AUTOMATIC SUPPLYING SYSTEM OF NUTRIENT SOLUTION FOR CLOSED HYDROPONICS

摘要

PURPOSE: An automatic supplying system of a nutrient solution for closed hydroponics is provided, thereby stably recycle the nutrient solution, so that the costs for closed hydroponics can be decreased. CONSTITUTION: An automatic supplying system of a nutrient solution for closed hydroponics comprises a weather and environmental condition sensor(30, 31); multiple nutrient solution supplying motors(43); a nutrient solution mixing tank(60); a nutrient solution circulating piping; nutrient solution pH, electric conductivity(EC) and temperature sensors(32, 33, 34); a nutrient solution supplying motor(40); a supplied nutrient solution gauge(38); a nutrient solution discharging piping(54); a first discharged nutrient solution storage tank(61); a first nutrient solution discharging pump(41) which discharges the nutrient solution to the outside; a second discharged nutrient solution storage tank(62); a discharged nutrient solution gauge(39); a discharged nutrient solution supplying pump(42) which supplies the discharged nutrient solution to the nutrient solution mixing tank(60); a discharged nutrient solution supplying piping(52); a discharged nutrient solution electric conductivity sensor(35); multiple electric valves(55) opening/closing the supply of the nutrient solution and discharged nutrient solution; and a microprocessor controller(20).