US Patent 10571118 Dual fuel tank spiral flame combustion device

A combustion device includes a candle wick and a flow guiding assembly. The flow guiding assembly includes a support, a plurality of guide vanes secured to the support, a first shield member fixed at a side of the support, and a second shield member pivotally connected to the first shield member. The second shield member is pivotable in relation to the first shield member between a closed position and an open position to selectively form a gap. The plurality of guide vanes is disposed between the first and second shield members. The candle wick is disposed between the plurality of guide vanes. Therefore, the combustion device is easy to use by the above structure.