Hot water heating system
    2.
    发明授权
    Hot water heating system 失效
    热水加热系统

    公开(公告)号:US3815813A

    公开(公告)日:1974-06-11

    申请号:US25715772

    申请日:1972-05-26

    申请人: SAUNIER DUVAL

    发明人: CHARRON J SAGNARD F

    摘要: In the hot water heating system disclosed herein, a sensing means such as a thermistor provides a first electrical control signal which represents deviation of outlet water temperature from preselected value and a flowmeter provides a pulsating electrical signal having a frequency which varies as a function of rate of flow through the heating system. An output signal is generated having a frequency equal to that of the pulsating signal and a squarewave pulse duration which varies as a function of the first control signal. Heater means are then energized by the output signal so as to provide a thermal input to the heating system which is substantially proportional to the product of water output temperature deviation and flow rate. This control minimizes output temperature fluctuations due to thermal inertia and heater lag.

    摘要翻译: 在本文公开的热水加热系统中,诸如热敏电阻的感测装置提供第一电气控制信号,其表示出口水温度与预选值的偏差,并且流量计提供具有随速率变化的频率的脉动电信号 流过加热系统。 产生具有等于脉动信号的频率的输出信号和作为第一控制信号的函数而变化的方波脉冲持续时间。 加热器装置然后由输出信号激励,以便向加热系统提供基本上与水输出温度偏差和流量的乘积成比例的热输入。 该控制使由于热惯性和加热器滞后引起的输出温度波动最小化。