Abstract: A gas combustion device 1 comprises a combustor 11 for burning fuel gas supplied from a gas source, an air blower 15 for adjusting the amount of air in a cylindrical casing 5 which contains the combustor 11 therein; an ejector 7 with a primary air hole 37 for sucking a primary air into a gas passage leading from the gas source to the combustor 11 due to negative pressure caused by flow rate of the fuel gas supplied to the combustor 11 and an ignition device 9 for igniting mixed gas injected from a wick 39 provided ahead of the ejector 7. When fire is set to the mixed gas of the wick 39, ignitability of the mixed gas is improved by decreasing the amount of air in the casing. After ignition, combustion is maintained in the state where combustibility of the combustion gas in the combustor 11 is improved by increasing the amount of air in the casing 5.

Abstract: A gas combustion device 1 is provided with combustion chambers 11, 13 for burning gas supplied from a gas source therein and a combustor 7 with a combustion gas vent 37 for discharging combustion gas burnt in the combustion chambers. The combustion gas vent 37 is provided with a baffle member 41 for adjusting distribution of the combustion gas discharged from the combustion gas vent 37.

Abstract: A gas combustion device 1 has a combustor 7 for burning supplied combustion gas therein, an ejector 3 with a primary air hole for sucking a primary air due to ejector effect, and an ignitor 5 for igniting mixed gas injected from a wick 25 provided ahead of the ejector 3. The combustor 7 has a primary combustion chamber 11 for igniting and burning the mixed gas injected from the wick 25 therein, a secondary air hole 33 for supplying a secondary air to the gas burning after ignition, a secondary combustion chamber 13 for further burning the gas burnt in the primary combustion chamber 11 therein, and a tertiary air hole 35 for supplying a tertiary air to the gas burning in the secondary combustion chamber 13. Even when the amount of the primary air is increased, thereby improving ignitability of the mixed gas, since the secondary air is supplied to the gas after ignition in the primary combustion chamber 11, combustion performance of the gas is improved.

Abstract: A portable drier 1 includes a gas tank 25 in which fuel gas is stored, a combustor 11 combusting fuel gas supplied from the gas tank 25, a blower 17 through which air, heated in the combustor 11 is caused to flow to an outlet, a power supply rotating a motor 19 of the blower 17, and an ignition device 9 igniting fuel gas. The combustor 11 includes an ejector 7 for allowing primary air to be drawn due to a negative pressure created by a flow speed of fuel gas supplied from the gas tank 25. A mixture gas ejecting from a wick is combusted in a primary combustion chamber 55 to generate combustion gas, which is supplied to a secondary combustion chamber 57 in which combustion gas is mixed with secondary air for complete combustion.