KR20130096329A - Burner for stove - Google Patents

Abstract

Not only can the cleaning and the like be easily performed, but also a good burner is obtained and the burner for the furnace having a simple structure is provided.
A burner body 5 having a cylindrical throat portion 9 extending in a vertical direction at the center of the bottom portion 8, and a burner cap 6 mounted on the burner body 5 to form a flame opening; ) And a holder (7) for supporting the burner body (5). The holder 7 is transversely formed from a base 27 having a nozzle 31 for ejecting fuel gas upward, a support piece 28 formed upright on one side of the base 27, and a support piece 28. A seat plate 29 extending in the direction and supporting the burner body opposite the base 27, and a throat inserting portion 35 into which the throat portion 9 of the burner body 5 is inserted. The base 27 and the seat plate 29 are integrally formed with the support piece 28 interposed therebetween.

Description

BURNER FOR STOVE

The present invention relates to a furnace burner.

Conventionally, a burner body attached to an upper plate, a burner cap attached to an upper portion of a burner body, and a holder positioned at a lower portion of the upper plate to support a nozzle, and having a burner body interposed therebetween A furnace burner is known in which a holder is connected by a screw member (see Japanese Patent Laid-Open No. 2006-526126).

Such a burner for the air passage has an annular chamber which faces the upper end of the burner cap with a predetermined gap from the upper end of the throat portion, and is continuous with the throat portion, and has a circumferential interval in the outer peripheral portion of the chamber. Many fireballs are formed.

When fuel gas is injected from the nozzle installed below the throat portion toward the lower opening of the throat portion, the primary air is sucked together with the fuel gas from the throat opening of the throat portion, and the mixed gas is mixed in the throat portion. It is fed to the fireball through the chamber from the top of the section. According to such a structure, there exists an advantage that the burner can be made small and light.

Japanese Patent Publication No. 2006-526126

However, in the above-described conventional example, since the burner body and the holder are connected by the screw member with the upper plate interposed therebetween, if an assembly error or misalignment of the burner body and the holder occurs due to loosening of the screw member or the like, the axis of the nozzle and the Position shift occurs in the throat part of the throat part, and there is a fear that the mixing of the fuel gas and the primary air becomes insufficient in the throat part, resulting in poor combustion.

In addition, when the burner body is removed from the top plate when cleaning or the like, the work of disconnecting the holder by the screw member is cumbersome, and the work of connecting the burner body and the holder by the screw member after cleaning is cumbersome. There are disadvantages.

Further, in the above conventional example, since the connection position of the burner body and the holder by the screw member is located closest to the fireball, the heat of the burner body is transferred to the holder at a high temperature. For this reason, the nozzle supported by the holder is heated to cause a change in the nozzle diameter due to thermal expansion or the like, and due to this effect, the fuel gas is not injected at a desired injection amount, so that there is a fear that good combustion cannot be obtained.

In view of the foregoing, it is an object of the present invention to provide a burner for an air path, in which not only the cleaning and the like can be easily performed, but also good combustion is obtained and the structure is simple.

The burner for the air path of the present invention includes a burner body having a cylindrical throat portion extending through a bottom portion of a disk shape in an up and down direction, and a plurality of flame ports mounted on and detached from the burner body. A burner cap and a holder for detachably attaching the burner body, wherein the holder includes a base provided with a nozzle for ejecting fuel gas upward, a support piece formed upright on one side of the base, and the support piece. A seat plate extending in the horizontal direction to support the burner body at a position opposed to the base and spaced apart from the base, and a throat insertion portion for inserting a throat portion of the burner body formed on the seat plate and supported by the seat plate; And the base and the seat plate are integral with the support piece therebetween. Characterized in that formed.

The burner for the air path of this invention can support a burner body in a holder only by inserting the throat part of a burner body into a throat insertion part. For this reason, not only the screwing operation | work etc. are unnecessary as conventionally but also the fall of the assembly precision by screwing can be prevented. In addition, the burner body can be easily removed from the holder, thereby facilitating cleaning and the like. In addition, since the base, the support piece, and the seat plate constituting the holder are integrally formed, the number of parts is small and the structure is simple, so that the compactness and weight can be easily achieved.

