| 摘要 |
PURPOSE:To simplify the field mounting operation of the titled apparatus, by providing a hydroponic solution tank with all the means necessary for hydroponic culture. CONSTITUTION:A hydroponic solution tank 7 is provided with all the means necessary for hydroponic culture, e.g. a heat-exchange pipe 27, a water-level sensor 56, a feed water ball tap 17, a liquid fertilizer injection port 52, a water- feeding port 12, a returning port 11, an aeration port 16, a pH sensor 54, a hydroponic solution concentration sensor 53 and a solution temperature sensor 55. The hydroponic solution tank 7 and the means necessary in the tank 7 can be handled as a single element in the construction site. |
