| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide placement in an optional position without causing problems of cost and installation space even when a carbon dioxide sensor changing with the lapse of time is applied. <P>SOLUTION: In the ventilation system, an operation state of a ventilating means 10 is controlled on the basis of a carbon dioxide concentration of a store 1 detected by the carbon dioxide sensor 30, it is provided with an operation control means 20 for forcibly operating the ventilation means 10 to purge an internal atmosphere of the store 1 by outside air during a preset time zone, and an output value of the carbon dioxide sensor 30 is corrected on the basis of an internal atmosphere of the store 1 room after carrying out forced operation. <P>COPYRIGHT: (C)2007,JPO&INPIT |
