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    • 43. 发明申请
    • Control System For Modulating Water Heater
    • 调温热水器控制系统
    • US20090064944A1
    • 2009-03-12
    • US12266777
    • 2008-11-07
    • John C. Paine
    • John C. Paine
    • F24H9/20F24H9/00
    • F24H9/2035F23N1/082F23N2041/04F24D19/1009F24D2200/043Y02B30/108
    • A control system is provided for a modulated heating system including at least one modulating water heater and a controller. A deadband control scheme provides for reduced cycling of the modulating heater when total system heat demand falls between the maximum output of one heater and the sum of the maximum output of that one point and the minimum firing point of the next subsequent heater. Condensation of flue gas products is prevented by monitoring flue exhaust temperature for each heater and controlling the modulation of each heater to maintain a minimum heater output sufficiently high to prevent condensation of flue gas products from that heater. Rapid reaction to changes in system heat demand is provided by sensing changes in flow rate in a primary loop of the system and anticipating resulting changes in temperature thus allowing for change in heater output prior to the time the change in flow rate has fully impacted system temperature.
    • 为包括至少一个调制热水器和控制器的调制加热系统提供控制系统。 死区控制方案提供了当总系统热量需求落在一个加热器的最大输出和该一点的最大输出和下一个后续加热器的最小点火之和之间时调节加热器的循环减少。 通过监测每个加热器的烟道排气温度并控制每个加热器的调节以防止烟道气产品的冷凝,以保持足够高的最小加热器输出,以防止来自加热器的烟道气产品的冷凝。 通过检测系统初级回路中流速的变化并预测温度的变化,从而提高对系统热量需求变化的快速反应,从而允许在流量变化完全影响系统温度的时间之前改变加热器输出 。