JPH01159510A - Burner for cooking stove - Google Patents

Abstract

PURPOSE:To prevent a flame lifting phenomenon from occurring and make predetermined burner ports to correspond to pawls of a kettle holder by providing protrusions at the upstream side of a mixed gas in small burner ports corresponding to pawls of the kettle holder, and further fitting to locate said protrusions into depressions with the fitting of a burner cap. CONSTITUTION:A burner 1 comprises a burner body 6 and a burner cap 7, and further expanded parts 75 are provided at intervals corresponding to pawls 92-97 of a kettle holder 90. As a result, the expanded parts 75 form a flow passage resistance of a mixed gas passing through interval B, and the ejection speed of the mixed gas passing through intervals between ridge teeth 74 and ridges 7A is lowered. Thus, adverse effect of flame on the pawls 92-97 is eliminated, and the flame lifting phenomenon is effectively suppressed. Further, with the fitting of the burner cap 7, the expanded part 75 is fitted into the cutaway 6x of the burner body 6 to stop rotation and positioning of the expanded part 75 with respect to the pawls 92-97 of the kettle holder 90 is performed.

Description

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

[Prior Art 1] A burner for a stove has a burner body in which a mixing chamber for 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, the mixed gas discharged from the flame hole is ignited by the spark electrode, forming a circular flame array to heat the cooking steel. 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 obtain a good combustion state, or the flame to the thermal lightning pair is set to be small. In order to achieve this, the opening area of the flame hole is made small.

[Problem to be Solved by the Invention 1] However, if the space between the protrusions is narrowed to reduce the frontage area of the flame hole, there will be no negative effect on the trivet, and an effective heating state for the thermocouple will be obtained. A new problem now arises in that the flame tends to lift.

[Purpose of the invention] This invention was made in consideration of the above circumstances, and its purpose is to eliminate the negative influence of flame on the trivet claws, and
It is possible to prevent the flame lift phenomenon while obtaining an effective heating state for the heat-sensitive element, and also has excellent effects such as being positioned with the burner cap attached and the prescribed flame hole corresponding to the trivet claw, heat-sensitive element, etc. We provide stove burners.

[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 lit to discharge the mixed gas from the mixing chamber, and a small flame hole for the trivet claw, heat-sensitive element, spark electrode, etc. is formed in the flame hole. In the burner equipped with a burner cap having a section formed therein, in the small flame hole section, an enlarged section is provided on one of the burner cap or the burner body so as to provide passage resistance on the upstream side of the mixed gas; , a configuration is adopted in which a recess is formed on the other side to receive and position the enlarged portion.

[Operations and Effects of the Invention] According to the present invention configured as described above, the protrusion is provided on the upstream side of the mixed gas in the small flame hole portion corresponding to the claw of the trivet, etc., so that the protrusion prevents the flow of the mixed gas. It becomes a resistance and reduces the ejection speed from the flame hole, eliminating the negative effect of the flame on the trivet claw, or suppressing the lift of the flame while obtaining an effective heating state for the heat-sensitive element. This has an excellent effect in that the protrusion fits into the recess and is positioned, and the predetermined flame hole can accommodate the trivet's claw, heat-sensitive element, etc.

[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 has six claws 92 to 97 formed at equal angular intervals on a rectangular frame 91, and is attached to the top plate 51 of the stove case 5. The claws 92 to 97 are positioned by a protrusion g98 inserted through the hole 52 (see Fig. 5), and there is a bar and a slot inside.
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 burner body 6 has an open upper surface, 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 thermocouple 10 of a safety device 4 to be described later. Further, the annular body 6b of the burner body 6 is connected to an L-shaped duct 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 peripheral 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 of Im, and the overall shape is a WJ tooth shape. When the mounting cylinder part 72 is fitted into the fitting cylinder part 6a, these protrusions 7A come into contact with the annular surface 63 to form a flame hole 13 that opens toward the outer circumference.

Now, on the surface of the burner cap 7, in the part corresponding to the claws 92 to 97 of the trivet 90, the protrusion teeth 74 of the protrusion 7A are placed closer to the center than the protrusion 7A so that a small flame hole is formed. It is formed into a short length at the top, and an enlarged portion 75 is continuously provided there. Projections 7A on both sides sandwiching this projection tooth 74,
In the IA, guide surfaces 7f and H are formed by notching the center side end portion so as to form a U-shape as a whole, and the guide surface 7
The distance A between f and the ampullae 75 is narrower than the distance B between the ridge teeth 74 and the ridge 7A, and the gas suspension is restricted, and at the outer interval, the lift is suppressed because it is wider than the inner interval A. A stable combustion condition can be obtained. At this time, the interval B is made narrower than the interval C between the protrusions IA and 7A so that the relationship of interval B>interval A can be obtained even when the gas gap is narrowed down.