In addition, since the base of the holder, the support piece, and the seat plate are integrally formed, the positional shift of the nozzle and the throat insertion portion provided on the base does not occur. And when the throat part of a burner body is inserted into this throat insertion part, the movement of a throat part is restrict | limited by the throat insertion part. Therefore, the position shift of a throat part and a nozzle does not occur either. As a result, when the burner body is set in the holder, the position of the throat portion and the nozzle is determined with extremely high precision, and it is possible to reliably prevent the combustion failure caused by the positional shift between the throat portion and the nozzle.

Moreover, the burner body supported by the holder contacts only the throat insertion part in which the throat part was formed in a part of the seat plate of a holder. As a result, the heat transfer from the burner body to the holder can be suppressed as compared with the structure in which the burner body and the holder are connected to the closest to the fireball as in the prior art. Combustion can be obtained.

Further, in the present invention, the seat plate of the holder is provided with a cylindrical protrusion projecting upward along the outer periphery of the throat insertion portion, and seating the burner body by seating the bottom of the burner body on the upper edge of the protrusion. It is characterized by supporting.

Since the protrusion is formed on the seat plate of the holder and the burner body is seated at the upper edge of the protrusion, the contact portion of the outer periphery of the throat of the burner body and the protrusion of the holder is extremely small, so that the transfer of heat from the burner body to the holder is small. Therefore, the change in the nozzle size due to thermal expansion of the nozzle can be suppressed.

In addition, since the protrusion is formed to protrude on the seat plate of the holder, it is possible to protrude the protrusion toward the upper plate, for example. In this case, it is easy to confirm the projection by visual observation with the burner body removed from the holder.

Therefore, when attaching the burner body to the holder after cleaning or the like, the throat part of the burner body can be accurately inserted into the throat insertion part while visually seeing the protrusion, and the work of setting the burner body on the holder is extremely easy. It can be done. In addition, since foreign matters, such as broth, are less likely to penetrate into the inside by the protrusions, adhesion of foreign matters to the nozzle can be prevented.

At this time, it is preferable that the protruding portion includes a contact portion in contact with the bottom portion of the burner body and a non-contact portion that is not in contact with the bottom portion of the burner body.

According to this, since the non-contact portion is in contact with the bottom of the burner body, the contact area between the burner body and the holder is extremely small. Thereby, heat transfer to a nozzle can be reliably suppressed.

In addition, even if the soup overflowing from the pot enters the bottom side of the burner body during heating and cooking, the contact area between the burner body and the holder is extremely small, so that the burner body and the holder can be prevented from being fixed by the soup. Since the burner body can be smoothly removed from the burner body, it is possible to facilitate disassembly during cleaning and the like.

In addition, it is preferable that a coupling part is formed on a part of the protruding part, and a coupling part is formed at the bottom of the burner body by coupling to the coupling part. As the engaging portion formed in a part of the protruding portion, for example, a groove or a projection is formed, and as the engaging portion formed in the bottom portion of the burner body, for example, the engaging portion is joined to a projection or a projection of a projection. It can be said to be the home to say.

According to this, when the burner body is set in the holder, an unintentional rotation of the burner body with respect to the holder can be prevented because the engaged portion of the burner body engages with the engaging portion of the protrusion. Therefore, the state in which the burner body is supported by the holder without using a screw member or the like can be maintained with high precision.

In addition, the protrusion is formed through the upper plate of the air passage, forming a groove in a portion of the protrusion as the engaging portion, and a protrusion corresponding to the groove in a portion of the bottom of the burner body as the engaged portion When it does, it is preferable to provide the protrusion part integrally with the wall part which covers the outer side of the said groove | channel. According to this, even if the broth which overflows from a pot tries to enter the groove of a protrusion by flowing over a top board, it can prevent that a broth penetrates into an inside of an air path because a wall part blocks it.

In the present invention, a spark plug which discharges sparks between a target provided to protrude from the lower end of the burner cap is supported on the support piece of the holder, and the burner body has the spark plug at its peripheral wall portion. And a concave portion accommodating at least a portion thereof.

By accommodating at least a portion of the spark plug in the recess formed in the burner body, it is possible to avoid the influence of a drop of juice dripping from above and to maintain good operation of the spark plug.

For example, when trying to set a burner body in a holder in the state where the recessed part of a burner body and the spark plug were out of phase, the spark plug which part should be accommodated in the recessed part will be caught by the burner body. According to this, the operation of setting the burner body in the holder is prevented, so that the operator can be surely aware of the phase shift between the recess and the spark plug, and prompts the alignment of the recess and the spark plug so that the burner body can be misaligned. set) can be reliably prevented.

