JPH01159509A - Burner for cooking stove - Google Patents

Abstract

PURPOSE:To prevent a flame lifting phenomenon from occurring by using a bank part connecting ridges corresponding to pawls of a kettle holder at the side end parts close to the center of a burner cap as a flow resistance of a mixed gas. CONSTITUTION:The burner 1 comprises a burner body 6 and a burner cap 7. A bank part 75 is provided in ridge teeth 74 and 75 with respect to pawls 92-97 of a kettle holder 90 out of ridges 7A, and this bank part 75t is faced with the inside of a mixing chamber 6A. As a result, the bank part 75t becomes a flow resistance of the mixed gas, and the ejection speed of the mixed gas passing between ridge teeth 74 and 75 is lowered to remove the adverse effect on the pawls 92-97 or while obtaining an excellent heating condition with respect to a thermocouple 10, the flame lifting phenomenon can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a stove burner used with a trivet.

[Prior Art] A burner for a table stove has a burner body in which a mixing chamber of combustion gas and primary air is formed, and a flat opening edge is formed on the upper surface of the burner body. In this burner body, a burner cap is removably placed on the opening edge via comb-like protrusions, and a mixed gas of air and fuel gas is discharged to the outside through the gap between the protrusions. It is a flame hole.

During cooking, a spark electrode ignites the mixed gas discharged from the flame hole, forming a circular flame and heating the cooking pot. In such a burner, for example, the opening area of the flame hole corresponding to the claw of the trivet is set small to eliminate the negative effect of the flame on the claw and to obtain a good combustion state, and The opening area is made small to reduce the flame.

[Problems to be Solved by the Invention] However, if the gap between the protrusions is narrowed to reduce the opening area of the flame hole, the negative effect on the trivet will be eliminated and effective heating of the thermocouple will be obtained; A new problem arises in that the flame tends to lift.

[Object of the Invention] This invention was made in consideration of the above circumstances, and its purpose is to eliminate the negative effect of flame on the claws of trivets, or to improve the lift of the flame while obtaining a good heating condition for the thermal lightning pair. To provide a burner for a stove that has an excellent effect of preventing the phenomenon.

[Means for solving the problems] The present invention has a mixing chamber for fuel gas and primary air,
A burner body having an opening edge formed over the entire circumference on the upper surface, and comb-like protrusions arranged radially around the entire circumference on the back side corresponding to the opening edge of the burner body, A flame hole is formed in the gap between the protrusions to discharge the mixed gas from the mixing chamber, and a small flame hole portion for a trivet, a heat-sensitive element, a spark electrode, etc. is formed in the flame hole. In the burner having the formed burner 1 yap, a structure is adopted in which the protrusions of the small flame hole portion are connected by a bank at the end of the burner cap closer to the center, and the bank serves as passage resistance for the mixed gas. ing.

[Operations and Effects of the Invention] According to the present invention configured as described above, the protrusions corresponding to the claws of the trivet, etc. are connected by the bank at the center-side end of the burner cap, and the bank is used for mixing. Since this bank acts as a gas passage resistance, this embankment acts as a flow resistance for the mixed gas, reducing the speed of ejection from the flame hole, eliminating the negative effect of the flame on the trivet claw, or improving the heating state of the heat-sensitive element. It has the advantage of being able to suppress the lift of flames, while still requiring a simple structure of just providing a bank.

[Example] The present invention will be explained below based on embodiments shown in the drawings.

First, in FIGS. 1 and 2, 90 is a trivet, which is made up of a rectangular frame 91 with six claws 92, 1:) 97 formed at equal angular intervals, and is attached to the top of the stove case 5. The positions of the pawls 92 to 97 are determined by protrusions 98 inserted into the plate 51 through the holes 52 (Fig. 5), and the burner 1 is installed inside the plate 51.
has been set up. This burner 1 consists of a burner body 6 and a burner cap 7. The burner body 6 has a central fitting cylinder part 6a and an outer annular body part 6b formed concentrically with each other. The space between the annular body portion 6b and the mixing chamber 6A is defined as a mixing chamber 6A. The upper surface of the burner body 6 is open, and the upper edge of the opening is an annular surface 63 that slopes downward toward the center. A spark electrode 9 is arranged around the outer periphery of the burner body 6 along with a thermal lightning pair 10 of a safety device 4 to be described later. Further, the annular body 6b of the burner body 6 has an L-shaped duct 1 to 6B communicating with the mixing chamber 6A.
are connected (see Figure 5).

