outer wall of the inner pipe to transfer heat. The condensed vapor is returned to an external heating source through the connecting parts by capillary power of the wick to have high-precision isothermal.