JPH0432286B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a burner for a stove, which is provided with comb-like protrusions and uses the spaces between these protrusions as flame holes for discharging a mixed gas.

[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 placed on the opening edge via comb-like protrusions, and the gap between the protrusions is used as a flame hole through which a mixed gas of air and combustion gas is discharged to the outside. .

In this burner, a thermocouple is provided as a heat-sensitive element along the outer surface of the burner body, and its tip receives the flame from the flame hole.

[Problems to be solved by the invention] However, in the case of burners for stoves, the amount of gas is controlled to increase or decrease the flame, so if the flame is increased, especially during cooking, the lift of the flame may be reduced. This causes the inconvenience that no electromotive force is generated in the heat-sensitive element, and that if the temperature is narrowed down to a small degree, it will disappear.

[Object of the Invention] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a burner for a stove that exhibits excellent effects such as preventing flame lift and extinguishing even during heating cooking. There is something to do.

[Means for Solving the Problems] The present invention includes a burner body whose interior is a mixing chamber for primary air and fuel gas and an opening edge formed on the upper surface, and a large number of burner bodies corresponding to the opening edge of the burner body. a burner head in which protrusions are formed in a comb-like shape, and a gap between the protrusions on the opening edge serves as a flame hole for discharging a mixed gas;
a heat-sensitive element that receives and outputs flame from the flame hole;
a retraction protrusion formed by slightly retracting a portion of the protrusion corresponding to the heat-sensitive element toward the center;
The part between the retraction protrusions facing the heat-sensitive element is a deep groove, and the part between the protrusions sandwiching this deep groove is a shallow groove, and the part of the retraction protrusion on the side opposite to the center of the retraction protrusion at the burner head is provided with a deep groove. A configuration is adopted in which a step portion for flame stabilization having a flat surface close to the tip of the heat-sensitive element is provided at least in the front portion of the deep groove.

[Operations and Effects of the Invention] According to the present invention configured as described above, when the amount of gas is increased when adjusting the firepower, the flame caused by the narrowed deep grooves is suppressed by the flat surface of the stepped portion, and both The flame is held stable from both sides by the gas constricted by the horizontal shallow grooves.

On the other hand, when the firepower is adjusted so that the gas amount is small, the deep grooves between the retracting protrusions provide a sufficient amount of mixed gas to heat the heat-sensitive element, thereby preventing the flame from going out.

[Example] The present invention will be described below based on an example shown in the drawings.

First, in FIG. 1, the burner 1 consists of a burner body 6 and a burner cap 7 as a burner head, and the burner body 6 is formed so that a central fitting cylinder part 6a and an outer annular body part 6b are concentric with each other. However, a mixing chamber 6A is defined between the fitting cylinder part 6a and the annular body part 6b. And Burnabody 6 is
The upper surface is open, and the upper edge of the opening is an annular surface 63 that slopes downward toward the center. In this annular surface 63, notch-shaped depressions 62, 62a are formed adjacent to each other at an angular interval of approximately 60 degrees. From each inner end of these depressions 62, 62a, the mixing chamber 6A
Retracting annular surfaces 63a and 63b that slightly protrude inward are formed to be continuous with the annular surface 63.

Further, the annular body portion 6b of the burner body 6 connects an L-shaped duct 6B (described later in FIG. 6) communicating with the mixing chamber 6A at a portion substantially diametrically opposed to the recess 62.

On the other hand, the burner cap 7 is made of a metal such as brass, and the small flame holes 14a, 14b, 1
4c, and a mounting cylinder part 72 that fits into the fitting cylinder part 6a of the burner body 6 is formed in the central part.

Further, on the outer circumferential edge of the back side of the burner cap 7, a large number of protrusions 7A are provided radially around the circumference at equal intervals except for the portions corresponding to the recesses 62, 62a of the burner body 6, and the entire ridge has a comb-like shape. ing. 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 array 13 that opens toward the outer circumference.

Now, as shown in FIG. 2, in the portion of the burner body 6 corresponding to the recess 62, there are retraction protrusions 74a, 75a, 7 that are retracted slightly closer to the center than the protrusion 7A.
6a are formed along the radial direction, and a convex area R is provided in the front region thereof, and long teeth 7 are provided on both sides sandwiching these retraction protrusions 74a, 75a, and 76a.
H, 7J are provided. As shown in FIG. 3, the area R forms a stepped portion S whose lower surface becomes a horizontal flat surface H _P by increasing the thickness dimension.
At this time, between the retraction protrusions 74a and 75a and between the retraction protrusions 75a and 76a, deep grooves G1 and G2 with a depth h1 of, for example, 3.0 mm are formed as shown in FIG. 4, and the upper groove width a and the lower groove width are 2.25mm each
and 1.35mm. In addition, between the long teeth 7H and the retraction protrusion 74a, and between the long teeth 7J and the retraction protrusion 76
Between a is a shallow groove G with a depth h2 of, for example, 2.0 mm.
3, G4 are formed, and the upper groove width a and the lower groove width b are 2.25 mm and 1.35 mm as above.

Furthermore, in the part corresponding to the recess 62a of the burner body 6, retraction protrusions 74 and 75 are provided slightly closer to the center than the protrusion 7A, and a discharge protrusion D _C is provided in the front area thereof, and a retraction protrusion Article 74, 7
Long teeth 7F and 7G sandwiching the tooth 5 on both sides are formed.

