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    • 3. 发明授权
    • Environmental control system incipient failure indicator apparatus
    • 环境控制系统初期故障指示仪
    • US06225907B1
    • 2001-05-01
    • US09312325
    • 1999-05-14
    • Andy Lynn DerryberryCosimo CaronnaDarryl Elliott Denton
    • Andy Lynn DerryberryCosimo CaronnaDarryl Elliott Denton
    • G08B1702
    • G05D23/1904F24F11/52
    • An incipient failure indication apparatus for an environmental control system which includes a heat exchanger through which air flows and a temperature control thermostat. The indication apparatus includes an indicator having an alarm in communication with a control board, the control board in communication with the thermostat. The alarm has a visual indicator and/or an aural indicator, whereby the attention of a person is attracted to the indicator upon activation of the alarm. A first temperature sensor is disposed on the upstream side of the heat exchanger and a second temperature sensor is disposed on the downstream side of the heat exchanger, whereby the temperature sensors respectively sense the temperature of the air upstream and downstream of the heat exchanger. The first and second temperature sensors are in communication with the control board, and the control board has means for comparing the temperatures sensed thereby. The control board also includes means for activating the alarm in response to recognizing a difference in temperatures sensed by the first and second temperature sensors which is one of greater than and less than a predetermined value. The apparatus may also be provided with a timer, a reset switch in communication therewith, a filter service time indicator, and means for activating the filter service time indicator a predetermined period measured by the timer after the reset switch is activated. The apparatus may also be provided with means for activating a remote alarm upon activation of the alarm, whereby persons outside of a building serviced by the environmental control system are notified of an incipient failure of the environmental control system.
    • 一种用于环境控制系统的初始故障指示装置,其包括空气流过的热交换器和温度控制恒温器。 指示装置包括具有与控制板通信的警报的指示器,控制板与恒温器通信。 警报器具有视觉指示器和/或听觉指示器,由此在激活警报器时,人的注意力被吸引到指示器。 第一温度传感器设置在热交换器的上游侧,第二温度传感器设置在热交换器的下游侧,由此温度传感器分别感测热交换器上游和下游的空气的温度。 第一和第二温度传感器与控制板通信,并且控制板具有用于比较由此感测的温度的装置。 控制板还包括用于响应于识别由第一和第二温度传感器感测到的温度差异大于或小于预定值的温度而启动报警的装置。 该设备还可以设置有定时器,与其通信的复位开关,过滤器服务时间指示器,以及用于在复位开关被激活之后由定时器测量的预定周期激活过滤器服务时间指示器的装置。 该装置还可以设置有用于在激活警报器时激活远程警报的装置,由环境控制系统服务的建筑物外的人被通知环境控制系统的初始故障。