| 摘要 |
PURPOSE:To eliminate need of a separate heater and reduce operating cost of equipment for supplementing light by circulating water in a water tank in a shade of a double structure, absorbing waste heat of lamps and heating the interior of a space isolated with a mobile curtain. CONSTITUTION:A reflection shade 4 of each lamp 2 is provided with a double structure and water is circulated between a water tank 5 in the interior thereof and a heat exchanger 8 to reduce surface temperature of the reflection shade 4 and prevent a mobile curtain 11 from dissolving even if the curtain is brought near the lamp. The volume of a space covered with the mobile curtain is reduced and air heated with the heat exchanger 8 can be then delivered with a blowing fan 9 to increase the peripheral temperature of each plant 1. |
