JPH0411765B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an improvement of a burner having a spark electrode for ignition, and particularly to a stove equipped with an annular burner cover fitted around the outer periphery of a burner body. Regarding burners for use.

[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 row of flame holes on the outer periphery of the burner body for discharging the mixed gas to the outside. is provided in a circular shape.

In this burner body, for example, two recesses are formed that are recessed toward the mixing chamber, and electrical components such as a thermocouple for flame detection and a spark electrode for ignition are accommodated in these recesses. Further, a ring-shaped burner cover is fitted onto the outer peripheral edge of the burner body outside the electrical components. This burner cover is made of a metal plate, and its upper surface is tapered outward and gently downwardly to guide boiled boiled water and the like to a saucepan. During cooking, the ignition device is operated to cause the discharge portion of the spark electrode to discharge sparks toward the burner body, thereby igniting the mixed gas discharged from the flame hole array.

[Problems to be Solved by the Invention] However, since the spark electrode is installed at a position that ensures the optimal discharge distance between the discharge part and the burner body, the discharge part cannot be moved far away from the burner cover. , the discharge part is close to the burner cover, and therefore, during ignition, discharge occurs between the spark electrode and the burner cover, and there is a possibility that ignition error may occur.

[Object of the Invention] This invention was made in consideration of the above circumstances, and its object is to provide an advantage in that the spark electrode always generates discharge toward the burner body during ignition, and there is no risk of ignition errors. An object of the present invention is to provide a burner for a stove that exhibits the following effects.

[Means for Solving the Problems] The present invention provides a burner body having a mixing chamber for primary air and fuel gas inside and a burner hole array for discharging the mixed gas from the mixing chamber to the outside; A recess is formed on the burner body side so as to be recessed toward the mixing chamber, and accommodates electrical components including at least a spark electrode with the burner body side serving as a discharge electrode. An annular burner cover that is removably fitted, and an annular burner cover provided on the inner peripheral edge of the burner cover to avoid discharge from the discharge part of the spark electrode,
A discharge avoidance means is formed by deforming a portion of the inner peripheral edge of the burner cover corresponding to the spark electrode in a direction axially away from the discharge portion of the spark electrode.

[Operations and Effects of the Invention] According to the present invention configured as described above, since the discharge avoidance means for avoiding discharge from the discharge part of the spark electrode is provided on the inner peripheral edge of the burner cover,
An excellent effect is that discharge does not occur inadvertently from the spark electrode to the burner cover during ignition, and discharge always occurs between the spark electrode and the burner body, preventing ignition errors. play.

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

First, in FIG. 1, a burner body 1 of the present invention is shown.
consists of a burner body 6 and a burner cap 7, and the burner body 6 has a central fitting cylinder part 6a and an outer annular body part 6b formed concentrically with each other. A mixing chamber 6A is provided between the two. 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. This annular surface 63 has a notched recess 6 extending across it.
2 and the recess 62a are formed adjacent to each other at an angular interval of approximately 60 degrees. These recesses 62 and 6
A flat retracting annular surface 63a and a retracting annular surface 63b are formed from each inner end of the retracting annular surface 63a and retracting annular surface 63b as part of the annular surface 63, respectively, slightly protruding into the mixing chamber 6A. Further, the annular body 6b of the burner body 6
connects an L-shaped duct 6B (shown in FIG. 5) communicating with the mixing chamber 6A at a portion diametrically opposed to the recess 62a.

On the other hand, the burner cap 7 has a dish-like shape, and a mounting cylinder part 72 that fits into the fitting cylinder part 6a of the burner body 6 is formed in the center part. Further, on the outer peripheral edge of the back side of the burner cap 7, a large number of protrusions 7A are arranged radially around the circumferential edge at equal intervals, and the entire ridge has a comb-like shape. As the mounting cylinder part 72 is fitted to the fitting cylinder part 6a, these protrusions 7A are connected to the annular surface 6.
3, forming a flame hole row 13 that opens toward the outer periphery.

Now, protrusion teeth 74a, 75a, and 76a are formed on the protrusion 7A as parts corresponding to the recess 62, and are retracted slightly toward the center compared to other parts, and the front region of these protrusion teeth is defined as the recess 7a. At the same time, long teeth 7B and 7C are formed that sandwich these protruding teeth 74a, 75a, and 76a on both sides. Also, on the protrusion 7A,
As a portion corresponding to the recess 62a, a protrusion tooth 74 is formed which is slightly retracted toward the center in the same manner as described above, and the front region of this is the recess 7b.
Elongated teeth 7D and 7E sandwiching the protruding tooth 74 on both sides are provided. Further, a protrusion 7X is formed on the burner cap 7 at a position substantially diametrically corresponding to the protrusion tooth 74, and this protrusion 7X is attached to the burner body 6.
This corresponds to the notch 6X provided in the fitting cylinder portion 6a in .

