To solve the problem that in a cultivation room, a carbon dioxide generator is indispensable for promoting photosynthesis of plants, while with respect to an apparatus that uses combustion gas, the emitted heat causes a temperature increase and a decrease in relative humidity associated with the temperature increase, thereby resulting in a great disadvantage to the cultivation environment.SOLUTION: In the atomizer provided with the combustion gas generator of the present invention and the two-fluid injection valve of gas and liquid, the emitted heat of the combustion gas to a cultivation room is absorbed by the heat of vaporization that occurs from the step of changing the liquid from the two-fluid injection valve into fine particles, in addition to the advantage of reducing the temperature rise in the cultivation room, carbon dioxide and water vapor can be quickly and uniformly diffused throughout the cultivation room.SELECTED DRAWING: Figure 1【課題】栽培室内において、炭酸ガス発生装置は、植物の光合成を促進させるために不可欠なものとなっているが、燃焼ガスを利用する装置に関しては、放出熱による温度上昇や温度上昇に伴う相対湿度の低下を生じ、栽培環境への不利益は大きい。【解決手段】本発明の燃焼ガス発生装置と気体と液体の２流体噴射弁とを備えた噴霧器では、燃焼ガスの栽培室内への放出熱を２流体噴射弁からの液体の細粒化から更に水蒸気に変化する過程から生じる気化熱が吸収し、栽培室の温度上昇を低減するという利点に加え、栽培室内全体に速やかに、一様に炭酸ガスや水蒸気を拡散させることができる。【選択図】図１
