Self-cleaning thermal flowmeter

The invention relates to a self-cleaning thermal flow meter, and belongs to the field of flow meters, the self-cleaning thermal flow meter comprises a transversely arranged pipeline, a fixing rod vertically penetrates through the upper wall of the pipeline in a sliding manner, a display device is transversely and fixedly mounted at the upper end of the fixing rod, and a temperature sensor arranged in the pipeline is fixedly mounted on the fixing rod; a motor is transversely and fixedly installed at the upper end of the fixing rod, a cleaning soft brush perpendicular to an output shaft of the motor is fixedly installed on the output shaft of the motor, the cleaning soft brush is in sliding fit with the outer side wall of the display device, a mounting block is fixedly installed on the upper wall of the pipeline, and two grooves are symmetrically formed in the middle of the mounting block; and a fixing piece in sliding fit with the inner side wall of the groove is transversely and fixedly installed on the outer