Problem to be solved: to provide a CO2 supply device capable of suppressing the temperature rise in the cultivation room.CO2 supply device 1 isThe combustor 102 and the first heat exchanger 103, which are capable of adjusting the amount of combustion, are provided；Combustion gas containingThe heat source portion 10 cooled by heat exchange between the liquid flowing through the first heat exchanger 103 and the liquidA second heat exchanger 301 which circulates between the first heat exchanger 103 and the first heat exchangerA cooling fan 302 for cooling air to the second heat exchanger 301 is included.Heat sink 20 cooled by heat exchange with liquid flowing through second heat exchanger 301 andAn inlet temperature sensor 112 for detecting the temperature of the liquid flowing into the first heat exchanger 103 as an inlet temperature of the heat source partAn inlet temperature sensor 306 for detecting the temperature of the liquid flowing into the second heat exchanger 301 as an inlet temperature of the heat sink partControl section.The control section adjusts the amount of combustion of the combustor 102 based on the inlet temperature of the heat source portion, and controls the cooling fan 302 based on the inlet temperature of the heat radiating portion.Diagram【課題】栽培室内の温度上昇を抑制し得るＣＯ２供給装置を提供する。【解決手段】ＣＯ２供給装置１は、燃焼量が調整可能な燃焼器１０２と第１熱交換器１０３とを含み、ＣＯ２を含む燃焼ガスが、第１熱交換器１０３を流れる液体との間の熱交換により冷却される熱源部１０と、第１熱交換器１０３との間で液体が循環する第２熱交換器３０１と、第２熱交換器３０１に冷却風を送る冷却ファン３０２とを含み、第２熱交換器３０１を流れる液体との熱交換によって冷却する放熱部２０と、第１熱交換器１０３に流入する液体の温度を熱源部入口温度として検出する入口温度センサ１１２と、第２熱交換器３０１に流入する液体の温度を放熱部入口温度として検出する入口温度センサ３０６と、制御部と、を備える。制御部は、熱源部入口温度に基づいて燃焼器１０２の燃焼量を調整し、放熱部入口温度に基づいて冷却ファン３０２を制御する。【選択図】図２
