| 摘要 |
PROBLEM TO BE SOLVED: To cool nutritious liquid after heating sterilization to a normal temperature level without increasing power consumption, and prevent the inside of a cultivation room from becoming unnecessarily highly humid without making an air conditioner perform a reheating dehumidifying operation.SOLUTION: Cultivation containers (11), illumination devices and an air conditioner (20) are installed in a cultivation room (3) of a plant factory (1), and a nutritious liquid circulating system (30) is provided which supplies nutritious liquid to plants (15) housed in the cultivation containers (11) and recovers residual nutritious liquid to supply again to the plants. A heating sterilizer (46) which heats to sterilize the recovered nutritious liquid is disposed on a circulation path (33) that returns the recovered nutritious liquid to a supply side. Furthermore, the circulation path (33) on a subsequent stage of the heating sterilizer (46) is extended to the cultivation room (3), and a radiator (47) is provided at a portion extended to the cultivation room (3). |
