OXYGEN CONCENTRATION OR HUMIDITY CONTROLLING APPARATUS

摘要

An oxygen concentration controlling element where the shortest distance between the anode 1 and cathode 2 separated by a solid electrolyte film 3 is not larger than 50 mu m, to accelerate the back-diffusion of water generated in the cathode to the anode and dispense with a tank or a pump for supplying water to the anode. An oxygen concentration or humidity controlling apparatus where a photoelectric element 111 is disposed at an opening of a space 101 to be controlled to the atmospheric air and electric energy from the photoelectric element is accumulated in a secondary battery 112, thus realizing space-saving apparatus which can operate continuously even if the power is turned off, and a humidity controlling apparatus functioning both as a humidifier and as a dehumidifier.