| 摘要 |
PROBLEM TO BE SOLVED: To enable a water cooling tower to highly evenly spray water upon a wet/dry switching area by making the height of its water intake pipe adjustable and, in addition, to appropriately adjust the ratio between a normally wet area and the wet/dry switching area. SOLUTION: A water cooling tower cools warms water 7 by directly bringing the outside air into contact with the water 7. In this case, a packing material 12 is dividedly and alternately arranged in normally wet areas 17 and wet/dry switching areas 18 respectively isolated from external atmosphere 16, and all sprinkling ports 6 of a warm water tank 5 are communicated with the areas 17. At the position corresponding to the bottom face area 18 of the tank 5, a vertically expandable water intake pipe 25 composed of a fixed pipe 21 which is extended upward from its lower end section fixed through the bottom face of the tank 18 so that the pipe 21 may only be communicated with the area 18, a vertically moving pipe 23 which is vertically slidably put in the pipe 21 and has an opened water intake 22 at its upper end, and a vertical movement locking means 24 provided between the pipes 21 and 23, is arranged.
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