| 摘要 |
<p>A novel elongated heat transfer hollow tube (14) is formed of a metal that is preferable perforated and that heats and cools quickly, such as copper, aluminum, or brass. The hollow tube (14) has sufficient wall thickness for rigidity but is sufficiently thin to allow rapid heating and cooling. In addition, a novel heat source is formed with a light bulb (50), preferably halogen, located with said hollow tube (14) that likewise heats and cools quickly. The light bulb (50) is removable and replaceable in case of damage. A unique circuit automatically applies full power to the unit until it reaches the desired temperature and then allows a control circuit (80) to automatically reduce the power applied to a value sufficient only to maintain the desired temperature.</p> |
