作为我关于 石英板 波峰焊预热器的文章之后，本篇文章将专门讨论非常类似的石英管预热器。如果您还记得，使用石英板的优点之一是响应时间最快；然而，石英管的 响应时间更快。
The heating elements are placed inside the quartz tubes along with the thermocouples. The tubes can be quite fragile and, if items fall on them, they are likely to crack or break. One advantage, however, is that each tube can be turned on or off individually. This is beneficial if they are installed parallel to the conveyor because they will provide even heat no matter how wide the board is. If the conveyor system has a fixed width, they can be mounted perpendicular to the rails and be switched on or off individually to provide the required amount of preheat. If your wave soldering machine has the option for an automated and computer-controlled system, or has a fixed width, then these versatile preheaters are what you would want to use. It is common to couple the quartz tubes with hot air by either forcing heated or ambient air through the tubes. This is one of the more attractive options for technicians who do not have excess space in which to place a preheater.
下一篇文章将讨论两种类型的预热器：灯泡型红外线预热器和陶瓷板预热器。
*本文是题为 "预热 "的十二篇迷你系列文章中的第七篇。预热.本迷你系列是名为波峰焊接（分段概述）》大型计划的一部分。
