PROBLEM TO BE SOLVED: To solve the problems: since mist trails long when only water spray takes place, dew condensation takes place without humidification inside an air conditioner； even when water spray takes place directly in the room, it is difficult to increase a humidity because of considerable humidity non-uniformity in a vaporization type and consequently air is humidified just a little at a low temperature； and when the air conditioner is stopped without drying the inside, a moldy smell easily comes out and scale deposits immediately and clogs a nozzle or a humidifying member in any case； and although the generation of scale or bacillus can be eliminated by a reverse osmosis membrane type demineralizer, since an amount of water required is three times a humidification amount and a service life of an active carbon filter is short, the running cost may increase.SOLUTION: Pure water from an injection nozzle 2 collides against a disc 4 through a semi-permeable film 7 by a high water pressure pump 8, so that fine mist containing a large quantity of colloid can be dispersed in a cross-sectional direction of an air stream. Therefore, the inside of a room can be kept at a uniform humidity. When spray water of pure water is reused by circulation, the quantity of water to be used is reduced and residual chlorine is released. Thus, the use of active carbon filter is eliminated, so that the system is made maintenance-free.【課題】水を噴射するだけでは霧が長く棚引くので空調機内では加湿せずにドレンしてしまう。室内に直接噴霧しても、湿度ムラが大きく高湿度にすることは困難。気化式は温度が低いと僅かしか加湿せず、内部を乾かさずに止めるとカビ臭が出易い。また、いずれもノズルや加湿材にスケールが直ぐ析出し詰まる。逆浸透膜式純水器でスケール・菌の発生を無くせるが、加湿量の３倍も水量が必要で、活性炭フィルターも寿命が短いので、維持費が高くなる。【解決手段】高水圧ポンプ８で、半透膜７を介して、噴射ノズル２から円盤４に純水を衝突させれば、多量のコロイドを含む微細霧を風流の断面方向に拡散できるので、室内を均一な湿度にでき、純水の噴霧水を循環使用すれば、使用水量が少ない上、残留塩素が抜けて、活性炭フィルターが不要となりメンテナンスフリーとなる。【選択図】 図１
