Fire cover and combustor using same

Abstract

The invention relates to a fire cover, and further relates to a combustor. The fire cover comprises a top cover and an annular wall extending downwards in the circumferential direction of the top cover. Fire holes are formed in the annular wall. A main ignition hole is formed in a position, corresponding to an ignition needle, in the annular wall. The aperture of the radial inner end of the main ignition hole is smaller than the aperture of the radial outer end of the main ignition hole. According to the fire cover, a better flame stabilizing effect can be played when ignition is conducted, and the success rate of ignition is greatly improved. The combustor comprises a base, an ejection guiding pipe, an ignition needle and a thermocouple. The base is provided with an outer ring gas mixingchamber and an inner ring gas mixing chamber which communicate with the ejection guiding pipe. An outer ring fire cover is arranged on the outer ring gas mixing chamber in a matched mode. The ignitionneedle and the thermocouple are close to the inner ring gas mixing chamber and are arranged on the periphery of the inner ring gas mixing chamber. An inner ring fire cover is arranged on the inner ring gas mixing chamber in a matched mode. The fire cover is adopted as the inner ring fire cover. The combustor is higher in ignition success rate, working reliability and stability, and the service life is effectively prolonged.

Description

technical field

[0001] The invention relates to an anti-blocking and flame-stabilizing fire cover, and also relates to a burner using the fire cover. Background technique

[0002] Blockage of the fire hole is the main fault problem of the cooker burner. The blockage of the fire hole will affect the ignition, fire protection, flame stability, etc. Compared with the outer ring, the fire hole of the inner ring is more likely to be blocked. In addition, the current cooker is generally ignited and kept in the inner ring, that is, the thermocouple and the ignition needle are generally arranged in the inner ring, such as the Chinese utility model patent "A A high-efficiency burner" has this structure. When the inner ring of the burner blocks the fire hole, it will affect the ignition and fire protection on the one hand, and on the other hand, the soup and oil will damage the thermocouple and ignition needle Even and ignition needle, affect the service life. At present, the struct...

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