JP6049649B2 - Stove burner - Google Patents

Description

  The present invention relates to a burner for a stove used for a gas stove.

  This type of stove burner includes a mixing tube that supplies a mixed gas of fuel gas and primary air, a burner body that is connected to the mixing tube, and a large number of burners mounted on the burner body along the outer periphery. An annular burner head forming a flame hole and an ignition plug for igniting the flame hole are provided.

  And in this kind of stove burner, one in which a spark plug is housed in a part of the outer peripheral portion of the burner body is known (see Patent Document 1 below). By accommodating the spark plug in a part of the burner body, the upper part of the spark plug is covered with a part of the burner head. Thereby, compared with the case where a spark plug is arrange | positioned on the outer side of a burner body, adhesion of the boiling juice to a spark plug decreases.

JP-A-4-64807

  However, in the above-mentioned conventional one, if a large amount of boiled spilled juice flows down to the vicinity of the outer periphery of the stove burner and flows toward the stove burner, it may flow into the burner body from the outside of the spark plug housing portion. . At this time, the simmered juice sticks to the spark plug, resulting in poor discharge, or the spilled juice that has flowed into the burner body corrodes the power supply wiring of the spark plug, thereby preventing good ignition. There is a risk.

  In view of the above points, an object of the present invention is to provide a stove burner that can be ignited satisfactorily without adverse effects caused by the simmered juice.

In order to achieve such an object, the present invention provides a mixing tube that generates a mixed gas of fuel gas and primary air, a burner body that is connected to the mixing tube, and is placed on the outer periphery of the burner body. A stove burner comprising a burner head that forms a large number of flame holes and an ignition plug for igniting the flame holes, wherein the burner body includes an annular placement portion on which the burner head is placed, and the ignition A spark plug housing portion that houses a plug and has an open upper end, and the burner head covers an upper side of the spark plug housed in the spark plug housing portion and is mounted on the back upper portion of the spark plug housing portion. An igniter that forms a flame hole, and a bulge that is connected to the igniter and projects radially outward from the outer peripheral surface of the burner head to cover the inside of the igniter from the outside. The ignition plastic An upper wall facing the upper end opening of the housing portion, a pair of side hanging walls extending downward from both circumferential edges of the burner head on the upper wall, and a protruding direction of the upper wall continuously from the both side hanging walls A front drooping wall extending downward from the front end edge of the ignition flame hole, and an upper surface of the burner body along the upper end opening of the spark plug housing portion. A ridge that protrudes upward is provided on the inner side of the lower projection region of the projecting portion including the radially inward position.

  According to the present invention, since the ridge is formed along the upper end opening of the spark plug housing portion, even if the boiled juice that has flowed down in the vicinity of the burner body flows toward the burner body, the ridge is blocked by the ridge. Thus, it is possible to prevent intrusion into the spark plug housing portion and adhesion to the spark plug. As a result, occurrence of defective discharge of the spark plug, corrosion of the power supply wiring of the spark plug, and the like can be prevented, and good ignition can be performed.

  By providing the overhanging part on the burner head and covering the inside upper part of the ignition part from the outside, it is possible to prevent boiled juice flowing down from the burner head from entering the inside of the ignition part, and storing the ignition plug of the boiled juice It is possible to more reliably prevent dripping into the inside of the part and adhesion to the spark plug.

  On the other hand, since the overhanging part covers the upper part of the ignition part from the outside, the air flow inside the ignition part tends to stagnate, and the flame formed in the ignition flame hole enters the space above the ignition part. There is a risk that it will be formed downward. Therefore, in the present invention, the ridge is positioned inside the downward projection area of the projecting portion. By doing so, the secondary air flow directed from the periphery of the burner body to the inside of the ignition unit hits the convex stripe and goes to the space above the inside of the ignition unit. At this time, the stagnation of the airflow in the upper part of the ignition unit is eliminated by the secondary air flow at the same time, and at the same time, the ignition flame is surely formed upward. Thereby, the burning of the flame with respect to a spark plug can be reduced, and the lifetime reduction of a spark plug can be prevented.

The side view which shows the burner for stove of embodiment of this invention. The principal part sectional drawing of the burner for stove of this embodiment. The perspective view which shows the spacer in this embodiment. The perspective view which shows the bottom face of the burner head in this embodiment.

  An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the stove burner of the present embodiment includes a mixing tube 1, a burner body 2, a burner head 3, and a burner cap 4.

