PROBLEM TO BE SOLVED: To provide a cooling apparatus for cooling the inside of a greenhouse for cultivating plants by spraying micro mist, when it is superheated.SOLUTION: An intake blower with a nozzle is installed at least one side out of the lower part and the middle high part of the greenhouse. The outlet side of the intake blower locating inside of the greenhouse is brought to be lateral when it is installed to the lower part, while it is brought to be inclined downward when it is installed to the middle high part. The nozzle is attached to the outlet side and spraying is carried out into the greenhouse from the nozzle, and at the same time, the spraying is put on an air blow discharged from the intake blower, while an exhaust blower for exhausting air in the greenhouse to the outside is installed to the upper part of the greenhouse, and the relative positional relation of the intake blower with the nozzle to be installed to the inside of the greenhouse and the exhaust blower to be installed to the upper part of the greenhouse is set so that the spraying from the nozzle can circulate inside of the greenhouse.【課題】植物栽培用の温室内が過熱された時に微霧を噴霧して冷房する冷房装置を提供する。【解決手段】ノズル付きの吸気用送風機を温室内の下部と中高部の少なくとも一方に設置し、前記吸気用送風機の温室内に位置する吐出側は、前記下部に設置する場合は横向きとするとともに中高部に設置する場合は斜め下向きとし、該吐出側にノズルを取り付け、該ノズルから温室内に噴霧させると共に該噴霧を前記吸気用送風機から吐出する送風に乗せる一方、前記温室内の空気を外部に排気する排気用送風機を前記温室の上部に設置し、前記温室内に設置する前記ノズル付き吸気用送風機と上部に設置する前記排気用送風機との相対位置関係を、前記ノズルからの噴霧が前記温室内を循環するように設置していることを特徴とする。【選択図】図２
