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1. (WO2018221084) CIRCUIT AND METHOD FOR ULTRAVIOLET LED DISCONNECTION DETECTION, WATER SAMPLING DISPENSER, AND PURE WATER PRODUCTION DEVICE

Pub. No.:    WO/2018/221084    International Application No.:    PCT/JP2018/016627
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Wed Apr 25 01:59:59 CEST 2018
IPC: G01R 31/02
C02F 1/32
Applicants: ORGANO CORPORATION
オルガノ株式会社
Inventors: HOSHINO Takafumi
星野 隆文
OZAKI Daisuke
尾崎 大介
OKABE Shuichi
岡部 修一
MATSUMURA Kyosuke
松村 杏助
HIDA Masataka
飛彈 正崇
Title: CIRCUIT AND METHOD FOR ULTRAVIOLET LED DISCONNECTION DETECTION, WATER SAMPLING DISPENSER, AND PURE WATER PRODUCTION DEVICE
Abstract:
A disconnection detection circuit that detects disconnection of an ultraviolet LED and has: a constant current power source that connects to an anode and cathode in the ultraviolet LED and supplies DC power to the ultraviolet LED; and a relay having an input unit connected in parallel between the anode and the cathode. The relay is operated by increase in voltage between the anode and the cathode, caused by disconnection of the ultraviolet LED, and the disconnection is detected.