  The mixing tube 1 generates a mixed gas of the fuel gas and the primary air by taking in the fuel gas ejected from a gas nozzle (not shown) together with the primary air.

  As shown in FIG. 2, a burner body 2 is connected to the downstream end of the mixing tube 1. The burner body 2 includes a base portion 5 formed of a metal plate material and a spacer 6 formed of die casting. A spark plug 7 is provided inside the spacer 6.

  The base portion 5 of the burner body 2 includes an outer cylinder 8 and an inner cylinder 9 provided inside the outer cylinder 8, and an annular space formed between the outer cylinder 8 and the inner cylinder 9 is a mixing tube. 1 is formed.

  As shown in FIG. 2, the outer cylinder 8 of the base portion 5 is provided eccentrically in a direction in which the side on which the spark plug 7 is disposed approaches the inner cylinder 9. The base portion 5 is formed with an annular bottom raised portion 11. The lower end of the inner cylinder 9 is connected to the upper end of the bottom raised portion 11.

  As shown in FIGS. 2 and 3, the spacer 6 is connected to the base portion 5 in a state where the upper end of the outer cylinder 8 is inserted into a connecting portion 13 which is a communication opening formed in the bottom portion 12. The spacer 6 includes an annular placement portion 14 on which the burner head 3 is placed on the upper end surface.

  As shown in FIG. 1, the spacer 6 is exposed from the top plate 15 that closes the upper surface of the stove body (not shown). A burner opening 16 is formed in the top plate 15, and an annular closing plate 17 that closes a gap formed between the burner opening 16 and the spacer 6 is provided. In addition, the virtues 18 are placed on the top plate 15 on the outer periphery of the closing plate 17.

  Since the spacer 6 is formed by die casting, it is suitable for exposing from the top plate 15 because of its high aesthetics and high deformation strength.

  As shown in FIGS. 2 and 3, a spark plug housing portion 20 for housing the spark plug 7 is provided inside the outer peripheral wall 19 of the spacer 6. The spark plug housing portion 20 is a vertically long space formed along the inner surface of the outer peripheral wall 19 of the spacer 6, and the upper end thereof is opened so as to cross a part of the mounting portion 14. This opening is a plug opening 26 described later.

  As shown in FIG. 3, the spark plug 7 is housed inside the spark plug housing portion 20 in such a posture that the electrode side at the upper end thereof is inclined toward the back side of the spark plug housing portion 20. Thereby, even if the length dimension from the upper end to the lower end of the spark plug 7 is relatively large, the spark plug 7 can be accommodated inside the spark plug accommodating portion 20 while suppressing the dimension in the height direction. 7 can be stored at a position lower than the upper edge of the spark plug housing portion 20.

  As shown in FIG. 2, the spark plug housing portion 20 is provided in a relatively wide space formed by decentering the outer cylinder 8 of the base portion 5 with respect to the inner cylinder 9. The spark plug 7 is attached to the spacer 6 by being screwed to a support piece 21 extending downward from a part of the outer peripheral wall 19 of the spacer 6.

  In the present embodiment, as shown in FIG. 3, a thermocouple 22 is incorporated at a position adjacent to the spark plug housing portion 20 of the spacer 6. The thermocouple 22 is supported by the spacer 6 via a support member 23 that is partially shown in FIG.

  As shown in FIGS. 2 and 3, the spark plug housing portion 20 includes a pair of vertical wall portions 24 facing each other at a predetermined interval in the circumferential direction of the mounting portion 14, and the back side of both vertical wall portions 24. And a back wall 25 that is continuous with the plug, and at its upper end, a plug opening 26 (upper end opening) that opens above the spark plug 7 is formed. Further, a flat surface 27 is formed at the upper end of the back wall portion 25 located on the back side of the plug opening 26, and the upper surface of the spacer 6 is located outside the plug opening 26 (outside in the radial direction of the spacer 6). A protruding line 28 is provided that protrudes upward from the plug and is curved along the outer peripheral edge of the plug opening 26.

  Since the spark plug 7 is accommodated in the spark plug accommodating portion 20, even when the burner head 3 is removed during cleaning or the like as shown in FIG. It does not protrude from the plug opening 26. Thereby, it does not accidentally contact the spark plug 7 at the time of cleaning or the like, and the damage of the electrode of the spark plug 7 can be surely prevented.

