| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell, an electronic equipment or a camera wherein the used condition of fuel can be confirmed easily by vision. <P>SOLUTION: The fuel 40 in which water and bromothymol blue solution (BTB solution) are mixed in colorless and transparent and neutral methanol is housed in a fuel chamber 24. The fuel 40 is decomposed into hydrogen ion, electron, and carbon dioxide (CO<SB>2</SB>) by catalytic reaction at a fuel electrode 21. When the CO<SB>2</SB>discharged on the fuel chamber 24 side is dissolved into the water of the fuel 40, the fuel 40 colored in green (as shown in the upper right hatching) by the BTB solution is acidified and turns yellow (as shown in the upper left hatching). Because generated amount of the CO<SB>2</SB>is increased depending on the consumption of the fuel 40, the dissolved amount of the CO<SB>2</SB>is increased, and the degree of acidity is enhanced, and therefore the color of the fuel 40 is varied corresponding to the used amount of the fuel 40. That is, by confirming the color of the fuel 40 visually other than the liquid level of the fuel 40, the used amount of the fuel 40 can be grasped easily, and the convenience is improved. <P>COPYRIGHT: (C)2004,JPO |
