Master and auxiliary combustion device

Abstract

The invention aims to prevent narrowing of a slit burner port due to thermal expansion of a master burner cap, and to prevent deterioration of fire spreading performance in a concentric burner opened with the slit burner port 10g extending in a radial direction for fire spreading between a master burner port and a slave burner port in an upper wall part of the master burner cap 10. The slit burner port 10g is formed so as to reach an outer circumferential rim of the master burner cap 10 through an upper part of any one of bulkhead parts 10b positioned between master burner ports of an outer circumferential side peripheral wall part of the master burner cap 10. The bulkheads 10b act as supports to suppress narrowing of the slit burner port 10g due to thermal expansion of the master burner cap 10.

Description

technical field [0001] The invention relates to a main and auxiliary burner mainly used on a gas stove. Background technique [0002] In the past, as such a main and auxiliary burner, it is well known to have an auxiliary burner top cap and an annular main burner top cap surrounding the auxiliary burner top cap, and to have A plurality of sub burner flame holes are formed at intervals, and a plurality of main burner flame holes are formed at intervals in the circumferential direction on the peripheral wall portion on the outer peripheral side of the main burner top cap. In addition, such main and auxiliary burners are generally in the form of igniting one of the main burner and the auxiliary burner by an igniter, and then spreading the flame (extended combustion) to the flame hole of the other. [0003] Thus, the upper wall of the top cap of the main burner is provided with a notch flame hole extending in the radial direction for the flame spread between the flame hole of t...

AI Technical Summary

Problems solved by technology

[0004] However, if the outer peripheral portion of the main burner top hat is completely divided in this way, the incision flame hole becomes narrow radially outward due to the thermal expansion of the main burner top hat, and jets from the incision flame hole The amount of gas output is reduced, resulting in poor flame spread between the flame hole of the main burner and the flame hole of the auxiliary burner

In particular, when the main burner top hat is formed of a material whose thermal expansion rate is larger than that of the burner head on which it is placed, the thermal expansion of the main burner top hat is determined by the embedding of the inner peripheral side of the main burner head. In the case where the entire top cap of the main burner cannot perform equal thermal expansion due to the restriction of the joint, the notch flame hole will become the escape part of the thermal expansion of the top cap of the main burner, so the notch flame hole will easily become narrow, resulting in Deterioration of flame spread

Images