Furthermore, the enlarged portion 75 corresponds to a notch 6x provided as a depression in the inner peripheral edge of the annular surface 63 of the burner body 6. At this time, the enlarged portion 75 is positioned upstream of the mixed gas with respect to the interval B that forms the small flame hole portion.

As shown in FIGS. 3 and 4, when the burner gap 7 is attached to the burner body 6, the enlarged portion 75 is fitted into the notch 6x to prevent rotation and position, and each protrusion tooth 74 contacts the annular surface 63, and in this state, the interval B corresponds to the claws 92 to 91 of the trivet 90 and becomes a small flame hole.

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 the open state by the output of the thermal lightning pair 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 ai voltage generating means 32 normally operates on the knob 2.
4, 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 temperature of the thermal lightning pair 10 is higher than the set temperature, the valve 22 is kept in the open state, and when the temperature of the thermal lightning pair 10 falls below the set value due to extinguishing, etc., the valve body is opened by the action of a spring (not shown). Operates in the valve closing direction.

Next, the operation of the burner 1 for a stove will be explained.

Turning the knob 24 opens the valve 22 and gas is ejected from a nozzle 23 connected downstream of the piece 22. Air is sucked in from the primary air intake port 82 by the jet flow of the gas by the action of the nitrogen controller, 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. The spark ignites the air/fuel gas mixture ejected to the outer periphery from the flame hole 13 and the central flame holes 14a, 14b, and 14c, respectively, to generate a flame and heat the cooking vA12.

In the above configuration, since the enlarged portion 75 is provided upstream of the interval B corresponding to the claws 92 to 97 of 51!90, it becomes a passage resistance for the mixed gas passing through the interval B, and the bulge part 75 acts as a passage resistance between the protrusion tIA74 and the protrusion IA. The ejection speed of the mixed gas passing through the interval B decreases,
The adverse effects of flame on the claws 92 to 97 are eliminated, and the lift phenomenon of flame is effectively suppressed.

Further, when the burner cap 7 is attached, the enlarged portion 75 is fitted into the notch 6X of the burner body 6 to prevent rotation, and the convenience of positioning the trivet 90 relative to the claws 92 to 97 is facilitated.

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.

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

Further, in the above embodiment, the interval B corresponding to the claws 92 to 97 of the trivet 90 is set at two locations, but it is of course not limited to the above set number and can be changed as appropriate.

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

Furthermore, it is also effective against small flame holes for the thermal lightning pair 10 and the spark electrode 9, and in this embodiment, the claws 92 to 9
The small flame hole for 7 was made to correspond to a thermal lightning pair and a spark electrode to form a common small flame hole.

Further, in the above embodiment, the thermal lightning pair 10 and the spark electrode 9 were provided around the outer periphery of the burner body 6, but it is also possible to provide a notch-like recess in the burner body and accommodate the thermocouple and the spark electrode in these recesses. You may also do so.

Alternatively, the enlarged portion 75 may be formed on the burner body 6 side, and a recessed portion for receiving it may be formed on the burner cap 7 side. Also, it is not necessary for all of this bulk to fit into the notch;
At least one ampullae may fit into one notch to determine the position.

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 barb cap, Figure 3 is an enlarged perspective view of the burner shown with the trivet, Figure 4 is an enlarged longitudinal sectional view showing how the burner cap 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, and whose upper surface has an opening edge formed around the entire circumference, and whose back surface corresponds to the opening edge of the burner body. Comb-like protrusions 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 protrusions for discharging the mixed gas from the mixing chamber. In addition, in a burner equipped with a burner cap having a trivet claw, a small flame hole portion for a heat-sensitive element, a spark electrode, etc. in the flame hole, in the small flame hole portion, the upstream side of the mixed gas A burner for a stove, characterized in that an enlarged portion is provided on one of the burner cap or the burner body to provide passage resistance on the side, and a recess is formed on the other side to receive and position the enlarged portion.