Optic level sensing system for use in a refrigerator
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United States of America Patent
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Mar 5, 2002
Grant Date -
N/A
app pub date -
Jan 12, 2000
filing date -
Jan 12, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A system for protecting optical elements from moisture and/or ice build up when used in freezing environment, such as a freezer compartment of a refrigerator. The system includes a hood or sleeve which can be assembled to an optical element such as a light emitting or receiving elements used in a freezer compartment. The sleeve acts to trap air about the optic element such that warm humid air does not readily move into contact with the optic element. Moreover, the warm, humid air that does flow toward the optic element may be cooled by the sleeve such that moisture condenses out of the air and onto the sleeve. A heater may be provided adjacent the sleeve for heating the sleeve if the optic element is impaired due to ice or moisture build up.
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