| 摘要 |
The present invention relates to a switch between a power source and a heating device for automatically operating the heating device installed in freezing or low temperature damage areas in winter at a preset temperature condition without additional management or energy waste by using an automatic switch using the property of water that is frozen and expanded below zero degrees centigrade. [Reference numerals] (AA) Heating device; (BB); (CC) Power supply; (DD); (EE); (FF) |
