Patent ID: 8084717
Filing Date: 2011-12-27
Classification: B23K,F27B,H05K

Abstract:
1. A reflow furnace comprising a preheating zone, a main heating zone, and a cooling zone and having at least one heater provided in the upper portion or the upper and lower portions of the preheating zone and the main heating zone, wherein the heater comprises a hot air blowing heater having a fan and an electric heater inside it and having a plurality of discharge nozzles in its front surface, the discharge nozzles project from a front surface of the hot air blowing heater, the hot air discharge nozzles are arranged in a zigzag shape crossing the direction of travel of a printed circuit board, hot air suction ports which extend across the direction of travel of the printed circuit board are provided in the vicinity of the hot air discharge nozzles, the suction ports communicate with the suction side of the fan, and the discharge nozzles communicate with the discharge side of the fan.