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    • 25. 发明授权
    • Diagnostic system for detecting faulty sensors in a refrigeration system
    • 用于检测制冷系统中故障传感器的诊断系统
    • US4653280A
    • 1987-03-31
    • US777384
    • 1985-09-18
    • John C. HansenHarold B. GinderLloyd A. Johnson
    • John C. HansenHarold B. GinderLloyd A. Johnson
    • F24F11/02F25B49/00F25B49/02G05B9/02
    • F25B49/005G05B9/02
    • When sensors are employed to monitor different operating variables or parameters in a refrigeration system, the sensor outputs will normally have predetermined known relationships with respect to each other as long as the sensors are functioning properly and regardless of the operating condition of the refrigeration system. By comparing the output of one sensor relative to that of another sensor, a faulty condition of either of those two sensors may be detected. For example, during stabilized system operation the output of a condenser pressure sensor should always indicate a higher pressure than that reflected by the output of an evaporator pressure sensor. By effectively subtracting the evaporator pressure from the condenser pressure, a faulty sensor may be discovered. If the result of the subtraction is zero or negative, at least one of the pressure sensors is defective. When a faulty sensor is detected, a warning message is displayed to operating personnel.
    • 当使用传感器来监视制冷系统中的不同操作变量或参数时,只要传感器正常工作并且与制冷系统的操作条件无关,传感器输出通常将具有相对于彼此的预定已知关系。 通过比较一个传感器相对于另一个传感器的输出,可以检测这两个传感器中的任一个的故障状态。 例如,在稳定的系统操作期间,冷凝器压力传感器的输出应始终表示比由蒸发器压力传感器的输出反映的压力更高的压力。 通过从冷凝器压力有效地减去蒸发器压力,可能会发现有故障的传感器。 如果减法的结果为零或为负,至少有一个压力传感器有缺陷。 检测到故障传感器时,向操作人员显示警告信息。
    • 26. 发明授权
    • Releasable gripper assembly for a jacking mechanism
    • 用于顶升机构的可释放的夹具组件
    • US4030698A
    • 1977-06-21
    • US672628
    • 1976-03-31
    • John H. Hansen
    • John H. Hansen
    • B66F1/08
    • A jack assembly for use in raising and lowering large platforms on columns, caissons and the like, having upper and lower annular portions interconnected by hydraulic motor means for relative vertical movement therebetween and a plurality of arcuate pneumatically operated gripper assemblies in both the upper and lower portions of the jack; each of the gripper assemblies being removably replaceable from its position in the jack assembly without removal of the jack assembly from the caisson which it surrounds.
    • 用于升高和降低立柱,沉箱等上的大平台的千斤顶组件,具有通过液压马达装置相互连接的上部和下部环形部分,用于在其间进行相对的垂直运动,以及在上部和下部两个中的多个弧形气动操作的夹持器组件 千斤顶的部分; 每个夹持器组件可从其位于千斤顶组件中的位置可移除地替换,而不会将千斤顶组件从其围绕的沉箱移除。