| 摘要 |
PURPOSE: A device to mix gas and air for a combusting device is provided to enhance a turndown ratio by controlling the amount of the gas and the air and to apply a solenoid valve having excellent durability and in which a driving time is very short. CONSTITUTION: A device to mix gas and air for a combusting device comprises a housing (300), a first air supply unit (210), a first gas supply unit (230), a second air supply unit (220), a second gas supply unit (240), and an opening or closing member (400). The housing is divided to a first flow path (310) and a second flow path (320). The opening or closing member blocks the flow of the air and the gas supplied from the second air supply unit and the second gas supply unit in a low power mode. The opening or closing member opens the second air supply unit and the second gas supply unit in a high power mode. [Reference numerals] (AA) First air; (BB) First gas |