  Further, the ridges 28 formed along the outer peripheral edge of the plug opening 26 of the spark plug housing portion 20 block the squeezed juice that has flowed to the outside of the placement portion 14 of the spacer 6. Thereby, it is difficult for the boiled juice to flow into the spark plug housing 20.

  As shown in FIG. 4, the burner head 3 is formed in an annular shape, and includes an annular wall 29 that is suspended from the outer periphery of the lower surface thereof. A large and small number of grooves are formed in the annular wall 29, and the large and small numbers are formed along the outer periphery of the burner head 3 when these grooves contact the mounting portion 14 of the spacer 6 as shown in FIG. 2. The cooking flame hole 30 is formed. The cooking flame holes 30 having different shapes and sizes are provided in an arrangement suitable for flame formation.

  A drooping cylinder 31 concentric with the annular wall 29 is provided on the inner periphery of the burner head 3. As shown in FIG. 2, the hanging cylinder 31 is inserted into the inner cylinder 9 of the base portion 5 of the burner body 2 when the burner head 3 is placed on the placement portion 14 of the spacer 6. At this time, the drooping cylinder 31 and the inner cylinder 9 form a hollow portion 32 that vertically penetrates the central portion of the burner body 2 and the burner head 3. In the hollow portion 32, a pan bottom temperature sensor 33 is provided. An annular burner cap 4 is provided on the upper part of the burner head 3 to prevent foreign matter from entering the hollow portion 32.

  An annular space formed between the hanging cylinder 31 of the burner head 3 and the inner surface of the spacer 6 constitutes a distribution chamber 34 communicating with the mixed gas passage 10. The mixed gas that has entered the distribution chamber 34 from the mixing tube 1 through the mixed gas passage 10 is distributed in the circumferential direction of the burner head 3 and is ejected from the cooking flame hole 30.

  Further, the burner head 3 is formed with an ignition part 35 that covers the upper side of the ignition plug 7 accommodated in the ignition plug accommodation part 20. Furthermore, the burner head 3 is formed with an overhang portion 36 that continuously extends from the ignition portion 35 and extends radially outward of the burner head 3. The ignition plug 35 and the overhanging portion 36 cover the upper portion of the spark plug housing portion 20.

  As shown in FIGS. 2 and 4, the ignition unit 35 has a contact surface 37 that contacts a flat surface 27 formed on the upper surface of the rear wall portion 25 of the spark plug housing portion 20 on the back surface, and a contact surface 37. And a pair of side wall portions 38 that extend downward from both sides. Further, the both side wall portions 38 of the igniter 35 are continuous from the hanging cylinder 31 at the back end edge, and a part of the hanging cylinder 31 located between the both side walls 38 is the rear wall of the igniting section 35. Part 39 is designated.

  When the burner head 3 is mounted on the mounting portion 14 of the spacer 6, the both side wall portions 38 of the ignition portion 35 abut on the outer sides of both vertical wall portions 24 of the spark plug housing portion 20, respectively. The rear wall 39 of the 35 faces the back wall 25 of the spark plug housing 20 with a gap. Further, the contact surface 37 of the igniter 35 is formed with a plurality of grooves serving as the ignition flame hole 40 and a discharge target 41 with a protrusion protruding downward. The ignition flame hole 40 is formed by a groove in the contact surface 37 when the contact surface 37 contacts the flat surface 27 of the spark plug housing 20. At this time, the discharge target 41 is located at a distance where the discharge from the electrode of the spark plug 7 accommodated in the spark plug accommodating portion 20 is favorably generated.

  The gap between the rear wall portion 39 of the ignition portion 35 and the rear wall portion 25 of the spark plug housing portion 20 is communicated with the distribution chamber 34 on the lower side and with the ignition flame hole 40 on the upper side. An ignition gas guide path 42 is formed. As a result, the mixed gas in the distribution chamber is supplied to the ignition flame hole 40 through the ignition gas guide path 42.

  As described above, the spark plug 7 is housed inside the spark plug housing portion 20 so that the upper electrode side is inclined toward the back side of the spark plug housing portion 20, whereby the electrode of the spark plug 7 is placed in the ignition flame hole. Since it is close to 40, it is possible to prevent ignition failure from occurring and ignite smoothly.

  The overhang portion 36 includes an upper wall 43 facing the upper side of the spark plug housing portion 20, a pair of side hanging walls 44 extending downward from both circumferential edges of the burner head 3 on the upper wall 43, and both side hanging walls A front hanging wall 45 extending downward from the leading edge of the upper wall 43 in the protruding direction. Thereby, the ignition plug 35 and the spark plug housing 20 are covered. Then, on the inner side of the downward projection region of the overhang portion 36, a ridge 28 formed on the outer peripheral edge of the plug opening 26 is located.

