| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation interlocking system capable of being installed at a place of high infrared ray signal reception level, and confirming the lowering of the reception level when it is lowered. SOLUTION: A ventilating device 6 has a level detecting means 10 for detecting a light reception level of an infrared ray signal received by an infrared ray signal receiving means 7, a storing means 11 for storing the light reception level detected by the level detecting means 10, and a notifying means 13 for comparing the light reception level stored in the storing means 11 in advance with the light reception level newly detected by the level detecting means 10, and giving notification when the light reception level newly detected is smaller than the light reception level stored in the storing means 11 by more than a prescribed value. Thus the fact that the light reception level of the infrared ray signal is more than the prescribed value can be confirmed before installing the system, and the lowering of the light reception level of the infrared ray signal can be notified, when the light reception level is lowered during use. COPYRIGHT: (C)2007,JPO&INPIT
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