Gas separation: apparatus – Apparatus for selective diffusion of gases – Plural separate barriers
Patent
1996-01-03
1997-09-09
Spitzer, Robert
Gas separation: apparatus
Apparatus for selective diffusion of gases
Plural separate barriers
96 10, 96 13, 55267, B01D 5322, B01D 5326
Patent
active
056651465
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a dehumidifier used to remove moisture from a moisture-proof, drip-proof container, and more particularly the invention is concerned in such a humidifier that houses electrical parts, etc. and is installed outdoors, basically without needing electric power or a chemical, to be replaced once it is saturated with moisture, or the like, on a long-term basis, while exerting a slow-acting dehumidifying effect.
BACKGROUND TECHNOLOGY
Conventional dehumidifiers known in the prior art include refrigerators equipped with compressors, refrigerant passages, etc., chemical desiccants, etc. although these apparatuses may work satisfactorily where they are installed appropriately for instruments, controlling, painting and other applicable uses, they have not been applied to such ordinary electric parts housing boxes that no fast-acting, absolute dehumidifying effect is required. With an aforementioned refrigerator, related capacity and cost do not meet at all. With a desiccant, a mass of the desiccant becomes considerably large for a long-term operation, regardless of the size of a housing box, etc., and in addition, maintenance may become laborious because of inspections for replacement timing and work.
With an electric parts housing box or the like, a simple moisture-proof, drip-proof structure is often incorporated, where a water-proof seal is installed at an opening/closing portion and a water-proof gland packing, etc. seals a bushing portion, instead of a dehumidifier using a refrigerator or a desiccant, and so on.
However, with such a moisture-proof, drip-proof structure as described above, once the concentration of moisture in the inside is higher than a limit, the structure may adversely affect dehumidifying, and even if the concentration of moisture in the atmosphere becomes lower than before, no dried state can be achieved, and in the extreme, dew may condense in the equipment, and if impurities contained in condensed dew make the equipment malfunction or break down the insulation, which is a fatal defect of a dehumidifier.
In these circumstances, an object of the present invention is to provide a novel dehumidifier free from the defects of a conventional dehumidifier known in the prior art, which can be used to dehumidify the interior of a hermetically sealed container or the like, with a moisture-proof, drip-proof structure, for a long time, basically without using electric power or a consumable chemical, while acting slowly using a simple, easy-operable construction.
Another object of the present invention is to offer such a dehumidifier as provided with low-cost auxiliary member materials that can support slow-acting dehumidifying, basically without using electric power or such a chemical or the like that must be replaced after the chemical is saturated with moisture.
DISCLOSURE OF THE INVENTION
A dehumidifier according to the invention is composed of a cylindrical body that is installed on a wall portion of a container and forms an air passage to communicate inner and outer portions of the container with each other, and a multi-layer, bottom-fitted cylindrical air-permeable body with a cylindrical wall which is made up, at least, of a water-proof film having moisture-permeable, penetrated microscopic holes, and by arranging the bottom-fitted cylindrical air-permeable body internally of the cylindrical body, the air passage is shielded in multiple stages, from the interior to the exterior of the container.
Thus, the air passage provided in the container can concentratedly activate breathing. Since the air passage is shielded with water-proof films in multiple stages, entry of water drops from the air passage into the container can be prevented effectively. The water-proof film is provided with penetrated microscopic holes that can pass moisture, so that the container can concentratedly breathe through the air passage. In this case, moisture particles move through the penetrated microscopic holes, from the atmosphere side, until the inner pressure of th
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patent: 4331460 (1982-05-01), Dillmann et al.
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