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公开(公告)号：US5530615A
公开(公告)日：1996-06-25
申请号：US163782
申请日：1993-12-06
CPC分类号： H01H9/56 , H01H2009/566 , Y10T307/951
摘要： An electronic control for gas furnaces controls a two speed main blower fan and an induction draft fan based on 24 volt input signals from a room thermostat, a high limit and an ignition control including a gas valve. The input signals are coupled to input ports of a microprocessor through current limiting resistors and to AC ground through pull down resistors. AC ground is also connected to the IRQ port of the microprocessor. Output ports of the microprocessor are connected to a relay driver which in turn is connected to relays for energizing and de-energizing the fans. The control calibrates itself on a continuing periodic basis to read the AC inputs synchronously at the peak of their wave and can switch the relays asynchronously based on the Real Time Clock of the microprocessor or can be switched synchronously by providing a selected delay so that contact engagement and disengagement occurs at or near the zero crossing of the AC line voltage wave form. When used with resistive loads the relays are switch in response to a signal from the microprocessor which is delayed based on the mechanical switching time constant of the relays to provide contact closure and opening at the selected point on the AC line voltage wave form. An alternate embodiment shows a feedback network used to calibrate the specific delay period for each relay upon initialization. When used with inductive loads contact closing can be effected synchronously and contact opening asynchronously.
摘要翻译： 燃气炉的电子控制器基于来自室温恒温器，上限和包括气阀的点火控制器的24伏输入信号来控制双速主鼓风机和引风机。 输入信号通过限流电阻耦合到微处理器的输入端口，并通过下拉电阻耦合到交流电源。 交流接地也连接到微处理器的IRQ端口。 微处理器的输出端口连接到继电器驱动器，继电器驱动器又连接到继电器，以使风扇通电和断电。 控制器在持续的周期性基础上自行校准，以在其波峰值同步读取AC输入，并且可以基于微处理器的实时时钟异步地切换继电器，或者可以通过提供所选择的延迟来同步地切换继电器，使得接触接合 并且在AC线电压波形的过零点处或附近发生分离。 当与电阻性负载一起使用时，继电器响应于来自微处理器的信号而被切换，该信号基于继电器的机械开关时间常数被延迟，以在交流线路电压波形上的选定点处提供触点闭合和断开。 替代实施例示出了用于在初始化时校准每个继电器的特定延迟周期的反馈网络。 当与感性负载一起使用时，触点闭合可以同步进行并且异步接触。
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公开(公告)号：US06237420B1
公开(公告)日：2001-05-29
申请号：US09291879
申请日：1999-04-14
IPC分类号： G01L700
CPC分类号： G05B23/0291 , G05B9/02
摘要： A microprocessor based control for monitoring oil pressure of compressors can use a normally open or a normally closed pressure switch (S1, S2) and LED indicator (LED1) having a diode isolated power supply (VDD−SENSOR) separate from the power supply (VDD) of the microprocessor (U1). Timing of the microprocessor is derived from the frequency of the line (60 Hz). The microprocessor is normally in a sleep mode and is awakened by each 60 Hz interrupt to check the condition of the pressure switch, the accumulated time that inadequate pressure has occurred and whether the relay needs to be energized and then returns to the sleep mode. The resulting reduced power requirement enables extended retention of accumulated “bad” oil time. Since oil pressure does not build-up to a satisfactory level for the first eight seconds or so upon start-up, the microprocessor senses whether the oil pressure indicates good oil immediately upon start-up which indicates a fault condition and if so will shut the system down but only after approximately four seconds which allows the compressor to be jogged, or momentarily energized, to force refrigerant out of the compressor and into the system, which is necessary on initial start-up of the compressor system.
摘要翻译： 用于监测压缩机油压的基于微处理器的控制器可以使用具有与电源（VDD）分离的二极管隔离电源（VDD-SENSOR）的常开或常闭压力开关（S1，S2）和LED指示灯（LED1） ）的微处理器（U1）。 微处理器的时序来自线路的频率（60 Hz）。 微处理器通常处于睡眠模式，并被每个60Hz的中断唤醒，以检查压力开关的状况，压力发生的累积时间以及继电器是否需要通电然后返回到睡眠模式。 所产生的减少功率要求能够延长保持累积的“不良”油时间。 由于在启动时的前8秒钟内油压不会达到令人满意的水平，所以微处理器会检测到油压是否在启动时立即显示良好的油，这表明故障状态，如果是这样，则关闭 系统下降，但仅在大约四秒钟之后，允许压缩机被点动或瞬间通电，以迫使制冷剂从压缩机流出并进入系统，这在压缩机系统的初始启动时是必需的。
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公开(公告)号：US06244515B1
公开(公告)日：2001-06-12
申请号：US09436126
申请日：1999-11-08
IPC分类号： G05D2300
CPC分类号： G05D23/1951 , F23N1/002 , F23N2023/22 , F23N2037/10
摘要： A gas furnace control for two stage gas furnaces which can be used with either a single stage or a two stage room thermostat monitors the length of time the first, low combustion, stage is energized and upon exceeding a selected period of time, e.g., 10 minutes, energizes the second, high combustion stage. Energization of the second stage signal (W2) also energizes the second stage without regard to timing of the first stage.
摘要翻译： 可以与单级或两级室温恒温器一起使用的两级气体炉的燃气炉控制器监测第一低燃烧级通电的时间长度，并且超过选定的时间段，例如10 分钟，激发第二个高燃烧阶段。 第二级信号（W2）的通电也使得第二级的通电不考虑第一级的定时。
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4.发明授权
公开(公告)号：US5902099A
公开(公告)日：1999-05-11
申请号：US742236
申请日：1996-10-31
CPC分类号： F23N5/203 , F23N5/123 , F23N2023/08 , F23N2025/04 , F23N2025/26 , F23N2027/38 , F23N2029/00 , F23N2031/10 , F23N2041/02 , F23N5/12
摘要： An electric control is shown adapted for use with gas furnaces which controls fan motors, ignition controls and a gas valve based on inputs from a room thermostat, limit switches, a flame probe, a flame roll-out probe, and a condensate sensor. A roll-out detection circuit utilizing flame rectification includes a multidirectional roll-out probe 16 coupled to a microcontroller (U2) through an inverter (U3) to provide both fault both protection and fault identification. A condensate sensor (20) in the form of a conductive condensate sensor member is also coupled to the microcontroller (U2) through an inverter (U3) to detect the presence of condensate build-up.
摘要翻译： 电气控制显示适用于气体炉，其基于来自房间恒温器，限位开关，火焰探测器，火焰推出探头和冷凝物传感器的输入来控制风扇电动机，点火控制和气体阀。 利用火焰整流的推出检测电路包括通过逆变器（U3）耦合到微控制器（U2）的多向推出探头16，以同时提供故障保护和故障识别。 导电冷凝物传感器构件形式的冷凝物传感器（20）也通过逆变器（U3）耦合到微控制器（U2），以检测冷凝物积聚的存在。
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