Portable ultrasonic instrument for lung detection

The invention relates to a portable ultrasonic instrument for lung detection. The portable ultrasonic instrument comprises a probe body, a housing and the like, and the upper part and the lower part of the probe body are respectively and fixedly connected with a housing. When the roller replaces the probe body to make contact with the skin of a patient and the silica gel roller rolls on the skin of the patient, scraping between the roller and the skin of the patient is reduced, the scraping line is tightly attached to the roller, and when the roller rotates, the scraping line scrapes dirt attached to the roller and then sucks the dirt into the confluence cavity to be collected, so that the situation that the dirt moves along with the roller and is transferred is avoided, and the service life of the roller is prolonged. And meanwhile, the heater rotates along with the wire shifting wheel, generated heat heats the scraping wire, so that residual paste dirt on the scraping wire is dried, then the scraping wire i