| 摘要 |
A salt water activated emergency lighting device has a body, an anode electrode, a cathode electrode, a water supply module, a draining module and a light board. The body has a first compartment and a second compartment with a through hole therebetween. The anode electrode is mounted in the second compartment. The cathode electrode is mounted through a periphery of the second compartment. When the mains power is down, the water supply module unblocks the through hole, and salt water in the first compartment enters the second compartment. Salt water further reacts with the anode electrode and the cathode electrode in generation of power supplied to the light board for emergency lighting. When the mains power comes back, the through hole is blocked, and the draining module pumps the salt water in the second compartment back to the first compartment. Such cycling fulfills environmental protection without consuming electrode plates unnecessarily.
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