Flame hole unit structure of a gas burner

Abstract

A gas burner for simplifying assembling and manufacturing of a burner flame hole unit by overlapping plates. Portions of the plates are cut so that the cut portions communicate with each other. Flame holes and mixture channels for a mixture of gas and air pass through a gap between the cut portions. The cut portions overlap and communicate with each other between adjacent plates, thereby forming flame holes and channels for flow of the mixture of gas and air through gaps between the cut portions.

Description

TECHNICAL FIELD[0001]The present invention relates to a flame hole unit structure of a gas burner, and more particularly, to a flame hole unit structure of a gas burner in which a structure of a burner flame hole unit can be simplified and the unit can be easily assembled and manufactured by overlapping cut portions of a plurality of partially-cut plates to cross each other to form a mixed gas (gas and air) flow path and a flame hole through a gap between the cut portions.BACKGROUND ART[0002]In general, a gas burner used in a combustion device such as a boiler or a water heater may be classified as a Bunsen burner or a pre-mixed burner according to a method of mixing a combustion gas with air.[0003]The Bunsen burner is a burner that supplies a minimum of primary air required for combustion in a nozzle unit through which a gas is injected, and supplies excessive secondary air to a portion at which a flame is formed, realizing perfect combustion, and has an advantage of good combustio...

AI Technical Summary

Benefits of technology

[0018]According to the flame hole unit structure of the gas burner of the present invention, a plurality of partially-cut plates overlap to form the burner flame hole unit so that a structure of the burner flame hole unit can be simplified and the structure can be easily manufactured, and thus, time and cost consumed for manufacture of the gas burner can be reduced.

[0019]In addition, according to the present invention, as the moving path of the mixed gas and the structure in communication with the flame holes are formed in the gap between the overlapping plates, a deformation level of the flame holes due to thermal stress can be reduced to increase stability of the flame and prevent imperfect combustion.

Problems solved by technology

While the conventional burner flame hole unit 10 has a structure in which flame holes are punched in one plate having a flat or cylindrical shape, such a structure may cause imperfect combustion and backfire when a combustion surface of the burner is deformed or, in a severe case, damage to the flame holes occurs due to thermal stress.

However, according to the flame hole unit structure formed of the metal fiber mat or the ceramic plate, a material cost is increased and a manufacturing method is complicated, which increases a manufacturing cost, and a structure of a pre-mixer is complicated, which increase a pressure loss so that a flame becomes unstable and noises occur.

In addition, when the metal fiber mat manufactured through weaving is used as a material for the flame hole unit, since an operator pulls and assembles the metal fiber mat upon assembly of the burner, irregular sizes of the flame holes in a local area or the entire area of the metal fiber mat may cause imperfect combustion and backfire, and flexibility in material characteristics of the metal fiber mat may cause sagging after installation, irregularly deforming the combustion surface and the flame holes.

Further, in the case in which the ceramic plate manufactured through the sintering method is used as a material for the flame hole unit, when condensation water generated from a heat exchanger upon upward combustion is dropped on the combustion surface, a surface of the flame hole unit may be damaged due to water to generate the flame holes having irregular shapes, increasing probability of generation of imperfect combustion.

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