| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hydroponic device easily controlling a liquid temperature and easily uniforming the liquid temperature. <P>SOLUTION: This hydroponic device 1 includes a pressure dissolution part 31, a fix planting water tank 2 storing culture solution 91 from the pressure dissolution part 31, a temperature sensor 6 measuring the temperature of the culture solution 91 in the fix planting water tank 2, and a control part 7 changing the operating ratio of the pressure dissolution part 31 based on output from the temperature sensor 6. In the pressure dissolution part 31, air to the culture solution 91 is pressurized and dissolved by jetting the culture solution 91 into a mixing container 32 under a pressurized environment so as to rise the temperature of the culture solution 91. When the temperature of the culture solution 91 in the fix planting water tank 2 is lower than a fixed temperature, the pressure dissolution part 31 is continuously operated, and when the temperature is higher than a fixed temperature, the pressure dissolution part 31 is intermittently operated. Thus the operating ratio of a gas dissolution part 3 is changed so as to easily control the temperature of the culture solution 91 and easily uniform the temperature of the culture solution 91. <P>COPYRIGHT: (C)2013,JPO&INPIT |
