Off-water shutdown protection mechanical heater

An off-water shutdown protection mechanical heater, comprising a tube and a cap mounted to an end of the tube,

• wherein the tube comprises, as being arranged in an interior thereof, an off-water protection transducer, a bidirectional triode thyristor (TRIAC), a circuit board that includes a bimetal plate, and a heating element, wherein the off-water protection transducer, the TRIAC, the bimetal plate, and the heating element are electrically connected in sequence to form a control loop;
• wherein when the off-water protection transducer detects a situation of being immersed in water, the TRIAC turns on to conduct electricity and the bimetal plate detects a temperature of water and undergoes deformation by the temperature to control the heating element to generate heat or not;
• and
• when the off-water protection transducer detects a situation of being removed out of water, the TRIAC turns off to cut off electricity, making the heating element not generating heat.