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory cross section which shows the burner for air paths of embodiment of this invention.
2 is a bottom view of the burner body.
Fig. 3 is a plan view showing the burner for the air path with the burner cap removed.
Fig. 4 is a perspective view showing partly the burner for the stove.
5 is a perspective view showing the holder and burner body disassembled.
6 is a side view showing the interference state of the burner body and the spark plug.
Fig. 7 is an explanatory view in plan view of the main portion of the burner for a furnace according to another embodiment;
Fig. 8 is a cross-sectional explanatory view of the main parts of the burner for a furnace of another embodiment.

Embodiment of this invention is described based on drawing. In Fig. 1, 1 indicates a part (bottom portion) of the air passage main body of the gas stove. The air passage body 1 has a box shape (not shown in the drawing) with an open upper surface, and an upper plate 2 is placed on the upper surface of the open air passage body 1.

The burner opening 3 is formed in the upper plate 2, and the air passage burner 4 which is exposed upward of the upper plate 2 through this burner opening 3 is provided. In addition, although not shown in the figure, a dent is placed on the upper plate 2 around the burner opening 3, and heating cooking can be performed by placing a cooking vessel such as a pot on the dent.

The burner 4 for the air path includes a burner body 5 positioned above the upper plate 2, a burner cap 6 mounted on the burner body 5, and an upper plate (as shown in FIG. 1). Located below 2), the holder 7 which supports the burner body 5 is provided.

The burner cap 6 is detachable from the burner body 5, and the burner body 5 is detachable from the holder 7. Accordingly, the burner body 5 and the burner cap 6 are removed from the holder 7 to facilitate the cleaning and the like.

The burner body 5 includes a disk-shaped bottom portion 8, a cylindrical throat portion 9 extending vertically through the center of the bottom portion 8, and an outer periphery of the bottom portion 8. It is comprised by the annular circumferential wall part 10 which stood up at the edge part. The throat part 9 is comprised from the upper extension part 11 extended upward of the bottom part 8, and the lower extension part 12 extended below the bottom part 8, and the upper and lower ends open.

As shown in FIG. 2, the burner body 5 is shown from the bottom face side, the bottom part 8 of the burner body 5 has the several recessed part 13 along the circumferential direction of the downward extension part 12, The protrusion 14 adjacent to a part of the downward extension part 12 is formed. Moreover, the recessed part 15 is formed in the circumferential wall part 10 of the burner body 5. As shown in FIG. 1 and FIG. 3, a part of the spark plug 16 described later is accommodated in the recess 15.

The burner cap 6 is provided with the tubular wall part 17 which seats on the upper surface of the circumferential wall part 10 of the burner body 5 as shown in FIG. The tubular wall portion 17 is provided with a plurality of grooves of different sizes, each having a different depth at intervals in the circumferential direction.

When the burner cap 6 is placed on the burner body 5, the upper portion of the burner body 5 is covered by the burner cap 6, and the upper end of the upper extension 11 of the throat portion 9 is covered with the burner cap 6. The rear surface of the burner cap 6 opposes a predetermined gap. An annular chamber 18 is formed between the upper extension 11 of the throat 9 and the circumferential wall 10. In addition, the groove formed in the barrel wall portion 17 of the burner cap 6 is formed by the main wall portion 10 of the burner body 5, and a plurality of flame holes are formed in the outer peripheral portion of the chamber 18. .

These fireballs will be described briefly, as shown in Figs. 1 and 4, in the portion of the tube wall portion 17 of the burner cap 6 facing the concave portion 15, a relatively wide small groove. This is formed so that the ignition flame opening 19 is formed on the main wall part 10 of the burner body 5.

In addition, three small grooves are formed continuously in the portion of the through-wall part 17 of the burner cap 6 which is located in the same direction as the uneven poles of the soles, which are not shown in the drawing, and the burner body 5 is formed by these small grooves. Fire extinguishing port 20 is formed on the circumferential wall 10 of the). This prevents the flame from coming into contact with the foul poles and causing poor combustion. Large grooves and small grooves are alternately formed in the portion of the cylindrical wall portion 17 of the burner cap 6 at a position corresponding to the dents, and on the circumferential wall portion 10 of the burner body 5 by the large grooves. The normal fireball 21 is formed, and the auxiliary fireball 22 is formed on the circumferential wall portion 10 of the burner body 5 by the small groove.

4, the ignition target 23 protrudes from the back surface side of the burner cap 6 corresponding to the recessed part 15 of the main wall part 10 of the burner body 5, as shown in FIG. .