As the burner cap 7 is attached to the burner body 6, the protrusion 7X is fitted into the notch 6X to prevent rotation and positioning, and the protrusion teeth 74a, 75a, 76a and the protrusion tooth 74 are positioned at the third position.
As shown in the figure, they abut on the retracting annular surface 63a and the retracting annular surface 63b, respectively. At the same time, the recess 7a of the burner cap 7 matches the recess 62 of the burner body 6, and the recess 7b matches the recess 62a. These recesses 7a and 62 house a thermocouple (heat-sensitive element) 10 in the safety device 4, which will be described later, with the outer surface partially protruding outside.
A spark electrode 9 having a discharge portion 9a at the top is housed in the spark electrode 62a. The reason why the thermocouple 10 is provided on the outer circumferential side of the spark electrode 9 in this way is that in the event of boiling over, the boiling liquid will hit the thermocouple 10 before the spark electrode 9, stopping combustion and protecting the electrode. This is to ensure smooth re-ignition.

100 is a burner cover formed by punching a metal plate into an annular shape;
It is fitted into the outer circumferential portion of the burner body 6 through the hole a, and the outer surface thereof is tapered slightly downwardly from the burner body 6 side toward the outside. And, on the outer peripheral edge of this burner cover 100,
A curled portion 100b for draining water is formed that faces the liquid receiving tray 101 in the shape of a circular gutter. Furthermore, as shown in FIGS. 2 and 3, recesses 102 and notches 103 are formed at angular intervals of about 60 degrees on the inner peripheral edge 100a of the burner cover 100. The depression 102 constitutes the discharge avoidance means of the present invention, and is formed in a semicircular shape at the same time as the burner cover 100 is punched out at a position corresponding to the outer surface of the spark electrode 9, and the depth direction prevents sparks from the discharge part 9a. This corresponds to the direction in which the electrodes 9 are spaced apart along the axis. On the other hand, the notch 103 has a semicircular shape and fits into the outer peripheral surface of the thermocouple 10 to position and prevent the burner cover 100 from rotating, and the recess 102 corresponds to the spark electrode 9. At this time, the discharge part 9a of the spark 9 is arranged so that it can discharge against the tip (discharge electrode) P of the protruding tooth 74 separated by a distance of about 3.5 mm, and the discharge part 9a is connected to the burner cover. As shown in FIG. 4, the minimum distance with respect to 100 is substantially the distance between the discharge portion 9a and the inner bottom of the recess 102, and a dimension longer than the minimum distance when the recess 102 is not provided can be ensured. It's getting old.

Reference numeral 90 denotes a protective plate having a gently spherical upper surface, which is formed to have a slightly larger diameter than the burner cap 7, and has a flange-like eaves portion 93 integrally formed on its outer peripheral edge. The eaves portion 93 has a vertical step portion 93b at the boundary with the protection plate 90 on the inner peripheral surface side, and a tapered portion 93a that slopes downward toward the outside from the step portion 93b.
The protective plate 90 is fitted into, for example, three studs 91, which are erected at equal angular intervals as spacers on the outer peripheral edge of the burner cap 7, via stepped portions 93b, and is mounted in a positioned state.

In this state, the outer peripheral edge of the protective plate 90 protrudes outward by about 3 mm from the outer peripheral edge of the burner cap 7, and the eaves part 93 slightly protrudes toward the burner cap 7 side, so that the tapered part 93a is connected to the outer peripheral edge of the burner cap 7. It is facing with a slight gap between the two.

The burner main body 1 configured in this manner is incorporated into a stove 100A of the present invention, as shown in FIG. In this stove 100A, 2 is a gas supply system to the burner body 1, and 3 is a gas supply system to the burner body 1.
4 is an ignition device, 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 thermocouple 10 The open state can be maintained by the output.

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, and a spark is generated in the spark electrode 9 in conjunction with the opening of the valve 22, thereby igniting the burner body 1.

The safety device 4 consists of a thermocouple 10 and an electromagnet (not shown) installed in the valve 22 so as to maintain the valve body of the valve 22 in an open state with the output of the thermocouple 10, and is heated by the generated flame. When the thermocouple 10 is at or 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 22 is opened by the action of a spring (not shown). The valve body operates in the valve closing direction.

Next, the operation of the stove 100A 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 jet flow of gas, air is sucked in from the primary air intake port 82 by the action of the ejector, mixed in the mixing pipe 8, and then transferred to the burner body 6.
is supplied into the mixing chamber 6A. The ignition device 3 is activated in conjunction with the operation of the knob 24, and the spark electrode 9 generates a spark. This spark ignites the mixed gas of air and fuel gas ejected from the flame hole array 13 to the outer periphery to generate a flame and heat the cooking pot 12. At this time, secondary air is discharged from the mounting tube 72 to the outside through between the inner surface of the protective plate 90 and the upper surface of the burner cap 7 as shown by the arrow in FIG. 3, so that the air related to combustion is supplemented. . Such a flow of secondary air stabilizes the state of the flame from the flame hole array 13 and suppresses the lift phenomenon, improving combustibility, and thus improving the heating state of the cooking pot 12.

