Negative-pressure infrared combusting device

The invention relates to a negative-pressure infrared combusting device which comprises a combustor, a water storage chamber and a draught fan. The upper end of the interior of the water storage chamber is provided with a combusting chamber. The upper end of the combusting chamber is provided with the chamber, the lower end is communicated with an entry of the exterior draught fan through a fume passage, and the interior is provided with an electronic high-pressure igniting needle which is communicated with the exterior of the water storage chamber. The device is characterized in that the combustor consists of an air inlet elbow, an air door, a gas spray nozzle, an ejector, a mixing cavity, an infrared ray combusting ceramic plate and an outer casing; and the air door is arranged on the gas spray nozzle. The invention has the advantages that the combustor is arranged at the upper end of the water storage chamber, the negative-pressure combustion type is used, the flame type is flameless combustion of the infr