| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a forced circulation type solar heat collecting system dispensing with antifreeze solution as heat transfer liquid. <P>SOLUTION: An air tank 100 having a volume larger than the total of the volume of a circulation passage 16 in a collectors 20 and 22 is provided in a part extending in the direction of having a vertical component in the lower part of the lower end of the collectors 20 and 22 of a return passage 98 of the circulation passage 16. In a stopped state, the heat transfer liquid in the collectors 20 and 22 is stored in an air tank 100 and the collectors 20 and 22 insides are filled with the air of the air tank 100. In operating, the heat transfer liquid in the air tank 100 is fed to the collectors 20 and 22, circulated to warm the water and the floor, and the air in the collectors 20 and 22 is stored in the air tank. During the stopping of the operation, the air in the air tank 100 is moved upward in the return passage 98, the heat transfer liquid in the collectors 20 and 22 is moved inversely to the forced circulation so as to inflow in the air tank 100. In the non-circulation, there is no heat transfer liquid in the collectors 20 and 22 so as not to be frozen without using the antifreeze solution. <P>COPYRIGHT: (C)2004,JPO |