  The overhang portion 36 is provided on the burner head 3 so as to cover the spark plug 7 and the spark plug housing portion 20 at a position close to them. Moreover, the side hanging wall 44 and the front hanging wall 45 of the overhang portion 36 cover the upper part of the ignition unit 35 from the outside. Thereby, the penetration | invasion of the simmered juice into the inside of the ignition part 35 and the inside of the ignition plug accommodating part 20 is prevented. Further, as described above, since the protrusions 28 are formed on the upper surface of the spacer 6 along the outside of the plug opening 26 of the spark plug housing portion 20, Intrusion is also prevented.

  In addition, in the present embodiment, the electrode of the spark plug 7 is farthest from the overhanging portion 36 because the spark plug 7 is in a posture in which the electrode side at the upper end is inclined to the back side of the spark plug housing portion 20. Is located. Thus, even if the boiled spilled juice that has flowed down in the vicinity of the overhanging portion 36 enters the lower portion of the overhanging portion 36, it can be prevented that the spilled boiled spilled juice reaches the electrode of the spark plug 7. .

  Further, since the secondary air is smoothly supplied to the flame formed in the ignition flame hole 40 by the ridge 28, it is good even if the ignition flame hole 40 is located on the back side of the ignition part 35. A flame can be formed.

  That is, the outer upper side inside the ignition part 35 is surrounded by the side hanging wall 44 and the front hanging wall 45 of the overhang part 36. For this reason, air stagnates in the space from the inside upper part of the overhang part 36 to the upper part inside the ignition part 35. When the ignition flame hole 40 is ignited in this state, the flame of the ignition flame hole 40 is formed downward, and there is a possibility that the spark plug 7 is blown by the flame.

  Therefore, in the present embodiment, the ridge 28 is provided inside the lower projection region of the overhang portion 36 on the upper surface of the spacer 6. According to this, the secondary air which goes to the ignition part 35 from the outer side of the spacer 6 can be abutted on the protruding item | line 28, and direction can be changed inside the overhang | projection part 36 inside. Therefore, secondary air is also supplied to the space from the upper part of the overhanging part 36 to the upper part of the ignition part 35, and the flame formed by the ignition flame hole 40 can be stabilized. In addition, secondary air that flows upward is generated inside the ignition unit 35 by the ridges 28. For this reason, since the flame formed by the ignition flame hole 40 is directed upward, the burning of the flame with respect to the spark plug 7 can be reduced, and the life of the spark plug 7 can be prevented from being reduced.

DESCRIPTION OF SYMBOLS 1 ... Mixing pipe, 2 ... Burner body, 3 ... Burner head, 7 ... Spark plug, 14 ... Mounting part, 20 ... Spark plug accommodating part, 26 ... Opening for plugs (upper end opening), 28 ... Projection, 30 ... Cooking flame holes (flame holes), 35 ... ignition part, 36 ... overhanging part, 40 ... ignition flame hole.

Claims (1)

A mixing pipe for generating a mixed gas of fuel gas and primary air, a burner body connected to the mixing pipe, and a burner head mounted on the burner body to form a number of flame holes on the outer periphery; In a stove burner comprising an ignition plug for igniting the flame hole,
The burner body includes an annular placement portion for placing the burner head, and a spark plug housing portion that houses the spark plug and has an upper end opened.
The burner head includes an ignition part that covers an upper portion of the spark plug housed in the spark plug housing part and forms an ignition flame hole in an upper part on the back side of the spark plug housing part, and is connected to the ignition part to connect the burner A projecting portion that projects radially outward from the outer peripheral surface of the head and covers the interior upper part of the ignition unit from the outside;
The overhang portion includes an upper wall facing the upper end opening of the spark plug housing portion, a pair of side hanging walls extending downward from both circumferential edges of the burner head on the upper wall, and both side hanging walls. A front hanging wall extending continuously downward from the ignition flame hole from the leading edge of the upper wall in the protruding direction;
The upper surface of the burner body along the upper end opening of the spark plug housing portion includes a position that is radially inward of the burner body with respect to the lower edge of the front hanging wall, and is inside the lower projection region of the overhang portion A stove burner characterized in that it is provided with a ridge located above and protruding upward.