The present invention provides a vertical air convection circulation promotion device that promotes up and down convection and circulation of hot air and low temperature air in a greenhouse, thereby reducing fuel costs and eliminating air stagnation due to temperature leveling. The longitudinal direction of the greenhouse is divided into a front area, an intermediate area, and a rear area, and a front fan 1 and a rear fan 2 are installed on the ceiling, and the low temperature of the lower part of the house sucked by the front fan 1 is set. The high temperature air on the ceiling is sucked a plurality of times with the discharge pressure of the air, and the high temperature air on the ceiling is sucked by the low temperature air supply circuit A that discharges to the buffer zone C in the intermediate area after mixing and stirring in each pipe and the rear fan 2 It is composed of a two-circuit system consisting of a high-temperature air supply circuit B that discharges after mixing and stirring with low-temperature air in the extended discharge pipes 10 at both ends of the lower part of the house. Is solved. [Selection] Figure 1【課題】ビニールハウス内の高温空気と低温空気の上下対流と循環を促して、温度の平準化による燃料費の削減と空気の澱みを解消する、上下空気対流循環促進装置を提供する。【解決手段】ビニールハウスの長手方向を前方域・中間域・後方域に区分けして、天井に前方送風機１と後方送風機２の２台を設置し、前記前方送風機１で吸引したハウス下部の低温空気の吐出圧で天井の高温空気を複数回吸引し、各管内で混合撹拌後に中間域の緩衝帯Ｃに吐出する低温空気供給回路Ａと、前記後方送風機２で天井の高温空気を吸引して、ハウス下部両側端の延長吐出管１０内で低温空気と混合撹拌後に吐出する高温空気供給回路Ｂの２回路方式で構成され、その同時運転の連続性を以てハウス内温度の平準化と空気の澱みを解消する。【選択図】図１
