Ultraviolet irradiation head and ultraviolet irradiator
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United States of America Patent
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Nov 17, 2015
Grant Date -
Aug 6, 2015
app pub date -
Nov 18, 2014
filing date -
Feb 6, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A heat sink is thermally connected to a substrate on which LED elements are mounted. A fan unit is arranged near the distal end of a fin segment of the heat sink. A vent hole is formed in a case so as to expose the base end of the fin segment entirely in a direction in which fins are aligned. The heat sink is configured such that a gap between the fins is substantially blocked in a part except where the vent hole is present. The gap is an opening extending in a width direction perpendicular to the direction in which the fins are aligned. Space between the distal end of the fin segment and the fan unit functions as a pressure chamber that is placed in a positively pressurized condition or a negatively pressurized condition by cooling air traveling from the fan unit.
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