The self-cleaning type
ultraviolet disinfection device comprises a device body, an
ultraviolet lamp tube, a reflecting cover, a cleaning
system and a safety
protection system, a water inlet is formed in the left side of the device body, a water outlet is formed in the right side of the device body, and the cleaning
system comprises an electric track and a mechanical cleaning accessory connected with the electric track in a sliding mode. The mechanical cleaning accessory comprises a U-shaped
brush inner shaft and a
brush sleeve, a cleaning
nozzle is further arranged on the
brush inner shaft, a detection sensor is further installed on the inner side of the device body, and when it is detected that
dirt on the
ultraviolet lamp tube reaches a threshold value, a self-cleaning program is automatically operated; the safety
protection system comprises a safety protection cover, namely a shell of the device main body, an ultraviolet leakage
detector, a perspective window and an ultraviolet
safety control center; and when ultraviolet leakage is detected, the ultraviolet lamp tube is automatically powered off. According to the utility model, the ultraviolet lamp tube can be timely and effectively cleaned, the ultraviolet disinfection efficiency is improved, the
energy consumption of equipment is reduced, and the danger caused by ultraviolet leakage is avoided.