发明授权
- 专利标题： Resistive water sensor for hot tub spa heating element
- 专利标题（中）： 电热水传感器用于热水浴缸加热元件
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申请号： US09670293申请日： 2000-09-25
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公开(公告)号： US06476363B1公开(公告)日： 2002-11-05
- 发明人: Michel Authier , Benoit Laflamme , Christian Brochu
- 申请人： Michel Authier , Benoit Laflamme , Christian Brochu
- 主分类号： H05B102
- IPC分类号： H05B102
摘要：
A dry fire protection system for a spa and the spa's associated equipment. A heating element heats the spa's water. A resistive water level sensor senses that the level of water around the heating element is higher than a predetermined height or lower than a predetermined height, and a heating element deactivation device electrically deactivates the heating element when the water level around the heating element falls below a predetermined level. In a preferred embodiment, the heating element deactivation device is an electric circuit comprising a comparator circuit and a control circuit.