公开(公告)号：US4380155A

公开(公告)日：1983-04-19

申请号：US238521

申请日：1981-02-26

申请人： Stephen W. Paddock ,  Andrew T. Tershak

发明人： Stephen W. Paddock ,  Andrew T. Tershak

IPC分类号： F25D17/06 ,  G01K3/04 ,  G05D23/24 ,  F25B1/00 ,  G01K7/02

CPC分类号： G01K3/04 ,  F25D17/062 ,  G05D23/1909 ,  G05D23/24

摘要： A refrigerator includes a compressor, a condenser, an evaporator, an evaporator fan and a temperature sensing circuit which includes a thermistor located to sense the average temperature of the cabinet air and a potentiometer manually adjustable to a desired temperature set point. The temperature sensing circuit also includes a first comparator stage which indicates whether the average temperature of the cabinet air is above or below a first value, the first comparator having little or no hysteresis in its response so that small changes in temperature can be detected. A second comparator stage indicates whether a signal at its input is greater or less than a second value, the second comparator stage having substantial hysteresis in its response to provide high noise immunity. An integrator is interposed between the first comparator stage and the second comparator stage to further enhance noise suppression.

摘要翻译： 冰箱包括压缩机，冷凝器，蒸发器，蒸发器风扇和温度感测电路，其包括位于感测柜体空气的平均温度的热敏电阻和可手动调节到期望的温度设定点的电位计。 温度检测电路还包括第一比较器级，其指示机柜空气的平均温度是高于还是低于第一值，第一比较器在其响应中具有很小的或没有迟滞，从而可以检测到温度的微小变化。 第二比较器级指示其输入端的信号是否大于或小于第二值，第二比较器级在其响应中具有实质的迟滞以提供高抗噪声能力。 积分器插入在第一比较器级和第二比较器级之间，以进一步增强噪声抑制。