| 摘要 |
This gas-fired boiler (1) that includes a premix burner (3) is equipped with: a blower (5) that supplies combustion air to the burner (3), and a gas drawing mechanism (6) that is provided to a suction port (9a) of the blower (5). The gas drawing mechanism (6) is configured to include a venturi tube (10), draws out gas from a gas supply path (13) as air is suctioned towards the suction port (9a) of the blower (5), and feeds the gas, together with the air, to the suction port (9a). The gas is drawn into the gas drawing mechanism (6) using the suction of the air towards the blower (5), and thus a desired amount of gas can be supplied to the burner (3) even when the gas supply pressure is comparatively low. |
