| 摘要 |
PURPOSE:To make it possible to detect a choked pipe from among the pipe network by a method wherein hot water is supplied into the pipe network and the distribution of temperature at the wall of each of the pipes of the pipe network is measured by an infrared ray camera. CONSTITUTION:When hot water is supplied instantaneously into the pipe network B comprising a plurality of cooling pipes, by opening and closing electromagnetic valves 8 and 9, the temperature of the wall of each of the cooling pipes which has been equal to the ambient temperature rises up to become close to the temperature of the hot water. In this case, the temperature of each of the cooling pipes is slower to rise when the pipe is choked than when it is not choked so that an uneven temperature distribution takes place through the walls of the pipes of the pipe network B in the direction of the row thereof and such uneven temperature distribution is measured by the infrared ray camera. |