In addition, at the position corresponding to the upper extension 11 of the burner body 5 on the rear surface side of the burner cap 6, the axial positioning of the burner cap 6 is made in contact with the outer peripheral surface of the upper extension 11. Three first positioning poles 24a are formed. Unintentional misalignment of the burner cap 6 placed on the burner body 5 is prevented by the first positioning pole 24a. Moreover, on the back surface side of the burner cap 6, the 2nd positioning pole 24b extended below in the predetermined position inside the cylinder wall part 17 is formed. The second positioning poles 24b determine the position of the burner cap 6 placed on the burner body 5 by engaging the positioning recesses 25 formed in the burner body 5. This prevents inadvertent rotation of the burner cap 6 with respect to the burner body 5.

As shown in Fig. 1, the holder 7 has a base 27 attached to the pedestal 26 provided on the air passage main body 1 and a support formed by standing on one side of the base 27. It consists of a piece 28 and a seat plate 29 supported by a cantilever by the support piece 28. The base 27, the support piece 28, and the seat plate 29 are integrally formed of metal blocks such as aluminum alloy.

The gas passage 30 of the fuel gas is formed in the base 27 of the holder 7, and the nozzle 31 which communicates with the gas passage 30 is attached above. The nozzle 31 is provided with the gas injection port 32 which injects fuel gas vertically upward.

When the burner body 5 is set in the holder 7, the throat 9 contacts the gas injection port 32 at the tip of the nozzle 31 and injects fuel gas toward the lower opening of the throat 9. You can do it. When fuel gas is injected from the nozzle 31 toward the lower end opening of the lower extension part 12 of the throat part 9, the fuel gas is sucked in as primary air from the surroundings and the fuel gas is introduced into the throat part 9. In the throat portion 9, the fuel gas and the primary air are mixed to generate a mixed gas. This mixed gas flows out of the upper end opening of the upper extension part 11 of the throat part 9, and touches the back surface of the burner cap 6. As shown in FIG. The mixed gas which touches the back surface of the burner cap 6 escapes to the clearance gap between the upper end of the upper extension part 11 and the back surface of the burner cap 6, and spreads in the radial direction along the back surface of the burner cap 6, and the chamber Point towards each fireball in an evenly distributed state via (18).

As shown in Figs. 3 and 5, the support piece 33 is integrally formed on the support piece 28 of the holder 7, and by the support part 33, the target 23 and the target 23 of the burner cap 6 are formed. A spark plug 16 for spark discharge is supported between the two and a thermocouple 34 for detecting a flame located outside the burner body 5 is supported.

The seat plate 29 is formed with a throat insertion portion 35 into which the lower extension portion 12 of the throat portion 9 of the burner body 5 is inserted and detached as shown in FIGS. 1 and 5. have. In addition, the seat plate 29 is formed with a cylindrical protrusion 36 formed in an annular shape along the outer periphery of the throat inserting portion 35 and protruding upward of the seat plate 29. The throat insertion part 35 and the protrusion part 36 are continuous by the same inner diameter, and the outer peripheral upper end of the downward extension part 12 is in line contact with the upper inner peripheral upper end of the protrusion 36. As shown in FIG. 1, the protruding portion 36 of the seat plate 29 penetrates through the burner opening 3 of the top plate 2, protrudes upward of the top plate 2, and the top surface of the seat plate 29 is It comes in contact with the rear surface of the upper plate 2. Although not shown in the figure, the seat plate 29 and the top plate 2 are connected by a screw member or the like. The top plate 2 is set after the air passage body 1 is assembled to a countertop, but at this time, the projection 36 determines the position of the top plate 2 so that the set of the top plate 2 is smooth. There is also an advantage that can be achieved.

The protrusions 36 are provided with grooves 37 as shown in Figs. 1 and 5. And when supporting the burner body 5 to the holder 7, the burner body 5 is inserted into the throat insertion part 35 of the seat plate 29 from the downward extension part 12 side, and burner body ( While attaching the protrusion 14 of 5) to the groove 37, the bottom portion 8 of the burner body 5 is seated on the upper edge of the protrusion 36 of the seat plate 29. The grooves 37 and the protrusions 14 correspond to the engaging portions and the engaged portions of the present invention.