In the above configuration, since the recess 102 corresponding to the spark electrode 9 is provided in the inner peripheral edge of the burner cover 100, the minimum distance from the discharge part 9a to the burner cover 100 becomes substantially large as shown in FIG.
The spark electrode 9 always emits sparks toward the tip P of the recess 62a, and ignition errors caused by ignition operations are prevented.

Moreover, in this embodiment, since the recess 102 is formed at the same time as the burner cover 100 is formed, there is no need for a special process, which is advantageous in terms of cost.
Excellent productivity.

In addition, in the above embodiment, especially the protection plate 90
Since this is provided, the following embodiment effects can be obtained.

In other words, even if boiled water overflows from the cooking pot 12 to the outside, it will be caught on the protective plate 90 and fall onto the spark electrode 9 and the inner periphery of the mounting tube 72 through which secondary air passes. Never. This prevents early deterioration of the spark electrode 9, and eliminates insufficient secondary air circulation and clogging of the flame hole.

Furthermore, since the protective plate 90 is provided with the eaves portion 93, the following effects of the embodiment can be obtained.

In other words, spilled boiled water flowing down the protection plate 90 is removed from the eaves part 93 when it reaches the outer peripheral edge.
The water flows down to a drained state. Therefore, boiled boiled water on the protection plate 90 falls quickly. Moreover, since the protective plate 90 is detachable from the burner cap 7, the protective plate 90, which has been soiled by boiling over, can be easily removed and washed with tap water.

In the above embodiment, the recess 102 was formed in the burner cover 100 as a discharge avoidance means, but instead of the recess 102, as shown in FIG. , b may be inserted and the portion sandwiched by the cuts a and b may be bent downward to form the tongue piece 104.

Further, the cutout portion 103 of the burner cover 100 may be provided as necessary, or may be omitted during normal use.

In addition, in the above embodiment, the protective plate 90 is formed to have a larger diameter than the burner cap 7, and is set to protrude outward by about 3 mm, but the amount of protrusion is not limited to just 3 mm. Of course, it can be set to an appropriate value.

Further, in the above embodiment, the stud 91 is provided as a spacer, but a pin may be provided instead of the stud 91. Further, contrary to the above embodiment, a hole may be provided on the burner cap 7 side, a stud may be provided upright on the protective plate side, and the stud and hole may be fitted into each other during installation.

Furthermore, the burner cap 7 and the burner body 6 may be formed integrally to form the burner main body, and the protective plate 90 may be provided as necessary, but may be omitted in normal times.

In addition, in this embodiment, both the spark electrode 9 and the thermocouple 10 are housed in the recess, but at least the spark electrode 9 may be housed in the recess. Further, in the above embodiment, the recesses 7a and 7b of the burner cap 7 are
Although the upper part is formed into a notch shape, the notch portion may be omitted.

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 5 show one embodiment of the present invention, FIG. 1 is an exploded perspective view of a burner cap and burner body, FIG. 2 is an assembly view of the burner, and FIG. 3 is a vertical sectional view of the burner body. , Figure 4 is an enlarged sectional view of the main part, Figure 5 is a schematic diagram of the stove, and Figure 6 is a schematic diagram of the stove.
The figure is a perspective view of a burner cover showing another embodiment of the present invention. In the figure, 1... Burner (burner body), 6... Burner body (burner body), 7... Burner cap (burner body), 9... Spark electrode, 10... Thermocouple (heat sensitive element), 13... Flame hole row, 62, 62a... recess, 7a, 7b... recess, 100... burner cover,
102... Depression (discharge avoidance means), 104... Tongue (discharge avoidance means).

Claims (1)

[Claims] 1. The interior is a mixing chamber for primary air and fuel gas,
A burner body having a flame hole array for discharging the mixed gas from the mixing chamber to the outside, and at least a spark electrode formed on the burner body side so as to be recessed toward the mixing chamber, and with the burner body side serving as a discharge electrode. an annular burner cover that is removably fitted into the burner body outside the spark electrode in the recess; and an annular burner cover that is provided on the inner peripheral edge of the burner cover and that is connected to the discharge part of the spark electrode. To avoid the discharge of
A stove comprising a discharge avoidance means formed by deforming a portion of the inner peripheral edge of the burner cover corresponding to the spark electrode in a direction axially away from the discharge portion of the spark electrode. burner. 2. The burner for a stove according to claim 1, wherein the discharge avoidance means comprises a recess formed in the inner peripheral edge of the burner cover.