| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a device for managing a gas residual quantity and a gas meter that can manage the gas residual quantity independently of a centralized control system. SOLUTION: The device for managing the gas residual quantity includes a means 10a-1 for totalizing a gas flow rate that totalizes the gas flow rate provided from a gas vessel 1 to a gas combustion apparatus 8 through a gas feeding pipe 5, a means 11 for operating the replacement of a vessel operated when replacing from an old gas vessel to a new gas vessel, a means 10a-2 for calculating for the predictive time of the next replacement that calculates the predictive time of the next replacement based on the past data of the gas flow rate by the means 10a-1 for totalizing the gas flow rate by operating the means 11 for operating the replacement of the vessel, and a means 13 for displaying that displays the predictive time of the next replacement calculated by the means 10a-2 for calculating for the predictive time of the next replacement.</p> |
