| 摘要 |
PURPOSE: An agricultural greenhouse heating system for simultaneously supplying warm water and warm air is provided to maintain humidity inside a greenhouse and to gradually decrease the temperature therein when operation stops. CONSTITUTION: A water reserve tank(110) has a water reserving space inside. A heating unit(130) heats the water contained in the main water reserve tank. A warm water supply unit(150) supplies warm water through a warm water supply pipe and collects the supplied warm water back in the main water reserve tank. A subsidiary supply unit(170) mixes water with air and supplies the same. A steam production pipe(181) is formed for water and air which are supplied through the subsidiary supply unit to produce steam via the heating unit. A steam supply unit(190) supplies steam inside a greenhouse. A metal mold body(132) is formed in a metal mold shape with a smaller size than the water reserving space of the main water reserve tank so that the metal mold body can be submerged in the main water reserve tank. Heaters(134) are inserted into the metal mold body and are heated by supplied electricity and heat the metal mold body. |
