A vacuum reflow welding apparatus having furnace units connected in series according to temperature ranges.

Abstract

This invention relates to a vacuum reflow welding apparatus having furnace units connected in series according to temperature ranges. Unlike conventional apparatuses that perform reflow welding within a single reflow furnace unit, this apparatus divides the time-based temperature curve for reflow welding into a preheating range, a reflow range, and a cooling range. Each furnace has a unit furnace with a vacuum chamber that starts at the temperature and vacuum state corresponding to each range. These units are connected in series to form a furnace unit. By dividing multiple vacuum spaces into ranges, effective management of temperature and vacuum state can be achieved. Based on this, electricity can be effectively utilized, achieving energy-saving operation and reducing production costs. The vacuum spaces are formed according to temperature ranges, making it easy to locate the problem in case of malfunction or issues during reflow welding. This facilitates real-time response and easy maintenance during reflow welding. Welding in a vacuum space prevents voids.

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