As a result, the burner body 5 is phase-determined and axially aligned with respect to the holder 7, and the throat portion 9 is determined with respect to the nozzle 31, and the recessed portion of the burner body 5 Its position is determined such that 15 corresponds to the spark plug 16. At this time, since the base 27, the support piece 28, and the seat plate 29 constituting the holder 7 are integrally formed by a metal block, the nozzle 31 and the throat inserted in the base 27 are inserted. Position shift of the part 35 does not occur. And since the downward extension part 12 of the throat part 9 of the burner body 5 is restrict | limited by this throat insertion part 35, the downward extension part 12 and the nozzle of the throat part 9 are restricted. The position shift of 31 does not occur either. As a result, when the burner body 5 is set in the holder 7, the position of the throat 9 and the nozzle 31 is determined with extremely high precision, so that the throat of the throat 9 and the nozzle 31 It is possible to reliably prevent the combustion failure due to the position shift.

However, when relatively high temperature heat from the burner body 5 is transferred to the nozzle 31, the diameter of the gas injection port 32 is changed by the effect of thermal expansion of the nozzle 31, and the fuel gas is not injected at the desired injection amount. Therefore, there is a possibility that a desired amount of combustion may not be obtained. The holder 7 can be formed compactly by reducing the number of parts since the base 27, the support piece 28 and the seat plate 29 are integral, whereas the heat from the burner body 5 is retained. It is thought that it is transmitted to the nozzle 31 of the base 27 through the seat plate 29 and the support piece 28 of (7).

However, in this embodiment, the outer periphery lower end of the downward extension part 12 of the throat part 9 located in the burner body 5 comparatively away from the circumferential wall part 10 in which the flame opening is formed is a holder ( In addition to linear contact with the upper end of the inner circumference of the protrusion 36 formed on a part of the seat plate 29 of 7), the seat plate 29 of the holder 7 is located apart from the flame opening of the burner body 5. As a result, the heat transfer from the burner body 5 to the holder 7 can be suppressed as compared with the structure in which the burner body and the holder are connected at the closest position of the conventional fireball. Further, since the burner body 5 set in the holder 7 sits on the upper edge of the protrusion 36 formed in the seat plate 29 of the holder 7, the contact portion between the burner body 5 and the holder 7 Extremely small Therefore, the heat transfer from the burner body 5 to the nozzle 31 can be made small, and the change of the diameter of the gas injection port 32 by the thermal expansion of the nozzle 31 can be suppressed.

Moreover, in the bottom part 8 of the burner body 5, as shown in FIG. 2, the some recessed part 13 is formed along the circumferential direction of the downward extension part 12. As shown in FIG. Accordingly, at the upper edge of the projection 36 (indicated by an imaginary line in FIG. 2), the contact portion 36a is in contact with the bottom 8 of the burner body 5, and the recess 13 of the burner body 5. Since the non-contact part 36b which is in non-contact with the bottom part 8 of the burner body 5 is formed, the contact area of the burner body 5 and the holder 7 is further smaller. Thereby, the heat transfer to the nozzle 31 can be made extremely small, and the change of the aperture of the gas injection port 32 by the influence of heat can be prevented, and favorable combustion can be obtained. In addition, even when the soup overflowing from the pot during heating and cooking enters the bottom 8 side of the burner body 5, the contact area is small, so that the burner body 5 and the holder 7 are prevented from being fixed by the soup. It is possible to easily perform operations such as cleaning. Moreover, in this embodiment, although the example which forms the non-contact part 36b by forming the recessed part 13 in the bottom part 8 of the burner body 5 was shown, in addition, the bottom of the burner body 5 was shown. The non-contact portion may be formed by flattening the portion 8 and forming a plurality of grooves in the upper end of the protrusion 36.

In addition, since only the protrusions 36 formed on the seat plate 29 in the holder 7 protrude upward from the upper plate 2, the projections 36 of the naked eyes are removed in the state where the burner body 5 is removed from the holder 7. Easy to check Accordingly, when the burner body 5 is set in the holder 7 after cleaning or the like, the lower extension portion 12 of the burner body 5 is inserted into the throat insertion portion 35 through the protrusion 36. Since it can insert correctly, the operation of setting the burner body 5 to the holder 7 can be made extremely easy. Moreover, the burner with respect to the holder 7 only inserts the downward extension part 12 of the burner body 5 into the throat insertion part 35 with the protrusion part 36 which protrudes from the upper plate 2 interposed. Since the assembly of the body 5 is completed, not only the screwing operation or the like is necessary as in the prior art but also the degradation of the assembly accuracy due to the screwing can be prevented.

