Solar water heater water inlet pipe anti-blocking device suitable for karst region and dirt treatment method

The invention discloses a solar water heater water inlet pipe anti-blocking device suitable for a karst region and a dirt treatment method, and belongs to the drainage field. The device comprises a vertical pipeline connected with a water outlet of a reservoir, an inclined pipeline connected with the vertical pipeline, a horizontal pipeline connected with a water inlet of a water heater, an impeller device, a brush roll device, a first filtering device, a second filtering device, a storage device and a switch device. An included angle between the vertical pipeline and the inclined pipeline is0-90 degrees. The impeller device is lower than the lowermost position of an intersection of the vertical pipeline and the inclined pipeline, the brush roll device is lower than the impeller device, the first filtering device is located at the lowermost position of the vertical pipeline, the second filtering device is located in the inclined pipeline, and the storage device is connected with a bottom end of the vertical p