To store articles in a good state for a long period by keeping the humidity of the air constant in storing products of industrial semiconductor wafer and electronic parts, and commercial-off-the-shelf optical lens products of half-finished product and components, cleaning the storage by filling the atmospheric ion, and removing the charge by static electricity.
The air quality optimum for storing articles in the storage is realized by mounting a means for constantly keeping the humidity of the air in the storage and a means for releasing the atmospheric ion. A relative humidity in the storage is kept 40 % or less by the constant humidity keeping means, and the atmospheric ion is released into the storage by the atmospheric ion releasing means. The storage comprises a means having a heat source heating and regenerating a drying agent, and dehumidifying or/and humidifying the storage by opening and closing a shutter by expansion and contraction of a shape-memory alloy by heat of the heat source, and a means for releasing the atmospheric ion into the storage. The storage comprises a Peltier element having a low temperature-side heat radiation fin inside for condensing the vapor in the air of the storage to lower the humidity, and a high-temperature side heat radiation fin outside, a means for energizing the Peltier element, and the means for releasing the atmospheric ion into the storege.
SAKAI YUTAKA
USHIDA TADAICHI
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