JPH033772Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a gas burner having a flame-holding function, and particularly to the structure of a child gas burner of a parent-child gas burner.

[Background Art] In the case of a child gas burner of a conventional parent-child gas burner, a plurality of slits for main flame openings are provided radially in the cylindrical part of the burner cap, and the legs extending downward from the cylindrical part are used as burner receivers. It was formed by inserting it into the tube and placing a mounting protrusion on the upper surface of the outer surface of the leg on the upper surface of the burner receiver to provide a gap for the flame holding port between the lower surface of the cylinder and the receiver. . However, the burner cap of the secondary gas burner has a small diameter, and the width of the flame holding gap on the inner circumference is extremely small compared to the width on the outer circumference, so it moves smoothly from the inner circumference to the outer circumference of the flame holding gap. There was a drawback that the gas flow rate slowed down and the gas exiting from the outer periphery of the flame holding hole gap became slow, causing the flame holding formed by the flame holding hole to backfire, making the flame holding unstable.

[Purpose of the invention] The present invention was made in view of the above points, and the purpose of the invention is to ensure that gas flows smoothly from the inner circumference side of the flame holding hole gap to the outer circumferential side. To provide a gas burner in which a normal flame holding is formed and the flame holding is stable.

[Disclosure of the invention] The gas burner A of the invention has a burner cap 1.
A plurality of main burner opening slits 3 are provided radially in the cylindrical portion 2, and the leg portions 4 extending downward from the cylindrical portion 2 are inserted into the burner receiving portion 5 and provided at the upper part of the outer surface of the leg portion 4. A mounting protrusion 8 is placed on the upper surface of the burner receiving part 5 to provide a flame holding opening gap 6 between the lower surface of the cylinder part 2 and the burner receiving part 5. The flame holding gap 6 of the cylindrical portion 2 is designed so that the vertical height of the flame holding gap 6, which gradually increases in width toward the outer circumference, gradually increases from the outer circumference to the inner circumference.
By making the lower surface corresponding to the slope 7 higher from the outer circumferential side to the inner circumferential side, gas is smoothly supplied from the inner circumferential side to the outer circumferential side of the flame holding opening gap 6, and normal flame holding is achieved at the flame holding opening. was formed and flame retention became stable.

The present invention will be explained in detail below with reference to examples.

In the case of this embodiment, an embodiment will be described in which the gas burner A of the present invention is used as a child gas burner of a parent and child gas burner. A mixing pipe 9 for a secondary gas burner is communicated with the center of the lower surface of the burner receiving part 5 in the form of a shear plate, and a gas burner A is assembled by placing a burner cap 1 on this burner receiving part 5. The upper surface of the burner cap 1 is a mounting surface 10, and the cylindrical portion 2 is suspended from the mounting surface 10.
A plurality of main flame opening slits 3 are provided in the cylindrical portion 2 in a radial manner. Between the main flame opening slits 3 of the cylindrical part 2 is a partition part 11 having a fan-shaped plane cross section. Leg parts 4 are suspended below the bottom surface of every other partition part 11, and the upper part of the leg part 4 is A mounting protrusion 8 is provided on the outer surface. The leg portion 4 of this burner cap 1 is inserted into the burner receiving portion 5, and the mounting projection 8 is placed on the upper surface of the burner receiving portion 5. When the mounting protrusion 8 is placed on the burner receiving part 5, a flame holding gap 6 is formed between the lower surface of the partition part 11 without the legs 4 and the upper surface of the burner receiving part 5, and when viewed from above, The lower surface of the partition part 11 without legs 4 is sloped so that the vertical height of the flame holding gap 6 gradually increases from the inner circumferential side to the outer circumferential side. It is set to side 7. When gas is supplied from the mixing tube 9 and ignited, the gas ejected from the main flame opening slit 3 burns on the outer periphery of the main flame opening slit 3 to form a main flame, and the flame holding gap 6 The gas passing through burns at the outer periphery of the flame-holding opening gap 6, and a flame-holding is formed. At this time, even if the inner width of the flame-holding gap 6 is narrower than the outer width, the gas flows smoothly around the outer circumference of the flame-holding gap 6 on the inclined surface 7, and stable flame stability is formed. Ru. At this time, gas is smoothly supplied to the main burner slit 3 due to the presence of the inclined surface 7.

Further, in this embodiment, a parent gas burner B is arranged around the outer periphery of the gas burner A of the present invention, which serves as a child gas burner. This parent gas burner B is formed by placing a burner cap 15 on a burner receiving portion 14 with which a mixing pipe 13 for the parent gas burner communicates. A plurality of main burner slits 16 are provided in the circumferential direction of the burner cap 15, and the gas supplied from the mixing tube 13 is ejected from the main burner slits 16 and flows around the outer periphery of the main burner slits 16. It's starting to burn. An ignition chamber 17 is provided at a suitable position in the circumferential direction of the burner cap 15.
An ignition element 18 is shown at 7. Reference numeral 19 is a thermocouple which generates an electromotive force due to heat when the gas burner A is burning, thereby opening and holding the gas tank.

[Effects of the invention] As described above, the present invention has a structure in which the vertical height of the flame-holding opening gap, which gradually increases in width from the inner circumferential side to the outer circumferential side when viewed from the plane, gradually increases from the outer circumferential side to the inner circumferential side. The lower surface of the tube, which corresponds to the flame-holding gap, is made into an inclined surface that increases from the outer circumference to the inner circumference, so even if the flame-holding gap is narrow on the inner circumference and wide on the outer circumference, the lower surface corresponds to the flame-holding opening gap. Gas is smoothly supplied from the inner circumferential side to the outer circumferential side of the flame-holding opening gap, and a normal flame holding is formed at the flame-holding opening, thereby stabilizing the flame holding.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention seen from the front, Fig. 2 is a bottom view of the same burner cap, Fig. 3 is a half sectional view taken along the O-X line in Fig. 2,
FIG. 4 is a sectional view taken along the line O-Y in FIG. 2, in which 1 is the burner cap, 2 is the cylindrical portion, 3 is the main flame opening slit, 4 is the leg portion, 5 is the burner receiving portion, 6
7 is an inclined surface, and 8 is a mounting protrusion.

Claims (1)

[Scope of utility model registration request] A plurality of main flame opening slits are provided radially in the cylindrical part of the burner cap, and the legs protruding downward from the cylindrical part are inserted into the burner receiving part, and the mounting protrusions provided on the upper part of the outer surface of the legs are inserted into the burner receiving part. In a gas burner that is placed on the upper surface of the burner receiver and has a gap for a flame holding port between the lower surface of the cylinder and the burner receiver, the width gradually increases from the inner circumference side to the outer circumference side when viewed from the top. The lower surface of the cylindrical part corresponding to the flame holding opening gap is made into an inclined surface increasing from the outer circumference side to the inner circumference side so that the vertical height of the widening flame holding opening gap gradually increases from the outer circumference side to the inner circumference side. Gas burner.