Ultraviolet irradiation head and ultraviolet irradiation a direction

摘要

A heat sink 25 is thermally connected with a substrate 24, on the leds - elements 20 are mounted. A blower unit 28 is placed close to the distal end of a bolts 25b of the heat sink 25 arranged. A ventilation opening 30a is formed in a housing 21, in order to the base end of the bolts in a direction to completely clear 25b, 25c are aligned in the ribs. The heat sink 25 is configured in such a way that a gap 25d between the ribs 25c in a portion of essentially is blocked, except where the vent opening 30a is present. The gap 25d is an opening, which are located in a widthwise direction perpendicular to the direction in which the ribs are aligned 25c. A space between the distal end of the bolts 25b and the blower unit 28 functions as a pressure chamber 31 which, in a pressurized state or a state which is under reduced pressure is set by means of cooling air which flows from the blower unit 28.