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2. 发明授权

US4262191A Digital electronic steam humidifier control 失效
标题翻译：数字电子蒸汽加湿器控制
公开(公告)号：US4262191A
公开(公告)日：1981-04-14
申请号：US24701
申请日：1979-03-28
申请人： James M. Lepper , John C. McNabney , James A. Haas
发明人： James M. Lepper , John C. McNabney , James A. Haas
IPC分类号： F22B1/30 , F24F6/02 , H05B1/02 , H05B3/60
CPC分类号： F22B1/30 , F24F6/025
摘要： Disclosed herein is a method and a digital electronic steam humidifier control for use with a humidifier system including an electrode boiler to provide a normally repetitive fill, boil, fill-on-drain cycle. The humidifier control includes circuitry for providing an analog signal proportional to the electrode current, and a comparator network which receives the analog signal and a reference voltage and scaled voltages provided by additional circuitry to establish predetermined levels of electrode current at which the control responds. The comparator network provides a plurality of digital outputs having a high or low state depending upon the magnitude of the electrode current, which outputs are coupled to logic circuitry including NAND gates and which operates to actuate electrically controlled fill and drain valves to vary the water level so that the electrode current varies between predetermined lower and upper current limits, and which also operates to temporarily cut off the power to the electrodes if the electrode current exceeds a predetermined over-current limit. The logic circuitry also operates in conjunction with high water probes to prevent overfilling of the boiler and to cause boiling of the water without draining during start up so that the water acquires a predetermined higher level of conductivity so that the electrode boiler operates efficiently. An abnormal operation light and high and low current indicators are also provided to inform an operator of the status of operation of the control.
摘要翻译：本文公开了一种与包括电极锅炉的加湿器系统一起使用的方法和数字电子蒸汽加湿器控制器，以提供通常重复的填充，沸腾，在排水循环循环。加湿器控制包括用于提供与电极电流成比例的模拟信号的电路，以及接收模拟信号的比较器网络，以及由附加电路提供的参考电压和定标电压，以建立控制器响应的电极电流的预定水平。比较器网络根据电极电流的大小提供具有高或低状态的多个数字输出，该输出耦合到包括NAND门的逻辑电路，并且其操作以致动电控填充和排出阀来改变水位使得电极电流在预定的下限和上限电流之间变化，并且如果电极电流超过预定的过电流限制，其也可以临时切断对电极的功率。逻辑电路还与高水探头一起工作，以防止锅炉过度填充并引起水的沸腾而不会在启动期间排水，使得水获得预定的更高的导电率，使得电极锅炉有效地运行。还提供异常操作灯和高低电流指示器，以通知操作员控制的操作状态。

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