The present invention relates to a nutrient solution supply system which uses an inverter. The nutrient solution supply system comprises: a liquid-manure tank a liquid oxygen tank a raw water tank which has a first pump a mixing tank which is connected with a second pump having a filter, a first return pump having a level sensor and connected with the first pump, each of the control valves of the liquid-manure tank and the liquid oxygen tank, and the first pump of the raw water tank a stirrer a heating means which is a hot wire band that is provided on the outer circumferential surface of the mixing tank a nutrient solution cultivating tank which comprises a main body part having an open upper side, an external casing having an outlet hole formed in the lower part of the main body part, a combining part combined with both upper end parts of the external casing, a plant fixing member installed in at least one penetration hole formed on the upper side, a body part forming a space by being formed to be integrated with the upper side in a lower direction, and multiple internal casings having at least one water flow hole formed in the upper side of the body part a nutrient solution supply path which connects the second pump with the internal casing a second return flow path which connects the outlet hole with the mixing tank and a control box which controls the control valves, the pumps, the level sensor, the stirrer, and the heating means. The present invention is able to control the optimal rotation speed of a pump and the flow control of nutrient solution by using an inverter and materials which are inputted from a pressure gauge and the level sensor.COPYRIGHT KIPO 2014본 발명은 인버터를 이용한 양액 공급시스템에 관한 것으로, 액비 탱크와 액산 탱크와 제 1 펌프를 갖는 원수 탱크와 필터가 구비된 제 2 펌프와, 레벨 센서가 구비되어 있으며 상기 제 1 펌프와 연통된 제 1 리턴 펌프와, 상기 액비 탱크와 상기 액산 탱크의 각 제어 밸브 및 상기 원수 탱크의 제 1 펌프와 연통된 혼합 탱크와 교반기와 상기 혼합 탱크의 외주면에 제공된 열선 밴드인 히팅 수단과 상부면이 개방된 몸체부와, 상기 몸체부의 하부면에 형성된 출수구를 갖는 외부 케이싱과, 상기 외부 케이싱의 상부 양단부에 결합된 결합부와, 상부면에
