| 摘要 |
PROBLEM TO BE SOLVED: To improve monitoring capability of a combustion state at a heating boiler provided with a hollow cylindrical heat exchanging can body.SOLUTION: A heating boiler of this invention comprises: a pot burner 1 for igniting fuel; a hollow cylindrical heat exchanging can body 31 vertically installed, having an inner cylinder 33 with combustion gas of the pot burner 1 passing in it and an outer cylinder 34 arranged outside the inner cylinder 33, and formed with a space 37 for accepting heat medium between the inner cylinder 33 and the outer cylinder 34; and a flame rod 16 for detecting flame of the pot burner 1. The heat exchanging can body 31 is provided with an inlet 35 into which heat medium from a radiator flows and an outlet 36 for flowing out the heat medium toward the radiator, and the flame rod 16 is installed at a circumferential position different from a position just below the inlet 35 of the heat exchanging can body 31.SELECTED DRAWING: Figure 2 |
