Abstract: Includes a low flow-rate region (R2) that is disposed on an upstream side of a combustion region (R1) within a second pipe (2), and that has a relatively slow flow-rate of combustion gas (G1) within the second pipe, and a flame kernel formation unit (3a) is disposed in the low flow-rate region.

Abstract: A reformer (5) which generates hydrogen-rich reformate gas by causing a catalytic reaction of fuel and air comprises a premixing chamber (12) for premixing the fuel with the air. High temperature air is supplied to the premixing chamber (12) from an air intake tube (13) via an orifice (14). A fuel injector (16) injects the fuel into the flow of the high temperature air in the premixing chamber (12) to generate fuel-air mixture. A homogenizing filter (17) homogenizes the composition of the fuel-air mixture in the premixing chamber (12) and supplies a uniform fuel-air mixture to a reforming catalyst (11).

Abstract: A delivery warmer comprises a catalytic combustion heat generating device, a container accommodating cooked food, and a container casing accommodating the container. In the catalytic combustion heat generating device, a fuel tank stores liquefied fuel gas. A nozzle section gasifies and injects the liquefied fuel gas. A combustion section introduces gas mixture of the gasified fuel gas and air, and causes a catalytic reaction for burning the gas mixture. An igniter ignites the gas mixture and commences the catalytic reaction. Thus, heat generated from the catalytic combustion heat device is used to warm the container accommodated in the container casing. The cooked food is kept warm and tasty for a long time.