Abstract: In a memory unit 6, there is stored a correction table for each candidate value of an output set value of each of LED units 2. If UV rays have ever been emitted so far by the LED units 2, each of which is formed of a plurality of LED chips 8, then a PLC 5 acquires, upon setting of a output set value by an operation unit 53, a correction value corresponding to a cumulative emission time up to a previous emission, from the correction table of the output set value. Thereafter, the PLC 5 sets the magnitude of the power supplied to each of the LED units 2 using the acquired correction value. If an output set value different from a previous output set value is set, the PLC 5 obtains the correction value starting from the cumulative emission time upon modification. As a result, the UV irradiation apparatus enables power consumption necessary for emission of UV rays to be reduced, and UV ray output to be kept constant regardless of the cumulative emission time, even if the output set value is modified.

Abstract: In a memory unit 6, there is stored a correction table for each candidate value of an output set value of each of LED units 2. If UV rays have ever been emitted so far by the LED units 2, each of which is formed of a plurality of LED chips 8, then a PLC 5 acquires, upon setting of a output set value by an operation unit 53, a correction value corresponding to a cumulative emission time up to a previous emission, from the correction table of the output set value. Thereafter, the PLC 5 sets the magnitude of the power supplied to each of the LED units 2 using the acquired correction value. If an output set value different from a previous output set value is set, the PLC 5 obtains the correction value starting from the cumulative emission time upon modification. As a result, the UV irradiation apparatus enables power consumption necessary for emission of UV rays to be reduced, and UV ray output to be kept constant regardless of the cumulative emission time, even if the output set value is modified.

Abstract: A heatsink carries a UV-ray light emitting diode. Flow passages for causing circulation of a fluid that cools the UV-ray light emitting diode are opened in the heatsink. Supply ports and discharge ports are opened in a mount surface of a header where supply and discharge of the fluid for cooling purpose to and from the heatsink are performed. A pair of circulation orifices corresponding to the supply port and the discharge port are opened in the contact surface that contacts the mount surface in the heatsink. Recesses are formed around the respective circulation orifices, and an annular sealing member that exhibits rubber elasticity and that is compressed between the heatsink and the header is disposed in each of the recesses.

Abstract: A package has a base substrate that is a metal plate electrically connected to one electrode of a UV-ray light emitting diode and a cover substrate that is a metal plate electrically connected to the other electrode and that is stacked on the base substrate. A plurality of packages are mounted on a header such that center lines of the base substrates extending in their widthwise directions are aligned to each other. The cover substrates are arranged asymmetrical with respect to the longitudinal center line of the base substrates so as to traverse the center line. When mounted on the header, the packages are arranged such that positions of the cover substrates are staggered with respect to the center line. Moreover, the base substrate of one of the adjacent packages and the cover substrate of the other adjacent package are connected together by a connection plate fastened to the base substrates and the cover substrate by connection screws.

Abstract: A package has a base substrate that is a metal plate electrically connected to one electrode of a UV-ray light emitting diode and a cover substrate that is a metal plate electrically connected to the other electrode and that is stacked on the base substrate. A plurality of packages are mounted on a header such that center lines of the base substrates extending in their widthwise directions are aligned to each other. The cover substrates are arranged asymmetrical with respect to the longitudinal center line of the base substrates so as to traverse the center line. When mounted on the header, the packages are arranged such that positions of the cover substrates are staggered with respect to the center line. Moreover, the base substrate of one of the adjacent packages and the cover substrate of the other adjacent package are connected together by a connection plate fastened to the base substrates and the cover substrate by connection screws.

Abstract: A heatsink carries a UV-ray light emitting diode. Flow passages for causing circulation of a fluid that cools the UV-ray light emitting diode are opened in the heatsink. Supply ports and discharge ports are opened in a mount surface of a header where supply and discharge of the fluid for cooling purpose to and from the heatsink are performed. A pair of circulation orifices corresponding to the supply port and the discharge port are opened in the contact surface that contacts the mount surface in the heatsink. Recesses are formed around the respective circulation orifices, and an annular sealing member that exhibits rubber elasticity and that is compressed between the heatsink and the header is disposed in each of the recesses.