On the other hand, the burner cap 7 has a dish-like shape, and has a mounting cylinder part 72 in the center that fits into the fitting cylinder part 6a of the burner body 6, and a set of three small holes in the inner peripheral edge. Three sets of central flame holes 14a, 14b at angular intervals of 120 degrees,
14C is provided. Further, on the outer edge of the back side of the burner cap 7, a large number of protrusions 7A are radially provided around the circumference at equal intervals, and the overall shape is comb-like. As the mounting cylinder part 72 is fitted to the fitting cylinder part 6a, these protrusions 7A come into contact with the annular surface 63 to open the flame hole 13 to the outer circumferential side.
is formed.

Now, 51 on the back of burner cap 7! ! 9G claw 92
In the portion corresponding to 97 to 97, the interval A between the two protruding teeth 74 and 75 of the protruding ridges 7A is formed narrower than the interval B between the protruding ridges 7A and 7A so that a small flame hole portion is formed. These ridge teeth γ4.15 are closer to the center than the other ridges 7.
It is slightly longer than A and is formed in the radial direction while maintaining a predetermined interval. The end portions of these protruding teeth 74, 75 closer to the center are connected by a bank portion 75t, forming a U-shape as a whole.

Furthermore, the burner cap 7 has a protrusion 7x formed on the back side, and the protrusion 7x corresponds to a notch 6x provided on the inner peripheral edge of the annular surface 63 in the burner body 6.

As shown in FIGS. 3 and 4, when the burner cap 7 is attached to the burner body 6, the protrusion 7
x is fitted into the notch 6x to prevent rotation and positioning, and each protrusion tooth 14.75 abuts the annular surface 63, so that the bank 75t faces the inside of the mixing chamber 6A.

The burner 1 configured in this manner is as shown in FIG.
It is incorporated into the stove 100 of the present invention.

In this stove 100, 2 is a gas supply system to the burner 1, 3 is an ignition device for the burner 1, 4 is a safety device, and 5 is a stove case in which these members are housed.

On the other hand, the mixing pipe 8 is connected to the duct 6B and has an upstream end 81
is used as an inlet for fuel gas and primary air, and an intake port 82 for primary air is provided on the end face.

The gas supply system 2 includes a gas conduit 21, a valve 22, and a nozzle 23 whose tip is inserted into the mixing pipe 8.
2 is opened and closed by operating a knob 24, and can be maintained in an open state by the output of a thermocouple 10.

The ignition device @3 includes a spark electrode 9, a high voltage generating means 32 consisting of a combination of a piezoelectric element and a striking mechanism for applying an impact to the piezoelectric element, or a combination of a dry battery and a high voltage pulse generating circuit; It consists of a lead wire 33 for connecting. This high voltage generating means 32 is normally connected to the knob 24.
A spark is generated in the spark electrode 9 in conjunction with the opening of the valve 22, and the burner 1 is ignited.

The safety device 4 consists of a thermocouple 10 and an electromagnet (not shown) installed inside the valve 22 so that its output keeps the valve body of the valve 22 open. When the thermocouple 10 is above the set temperature, the valve 22 is kept open, and when the temperature of the thermocouple 10 falls below the set value due to extinguishing, etc., the valve body is closed by the action of a spring (not shown). Operates in the direction of the valve.

Next, the operation of the stove 100 will be explained.

