| 摘要 |
PROBLEM TO BE SOLVED: To provide a separatorless boiler, in which a desired degree of dryness can be obtained while the height of an upper header is suppressed and which has a small amount of holding water.SOLUTION: The boiler includes: a boiler body 20 configured in such a manner that when combustion using a burner 30 is stopped, a water level inside a water pipe 23 is lower than an upper end of the water pipe 23; an external water level detection means 50 that is in communication with an upper header 24 and a lower header 22 and detects a water level of the inside and outside of the boiler body; and a control means 100 to control the operation of a water supply means 70 to decrease a water level inside the boiler body 20 if a detected water level by the external water level detection means 50 reaches a first set water level. The boiler includes a header water level detection means 60 for detecting the water level that exists inside the upper header 24 because the boiler water inside the water pipes 23 is forced up by air bubbles produced by the boiling of the boiler water. If the water level detected by the header water level detection means 60 reaches a second set water level, the control means 100 controls the operation of the water supply means 70 to decrease a water level inside the boiler body 20. |