Furthermore, a protrusion 7X is formed at the position of the protrusion 7A corresponding to the retraction protrusion 74, 75 in the approximate diametrical direction, and this protrusion 7X is formed on the upper end surface of the mounting cylinder portion 72 of the burner body 6. Compatible with chip 6X.

As shown in FIG. 5, when the burner cap 7 is attached to the burner body 6, the protrusion 7X
is fitted into the notch 6X to position and prevent rotation, and the retracting protrusions 74, 75 and the retracting protrusions 74a, 75a, 76a are connected to the retracting annular surface 63b,
63a, and the protrusion 7A abuts on the annular surface 63. At the same time, the stepped portion S of the burner cap 7 is located opposite the recess 62, and the discharge protrusion D _C matches the recess 62a. A thermocouple 10 as a heat-sensitive element is placed in the depression 62.
is housed for use in flame detection, and is positioned so that its tip is close to the flat surface H _P of the stepped portion S.
Further, the recess 62a accommodates a spark electrode 9 for ignition.

The burner 1 configured in this manner is incorporated into a stove 100 of the present invention, as shown in FIG. In this stove 100, 2 is 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 tube 8 is connected to the duct 6B, and an upstream end 81 serves as an introduction section for the fuel gas and primary air, and an intake port 82 for the primary air is provided on the end surface.

The gas supply system 2 includes a gas conduit 21, a valve 22, and a nozzle 23 whose tip is inserted into the mixing tube 8. The valve 22 is opened and closed by operating a knob 24, and the output of the thermocouple 10 This makes it possible to maintain the open state.

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 to be connected. This high voltage generating means 32 is normally operated by 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 includes a thermocouple 10 and a valve 22 that maintains the valve body of the valve 22 in an open state using the thermocouple 10.
When the temperature of the thermocouple 10 is higher than the set temperature due to heating by the flame, the valve 22 is kept open, and the thermocouple 10 is kept open by extinguishing the flame. When the temperature of the valve body falls below a set value, the valve element is actuated in the valve closing direction by the action of a spring (not shown).

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

When the knob 24 is turned, the valve 22 opens, and gas is ejected from a nozzle 23 connected downstream of the valve 22. Due to this gas jet flow, air is sucked in from the primary air intake port 82 by the action of the ejector, mixed in the mixing tube 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 between the spark electrode 9 and the discharge protrusion D _C. The sparks ignite the air/fuel gas mixture ejected from the flame hole rows 13 to the outside, generating flames and heating the cooking pot 12.

According to the above configuration, when the amount of gas is increased during cooking, the flame caused by the gas in the narrowed deep grooves G1 and G2 is suppressed by the flat surface H _P of the step S, and the shallow grooves G3 on both sides , the flame is held stable from both sides by the gas throttled by G4.

On the other hand, when cooking is performed using a small amount of gas, the deep grooves G1 and G2 between the retracting protrusions 74a, 75a, 75a, and 76a provide enough mixed gas to heat the thermocouple 10, and the flame does not go out. Prevented.

Furthermore, since there is a stepped portion S in front of the shallow grooves G3 and G4, when the gas amount is set to a large amount, the flame holding effect becomes more stable and high. At this time, shallow groove G3,
Since the step S in the front part of G4 is retracted toward the center, the flame spreads easily from between the protrusions 7A and 7A.

Furthermore, as the flame stabilizes and there is no lift, the heating condition for the thermocouple 10 becomes better,
The advantage of this embodiment is that malfunctions of the thermocouple 10 are eliminated and the expected normal function is maintained.

In addition, the number of retraction protrusions is 74 in the case of the above embodiment.
Although three are provided as a, 75a, and 76a, this number can be changed depending on the situation.

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

[Brief explanation of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is an exploded perspective view of a burner cap and burner body, FIG. 2 is a back view of the burner cap,
FIG. 3 is a sectional view of the burner cap, FIG. 4 is an enlarged sectional view of the main part, FIG. 5 is a perspective view showing the burner installed, and FIG. 6 is a schematic diagram of the stove. In the figure, 6... burner body, 7... burner cap (burner head), 9... spark electrode, 10
... Thermocouple (heat-sensitive element), 13 ... Flame hole row, 74
a, 75a, 76a... Retraction protrusion, G1, G2...
...deep groove, G3, G4...shallow groove, S...step, H _P
...Flat surface.

Claims (1)

[Claims] 1. The interior is a mixing chamber for primary air and fuel gas,
A burner body having an opening edge formed on the upper surface, a number of protrusions formed in a comb-like shape corresponding to the opening edge of the burner body, and gaps between the protrusions on the opening edge for discharging a mixed gas. a burner head serving as a flame hole; a heat-sensitive element arranged on the outer peripheral edge side of the burner head and outputting flame after receiving the flame from the flame hole; and a portion of the protrusion corresponding to the heat-sensitive element centered on the a retraction protrusion formed by slightly retracting in the direction; a part between the retraction protrusions that faces the heat-sensitive element is a deep groove; and a space between the protrusions sandwiching the deep groove is a shallow groove; A step part for flame stabilization having a flat surface close to the tip of the heat-sensitive element is provided at least in the front part of the deep groove on the opposite side of the center side of the retraction protrusion at the head part. Burner for stove.