In addition, when the burner body 5 is set in the holder 7, the projection 14 of the burner body 5 engages with the groove 37 of the protrusion 36, so that the burner body 5 with respect to the holder 7 is provided. Inadvertent rotation of a) can be prevented.

However, in cooking by a gas stove, the soup overflowing from the pot onto the top plate 2 may flow under the burner body 5 and face the projection 36. At this time, if the groove 37 is formed in the protruding portion 36 of the holder 7, it can be considered that the broth penetrates into the throat insertion portion 35 through the groove 37, for example. The soup may penetrate into the air passage body 1.

Therefore, as shown in Figs. 7 and 8, it is preferable to form the wall portion 38 that covers the outer side of the groove 37 in the projection portion 36. According to this, the wall part 38 covers the outer side of the groove 37, and the broth which overflows on the top plate 2 can be prevented, and it can prevent that a broth penetrates into the air passage main body 1. As shown in FIG.

In addition, in the case of forming the wall portion 38, as shown in FIG. 8, a slight (for example, about 0.5 mm) is formed between the upper edge of the wall portion 38 and the bottom portion 8 of the burner body 5. It is preferable to set the dimension of the height direction of the wall part 38 so that the space | interval (gap) may be formed. As a result, by forming the wall portion 38, an increase in the contact area between the burner body 5 and the holder 7 can be prevented, thereby inhibiting the effect of the non-contact portion 36b caused by the recess 13. There is no

In addition, although not shown in the figure, protrusions may be formed in the protruding portion 36, and coupling grooves may be formed in the burner body 5 to be coupled to each other.

1, at least a part of the spark plug 16 is accommodated in the recessed part 15 formed in the burner body 5, as shown in FIG. As a result, even when the burner body 5 is set in the holder 7 in a state where the recessed portion 15 of the burner body 5 and the spark plug 16 are out of phase, the spark plug ( Since the work 16 is caught by the burner body 5 and the work is inhibited, the phase shift between the recess 15 and the spark plug 16 can be reliably noticed to the worker, and the recess 15 and the spark plug 16 ), The misalignment of the burner body 5 can be prevented.

One… Furnace burner, 5... Burner body, 6... Burner cap, 7... Holder, 8.. Bottom,
9 ... Throat part, 14... Projections (joint parts), 15... 16,. spark plug,
19, 20, 21, 22... Fireball, 23... Target, 27... Donation, 28... Support,
29 ... Seat plate 31. Nozzle, 35.. Throat insert, 36... projection part,
36a... 36b... Non-contact portion, 37... Groove (coupling), 38... Wall

Claims (6)

A burner body having a cylindrical throat portion extending through the bottom portion of the disc in a vertical direction;
A burner cap mounted to the burner body to be detachable from the burner body and forming a plurality of fireballs on an outer periphery;
Holder for supporting detachable burner body
Respectively,
Wherein the holder comprises:
A base provided with a nozzle for ejecting fuel gas upward;
A support piece formed by standing on one side of the base,
A seat plate extending laterally from the support piece to support the burner body at a position opposed to the base and spaced apart from the base;
A throat inserting portion formed in the seat plate and inserting a throat portion of the burner body supported by the seat plate;
Respectively,
The base and the seat plate is integrally formed with the support piece therebetween, characterized in that the burner.
The method of claim 1,
The seat plate of the holder has a cylindrical protrusion projecting upward along the outer periphery of the throat insertion portion, and supports the burner body by seating the bottom of the burner body on the upper edge of the protrusion portion. A characteristic burner.
The method of claim 2,
The protruding portion has a contact portion in contact with a bottom portion of the burner body, and a non-contact portion which is not in contact with the bottom portion of the burner body.
The method of claim 2,
The protrusion has a coupling portion therein,
The burner body has a to-be-connected part which is positioned in engagement with the engaging part and has a bottom part at the bottom thereof.
5. The method of claim 4,
The protrusion is formed through the upper plate of the air passage,
When the groove is formed in a part of the projection as the engaging portion, and a projection corresponding to the groove is formed in a part of the bottom of the burner body as the engaged portion, a wall portion covering the outer side of the groove in the projection. The burner for an air path characterized by integrally forming a part.
The method of claim 1,
The support piece of the holder is supported with a spark plug which discharges sparks between a target installed so as to protrude from the lower surface of the end of the burner cap,
The burner body has a concave portion for accommodating at least a part of the spark plug in a circumferential wall portion thereof.

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