Fire cover

Abstract

The invention discloses a fire cover which comprises a first cover plate and a second cover plate; a plurality of first fire holes are formed in the first cover plate; a plurality of second fire holesare formed in the second cover plate; the first cover plate covers the second cover plate; the diameter of each of the second fire holes is less than that of each of the first fire holes; and a plurality of second fire holes correspond to a single first fire hole. When the fire cover is at the small fire state, fuel gas penetrates through the second fire holes with smaller diameters and greater number for combustion, the fire hole strength is lower, and tempering is avoided when the fire cover is at the minimum fire power state; when the fire cover is at the big fire state, the fuel gas flowing at a high speed generates unstable flame relative to the second fire holes and is collected to the first fire holes with higher strength for combustion; the minimum value of the fire hole strengthis determined by the size of each of the second fire holes; the maximum value of the fire hole strength is determined by the size of each of the first fire holes; the interval of the adjustable fire power range of the fire cover is remarkably increased compared with that of the single-layer fire holes to fully meet the fire power adaptation under the condition of different fire powers.

Description

technical field [0001] The invention relates to the field of stove burners, in particular to a fire cover. Background technique [0002] On the fire cover of a common burner, a fire hole is formed by opening a hole. For the fire hole, when the burner is in a high fire state, the load of the fire hole increases, which will cause the strength of the fire hole to be too high, making the fire hole away from the flame. When the burner is in a low-fire state, the reduction of the fire hole load will cause the fire hole strength to be too low, causing the fire hole to backfire. [0003] Therefore, for the fire cover in the prior art, since the area of ​​the fire hole is determined, the range of the maximum adjustable firepower is also determined due to the limitation of the strength of the fire hole. In order to ensure that the firepower range of the burner is within a reasonable range, the inner The area of ​​the fire hole on the ring fire cover is usually limited to a specific s...

AI Technical Summary

Problems solved by technology

[0004] That is to say, by changing the size of the fire hole and then changing the fire hole area of ​​the fire cover, although the firepower of the maximum firepower and the minimum firepower can be changed, the interval size of the maximum adjustable firepower range cannot be changed.

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