公开(公告)号：US4216411A

公开(公告)日：1980-08-05

申请号：US931872

申请日：1978-08-08

申请人： Gordon F. Ehret ,  William N. Rowley ,  Hermenegildo Espiritu

发明人： Gordon F. Ehret ,  William N. Rowley ,  Hermenegildo Espiritu

IPC分类号： F21S8/00 ,  F21V25/04 ,  H05B37/03 ,  H05B37/02

CPC分类号： F21S8/00 ,  F21V25/04 ,  H05B37/03 ,  F21W2131/401 ,  Y10S362/802 ,  Y10T307/773 ,  Y10T307/779

摘要： A wet-niche type lamp for providing underwater illumination in a swimming pool or the like includes an over-temperature protection circuit which interrupts the supply of electrical energy to the lamp when the level of the cooling water surrounding the lamp drops below a predetermined level. The circuit includes thermistor mounted in an heat exchange relationship with the surrounding water so that heat energy generated in the thermistor, as a consequence of the current flow through it, is normally transferred to the surrounding water. Should the level of the surrounding water drop below that of the thermistor, the thermistor heat energy quickly evaporates any remaining water film on the exterior surface of the thermistor to allow its temperature to rise. The control circuit, in response to the temperature increase, interrupts the flow of electrical energy to the lamp to prevent over-temperature operation.

摘要翻译： 用于在游泳池等中提供水下照明的湿式小型灯包括当灯的周围的冷却水的水平低于预定水平时中断对灯的电能供应的过热保护电路。 该电路包括以与周围水的热交换关系安装的热敏电阻，使得由于电流流过热敏电阻而产生的热能通常传递到周围的水。 如果周围水位低于热敏电阻的水平面，热敏电阻的热能将迅速蒸发热敏电阻外表面上的剩余水膜，使其温度升高。 控制电路响应于温度上升，中断了向灯的电能的流动，以防止过热操作。