Solar water heater vacuum tube protection device

The utility model discloses a solar water heater vacuum tube protection device, including the inside and outside temperature of vacuum tube detect and difference in temperature circuit, microprocessing circuit, liquid crystal display circuit, vacuum tube in temperature regulating circuit, the inside and outside temperature of vacuum tube detects and difference in temperature circuit connection microprocessing circuit, microprocessing circuit connects temperature regulating circuit in liquid crystal display circuit, the vacuum tube respectively, enables the inside and outside difference in temperature of vacuum tube and keeps in security range, avoids the vacuum tube to burst. The utility model discloses simple structure adopts the model to be DS18B20's the inside and outside temperature ofsensor real -time detection vacuum tube to the output difference in temperature signal and the threshold value difference in temperature arrive the singlechip, and the singlechip shows difference intemperature information th