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1. 发明授权

US5683242A Oven with temperature balancing 失效
标题翻译：烤箱与温度平衡
公开(公告)号：US5683242A
公开(公告)日：1997-11-04
申请号：US352514
申请日：1994-12-09
申请人： John V. Cronin , Peter R. Rose , Mark A. Stroud , David M. Koistinen
发明人： John V. Cronin , Peter R. Rose , Mark A. Stroud , David M. Koistinen
IPC分类号： F27B9/10 , F27D19/00 , F27B9/02
CPC分类号： F27D19/00 , F27B9/10
摘要： An oven for electronics manufacturing including a heated chamber having openings at each end to the ambient environment wherein heated air is circulated by a centrally located fan to pass over workpieces in a substantially upward (or downward) flow. Equal temperatures at the entrance and exit ends of the heated chamber are promoted by a crossover air return arrangement in which a portion of the air from each end of the heated chamber is mixed with the air from the other end of the chamber as the circulating air is drawn into the fan for recirculation. In addition, a moveable shutter mechanism is provided at the entrance end and exit end of the heated chamber to adjust the air flow at the ends of the heated chamber. The shutter mechanism operates to selectively close off an adjustable portion of the heated air flow at the ends of the heated chamber. A closed loop control system maintains equal temperatures and air flow at the opposite ends of the heated chamber by periodically adjusting the shutter mechanism position in response to the measured temperatures of the air immediately outside the entrance and exit ends of the heated chamber.
摘要翻译：一种用于电子制造的烤箱，包括在每个端部处具有围绕周围环境的开口的加热室，其中加热的空气由位于中心的风扇循环，以大致向上（或向下）流动的工件。加热室的入口和出口端的相等温度通过交叉空气返回装置促进，其中来自加热室的每个端部的空气的一部分与来自腔室的另一端的空气作为循环空气混合被吸入风扇进行再循环。此外，在加热室的入口端和出口端处设置可移动的快门机构，以调节加热室的端部处的空气流。快门机构操作以选择性地关闭加热室的端部处的加热空气流的可调整部分。闭环控制系统通过响应于紧邻加热室的入口和出口端处的空气的测量温度周期性地调节快门机构位置，在加热室的相对端保持相等的温度和空气流。

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