公开(公告)号：US4975560A

公开(公告)日：1990-12-04

申请号：US403704

申请日：1989-09-06

申请人： Daher T. Wardy ,  Timothy H. Houle ,  Calvin O. Huber ,  James L. Chevalier

发明人： Daher T. Wardy ,  Timothy H. Houle ,  Calvin O. Huber ,  James L. Chevalier

IPC分类号： C23F13/02 ,  C23F13/04

CPC分类号： F24H9/0047 ,  C23F13/02 ,  C23F13/04

摘要： A common source of DC potential is utilized to simultaneously provide power to the protective anode in an electrically heated hot water heater and to the circuit used to bias the heating element jacket to reduce the current load the jacket would otherwise impose on the protective anode. By utilizing a common DC power source, the desired voltage relationship between the protective anode, the positively biased heating element jacket and negatively biased tank wall may be maintained, regardless of changes in the supply. The need for a second separate power supply is obviated and overall construction of the system substantially simplified. The DC power source may comprise a battery or rectified AC current from the power to the heating element.

摘要翻译： 利用DC电势的共同来源同时向电加热的热水加热器中的保护阳极提供电力，以及用于偏置加热元件护套的电路，以减少护套否则将施加在保护阳极上的电流负载。 通过利用公共直流电源，可以保持保护阳极，正偏置的加热元件护套和负偏压的罐壁之间的期望的电压关系，而不管电源的变化。 消除了对第二个单独电源的需要，并且系统的整体结构大大简化。 DC电源可以包括从电力到加热元件的电池或整流的AC电流。

公开(公告)号：US4972066A

公开(公告)日：1990-11-20

申请号：US403705

申请日：1989-09-06

申请人： Timothy H. Houle ,  Daher T. Wardy

发明人： Timothy H. Houle ,  Daher T. Wardy

IPC分类号： C23F13/02 ,  C23F13/04

CPC分类号： F24H9/0047 ,  C23F13/02 ,  C23F13/04

摘要： The adverse effects of the exposed metal jacket on a heating element in an electric water heater on the life and performance of a protective anode are eliminated or substantially reduced with the system that imposes a low voltage differential between the heating element jacket and the tank wall while simultaneously providing a low resistance current path which will provide a direct coductive path between the jacket and tank wall (at ground) in the event of an overvoltage condition. The system includes a potentiometer control which may be adjusted to provide the appropriate low voltage differential sufficient to substantially reduce the anode current. The relatively low resistance path allows an overvoltage current to pass readily to ground.

摘要翻译： 暴露的金属护套对电热水器中的加热元件对保护阳极的寿命和性能的不良影响被消除或显着减少，其中在加热元件护套和罐壁之间施加低电压差的系统，而 同时提供低电阻电流路径，其将在过电压状况的情况下在护套和罐壁之间（在地面处）提供直接的代码路径。 该系统包括电位器控制器，其可以被调整以提供足以基本上减少阳极电流的适当的低电压差。 相对较低的电阻路径允许过电压电流容易地通过接地。

公开(公告)号：US5023928A

公开(公告)日：1991-06-11

申请号：US400364

申请日：1989-08-30

申请人： Timothy H. Houle ,  Daher T. Wardy

发明人： Timothy H. Houle ,  Daher T. Wardy

IPC分类号： C23F13/00 ,  H05B3/82

CPC分类号： F24H9/0047 ,  C23F13/005 ,  H05B3/82

摘要： The sacrificial anode in an electrically-heated water heater is protected against excessive current drain and premature dissolution resulting from the cathodic effect of the metal jacket on the heating element by a protective device which provides an effective insulating separation between the jacket and the tank wall to eliminate current flow to the jacket from the protective anode, and a non-linear semiconductor between the jacket and the tank having a breakover voltage allowing it to become conducting at hazardous overvoltage levels. In one embodiment, the heating element jacket is separately insulated from the tank wall and a discrete semiconductor device is separately attached between the jacket and the tank to maintain the insulated condition unless an overvoltage condition occurs and to then become conducting to shunt to overvoltage current to the grounded tank wall. In another embodiment, a voltage breakdown material may be applied directly as the insulating layer between the heating element jacket and the tank wall. The material remains an insulator until it is caused to breakdown at an appropriate overvoltage level, where upon it becomes irreversibly conductive.

摘要翻译： 电热水加热器中的牺牲阳极被保护以防止由于金属护套在加热元件上的阴极效应而导致的过度的电流泄漏和保护装置的过早溶解，该保护装置提供了夹套和罐壁之间的有效绝缘分离， 消除来自保护阳极的电流到夹套的电流，以及夹套和罐之间的非线性半导体，具有允许其在危险的过电压电平下导通的中断电压。 在一个实施例中，加热元件护套与罐壁分开绝缘，并且分离式半导体器件分开地附接在护套和罐之间以保持绝缘状态，除非发生过电压状况，然后变为导通以分流到过电压电流 接地的箱壁。 在另一个实施例中，电压击穿材料可以直接施加在加热元件套和罐壁之间的绝缘层。 材料保持绝缘体，直到其以适当的过电压水平击穿，其中当其变得不可逆地导电时。