When knob 24 is turned, 22 opens, and gas is ejected from a nozzle 23 connected downstream of piece 22. Air is sucked in from the primary air intake port 82 by the action of the ejector due to this jet stream of gas, mixed in the mixing pipe 8, and supplied into the mixing chamber 6A of the burner body 6. The ignition device 3 is activated in conjunction with the operation of the knob 24, and a spark is generated by the spark electrode 9. This spark ignites the air/fuel gas mixture ejected from the flame hole 13 and the central flame holes 14a, 14b, 14c to the outer periphery, respectively, to generate a flame and heat the cooking w412.

In the above configuration, 5t of the protrusions 7A! ! Since the protrusion teeth 74 and 75 corresponding to the pawls 92 to 97 of 9G are provided with a bank 75, and this bank 75t is made to face into the mixing chamber 6A, as shown by the arrow in FIG. The embankment 75t acts as a passage resistance for the mixed gas, and the ejection speed of the mixed gas passing between the protruding teeth 74 and 75 is reduced, and the negative effects of flame on the claws 92 to 97 are eliminated, so that good combustibility is not impaired. Note that the effect becomes even greater when the distance between the ridge portion 75t and the inner end of the annular surface 63 is smaller than the distance between the ridge teeth 14.75 (see FIG. 4).

While having this effect, the structure can be kept simple by providing the ridge portion 75t that connects the protruding teeth 74, 75.

In addition, when the burner cap 7 is attached, the protrusion 7x fits into the notch 6x of the burner body 6, and the five [
The convenience of positioning with respect to the claws 92 to 97 of 90 is obtained.

In the above embodiment, three sets of central flame holes are provided, each set of three small holes, but it goes without saying that the presence or absence of small holes, the number of small holes, and the number of sets are not limited to this.

In addition, the protrusions 7x and the notches 6x may be formed in such a manner that the protrusions are provided on the burner body and the notches are formed on the burner cap, contrary to the above embodiment.

Furthermore, the present invention can also be applied to a burner consisting of a burner body in which the fitting cylinder part 6a is omitted and a burner cap in which the attachment cylinder part 72 is omitted.

Moreover, in the above example, five! ! 90 claws 92 to 97
Although the number of protrusion teeth 74 and 75 corresponding to the above is set to two, the number of protrusion teeth is not limited to the above-mentioned number, and can of course be changed as appropriate.

Furthermore, the present invention can also be applied to a case where the flame hole portion for the thermal lightning pair 10 or the spark electrode 9 is made into a small flame hole portion.

Further, the number of claws in the 54!90 is not limited to that of the above embodiment, and can be changed as appropriate.

In addition, in the above embodiment, the thermal lightning pair 10 and the spark electrode 9 are located around the outer periphery of the burner body 6, but a notch-like recess is provided in the burner body, and the thermocouple and the spark electrode are placed in this recess. It may also be accommodated.

In addition, various changes may be made in the specific implementation without departing from the gist of the present invention.

[Brief explanation of the drawing]

1 to 5 show one embodiment of the present invention, in which FIG. 1 is an exploded perspective view of a burner cap and a burner body, and FIG.
The figure is a front view of the back side of the burner gap, Figure 3 is an enlarged perspective view of the burner shown with the trivet, Figure 4 is an enlarged longitudinal cross-sectional view showing how the burner gap is attached to the burner body, and Figure 5 is a gas stove. FIG.

Claims (1)

[Scope of Claims] A burner body whose interior is a mixing chamber for fuel gas and primary air, whose upper surface has an opening edge formed around the entire circumference, and a comb tooth on the back side corresponding to the opening edge of the burner body. ridges are arranged radially around the entire circumference, and are placed on the edge of the opening to form a flame hole in the gap between the ridges for discharging the mixed gas from the mixing chamber, In a burner having a burner cap in which a small flame hole is formed for a trivet, a heat-sensitive element, a spark electrode, etc. in the flame hole, the protrusion of the small flame hole is embanked at the center-side end of the burner cap. 1. A burner for a stove, characterized in that the embankment is connected by a section, and the embankment serves as a passage resistance for a mixed gas.