Disclosed is a gravity-based nanoscale fog type chemical liquid sprayer. The level of a chemical liquid in a chemical liquid container is usually maintained at a level not lower than a jet nozzle, so the chemical liquid is put into the jet nozzle by the gravity instead of a pressed air flow generated by an air compressor, and thus the chemical liquid is drawn into the jet nozzle without an output air pressure at the air compressor, and the output air pressure is used to only allow the chemical liquid, which is present in the jet nozzle, to spurt to the outside. Accordingly, the intensity of the chemical liquid jetted from the jet nozzle is significantly strong compared with the prior art, thereby reducing the operation time of the air compressor and significantly improving the efficiency of the output of the air compressor. In addition, vertical heights of a ventilation fan and a combined body of a jet duct and the jet nozzle can be changed, and the altitude angle with respect to the horizontal plane of the jet direction of the chemical liquid and the ventilation direction of the ventilation fan can be changed. The jet direction of the chemical liquid can be varied from side to side on the horizontal plane. Therefore, pest-control by the chemical liquid can be effectively performed on various crops with different heights using only a single model chemical liquid jetting device, and the chemical liquid jet range can be also widened compared with the prior art. In addition, the whole quantity of the chemical liquid that does not escape from the jet duct is collected and again fed back to the chemical liquid container, thereby minimizing the loss of the chemical liquid.COPYRIGHT KIPO 2016중력 이용식 나노 포그 약액 분무기가 개시된다. 약액통 내의 약액 레벨이 언제나 분사노즐 보다 낮지 않은 높이를 유지하도록 하여 약액이 에어컴프레서가 생성한 가압 기류에 의해서가 아니라 중력에 의해 분사노즐 속으로 투입되도록 함으로써, 에어컴프레서의 출력 공기압이 약액을 분사노즐로 끌어들이는 데 소모되지 않고 오로지 분사노즐 내에 존재하는 약액을 외부로 분출하는 데만 사용된다. 이에 의해, 분사노즐에서 약액이 분사되는 세기가 종래에 비해 훨씬 강하게 되고 에어컴프레서의 가동시간도 크게 줄일 수 있고, 에어컴
