The invention discloses a medical salt mist measuring and control instrument and a salt mist concentration quantitative control method. A spiral feeding device comprises a tubular spiral conveying device installed on an atomization cup, a feeding bin, a stepping motor and a
gear system. A measuring and
control system comprises a single-
chip microcomputer, an air
pressure sensor, an air flow sensor, a controllable air flow valve, a stepping motor driver, an
infrared receiver, an interface circuit, an
infrared wireless keyboard, an LCD and the like. The spiral conveying device is driven and controlled by the stepping motor to convey salt
powder from the feeding bin to the atomization cup through a circular tube at the approximately-
constant speed, a jet-type atomization mode is adopted, salt mist with different flows and different concentrations is generated through feedback adjustment on air flow on the basis of
airflow air pressure information detection, the
powder can be conveyed in a quantitative mode at a
constant speed, the
powder conveying quantity can be adjusted at any time according to requirements,
compressed air flow is controllable and adjustable, operation and use are user-friendly, and the medical salt mist measuring and control instrument and the salt mist concentration quantitative control method can be applied to detection of and control over medical salt powder quantitative conveying and stable atomization.