PROBLEM TO BE SOLVED: To provide a carbon dioxide supply device capable of suppressing temperature rise in an agriculture facility and promoting growth of crops.SOLUTION: A carbon dioxide supply device comprises: a combustion chamber 12 disposed on an air supply path 10 which is connected to inside of an agriculture facility 50 a heat exchanger 3 whose one heat exchange passage 13 is disposed on the air supply path 10 which is at a downstream side of the combustion chamber 12 an air supply blower 11 disposed on the air supply path 10 and flowing air to the air supply path 10 and an exhaust air blower 21 which is connected to the other heat exchange passage 13 which is disposed so as to exchange heat with the one heat exchange passage 13 of the heat exchanger 3, and flows air to the other heat exchange passage 23. The air containing combustion exhaust gas generated in the combustion chamber 12 is cooled by exchanging heat with air flowing in the other heat exchange passage 23 on the heat exchanger 3, and is supplied into the agriculture facility 50. Therefore, temperature rise in the facility 50 is suppressed and density of carbon dioxide in the facility 50 can be enhanced.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】農事用施設内の温度上昇を抑制しつつ二酸化炭素の濃度を高めて農作物の促成等を図ることができる二酸化炭素供給装置を提供する。【解決手段】農事用施設50の内部につながる給気経路10に設けられる燃焼器12と、燃焼器12の下流となる給気経路10に一方の熱交換通路13が介装される熱交換器3と、給気経路10に設けられて給気経路10に空気を流す給気用送風機11と、熱交換器3の一方の熱交換通路13と交熱的に設けられる他方の熱交換通路13につながり他方の熱交換通路23に空気を流す排気用送風機21と、を有し、燃焼器12で発生する燃焼排気ガスを含む空気を、熱交換器3において他方の熱交換通路23を流れる空気と熱交換させて冷却し、農事用施設50の内部に供給する。これにより、施設50内の温度上昇を抑えつつ施設50内の二酸化炭素の濃度を高めることができる。【選択図】図2
